Coupling capacitance estimation method and device, method for determining correspondence relation of end portion of multi-core cable, and method for manufacturing multi-core cable assembly

Abstract

The present application provides a coupling capacitance estimation method capable of estimating coupling capacitance between mutually opposing input electrodes and first exposed end portions and coupling capacitance between mutually opposing output electrodes and second exposed end portions. Among a predetermined plurality of combinations of input electrodes that input a measurement input signal and output electrodes that output a measurement output signal, the following processes are performed: measuring voltage values of measurement output signals output from second exposed end portions of a plurality of insulated electric wires through output electrodes by capacitive coupling when measurement input signals are input from input electrodes to first exposed end portions of the plurality of insulated electric wires by capacitive coupling; and estimating each coupling capacitance between mutually opposing input electrodes and the plurality of first exposed end portions and each coupling capacitance between mutually opposing output electrodes and the plurality of second exposed end portions based on the measured voltage values of the plurality of measurement output signals.

Description

Technical Field

[0001] This invention relates to a method for estimating coupling capacitance, a method for determining the correspondence between the ends of a multi-core cable, a device for estimating coupling capacitance, and a method for manufacturing a multi-core cable assembly. Background Technology

[0002] Traditionally, multi-core cables, which cover multiple insulated wires together with an outer sheath (jacket), have been used in medical devices such as gastroscopes and ultrasound diagnostic devices, and contain hundreds of insulated wires within the sheath. These multi-core cables have multiple first exposed ends protruding from the sheath to one side and multiple second exposed ends protruding from the sheath to the other side. The multiple first exposed ends and multiple second exposed ends are electrically connected to connected components such as connectors and circuit boards.

[0003] In order to ensure that the electrical connection between the multi-core cable and the connected components such as connectors and circuit boards at both ends of the multi-core cable is appropriate, it is necessary to predetermine the correspondence between multiple first exposed ends and multiple second exposed ends, that is, which first exposed end is connected to which second exposed end.

[0004] Therefore, Patent Document 1 discloses a method in which a check signal is input one by one to a plurality of first exposed ends, and a second exposed end from which the check signal is output is determined, thereby electrically determining the corresponding first exposed end and second exposed end. In the method described in Patent Document 1, an input electrode is disposed on the insulating film of each first exposed end, and an output electrode is disposed on the insulating film of each second exposed end. Furthermore, an AC check signal is input from the input electrode to the first exposed end via capacitive coupling, and an AC check output is output from the second exposed end to the output electrode via capacitive coupling. This allows for non-contact electrical connection of each electrode to the conductor portion of the insulated wire, enabling quick and easy determination of the correspondence between the first exposed end and the second exposed end.

[0005] However, in multi-core cables with high-density insulated wires inside the outer sheath, when an AC inspection signal is input to the conductor portion of the insulated wires, crosstalk between the insulated wires can easily increase, potentially making it impossible to accurately determine the correspondence between the first exposed end and the second exposed end.

[0006] Therefore, in the method described in Patent Document 1, an inspection input signal is input from the input electrode to the first exposed end that is to be inspected, and an auxiliary signal with an opposite phase to the specific input signal is input to the first exposed end other than the first exposed end that is to be inspected. Then, based on the voltage value of the output signal output from each of the second exposed ends via capacitive coupling at this time, the correspondence between the first exposed end and the second exposed end is determined. Patent Document 1 describes that, by using this method, the influence of crosstalk can be suppressed when determining the correspondence between the first exposed end and the second exposed end.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2019-120608 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] However, the coupling capacitance between the multiple insulated wires facing each other and the electrodes (i.e., the input and output electrodes) may deviate. The main reasons for this deviation in coupling capacitance are explained below.

[0012] For example, if the diameters of multiple insulated wires deviate due to tolerances, the spacing between the opposing insulated wires and the electrodes will also deviate, resulting in a deviation in the coupling capacitance between the opposing insulated wires and the electrodes. Furthermore, if the relative position of a portion of the insulated wires and the electrodes shifts in a direction orthogonal to the length of the insulated wires, the opposing area of ​​that portion of the insulated wires and the electrodes decreases, resulting in a deviation in the coupling capacitance between the opposing insulated wires and the electrodes. Moreover, if foreign matter enters between a portion of the insulated wires and the electrodes, the spacing between that portion of the insulated wires and the electrodes increases, resulting in a deviation in the coupling capacitance between the opposing insulated wires and the electrodes.

[0013] Therefore, it is useful to know in advance the coupling capacitance between multiple insulated wires and electrodes that are opposite each other, but this is not mentioned in Patent Document 1, and there is room for improvement.

[0014] The present invention was made in view of the above circumstances, and its object is to provide a method for estimating the coupling capacitance between mutually opposed input electrodes and a first exposed end, and the coupling capacitance between mutually opposed output electrodes and a second exposed end, a method for determining the correspondence between the ends of a multi-core cable, a coupling capacitance estimation device, and a method for manufacturing a multi-core cable assembly.

[0015] Methods for solving problems

[0016] To achieve the above objective, the present invention provides a coupling capacitance estimation method, wherein multiple input electrodes are respectively positioned opposite each first exposed end of multiple insulated wires exposed at one end of a multi-core cable, and multiple output electrodes are respectively positioned opposite each second exposed end of the multiple insulated wires exposed at the other end of the multi-core cable. In a predetermined plurality of combinations of input electrodes for inputting a measurement input signal and output electrodes for outputting the measurement output signal, the following steps are performed: measuring the voltage value of the measurement output signal output from the second exposed end through the output electrode via capacitive coupling when the measurement input signal is input from the input electrode to the first exposed end via capacitive coupling; and estimating, based on the measured voltage values ​​of the plurality of measurement output signals, the coupling capacitances between the mutually opposed input electrodes and the plurality of first exposed ends, and the coupling capacitances between the mutually opposed output electrodes and the plurality of second exposed ends.

[0017] In addition, to achieve the aforementioned objective, the present invention provides a method for determining the correspondence of the ends of a multi-core cable. This method uses the coupling capacitance estimation method to determine the correspondence between a plurality of first exposed ends and a plurality of second exposed ends. Specifically, a specific input signal is input from the input electrode to one of the plurality of first exposed ends that is a specific object on the input side via capacitive coupling. An auxiliary signal with an opposite phase to the specific input signal is also input from the input electrode to the first exposed ends other than the first exposed ends that are specific objects on the input side via capacitive coupling. The voltage values ​​of specific output signals output from the plurality of second exposed ends through the output electrode are measured via capacitive coupling. The voltage values ​​of each specific output signal measured at the plurality of second exposed ends are multiplied by a correction coefficient calculated using the estimated value of the coupling capacitance estimated by the coupling capacitance estimation method, thereby calculating a correction voltage value. Based on the calculated correction voltage value, the second exposed end corresponding to the first exposed end of the specific object on the input side is determined.

[0018] In addition, to achieve the above objective, the present invention provides a coupling capacitance estimation device comprising: a plurality of input electrodes respectively disposed opposite to first exposed ends of a plurality of insulated wires exposed at one end of a multi-core cable; a plurality of output electrodes respectively disposed opposite to second exposed ends of the plurality of insulated wires exposed at the other end of the multi-core cable; a measuring unit that, in a predetermined plurality of combinations of the input electrodes for inputting a measuring input signal and the output electrodes for outputting a measuring output signal, performs the following steps: measuring the voltage value of the measuring output signal output from the second exposed end through the output electrodes via capacitive coupling when the measuring input signal is input from the input electrodes to the first exposed ends via capacitive coupling; and an estimation unit that, based on the voltage values ​​of the plurality of measuring output signals measured in the measuring unit, estimates each coupling capacitance between the plurality of opposing input electrodes and the plurality of first exposed ends and each coupling capacitance between the plurality of opposing output electrodes and the plurality of second exposed ends.

[0019] Furthermore, to achieve the above objectives, the present invention provides a method for manufacturing a multi-core cable assembly, the multi-core cable assembly comprising: a multi-core cable having a plurality of insulated wires and an outer sheath covering the plurality of insulated wires; a first connecting member electrically connected to a first exposed end of the plurality of insulated wires protruding from the outer sheath at one end of the multi-core cable; and a second connecting member electrically connected to a second exposed end of the plurality of insulated wires protruding from the outer sheath at the other end of the multi-core cable, wherein the method for manufacturing the multi-core cable assembly includes: a determining step, determining which of the plurality of first exposed ends is a specific target and which of the first exposed ends is connected to the first exposed end of the plurality of insulated wires. The second exposed end corresponds to the connection process. Based on the determination results of the plurality of first exposed ends and the plurality of second exposed ends in the determination process, the plurality of first exposed ends are electrically connected to the first connected component, and the plurality of second exposed ends are electrically connected to the second connected component. In the determination process, the plurality of input electrodes are respectively opposed to each of the plurality of first exposed ends, and the plurality of output electrodes are respectively opposed to each of the plurality of second exposed ends. In a predetermined plurality of combinations of input electrodes that input measurement input signals and output electrodes that output measurement output signals, the following process is performed: measuring the signal obtained by passing through... When the measured input signal is input from the input electrode to the first exposed end via capacitive coupling, the voltage value of the measured output signal output from the second exposed end via the output electrode via capacitive coupling is estimated. Based on the voltage values ​​of the multiple measured output signals, each coupling capacitor between the multiple opposing input electrodes and the multiple first exposed ends and each coupling capacitor between the multiple opposing output electrodes and the multiple second exposed ends are estimated. A specific input signal is input from the input electrode to the first exposed end that is the input-side specific object among the multiple first exposed ends via capacitive coupling, and an auxiliary signal with an opposite phase to the specific input signal is input from the input electrode to the first exposed end other than the first exposed end that is the input-side specific object among the multiple first exposed ends via capacitive coupling. The voltage values ​​of the specific output signals output from the multiple second exposed ends via the output electrode via capacitive coupling are measured. The voltage values ​​of the specific output signals measured at the multiple second exposed ends are multiplied by a correction coefficient calculated using the estimated value of the estimated coupling capacitor, thereby calculating a correction voltage value. Based on the calculated correction voltage value, the second exposed end corresponding to the first exposed end of the input-side specific object is determined.

[0020] Invention Effects

[0021] According to the present invention, a method for estimating coupling capacitances between a plurality of mutually opposed input electrodes and a plurality of first exposed ends and between a plurality of mutually opposed output electrodes and a plurality of second exposed ends, a method for determining the correspondence between the ends of a multi-core cable, a coupling capacitance estimation device, and a method for manufacturing a multi-core cable assembly are provided. Attached Figure Description

[0022] Figure 1 This is a schematic top view of the multi-core cable in the first embodiment.

[0023] Figure 2 This is a schematic cross-sectional view of the multi-core cable in the first embodiment.

[0024] Figure 3 This is a schematic cross-sectional view of the insulated wire in the first embodiment.

[0025] Figure 4 This is a schematic overall structural diagram of the inspection device in the first embodiment.

[0026] Figure 5 This is a schematic top view showing the plurality of first exposed ends fixed to the inspection table and the input substrate in the first embodiment.

[0027] Figure 6 This is a schematic perspective view showing the plurality of first exposed ends fixed to the inspection table and the input substrate in the first embodiment.

[0028] Figure 7 This is a schematic cross-sectional view of the inspection table, multiple insulated wires, and input board in the normal state of the first embodiment.

[0029] Figure 8 This is a schematic cross-sectional view of the inspection table, the multiple insulated wires, and the input substrate in the case where the diameter of a portion of the multiple insulated wires is formed to be relatively small, as described in the first embodiment.

[0030] Figure 9 This is a schematic cross-sectional view of the inspection table, the multiple insulated wires, and the input substrate, in the case where the relative positions of the arrangement directions of a portion of the multiple insulated wires and the input electrode have shifted in the first embodiment.

[0031] Figure 10 It is an equivalent circuit diagram of a simplified model in the first embodiment used to calculate the theoretical value of the voltage value of the measurement output signal measured by the first measurement unit.

[0032] Figure 11It is an equivalent circuit diagram of a simplified model used in the first embodiment to calculate the theoretical value of the voltage value of a specific output signal measured by the second measuring unit.

[0033] Figure 12 It is the method used in the first embodiment for calculating voltage v a1-m2-b1 The equivalent circuit diagram of the simplified model.

[0034] Figure 13 It is the method used in the first embodiment for calculating voltage v a1-m2-b3 The equivalent circuit diagram of the simplified model.

[0035] Figure 14 Yes Figure 13 The circuit diagram after performing a Δ-Y transformation on the original circuit diagram.

[0036] Figure 15 This is a flowchart of the estimation of the coupling capacitor in the first embodiment.

[0037] Figure 16 This is a flowchart illustrating the method for determining the correspondence between a plurality of first exposed ends and a plurality of second exposed ends in the first embodiment.

[0038] Figure 17 This is a flowchart illustrating the method for determining the correspondence between a plurality of first exposed ends and a plurality of second exposed ends in the first embodiment. Figure 16 A diagram of the subsequent processes shown in the diagram.

[0039] Explanation of reference numerals in the attached figures

[0040] 242…Input Electrode

[0041] 412… Output electrode

[0042] 611…First Measurement Unit

[0043] 612…Estimated Unit

[0044] 8… Multi-core cable

[0045] 81…outer skin

[0046] 82… Insulated wire

[0047] 821…First exposed end

[0048] 822…Second exposed end. Detailed Implementation

[0049] [First Implementation Method]

[0050] Reference Figures 1 to 15The first embodiment of the present invention will be described. Furthermore, the embodiments described below are shown as preferred specific examples for carrying out the present invention, and there are also parts that specifically illustrate various technically preferred aspects; however, the technical scope of the present invention is not limited to these specific embodiments.

[0051] (Multi-core cable 8)

[0052] Figure 1 This is a schematic top view of a multi-core cable 8. Figure 2 This is a schematic cross-sectional view of a multi-core cable 8. Figure 3 This is a schematic cross-sectional view of insulated wire 82. (For example...) Figure 1 and Figure 2 As shown, the multi-core cable 8 has an outer sheath 81 and multiple insulated wires 82 covered by the outer sheath 81. As... Figure 1 As shown, the insulated wire 82 has a first exposed end 821 protruding from the outer sheath 81 to one side and a second exposed end 822 protruding from the outer sheath 81 to the other side. Figure 2 As shown, multiple insulated wires 82 are covered by a shielding part 83 such as a braided shielding part, and the shielding part 83 is covered by the outermost sheath 81 that constitutes the multi-core cable 8.

[0053] like Figure 3 As shown, the insulated wire 82 is a coaxial cable with an insulator 824, an outer conductor 825, and a sheath 826 sequentially arranged around the outer periphery of the center conductor 823. However, it is not limited to this; the insulated wire 82 may also be an insulated wire without an insulator 824 and an outer conductor 825. The insulated wire 82 of this type is an extremely fine wire with an outer diameter of, for example, 0.2 mm or more and 0.5 mm or less.

[0054] The outer diameter of the multi-core cable 8, i.e., the outer diameter of the outer sheath 81, is, for example, about 10 mm. The multi-core cable 8 has three or more insulated wires 82. Preferably, the multi-core cable 8 has 20 or more insulated wires 82, more preferably 100 or more insulated wires 82. If the number of insulated wires 82 is 20 or more, it is difficult to distinguish the multiple insulated wires 82 by color when determining the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 of the multi-core cable 8. Therefore, as will be described later, it is better to determine the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 electrically. Furthermore, if the number of insulated wires 82 is 100 or more, the density of the insulated wires 82 inside the outer sheath 81 increases, increasing concerns about crosstalk. Therefore, without special effort, it is difficult to improve the accuracy of determining the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822. As will be described later, according to this method, the accuracy of determining the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822 can be improved, and therefore it is more effective when there are 100 or more insulated wires 82. In this method, for example, 100 or more but less than 300 insulated wires 82 are twisted together inside the outer sheath 81 in a multi-core cable 8.

[0055] (Inspection device 1 for multi-core cable 8)

[0056] Figure 4 This is a schematic overall structural diagram of the inspection device 1. The inspection device 1 for the multi-core cable 8 is used to determine the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 of the multi-core cable 8. That is, since the multi-core cable 8 has multiple insulated wires 82 arranged inside the outer sheath 81, it is difficult to determine which first exposed end 821 is connected to which second exposed end 822 (i.e., the correspondence). However, the inspection device 1 of this type can determine the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 with high accuracy.

[0057] Furthermore, based on the determined correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822, the plurality of first exposed ends 821 of the multi-core cable 8 are electrically connected to appropriate locations of the first connected component, and the plurality of second exposed ends 822 are electrically connected to appropriate locations of the second connected component, thereby obtaining a multi-core cable assembly. One of the first and second connected components can be, for example, a connector having multiple terminals for electrically connecting multiple insulated wires, and the other can be a circuit board having multiple patterns for electrically connecting multiple insulated wires. In addition, the multi-core cable assembly can be used to construct medical devices such as gastroscopes and ultrasound diagnostic devices.

[0058] The inspection device 1 for the multi-core cable 8 includes a main input circuit 2, an auxiliary input circuit 3, an output circuit 4, a reference signal generation circuit 5, and a control device 6. The following is a detailed description of each structural element.

[0059] (Main Input Circuit 2)

[0060] The main input circuit 2 includes a voltage source 21, a main amplifier 22, a main input switching device 23, and an input board 24. The voltage source 21 is an AC power supply. Furthermore, in... Figure 4 In the figure, the internal resistance of voltage source 21 is indicated by reference numeral r. Main amplifier 22 amplifies the output of voltage source 21 to generate a main input signal V+ input to insulated wire 82. The main input signal V+ is a measured input signal or a specific input signal. As described later, the measured input signal is determined by the respective coupling capacitors C between the plurality of input electrodes 242 and the plurality of first exposed ends 821. px and the coupling capacitors C between the multiple output electrodes 412 and the multiple second exposed ends 822. qx The signal is input to the first exposed end 821. Additionally, the coupling capacitor C... px Coupling capacitor C qx The notation x refers to values ​​from 1 up to the total number n of insulated wires 82. A specific input signal is the signal input to the first exposed end 821 when determining the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822. The frequency of the main input signal V+ needs to be set to a frequency lower than the resonant frequency in the multi-core cable 8, and can be appropriately set according to the construction of the multi-core cable 8, etc. In this embodiment, the frequency of the main input signal V+ is, for example, 10MHz or less; specifically, a 2.5MHz main input signal V+ is used.

[0061] The main input switching devices 23 are configured in the same number as the multiple insulated wires 82. The multiple main input switching devices 23 are connected in parallel with the main amplifier 22. By appropriately adjusting the on / off states of each of the multiple main input switching devices 23, the main input signal V+ is input only to the desired insulated wire 82. The sides of the multiple main input switching devices 23 opposite to the voltage source 21 are electrically connected to different input electrodes 242 on the input substrate 24.

[0062] Figure 5 This is a schematic top view showing the plurality of first exposed ends 821 fixed to the inspection table 7 and the input substrate 24. Figure 6This is a schematic perspective view showing the plurality of first exposed ends 821 fixed to the inspection table 7 and the input substrate 24. The input substrate 24 includes an electrically insulating substrate 241 and input electrodes 242 formed by wiring patterns formed on the substrate 241. At least the same number of input electrodes 242 as the insulated wires 82 are formed at equal intervals on the substrate 241. The electrode surfaces 242a of each input electrode 242 opposite to the substrate 241 are designed to be arranged on the same plane. The electrode surfaces 242a of the plurality of input electrodes 242 on the input substrate 24 are pressed towards the plurality of first exposed ends 821 arranged as described later. Then, through capacitive coupling, the main input signal V+ is input from the input electrode 242 connected to the main input switch device 23 in the ON state to the insulated wires 82 through the first exposed ends 821 opposite to the input electrode 242.

[0063] like Figure 5 and Figure 6 As shown, multiple first exposed ends 821 are fixed to the inspection table 7 in an arranged manner. The inspection table 7 includes a base 71 and positioning walls 72 erected upward from the upper surface 711 of the base. Multiple positioning walls 72 are arranged at predetermined intervals along the arrangement direction X of the first exposed ends 821, and the first exposed ends 821 are positioned between adjacent positioning walls 72 in the arrangement direction X. The positioning walls 72 position the first exposed ends 821 at two locations along the longitudinal direction Y, which is parallel to the upper surface 711 of the base and orthogonal to the arrangement direction X. The two positioning walls 72 at the longitudinal direction Y are opposite each other in the longitudinal direction Y. Furthermore, the construction for fixing the insulated wire 82 to the inspection table 7 is not limited to this; for example, adhesive tape such as double-sided tape can be used to adhesively fix the insulated wire 82 to the upper surface 711 of the base. In addition, in this embodiment, the first exposed ends 821 are arranged at equal intervals in one direction, but the arrangement of the first exposed ends 821 toward the upper surface 711 of the base can be appropriately modified.

[0064] like Figure 6 As shown, each input electrode 242 of the input substrate 24 is pressed against a first exposed end 821 located between two positioning walls 72 disposed in the longitudinal Y direction. In this state, if a main input signal V+ is input to a predetermined input electrode 242, the main input signal V+ is input to the insulated wire 82 via capacitive coupling from the first exposed end 821 opposite to the input electrode 242. Furthermore, in this configuration, since a coaxial cable is used as the insulated wire 82, the main input signal V+ is input to the outer conductor 825 of the insulated wire 82.

[0065] Figure 7 This is a schematic cross-sectional view of the inspection table 7, multiple insulated wires 82, and input board 24 in normal condition. Figure 8This is a schematic cross-sectional view of the inspection table 7, the multiple insulated wires 82, and the input substrate 24, in the case where the diameter of a portion of the multiple insulated wires 82 is formed to be smaller. Figure 9 This is a schematic cross-sectional view of the inspection table 7, the multiple insulated wires 82, and the input substrate 24, in the case where the relative position of the arrangement direction X between a portion of the multiple insulated wires 82 and the input electrode 242 is offset.

[0066] Here, as Figure 7 As shown, each insulated wire 82 is manufactured to have the same diameter and is configured to be housed in the electrode surface region ER of the electrode surface 242a of the opposing input electrode 242 in the arrangement direction X.

[0067] However, as described above, each insulated wire 82 is an extremely fine wire, and their diameters may vary due to manufacturing errors. In this case, such as Figure 8 As shown, a gap is formed between the first exposed end 821 of the smaller-diameter insulated wire 82 and the input electrode 242 opposite to the first exposed end 821. Therefore, the coupling capacitance between the first exposed end 821 of the smaller-diameter insulated wire 82 and the input electrode 242 opposite to the first exposed end 821 is smaller than the coupling capacitance between the other first exposed ends 821 and the input electrode 242 opposite to the first exposed end.

[0068] In addition, such as Figure 9 As shown, due to assembly errors such as when the first exposed end 821 is positioned on the inspection table 7, it is also conceivable that a portion of the first exposed ends 821a among the plurality of first exposed ends 821 may be arranged to extend from the electrode surface region ER in the arrangement direction X. In this case, the opposing area between the first exposed end 821a and the input electrode 242 is reduced by the amount of extension from the electrode surface region ER, and the coupling capacitance between the first exposed end 821a and the input electrode 242 is reduced.

[0069] For the reasons described above, the coupling capacitances between the plurality of first exposed ends 821 and the plurality of input electrodes 242 may deviate, potentially adversely affecting the determination of the first exposed ends 821 and second exposed ends 822 among the plurality of insulated wires 82. The same applies to the relationship between the second exposed end 822 and the output electrode 412, which will be described later.

[0070] (Auxiliary input circuit 3)

[0071] The auxiliary input circuit 3 is a circuit used to input the auxiliary signal V- (described later) to the first exposed ends 821 other than the first exposed ends 821 into which a specific input signal is input, via capacitive coupling. For example... Figure 4 As shown, the auxiliary input circuit 3 includes a phase inverter 31, an auxiliary amplifier 32, and an auxiliary switching device 33.

[0072] Phase inverter 31 is connected in parallel with main amplifier 22 to voltage source 21. Phase inverter 31 is composed of a phase shifter that shifts the phase of the output of voltage source 21 by 180 degrees. Auxiliary amplifier 32 amplifies the output of phase inverter 31 to generate auxiliary signal V-.

[0073] The auxiliary switching devices 33 are arranged in the same number as the multiple insulated wires 82. The multiple auxiliary switching devices 33 are connected in parallel with the auxiliary amplifier 32. By appropriately adjusting the on / off states of each of the multiple auxiliary switching devices 33, an auxiliary signal V- is input only to predetermined insulated wires 82 other than those to which a specific input signal is input. Thus, as disclosed in Japanese Patent Application Publication No. 2019-120608, when determining the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822, the accuracy of determining the correspondence is improved by inputting the auxiliary signal V-, which is different from the specific input signal, to the insulated wires 82. The input electrodes 242 of the multiple auxiliary switching devices 33, which are opposite to the voltage source 21, are electrically connected to the input substrate 24.

[0074] Furthermore, in this method, the auxiliary signal V- is generated by reversing the phase of the voltage source 21 of the main input circuit 2, but it is not limited to this; a voltage source 21 for generating the auxiliary signal V- may also be used. Additionally, in this method, an opposite-phase check signal is input to the insulated wire 82 via the input board 24, but it is not limited to this; a board for inputting the auxiliary signal V- may also be used.

[0075] (Output Circuit 4)

[0076] The output circuit 4 includes an output substrate 41, an output switching device 42, an output amplifier 43, a multiplier 44, a low-pass filter 45, and a load resistor 46. The output substrate 41 includes a substrate 411 and output electrodes 412 formed by wiring patterns formed on the substrate 411. The structure of the output substrate 41 is the same as that of the input substrate 24; repeated descriptions are omitted as appropriate. Figure 5 and Figure 6Similarly, in the structure shown, with regard to the output substrate 41, each output electrode 412 is pressed towards and towards the second exposed ends 822 of the multiple insulated wires 82 arranged therein. The multiple second exposed ends 822 are fixed on the same inspection table as the inspection table 7 described above, in the same arrangement as the multiple first exposed ends 821. Furthermore, through capacitive coupling, an output signal (a signal output from the input electrode 242 through the outer conductor 825 of the insulated wires 82) is output from the output electrode 412. The multiple output electrodes 412 are electrically connected to the output switching device 42.

[0077] like Figure 4 As shown, the output switching devices 42 are configured in the same number as the multiple insulated wires 82. The multiple output switching devices 42 are electrically connected to different output electrodes 412. By appropriately adjusting the on / off state of each of the multiple output switching devices 42, a signal is output only from the desired insulated wire 82. The output side of each of the multiple output switching devices 42 is connected in parallel with an output amplifier 43. The output amplifier 43 amplifies the signal output from the on-state output switching device 42 and outputs it to the multiplier 44.

[0078] Multiplier 44 is a mixer that multiplies the output from output electrode 412 with the output of reference signal generation circuit 5. Reference signal generation circuit 5 generates a reference signal in phase with the signal output from output electrode 412. Multiplier 44 multiplies this in-phase signal from output electrode 412 with the output signal from reference signal generation circuit 5. Multiplying the in-phase signal from output electrode 412 with the output signal from reference signal generation circuit 5 by multiplier 44 produces a DC component and a component with a frequency twice that of the signal output from output electrode 412. Therefore, the low-pass filter 45, which receives the output signal from multiplier 44, removes this twice-frequency component, outputting only the DC component.

[0079] The output signal of the low-pass filter 45 is output to the load resistor 46. In this configuration, the signal applied to the load resistor 46 is either a specific output signal or a measured output signal. The measured output signal is a coupling capacitor C between the plurality of supposedly mutually opposed input electrodes 242 and the plurality of first exposed ends 821. px and the coupling capacitors C between the multiple output electrodes 412 that are opposed to each other and the multiple second exposed ends 822. qxThe signal is output from the second exposed end 822. The specific output signal is the signal output from the second exposed end 822 when determining the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822. The specific output signal output from the load resistor 46 or the information of measuring the voltage value of the output signal (the potential difference across the load resistor 46) is sent to the control device 6.

[0080] (Refer to signal generation circuit 5)

[0081] The reference signal generation circuit 5 includes a reference phase shifter 51 and a reference amplifier 52. The reference phase shifter 51 is connected in parallel with the main amplifier 22 and the auxiliary input circuit 3 to the voltage source 21. The reference phase shifter 51 adjusts the phase of the output voltage of the voltage source 21. The reference amplifier 52 amplifies the output of the reference phase shifter 51 to generate the reference signal v. ref The reference signal v output from reference amplifier 52 ref The signal is input to multiplier 44. That is, the reference signal generation circuit 5 considers the capacitive coupling between the opposing electrodes (input electrode 242 and output electrode 412) and the insulated wire 82, as well as the phase shift of the signal as it propagates in the multi-core cable 8. In multiplier 44, the signal output from output electrode 412 and input to multiplier 44 is compared with the reference signal v output from reference amplifier 52. ref The reference signal v is generated in phase. ref .

[0082] (Control device 6)

[0083] The control device 6 includes: a control unit 61, which includes a CPU (Arithmetic Processing Unit) and RAM, which serves as the processing area when the CPU operates; and a storage unit 62, which includes ROM, a hard disk, etc. The control unit 61 includes a first measurement unit 611, an estimation unit 612, a second measurement unit 613, a correspondence determination unit 614, and a false detection determination unit 615. The control unit 61 executes a program stored in the storage unit 62 via the CPU, thereby realizing the functions of the first measurement unit 611, the estimation unit 612, the second measurement unit 613, the correspondence determination unit 614, and the false detection determination unit 615.

[0084] The first measuring unit 611 controls the on / off states of multiple main input switching devices 23 and multiple output switching devices 42. A measuring input signal, serving as the main input signal V+, is input from a predetermined input electrode 242 among multiple input electrodes 242 to the first exposed end 821 via capacitive coupling. A measuring output signal is output from a predetermined second exposed end 822 among multiple second exposed ends 822 via capacitive coupling through the output electrode 412, and the voltage value of this measuring output signal is measured. Furthermore, the first measuring unit 611 performs the aforementioned measurement of the voltage value of the measuring output signal in multiple predetermined combinations of input electrodes 242 that input the measuring input signal and output electrodes 412 that output the measuring output signal. These multiple predetermined combinations will be described later. The measurement of the measuring output signal in the first measuring unit 611 is performed with all auxiliary switching devices 33 in the off state.

[0085] Based on the measured voltage values ​​of multiple measurement output signals, the estimation unit 612 estimates the respective coupling capacitance C between the multiple opposing input electrodes 242 and the multiple first exposed ends 821. px And the respective coupling capacitance C between the multiple output electrodes 412 that are opposed to each other and the multiple second exposed ends 822. qx The theory behind the estimation of various coupling capacitors by estimation unit 612 will be described later.

[0086] The second measuring unit 613 controls the on / off states of multiple main input switching devices 23 and multiple auxiliary switching devices 33, inputting a specific input signal as the main input signal V+ to the first exposed end 821 of a corresponding specific object (hereinafter referred to as the input-side specific object) in the first exposed end 821, and inputting an auxiliary signal V- to another first exposed end 821. Simultaneously, the second measuring unit 613 controls the on / off states of multiple output switches, outputting a specific output signal through the output electrode 412 from the second exposed end 822 of a corresponding specific object (hereinafter referred to as the output-side specific object) in the multiple second exposed ends 822 via capacitive coupling, and measuring the voltage value of the specific output signal. The second measuring unit 613 keeps the first exposed end 821 for inputting the specific input signal and the other first exposed ends 821 for inputting the auxiliary signal V- unchanged, while sequentially changing the second exposed ends 822 for outputting the specific output signal, measuring the voltage value of the specific output signal until the specific output signal is output through all second exposed ends 822. Furthermore, the second measurement unit 613 repeatedly measures the voltage value of the specific output signal as described above while changing the first exposed end 821 of the input auxiliary signal V- and the input specific input signal, until the plurality of first exposed ends 821 become specific objects on the input side.

[0087] The correspondence determination unit 614 determines the correspondence between a plurality of first exposed ends 821 and a plurality of second exposed ends 822. The correspondence determination unit 614 calculates a correction voltage value by multiplying the voltage value of each specific output signal measured by the second measurement unit 613 by a correction coefficient. Details of the calculation method for the correction voltage value will be described later. For one first exposed end 821 that is a specific object on the input side, the correspondence determination unit 614 determines the largest correction voltage value among the correction voltage values ​​calculated based on specific output signals output from all the second exposed ends 822. Then, the correspondence determination unit 614 determines the second exposed end 822 that outputs the specific output signal that forms the basis for calculating the largest correction voltage value as the second exposed end 822 corresponding to the first exposed end 821 that is a specific object on the input side. The correspondence determination unit 614 performs this determination on all first exposed ends 821, determines all correspondences between the plurality of first exposed ends 821 and the plurality of second exposed ends 822, and stores them in the storage unit 62. The correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822 is stored in the storage unit 62, for example, based on the numbering assigned sequentially to the plurality of first exposed ends 821 arranged on the input substrate 24 and the numbering assigned sequentially to the plurality of second exposed ends 822 arranged on the output substrate 41.

[0088] The false detection determination unit 615 determines whether there is an error in the determination result of the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822. Referring to the correspondence between the first exposed ends 821 and the second exposed ends 822 stored in the storage unit 62, the false detection determination unit 615 determines that a false detection exists if it determines that the plurality of first exposed ends 821 correspond to the same second exposed end 822. Then, if the false detection determination unit 615 determines that a false detection exists in the determination of the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822, it uses the correspondence determination unit 614 to re-determine the corresponding second exposed ends 822 only for the plurality of falsely detected first exposed ends 821. At this time, the auxiliary signal V- is input to the first exposed ends 821 that are different from the first exposed ends 821 to which the auxiliary signal V- was input when the correspondence determination unit 614 determined the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822 last time. This process is repeated until no false detection is found.

[0089] (Theory related to the processing performed by estimation unit 612)

[0090] The estimation unit 612 estimates the coupling capacitance C between the plurality of mutually opposing input electrodes 242 and the plurality of first exposed ends 821. px and the coupling capacitors C between the multiple output electrodes 412 that are opposed to each other and the multiple second exposed ends 822. qx The underlying theory of the treatment is explained.

[0091] Figure 10 This is an equivalent circuit diagram of a simplified model used to calculate the theoretical value of the voltage value v of the measurement output signal measured by the first measurement unit 611. For convenience, the following will be... Figure 10 The three insulated wires shown are from 82 Figure 10 From the side of the paper, they are sequentially referred to as the first insulated wire 82a, the second insulated wire 82b, and the third insulated wire 82c. Furthermore, the main input switch device 23, electrically connected to the input electrode 242 opposite to the first insulated wire 82a, is designated as the main input switch device SW. a1 The output switch device 42, which is electrically connected to the output electrode 412 opposite to the first insulated wire 82a, is designated as the output switch device SW. b1 Additionally, the main input switch device 23, which is electrically connected to the input electrode 242 opposite to the second insulated wire 82b, is designated as the main input switch device SW. a2 The output switch device 42, which is electrically connected to the output electrode 412 opposite to the second insulated wire 82b, is designated as the output switch device SW. b2Additionally, the main input switch device 23, which is electrically connected to the input electrode 242 opposite to the third insulated wire 82c, is designated as the main input switch device SW. a3 The output switch device 42, which is electrically connected to the output electrode 412 opposite to the third insulated wire 82c, is designated as the output switch device SW. b3 Furthermore, in the method for calculating the voltage value of the measurement output signal measured by the first measuring unit 611, for Figure 10 The insulated wires other than the insulated wire 82 shown in the diagram are calculated using the same method as the voltage value of the measured output signal output from the third insulated wire 82c. Therefore, in Figure 10 In the text, it refers only to three insulated wires 82a, 82b, and 82c out of the multiple insulated wires 82.

[0092] In addition, Figure 10 In this context, the coupling capacitance between the first exposed end 821 of the first insulated wire 82a and the input electrode 242 is set as C. p1 The coupling capacitance between the first exposed end 821 of the second insulated wire 82b and the input electrode 242 is set as C. p2 The coupling capacitance between the first exposed end 821 of the third insulated wire 82c and the input electrode 242 is set as C. p3 Furthermore, the coupling capacitance between the second exposed end 822 of the first insulated wire 82a and the output electrode 412 is set to C. q1 The coupling capacitance between the second exposed end 822 of the second insulated wire 82b and the output electrode 412 is set as C. q2 The coupling capacitance between the second exposed end 822 of the third insulated wire 82c and the output electrode 412 is set as C. q3 Furthermore, the coupling capacitance between the first insulated wire 82a and the second insulated wire 82b is set as C. α The coupling capacitance between the second insulated wire 82b and the third insulated wire 82c is set as C. β Let the coupling capacitance between the first insulated wire 82a and the third insulated wire 82c be C. γ Additionally, Z in1 Z represents the input impedance when viewed from the output side of voltage source 21. in2 This indicates the input impedance when viewed from the output switch device 42 on the output side.

[0093] In this method, the voltage of the input signal is defined as V+ = v0exp(jωt). Here, v0 represents the voltage amplitude, j represents the imaginary unit, ω represents the angular frequency, and t represents time. Furthermore, in... Figure 10In this context, the voltage of the signal output from the output electrode 412 when the measurement input signal is input to the predetermined insulated wire 82 is represented by v′, the voltage of the signal output from the multiplier 44 is represented by v″, and the voltage of the signal output from the low-pass filter 45, i.e., the measurement output signal, is represented by v.

[0094] First, the voltage of the measured output signal and the average value v shown below are calculated for the following five combinations (i) to (v) in which the input electrode 242 for the input measurement input signal and the output electrode 412 for the output measurement output signal are changed. a1-m0-ave .

[0095] (i) Main input switching device SW a1 and output switching device SW b1 The voltage v of the output signal is measured when the device is in the ON state and all other switching devices are in the OFF state. a1-m0-b1 .

[0096] (ii) Main input switching device SW a2 and output switching device SW b1 The voltage v of the output signal is measured when the device is in the ON state and all other switching devices are in the OFF state. a2-m0-b1 .

[0097] (iii) Main input switching device SW a1 SW a2 and output switching device SW b1 The voltage v of the output signal is measured when the device is in the ON state and all other switching devices are in the OFF state. a1，a2-m0-b1 .

[0098] (iv) Main input switching device SW a1 and output switching device SW b2 The voltage v of the output signal is measured when the device is in the ON state and all other switching devices are in the OFF state. a1-m0-b2 .

[0099] (v) Main input switching device SW a1 and output switching device SW b3 The voltage v of the output signal is measured when the device is in the ON state and all other switching devices are in the OFF state. a1-m0-b3 .

[0100] (vi) Voltage v a1-m0-b1 Voltage v a1-m0-b2 and voltage v a1-m0-b3 average v a1-m0-ave .

[0101] First, calculate the voltage v of the output signal in case (i). a1-m0-b1 The theoretical value.

[0102] exist Figure 10 In the middle, the input impedance Z in1 The following calculations can be performed using communication theory.

[0103] [Formula 1]

[0104]

[0105]

[0106] Here, for the angular frequency ω, each coupling capacitor, and the resistance values ​​r and R, the inequality relationship in equation (2) holds. In equation (2) below, the notation C... a It is the coupling capacitor C p1 C p2 C p3 C q1 C q2 C q3 Any one of them, notated as C b It is the coupling capacitor C α C β C γ Any one of them, notated as R a It is any one of the resistance values ​​r and R.

[0107] [Formula 2]

[0108]

[0109] If equation (2) holds, then equation (3) holds.

[0110] [Formula 3]

[0111]

[0112] If equation (3) is used, then equation (1) can be approximated as in equation (4) below.

[0113] [Formula 4]

[0114]

[0115] Then, as Figure 10 As shown, the signal output from the output electrode 412 is multiplied by the reference signal v through the multiplier 44. ref Multiplication. Here, the reference signal v ref It is represented by the following expression (5).

[0116] [Formula 5]

[0117]

[0118] Additionally, the voltage v′ of the signal output from the output electrode 412 a1-m0-b1 As shown in equation (6) below.

[0119] [Formula 6]

[0120]

[0121] At this time, the voltage v″ of the signal output from multiplier 44 a1-m0-b1 As shown in equation (7) below. The u[-] defined in the following equation is obtained by... r The dimensionless value is [V] divided by 1[V].

[0122] [Formula 7]

[0123]

[0124]

[0125] Furthermore, the voltage v of the output signal measured from the low-pass filter 45 a1-m0-b1 The result is obtained by retaining only the DC component in equation (7), as shown in equation (8) below.

[0126] [Formula 8]

[0127]

[0128]

[0129] Similarly, for cases (ii) to (vi), the theoretical value of the measured output signal voltage will also be calculated and expressed by the following equations (9) to (13). The C in equation (13) below... qr The voltage of the output signal is measured as the average value v. a1-m0-ave The coupling capacitance between the second exposed end 822 and the output electrode 412.

[0130] [Formula 9]

[0131]

[0132]

[0133]

[0134]

[0135]

[0136] Then, by solving the six simultaneous equations of equations (8) to (13), the six coupling capacitors C are obtained as shown in equations (14) to (19) below. p1 C p2 C q1 C q2 C q3 C qr .

[0137] [Formula 10]

[0138]

[0139]

[0140]

[0141]

[0142]

[0143]

[0144] According to the above theory, as shown in equations (14) to (19), each coupling capacitor is determined by the voltage v of the output signal. a1-m0-b1 v a2-m0-b1 v a1，a2-m0-b1 v a1-m0-b2 v a1-m0-b3 and average value v a1-m0-ave This refers to the measured value from the first measuring unit 611. Therefore, the voltage v of the output signal is measured in advance by the first measuring unit 611. a1-m0-b1 v a2-m0-b1 v a1，a2-m0-b1 v a1-m0-b2 v a1-m0-b3 And calculate the average value v a1-m0-ave Therefore, equations (14) to (19) can be used to estimate each coupling capacitor.

[0145] Furthermore, regarding the coupling capacitances between the plurality of first exposed ends 821 and the plurality of input electrodes 242, other than the coupling capacitances calculated in Equations (14) and (15), it is conceivable that the insulated wires 82 for input measurement input signals are changed sequentially, and the calculations are performed using the same theory as the calculation methods in Equations (14) and (15).

[0146] Here, the accuracy of equations (14) to (19) is determined by comparing them with the simulation results. The various parameters used in the simulation are summarized in Table 1.

[0147] [Table 1]

[0148] (Table 1)

[0149] r[Ω] 50 R[Ω] 50 <![CDATA[v0[V]]]> 1 u[-] 1 ω[Hz] 3.0E+06 <![CDATA[C α [F]]]> 180E-12 <![CDATA[C β [F]]]> 140E-12 <![CDATA[C γ [F]]]> 160E-12

[0150] Furthermore, the simulation results are shown in Table 2 below. In Table 2 below, the estimated value 1 is the result when all the "±" in equations (14) to (19) are "+", and the estimated value 2 is the result when all the "±" in equations (14) to (19) are "-".

[0151] (Table 2)

[0152] Cp1 2.9E-12 ∞ 3.0E-12 4.6 Cp2 2.9E-12 ∞ 3.0E-12 4.6 Ca1 9.8E-14 9.5E-14 1.0E-13 2.1 Cq2 9.8E-13 7.3E-13 1.0E-12 1.6 Cq3 3.0E-12 1.5E-12 3.0E-12 1.5 Car 1.0E-12 7.6E-13 - -

[0153] Regarding the "±" in equations (14) to (19), the estimated value 1 when all "+" are used and the estimated value 2 when all "-" are used take different values ​​as shown in Table 2. Regarding which of the estimated values ​​1 and 2 to use, for example, the estimated value (in this case, estimated value 1) that falls within the range of convergence for all coupling capacitors is selected as the estimated value to be used, based on a pre-predicted range of convergence for each coupling capacitor. The method for pre-determining the convergence range of each coupling capacitor can be, for example, by considering the thickness of the sheath 826 of the insulated wire 82, the relative permittivity of the sheath 826, the area of ​​the electrode (the product of the longitudinal width and the transverse width), and the spacing between the electrode and the insulated wire 82. Furthermore, as shown in Table 2, the error between the estimated value 1 and the measured value is less than 4.6%, allowing for high-precision estimation of each coupling capacitor.

[0154] (Theory related to the processing performed by the corresponding determining unit 614)

[0155] The theory that forms the basis for the process by which the corresponding determination unit 614 determines the correspondence between a plurality of first exposed ends 821 and a plurality of second exposed ends 822 is explained.

[0156] Figure 11 It is an equivalent circuit diagram of a simplified model used to calculate the theoretical value of the voltage of a specific output signal measured by the second measuring unit 613. Figure 11 The three insulated wires shown are Figure 10 The first insulated wire 82a, the second insulated wire 82b, and the third insulated wire 82c are shown. A specific input signal is input to the first insulated wire 82a, an auxiliary signal V- is input to the second insulated wire 82b, and no signal is input to the third insulated wire 82c. Furthermore, in the method for calculating the voltage value of the specific output signal measured by the second measuring unit 613, even for... Figure 11The insulated wire 82 other than the insulated wire 82 shown in the diagram is calculated using the same method as the voltage value of the specific output signal output from the third insulated wire 82c. Therefore, in Figure 11 In the text, it refers only to 3 of the multiple insulated wires 82.

[0157] exist Figure 11 In this context, the voltage of the auxiliary signal V- is set as V-=v0exp{j(ωt+π)}. Additionally, in... Figure 11 In this context, v′ represents the voltage of the signal output from the output electrode 412 when a specific input signal is input to the first insulated wire 82a and an auxiliary signal V- is input to the second insulated wire 82b; v″ represents the voltage of the signal output from the multiplier 44; and v represents the voltage of the signal output from the low-pass filter 45, i.e., the specific output signal. Furthermore, Figure 11 The reference numerals shown in the figures are the same as those in the figures below. Figure 10 The reference numerals in the attached figures are the same.

[0158] Here, when a specific input signal is input to the first exposed end 821 of the first insulated wire 82a and an auxiliary signal V- is input to the first exposed end 821 of the second insulated wire 82b, the voltage value of the specific output signal output through the output electrode 412 from the second exposed end 822 of each of the first insulated wire 82a, the second insulated wire 82b and the third insulated wire 82c via capacitive coupling is theoretically calculated.

[0159] First, a specific input signal is input to the first insulated wire 82a, and an auxiliary signal V- is input to the second insulated wire 82b. The calculation is then performed on the output switching device SW among the multiple output switching devices 42. b1 The voltage v of a specific output signal when set to the ON state. a1-m2-b1 The equivalent circuit at this time is as follows: Figure 12 As shown. Furthermore, in Figure 12 In the state shown, Figure 11 The main input switch device connected to the input electrode 242 opposite to the first insulated wire 82a, the auxiliary switch device connected to the input electrode 242 opposite to the second insulated wire 82b, and the output switch device SW shown are shown. b1 In the ON state, the main input switch, auxiliary switch, and output switch, other than these three switch devices, are in the OFF state.

[0160] according to Figure 12 The equivalent circuit, if calculated using AC theory, shows the voltage v′ of the signal output from output electrode 412. a1-m2-b1 Then it becomes the following equation (20). Furthermore, the notation C in the following equation (20) δ C δ ≡C α+{(C β C γ ) / (C β +C γ )}. In addition, in the following equation (20), the notation “ / / ” is, for example, A / / B=(A×B) / (A+B), which indicates the impedance connected in parallel.

[0161] [Formula 11]

[0162]

[0163] Here, we derive the relation (i.e., equation (23) described later) for easy handling of equation (20). First, we obtain equation (21) below. As mentioned above, notation C a It is the coupling capacitor C p1 C p2 C p3 C q1 C q2 C q3 Any one of them, notated as C b It is the coupling capacitor C α C β C γ Any one of the values ​​in, where Ra is any one of the resistance values ​​r and R. In the transformations of the first and second rows of the following equation (21), the above equation (2) is used.

[0164] [Formula 12]

[0165]

[0166] Here, for the denominator of equation (21) {(1 / C a )+(2 / C b )} -1 / 2 If Newton's generalized binomial theorem is applied, the expression can be transformed as shown in equation (22) below. Furthermore, the transformations in the second and third rows of equation (22) below take into account (1 / C). a )>(1 / C b Approximate to ).

[0167] [Formula 13]

[0168]

[0169] Based on equations (21) and (22), the following relation (23) is obtained.

[0170] [Formula 14]

[0171]

[0172] If we rearrange equation (20) using the derived equation (23), it becomes equation (24) below. Furthermore, when applying equation (23), C... δ Also included in C b In addition, the first and second rows of the following equation (24) use an approximation based on equation (2).

[0173] [Formula 15]

[0174]

[0175]

[0176] Then, as Figure 12 As shown, the signal output from the output electrode 412 is multiplied by the reference signal v through the multiplier 44. ref Multiply. At this time, the voltage v″ of the signal output from multiplier 44 a1-m2-b1 Equation (24) can be used, along with the representation of the reference signal v. ref The voltage is given by equation (5) and rearranged as shown in equation (26) below.

[0177] [Formula 16]

[0178]

[0179] Furthermore, the voltage v of the specific output signal from the low-pass filter 45 a1-m2-b1 Only the DC component is retained in equation (26), and by returning V1, as defined in equation (25), to equation (26), it can be expressed as in equation (27). The v in equation (27) below... a1-m2-b1 It is only the output switching device SW of the multiple output switching devices 42 b1 Set to the voltage of a specific output signal when the device is in the ON state.

[0180] [Formula 17]

[0181]

[0182] Next, a specific input signal is input to the first insulated wire 82a, and an auxiliary signal V- is input to the second insulated wire 82b. The calculation is performed on the output switching device SW among the multiple output switching devices 42. b2 The voltage v of a specific output signal when set to the ON state. a1-m2-b2 The voltage v of the specific output signal, as expressed by equation (27), is calculated. a1-m2-b1 Under the same logic, the voltage v of a specific output signal is obtained as shown in equation (28) below. a1-m2-b2 .

[0183] [Formula 18]

[0184]

[0185] Next, a specific input signal is input to the first insulated wire 82a, and an auxiliary signal V- is input to the second insulated wire 82b. The calculation is performed on the output switching device SW among the multiple output switching devices 42. b3 The voltage v of a specific output signal when set to the ON state. a1-m2-b3 The equivalent circuit at this time is as follows: Figure 13 As shown, but for the sake of simplicity in calculation, in the case of 3 coupling capacitors C α C β C γ Perform a Δ-Y transformation on the connection points between them, transforming them into Figure 14 The equivalent circuit is shown. Let the coupling capacitor after the Δ-Y conversion be C. x C y C z .according to Figure 14 The equivalent circuit, when using AC theory, is the voltage v′ of the signal output from output electrode 412. a1-m2-b3 As shown in equation (29) below.

[0186] [Formula 19]

[0187]

[0188] Here, if we use the relationship in equation (23) to transform equation (29), and make C x C y And C z Returning to the point where C was used α C β And C γ The formula can be approximated as shown in the following formula (30).

[0189] [Formula 20]

[0190]

[0191] Here, the following inequality can be obtained according to equation (2).

[0192] [Formula 21]

[0193]

[0194]

[0195]

[0196] If this inequality is used, then equation (30) can be approximated as in equation (31) below.

[0197] [Formula 22]

[0198]

[0199]

[0200] Then, as Figure 14 As shown, the signal output from the output electrode 412 is multiplied by the reference signal v through the multiplier 44. ref Multiply. At this time, the voltage v″ of the signal output from multiplier 44 a1-m2-b3 Equation (31) can be used, along with the representation of the reference signal v. ref The voltage equation (5) is rearranged as shown in equation (33) below.

[0201] [Formula 23]

[0202]

[0203] Furthermore, the voltage v of the specific output signal from the low-pass filter 45 a1-m2-b3 Only the DC component is retained in equation (33), and by returning V3, as defined by equation (32), to equation (33), it can be expressed as in equation (34) below. The voltage v in equation (34) below... a1-m2-b3 It is only the output switching device SW of the multiple output switching devices 42 b3 Set to the voltage of a specific output signal when the device is in the ON state.

[0204] [Formula 24]

[0205]

[0206] Based on the above, the voltage v of a specific output signal can be calculated as shown in equations (27), (28), and (34). a1-m2-b1 v a1-m2-b2 and v a1-m2-b3 .

[0207] Here, in Figure 11 In the example circuit shown, assuming the coupling capacitor C p1 C p2 C q1 C q2 C q3 When all are equal, according to equations (27), (28), and (34), the voltage v a1-m2-b1 Specific voltage v a1-m2-b2 v a1-m2-b3 Large. Therefore, in the coupling capacitance C p1 C p2 C q1 C q2C q3 Without deviation, only the voltage v of a specific output signal a1-m2-b1 v a1-m2-b2 and v a1-m2-b3 By comparison, the second exposed end 822 that outputs a specific output signal with the maximum voltage can be identified as the second exposed end 822 of the insulated wire 82 that inputs a specific input signal.

[0208] However, for example, if in the coupling capacitor C q1 C q2 C q3 If a deviation occurs between them, it may become v. a1-m2-b1 <v a1-m2-b2 、or v a1-m2-b1 <v a1-m2-b3 This could lead to false detections in determining the correspondence between multiple first exposed ends 821 and multiple second exposed ends 822. That is, according to equation (27), v a1-m2-b1 With coupling capacitor C q1 It has a positive correlation. According to equation (28), v a1-m2-b2 With coupling capacitor C q2 It has a positive correlation. According to equation (34), v a1-m2-b3 With coupling capacitor C q3 It has a positive correlation, therefore in the coupling capacitor C q1 Compared to the coupling capacitor C q2 And C q3 In each case where v decreases, a1-m2-b1 <v a1-m2-b2 、or v a1-m2-b1 <v a1-m2-b3 The relationship is valid, but false detection may occur. For example, if the diameter of the second exposed end 822 of the first insulated wire 82a of the input-side specific object is formed to be smaller than the diameter of the second exposed end 822 of the other insulated wires 82 due to tolerance, or if the relative position of the second exposed end 822 of the first insulated wire 82a of the input-side specific object to the output electrode 412 deviates from the expected position due to manufacturing error, then the coupling capacitor C... q1 Possibly more than the coupling capacitance C q2 and C q3 Each of the small ones in it.

[0209] Therefore, the voltage value of a specific output signal is corrected to a value that is less susceptible to the influence of deviations in the coupling capacitance between the multiple opposing second exposed ends 822 and the multiple output electrodes 412. The corrected voltage v a1-m2-b1 The correction voltage value is set to vc a1-m2-b1 The voltage v was corrected. a1-m2-b2 The correction voltage value is set to vc a1-m2-b2The voltage v was corrected. a1-m2-b3 The correction voltage value is set to vc a1-m2-b3 At that time, the correction voltage value vc a1-m2-b1 VC a1-m2-b2 VC a1-m2-b3 It is represented by the following formulas (35) to (37).

[0210] [Formula 25]

[0211]

[0212]

[0213]

[0214] As shown in equations (35) to (37), the correction voltage value vc is the voltage v of the specific output signal output from the second exposed end 822, which is the output side specific object, multiplied by the coupling capacitance C between the second exposed end 822, which is the output side specific object, and the output electrode 412. qx The value is obtained by a correction coefficient with negative correlation. Therefore, it is possible to calculate the reduced coupling capacitance C between the second exposed end 822 (which is the specific object on the output side) and the output electrode 412. qx The correction voltage value is affected by the effect.

[0215] Additionally, the correction factor is related to the coupling capacitance C between the second exposed end 822 and the output electrode 412 for outputting a specific output signal. qx The product of a term with negative correlation (i.e., the numerator of the correction coefficients shown in equations (35) to (37)) and a term with positive correlation (i.e., the term after removing the numerator from the correction coefficients shown in equations (35) to (37)) with respect to a predetermined reference value of the coupling capacitance between the opposing second exposed end 822 and the output electrode 412. In this embodiment, the term with positive correlation to the reference coupling capacitance relative to the predetermined reference value of the coupling capacitance between the opposing second exposed end 822 and the output electrode 412 is the term with positive correlation to the coupling capacitance C between the second exposed end 822 and the output electrode 412 that outputs a specific output signal. qx Coupling capacitance C of negatively correlated terms qx The term is changed to a reference coupling capacitance. The reference coupling capacitance is estimated as the value of the coupling capacitance between the plurality of mutually opposing second exposed ends 822 and the plurality of output electrodes 412, which in this embodiment is C. qrTherefore, it is possible to prevent the correction coefficient from becoming a value significantly far from 1, and to prevent the correction voltage value from deviating significantly from the voltage value of the specific output signal on which the calculation is based. Furthermore, the reference coupling capacitor is not limited to this; for example, it can also be set as the coupling capacitor between any one of the second exposed ends 822 and the output electrode 412 opposite to that second exposed end.

[0216] The correction voltage value vc is expressed by equations (35) to (37). a1-m2-b1 VC a1-m2-b2 VC a1-m2-b3 The value can be obtained by substituting the theoretical values ​​estimated by estimation unit 612, expressed by equations (14) to (19), into the coupling capacitance C expressed by equations (35) to (37). p1 C p2 C q1 C q3 C qr The second exposed end 822, which outputs a specific output signal that forms the basis for calculating the largest correction voltage value vc among the obtained correction voltage values, is determined as the second exposed end 822 corresponding to the first exposed end 821 that received the specific input signal. Thus, even if there is a deviation in the coupling capacitance between the multiple second exposed ends 822 and the multiple output electrodes 412, the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 can be determined based on the correction voltage value that reduces the influence of the coupling capacitance between the multiple second exposed ends 822 and the multiple output electrodes 412, thereby determining the correspondence with high precision. Furthermore, the determination of the second exposed end 822 corresponding to the first exposed end 821 of the insulated wire 82 other than the first insulated wire 82a can also be based on the same theory as described above.

[0217] (Coupling Capacitor Estimation Method)

[0218] Next, an example of a method for estimating the coupling capacitance between the plurality of first exposed ends 821 and the plurality of input electrodes 242, and the coupling capacitance between the plurality of second exposed ends 822 and the plurality of output electrodes 412 will be described. Figure 15 This is a flowchart for estimating the coupling capacitance. Hereafter, the notation n will denote the total number of insulated wires 82 in the multi-core cable 8. Furthermore, the first exposed ends 821 of all insulated wires 82 will be sequentially numbered from 1 to n, and similarly, the second exposed ends 822 of the insulated wires 82 will be sequentially numbered from 1 to n. The main input switch device 23 electrically connected to the input electrode 242 opposite to any x-th first exposed end 821 is called the main input switch device SW. axThe output switching device 42 that is electrically connected to the output electrode 412 opposite to the second exposed end 822 of any x-th insulated wire 82 is called the output switching device SW. bx .

[0219] When estimating the coupling capacitor, the total number n of the input insulated wires 82 is stored in the storage unit 62. Next, all auxiliary switching devices 33 are set to the off state, and in a predetermined multiple combination of input electrodes 242 that input the measurement input signal and output electrodes 412 that output the measurement output signal, the following steps are performed: when the measurement input signal is input from the input electrode 242 to the first exposed end 821 via capacitive coupling, the voltage value of the measurement output signal output from the second exposed end 822 via the output electrode 412 via capacitive coupling is measured (steps S101 to S107). The predetermined multiple combinations are combinations of all the voltage values ​​of the measurement output signals represented by the theoretical formulas (e.g., formulas (14) to (19)) that can obtain the coupling capacitors between the multiple first exposed ends 821 and the multiple input electrodes 242, and between the multiple second exposed ends 822 and the multiple output electrodes 412. Steps S101 to S107 are performed by the first measurement unit 611.

[0220] In step S101, the voltage v is measured by the first measuring unit 611. a1-m0-b1 Voltage v a1-m0-b1 This enables the main input switching device SW a1 and output switching device SW b1 The voltage of the output signal is measured when the device is in the ON state, and all other main input switches 23, other output switches 42, and all auxiliary switches 33 are in the OFF state. Voltage v a1-m0-b1 The measurement results are stored in storage unit 62.

[0221] Next, in step S102, the voltage v is measured by the first measuring unit 611. a1，a2-m0-b1 Voltage v a1，a2-m0-b1 This enables the main input switching device SW a1 SW a2 Both parties and the output switching device SW b1 The voltage of the output signal is measured when the device is in the ON state, and all other main input switches 23, other output switches 42, and all auxiliary switches 33 are in the OFF state. Voltage v a1，a2-m0-b1 The measurement results are stored in storage unit 62.

[0222] Next, the voltage v is measured and stored when the variable i is set to 2 to n. a1-m0-bi And measure and store voltage v ai-m0-b1(Steps S103~S107). Voltage v a1-m0-bi This enables the main input switching device SW a1 and output switching device SW bi The voltage of the output signal is measured when the device is in the ON state, and all other main input switches 23, other output switches 42, and all auxiliary switches 33 are in the OFF state. Voltage v ai-m0-b1 This enables the main input switching device SW ai and output switching device SW b1 The voltage of the output signal is measured when the device is in the ON state and other main input switching device 23, other output switching device 42 and all auxiliary switching devices 33 are in the OFF state.

[0223] First, in step S103, variable i is initialized to 2. Next, in step S104, the voltage v, set to i = 2, is measured. a1-m0-bi And store it in storage unit 62. Next, in step S105, measure the voltage v set to i=2. ai-m0-b1 The data is stored in storage unit 62. Next, in step S106, it is determined whether variable i is greater than or equal to the total number n of insulated wires 82. At the current moment, variable i is 2, so in step S106, the result is "no", and the process proceeds to step S107. In step S107, variable i is incremented by 1, and the process returns to step S104. Then, the processes of steps S104 to S105 are performed until it is determined in step S106 that variable i is greater than or equal to the total number n of insulated wires 82. If it is determined that variable i is greater than or equal to the total number n, the process proceeds to the next step S108.

[0224] In step S108, the average value v is calculated. a1-m0-ave Calculation and storage of the average value v. a1-m0-ave It is the voltage v when variable i is set to 1 to n. a1-m0-bi The average value is obtained by using the voltage v stored in the storage unit 62. a1-m0-bi The value is calculated using steps S101 and S104. The calculated average value v a1-m0-ave Stored in storage section 62.

[0225] Next, in steps S109 to S114, estimated values ​​are calculated for each coupling capacitance between the plurality of first exposed ends 821 and the plurality of input electrodes 242, and for each coupling capacitance between the plurality of second exposed ends 822 and the plurality of output electrodes 412. This process is performed by the estimation unit 612. (Using the notation C...) px The coupling capacitance between any x-th first exposed end 821 and its opposite input electrode 242 is represented by the notation C. qxThis represents the coupling capacitance between any xth second exposed end 822 and its opposite output electrode 412.

[0226] First, in step S109, variable i is initialized to 1. Next, in step S110, the coupling capacitance C, set to i = 1, is calculated. qi And stored in storage section 62. Coupling capacitor C q1 According to the above formula (16), the voltage v stored in the storage unit 62 is used. a1-m0-b1 (i.e., the notation in equation (16)) α ), v a2-m0-b1 (i.e., the notation in equation (16)) β ), v a1，a2-m0-b1 (i.e., the notation in equation (16)) γ Next, in step S111, setting i=1, the coupling capacitance C is calculated. pi And stored in storage section 62. Coupling capacitor C p1 According to the above formula (14), the voltage v stored in the storage unit 62 is used. a1-m0-b1 (i.e., the notation in equation (16)) α ), v a2-m0-b1 (i.e., the notation in equation (16)) β ), v a1，a2-m0-b1 (i.e., the notation in equation (16)) γ ) to calculate.

[0227] Next, in step S112, it is determined whether variable i is greater than or equal to the total number n of insulated wires 82. At the current moment, variable i is 2, so it is determined as "no" in step S112, and the process proceeds to step S113. In step S113, variable i at the current moment is incremented by 1, and the process returns to step S110. Then, according to the above equations (14) to (19), various voltages v stored in the storage unit 62 are used. ax-m0-by (x and y are arbitrary values ​​from 1 to n) Calculate the coupling capacitance C for each variable i in turn. qi C pi In step S112, if it is determined that variable i is greater than or equal to the total number n of insulated wires 82, proceed to the next step S114.

[0228] In step S114, the coupling capacitance C is calculated according to the above equations (13) and (19). qr Coupling capacitor C qr These are the values ​​used in the correspondence determination method described later, and therefore are calculated here.

[0229] As described above, it is possible to estimate the coupling capacitance between the plurality of first exposed ends 821 and the plurality of input electrodes 242, and the coupling capacitance between the plurality of second exposed ends 822 and the plurality of output electrodes 412.

[0230] (Method for determining correspondence)

[0231] Next, an example of a method for determining the correspondence between a plurality of first exposed ends 821 and a plurality of second exposed ends 822 will be described. Figure 16 This is a flowchart illustrating a method for determining the correspondence between a plurality of first exposed ends 821 and a plurality of second exposed ends 822. Figure 17 This is a flowchart illustrating a method for determining the correspondence between a plurality of first exposed ends 821 and a plurality of second exposed ends 822. Figure 16 A diagram of the subsequent processes shown in the diagram.

[0232] The correspondence determination method is a method for determining the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822, and executes steps S201 to S226. In the correspondence determination method, firstly, in step S201, each coupling capacitance between the plurality of first exposed ends 821 and the plurality of input electrodes 242, and each coupling capacitance between the plurality of second exposed ends 822 and the plurality of output electrodes 412 are estimated. Step S201 is the aforementioned coupling capacitance estimation method (…). Figure 15 (Steps S101 to S114).

[0233] Then, in steps S202 to S204, variables i, j, and k are initialized to 1 respectively (steps S202 to S204). Next, the voltage v under this condition is measured. aj-mM(i)-bk (Step S205). Voltage v aj-mM(i)-bk This enables the main input switching device SW aj Auxiliary switchgear SW mM(i) and output switching device SW bk The voltage of a specific output signal when the device is in the ON state, and other main input switching devices 23, other auxiliary switching devices 33, and other output switching devices 42 are in the OFF state. Main input switching device SW aj It is the main input switch device 23 electrically connected to the input electrode 242 opposite to the j-th first exposed end 821. Auxiliary switch device SW mM(i)It is an auxiliary switching device 33 electrically connected to the input electrode 242 opposite to any M(i)th first exposed end 821. The function M(i) is a value from 1 to the total number n of insulated wires 82, and its value varies according to the variable i. Furthermore, the variable i is a value from 1 to N, and the values ​​of functions M(1) to M(N) are different from each other. Output switching device SW bk It is an output switch device 42 electrically connected to the output electrode 412 opposite to the second exposed end 822 of the k-th insulated wire 82. Here, the notation N represents the upper limit of the number of repetitions of the re-inspection process described later, and is in the relationship of N≤n.

[0234] In the initial step S205, the second measuring unit 613 is used to measure the voltage v when i, j, and k are all 1. aj-mM(i)-bk That is, voltage v a1-mM(1)-b1 The voltage v measured in the previous step S205 is then stored in the storage unit 62. Next, in step S206, the voltage v is used... aj-mM(i)-bk The C estimated in step S201 pj C pM(i) C qr C qk as well as Figure 16 The mathematical formula described in step S206 is used to calculate the correction voltage value vc. aj-mM(i)-bk The data is stored in storage unit 62. Next, in step S207, it is determined whether the variable k is greater than or equal to the total number n of insulated wires 82. At the current moment, the variable k is 1, so in step S207, it is determined to be "no", and the process proceeds to step S208. In step S208, the variable k at the current moment is incremented by 1, and the process returns to step S205. Then, the processes of steps S205 to S206 are performed until it is determined in step S207 that the variable k is greater than or equal to the total number n of insulated wires 82.

[0235] In step S207, if it is determined that variable k is greater than or equal to the total number n, then proceed to the next step S209. When it is determined that variable k is greater than or equal to the total number n, the voltage v has been obtained. a1-mM(1)-b1 ~Voltage v a1-mM(1)-bn and their respective correction voltage values ​​vc a1-mM(1)-b1 ~vc a1-mM(1)-bn The state of the voltage v. a1-mM(1)-b1 ~Voltage v a1-mM(1)-bn It is the voltage of the specific output signal output from all the second exposed ends, respectively, under the condition that a specific input signal is input to the first first exposed end and an auxiliary signal V- is input to the M(1)th first exposed end. Then, the correction voltage value vc is... a1-mM(1)-b1 ~vc a1-mM(1)-bnThe correction voltage value is calculated based on each of the voltages of the specific output signal measured as described above.

[0236] Steps S209 to S210 are executed by the corresponding determination unit 614. In step S209, the correction voltage value vc stored in the storage unit 62 is... a1-mM(1)-bk The value of variable k when the value of (variable k is 1 to n) becomes the maximum is set as k′. That is, the value k′ is the number of the second exposed end 822 corresponding to the first exposed end 821.

[0237] Next, in step S210, the function d(j) is used, denoted as d(j) = k′. Equation d(j) = k′ indicates that the second exposed end 822 corresponding to the j-th first exposed end 821 is the k′-th second exposed end 822 on the right. At the current moment, variable j is 1, therefore, in the initial step S210, d(1) = k′ is determined. That is, in the initial step S210, the second exposed end 822 corresponding to the first first exposed end 811 is determined. Furthermore, the information d(1) = k′ is stored in the storage unit 62.

[0238] Next, in step S211, it is determined whether variable j is greater than or equal to the total number n of insulated wires 82. At the current moment, variable j is 1, so the determination in step S211 is "no", and the process proceeds to step S212. In step S212, variable j at the current moment is incremented by 1, and the process returns to step S204. Then, the steps S204 to S210 are performed until it is determined in step S211 that variable j is greater than or equal to the total number n of insulated wires 82.

[0239] If the determination is that variable j is greater than or equal to the total number n, then proceed to... Figure 17 The next step S213 is shown. Furthermore, when it is determined that the variable j is greater than or equal to the total number n, the states of the functions d(1) to d(n) are determined respectively, that is, the states of the second exposed ends 822 corresponding to all the first exposed ends 821 are determined respectively.

[0240] Step S213 is executed by the false detection determination unit 615. In step S213, it is determined whether the functions d(1) to d(n) stored in the storage unit 62 are repeated. If the functions d(1) to d(n) are not repeated, it is determined that the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 has been correctly obtained, and the correspondence determination process ends. On the other hand, if the functions d(1) to d(n) are repeated, the second exposed ends 822 corresponding to the determined multiple first exposed ends 821 are repeated, resulting in a false detection. Therefore, in steps S214 to S227, the correspondence between the multiple first exposed ends 821 that are repeated with the corresponding second exposed ends 822 is re-determined.

[0241] First, in step S214, the variable i (which is 1 at the current moment) is incremented by 1. The processing in step S214 is used in step S219, described later, to measure the voltage v of the specific output signal. aD(j)-mM(i)-bk The preparation process. That is, the process of step S214 is to set the number M(i) of the first exposed end 821 of the auxiliary signal V- input in step S219 (described later) to a number different from the number of the first exposed end 821 of the auxiliary signal V- input previously (i.e., the value of function M(1)).

[0242] Next, in step S215, it is determined whether the value i-1 is below the upper limit of re-detection count N. The value i-1 in step S215 represents the nth time the re-detection process (i.e., the processes in steps S216 to S226) has been performed after step S215. Furthermore, the upper limit of re-detection count N represents the maximum number of times the re-detection process can be repeated, and is preset. A higher upper limit of re-detection count N reduces the likelihood of false detections, but increases the system load. From the viewpoint of reducing the likelihood of false detections and suppressing the increase in system load, the upper limit of re-detection count N can be set to 10 or more and 100 or less, more specifically, 10 or more and 50 or less. In step S215, if the value i-1 is below the upper limit of re-detection count N, the re-detection process (i.e., the processes in steps S216 to S226) continues. On the other hand, if the value i-1 exceeds the upper limit of re-detection count N, the determination of the correspondence ends.

[0243] In the re-inspection process (i.e., steps S216 to S226), firstly, in step S216, the repetition number of d(1) to d(n) is set to w. That is, as an example, when d(1) and d(6) are both 2, and d(3) and d(8) are both 7, the repetition number w is set to 4. In addition, the first exposed ends 821 that are determined to be repeated by the corresponding second exposed end 822, i.e., the multiple repeated first exposed ends, are sequentially numbered as D(1) to d(w).

[0244] Next, in step S217, variable j is initialized to 1, and in step S218, variable k is initialized to 1. Then, in step S219, voltage v is measured by the second measuring unit 613. aD(1)-mM(2)-b1 Voltage v aD(1)-mM(2)-b1This refers to the voltage of a specific output signal when the main input switch device 23, electrically connected to the input electrode 242 opposite to the D(1)th first exposed end 821, the auxiliary switch device 33, electrically connected to the input electrode 242 opposite to the M(2)th first exposed end 821, and the output switch device 42, electrically connected to the output electrode 412 opposite to the first second exposed end, are in the ON state, while the other main input switch device 23, auxiliary switch device 33, and output switch device 42 are in the OFF state. Voltage v aD(1)-mM(2)-b1 The measurement results are stored in storage unit 62.

[0245] Next, in step S220, the calculation is performed using... Figure 17 The mathematical formula recorded in step S220 is related to the voltage v measured in the previous step S219. aD(j)-mM(i)-bk (Voltage v at the current moment) aD(1)-mM(2)-b1 The corrected voltage value vc after correction aD(j)-mM(i)-bk (Voltage vc at the current moment) aD(1)-mM(2)-b1 The variable k is stored in storage unit 62. Next, in step S221, it is determined whether the variable k is greater than or equal to the total number n of insulated wires 82. At the current moment, the variable k is 1, therefore, in step S221, the determination is "no", and the process proceeds to step S222. In step S222, the variable k at the current moment is incremented by 1, and the process returns to step S219. Then, the processes of steps S219 to S220 are performed until it is determined in step S221 that the variable k is greater than or equal to the total number n of insulated wires 82.

[0246] In step S221, if it is determined that variable k is greater than or equal to the total number n, then proceed to the next step S223. When it is determined that variable k is greater than or equal to the total number n, the voltage v has been obtained. aD(1)-mM(2)-b1 ~Voltage v aD(1)-mM(2)-bn and their respective correction voltage values ​​vc aD(1)-mM(2)-b1 ~vc aD(1)-mM(2)-bn The state of the voltage v. aD(1)-mM(2)-b1 ~Voltage v aD(1)-mM(2)-bn This is a measured value of the voltage of a specific output signal output from each of the second exposed terminals, under the condition that a specific input signal is input to the D(1)th first exposed terminal and an auxiliary signal V- is input to the M(2)th first exposed terminal. Furthermore, the correction voltage value vc... aD(1)-mM(2)-b1 ~vc aD(1)-mM(2)-bn The correction voltage value is calculated based on each of the voltages of the specific output signal measured as described above.

[0247] Steps S223 to S224 are executed by the corresponding determination unit 614. In step S223, the correction voltage value vc stored in the storage unit 62 is... aD(1)-mM(2)-bkThe value of variable k when the value of (variable k is 1 to n) becomes the maximum is set as k′. That is, the value k′ is the number of the second exposed end 822 corresponding to the D (1)th first exposed end 821.

[0248] Next, in step S224, the function d(D(j)) is used, denoted as d(D(j)) = k′. The expression d(D(j)) = k′ indicates that the second exposed end 822 corresponding to the D(j)th first exposed end 821 is the k′th second exposed end 822 on the right. In the initial step S224, the second exposed end 822 corresponding to the D(1)th first exposed end 821 is determined. Furthermore, the information d(D(1)) = k′ is stored in the storage unit 62.

[0249] Next, in step S225, it is determined whether variable j is greater than or equal to the total number w of repeated first exposed ends. At the current moment, variable j is 1, so in step S225, the determination is "no", and the process proceeds to step S226. In step S226, variable j at the current moment is incremented by 1, and the process returns to step S218. Then, the steps S218 to S224 are performed until it is determined in step S225 that variable j is greater than or equal to the total number w of repeated first exposed ends.

[0250] If it is determined that the variable j is greater than or equal to the total number w of the repeated first exposed ends, then proceed to step S227. When it is determined that the variable j is greater than or equal to the total number w of the repeated first exposed ends, the states of functions d(D(1)) to d(D(w)) are determined respectively, that is, the states of the second exposed ends 822 corresponding to all the repeated first exposed ends are determined respectively.

[0251] In step S227, it is determined whether the values ​​of functions d(D(1)) to d(D(w)) are repeated in the updated d(1) to d(n). If the functions d(1) to d(n) are not repeated, it is determined that the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 has been correctly obtained, and the correspondence determination process ends. On the other hand, if the functions d(1) to d(n) are repeated, since the second exposed ends 822 corresponding to the multiple first exposed ends 821 are repeated, the state of false detection is still present. Therefore, in steps S214 to S227, the correspondence between the multiple first exposed ends 821 that are repeated with the corresponding second exposed ends 822 is re-determined. This process is repeated until the functions d(1) to d(n) are no longer repeated (i.e., until it is determined to be "no" in step S227), or until the value i-1 exceeds the upper limit of the number of re-detections N (i.e., until it is determined to be "no" in step S215).

[0252] Through the above processing, the correspondence between multiple first exposed ends 821 and multiple second exposed ends 822 can be determined with high precision.

[0253] (Effect Verification Simulation)

[0254] Next, the simulation results will be explained regarding the accuracy of determining the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822 in this method.

[0255] Here, simulations were performed to calculate the accuracy of the correspondence determination for three cases: a reference example, a comparative example, and an embodiment. In the reference example and the comparative example, the voltage values ​​of the specific output signals output from each of the second exposed ends 822 were compared without correction. The second exposed end 822 that output the specific output signal with the maximum voltage value was determined to be the second exposed end 822 corresponding to the first exposed end 821 of the specific object on the input side. For other processing, the same processing as in this method was performed. In the embodiment, the voltage values ​​of the specific output signals were corrected as in this method, and the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822 was determined.

[0256] In both the comparative example and the embodiment, it is assumed that there is a deviation in the coupling capacitance between the multiple insulated wires 82 and their respective opposite electrodes. In the reference example, it is assumed that the coupling capacitance between the multiple insulated wires 82 and their respective opposite electrodes is constant (without deviation). Moreover, the values ​​of various parameters used in the simulation are those described in Table 1 above.

[0257] Then, firstly, the SN ratio is calculated for each of the reference example, comparative example, and embodiment. In the reference example and comparative example, the SN ratio is calculated when a specific input signal is input to the first insulated wire 82a and a reference signal v is input to the second insulated wire 82b. ref The voltage of the specific output signal output from the second exposed end 822 of the first insulated wire 82a is divided by the voltage of the specific output signal output from the second exposed end 822 of the third insulated wire 82c. Furthermore, in this embodiment, the SN ratio is obtained by inputting a specific input signal to the first insulated wire 82a and a reference signal v to the second insulated wire 82b. ref The corrected voltage value is calculated by dividing the voltage of a specific output signal output from the second exposed end 822 of the first insulated wire 82a by the corrected voltage value calculated by dividing the voltage of a specific output signal output from the second exposed end 822 of the third insulated wire 82c. It can be said that the larger the SN ratio, the smaller the noise impact when determining the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822; a SN ratio greater than 1 is particularly preferred.

[0258] In the reference example, the SN ratio is 15.2; in the comparative example, the SN ratio is 0.7; and in the embodiment, the SN ratio is 14.9. That is, in the embodiment where the correspondence between the plurality of first exposed ends 821 and the plurality of second exposed ends 822 is determined based on the correction voltage value, the SN ratio is significantly greater than 1, achieving a result equivalent to that of the reference example under ideal conditions.

[0259] Furthermore, in the simulation, the correspondence between multiple first exposed ends 821 and multiple second exposed ends 822 was determined for various cases in the reference example, comparative example, and embodiment. The result was that false detection occurred in the comparative example, but no false detection occurred in the reference example and embodiment. Therefore, it can be seen that if the correspondence between multiple first exposed ends 821 and multiple second exposed ends 822 is determined based on the correction voltage value, the accuracy of the correspondence determination can be easily improved.

[0260] (The function and effects of the first embodiment)

[0261] In this method, based on the measured voltage values ​​of multiple measured output signals, the coupling capacitances between the multiple opposing input electrodes 242 and the multiple first exposed ends 821, and the coupling capacitances between the multiple opposing output electrodes 412 and the multiple second exposed ends 822 are estimated. Therefore, the coupling capacitances between the multiple opposing input electrodes 242 and the multiple first exposed ends 821, and the coupling capacitances between the multiple opposing output electrodes 412 and the multiple second exposed ends 822, can be easily determined.

[0262] Furthermore, in this method, using the estimated value of the coupling capacitance between the second exposed end 822, which is an output-side specific object, and the output electrode 412, which is estimated by the coupling capacitance estimation method, a correction voltage value is calculated by multiplying the voltage value of the specific output signal output from the second exposed end 822, which is an output-side specific object, by a correction coefficient that has a negative correlation with the coupling capacitance between the second exposed end 822, which is an output-side specific object, and the output electrode 412. Then, based on the calculated correction voltage values, the second exposed end 822 corresponding to the first exposed end 821, which is an input-side specific object, is determined. Therefore, even if there is a deviation in the coupling capacitance between the multiple second exposed ends 822 and the multiple output electrodes 412, the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 is determined based on the correction voltage value that reduces the influence of the coupling capacitance between the multiple second exposed ends 822 and the multiple output electrodes 412, thereby enabling the determination of the correspondence with high accuracy.

[0263] Furthermore, the correction coefficient is the product of a term negatively correlated with the coupling capacitance between the second exposed end 822 and the output electrode 412 of a specific output-side object, and a term positively correlated with a reference coupling capacitance representing a predetermined reference value of the coupling capacitance between the opposing second exposed ends 822 and the output electrode 412. Therefore, by using the term negatively correlated with the coupling capacitance between the second exposed end 822 and the output electrode 412 that outputs a specific output signal, the influence of the coupling capacitance between multiple second exposed ends 822 and multiple output electrodes 412 can be reduced in the correction voltage value. Conversely, by using the term positively correlated with the reference coupling capacitance representing a predetermined reference value of the coupling capacitance between the opposing second exposed ends 822 and the output electrode 412, large fluctuations in the correction voltage value from the voltage of the specific output signal before correction can be easily prevented.

[0264] As described above, according to this method, a coupling capacitance estimation method for estimating the coupling capacitances between a plurality of mutually opposed input electrodes and a plurality of first exposed ends, and between a plurality of mutually opposed output electrodes and a plurality of second exposed ends, a method for determining the correspondence between the ends of a multi-core cable, a coupling capacitance estimation device, and a method for manufacturing a multi-core cable assembly can be provided.

[0265] [Second Implementation]

[0266] This method changes the correction coefficient from the first embodiment, while remaining the same as the first embodiment. In this method, the correction coefficient is the product of the following two terms: a term that is positively correlated with the average value of the voltage values ​​of the measurement output signals output from the plurality of second exposed ends 822 when a measurement input signal is input to the first exposed end 821, which is a specific object on the input side, via the first measurement unit 611; and a term that is negatively correlated with the voltage value of the measurement output signal output from the second exposed end 822, which is a specific object on the output side, when a measurement input signal is input to the first exposed end 821, which is a specific object on the input side. That is, the correction voltage value vc shown in equations (35) to (37) a1-m2-b1 VC a1-m2-b2 VC a1-m2-b3 In this method, it is represented by the following equations (38) to (40).

[0267] [Formula 26]

[0268]

[0269]

[0270]

[0271] Details will be described later. The correction coefficients in equations (38) to (40) above are similar to those in the first embodiment, and are negatively correlated with the coupling capacitance between the second exposed end 822, which is an output-side specific object, and the output electrode 412. Therefore, the correction voltage values ​​expressed by equations (38) to (40) are values ​​that are difficult to be affected by the coupling capacitance between the second exposed end 822, which is an output-side specific object, and the output electrode 412. This will be explained below.

[0272] If equations (8), (9), (11), and (12) are summarized, they can be summarized into equation (41) below. Furthermore, in the following equation, s and t are any one of 1 to 3.

[0273] [Formula 27]

[0274]

[0275] Here, using equation (41), v is set as in equation (42) below. as-m0-ave .

[0276] [Formula 28]

[0277]

[0278] Based on the above, equations (38) to (40) can be transformed as shown in equations (43) to (45) below.

[0279] [Formula 29]

[0280]

[0281]

[0282]

[0283] According to equation (27), the voltage v represented on the right side of equation (43) is... a1-m2-b1 With C q1 It has a positive correlation with the voltage v a1-m2-b1 The correction factor multiplied with C q1 It has a negative correlation. Therefore, the correction voltage value vc expressed by equation (43) a1-m2-b1 Able to reduce coupling capacitance C q1 The effect of this. Similarly, the correction voltage value vc expressed by equation (44) a1-m2-b2 Able to reduce coupling capacitance C q2 The effect of the correction voltage value vc, expressed by equation (45), is as follows. a1-m2-b3 Able to reduce coupling capacitance C q3Therefore, even if there is a deviation in the coupling capacitance between the multiple second exposed ends 822 and the multiple output electrodes 412, the correspondence between the multiple first exposed ends 821 and the multiple second exposed ends 822 can be determined based on the correction voltage value that reduces the influence of the coupling capacitance between the multiple second exposed ends 822 and the multiple output electrodes 412, thereby enabling the determination of the correspondence with high accuracy.

[0284] Everything else is the same as in the first embodiment.

[0285] Furthermore, in the reference numerals used in the second embodiment and thereafter, reference numerals identical to those used in the previously described embodiments denote the same structural elements as those in the previously described embodiments, unless otherwise specified.

[0286] (Function and Effects of the Second Embodiment)

[0287] This method also has the same effects as the first embodiment.

[0288] (Summary of Implementation Methods)

[0289] Next, the technical ideas grasped from the embodiments described above will be described using reference numerals and the like in the embodiments. However, the reference numerals and the like in the following description do not limit the structural elements of the claimed technical solution to the components specifically shown in the embodiments.

[0290] [1] A method for estimating coupling capacitance, wherein multiple input electrodes (242) are respectively positioned opposite to each first exposed end (821) of multiple insulated wires (82) exposed at one end of a multi-core cable (8), and multiple output electrodes (412) are respectively positioned opposite to each second exposed end (822) of the multiple insulated wires (82) exposed at the other end of the multi-core cable (8), and the following steps are performed in a predetermined multiple combinations of input electrodes (242) for inputting the measurement input signal and output electrodes (412) for outputting the measurement output signal: measuring the coupling capacitance of the multi-core cable (8). When a measurement input signal is input from the input electrode (242) to the first exposed end (821) via capacitive coupling, the voltage value of the measurement output signal output from the second exposed end (822) through the output electrode (412) via capacitive coupling is used to estimate the voltage values ​​of the multiple measurement output signals. Based on these voltage values, the coupling capacitances between the multiple opposing input electrodes (242) and the multiple first exposed ends (821), and the coupling capacitances between the multiple opposing output electrodes (412) and the multiple second exposed ends (822) are estimated.

[0291] [2A] A method for determining the correspondence of ends of a multi-core cable, which uses the coupling capacitance estimation method described in [1] above to determine the correspondence between the plurality of first exposed ends (821) and the plurality of second exposed ends (822), wherein a specific input signal is input from the input electrode (242) to the first exposed end (821) that becomes a specific object on the input side among the plurality of first exposed ends (821) through capacitive coupling, and a first exposed end (821) other than the first exposed end (821) that becomes a specific object on the input side among the plurality of first exposed ends (821) through capacitive coupling. An auxiliary signal opposite in phase to the specific input signal is input to the end (821). The voltage values ​​of specific output signals output from the plurality of second exposed ends (822) through the output electrode (412) are measured respectively through capacitive coupling. The voltage values ​​of each specific output signal measured at the plurality of second exposed ends (822) are combined with a correction coefficient calculated using the estimated value of the coupling capacitor estimated by the coupling capacitor estimation method. A correction voltage value is calculated thereby. Based on the calculated correction voltage value, the second exposed end (822) corresponding to the first exposed end (821) of the input-side specific object is determined.

[0292] [2B] A method for determining the correspondence of ends of a multi-core cable, using the coupling capacitance estimation method described in [1] above, determines the correspondence between the plurality of first exposed ends (821) and the plurality of second exposed ends (822), wherein, when a specific input signal is input from the input electrode (242) to the first exposed end (821) that is a specific object on the input side among the plurality of first exposed ends (821) via capacitive coupling, and an auxiliary signal with an opposite phase to the specific input signal is input from the input electrode (242) to a predetermined first exposed end (821) other than the first exposed end (821) that is a specific object on the input side among the plurality of first exposed ends (821) via capacitive coupling, the second exposed end that is a specific object on the output side among the plurality of second exposed ends (822) is measured via capacitive coupling. The process of the unit (822) outputting the voltage value of a specific output signal through the output electrode (412) continues until all the second exposed ends (822) become the output-side specific objects. Using the estimated value of the coupling capacitance between the second exposed ends (822) of the output-side specific objects and the output electrode (412) estimated by the coupling capacitance estimation method, a correction voltage value is calculated by multiplying the voltage value of the specific output signal output from the second exposed ends (822) of the output-side specific objects by a correction coefficient that has a negative correlation with the coupling capacitance between the second exposed ends (822) of the output-side specific objects and the output electrode (412). Based on the calculated correction voltage value, the second exposed end (822) corresponding to the first exposed end (821) of the input-side specific object is determined.

[0293] [3A] According to the method for determining the correspondence of the ends of the multi-core cable described in [2A] above, the correction coefficient multiplied by the voltage value of the specific output signal is the product of the following two items: an item that is related to the coupling capacitance between the second exposed end that is the output object of the specific output signal and the output electrode, and an item that is related to the reference coupling capacitance that represents a predetermined reference value of the coupling capacitance between the plurality of opposing second exposed ends and the plurality of output electrodes.

[0294] [3B] According to the method for determining the correspondence of the ends of the multi-core cable described in [2B] above, the correction coefficient is the product of the following two terms: a term that is negatively correlated with the coupling capacitance between the second exposed end (822) and the output electrode (412) of the specific object on the output side, and a term that is positively correlated with the reference coupling capacitance that is positively correlated with a predetermined reference value representing the coupling capacitance between the plurality of opposing second exposed ends (822) and the plurality of output electrodes (412).

[0295] [4A] According to the method for determining the correspondence of the ends of a multi-core cable as described in [2A] above, the correction coefficient multiplied by the voltage value of the specific output signal is the product of the following two items: a term that is correlated with the average value of the voltage values ​​of the measured output signals output from a plurality of second exposed ends respectively when the measured input signal is input to the first exposed end that is the specific object of the input side, and a term that is correlated with the voltage value of the measured output signal output from the second exposed end that is the output object of the specific output signal when the measured input signal is input to the first exposed end that is the specific object of the input side.

[0296] [4B] According to the method for determining the correspondence of the ends of the multi-core cable described in [2B] above, the correction coefficient is the product of the following two terms: a term that is positively correlated with the average voltage value of the measurement output signal output from a plurality of second exposed ends (822) when the measurement input signal is input to the first exposed end (821) which is the input side specific object, and a term that is negatively correlated with the voltage value of the measurement output signal output from the second exposed end (822) of the output side specific object when the measurement input signal is input to the first exposed end (821) which is the output side specific object.

[0297] [5] A coupling capacitance estimation device includes: a plurality of input electrodes (242) respectively disposed opposite to a first exposed end (821) of a plurality of insulated wires (82) exposed at one end of a multi-core cable (8); a plurality of output electrodes (412) respectively disposed opposite to a second exposed end (822) of the plurality of insulated wires (82) exposed at the other end of the multi-core cable (8); and a measuring unit (611) which, in a predetermined plurality of combinations of input electrodes (242) for inputting a measuring input signal and output electrodes (412) for outputting a measuring output signal, performs the following steps: measuring the capacitance of the multi-core cable (8) coupled to the first exposed end (821) of a plurality of insulated wires (82) exposed at one end of a multi-core cable (8); and a plurality of output electrodes (412) respectively disposed opposite to a second exposed end (822) of the plurality of insulated wires (82) exposed at the other end of the multi-core cable (8); and a measuring unit (611) which, in a predetermined plurality of combinations of input electrodes (242) for inputting a measuring input signal and output electrodes (412) for outputting a measuring output signal, measures the capacitance of the multi-core cable (8) coupled to the first exposed end (821) of a plurality of insulated wires (82) exposed at one end of a multi-core cable (8); and a measuring unit (611) which, in a predetermined plurality of combinations of input electrodes (242) for inputting a measuring input signal and output electrodes (412) for outputting a measuring output signal, measures the capacitance of the multi-core cable (8) coupled to the first exposed end (821) of a multi-core cable (8) for inputting a measuring input signal and output electrodes (412) for outputting a measuring output signal. When the input electrode (242) inputs the measurement input signal to the first exposed end (821), the voltage value of the measurement output signal output from the second exposed end (822) through the output electrode (412) via capacitive coupling is obtained; the estimation unit (612) estimates each coupling capacitor between the plurality of opposing input electrodes (242) and the plurality of first exposed ends (821) and each coupling capacitor between the plurality of opposing output electrodes (412) and the plurality of second exposed ends (822) based on the voltage values ​​of the plurality of measurement output signals measured in the measurement unit (611).

[0298] [6A] A method for manufacturing a multi-core cable assembly, the multi-core cable assembly comprising: a multi-core cable (8) having a plurality of insulated wires (82) and an outer sheath (81) covering the plurality of insulated wires (82); a first connected member electrically connected to a first exposed end (821) of the plurality of insulated wires (82) exposed from the outer sheath (81) at one end of the multi-core cable (8); and a second connected member electrically connected to a second exposed end of the plurality of insulated wires (82) exposed from the outer sheath (81) at the other end of the multi-core cable (8), the method for manufacturing the multi-core cable assembly comprising: a determining step of determining which second exposed end corresponds to a first exposed end (821) among the plurality of first exposed ends (821) that is a specific object;In the connection process, based on the determination results of the plurality of first exposed ends (821) and the plurality of second exposed ends in the determination process, the plurality of first exposed ends (821) are electrically connected to the first connected component, and the plurality of second exposed ends are electrically connected to the second connected component. In the determination process, the plurality of input electrodes (242) are respectively opposed to each of the plurality of first exposed ends (821), and the plurality of output electrodes (412) are respectively opposed to each of the plurality of second exposed ends. In a predetermined plurality of combinations of input electrodes (242) that input measurement input signals and output electrodes (412) that output measurement output signals, the following steps are performed: measuring the voltage value of the measurement output signal output from the second exposed end through the output electrode (412) via capacitive coupling when the measurement input signal is input from the input electrode (242) to the first exposed end (821) via capacitive coupling; based on the measured voltage values ​​of the plurality of measurement output signals, estimating the voltage values ​​of the plurality of input electrodes (242) and the plurality of first exposed ends. Each coupling capacitor between the ends (821) and each coupling capacitor between the plurality of output electrodes (412) and the plurality of second exposed ends are used to capacitively couple a specific input signal from the input electrode (242) to the first exposed end (821) that is the input-side specific object among the plurality of first exposed ends (821), and to capacitively couple an auxiliary signal opposite in phase to the specific input signal from the input electrode (242) to the first exposed ends (821) other than the first exposed ends (821) that is the input-side specific object among the plurality of first exposed ends (821). The voltage values ​​of the specific output signals output from the plurality of second exposed ends through the output electrodes (412) are measured via capacitive coupling. The voltage values ​​of the specific output signals measured at the plurality of second exposed ends are multiplied by a correction coefficient calculated using the estimated value of the coupling capacitor to calculate a correction voltage value. Based on the calculated correction voltage value, the second exposed end corresponding to the first exposed end (821) of the input-side specific object is determined.

[0299] [6B] A method for manufacturing a multi-core cable assembly, the multi-core cable assembly comprising: a multi-core cable (8) having a plurality of insulated wires (82) and an outer sheath (81) covering the plurality of insulated wires (82); a first connected component electrically connected to a first exposed end (821) of the plurality of insulated wires (82) exposed from the outer sheath (81) at one end of the multi-core cable (8); and a second connected component electrically connected to a second exposed end (822) of the plurality of insulated wires (82) exposed from the outer sheath (81) at the other end of the multi-core cable (8), the method for manufacturing the multi-core cable assembly comprising: a determining step of determining which second exposed end (822) of the plurality of first exposed ends (821) that is a specific object corresponds to;In the connection process, based on the determination results of the plurality of first exposed ends (821) and the plurality of second exposed ends (822) in the determination process, the plurality of first exposed ends (821) are electrically connected to the first connected component, and the plurality of second exposed ends (822) are electrically connected to the second connected component. In the determination process, the plurality of input electrodes (242) are respectively opposed to each of the plurality of first exposed ends (821), and the plurality of output electrodes (412) are respectively opposed to each of the plurality of second exposed ends (822). The input electrode (242) for inputting the measurement input signal and the output electrode (412) for outputting the measurement output signal are changed. In a predetermined plurality of combinations of 2), the following steps are performed: measuring the voltage value of the measurement output signal output from the second exposed end (822) through the output electrode (412) via capacitive coupling when the measurement input signal is input from the input electrode (242) to the first exposed end (821) via capacitive coupling; based on the measured voltage values ​​of the plurality of measurement output signals, estimating each coupling capacitance between the plurality of opposing input electrodes (242) and the plurality of first exposed ends (821), and each coupling capacitance between the plurality of opposing output electrodes (412) and the plurality of second exposed ends (822); when the measurement input signal is input from the input electrode (242) to the first exposed end (821) via capacitive coupling, the voltage value of the measurement output signal output from the second exposed end (822) through the output electrode (412) is calculated. 242) When a specific input signal is input to one of the plurality of first exposed ends (821) that is a specific object on the input side, and an auxiliary signal with an opposite phase to the specific input signal is input from the input electrode (242) to a predetermined first exposed end (821) other than the first exposed end (821) that is a specific object on the input side, through capacitive coupling, a process is performed to measure the voltage value of a specific output signal output from the second exposed end (822) that is a specific object on the output side through capacitive coupling from the plurality of second exposed ends (822) through the output electrode (412), until all Until the second exposed end (822) becomes the output-side specific object, using the estimated value of the coupling capacitance between the second exposed end (822) of the output-side specific object and the output electrode (412), a correction voltage value is calculated by multiplying the voltage value of the specific output signal output from the second exposed end (822) of the output-side specific object by a correction coefficient that has a negative correlation with the coupling capacitance between the second exposed end (822) of the output-side specific object and the output electrode (412). Based on the calculated correction voltage value, the second exposed end (822) corresponding to the first exposed end (821) of the input-side specific object is determined.

[0300] The embodiments of the present invention have been described above, but these embodiments do not limit the invention to the technical solutions claimed in the patent claim. Furthermore, it should be noted that not all combinations of features described in the embodiments are necessarily necessary means to solve the problems of the invention. Additionally, the present invention can be implemented with appropriate modifications without departing from its spirit.

[0301] For example, in the embodiments described above, the estimated value of the coupling capacitance determined by the estimation unit is used to calculate the correction voltage value when determining the correspondence between the plurality of first exposed ends and the plurality of second exposed ends, but this is not limited to this. For example, if the estimated value of the coupling capacitance between the insulated wire and the electrode at a certain location is small based on the estimated value of the coupling capacitance, it can be determined that there is a problem with the fixing method of the insulated wire at that location or with the electrode, and the estimated value can be used for this determination.

Claims

1. A method for estimating coupling capacitance, characterized in that, The multiple input electrodes are respectively positioned opposite the first exposed ends of the multiple insulated wires exposed at one end of the multi-core cable. The multiple output electrodes are respectively positioned opposite the second exposed ends of the multiple insulated wires exposed at the other end of the multi-core cable. In a predetermined combination of input electrodes for inputting the measurement input signal and output electrodes for outputting the measurement output signal, the following steps are performed: measuring the voltage value of the measurement output signal output from the second exposed end through the output electrode via capacitive coupling when the measurement input signal is input from the input electrode to the first exposed end via capacitive coupling. Based on the measured voltage values ​​of the plurality of measured output signals, the coupling capacitances between the plurality of mutually opposed input electrodes and the plurality of first exposed ends and the coupling capacitances between the plurality of mutually opposed output electrodes and the plurality of second exposed ends are estimated.

2. A method for determining the correspondence between the ends of a multi-core cable, comprising using the coupling capacitance estimation method of claim 1 to determine the correspondence between the plurality of first exposed ends and the plurality of second exposed ends, characterized in that, A specific input signal is input from the input electrode to one of the plurality of first exposed ends that is a specific object on the input side via capacitive coupling, and an auxiliary signal with an opposite phase to the specific input signal is input from the input electrode to the first exposed ends other than the first exposed ends that is a specific object on the input side via capacitive coupling. The voltage values ​​of specific output signals output from the plurality of second exposed ends through the output electrode via capacitive coupling are measured. The correction voltage value is calculated by multiplying the voltage value of each of the specific output signals measured at the plurality of second exposed ends with a correction factor calculated using the estimated value of the coupling capacitance estimated by the coupling capacitance estimation method. Based on the calculated correction voltage value, the second exposed end corresponding to the first exposed end of the input-side specific object is determined.

3. The method for determining the correspondence between the ends of a multi-core cable according to claim 2, characterized in that, The correction factor multiplied by the voltage value of the particular output signal is the product of the following two items: an item relating to the coupling capacitance between the second exposed end, which is the output object of the particular output signal, and the output electrode, and an item relating to the reference coupling capacitance, which represents a predetermined reference value of the coupling capacitance between the plurality of opposing second exposed ends and the plurality of output electrodes.

4. The method for determining the correspondence between the ends of a multi-core cable according to claim 2, characterized in that, The correction factor multiplied by the voltage value of the specific output signal is the product of the following two terms: a term that is correlated with the average voltage value of the measurement output signal output from a plurality of second exposed ends when the measurement input signal is input to the first exposed end that is the specific object of the input side, and a term that is correlated with the voltage value of the measurement output signal output from the second exposed end that is the output object of the specific output signal when the measurement input signal is input to the first exposed end that is the specific object of the input side.

5. A coupling capacitance estimation device, characterized in that, have: Multiple input electrodes are respectively arranged opposite to the first exposed ends of the multiple insulated wires exposed at one end of the multi-core cable; A plurality of output electrodes are respectively arranged opposite to the second exposed ends of the plurality of insulated wires exposed at the other end of the multi-core cable; The measuring unit performs the following steps in a predetermined combination of the input electrode for inputting the measuring input signal and the output electrode for outputting the measuring output signal: measuring the voltage value of the measuring output signal output from the second exposed end through the output electrode via capacitive coupling when the measuring input signal is input from the input electrode to the first exposed end via capacitive coupling; An estimation unit, based on the voltage values ​​of the plurality of measurement output signals measured in the measurement unit, estimates the coupling capacitances between the plurality of mutually opposed input electrodes and the plurality of first exposed ends, and the coupling capacitances between the plurality of mutually opposed output electrodes and the plurality of second exposed ends.

6. A method for manufacturing a multi-core cable assembly, The multi-core cable assembly includes: A multi-core cable having multiple insulated wires and an outer sheath covering the multiple insulated wires; The first connected component is electrically connected to each of the first exposed ends of the plurality of insulated wires that protrude from the outer sheath at one end of the multi-core cable; The second connected component is electrically connected to each of the second exposed ends of the plurality of insulated wires that protrude from the outer sheath at the other end of the multi-core cable. Its features are, The method for manufacturing the multi-core cable assembly includes: The process involves determining which second exposed end corresponds to the first exposed end that becomes a specific object among the plurality of first exposed ends; In the connection process, based on the determination results of the plurality of first exposed ends and the plurality of second exposed ends in the determination process, the plurality of first exposed ends are electrically connected to the first connected component, and the plurality of second exposed ends are electrically connected to the second connected component. In the defined process: The plurality of input electrodes are respectively positioned opposite each of the plurality of first exposed ends. The plurality of output electrodes are respectively positioned opposite each of the plurality of second exposed ends. In a predetermined combination of input electrodes for inputting the measurement input signal and output electrodes for outputting the measurement output signal, the following steps are performed: measuring the voltage value of the measurement output signal output from the second exposed end through the output electrode via capacitive coupling when the measurement input signal is input from the input electrode to the first exposed end via capacitive coupling. Based on the measured voltage values ​​of the plurality of measured output signals, the coupling capacitances between the plurality of mutually opposed input electrodes and the plurality of first exposed ends, and the coupling capacitances between the plurality of mutually opposed output electrodes and the plurality of second exposed ends are estimated. A specific input signal is input from the input electrode to one of the plurality of first exposed ends that is a specific object on the input side via capacitive coupling, and an auxiliary signal with an opposite phase to the specific input signal is input from the input electrode to the first exposed ends other than the first exposed ends that is a specific object on the input side via capacitive coupling. The voltage values ​​of specific output signals output from the plurality of second exposed ends respectively through the output electrode are measured. The correction voltage value is calculated by multiplying the voltage value of each of the specific output signals measured at the plurality of second exposed ends with a correction factor calculated using the estimated value of the coupling capacitor. Based on the calculated correction voltage value, the second exposed end corresponding to the first exposed end of the input-side specific object is determined.

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