• 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 method and a device for determining the resistance per length of a stranded cable, wherein for determining the specific length resistance of a stranded line (1) at least one first circuit (4) by connecting a current source (4.1) to the line (1). at at least two circuit connection points (4.2, 4.3) of the line (1) having finite distance from each other, is formed. For the safe conclusion of unknown compensation currents from the measurement result, it is provided that voltages are taken over at least two defined line sections (2.3, 3.3), wherein at least one first line section (2.3) lies in the first circuit (4) and at least one second line section (3.3) is not in the first circuit (4) and that from the at least two measured voltages, a mean voltage value is determined. Furthermore, the invention relates to a use of the inventive method in a production process for producing a multi-wire line (1).
    公开号:CH711878B1
    申请号:CH00477/17
    申请日:2015-09-04
    公开日:2019-05-15
    发明作者:Schreiweis Thomas；Burster Matthias
    申请人:Burster Cable Measurement Gmbh；
    IPC主号:
    专利说明:

    Description: The invention relates to a method for determining the specific linear resistance of a multi-wire line, at least one first circuit being formed by connecting a current source to the line at at least two circuit connection points of the line, which are at a finite distance from one another, and a device for determining the specific length resistance of a multi-wire line, with a current source which is connected to the line in at least one first circuit via a first line region.
    In the manufacture of multi-wire lines, individual, non-insulated wires are stranded by a stranding machine to form a line, which is also referred to as an electric rope. The electrical specific length resistance of a line or electrical resistance per length of a line is determined as the quotient of the electrical resistance of the line and the length of the line section over which the resistance was measured. The specific length resistance is also called the resistance per length of the line. It depends on the material (usually copper or aluminum) and the cross-section. For this, certain upper limits defined by standards must be observed. In the case of multi-wire cables, a constant diameter of the cross section over the length of the cable should be aimed for in order to achieve a constant specific linear resistance.
    In current methods of measuring the resistance per length of a multi-wire line, a defined current is applied to an area of the line. The voltage drop over a defined section of the line is measured within this line area. To determine the resistance per length of the line section, the measured voltage drop is divided by the product of the current strength and the length of the line section.
    In addition, methods are known in which the unknown resistance of a line is determined using comparative measurements. The voltage on the examined line section is compared with that on a defined resistor or a test line with known parameters. This is done either at the same time by circuit elements connected in parallel or one after the other. In the latter method, capacitors can be used to temporarily store the potentials.
    When stranding single wires to line ropes or multi-wire lines, the resulting stranding machines and their follow-up devices have components, such as compressors for the line, take-off wheel or rewinder, which are in electrical contact with the multi-wire line and on the other hand are connected to the ground with unknown electrical resistance can be in electrical connection, even if an electrically insulated installation is provided, but this is not completely the case. As a result, unknown leakage or equalizing currents can flow through such components. The currents are unknown and they overlap with the current applied by a current source. This leads to an incorrect value in the determination of the resistance per length of the multi-wire line.
    A disadvantage of the known method is that such unknown compensating currents are not or are not adequately detected and falsify the measurement result.
    The invention has for its object to provide a method and an apparatus which, while avoiding the above. Disadvantages enable the determination of the specific linear resistance of a multi-wire cable under exclusion of the influence of unknown compensation currents.
    The object is first achieved by a generic method, which is characterized according to the invention in that voltages are taken across at least two defined line sections, at least one first line section lying in the first circuit and at least one second line section not lying in the first circuit and that a mean voltage value is determined from the at least two measured voltages.
    Furthermore, the object is achieved by a generic device, which is characterized according to the invention in that at least one first voltage measuring circuit is provided with at least one line section which is part of the first circuit and at least one second voltage measuring circuit is provided with a line section which is not Is part of the first circuit and that a device for determining an average voltage value, which is provided over at least two defined line sections of the line voltages.
    The invention brings about an - at least largely - elimination of the influences of flowing unknown compensation currents on the measurement result. At best, their influence lies in the usual tolerance ranges of the measurement. By means of the device according to the invention, the current of the current source flows in opposite directions via a circuit connection point located in the circuit in the line regions of the line. Any compensation current that is present always has the same direction in both line areas. Several voltage measurements are carried out along the line on sections of defined length with a defined current of the current source. At least one line section is included in the circuit, at least one further line section is not part of the circuit. The total resistance of the line is determined from single voltage measurements by averaging. This compensates for the influences of flowing equalizing currents. The invention allows a very precise determination of the resistance per length of a multi-wire line.
    CH 711 878 B1 With the method and the device according to the invention, the resistance per length of a multi-wire line can be determined from several individual measurements. This at least significantly reduces the influence of equalizing and interference currents. This leads to a more precise value of the resistance per length of the multi-wire line compared to the individual measurements.
    In the proposed method, the current source acts on the line with a defined current. In a further development of the method it can be provided that at least two circuits of the current source are formed with the line at three circuit connection points of the line which are finite apart from one another. In this way, two circuits are formed by three circuit connection points of the line at a finite distance from one another, the two circuits having a common current source which applies a defined current to the line. At least one voltage measurement is carried out along two defined line sections between the circuit connection points in order to determine an average voltage across the line sections. While the measurements can basically be carried out one after the other in a preferred embodiment, in particular for receiving time-varying interference currents, it is provided that the voltages in measuring circuits are measured simultaneously.
    For this purpose, it can be provided in terms of the device that the current source is connected to at least a first and a second circuit with successive line areas, each line area belonging to one of the circuits, in particular by means of a voltage measuring unit using high-resistance resistors with respect to the resistance of the line The voltage value of the two line sections of the line is measured and an average resistance value of the line is preferably determined from this.
    Even with good insulation of the line from the aforementioned components of the stranding structure, a current of the current source always flows in this way along the entire line, that is to say in particular also all line sections along which a voltage measurement is provided. This configuration increases the accuracy of the result, particularly with regard to averaging.
    The resistance per length of the line is determined from the defined current and the determined mean voltage value. This process step quickly leads to the desired result and is easy to implement.
    The method provides that a voltage measurement is carried out with each measuring circuit, simultaneously or in succession, preferably at least one voltage measurement being carried out on a line section which is connected to the first circuit and at least one voltage measurement being carried out on the line section which is connected to the second circuit. A mean voltage value of the two line sections of the line can be measured by means of a voltage measuring unit via resistors which are high-resistance to the resistance of the line, and preferably an average resistance value of the line can be determined from this. For this purpose, the device either provides that two measuring circuits are connected to the line by two contacts each and have a voltage measuring unit for measuring the voltage of the line at the respective line section, or that a voltage measuring unit has resistors with high resistance to the resistance of the line with the two successive line sections of the line Line is connected.
    While the current source basically generates direct current as a direct current source, it can alternatively be provided to apply alternating current to the existing circuit or individual components thereof.
    While ohmic resistances are preferably present in terms of circuitry in the first case, AC resistances, such as capacitors and / or coils with equivalent parameters, can be used in addition to ohmic resistors in the second case. In the following, the word «resistance» refers both to ohmic resistors and, where appropriate, to AC resistors with corresponding parameters. This configuration allows the determination of the impedances of the components, which can be optimized for certain frequencies of the AC operation.
    Preferably, the determined resistance per length of the multi-wire cable is compared with specified limit values. This step can be used to determine whether these limit values have been exceeded during the production process. Countermeasures can be initiated promptly.
    The result of the comparison can be output as a signal, in particular as an acoustic or optical signal. The measurement results can also be output for further processing. When manufacturing the line, a signal indicates that the upper limits for the resistance values have been exceeded, and appropriate countermeasures can be initiated promptly. Reliable quality control is guaranteed. The contact of individual wires of a line with one another can be impaired by the stranding process. The resistances of the line sections running between insulated two-part contacts can therefore preferably be determined. Due to the isolated two-part design of the contacts, the resistance of the line running between them is measured at two points. This prevents a part of the line whose contact with the remaining part of the line is impaired from impairing the determination of the resistance value of the line.
    CH 711 878 B1 It is most preferably provided that the arithmetic mean of the two values is determined from the individual resistances of the line sections connecting the contacts by an electrical circuit with resistors connected in parallel. The use of computers in this process step can be dispensed with by means of measurement or physical averaging, which can also be referred to as analog averaging. Due to the circuitry, the arithmetic mean value can be tapped over the resistors connected in parallel. The material and time expenditure for a correspondingly designed calculation step is thus eliminated.
    Contacting the line with the measuring circuits can be configured in two parts, with both parts forming the contact surface for the line. This enables a measurement to be carried out at two positions on the line section.
    If the contact of part of the line with the rest of the line is impaired, there is an inhomogeneous current distribution in the cross section of the line. The two-part design of the contacts reduces impairments from an inhomogeneous current distribution in the line.
    If there are two isolated two-part contacts, part of the first contact can be connected to part of the second contact and the other two parts of the contacts can be connected to one another via a voltage measuring unit. This enables two voltage measurements to be made across the line section between them. If the current distribution is inhomogeneous across the cross section of the line, the risk of an incorrect determination of the resistance of the line is reduced by measuring the voltage at several circumferential points of the line.
    Each part of the two-part contacts can be connected to a resistor which is a multiple, preferably at least ten times the value of the estimated resistances of the connections of the contacts. This dimensioning of the resistors largely prevents the current from flowing away via switching elements mounted parallel to the line. This would lead to an incorrect determination of the resistance of the line. This is avoided by the design of the resistors. Most preferably, two resistors of the parts of a contact on their side facing away from the line can be connected to one another with a common voltage measuring unit. This represents a circuit for analog averaging.
    The averaged value from the individual voltages is applied to the voltage measuring device and can be used to determine the resistance. The determination of the resistance of the line achieved in this way is less susceptible to errors compared to statistical fluctuations than a determination from the individual voltages.
    Further developments of the device according to the invention can provide that the line regions respectively connected to the circuits extend from an outer circuit connection point of the line to the middle of the line between the circuit connection points. This results in the division of the line into two line sections of the same length. The line resistances are approximately the same, which means that the same currents flow on both line areas. The measured voltages of the line sections can then be averaged and then divided by the current intensity in order to obtain the resistance of the line. The calculation and averaging of the individual resistances is therefore no longer necessary.
    In each case one contact at the ends of one of the line sections on which the measurement is based can be electrically conductively connected to one another, the type of connection being able to be designed symmetrically around the central circuit connection point. In addition, measurement line sections connected to one another in this way can have a common voltage measurement unit, which is designed to measure the voltage of two successive measurement line sections, each in a different circuit. With this arrangement, an average voltage value can be measured from the respective individual voltages of the measuring circuits involved by the common voltage measuring unit. The value obtained in this way does not require any material or time expenditure for averaging and is less prone to errors than the specific individual values.
    In a further development it can be provided that a voltage measuring unit is provided which is connected to two successive line sections of the line via resistors which are high-impedance to the resistance of the line. By switching the voltage measuring unit, the voltages of both line sections can be measured with a voltage measuring unit. If the measurement and the subsequent switchover are sufficiently fast compared to the temporally changing interference currents, their influence on the result can also be compensated for in this way.
    Preferably, the existing measuring circuits can have resistors whose resistance values are a multiple of the estimated resistance values of the line sections which are connected to the respective circuits, preferably at least ten times. As a result, voltage drops at the components of the measuring circuits that do not belong to the respective line section are reduced. This leads to a high accuracy of the determined values.
    To determine the resistance per length of the line, the device can have a circuit for measuring / physical, ie analog, averaging. Averaging is not carried out by explicit calculation, for example, of a computing unit, but the averaged voltage value can be tapped off as a voltage.
    CH 711 878 B1 This eliminates the need for a device for averaging to be carried out outside the circuit. The analog averaging has the advantage that the mean value is obtained immediately via a voltage measurement. Due to its nature, the mean value is less susceptible to statistical fluctuations than its individual values.
    An evaluation unit can also be provided, which determines the resistance per length of the line from the defined current and the measured voltages. This device element results in a quick determination of the desired parameters and the possibility of a quick comparison with previously defined limit values. The measured values and the results of the comparison can be used for further processing.
    Further advantages and features of the invention emerge from the claims and from the following description, in which exemplary embodiments of the invention are explained in detail with reference to the drawings. It shows:
    1 shows a schematic view of a device according to the invention;
    Fig. 1a shows a section through the line of Figure 1 with a plan view of a contact.
    2 shows an electrical circuit diagram of an embodiment of the device according to the invention with a single connected circuit;
    2a shows an electrical circuit diagram of a further embodiment of the device according to the invention with two connected circuits;
    3 shows an electrical circuit diagram of a second embodiment of the device according to the invention; and
    4 shows a schematic view of a further development of the device according to the invention.
    The line 1 in Fig. 1 is designed as a multi-wire line 1. Using a stranding machine, several, non-insulated individual wires were made into a multi-wire line 1 by means of stranding. In the production environment - at 4.4 (not shown physically) - there is a compressor that twists the individual wires of the stranded line 1 against each other and thus reduces the line cross-section. A take-off wheel - at 4.2 (not shown physically) - is used to guide the line 1. A rewinder winds up the line 1 produced on a drum in order to prepare it for transport. The otherwise continuous manufacturing process is stopped for the measurement.
    Even if the components listed above at least partially consist of electrically non-conductive or poorly electrically conductive materials or are arranged insulated from earth, there may be incomplete insulation via “earth”.
    2, a first circuit 4 is formed with a current source 4.1 with the line 1 via a first circuit connection point 4.2 and a second circuit connection point 4.3, which is attached in the middle of the line 1 running therebetween. The current source 4.1 acts on the line 1 with a defined (total) current. 2a shows an embodiment in which the current source 4.1 is connected to the line 1 via the circuit connection points 4.2, 4.3 in a first circuit and via circuit connection points 4.3, 4.4 in a second circuit.
    Between each an outer circuit connection point 4.2, 4.4 (the latter in FIG. 2a) and the middle circuit connection point 4.3, a measuring circuit 2.3 is connected to line 1 via two contacts 2.1.2.2.3.1.3.2. The contacts 2.1, 2.2, 3.1, 3.2 are designed as U- or here as V-shaped contacts, which are referred to as cutting edges and are in pairs at a defined axial distance from one another. The cutting edges have components made of metal and in particular brass. The cutting edges can consist of individual elements which are in contact with the line 1 and are insulated from one another, as will be described in detail later.
    The associated electrical circuit diagram is shown in Fig. 2. The circuit connection points 4.2, 4.3 (the latter in FIG. 2a) can be seen on the line 1 running between them. The outer circuit connection points 4.2, 4.3
    4.4 represent - as mentioned - contacts of line 1 with the components from the manufacturing environment. They are each additionally provided with a ground connection 6.1.6.2 via a resistor 5.1.5.2.
    Between an outer circuit connection point 4.2, 4.4 and the middle circuit connection point
    4.3, a measuring circuit 2, 3 is connected. Both measuring circuits 2, 3 have an identical structure: A voltage measuring unit 2a, 3a is connected via two contacts 2.1.2.2, 3.1, 3.2, which measures the voltage drop across the associated line section 2.3, 3.3. The length of the line section 2.3, 3.3 is determined from the distance between two contacts 2.1, 2.2, 3.1, 3.2 of a measuring circuit 2, 3. This distance is fixed and preferably the same for both measuring circuits 2, 3. However, the length can fundamentally also be different and this can be taken into account mathematically.
    CH 711 878 B1 The measurement of the resistance of line 1 is carried out according to the following method: A line 1 stranded from several individual wires reaches the rewinder via the take-off wheel. The processing process is briefly stopped for measurement. The line 1 is contacted via the circuit connection points 4.2, 4.3 with the current source 4.1. The circuit is now connected to line 1.
    A first measuring circuit 2 is connected between the circuit connection point 4.2 of the trigger wheel and the middle circuit connection point 4.3 by two contacts 2.1, 2.2 with the line 1. The contacts 2.1, 2.2 are at a defined distance from one another. The same applies to a second measuring circuit 3. It is attached between the middle circuit connection point 4.3 and the circuit connection point 4.4 of the rewinder. Its contacts 3.1.3.2 are - here - at the same distance as those of the first measuring circuit 2. The contacts 2.1.2.2, 3.1.3.2 are, as mentioned, designed as V-shaped cutting edges. Both measuring circuits 2, 3 are each provided with a voltage measuring unit 2a, 3a.
    The current source 4.1 of the circuit now applies a defined current to line 1. In this arrangement, two currents flow through line 1: Despite the existing resistors 5.1, 5.2 between the outer circuit connection points 4.2, 4.4 of line 1 and the ground connections 6.1,6.2, compensating currents can flow along line 1. Compensating currents can originate from different ground potentials 6.1.6.2. The direction of the equalizing current is the same at a certain point in time along line 1 in both sections 2.3, 3.3.
    In addition, the currents introduced by the current source 4.1 flow along the line 1, in particular also to the ground connections 6.1,6.2. The directions of the currents introduced by the circuit are determined by relevant laws of electrical engineering in the circuit connection points 4.2, 4.3 and are directed at a certain time in sections 2.3, 3.3 along the line 1.
    The measuring circuits 2, 3 serve to measure the voltage drop across the respective line sections 2.3, 3.3 lying between the contacts 2.1, 2.2 and 3.1, 3.2. From the knowledge of the voltage drop at line sections 2.3, 3.3 and their defined lengths, the resistance per length of line 1 of line sections 2.3, 3.3 can be determined.
    The total value for the resistance per length of line 1 is the arithmetic mean of the two determined individual resistance values. The influence of the equalizing current flowing along line 1 with the same direction is eliminated by averaging. If both voltage measurements are carried out simultaneously over the line sections 2.3, 3.3, the averaging can also eliminate any interference currents that may be present. Interference currents are currents that change over time and can be caused by components of the stranding machine. If, for example, the measurement is carried out directly in succession by a single voltage measuring device 2a, 3a which can be switched between the line sections 2.3, 3.3, this also applies in a corresponding manner within the framework of accepted tolerances with regard to the temporal changes in the interference currents which are small compared to such a measuring sequence. Designate - as indicated in FIG. 2 - R 2 , R3 the resistances of the (measuring) sections 2.3, 3.3, l 2 , l 3 , the current flowing through each of these line sections and U 2 , U 3 , which pass through the line sections 2.3 , 3.3 measured voltages, this gives the averaged voltage value U m according to [0048] With regard to a given equalizing and interference current and the constant current of the current source 4.1, the positive voltage drop from the middle circuit connection point 4.3 is next to the line sections 2.3, 3.3 to the outer circuit connection points 4.2 or 4.4 measured, as indicated by arrows in FIG. 2.
    The following also applies (2):
    If the currents are composed as currents I = l q2 + l q3 flowing through the current source and equalizing and interference currents l a and l s , the following applies:
    CH 711 878 B1:
    U
    2 and so
    R = (6)
    I The device according to the invention thus compensates for occurring compensating currents and occurring interference currents and their influence when measuring the voltage of the measuring circuits 2, 3 or their influence is eliminated in the case of mean value measurement by immediately successive measurements.
    Alternatively, as already mentioned, only one voltage measuring unit 2a, 3a, which is located between sections 2.2,
    3.2 is to be used. First, the voltage drop across a defined line section 2.3 is measured. After acquiring the voltage value and (temporarily) storing it on the other line section
    3.3 switched. The measurements of the voltage on the line sections 2.3, 3.3 are thus carried out temporally - directly
    successively by the same voltage measuring unit, e.g. 2a.
    In a further embodiment, a second circuit 4.5 is across the middle circuit connection point
    4.3 and the other, outer circuit connection point 4.4, as shown in FIG. 2a. Both circuits 4, 4.5 have the same current source 4.1.
    With this configuration, even in the event that the resistance of the second line section 3.3 is high-resistance, a current flows through this line section 3.3. In this case too, the resistance of line 1 can be determined by averaging, with better accuracy of the result. For the procedure, reference is made to the preceding explanations.
    3 describes a further development of the device according to the invention. The corresponding FIG. 3 shows the embodiment already mentioned with two circuits 4, 4.5 according to FIG. 2a. A single circuit according to FIG. 2 can also be used. Both measuring circuits 2, 3 are now each provided with two additional resistors 2.4, 2, 5, 3, 4,
    3.5 provided. The value of these resistors is a multiple, preferably at least ten times the value of the resistors R 2 , R3 of the respective line sections 2.3 and 3.3. It is a common voltage measurement unit
    2.6 available. The resistors 2.5, 3.4 connected to the line 1 at the middle circuit connection point 4.3 of the current source 4.1 close to 2.2, 3.1 and the line 1 at 2.1,3.2 correspondingly contacting resistors 2.4, 2.5 are connected to each other on the side facing away from line 1, while the voltage measuring unit 2.6 is arranged between the resistance group 2.5, 3.4 on the one hand and the resistance group 2.4, 3.5 on the other. Through this
    - Also shown in Fig. 3 - structure eliminates the need to measure two voltages and the mathematical determination of the mean voltage value U m via the line sections 2.3.3.3. Rather, the arithmetic mean value U m of the measuring voltages is established in the common voltage measuring unit 2.6. Due to the flowing currents and this «analog» averaging, the resistance per length of the line 1 - is determined metrologically / physically according to formula (6). With this arrangement, the computational averaging is omitted and is replaced by the device-related «physical» averaging of the voltages. The influences of equalizing and interference currents are compensated for.
    As already mentioned, the contacts 2.1.2.2.3.1.3.2 of the measuring circuits 2, 3 are preferably designed as two-part (or also multi-part) cutting edges with mutually insulated contact areas (FIGS. 1, 1a, 4). These are V-shaped and the stranded line 1 runs through their notches. They preferably have contact components made of brass. The cutting edges 2.1.2.2 are used for electrical contacting of the stranded line 1 with the measuring circuits 2, 3 and especially in FIG. 4 with the measuring circuit 2. The two-part design of the cutting edges 2.1, 2.2 thus makes contact with the line 1 at two points the scope of line 1.
    The electrical connection of two cutting edges 2.1, 2.2 is shown in FIG. 4. A part of a cutting edge 2.1 is connected to a part of the other cutting edge 2.2. The line sections 2.7, 2.8 in between are again symbolized in the drawings as resistors. The voltages falling across line sections 2.7, 2.8 are measured by voltage measurements. From this, the resistance per length of line 1 can be determined according to one of the methods listed above. Due to the two-part design of the contacts 2.1, 2.2, this method has the advantage of taking into account inhomogeneous current distributions along the circumference of the line 1. For example, in the manufacturing process, a group of wires of line 1 may be in poor contact with the rest of the wires. By measuring at - at least - two circumferential points of line 1, deviations can be recognized by a consequent, inhomogeneous current distribution.
    In a further embodiment, the contacts 2.1, 2.2, resistors 2.9, 2.10, 2.11, 2.12 can most preferably be connected to the contact. Their value is a multiple, preferably ten times the
    CH 711 878 B1 estimated line resistance 2.7, 2.8. In this way, an outflow of currents via the additionally arranged resistors 2.9, 2.10, 2.11, 2.12 is avoided. A common voltage measuring unit 2.13 is connected between the common resistors 2.9, 2.10 of one cutting edge 2.1 on the one hand and those 2.11,2.12 of the other cutting edge 2.2 on the other hand. As a result of the circuit arrangement, the arithmetic mean of the individual voltages 2.7, 2.8 of line 1 drops there. This device is insensitive to currents distributed inhomogeneously along the circumference of the line 1.
    With the aid of an evaluation unit 7, the resistance per length of line 1 is determined on the basis of the measured voltages and the defined current strengths and line sections 2.3, 3.3 and compared directly with defined limit values. The evaluation unit 7 outputs the result of the comparison directly as an optical and / or acoustic warning signal. As an alternative or in addition, it is also possible to pass on the result and all the parameters recorded for further processing.
    权利要求:
    Claims (25)
    [1]
    claims
    1. Method for determining the specific linear resistance of a multi-wire line (1), wherein at least a first circuit (4) by connecting a current source (4.1) to the line (1) at at least two circuit connection points (4.2, 4.3) of the line (1) , which are finite apart, is formed, the current source (4.1) applying a defined current to the line (1), characterized in that voltages (U 2 , U 3 ) are taken across at least two defined line sections (2.3, 3.3) with at least one first line section (2.3) in the first circuit (4) and at least one second line section (3.3) not in the first circuit (4) and that from the at least two measured voltages (U 2 , U 3 ) The mean voltage value (U m ) is determined, and the specific linear resistance of the line (1) is determined from the defined current and the determined mean voltage value (U m ).
    [2]
    2. The method according to claim 1, characterized in that at least the first and a second circuit (4, 4.5) of the current source (4.1) with the line (1) at three circuit connection points (4.2, 4.3, 4.4) of the line (1), which are finite apart from each other.
    [3]
    3. The method according to claim 2, characterized in that at least one voltage measurement is performed over the second line section (3.3), which lies in the second circuit (4.5).
    [4]
    4. The method according to any one of the preceding claims, characterized in that the voltages (U 2 , U 3 ) in measuring circuits (2, 3) are measured simultaneously.
    [5]
    5. The method according to any one of the preceding claims, characterized in that by means of a voltage measuring unit (2.6) via resistors (2.4, 2.5, 3.4, 3.5) which are high-resistance to the resistance of the line (1), an average voltage value of the two line sections (2.3, 3.3) the line (1) is measured and preferably an average resistance value of the line (1) is determined from this.
    [6]
    6. The method according to any one of the preceding claims, characterized in that the resistances of the peripheral regions of the line (1) extending between at least two-part electrical contact units (2.1, 2.2, 3.1, 3.2) are determined, the individual components of the contact units (2.1, 2.2 , 3.1, 3.2) are electrically insulated from one another.
    [7]
    7. The method according to claim 6, characterized in that from the individual resistance measurements of the line sections (2.7, 2.2, 1.3, 3.2) connecting the contacts (2.1, 2.8) by an electrical circuit with resistors connected in parallel (2.9, 2.10.2.11.2.12 ) the arithmetic mean of both resistance values is determined.
    [8]
    8. The method according to any one of the preceding claims, characterized in that the current source (4.1) generates direct current as a direct current source or alternating current as an alternating current source.
    [9]
    9. The method according to claim 8, characterized in that the voltage measurement with direct current application via ohmic resistors and with alternating current application via ohmic resistors and / or alternating current resistors, such as coils or capacitors.
    [10]
    10. Use of the method according to one of claims 1 to 7 in a production process for the manufacture of a multi-wire line (1), characterized in that the specific specific length resistance of the multi-wire line (1) is compared with specified limit values, in particular to exceed these limit values to determine during the production process.
    [11]
    11. Use according to claim 10, characterized in that the result of the comparison is output as a signal, in particular as an acoustic or optical signal, or for further processing.
    [12]
    12. Device for determining the specific length resistance of a multi-wire line (1), with a current source (4.1), which is connected in at least one first circuit (4) to the line (1) via a first line area (4.3-4.2), wherein the current source (4.1) is designed to apply a defined current to the line (1), characterized in that at least one first voltage measuring circuit (2) is provided with at least one line section (2.3) which is part of the first circuit (4), and at least a second chip
    CH 711 878 B1 voltage measuring circuit (3) is provided with a second line section (3.3), which is not part of the first circuit (4), and that a device for determining an average voltage value (U m ) of the at least two defined line sections (2.3 , 3.3) of the line (1) measured voltages (U 2 , U 3 ) and an evaluation device (7) for determining a resistance value of the line (1) from the current of the current source (4.1) and the determined mean voltage value (U m ) is provided ,
    [13]
    13. The apparatus according to claim 12, characterized in that the current source (4.1) with at least the first and a second circuit (4, 4.5) with the first and a second line area (4.3-4.2, 4.3-4.4), which are successive, is connected, each line area (4.3-4.2, 4.3-4.4) belonging to one of the circuits (4, 4.5).
    [14]
    14. The apparatus according to claim 13, characterized in that the second voltage measuring circuit (3) with the second line section (3.3) lies in the second circuit (4.5).
    [15]
    15. Device according to one of claims 12 to 14, characterized in that the first and second voltage measuring circuit (2, 3) are each connected to the line (1) by two contacts (2.1, 2.2, 3.1, 3.2) and a voltage measuring unit ( 2a, 3a) for measuring the voltage (U 2 , U 3 ) of the line (1) at the respective line section (2.3, 3.3).
    [16]
    16. The device according to one of claims 12 to 15, characterized in that interconnected voltage measuring circuits ( 2 , 3 ) have a common voltage measuring unit (2a, 3a) which is used to measure the voltage (U 2 , U 3 ) of two adjacent, connected voltage measuring circuits (2, 3) can be switched between them.
    [17]
    17. The apparatus of claim 15 or 16, characterized in that a voltage measuring unit (2.6) across the resistance of the line (1) high-resistance resistors (2.4, 2.5, 3.4, 3.5) with the two successive line sections (2.3, 3.3) of the line (1) is connected.
    [18]
    18. Device according to one of claims 12 to 17, characterized in that the first and the second voltage measuring circuit (2,3) have resistors (2.4,2.5,3.4,3.5) whose resistance values are a multiple, at least ten times the estimated resistance values of the line section (2.3, 3.3) connected to the respective voltage measuring circuit (2, 3).
    [19]
    19. Device according to one of claims 12 to 18, characterized in that at least one contact (2.1, 2.2, 3.1, 3.2) of the line (1) with the voltage measuring circuits (2, 3) is designed in two parts with mutually insulated parts, both of which Parts form a support surface for the line (1).
    [20]
    20. The apparatus according to claim 19, characterized in that with two two-part contacts (2.1, 2.2, 3.1, 3.2) of a voltage measuring circuit (2, 3) part of the first contact (2.1) with part of the second contact (2.2) and the other two parts of the two contacts (2.1, 2.2) are connected to one another via a voltage measuring unit (2a).
    [21]
    21. The apparatus of claim 19 or 20, characterized in that each part of the two-part contacts (2.1, 2.2) via a resistor (2.9, 2.10, 2.11, 2.12) with the voltage measuring unit (2a) or the voltage measuring units (2a, 3a) is connected, the resistors (2.9, 2.10, 2.11,2.12) each having a resistance value which is a multiple, preferably at least ten times the value of the line sections (2.7, 2.8) via which the voltage measurement (s) is carried out ,
    [22]
    22. The apparatus according to claim 21, characterized in that two resistances of the parts of a contact (2.1, 2.2) on their side facing away from the line (1) are connected to one another with a common voltage measuring unit (2.13).
    [23]
    23. Device according to one of claims 12 to 22, characterized in that the line regions (4.3-4.2, 4.3-4.4) connected to the first circuit (4) or to the first and second circuit (4, 4.5) each of an outer circuit connection point (4.2, 4.4) of the line (1) to a middle circuit connection point (4.3).
    [24]
    24. Device according to one of claims 12 to 22, characterized in that the contacts (2.1.2.2, 3.1, 3.2) of the voltage measuring circuits (2, 3) are connected to one another in an electrically conductive manner symmetrically about a central circuit connection point (4.3).
    [25]
    25. Device according to one of claims 12 to 24, characterized in that the device has a circuit for measuring averaging.
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    同族专利:
    公开号 | 公开日
    DE102014014781A1|2016-04-14|
    WO2016055134A1|2016-04-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2296179B1|1974-12-24|1977-05-20|Jeumont Schneider|
    DE2923585C2|1979-06-11|1981-03-12|Siemens Ag, 1000 Berlin Und 8000 Muenchen, De|
    US4667149A|1983-05-31|1987-05-19|American Telephone And Telegraph Company, At&T Bell Laboratories|Precision nondestructive testing of metals|
    JP3922728B2|1993-02-01|2007-05-30|住友電気工業株式会社|Metal-coated superconducting wire manufacturing method and electropolishing apparatus|
    DE102010011536A1|2009-09-10|2011-03-24|Zenergy Power Gmbh|Method and apparatus for quality control of superconducting tapes|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014014781.9A|DE102014014781A1|2014-10-10|2014-10-10|Method and device for determining the specific length resistance of a multi-wire cable|
    PCT/EP2015/001780|WO2016055134A1|2014-10-10|2015-09-04|Method and device for determining the specific length resistance of a multi-stranded line|
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