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    • 专利摘要:
    The invention relates to a method for determining a filling level (F) of waste water (8) in a tank (6) of a vehicle (2), wherein a respective rinsing quantity (P) of waste water (8) is supplied to the reservoir (6) by rinsing operations, a binary filling signal (La-d) (waste water (8) present or not) is determined at at least two measuring positions (20a). (d) on the tank (6) having known filling quantities (Ma-d), the filling level (F) is determined as the sum of a basic filling quantity (B) and a quantity of influx (Z), the base filling amount (B) being chosen equal to zero or as the largest filling amount (Mad) of filling signals (La-d) active at a starting instant, and the quantity of filling influx (Z) being determined as the sum of all rinse quantities (P) fed from the start time.
    公开号:FR3067807A1
    申请号:FR1854995
    申请日:2018-06-08
    公开日:2018-12-21
    发明作者:Jan Boris Philipp
    申请人:APPBAU GAUTING GmbH；APPARATEBAU GAUTING GmbH；Diehl Aviation Gilching GmbH；
    IPC主号:
    专利说明:

    - 1 DESCRIPTION
    The invention relates to a method for determining a level of waste water in a tank on board a vehicle, a measuring device for determining a level of waste water in a tank on board a vehicle and a device for waste water for a vehicle.
    It is known, for example from document EP 0 295 508 A1, to equip a vehicle in the form of an airplane with a waste water tank to collect the waste water from a sink and a toilet.
    In particular during a trip or a flight, it is desirable to know, that is to say to measure or determine the level of waste water in the waste water tank. It is known from practice that level measurement on vehicle waste water tanks is difficult, because deposits and environmental influences limit the usual methods of level measurement. Possible solutions for level measurement are based, for example, on capacitive measurement networks (meshes) and pressure sensors (absolute and differential pressure). Experience has shown that the problem with networks is that deposits lead to measurement errors. Pressure sensors have relatively large measurement errors, which leads to very large measurement inaccuracies, especially for small tanks. In addition, the pressure sensors depend on variations in the ambient temperature.
    The aim of the invention is to improve the determination of the filling level of vehicle waste water tanks.
    The object is achieved by a method for determining a filling level of waste water in a tank on board a vehicle, in which a respective flush quantity of waste water is supplied to the tank by flushing operations, characterized in what
    a binary filling signal is determined at at least two different measurement positions on the tank, which indicates whether wastewater is present there or not, the quantities of filling of the tank associated with the measurement positions being known and different,
    - the filling level is determined as the sum of a basic filling quantity and an inflow quantity,
    -2- if none of the filling signals is active: the basic filling quantity is chosen equal to zero, and
    - otherwise all the currently active filling signals and the associated filling quantities are determined and the largest of the determined filling quantities is chosen as the basic filling quantity, and
    - to determine the amount of inflow, we choose a start time as the time when the amount of basic filling in the tank is reached,
    - the amount of inflow is determined as the sum of all the flushing quantities which are brought to the tank from the time of departure.
    Thus, the method is applied to a tank on board a vehicle or presupposes such a tank, to which a respective quantity of rinsing waste water is supplied by rinsing operations.
    The vehicle is in particular a nautical vehicle, in particular a ship, or an air vehicle, in particular an airplane.
    According to the method, and as indicated above, a binary filling signal is determined at at least two different measurement positions on the tank. The filling signal indicates at the respective location or at the measuring position on the tank whether or not wastewater is present, i.e. whether the current level of wastewater has already reached corresponding measurement position. The tank filling quantities associated with the corresponding measurement positions are assumed to be known (for example from the geometry of the tank and the measurement positions or locations on the tank) and are different from one another. In the process, the fill level is determined as the sum of a base fill amount and an inflow amount.
    The basic filling quantity is determined as follows: if none of the filling signals is active, the basic quantity is chosen equal to zero. If at least one of the fill signals is active, all the currently active fill signals are determined first. At the corresponding measuring positions, where the active filling signals predominate, the corresponding filling quantities are determined or evaluated. The largest of the quantities
    -3 determined fill is chosen as the base fill quantity.
    To determine the amount of inflow, a start time is first chosen. The start time is the time at which the corresponding basic filling quantity in the tank is or has been reached. The amount of inflow is then determined as the sum of all the flushing amounts that are brought to the tank from the start time.
    If the basic filling quantity is chosen equal to zero and the instant at which an actual filling level of zero (empty tank) is knowingly reached is unknown, we choose instead as the starting instant the instant at which the execution of the process according to the invention has started and from which all the rinsing quantities are added. The starting point of the process is, for example, the activation of a filling level measurement system which performs the process.
    In this case, if none of the filling signals is active, the actual filling quantity can also be different from zero. For example, there may already be a certain amount of waste water in the tank, but that is not yet sufficient to reach the lowest measurement position of the tank. However, from the start of the process, all amounts of inflow or flush are added to indicate at least an increase in the wastewater in the tank. As soon as the level reaches the lowest measuring position (i.e. the one with the lowest filling quantity), the first filling signal becomes active and the basic filling quantity is correctly selected as the quantity of associated filling. Then, a new start time is chosen: the start time for this consideration is then the activation of the corresponding lowest filling signal. From there, the rinse amounts are added up incrementally (from an inflow amount of zero) to the base fill amount using the inflow amount.
    A corresponding flushing volume per flushing operation can be measured accurately, but can also be estimated or, for example, assumed on the basis of average values. In general, the amount of rinse or its sum, i.e. the inflow volume, is known only with a relatively large error, for example 400 ml +/- 100 ml. This is why we use reference points, in the form of signals
    -4 filling or measurement positions and associated filling quantities, known or precisely determinable.
    In other words, each measurement position is monitored to see whether its binary filling signal changes from an inactive state to an active state, which means that the wastewater has reached the measurement position by that time. in relation to their filling level, that is to say that the filling level then corresponds exactly to the known filling quantity at the measurement position.
    The binary filling signal can therefore take two states: "active" and "inactive". However, this can also be generated by means of a continuous or multi-value signal, for example by monitoring limit values. An active filling signal means that wastewater is present at the measuring position, i.e. the filling level corresponds at least to the corresponding filling quantity. An inactive filling signal means that the filling level has not yet reached the measuring position and is therefore lower than the corresponding filling quantity.
    The measurement positions correspond, for example, to tank filling quantities of 10%, 50%, 75% and 100%.
    For the purposes of the invention, an "airplane" should be understood as representative of all air vehicles in the broad sense and also includes other flying machines equipped with corresponding wastewater systems, for example helicopters.
    For the description according to the invention, the filling quantities, filling levels, etc. refer in the first place to a known, in particular planar, orientation of the reservoir at rest, that is to say refer to a neutral position of the reservoir. In this case, the orientation of the surface of the wastewater is known and it is assumed to be plane.
    In particular, the method according to the invention detects all the rinsing operations which bring or can bring waste water to the tank. The filling level is then exactly correlated with the amount of inflow.
    According to the invention, this results in a continuous filling level measurement system based on discrete and reliable measurement points (filling signals at the measurement points) and an interpolation between them (summation of the flushing flush quantities) based on the influx into the tank. The filling signal can be generated by
    -5 particular by means of a tank position sensor (TPS). In this sense, it results from the invention a filling level measurement system TPS.
    In the context of the present patent application, it is always necessary to take account of appropriate tolerances, which depend in particular on the inaccuracy of the rinsing quantities, the filling levels, the content of the tank, the measurement tolerances of the sensors, etc. . This applies in particular, for example, to filling levels based on estimated or determined rinse quantities.
    In a preferred embodiment, the following steps are taken to determine the amounts of rinsing which add up to form the amount of inflow: from the start time, all the rinsing operations are detected and a quantity of rinsing preset is associated with each flushing operation. These rinse amounts are then added to form the inflow amount.
    The rinse quantity which can be preset per rinse operation is in particular an estimated, averaged or empirically determined rinse quantity, for example a standard rinse quantity for a corresponding rinse operation, which is generally triggered by the rinse signal. In particular, all rinsing operations are counted and multiplied by a uniform standard value or an average value for the rinsing quantities. However, different categories of rinsing signals can be taken into account, for example, rinsing a toilet, rinsing a sink, a Galley Waste Disposai Unit or the operation of a dishwasher. An average amount of rinsing can then be associated with each category. The determination of the amount of inflow is then limited to a simple counting of the rinsing operations and the multiplication by the standard rinsing amount. In particular, a corresponding weighting with different standard rinse quantities takes place for rinse operations, for example, rinse operations for sinks, kitchen sinks, WCs or bidets are detected separately, and a quantity corresponding medium rinse is associated with each actuation category. This improves the accuracy of detection of the amount of wastewater supplied to the tank.
    If necessary, additional quantities, which are not detected by an accounting flushing operation, are also
    -6enregistrées. For example, if only toilet flush actuations are detected, an average flush amount of the toilet flush plus an average flush amount of a sink can be used as the flush quantity, because may assume that the sink is also used each time the toilet is used. There is therefore no need to detect a separate rinse operation at the sink. A corresponding procedure thus makes it possible to detect the quantities of rinsing waste water which cannot be detected themselves by means of a rinsing operation or a rinsing signal.
    In particular, according to the method, all the rinse generators and / or all the corresponding sensors which can indicate a rinse operation (rinse signal) are included in the corresponding determination. This ensures that, if possible, all sources of wastewater inflow are detected and that a particularly accurate estimate of the amount of inflow is possible.
    In a preferred embodiment, for the determination of the start time, all the filling signals are monitored to know whether they are going from inactive to active. It is then determined or chosen as the start time either the time at which it is known that the tank is empty or empty, or the time at which one of the filling signals changes from inactive to active. In the first case, it is assumed that the lowest amount of filling level detectable by sensor (lowest measurement position) is not placed at the location of the zero filling amount. In other words, no "empty tank" signal is available. The filling levels in the range between empty tank and reaching the lowest filling level can therefore only be determined from the amount of inflow. To do this, you must choose an appropriate start time. This is particularly the case where it is known that the tank becomes empty, is emptied or is empty. In this way, it is thus particularly simple to determine the starting times.
    In a preferred embodiment, the determined fill level is considered unreliable if more than one continuous range of active fill signals and / or more than one continuous range of inactive fill signals are detected for measurement positions growing. The "increasing" measurement positions are the measurement positions in the order in which the filling quantities associated with them continue to increase. This must be understood in a way
    -7 general; the decisive criterion for continuous ranges is an order of magnitude of the corresponding filling quantities in the increasing or decreasing direction. This embodiment is based on the idea that there is always in the tank a lower zone which is filled with waste water and an upper zone which is not filled with waste water. Consequently, all the sensors located in the filled area must be continuously active and all the sensors located in the unfilled area must be inactive. Inactive filling signals in areas filled with waste water or active in unfilled areas therefore indicate an error, for example a malfunction of the sensors or filling signals. It is thus known in the process that the filling level is currently not determined reliably.
    In a preferred embodiment, the determined filling level is considered to be unreliable if the following criteria are met: in the case where none of the filling signals is active when the amount of inflow (or in this case, the filling level, since the basic filling quantity is zero) exceeds the filling quantity of the lowest measuring position or the smallest filling quantity. Otherwise (if at least one of the filling signals is active), if the determined inflow quantity exceeds the difference between the filling quantities associated with the currently lowest inactive filling signal and the currently highest filling signal. In both cases, an amount of inflow is determined, which should trigger one of the filling signals, i.e. in the first case, the lowest filling signal should be active, since depending on the amount of inflow, the lowest measurement position should already be covered with wastewater. In the second case, the next (inactive) fill signal should be active, since the sum of the fill amount at the currently highest active fill signal and the amount of inflow should already cover the position with wastewater. immediately higher corresponding measurement.
    Another preferred embodiment is based on the fact that a filling level is actually known with certainty as the actual filling level in the tank, for example by a separate measurement or, for example, by knowing the empty state of the tank (filling level equal to zero) by knowingly emptying the tank. In this case, a
    -8 amount of control influx is determined in addition from this control instant, which is the sum of all the flushing quantities supplied to the tank from the control instant. A control fill level is then determined as the sum of the actual fill level actually known and the amount of control surge. This control filling level can then always be compared with the filling level determined according to the process. In the event of deviations, it can also be concluded that there is an error, i.e. that the determined filling level is no longer reliable.
    In a preferred variant of this embodiment, a full tank is detected when the determined filling level or the control filling level has reached the admissible capacity of the tank. Alternatively or additionally, an error is detected if the control fill level exceeds a fill amount that is associated with a currently inactive fill signal or if the control fill level falls below a fill amount that is associated with a currently active filling signal. This makes it possible to highlight the contradictions between the determined filling level and the determined control filling level, which must always be consistent.
    In a preferred embodiment, the second highest measurement position in the tank is monitored for a transition from an inactive fill signal to an active fill signal. From such a transition, a minimum number of rinsing operations or a minimum sum of rinsing quantities is still permitted - regardless of the filling signal at the highest filling position - without a signal "Full tank" is generated or a filling is interrupted or prohibited. The number is chosen according to the criterion that the sum of the associated flushing quantities remains less than the remaining filling capacity of the tank. This tank capacity is determined from the difference between the maximum filling quantities of the tank and the filling quantity of the second highest filling position. In this way, a minimum number of rinsing operations can be ensured from the activation of the second highest filling signal, without a message "tank full" preventing any further filling due to a signal of highest filling faulty.
    The object of the invention is also achieved by a measuring device for determining a level of filling of waste water in a tank on board a vehicle, the vehicle containing at least one rinsing generator being able to be actuated by a signal. rinse and a respective rinse quantity of waste water being supplied to the tank each time the rinse generator is activated during a rinse operation,
    - with an evaluation module, characterized in that
    - the evaluation module has an interface with at least one of the rinsing generators to receive the respective rinsing signals,
    - in which the evaluation module a predefined rinse quantity of wastewater is associated with each rinse signal,
    - the measurement device comprises at least two sensors which can be mounted on the tank at different measurement positions to generate the filling signals which are connected by signals to the evaluation module,
    - in which evaluation module a binary filling signal is present for each of the sensors, which indicates whether wastewater is present there or not,
    - in which the evaluation module a known filling quantity of the tank is associated with each filling signal,
    the evaluation module being designed to determine the filling level as the sum of a quantity of basic filling and a quantity of inflow according to the process mentioned above, the quantity of basic filling being determined at from the filling signals and the amount of inflow from the rinsing signals.
    The measuring device is thus, in accordance with the destination, designed for a specific vehicle or based on such a vehicle, or the measuring device is intended to be used in such a vehicle in accordance with the destination: the vehicle has at least one generator which can be activated by a rinse signal. The same is true for the fact that a respective amount of rinsing wastewater is supplied to the reservoir each time the rinsing generator is activated during a rinsing operation.
    - 10 As indicated above, the measurement device contains an evaluation module. The evaluation module contains an interface. The interface leads to at least one of the flushing generators and is used to receive the respective flushing signals. In the evaluation module, a preset quantity of waste water is associated with each rinse signal. The measuring device contains at least two sensors which can be mounted on the tank at different measuring positions or which must be mounted there according to the destination. The measurement positions differ from one another as explained above by the different amounts of filling in the tank associated with them at the corresponding measurement positions. The sensors are connected to the evaluation module by signals to transmit a binary filling signal generated by them to the evaluation module.
    The evaluation module is designed to determine the filling level as the sum of a quantity of basic filling and a quantity of inflow according to the method according to the invention. The basic filling quantity is determined using the filling signals. The amount of inflow is determined from the flushing signals. However, other information and signals may also be included in the corresponding determinations or calculations.
    The measuring device and at least some of its embodiments as well as their respective advantages have already been explained by analogy in relation to the method according to the invention mentioned above.
    The determination or the formation of the filling signals is therefore carried out using a respective sensor. The basic filling amount is therefore determined from the sensor signals as described above.
    The basic filling quantity (in particular for an empty tank or below the lowest sensor) is also determined on the basis of known filling levels, for example for the known empty state of the tank. The amount of inflow is also determined using fill signals and / or time monitors, as described above.
    A rinse generator is in particular an electrically controlled water tap on a sink or toilet flush or in a dishwasher, etc. or a corresponding actuator of a flush
    - 11 WCs or for the supply of water to a sink. The rinsing signal is in particular the activation signal for opening the water tap. The predefinable filling quantity is in particular the known filling quantity at a sensor mounting location conforming to the destination. The amount of flushing is known, for example, from the corresponding destination flushing generator data. The interface and the connection of the rinsing generators to the evaluation module is in particular an interface with a CAN bus of a vehicle. The information from the rinsing generators or the filling signals can be very easily obtained by connecting the corresponding sensors to the CAN bus and by receiving the corresponding signals via the CAN bus.
    In a preferred embodiment, the rinsing quantities and the filling quantities are known on the basis of a reservoir and a rinsing generator conforming to the destination of the measuring device.
    The measuring device is then made in such a way that it is intended in accordance with the intended purpose to be used on the tanks and specific rinsing generators concerned or of elements of the same type corresponding and that it is also suitably adapted for those -this, for example programmed with the filling quantities and the rinsing quantities concerned. The quantities concerned can be determined (in particular in advance) by measurements, calculations, etc. using design data, etc. of the entire wastewater device formed by the tank and the rinsing generators, etc., for example also by tests, empirically or by forming averages, etc. The quantities are determined in particular on the basis of a statistical evaluation of quantities or of concrete rinsing operations measured in wastewater devices conforming to the destination (of the same type).
    In particular, the measuring device is intended to be used in accordance with the intended purpose in a specific vehicle or type of vehicle for which the corresponding rinsing tanks and generators are known as well as the rinsing quantities produced.
    In a preferred embodiment, the evaluation module presents an interface for the flight attitude data of the vehicle in the form of an airplane. The evaluation module is designed to determine the filling level also based on flight attitude data and a known geometry of a tank conforming to the destination.
    - 12As explained above, the preceding considerations have always been based on a flat or oriented tank in a known position. Since the liquid surface is no longer flat when the tank is tilted or during an acceleration in flight, the same sensors will provide different filling signals for the same actual filling level of the tank in different flight attitudes. This can be taken into account by the flight attitude and in particular the geometry of the tank and the position of the sensors on the tank. It is thus possible to include in the calculations the fact that if the tank surface is not flat, other sensors react for the same filling level or that the filling quantities corresponding to the measurement positions change, depending on the actual spatial position of the tank or the orientation of the surface of the wastewater in the tank. The calculation of the filling level thus remains correct in all flight attitudes and situations.
    In a preferred embodiment, the evaluation module contains a filter which is designed to filter the filling signals with regard to the unevenness of a surface of wastewater in the tank. When moving or in flight or when the tank is in motion, the wastewater can wave or wobble, and liquid splashes can reach the sensors. The sensors can then generate filling signals which do not correspond to the actual filling level of the tank. All of these factors, however, cause temporary, periodic or short-term disturbances in the filling signals and can be filtered by corresponding filtering algorithms, so that short-term or temporary surface movements of wastewater, etc. are not taken into account in determining the filling level. Such a filter can therefore also be called an anti-sloshing filter. The matching filtering, however, does not affect longer term changes in fill signals due to longer term changes in flight or flight attitudes, such as those that occur during a descent or climb of several minutes. These effects are in particular taken into account in determining the filling level by the flight attitude correction mentioned above.
    The object of the invention is also achieved by a waste water device for a vehicle, which comprises a tank that can be filled with waste water intended to be loaded on the vehicle and at least one
    - 13 rinse generator that can be mounted in the vehicle and be activated by a rinse signal, a quantity of waste water being supplied to the tank each time the rinse generator is activated during a rinse operation. The wastewater device contains a measuring device according to the invention, as described above.
    The wastewater device and at least part of its embodiments and their respective advantages have already been explained by analogy in relation to the measuring device according to the invention or the method according to the invention.
    In a wastewater device, in particular the characteristics of the rinsing generators, i.e. the actual rinsing quantities per rinsing operation as well as the geometry of the tank and the corresponding measurement positions and the filling quantities associated are known with precision and can therefore be taken into account more precisely and more reliably in the process. In particular, in the wastewater device, the wastewater is brought to the tank exclusively by actuating one of the rinsing generators of the wastewater device by means of the corresponding flushing signal. Thus, each supply of used water to the tank is detected with precision and can therefore be included in an improved determination of the filling level.
    In a preferred embodiment, the sensors are arranged at tank filling positions which correspond to filling quantities uniformly distributed in the tank. As a variant, the sensors are arranged at filling positions of the reservoir, the associated filling quantities of which are distributed asymmetrically towards the upper filling levels. These data also refer to a neutral position of the tank, that is to say to its plane orientation. The uniform distribution of the sensors in relation to the filling quantities ensures that the same amounts of influx are necessary each time to activate the immediately higher sensor. The errors that result from determining the amount of inflow are therefore distributed evenly over the entire measurement range between the lowest and highest sensors. In the other case of an asymmetric distribution, for higher filling levels, the respective inflow quantities to reach each time the filling quantity at the next measurement position decrease. This ensures that in the "upper" filling area of the tank, so the more
    - 14 fills, the exact detection of the filling levels by means of basic filling quantities can be done in finer increments thanks to a densification of the sensors. Errors due to improperly determined inflow quantities are therefore less important for high filling levels. This allows a more precise determination of the filling level of the tank and therefore of the remaining capacity of the tank before the wastewater tank is almost completely filled. In the second case, detection by the sensors is more precise and we can expect fewer errors by interpolation in the upper critical filling area.
    In a preferred embodiment, the method according to the invention described above is implemented using a measuring device according to the invention and / or using a wastewater device according to the invention.
    The invention is based on the following findings, observations or considerations and further presents the following embodiments. For simplicity, the embodiments are sometimes also called "the invention". The embodiments may also contain parts or combinations of the embodiments mentioned above or correspond to them and / or, where appropriate, include embodiments not mentioned above.
    The invention is based on the following considerations: a filling level measurement would be possible in the following way: a waste water tank has a full tank sensor (TFS) and an absolute pressure sensor (APS) , absolute pressure sensor) in the lower and upper zone of the tank. A “full tank” state is detected when the full tank sensor reacts and the absolute pressure sensors estimate a level greater than 80%.
    The basic idea of the invention is to pass to several tank position sensors (TPS) to generate respective binary filling signals and to pass to an interpolation, in particular by means of a counter d rinsing or rinsing signal operations. Continuous measurement is therefore no longer carried out via APS, but via TPS and interpolation using rinse counters. A "full tank" state is achieved, for example, by a higher TPS (at the location of the maximum filling quantity, therefore like a TFS) or a TPS placed lower and an interpolation by the
    - 15 rinse counter ("almost full" is recognized, the last authorized rinse operations are counted).
    The invention is based on the observation that the filling level sensors or detectors which provide a binary filling signal (waste water present / not present at the sensor) are practical and reliable. They therefore constitute a reliable basis for determining the filling level. The idea of the invention is to solve the problem of establishing the intermediate levels of wastewater between two digital sensors or measurement points.
    The invention is also based on the idea of a "rinse counter", that is to say a counter for rinse operations. The number of flushing operations is generally known via a CAN bus in the vehicle. Statistically, the amount of wastewater used for rinsing is always about the same. It is thus possible to calculate the filling level from the number of rinses (rinsing operation). In particular, the flushing counter counts the toilet flushes inside the system or the vehicle. Special rinses such as GWDU (Galley Waste Disposai Unit), bidet, ... are weighted according to statistical experience or also counted by corresponding monitoring of separate rinsing generators.
    In particular, the following numbers and the associated measurement positions or filling quantities of sensors are provided: two sensors at 0% or 3%, hereinafter referred to as "0%" and at 100%, three sensors at 0%, 50 / 70% and 100%, four sensors at 0%, 33/40%, 66/80% and 100%, or five sensors at 0%, 25/30%, 50/60%, 75/90% and 100% . The maximum errors for these combinations are 100%, 50%, 33% and 25%. These figures refer to the sensor evaluations at the measurement positions or to the binary filling signals. If we add the amount of inflow or the interpolation between two measurement positions, we obtain for the above variants of two, three, four and five sensors a maximum system error with interpolation of 22%, 11% , 7% and 6%, assuming that the amount of flushing is subject to 22% uncertainty. The measurement positions (sensors, TPS) can be distributed uniformly or arranged according to an accuracy requirement for a certain tank, for example, a full load tank arrangement can be used.
    - 16IJ invention is also based on the idea of a flight attitude correction. Due to the flight attitude (roll and pitch), the orientation of the water or wastewater level relative to the tank and therefore the sensor switching point (TPS, or filling signals, inactive to active) in relation to the filling level changes. In particular, the flight attitude is either sent to the system by the vehicle or detected by a sensor. The geometry of the tank must be known. Thus, the actual filling level can be deduced from the modified sensor signals, even if the flight attitude changes.
    The invention takes account of the following observation: there also occurs, due to the sloshing movements in the tank, a phase during which the sensor or the filling signal (TPS) is switched or not depending on the level of the waves . The signal can be filtered in several ways, for example: a symmetrical filter: more than XX% of the measurements indicate "full" in a time interval. Alternatively, an asymmetric filter: "full" measurements are weighted by X and "not full" measurements are weighted by Y. Therefore, the sensor is considered to be switched if more than XX% of "full" measurements occur in a time interval. This also results in a flight attitude filtering with the same filter or a weighted filter similar to the anti-sloshing filter and the use of the fill level corrected with respect to the flight attitude as a switching point.
    The invention is also based on the idea of a rinse counter interpolation. The filling level can be detected or displayed as follows.
    1. Sensor "A" (for example nominal switching point at 5%) has switched after filtering (sloshing, flight attitude). Therefore, the filling quantity (basic filling quantity) at sensor "A" (at its measurement position) at the average flight attitude is considered as filling level. The rinse counter (amount of inflow) is set to 0.
    2. The flushing counter counts the events (flushing counter = flushing counter + X (X is equal to 1 for a standard toilet flush)). This results in a filling level = basic filling level (= filling level of the TPS-A at average flight attitude) + amount of inflow (rinse counter multiplied by volume
    - 17 rinse). To ensure an increasing monotonic display, the filling level displayed is limited to the value of the next TPS-B (for example nominal switching point at 40%). If necessary, the limit should be corrected for flight attitude.
    3. The TPS-B (eg 40% nominal switching point) has switched after filtering, the procedure continues as described above under 1.
    The invention is also based on the idea that an additional global rinse counter is present in the system to monitor the integrity of the system. The global rinse counter is reset to zero during the waste service (known emptying of the tank, filling level equal to zero). It is monitored that the filling sensors or signals (TPS) switch in the order provided in plausible numbers of flushes (statistical distribution of flush volumes). In addition, the “contaminated sensor” signal is taken into account to ignore a TPS sensor if necessary and / or request cleaning / repair. A “contaminated sensor” signal can be detected either on the signal itself, or by a plausibility check in the system.
    The invention is also based on the idea of a cut-off on a full tank. Switching off on full tank takes place when the sensor or filling signal (TPS) switches to switching point 100% (filling quantity). The shutdown in the event of the filling level not being detected by the TPS 100% due, for example, to undetected faults, extreme contamination or an extreme permanent flight attitude, is ensured by limiting rinsing authorized since the penultimate TPS has been reached (for example TPS 80%). In addition, too early a cut-out is avoided in the event of faulty detection of the filling level with the TPS 100% due, for example, to undetected faults, extreme contamination, by prescribing a minimum number of rinses since T penultimate TPS (for example TPS 80%) became active.
    If the flight attitude is "permanent", so that the TPS 100% switches, for example, to 90% of the actual tank capacity, a certain number of rinses are still authorized before switching off after switching the TPS.
    It follows from the invention a system and a method for continuous filling level measurement based on discrete measurement points.
    - 18 reliable and an interpolation between them due to the influx into the tank and a flight attitude correction.
    Other characteristics, effects and advantages of the invention result from the description below of a preferred embodiment of the invention as well as from the appended figures. Are shown on a schematic drawing of principle:
    Figure 1 a vehicle with a wastewater device according to the invention, Figure 2 the evolution of a filling level over time, Figure 3 different tanks and different distributions of sensors, Figure 4 a tank in different attitudes flight, figure 5 a) a tank with an uneven surface of waste water,
    b) an associated filling signal.
    FIG. 1 shows part of a vehicle 2, here an airplane, namely a wastewater device 4 in the vehicle 2 The wastewater device 4 contains a tank 6, which can be filled with wastewater 8 and which is here filled to a filling level F. The tank 6 is loaded on the vehicle 2. The wastewater device 4 also contains a rinsing generator 10 which is mounted in the vehicle 2. The rinsing generator 10 can be actuated by a rinsing signal S. Each time the rinsing signal S actuates the rinsing generator 10, a rinsing quantity P of waste water 8 is supplied to the tank 6 during a rinsing operation. In the example, the flushing generator 10 is a water tap from a toilet or else a vacuum valve from a suction toilet, the flushing signal S is an actuation signal for flushing from the WC.
    The wastewater device 4 contains a measuring device
    12. The measuring device 12 is used to determine a filling level F of the waste water 8 in the tank 6 on board the vehicle 2. The measuring device 12 contains an evaluation module 14. The evaluation module 14 contains a interface 16 with the rinse generator 10 or with all the rinse generators 10, only one of which is shown by way of example in FIG. 1. The interface 16 serves to receive the respective rinse signals S, with which the generators 10 are ordered. In the evaluation module 14, each flushing signal S is associated with a preset quantity of flushing P of wastewater 8, which is brought to the
    - 19 tank 6 during the flushing operation which was triggered by this flushing signal S.
    In the example, the measuring device 12 also contains four sensors 18a-d which are mounted on the tank 6 at different measuring positions 20a-d. The sensors 18a-d are connected to the evaluation module 14 by signals, that is to say that the corresponding sensor information is available in the evaluation module 14. Each of the sensors 18a-d generates a filling signal respective binary La-d which is transmitted to the evaluation module 14 by the signal link. Each of the filling signals La-d indicates whether waste water 8 is present (active) or not (inactive) at the corresponding measurement position 20a-d on the tank 6. The measurement positions 20a-d differ in that 'They correspond to different quantities of filling Ma-d of the tank 6, that is to say that the sensors 18a-ey are mounted. The filling quantity Ma-d is the quantity of waste water 8 which must be brought to the tank 6 for the corresponding filling signal La-d to go from inactive to active. The respective transition of the filling signal La-d from inactive to active therefore indicates that the current filling level L has just reached the respective filling quantity Ma-d. In the figure, the filling quantities Ma-d are indicated by dotted lines.
    The geometry of the tank and the corresponding filling quantities Ma-d are known. In the evaluation module 14, each filling quantity Ma-d is therefore associated with a corresponding filling signal La-d. The evaluation module 14 is designed to determine the filling level L as the sum of a quantity of base filling B and an amount of inflow Z. The quantity of base filling B is determined using filling signals La-d. The amount of Z influx is determined using the flushing signals
    S. The flushing quantities P and the filling quantities Ma-d are known from the reservoir 6 intended for the measuring device 12 and from the flushing generators 10 conforming to the destination.
    The evaluation module 14 also has an interface 22 for flight attitude data D of the vehicle 2 or for receiving it. The evaluation module 14 is designed to determine the filling level L also according to the flight attitude data D and the known geometry of the tank 6.
    The evaluation module 14 also contains a filter 24 which is designed to filter the filling signals La-d. The filter 24 filters the signal fluctuations in the respective filling signal La-d by inequalities or movements of the surface 26 of the waste water 8. A filling signal La-d filtered accordingly indicates a transition of the value of inactive to active when the actual filling level L reaches the respective filling quantity Ma-d, independently of the movements of waves, sloshing or other surface movements of the wastewater 8.
    In the example of FIG. 1, the sensors 18a-d are arranged at measurement positions 20a-d of the reservoir, the associated filling quantities Ma-d of which are distributed towards the higher filling levels L. The filling quantities are: Ma = 3%, Mb = 50%, Mc = 75% and Md = 100%.
    The following method is implemented with the measuring device 12 or the wastewater device 4:
    The method is used to determine the filling level L of the waste water 8 in the tank 6 on board the vehicle 2. According to the method, the binary filling signal La-d is determined at each of the four measurement positions 20a-d on the tank 6 and indicates whether wastewater 8 is present at the respective measurement position 20a-d in tank 6 (L = active) or not (L = inactive). At the respective measurement positions 20a-d, the associated filling quantities Ma-d of the reservoir 6 are known and different from each other. The filling level L is determined as the sum of the amount of base filling B and the amount of inflow Z. These are determined as follows:
    If none of the filling signals La-d is active, the basic filling quantity B = 0 is chosen. However, the filling signals La, b are active at the filling level L indicated since the corresponding sensors 18a, by detect waste water 8. The filling signals Lc-d are inactive, because no waste water 8 is detected there. by sensors 18c, d. As the filling signals La, b have been determined as active in the process, the associated filling quantities Ma, b are compared. The largest of these filling quantities Ma, b, here the filling quantity Mb of 50%, is chosen as the basic filling quantity B equal to 50%.
    -21 To determine the amount of influx Z, first choose a starting time A.
    Figure 2 shows, by way of example and symbolically over time t, the processes in the wastewater device 4 or in the measurement device 12. The starting time A is the time at which the filling quantity base B in tank 6 is or has been reached. This is the moment when the filling level F has reached the measurement position 20b. The amount of inflow Z is now determined as the sum of all the amounts of rinse P which have been brought to tank 6 since the start time A.
    To do this, all the rinsing operations from the start time A are detected using the respective rinsing signal S and a respective rinsing quantity P is associated with each rinsing operation. In the example of FIG. 2, these are the rinse quantities 2 x PI and P2 The corresponding rinse quantities P are then added to give the amount of inflow Z. To determine the start time A, all the filling signals La-d are monitored to know whether they pass from inactive to active. The time at which one of the filling signals changes from inactive to active is chosen as starting time A.
    As a variant, the instant at which one knows that the tank 6 is emptied is chosen as the starting instant, that is to say where the filling level F is known to become or be equal to zero. This applies in particular in the case where no sensor is placed in the tank 6 for a filling quantity M = 0, which is why a "tank empty" signal is not available in such a situation.
    In the method, a determined filling level F is considered to be unreliable if more than one continuous range of active La-d filling signals and / or more than one continuous range of inactive La-d filling signals are detected for increasing measurement positions, so here in the order 20a-d ("increasing" because the corresponding filling quantities Ma-d increase each time). In the present case, the filling signals La, b are active, that is to say that they form a continuous range in the increasing direction. The fill signals Le, d are inactive and thus also form a continuous range. This means that the filling level F cannot be considered unreliable.
    The filling level F would be inconsistent, for example, if, in the situation shown, the filling signal La was incorrectly inactive. This would then form a first range of inactive flushing signals. Then, a range of active filling signals would follow with the filling signal Lb, then another range of inactive filling signals Le, d. The inactive filling signal ranges would then not be continuous and the determined filling level F would be considered unreliable.
    The determined filling level is also considered to be unreliable if no filling signal is active and the filling level F determined on the basis of the amount of influx Z exceeds the smallest filling amount Ma. As signals active fillers are present, this is not the case. As a variant, the filling level F is not reliable if the amount of influx Z exceeds the difference between the filling quantities associated with the currently lowest inactive filling signal (here Le) and with the currently active filling signal the above (here Lb). The difference would correspond to the amount of wastewater Mc-Mb = 75% - 50% = 25%. In the situation illustrated in FIG. 2, the amount of inflow is Z = 20%, the filling level F is therefore reliable.
    In the example, a certain filling level F, here the actual filling level F = 0, is known with certainty because it is known that the tank 6 has been emptied at a control instant t0. From this instant, an amount of control influx ZK is determined as the sum of all the flushing quantities P which are supplied to the tank 6 from this control instant tO. The FK control fill level is determined as the sum of all the ZK control inflow quantities and the known actual fill level F = 0. Since there is no error, the FK control fill level is equal to the F fill level in Figure 2.
    A full tank would be detected when the determined filling level F or the control level FK reaches the admissible capacity of the tank. This is not yet the case in the example.
    An error is detected if the command level FK exceeds a filling quantity Ma-d which is associated with a filling signal La-d which is currently inactive or if the command level FK falls below a filling quantity Ma-d which is associated with a
    -23 fill signal La-5 d currently active. This is not the case in the example.
    Furthermore, in the method, the second highest filling position, here 20c, in the tank 6 is monitored concerning a transition from an inactive filling signal to an active filling signal, here Le. From such a transition, a minimum number of rinsing operations or rinsing signals S is still authorized independently of the filling signal Ld at the highest measurement position 20d, the number of rinsing signals S authorized being chosen according to the criterion that the sum of the associated flushing quantities P is less than the difference between the maximum filling quantity of the reservoir 6 and the filling quantity of the second highest filling position (here Mc). If, for example, a PI rinse quantity is equal to 5%, then from the filling level F = B = Mc = 75%, 5 rinse operations with PI rinse quantities are still authorized.
    According to FIG. 2, the reservoir 6 is emptied at the instant of control tO, that is to say that it has a known filling level F = FK = FK = B = 0%. As we now know that the tank 6 is empty from this moment, the start time A is chosen here. At each of the instants indicated by dashes, a respective flushing signal S and a corresponding supply of wastewater 8 take place in the tank 6, a respective flushing quantity PI or P2> P1 being supplied to the tank. The PI rinse quantities are brought in by a sink and the P2 rinse quantities by a toilet flush. These are added in a respective influx amount Z, which results in a filling level F = Z, since B = 0.
    At an instant t1, the filling level (after a single supply of PI) reaches the filling level Ma = 3%, that is to say the measurement position 20a on the tank on which the sensor 18a is mounted. Fe corresponding filling signal Fa goes from inactive to active. At the instant tl, the basic filling quantity B is therefore set to the filling quantity Ma, the inflow quantity Z is again chosen equal to 0 and the instant tl is chosen as the new starting instant A. A respective amount of inflow Z therefore results again from the addition of the rinse amounts P associated with the rinse signals S. The amount of inflow Z then begins to increase again until the filling level F reaches the filling quantity Mb. With other
    -24 rinse signals S, the reservoir 6 continues to fill, which results in an increase in Z and filling levels F = Ma + Z.
    The filling level F reaches the filling quantity Mb at the time t2. Now, the basic filling quantity B is set to Mb, the influx quantity Z again chosen equal to 0 and a new starting instant A is chosen at t2. Now, three flushing signals S with the quantities PI, PI and P2 are still generated until the current time t3 of the current consideration according to FIG. 1. The amount of inflow Z is therefore the sum of PI + PI + P2 and is added to the basic quantity B = Mb, which ultimately leads to the current filling level F = Mb + Z.
    FIG. 3 shows by way of example different arrangements of sensors 18a-e at the measurement positions 20a-e of different tanks 6. According to FIG. 3a, 5 sensors 18a-d are distributed uniformly at filling quantities Ma-e = 0%, 25%, 50%, 75% and 100%. FIG. 3a shows in a variant the arrangement of three sensors 18a, c, e distributed uniformly at Ma, c, e = 0%, 50% and 100%. The four sensors illustrated in FIG. 3b are distributed uniformly at Ma-d = 0%, 33%, 66% and 100%. FIG. 3c shows four sensors 18a-d at measurement positions 20a-d whose associated filling quantities Ma-d are distributed asymmetrically towards the higher filling levels, that is to say at 25%, 50%, 85% and 95%.
    FIG. 4 shows only by way of example how the flight attitude data D contribute to the determination of the filling level F, here a basic filling quantity B. In FIG. 4a, the vehicle 2 and therefore the tank 6 are oriented horizontally. The moment of transition of the upper sensor signal or the filling signal Lb from inactive to active for a certain filling level F, for example F = Mb = 100 liters, is shown here. The corresponding basic filling quantity B = 100 liters is thus determined. The transition from the filling signal from inactive to active is symbolized by an arrow.
    FIG. 4b shows the same situation with a modified flight attitude (tilt) of the vehicle 2 and therefore of the tank 6. Here too, the filling level of 100 liters has just been reached. Due to the inclination, only the lower sensor 18a reacts, that is to say that the filling signal La becomes active. As the flight attitude data D is taken into account, the evaluation module knows the modified filling quantities M 'which are now associated with the signals of
    -25filling L. Here too, the filling level F = B = 100 liters is determined because of the filling quantity Ma '= 100 liters.
    FIG. 5 shows the effect of a filter 24 on the associated filling signal L on the uneven surface 26 of the wastewater 8. Due to the waves or sloshing movements of the wastewater 8 as shown in FIG. 5a, filling signal L delivers signal values which change continuously over time t as indicated in FIG. 5b: inactive ("0"), active ("1"), inactive, active, ... The average filling level F (waste water 8 in the case of a flat surface 26) is indicated by dotted lines and is located below the measurement position 20 at which the sensor 18 changes from active to inactive.
    A corresponding filter 24 filters the corresponding wave movements, so that the filtered filling signal L '(indicated in dotted lines) reflects a state which corresponds to the actual filling quantity in the tank 6, here an inactive signal, since the level waste water in the tank 6 is still below the measuring position 20.
    The objects, elements, parts, components, parameters, quantities, devices or the like represented in relation to the invention in the appended figures are referenced as follows:
    : vehicle: wastewater device: tank: wastewater: flushing generator: measuring device: evaluation module: interface (flushing signal)
    18a-e: sensor
    20a-e: measurement position: interface (flight attitude data): filter: surface (wastewater)
    F: filling level: rinse signal
    La-e: filling signal
    P: amount of rinse
    Ma-d: filling quantity
    -2610
    B: basic filling quantity
    Z: amount of influx
    D: flight attitude data
    A: start time
    ZK: amount of control inflow tO: control instant
    FK: control filling level
    T: time tl, 2: instant
    Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. Method for determining a filling level (F) of waste water (8) in a tank (6) on board a vehicle (2), in which a respective rinse quantity (P) of waste water ( 8) is brought to the reservoir (6) by rinsing operations, characterized in that
    - a binary filling signal (La-e) is determined at at least two different measurement positions (20a-e) on the tank (6), which indicates whether wastewater (8) is present there or not, the quantities filling (Ma-e) of the reservoir (6) associated with the measurement positions (20ae) being known and different,
    - the filling level (F) is determined as the sum of a basic filling quantity (B) and an inflow quantity (Z),
    - if none of the filling signals (La-e) is active: the basic filling quantity (B) is chosen equal to zero, and
    - otherwise all the currently active filling signals (La-e) and the associated filling quantities (Ma-e) are determined and the largest of the determined filling quantities (Ma-e) is chosen as the basic filling quantity ( B), and
    - to determine the amount of inflow (Z), we choose a start time (A) as the time when the amount of base filling (B) in the tank (6) is reached,
    - the amount of inflow (Z) is determined as the sum of all the flushing quantities (P) which are brought to the tank (6) from the start time (A).
    [2" id="c-fr-0002]
    2. Method according to claim 1, characterized in that to determine the rinsing quantities (P), which add up to form the amount of inflow (Z), all the rinsing operations are detected from the moment start (A) and a preset rinse amount (P) is associated with each rinse operation.
    [3" id="c-fr-0003]
    3. Method according to one of the preceding claims, characterized in that to determine the start time (A), all the filling signals (La-e) are monitored to know whether they are going from inactive to active, and the starting time (A) is either determined as the time
    -28when we know that the tank (6) is emptied, is chosen as the instant at which one of the filling signals (La-e) goes from inactive to active.
    [4" id="c-fr-0004]
    4. Method according to one of the preceding claims, characterized in that the determined filling level (F) is considered to be unreliable if more than one continuous range of active filling signals (La-e) and / or more d a continuous range of inactive fill signals (Lae) are detected for increasing measurement positions (20a-e).
    [5" id="c-fr-0005]
    5. Method according to one of the preceding claims, characterized in that the determined filling level (F) is considered to be unreliable
    - if no filling signal (La-d) is active: if the filling level (F) exceeds the smallest filling quantity (Ma-d),
    - otherwise: if the determined influx quantity (Z) exceeds the difference between the filling quantities (Ma-d) associated with the lowest currently inactive filling signal (La-e) and the filling signal (La-e ) currently active highest.
    [6" id="c-fr-0006]
    6. Method according to one of the preceding claims, characterized in that in the case where a filling level (F) is known as the actual filling level, an amount of control influx (ZK) is additionally determined from of this control instant (tO) as the sum of all the flushing quantities (P) which are brought to the tank (6) from this control instant (tO), and a control filling level (FK) is determined as the sum of the known actual filling level and the amount of control inflow (ZK).
    [7" id="c-fr-0007]
    7. Method according to claim 6, characterized in that
    - a full tank (6) is detected when the determined filling level (F) or the control filling level (FK) reaches the admissible capacity of the tank, and / or
    - an error is detected if the control filling level (FK) exceeds a filling quantity (Ma-d) which is associated with a filling signal (La-d) currently inactive or if the control filling level (FK) ) falls below a filling amount (Ma-d) which is associated with a currently active filling signal (La-d).
    [8" id="c-fr-0008]
    8. Method according to one of the preceding claims, characterized in that
    -29- the second highest measurement position (20a-e) in the tank (6) is monitored for a transition from an inactive filling signal (La-e) to an active filling signal (La-e) ,
    - from such a transition, a minimum number of rinsing operations is still authorized, regardless of the filling signal (La-e) at the highest measurement position (20a-e), the minimum number being chosen according to the criterion that the sum of the associated flushing quantities (P) is less than the difference between the maximum filling quantity of the reservoir (6) and the filling quantity (Ma-e) of the second highest filling position.
    [9" id="c-fr-0009]
    9. Measuring device (12) for determining a filling level (F) of waste water (8) in a tank (6) on board a vehicle (2), the vehicle (2) containing at least one generator which can be activated by a rinse signal (S) and a respective rinse quantity (P) of waste water (8) being supplied to the tank (6) each time the rinse generator (10) is activated during a rinsing operation,
    - with an evaluation module (14), characterized in that
    - the evaluation module (14) has an interface (16) with at least one of the rinsing generators (10) for receiving the respective rinsing signals (S),
    - in which evaluation module (14) a preset quantity of rinse (Ma-e) of waste water (8) is associated with each rinse signal (S),
    - the measuring device (12) comprises at least two sensors (18a-e) which can be mounted on the tank (6) at different measurement positions (20a-e) to generate the filling signals (La-e) which are connected by signals to the evaluation module (14),
    - in which the evaluation module (14) a binary filling signal (La-e) is present for each of the sensors (18a-e), which indicates whether wastewater (8) is present there or not,
    - in which the evaluation module (14) a known filling quantity (Ma-e) of the reservoir (6) is associated with each filling signal (La-e),
    - the evaluation module (14) being designed to determine the filling level (F) as the sum of a filling quantity
    -30base (B) and an amount of inflow (Z) according to a method according to one of claims 1 to 8, the amount of base filling (B) being determined from the filling signals (La- d) and the amount of inflow (Z) from the flushing signals (S).
    [10" id="c-fr-0010]
    10. Measuring device (12) according to claim 9, characterized in that the rinsing quantities (P) and the filling quantities (Ma-e) are known from a reservoir (6) and a generator rinse (10) according to the destination of the measuring device (12).
    [11" id="c-fr-0011]
    11. Measuring device (12) according to one of claims 9 to
    10, characterized in that the evaluation module (14) has an interface for flight attitude data (D) of the vehicle (2) in the form of an airplane and the evaluation module (14) is designed to determine the filling level (F) also as a function of the flight attitude data (D) and of a known geometry of a tank (6) conforming to the destination.
    [12" id="c-fr-0012]
    12. Measuring device (12) according to one of claims 9 to
    11, characterized in that the evaluation module (14) contains a filter (24) which is designed to filter the filling signals (La-e) with regard to the unevenness of a surface (26) of waste water (8) in the tank (6).
    [13" id="c-fr-0013]
    13. Waste water device (4) for a vehicle (2), comprising a tank (6) which can be filled with waste water (8) intended to be loaded on the vehicle (2), at least one rinsing generator (10) being able to be mounted in the vehicle (2) and actuated by a flushing signal (S), a quantity of flushing (P) of waste water (8) being supplied to the tank (6) each time the generator flushing device (10) is actuated during a flushing operation, characterized in that the waste water device (4) contains a measuring device (12) according to one of claims 9 to 12.
    [14" id="c-fr-0014]
    14. Wastewater device (4) according to claim 13, characterized in that
    - the sensors (18a-e) are arranged at measurement positions (20a-e) of the reservoir (6) which correspond to filling quantities (Ma-e) uniformly distributed in the reservoir (6), or
    - the sensors (18a-e) are arranged at measurement positions (20a-e) of the tank (6) including the associated filling quantities (Ma-e)
    -31 are distributed asymmetrically towards the upper filling levels (F).
    [15" id="c-fr-0015]
    15. Method according to one of claims 1 to 8, characterized in that it is implemented using a measuring device (12) according to one
    5 of claims 9 to 12 and / or using a waste water device (4) according to one of claims 13 to 14.
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    同族专利:
    公开号 | 公开日
    DE102017005626B4|2019-01-31|
    CA3006688A1|2018-12-14|
    DE102017005626A1|2018-12-20|
    US11112291B2|2021-09-07|
    US20180364088A1|2018-12-20|
    FR3067807B1|2021-05-07|
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    法律状态:
    2020-06-19| PLFP| Fee payment|Year of fee payment: 3 |
    2020-09-04| PLSC| Publication of the preliminary search report|Effective date: 20200904 |
    2021-06-22| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017005626.9|2017-06-14|
    DE102017005626.9A|DE102017005626B4|2017-06-14|2017-06-14|Determination of a waste water level in a vehicle tank, measuring arrangement and wastewater arrangement|
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