• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a dispensing device and a method for dispensing liquids (1), in particular liquid medicaments to persons, comprising - a container (2) filled with the liquid (1), which at one end has an opening (3) for dispensing the In which it is provided that holding means (4) for holding a penetration needle for injecting the liquid (1) located in the container (2) are provided in the region of the opening (3); a measuring system (5) for in particular capacitive, determination of a measured value (M), and - a processing unit (13) for determining at least one physical or chemical parameter value (P), in particular the fill level, associated with the container (2) or the liquid (1) contained therein based on the measured value (M). According to the invention, provision is made for - at least one detection element (6) to be provided in the region of the opening (3), - for a needle detection circuit (8) to be present, the detection element (6) being connected to the needle detection circuit (8), the needle detection circuit (8) is designed to measure an electrical parameter, in particular the inductance, capacitance or conductivity, that can be tapped off at the output of the detection element (6), that a processing unit (13) is present, and that is present at the output of the needle detection circuit (8) Measurement result as a detection result (C) of the processing unit (13) is supplied, and - that the processing unit (13) calculates the parameter (P) in dependence on the measured value (M) and the detection result (C) and at its output.
    公开号:AT516283A4
    申请号:T50058/2015
    申请日:2015-01-28
    公开日:2016-04-15
    发明作者:Gernot Dipl Ing Schmid；Manfred Bammer；Rene Hirtl；Robert Lurf；Michael Meindl；Martin Beisteiner
    申请人:Seibersdorf Labor Gmbh；Ait Austrian Inst Technology；
    IPC主号:
    专利说明:

    The invention relates to a method for determining a physical or chemical parameter associated with a container or a liquid in the container, in particular the level of the liquid in the container according to the preamble of claim 18.
    Various dispensers and methods for determining levels in dispensers or other parameters related to the liquid in the container based on capacitive detection are known in the art. A major drawback of all these methods is that the use of a conductive or metallic hypodermic needle for administering the respective fluid influences the measurements based on capacitive measurement principles, so that different measurement results exist depending on whether an injection needle is placed on the dispenser or not.
    The invention has for its object zuschaffen a dispensing device and a method that overcomes these disadvantages.
    The invention solves this problem in a dispenser of the type mentioned above with the characterizing features of claim 1.
    The invention provides in a dispensing device for dispensing liquids, in particular liquid medicines, to persons, comprising a container filled with the liquid and having an opening for discharging the liquid at one end, wherein holding means for holding an injection needle are provided in the region of the opening a measuring system for, in particular capacitive, determination of a measured value, and a processing unit for determining at least one physical or chemical parameter value associated with the container or the liquid therein, in particular the filling level, on the basis of the measured value in that - at least one detection element is present in the region of the opening, - that a needle detection circuit is present, the detection element being connected to the needle detection circuit, - that the needle detection section switches ng to measure one at the output of the
    Detection element tapped electrical characteristic, in particular the inductance, capacitance or conductivity, is formed, - that a processing unit is present, and that at the output of the
    The detection result is supplied to the processing unit, and in that the processing unit calculates the parameter as a function of the measured value and the detection result and keeps it at its output.
    In this case, it is advantageously achieved that the electrical influence of a metallic or conductive injection needle on the measurement result is largely eliminated.
    One way of compensating for the influence of a metallic or conductive hypodermic needle on the measurement result is for the processing unit to compare the detection result supplied to it with a predetermined threshold, and to calculate the output parameter value based on the measurement using the calculation rule used to calculate the parameter value determined depending on the result of the comparison of the detection result with the predetermined threshold value.
    A simple procedure for the numerical description and correction of the influence of a metallic or conductive injection needle on the measurement result provides that a first calibration function is stored in the processing unit, which determines the relationship between the measured value and the physical or chemical parameter value associated with the container or the liquid therein in the presence of a hypodermic needle in the holding means indicates that a second calibration function is stored in the processing unit indicating the relationship between the reading and the physical or chemical parameter value associated with the container or liquid therein in the absence of an injection needle in the holding means; the processing unit uses the calibration function used for the calculation of the parameter as a function of the comparison of the detection result with the predetermined threshold value.
    Alternatively, it can be provided that the processing unit comprises a first unit and a second unit, that a first calibration function is stored in the first unit, which determines the relationship between the measured value and the physical or physical fluid associated with the container or the liquid therein indicates a chemical parameter value in the presence of an injection needle in the holding means, the first unit applying the first calibration function to the reading applied to it and providing the result thus obtained at its output as the first parameter value, and storing in the second unit a second calibration function indicating the relationship between the measured value and the physical or chemical parameter value associated with the container or the liquid therein in the absence of an injection needle in the holding means, the second unit indicating the second calibration function a applies the measured value applied to it and the resulting result is available at its output as the second parameter value.
    In this case, it is advantageously provided that the processing unit has a first parameter for determining a first parameter value, which applies a first calculation rule, which on the basis of the measured value the parameter value in the presence of the injection needle in the holding means applies to the measured value, that the processing unit has a second unit for determining a second parameter value, which applies a second calculation rule, which on the basis of the measured value provides the parameter in the absence of the injection needle in the holding means, to the measured value, and - that the processing unit compares the detection result supplied with it with a predetermined threshold and, depending on this comparison, either that of the first unit or the first or second parameter determined by the second unit as a parameter at its output.
    A particularly simple and advantageous compensation of the capacitive influence of the injection needle on the advantageous capacitive determination of measured values can be provided by connecting at least one pair of measuring electrodes arranged in the outer region, in particular adjacent to the wall of the container, for determining the capacitance tapped between the measuring electrodes and this capacitance measurement value supplied as a measured value of the processing unit.
    In order to avoid a falsification of the measurement result by external fields or contacts of the measuring electrodes by the measuring end, it can be provided that, in particular, at least one further metal structure surrounding the measuring electrodes is present, and preferably at least one of the metal structures is designed as an electrical screen.
    In order to ensure rapid and reliable detection of the presence or absence of an injection needle while at the same time being of simple mechanical construction, it can be provided that the attachable cap completely surrounds the area of the dispenser located on the side of the opening or at least partially surrounds one or more of the holding needle Recess, through which at least one injection needle held by the holding means projects, that the detection element is arranged on or in the attachable cap in the region of the holding means or in the region of the injection needle, and in particular that the measuring system and the needle detection circuit are integrated in the attachable cap.
    Preferred embodiments, in which the detection of the injection needle takes place by a capacitance measurement, provide that the detection element is designed as a conductive detection electrode arranged in the region of the opening, that the detection electrode is electrically coupled to a needle detection circuit.
    In particular, it may be provided that acts as a metallic structure at least one of the measuring electrodes of the measuring system.
    A particularly preferred possibility of detecting the presence of a hypodermic needle by capacitance measurement provides that the detection electrode and, if appropriate, the metallic structure, in particular in the form of a further detection electrode, are arranged in or on the attachable cap in the region of the holding means or in the region of the injection needle, and / or - that the detection electrode and optionally the metallic structure, in particular in the form of a further detection electrode, in the region of the holding means for the injection needle on the outer wall of the container are arranged, and / or - that the detection electrode and optionally the metallic structure, in particular in the form of further detection electrode, in the region of the holding means for the injection needle in the outer region of the dispensing device, spaced from the container are arranged.
    Another simple detection of an injection needle provides that the detection element is formed by a switch, that the needle detection circuit is designed to measure the electrical conductivity between the contacts of the switch, that the switch is mechanically actuated by the presence of an injection needle, and Switch is electrically coupled to the processing unit.
    In this case, it is advantageous for the detection if, as a result of the actuation of the switch, the threshold value comparator of the processing unit is supplied via the switch with an electrical signal as a detection result.
    Alternatively, the presence of an injection needle can also be determined inductively, in particular by - that the detection element is formed by a conductor arrangement or coil whose inductance in the presence of an injection needle has a different value, as in the absence of the injection needle, that the conductor arrangement or coil electrically the needle detection circuit formed as an inductance measuring circuit is coupled, that the needle detection circuit for measuring the inductance of the conductor arrangement or coil is provided, wherein the detection result applied to the output of the needle detection circuit is supplied in the form of an inductance measurement to the processing unit, the processing unit calculates the parameter depending on the measurement result and the detection result and at its output, in particular - the conductor arrangement or coil in the region of the holding means for the injection needle the outer wall of the container are arranged, or - that the conductor arrangement or coil in the region of the holding means for the injection needle in the outer region of the dispensing device, are arranged spaced from the container.
    Advantageous arrangements of the coils provide that the coil is arranged such that in the presence of the injection needle, this is at least partially wrapped by the turns of the coil.
    It can also be provided that the conductor arrangement or coil are arranged in or on the attachable cap in the region of the holding means or in the region of the injection needle, wherein in particular the coil is arranged such that in the presence of the injection needle and attached to the dispenser cap, the injection needle of the Windings of the coil is at least partially wrapped.
    Furthermore, the presence of an injection needle can be determined by forming the detection element by two contact elements which are in electrical contact with it in the presence of an electrically conductive injection needle, in particular via the electrical connection between the contact elements and the electrically conductive needle, an electrical signal to the threshold value comparator of the processing unit Detection result is supplied.
    It is of particular hygienic advantage in the detection of the injection needle when - on a non-detachably connected to the injection needle holding part an electrically conductive coating is present, and - two detection elements are provided in the form of contact elements in the presence of an injection needle with the electrically conductive coating in electrical contact wherein, in particular-via the electrical connection between the contact elements and the electrically conductive coating, the threshold value comparator of the processing unit an electrical signal is supplied as a detection result, and / or - the contact elements are arranged in or on the attachable cap in the region of the holding means or in the region of the injection needle.
    Furthermore, according to the invention, in a method for determining a physical or chemical parameter associated with a container or liquid in the container, in particular the level of the liquid in the container, the container having an opening for dispensing the liquid at one end, and wherein Holding means for holding a hypodermic needle for injecting the liquid in the container are provided, and - wherein a measured value in the region of the container is determined, provided - that by means of a detection element located in the opening of the presence of an injection needle dependent detection result, is determined in particular by determining the capacitance between a metallic detection electrode located in the region of the opening and a further metallic structure arranged in or on the delivery device, that the detection energy comparing the presence or absence of a hypodermic needle in the retention means, wherein upon detection of the presence of a hypodermic needle, a first parameter is obtained by applying a first calculation rule which, based on the measurement, provides the parameter value in the presence of the hypodermic needle in the retaining means; is applied to the measured value, and the thus-determined first parameter value is provided as a parameter value, and - upon detection of the absence of a hypodermic needle, applying a second parameter value to the measured value by applying a second calculation rule which, based on the measured value, supplies the parameter value in the absence of the injection needle in the holding means and the second parameter thus obtained is maintained as a parameter value.
    This provides a simple way of determining a physical parameter associated with the liquid in the container without being adversely affected by the presence or absence of the injection needle.
    A simple procedure for the numerical description and correction of the influence of a metallic or conductive or magnetically active injection needle on the measurement result provides that a first calibration function is specified, which determines the relationship between the measured value and the physical or chemical associated with the container or the liquid therein Parameter value in the presence of an injection needle in the holding means indicates that a second calibration function is specified which indicates the relationship between the measured value and the physical or chemical parameter value associated with the container or the liquid therein in the absence of an injection needle in the holding means; The first calibrating function is applied to the measured value and the result thus obtained is made available as a parameter, and that at Detekti On the basis of the absence of an injection needle, the second calibration function is applied to the measured value and the result thus obtained is made available as a parameter value.
    In order to obtain a value which is particularly easy to detect electrically, it can be provided that the tapped capacitance is taken as the measured value between two measuring electrodes arranged in the outer region, in particular on the wall of the container.
    Several preferred embodiments of the invention are further illustrated by the following drawing figures:
    Fig. 1 shows a first embodiment of a dispenser according to the invention from the side. Fig. 2 shows a section through the embodiment of the invention shown in Fig. 1 along the cutting edge A-A. Fig. 3 shows a dispenser according to a second embodiment of the invention. 4 shows a section through the embodiment of the invention shown in FIG. 3 along the cut edge B-B. Fig. 5 shows a third embodiment of a dispenser according to the invention from the side. Figure 6 shows a section through the embodiment of the invention shown in Figure 5 along the cutting edge C-C. Fig. 7 shows a fourth embodiment of a dispenser according to the invention from the side. Fig. 8 shows a section through the embodiment of the invention shown in Fig. 7 along the cutting edge D-D. Fig. 9 shows a fifth embodiment of a dispenser according to the invention from the side. Fig. 10 shows a section through the embodiment of the invention shown in Fig. 9 along the cutting edge E-E. Fig. 11 shows a sixth embodiment of a dispenser according to the invention from the side. Fig. 12 shows a section through the embodiment of the invention shown in Fig. 11 along the cutting edge F-F.Fig. Figure 13 shows a seventh embodiment of a delivery device according to the invention from the side. Fig. 14 shows a section through the embodiment of the invention shown in Fig. 13 along the section line G-G. FIG. 15 shows an eighth embodiment of a dispenser according to the invention from the side. FIG. Fig. 16 shows a section through the embodiment of the invention shown in Fig. 15 along the cutting edge H-H. Fig. 17 shows schematically the interconnection of the measuring system of the processing unit and the measuring circuit. Fig. 18 shows the processing unit shown in Fig. 17 in detail. Fig. 19 schematically shows an alternative circuit of the measuring system of the processing unit and the measuring circuit. Fig. 20 shows an alternative embodiment of the processing unit. Figs. 21 to 23 show alternative embodiments in which the presence of an injection needle is detectable by changing a conductivity. Figures 24 through 26 show further alternative embodiments with inductive detection.
    In Fig. 1, a first embodiment of a dispensing device according to the invention for dispensing liquids 1 is shown. This liquid 1 is contained in a container 2 having at one end an opening 3 for dispensing the liquid. It is provided that in the region of the opening 3 holding means 4 are provided for holding an injection needle 4a. The injection needle 4 a serves to inject the liquid 1 in the container 2.
    In the context of the invention, a holding means 4 for holding the injection needle 4 a may serve all the required units of the dispensing device which hold the injection needle 4 a in its position opposite the opening 3 of the container 2. This can be, in particular, a septum 40 which can be pierced by means of an injection needle 4 and which is arranged in the opening 3 of the container 2 and closes the latter otherwise. As a holding means 4, a combination of an external thread in the region of the opening can also act with an internally threaded holding part 41 fixedly connected to the injection needle 4a, by means of which the injection needle 4a is held in its position.
    1 also shows two measuring electrodes 9, 10 of a measuring arrangement 5a, by means of which a measured value M (FIG. 17) can be determined in the region of the container 2. Due to this measured value M, it is in principle possible to connect with the container 2 or the container to determine the physical or chemical parameters P contained therein. Preferably, such a parameter P is the level of the liquid 1 in the container 2. Alternatively, it is also possible to determine the type of liquid itself, its temperature, pressure or similar values due to a capacitive or other sensory measurement in the region of the container 2 ,
    The interconnection shown in Figure 17 as well as the individual components are all located on the dispenser. A measuring system 5 is connected to the two measuring electrodes 9, 10. The output of the system is a measurement Man, on the basis of which the physical or chemical parameter P can be determined.
    In order to avoid a falsification of measurement results, which is caused by physical contact of the dispenser from the outside, a shield 11 is preferably provided in the present embodiment, which is outside the two measuring electrodes 9, 10 and surrounds them and the container 2.
    In the present embodiment, a detector element 6 in the form of a detection electrode 6 is arranged on the container 2. As can be seen from Fig. 1, the detection electrode 6 is a metallic plate or loop disposed between the container 2 and the housing wall, which serves as a capacitive electrode. The detection electrode 6 is connected to a needle detection circuit 8 in the form of a capacitance measuring circuit 8, as shown in FIG. The second terminal of the capacitance measuring circuit 8 can be connected to a metallic structure 7, in particular to one of the measuring electrodes 9, 10, the shield 11, the mass of the measuring system 5 or a further detection electrode 7 (FIGS. 3 and 19, respectively). In the embodiment shown in Fig. 17, the second terminal of the capacitance measuring circuit 8 is electrically connected to the shield 11. If an injection needle 4a is present in the region of the holding means 4 in the region of the opening 3, a detection result in the form of a capacitance measurement C is determined between the detection electrode 6 and the shield 11. If the injection needle 4 a is removed from the holding means 4, the capacitance measuring circuit 8 determines a different capacitance measurement result C. Depending on the capacitance measurement result C available at the output of the capacity measuring circuit 8, it is possible to recognize whether or not the injection needle 4a in the holding means 4 is in the region of the opening 3. This can advantageously be determined by means of a threshold comparison, wherein the threshold value T is set just between a predetermined capacity in the presence of the injection needle 4a and a different and previously determined capacity in the absence of the injection needle 4a.
    Both the measured value M and the capacitance measurement result C are supplied to a processing unit 13.
    The processing unit 13, in a concrete embodiment illustrated in detail in FIG. 18, has a threshold comparator 18. The capacitance measurement result C is fed to the threshold comparator 18, which makes a statement as to whether the capacitance measurement result exceeds or falls below this threshold value T, on the basis of the predetermined threshold value T. On the basis of the comparison of the threshold value T with the capacitance measurement result C, it is possible to determine whether a
    Injection needle 4a is located in the holding means 4 or not. The comparison value V is kept available at the output of the threshold comparator 18.
    In the embodiment illustrated in FIG. 18, the processing unit 13 furthermore has two units 14, 15 to which the measured value M is fed in each case. The processing unit 13 has a first unit 14 for determining a first parameter value P1 and a second unit 15 for determining a second parameter value P2.
    Depending on whether or not the injection needle 4a is inserted in the holding means 4, the calculation of the parameter P on the basis of the measured value M is made according to different calculation rules. There is a first calculation rule, which supplies the parameter P in the presence of the injection needle 4a in the holding means 4 on the basis of the measured value M. There is a second calculation rule which, on the basis of the measured value M, supplies the parameter P in the case of the absence of the injection needle 4a in the holding means 4. Based on the measured value M, two parameter values P1, P2 are determined, from which the first parameter value P1 after the first calculation rule and the second parameter value P2 are formed according to the second calculation rule.
    The two calculation rules are executed in the two units 14, 15. The first unit 14 executes the first calculation rule. At its output is the first parameter value P1, which correctly reproduces the parameter P when the injection needle 4a is in the holding means 4. The second unit 15 executes the second calculation rule. At its output is the second parameter value P2, which correctly reproduces the parameter P when the injection needle 4a is not in the holding means 4 or the holding means 4 are free of an injection needle 4a.
    The two parameter values P1 and P2 are fed to a selection unit 17. In order to control the selection unit 17, the comparison value V of the threshold value comparator 18 which is dependent on the capacitance measurement value C is used.
    If an injection needle 4a is present in the holding means 4, the first parameter value P1 is made available as the parameter P at the output of the comparison unit 13 or the selection unit 17, otherwise the second parameter value P2 is made available at the output of the processing unit 13 as parameter P.
    Particularly advantageously, calibration functions F1, F2 can be stored both in the first unit 14 and in the second unit 15, the respective first and / or second calculation instructions being related to the measured value M and the physical value associated with the container or the liquid therein and chemical parameter value P in the presence or absence of an injection needle 4a in the holding means 4.
    The first unit 14 applies the first calibration function F1 to the measured value M applied to it. The result thus obtained is provided at its output as the first parameter value P1. The second unit 15 applies the second calibration function F2 to the measured value M applied to it. The result obtained in this way makes it available at its output as the second parameter value P2.
    As an alternative to the embodiment of the processing unit 13 shown in FIG. 18, the embodiment of the processing unit 13 shown in FIG. 20 is also possible. In this embodiment, the processing unit 13 comprises only one computing unit 140, as well as a memory 150, which holds two different calibration functions F1 and F2. According to FIG. 20, the calculation unit 140 is supplied with the respectively suitable calibration function as a function of the threshold value comparison result V. Upon feeding the calibration function F1, a parameter value is calculated by the calculation unit 140 and made available at the output of the processing unit 13, which correctly reproduces the parameter P when an injection needle 4a is present in the holding means 4. When the calibration function F2 is supplied, the calculation unit 140 calculates a parameter value and makes it available at the output of the processing unit 13, which correctly reproduces the parameter P if there is no injection needle 4a in the holding means 4.
    In this, in the region of the opening 3 two mutually opposite to the opening detection electrodes 6, 7 are provided, due to the capacitance C between these two detection electrodes 6, 7, the presence or Absence of an injection needle 4a in the holding means 4 in the region of the opening 3 are detected. Otherwise, this embodiment corresponds to the first embodiment of the invention. The concrete arrangement of the individual components used for the measurement corresponds to the arrangement of the first embodiment of the invention shown in FIG. 17 with the difference shown in FIG. 19 in that both detection electrodes 6, 7 are connected to the measuring system 5.
    The third embodiment of the invention shown in FIGS. 5 and 6 substantially corresponds to the first embodiment of the invention shown in FIGS. 1 and 2.
    The essential difference is that the detection electrode 6 is arranged at a distance from the container 2 in the outer region of the delivery device. The detection electrode 6 is formed in the form of an electrode ring arranged in the outer region of the container 2. As with the first embodiment of the invention, it is possible to connect to the second input of the capacitance measuring circuit 8, one of the measuring electrodes 9, 10, the shield 11, the mass of the measuring system 5 or another metallic structure.
    The fourth embodiment of the invention illustrated in Figures 7 and 8 substantially corresponds to the second embodiment of the invention shown in Figures 3 and 4. The essential difference between the second and fourth embodiments of the invention lies in the fact that the two detection electrodes 6, 7 are arranged at a distance from the container 2 in the outer region of the dispensing device.
    Figs. 9 and 10 show in detail a fifth embodiment of the invention which corresponds to the first embodiment of the invention except for the differences shown below. The dispenser has a cap 16. In this cap 16 may optionally be provided a shield 11. The detection electrode 6 is located in the front region of the cap 16, which completely surrounds the needle 4 in the present case. As in the first and third embodiments of the invention, a capacitance can be made between the detection electrode 6 and another metallic structure 7, 9, 10, 11, in particular one of the measuring electrodes 9, 10 of the shield 11 or the mass of the measuring system.
    The sixth embodiment of the invention shown in Figs. 11 and 12 corresponds to the second and fourth embodiments of the invention shown in Figs. 3 and 4, in which, unlike the latter, the two detection electrodes are disposed inside the cap 16. In this cap 16 may optionally be provided a shield 11. The detection electrodes 6, 7 are located in the front region of the cap 16, and face each other in the region of the injection needle 4a.
    In a seventh embodiment of the invention shown in Figs. 13 and 14 which substantially corresponds to the fifth embodiment of the invention, the cap 16 has a recess 19 through which the injection needle 4a passes. The detection electrode 6 is annularly formed in the inner end portion of the cap 16 and surrounds the recess 19 penetrated by the injection needle 4a.
    An eighth embodiment of the invention is shown in Figs. 15 and 16, which substantially corresponds to the sixth embodiment of the invention. In this case, a recess 19 is provided in the cap 16 through which the injection needle 4 can pass. The two detection electrodes 6, 7 are located in the region of the recess 19 provided for the injection needle 4a.
    Fig. 21 shows an alternative ninth embodiment of the invention, which substantially corresponds to the sixth embodiment of the invention. However, the detection of the presence or absence of the injection needle 4a in this case does not take place via two capacitive electrodes but via two electrodes 6, 7 projecting from a common base 16a arranged on the cap 16 in the direction of the injection needle 4a. If an electrically conductive injection needle 4a is present, this closes the contact between the two electrodes 6, 7. The needle detection circuit 8, which in this case measures the conductivity between the two electrodes 6, 7, detects a conductivity between the electrodes 6 in the presence of an injection needle 4a, 7, in the absence of the injection needle 4a, no conductivity is detected. The conductivity is held as a detection result C at the output of the needle detection circuit 8.
    Fig. 22 shows a tenth embodiment of the invention, which substantially corresponds to the ninth embodiment of the invention. Also, as a holding means 4, a combination of an external thread in the region of the opening is used with a holding part 41 with an internal thread firmly connected to the injection needle 4a, by means of which the injection needle 4a is held in its position. In the outer region of the female thread-carrying holding part, a conductive layer is arranged.
    From the inner area of the cap 16 or from a base body connected to the cap, there are two measuring electrodes 6, 7. If an electrically conductive injection needle 4a is present, there is also a conductive contact between the measuring electrodes 6, 7 with the conductive layer arranged on the holding part. Conductive layer thus closes the contact between the two electrodes 6, 7.
    The needle detection circuit 8, which in this case measures the conductivity between the two electrodes 6, 7, detects conductivity between the electrodes 6, 7 in the presence of an injection needle 4a, whereas no conductivity is detected in the absence of the injection needle 4a. The conductivity is held as a detection result C at the output of the needle detection circuit 8.
    Fig. 23 shows an eleventh embodiment of the invention, which substantially corresponds to the tenth embodiment of the invention.
    Also, as a holding means 4, a combination of an external thread in the region of the opening with a female thread holding part 41 fixedly connected to the injection needle 4a is used, by which the injection needle 4a is held in position. From the inside of the cap 16, a button 6a protrudes. The holding part carrying the internal thread projects into the stroke range of the pushbutton 6a and actuates it.
    The needle detection circuit 8 is connected downstream of the push-button 6a and consequently detects whether an injection needle 4a is present or not. The conductivity is provided as the detection result C at the output of the needle detection circuit 8.
    Fig. 24 shows a twelfth embodiment of the invention which substantially corresponds to the sixth embodiment of the invention. Instead of the detection electrodes 6 and 7, there is provided a detection coil 6b disposed in an area in which - if present - the injection needle 4a projects and whose both terminals are connected to the needle detection circuit. Due to the conductive and / or magnetic properties of the injection needle 4a, the detection coil has Fig. 6b shows a different inductance in the presence of an injection needle 4a than in the absence of an injection needle 4a.
    The needle detection circuit 8, which measures the inductance of the detection coil 6b in this case, holds this inductance as a detection result C at its output.
    Fig. 25 shows a thirteenth embodiment of the invention which substantially corresponds to the twelfth embodiment of the invention. Unlike Fig. 23, in Fig. 24, the detection coil 6c is disposed between the container and the housing inner wall of the dispenser. If an injection needle 4a inserted into the opening 3 or. passed through the septum, due to the different electrical and / or magnetic properties of the injection needle 4a, the inductance measured at the detection coil 6c changes as a detection result C.
    Fig. 26 shows a fourteenth embodiment of the invention, which substantially corresponds to the thirteenth embodiment of the invention. Unlike in Fig. 24, in Fig. 25, the detection coil 6d, spaced from the container 2, is disposed between the dispenser and the female threaded portion of the holding means 4. If an injection needle 4 a is inserted into the opening 3 or guided through the septum, changes due to the different electrical and / or magnetic
    Properties of the injection needle 4a, the inductance measured at the detection coil 6d as a detection result C.
    权利要求:
    Claims (20)
    [1]
    Claims 1. A dispensing device for dispensing liquids (1), in particular liquid medicines, to persons, comprising - a container (2) filled with the liquid (1) having at one end an opening (3) for dispensing the liquid (1) holding means (4) for holding an injection needle for injecting the liquid (1) located in the container (2) are provided in the region of the opening (3), - a measuring system (5) for, in particular capacitive, determination of a Measured value (M); and - a processing unit (13) for determining at least one physical or chemical parameter value (P), in particular the filling level, associated with the container (2) or the liquid (1) contained therein, characterized on the basis of the measured value (M) in that - there is at least one detection element (6) in the region of the opening (3), - that a needle detection circuit (8) is present, the detection nselement (6) is connected to the needle detection circuit (8), - that the needle detection circuit (8) for measuring an at the output of the detection element (6) can be tapped off electrical characteristic, in particular the inductance, capacitance or conductivity, is formed, - that a processing unit (13) is present, and the measurement result applied to the output of the needle detection circuit (8) is supplied as a detection result (C) to the processing unit (13), and - the processing unit (13) sets the parameter (P) in dependence on the measurement value (M) and the detection result (C ) and available at its exit.
    [2]
    A dispenser according to claim 1, characterized in that the processing unit (13) compares the detection result (C) supplied thereto with a predetermined threshold value (T) and calculates the parameter value (P) available at the output on the basis of the measured value (M) the calculation rule used to calculate the parameter value (P) is determined according to the result of the comparison of the detection result (C) with the predetermined threshold value (T).
    [3]
    3. Dispensing device according to claim 1 or 2, characterized in that - a first calibration function (F1) is stored in the processing unit (13), which determines the relationship between the measured value (M) and the liquid ( 1) related physical or chemical parameter value (P) in the presence of an injection needle in the holding means (4) indicates, - that in the processing unit (13) a second calibration function (F2) is stored, the relationship between the measured value (M) and with the physical or chemical parameter value (P) associated with the container (2) or the liquid (1) in the absence of an injection needle in the holding means (4), and - that the processing unit (13) determines the parameters (P) used calibration function depending on the comparison of the detection result (C) with the predetermined threshold (T) selects.
    [4]
    4. Dispensing device according to claim 1 or 2, characterized in that - the processing unit (13) comprises a first unit (14) and a second unit (15), - that in the first unit (14) a first calibration function (F1) is stored indicative of the relationship between the measured value (M) and the physical or chemical parameter value (P) associated with the container (2) or liquid (1) in the presence of an injection needle in the holding means (4), the first unit (14 ) applies the first calibration function (F1) to the measured value (M) applied to it and keeps the result thus obtained at its output as the first parameter value (P1), and - stores a second calibration function (F2) in the second unit (15) is the relationship between the measured value (M) and the physical or chemical parameter associated with the container (2) or liquid (1) therein in the absence of an injection needle in the holding means (4), the second unit (15) applying the second calibration function (F2) to the measured value (M) applied to it and the result obtained at its output as the second parameter value (P2). available.
    [5]
    A dispenser according to any one of the preceding claims, characterized in that - the processing unit (13) comprises a first unit (14) for determining a first parameter value (P1) which includes a first calculation rule which, based on the measurement value (M), adds the parameter value (P) Presence of the injection needle (4a) in the holding means (4) supplies, applies to the measured value (M), - that the processing unit (13) has a second unit (15) for determining a second parameter value (P2), the second calculation rule, based on Measured value (M) supplies the parameter (P) in the absence of the injection needle (4a) in the holding means (4), applies it to the measured value (M), and - the processing unit (13) supplies the detection result (C) with a predetermined threshold value ( T) compares and, depending on this comparison, either the first or second parameters determined by the first unit (14) or by the second unit (15) (P1, P2) as parameter (P) at its output.
    [6]
    6. Dispensing device according to one of the preceding claims, characterized in that on the measuring system (5) at least one pair of outside, in particular adjacent to the wall of the container (2) arranged measuring electrodes (9,10) for determining the between the measuring electrodes (9 , 10) are tapped capacable and this capacitance measured value as the measured value (M) of the processing unit (13) is fed, - wherein in particular at least one of the measuring electrodes (9,10) surrounding further metal structure (11) is present, and preferably at least one of the metal structures (11) is designed as an electrical shield (12).
    [7]
    7. Dispensing device according to one of the preceding claims, comprising an attachable cap (16), characterized in that the attachable cap (16) at least partially located on the side of the opening (3) of the dispenser and at least one of the holding means (4) held injection needle (4a) completely surrounds or which has a recess through which a possibly held by the holding means (4) injection needle protrudes, - that the detection element (6) on or in the attachable cap (16) in the region of the holding means (4) or in the region of the injection needle (4a), and in particular that the measuring system (5) and the needle detection circuit (8) are integrated in the attachable cap (16).
    [8]
    8. Dispensing device according to one of the preceding claims, characterized in that - the detection element (6) as conductive in the region of the opening (3) arranged detection electrode (6) is formed, - that the detection electrode (6) is electrically coupled to a needle detection circuit (8) in that the needle detection circuit (8) is designed to measure the capacitance between the detection electrode (6) and a further metal structure (7) arranged in or on the dispenser, the capacitance measurement result applied to the output of the needle detection circuit (8) being the detection result (C) of the processing unit (13), - that the processing unit (13) calculates the parameter (P) in dependence on the measurement result (M) and the detection result (C) and makes it available at its output.
    [9]
    9. Dispensing device according to one of the preceding claims, characterized in that - the metallic structure (7) as a further detection electrode (7) in the region of the opening (3), in particular in the region of the holding means (4) is formed, or - that as a metallic structure (7) the mass of the measuring system (5) functions, or that at least one of the measuring electrodes (9, 10) of the measuring system (5) functions as a metallic structure (7), or that a further metal structure (11 ) or shielding (12), or that acts as a metallic structure (7) on the outside of the container (2) in the region of the opening (3) existing metal ring
    [10]
    10. Dispensing device according to claim 8 or 9, characterized in that - the detection electrode (6) and optionally the metallic structure (7), in particular in the form of a further detection electrode, in or on the attachable cap (16) in the region of the holding means (4) or in the region of the injection needle (4a) are arranged, and / or - that the detection electrode (6) and optionally the metallic structure (7), in particular in the form of another detection electrode, in the region of the holding means (4) for the injection needle on the outer wall of the container (2) are arranged, and / or - that the detection electrode (6) and optionally the metallic structure (7), in particular in the form of a further detection electrode, in the region of the holding means (4) for the injection needle in the outer region of the dispensing device, spaced from the container (2) are arranged.
    [11]
    11. Dispensing device according to one of claims 1 to 7, characterized in that - the detection element (6) by a switch (6a) is formed, - that the needle detection circuit (8) for measuring the electrical conductivity between the contacts of the switch (6a) in that - the switch (6a) is mechanically actuated by the presence of an injection needle (4a), and - that the switch (6a) is electrically coupled to the processing unit (13).
    [12]
    12. Dispensing device according to claim 11, characterized in that - due to the actuation of the switch (6a) the threshold value comparator (18) of the processing unit (13) via the switch (6a) an electrical signal as the detection result (C) is supplied.
    [13]
    Dispensing device according to one of Claims 1 to 7, characterized in that the detection element (6) is formed by a conductor arrangement or coil (6b) whose inductance is different in the presence of an injection needle than in the absence of the injection needle (4a). in that the conductor arrangement or coil (6b, 6c, 6d) is electrically coupled to the needle detection circuit (8) formed as an inductance measuring circuit (8), that the needle detection circuit (8) for measuring the inductance of the conductor arrangement or coil (6b, 6c, 6d), wherein the detection result (C) present at the output of the needle detection circuit (8) is supplied in the form of an inductance measurement to the processing unit (13), - the processing unit (13) sets the parameter (P) as a function of the measurement result (M) and of the Detection result (C) is calculated and available at its output, in particular - the conductor arrangement or coil (6b, 6c, 6d) are arranged in the region of the holding means (4) for the injection needle on the outer wall of the container (2), or - that the conductor arrangement or coil (6b, 6c, 6d) in the region of the holding means (4) for the injection needle in the outer region of the dispensing device, spaced from the container (2) are arranged.
    [14]
    14. A dispenser according to claim 13, characterized in that the coil (6b, 6c, 6d) is arranged such that in the presence of the injection needle (4a) is at least partially wrapped by the turns of the coil.
    [15]
    15. Dispensing device according to claim 13, characterized in that - the conductor arrangement or coil (6b, 6c, 6d) are arranged in or on the attachable cap (16) in the region of the holding means or in the region of the injection needle, wherein in particular the coil (6b , 6c, 6d) such that, when the injection needle (4a) is present and the cap (16) is placed on the dispenser, the injection needle (4a) is at least partially wrapped by the turns of the coil.
    [16]
    16. Dispensing device according to one of claims 1 to 7, characterized in that - the detection element (6) by two contact elements (6, 7) is formed, which are in the presence of an electrically conductive injection needle (4a) in electrical contact with this, in particular via the electrical connection between the contact elements (6, 7) and the electrically conductive needle (4a) the threshold value comparator (18) of the processing unit (13) an electrical signal is supplied as a detection result (C).
    [17]
    17. Dispensing device according to one of claims 1 to 7, characterized in that - on one with the injection needle (4a) undetachably connected holding part (41) an electrically conductive coating (42) is present, and - that two detection elements (6, 7) in Form of contact elements (6, 7) are provided which are in the presence of an injection needle (4a) in electrical contact with the electrically conductive coating, wherein in particular - via the electrical connection between the contact elements (6, 7) and the electrically conductive coating the threshold value comparator ( 18) of the processing unit (13) an electrical signal as a detection result (C) is fed, and / or - the contact elements (6, 7) in or on the attachable cap (16) in the region of the holding means (4) or in the region of the injection needle (4a ) are arranged.
    [18]
    18. Method for determining a physical or chemical parameter (P) related to a container (2) or a liquid (1) in the container (2), in particular the level of the liquid in the container (2), - the container ( 2) has at one end an opening (3) for dispensing the liquid (1), and holding means (4) for holding an injection needle (4a) in the region of the opening (3) for injecting the liquid (1) present in the container (2) ), and - wherein a measured value (M) in the region of the container (2) is determined, characterized in that - by means of a detection element (6) located in the region of the opening (3) a detection result dependent on the presence of an injection needle (4a) (C), in particular by determining the capacitance between a metallic detection electrode (6) located in the region of the opening (3) and a in or on the delivery device Further metallic structure (7), - that the detection result (C) is compared with a threshold (T) and depending on the threshold comparison, the presence or absence of an injection needle (4a) is detected in the holding means, wherein - upon detection of the presence of an injection needle, a first Parameter (P1) by using a first calculation rule which, on the basis of the measured value (M), supplies the parameter value (P) in the presence of the injection needle (4a) in the holding means (4) to which the measured value (M) is applied, and the first parameter value thus determined (P1) is provided as a parameter value (P), and - upon detection of the absence of a hypodermic needle, a second parameter value (P2) by using a second calculation rule which, based on the measurement value (M), sets the parameter value (P) in the absence of the injection needle (4a) in the holding means (4), to which the measured value (M) is applied, and the second parameter (P2) a thus determined lsParameter value (P) is kept available.
    [19]
    19. A method according to claim 18, characterized in that - a first calibration function (F1) is specified, which determines the relationship between the measured value (M) and the physical or associated with the container (2) or the liquid therein (1) chemical parameter value (P) in the presence of an injection needle in the holding means (4) indicates that - a second calibration function (F2) is specified, which determines the relationship between the measured value (M) and the liquid (1) or liquid (1 ) in the absence of an injection needle in the holding means (4); and in that upon detection of the presence of an injection needle (4a) the first calibration function (F1) is applied to the measurement (M) and result obtained as parameter (P), and that upon detection of the absence of one of the injection needle (4a), the second ka librierfunktion (F2) is applied to the measured value (M) and the result obtained as a parameter value (P) is available.
    [20]
    20. The method according to any one of claims 18 or 19, characterized in that as measured value (M) between two outside in the outer region, in particular adjacent to the wall of the container (2), arranged measuring electrodes (9,10), tapped capacity is used.
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    同族专利:
    公开号 | 公开日
    WO2016118987A1|2016-08-04|
    EP3250265A1|2017-12-06|
    AT516283B1|2016-04-15|
    EP3250265B1|2019-01-09|
    US20180274962A1|2018-09-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3923079A1|1989-07-13|1991-01-24|Fresenius Ag|Measuring level of electrically conducting liquid - has measuring of infusion liquid or blood from change in capacitance of electrodes in measurement liquid|
    US5782814A|1994-07-22|1998-07-21|Raya Systems, Inc.|Apparatus for determining and recording injection doses in syringes using electrical inductance|
    WO2014052997A1|2012-10-05|2014-04-10|Seibersdorf Labor Gmbh|Dispensing device for medications|WO2017197420A1|2016-05-20|2017-11-23|Ait Austrian Institute Of Technology Gmbh|Arrangement for determining the fill level of the liquid in the carpule|US5720733A|1994-07-22|1998-02-24|Raya Systems, Inc.|Apparatus for determining and recording injection doses in syringes using electrical capacitance measurements|
    EP3348295B1|2008-12-22|2019-04-03|PHC Holdings Corporation|Medicament dispensing device|AT512504B1|2012-03-22|2013-09-15|Seibersdorf Labor Gmbh|Apparatus and method for determining the capacity|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50058/2015A|AT516283B1|2015-01-28|2015-01-28|dispenser|ATA50058/2015A| AT516283B1|2015-01-28|2015-01-28|dispenser|
    EP15808081.2A| EP3250265B1|2015-01-28|2015-11-27|Liquid dispensing device and method of determining a parameter of a liquid in a container|
    PCT/AT2015/050302| WO2016118987A1|2015-01-28|2015-11-27|Injection device for liquid|
    US15/546,486| US20180274962A1|2015-01-28|2015-11-27|Injection device for liquid|
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