Pinching detection sensor cable and pinching detection system

Abstract

To provide a pinch detection sensor cable and pinch detection system that can reduce the cost and labor required for manufacturing. [Solution] The pinch detection sensor cable comprises a radially deformable wire, first to fourth insulated wires provided on the outer circumference of the wire, and an elastic insulating member covering the wire and the first to fourth insulated wires. In an orthogonal cross-section, the first to fourth insulated wires are arranged such that the midpoint PA and midpoint PB defined below coincide. At one end, the first insulated wire and the second insulated wire are connected, and the third insulated wire and the fourth insulated wire are connected. Midpoint PA: In the orthogonal cross-section, the midpoint between the center of the first insulated wire and the center of the second insulated wire. Midpoint PB: In the orthogonal cross-section, the midpoint between the center of the third insulated wire and the center of the fourth insulated wire.

Description

Technical Field

[0001] The present disclosure relates to a pinch detection sensor cable and a pinch detection system.

Background Art

[0002] In the sliding doors and hatchback doors of automobiles, linear sensor cables (hereinafter referred to as pinch detection sensor cables) for detecting that a hand or an object has been pinched are provided along the door frames.

[0003] Patent Documents 1 and 2 disclose a pinch detection sensor cable. The pinch detection sensor cable disclosed in Patent Document 1 has a configuration in which a plurality of electrode wires obtained by coating a conductive wire with a conductive material are arranged in a spiral shape and covered with a sheath thereon. When a hand or an object is pinched in the door, a pressing force is applied to a part of the pinch detection sensor cable. When a pressing force is applied to a part of the pinch detection sensor cable, the electrode wires are electrically connected to each other. As a result, it is possible to detect that a hand or an object has been pinched in the door.

[0004] The pinch detection sensor cable disclosed in Patent Document 1 is manufactured by the following method. A plurality of electrode wires and dummy wires are twisted together to form a cable. Next, the cable is cut to a length corresponding to the sensor. Next, the dummy wires are pulled out. By pulling out the dummy wires, a gap is generated between the electrode wires.

[0005] When a gap is generated between the electrode wires, the pinch detection sensor cable is easily deformed when a pressing force is applied. When no pressing force is applied to the pinch detection sensor cable, there is a gap between the electrode wires and the electrode wires are not electrically connected. When a pressing force is applied to the pinch detection sensor cable, the pinch detection sensor cable is deformed and the electrode wires are electrically connected to each other.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Patent No. 3275767 [Patent Document 2] Patent No. 5742670 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] In the pinch detection sensor cable disclosed in Patent Document 1, the conductors need to be covered with a conductive material. Furthermore, when manufacturing the pinch detection sensor cable, a dummy wire must be used and later removed. Therefore, the cost and effort required to manufacture the pinch detection sensor cable were significant.

[0008] In one aspect of this disclosure, it is preferable to provide a pinch detection sensor cable and a pinch detection system that can reduce the cost and effort required for manufacturing. [Means for solving the problem]

[0009] One aspect of the present disclosure is a pinch detection sensor cable comprising a radially deformable wire, first to fourth insulated wires provided on the outer circumference of the wire, and an elastic insulating member covering the wire and the first to fourth insulated wires.

[0010] In the orthogonal cross-section of the pinch detection sensor cable, the first to fourth insulated wires are arranged such that the midpoint PA and midpoint PB, as defined below, coincide. At one end of the pinch detection sensor cable, the first insulated wire and the second insulated wire are connected, and the third insulated wire and the fourth insulated wire are connected.

[0011] Midpoint PA: In the orthogonal cross-section, the midpoint between the center of the first insulated wire and the center of the second insulated wire. Midpoint PB: In the orthogonal cross-section, the midpoint between the center of the third insulated wire and the center of the fourth insulated wire.

[0012] One aspect of this disclosure, the pinch detection sensor cable, can reduce the cost and effort required for manufacturing. [Brief explanation of the drawing]

[0013] [Figure 1] This is a plan view showing the configuration of the pinch detection system. [Figure 2] Figure 1 is an orthogonal cross-sectional view taken at the II-II section. [Figure 3] Figure 1 shows a cross-sectional view taken along the line III-III. [Figure 4] This is a circuit diagram showing the configuration of the input pulse generation unit and the crosstalk detection unit. [Figure 5] This graph shows the results of crosstalk measurements in a pinch detection system. [Figure 6] This graph shows the input pulses obtained through simulation, based on the crosstalk measurement results. [Figure 7] This graph shows the crosstalk obtained from simulations, based on the measured crosstalk results. [Figure 8] This is an explanatory diagram showing an alternative configuration of the input pulse generation unit and the crosstalk detection unit. [Figure 9] This is a cross-sectional view showing another configuration of the pinch detection sensor cable. [Figure 10] This is a cross-sectional view showing another configuration of the pinch detection sensor cable. [Modes for carrying out the invention]

[0014] Exemplary embodiments of this disclosure will be described with reference to the drawings. <First Embodiment> 1. Configuration of the pinch detection system 1 The configuration of the pinch detection system 1 will be explained with reference to Figures 1 to 4. As shown in Figure 1, the pinch detection system 1 comprises a pinch detection sensor cable 3, an input pulse generation unit 5, and a crosstalk detection unit 7.

[0015] The pinching detection sensor cable 3 is a linear member. The length of the pinching detection sensor cable 3 is, for example, 1 m or more and several tens of meters or less. The diameter of the pinching detection sensor cable 3 is, for example, 4 mm or more and 6 mm or less.

[0016] FIG. 2 shows a cross-section orthogonal to the pinching detection sensor cable 3 in the II-II cross-section in FIG. 1. The orthogonal cross-section is a cross-section orthogonal to the longitudinal direction of the pinching detection sensor cable 3. As shown in FIG. 2, the pinching detection sensor cable 3 includes a wire rod 11, a first coated wire 21, a second coated wire 22, a third coated wire 23, a fourth coated wire 24, and an elastic insulating member 31.

[0017] The wire rod 11 extends from one end 3A in the longitudinal direction of the pinching detection sensor cable 3 to the opposite end 3B. The wire rod 11 is a member that can be deformed in the radial direction of the wire rod 11. The wire rod 11 is, for example, a member that can be elastically deformed. In the present embodiment, the wire rod 11 is a hollow tube. When no pressing force F is applied to the pinching detection sensor cable 3, the shape of the wire rod 11 in the orthogonal cross-section is, for example, circular. The pressing force F is a force in a direction that crushes the pinching detection sensor cable 3 in its radial direction. The material of the wire rod 11 is, for example, resin or rubber. The wire rod 11 is, for example, a polyethylene tube. The wire rod 11 may be made of a foamed resin. The foamed resin is, for example, sponge-like. The diameter of the wire rod 11 is, for example, 1.0 mm or more and 4.6 mm or less. The thickness of the wire rod 11 (tube) is, for example, 0.05 mm or more and 0.5 mm or less.

[0018] The first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 each extend from end 3A to end 3B. As shown in Figure 2, the first insulated wire 21 comprises a conductor 33 and an insulator 35. The insulator 35 covers the conductor 33. The material of the conductor 33 is, for example, copper, aluminum, etc. As the conductor 33, for example, a stranded wire made by twisting together seven strands of wire can be used. The material of the insulator 35 is, for example, resin, rubber, etc. As the resin or rubber used for the insulator 35, olefin-based or styrene-based thermoplastic elastomer compositions that do not require a crosslinking process, or rubber-based compositions obtained by crosslinking ethylene-propylene-diene copolymers can be used. The second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 also have the same configuration as the first insulated wire 21.

[0019] For example, in a cross-sectional area, the shapes of the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are all circular. For example, the diameters of the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are the same. For example, the diameters of the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are each between 0.5 mm and 1.0 mm.

[0020] As shown in Figure 2, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are provided on the outer circumference of the wire 11. For example, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are each in contact with the outer surface of the wire 11. For example, in a cross-sectional view, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are arranged at equal intervals along the circumferential direction of the wire 11.

[0021] For example, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are each arranged spirally around the wire 11. That is, assuming that a point on the first insulated wire 21 moves along the first insulated wire 21, that point moves in the longitudinal direction of the pinch detection sensor cable 3 and rotates around the wire 11. The spiral pitch, which is the distance that point moves in the longitudinal direction of the pinch detection sensor cable 3 before completing one rotation, is, for example, 5 mm to 25 mm. The spiral arrangement is the same for the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 as for the first insulated wire 21.

[0022] As shown in Figure 2, in the orthogonal cross-section, the first insulated wire 21 and the second insulated wire 22 face each other with the wire 11 in between. In the orthogonal cross-section, the third insulated wire 23 and the fourth insulated wire 24 face each other with the wire 11 in between. In the orthogonal cross-section, the midpoint between the center of the first insulated wire 21 and the center of the second insulated wire 22 is defined as midpoint PA. In the orthogonal cross-section, the midpoint between the center of the third insulated wire 23 and the center of the fourth insulated wire 24 is defined as midpoint PB.

[0023] In an orthogonal cross-section, the midpoint PA lies on a straight line passing through the center of the first insulated wire 21 and the center of the second insulated wire 22. In an orthogonal cross-section, the distance from the midpoint PA to the center of the first insulated wire 21 is equal to the distance from the midpoint PA to the center of the second insulated wire 22. In an orthogonal cross-section, the midpoint PB lies on a straight line passing through the center of the third insulated wire 23 and the center of the fourth insulated wire 24. In an orthogonal cross-section, the distance from the midpoint PB to the center of the third insulated wire 23 is equal to the distance from the midpoint PB to the center of the fourth insulated wire 24.

[0024] In the portion of the pinch detection sensor cable 3 where no pressing force F is applied, the midpoints PA and PB coincide in an orthogonal cross-section, as shown in Figure 2. In the portion where no pressing force F is applied, for example, in an orthogonal cross-section, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are positioned at the vertices of a square.

[0025] As shown in Figure 1, when a pressing force F is applied to a portion 3C, which is part of the pinch detection sensor cable 3, portion 3C deforms. Portion 3C is any portion of the pinch detection sensor cable 3. Figure 3 shows a cross-sectional view of the pinch detection sensor cable 3 at portion 3C. In portion 3C, the wire 11 and the elastic insulating member 31 deform radially, and the positions of the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are shifted compared to when no pressing force F is applied. As a result, in the cross-sectional view of portion 3C, the midpoint PA and midpoint PB do not coincide.

[0026] The elastic insulating member 31 extends from end 3A to end 3B. The elastic insulating member 31 is a hollow cylindrical member. The elastic insulating member 31 covers the wire 11, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24. Therefore, the wire 11, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are housed inside the elastic insulating member 31.

[0027] When a pressing force F is applied, the elastic insulating member 31 elastically deforms in the radial direction of the pinch detection sensor cable 3. Therefore, as shown in Figure 3, in section 3C, the elastic insulating member 31 is deformed in the radial direction of the pinch detection sensor cable 3. The thickness of the elastic insulating member 31 is, for example, 0.2 mm or more and 0.4 mm or less. The material of the elastic insulating member 31 is, for example, resin, rubber, etc. Examples of resins or rubbers used for the elastic insulating member 31 include olefin-based or styrene-based thermoplastic elastomer compositions, and rubber-based compositions obtained by crosslinking ethylene-propylene-diene copolymers.

[0028] As shown in Figure 2, in the orthogonal cross-section, the portion that is on the outer circumference side of the wire 11 and on the inner circumference side of the elastic insulating member 31 is defined as the intermediate portion 32. The intermediate portion 32 exists between the first insulated wire 21 and the fourth insulated wire 24, between the fourth insulated wire 24 and the second insulated wire 22, between the second insulated wire 22 and the third insulated wire 23, and between the third insulated wire 23 and the first insulated wire 21.

[0029] In the intermediate portion 32, for example, there is an intervening material. The intervening material is a soft material such as rayon yarn or resin string. In this case, the first coated wire 21, the second coated wire 22, the third coated wire 23, and the fourth coated wire 24 are embedded in the intervening material.

[0030] For example, when manufacturing the pinch detection sensor cable 3, the intervening material is twisted together with the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24. The intervening material does not need to be pulled out and can be left in place.

[0031] For example, when manufacturing the pinch detection sensor cable 3, tape can be wrapped around the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 before the elastic insulating member 31 is installed. In this case, the elastic insulating member 31 can be installed while the positions of the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are stable.

[0032] Furthermore, there may or may not be a gap between the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 and the elastic insulating member 31.

[0033] As shown in Figure 1, at end 3A, the first insulated wire 21 and the second insulated wire 22 are directly connected (i.e., short-circuited). Also at end 3A, the third insulated wire 23 and the fourth insulated wire 24 are directly connected (i.e., short-circuited). As shown in Figure 1, at end 3B, the input pulse generator 5 connects to the first insulated wire 21 and the second insulated wire 22 and generates an input pulse 37. At end 3B, the crosstalk detection unit 7 connects to the third insulated wire 23 and the fourth insulated wire 24 and detects crosstalk 39.

[0034] The connection between the first insulated wire 21 and the second insulated wire 22 at end 3A may be a direct connection (i.e., a short circuit) or a connection via a resistor of several ohms to tens of ohms. Similarly, the connection between the third insulated wire 23 and the fourth insulated wire 24 at end 3A may be a direct connection (i.e., a short circuit) or a connection via a resistor of several ohms to tens of ohms.

[0035] For example, the connection between the first insulated wire 21 and the second insulated wire 22 at end 3A, and the connection between the third insulated wire 23 and the fourth insulated wire 24 at end 3A, may both be made via resistors of several ohms to tens of ohms.

[0036] For example, either the connection between the first insulated wire 21 and the second insulated wire 22 at end 3A, or the connection between the third insulated wire 23 and the fourth insulated wire 24 at end 3A, may be a direct connection (i.e., a short circuit), while the other may be a connection via a resistor of several ohms to tens of ohms.

[0037] For example, the input pulse generation unit 5 is composed of a timer IC 41, as shown in Figure 4. Examples of timer IC 41 include the TLC555. For example, the crosstalk detection unit 7 is composed of an operational amplifier 43, a rectifier circuit 45, and a comparator 47, as shown in Figure 4. The operational amplifier 43 detects the crosstalk signal generated between the third insulated wire 23 and the fourth insulated wire 24, and the amplified signal is converted into an amplitude equivalent to the crosstalk by the rectifier circuit 45. When this amplitude equivalent exceeds a certain threshold, the comparator 47 outputs a signal to detect whether or not pinching has occurred.

[0038] The pinch detection system 1 can be used, for example, in vehicle sliding doors, train doors, etc. The pinch detection sensor cable 3 is installed, for example, along the door frame of a vehicle sliding door, train door, etc. The pinch detection system 1 detects, for example, when a hand or object is caught in the door.

[0039] 2. Effects of the pinch detection system 1 (1A) When no pressing force F is applied to any part of the pinch detection sensor cable 3, the midpoint PA and midpoint PB coincide in the orthogonal cross-section of any part of the pinch detection sensor cable 3, as shown in Figure 2. Therefore, even if the input pulse generation unit 5 generates an input pulse 37, the crosstalk voltage 39 detected by the crosstalk detection unit 7 is low.

[0040] On the other hand, if a hand or object gets caught in the door, a pressing force F is applied to part 3C, causing it to deform. In part 3C, as shown in Figure 3, the midpoint PA and midpoint PB do not coincide in the orthogonal cross-section. Therefore, the voltage of the crosstalk 39 detected by the crosstalk detection unit 7 increases. Thus, using the pinch detection system 1, it is possible to detect that a pressing force F has been applied to any part of the pinch detection sensor cable 3 (i.e., that a hand or object has been caught in the door) based on the voltage of the crosstalk 39 detected by the crosstalk detection unit 7.

[0041] The higher the frequency of the input pulse 37, the higher the crosstalk voltage 39 becomes, and the better the detection sensitivity of the pinch detection sensor cable 3.

[0042] In this specification, the agreement between midpoint PA and midpoint PB is not necessarily limited to a strict agreement. For example, if the crosstalk 39 when no pressing force F is applied to any part of the pinch detection sensor cable 3 is low enough not to significantly hinder the detection of the pressing force F, then a misalignment between midpoint PA and midpoint PB is acceptable.

[0043] (1B) When manufacturing the pinch detection sensor cable 3, it is not necessary to incorporate a conductive filler such as carbon black into the insulator 35 of the first coated wire 21, the second coated wire 22, the third coated wire 23, and the fourth coated wire 24, as described in Patent Document 1. Furthermore, when manufacturing the pinch detection sensor cable 3, it is not necessary to use a dummy wire and then remove the dummy wire, as described in Patent Document 1. Therefore, the cost and labor required to manufacture the pinch detection sensor cable 3 can be reduced.

[0044] (1C) In the technology described in Patent Document 1, when a pressing force F is applied to a part of the cable, the pressing force F cannot be detected until the internal electrode wires come into contact with each other. In contrast, the pinch detection system 1 can detect crosstalk 39 corresponding to the amount of deformation even if the amount of deformation is small when a pressing force F is applied to part 3C. Therefore, the pinch detection system 1 can detect the pressing force F with high sensitivity.

[0045] (1D) The greater the pressing force F applied to section 3C, the greater the deformation in section 3C. The greater the deformation in section 3C, the greater the displacement between the midpoint PA and midpoint PB, and the greater the crosstalk voltage 39. Therefore, the greater the pressing force F applied to section 3C, the greater the crosstalk voltage 39. Thus, by using the pinch detection system 1, the magnitude of the pressing force F applied to section 3C can be determined based on the crosstalk voltage 39.

[0046] For example, when the pinch detection system 1 is used on a vehicle's sliding door or a train's door, the magnitude of the pressing force F applied to section 3C is determined based on the crosstalk voltage 39, and the vehicle's sliding door or train's door can be controlled with excellent response according to the determined magnitude of the pressing force F.

[0047] (1E) For example, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are arranged spirally around the wire 11. In this case, no matter where the pressing force F is applied to the portion 3C, there is a place near the portion 3C where the difference between the midpoint PA and the midpoint PB tends to be large. Therefore, the pressing force F can be detected with high sensitivity no matter where the pressing force F is applied to the portion 3C.

[0048] (1F) For example, in a cross-sectional area, the first insulated wire 21, the second insulated wire 22, the third insulated wire 23, and the fourth insulated wire 24 are positioned at the vertices of a square. In this case, the crosstalk voltage 39 can be further suppressed when no pressing force F is applied to any part of the pinch detection sensor cable 3.

[0049] (1G) In this embodiment, the wire 11 is a hollow tube. In this case, when a pressing force F is applied to portion 3C, the wire 11 is more easily deformed, and the displacement between the midpoint PA and midpoint PB becomes even larger. Therefore, the detection sensitivity to the pressing force F becomes even higher.

[0050] 3. Examples A pinch detection system 1 was prepared. Crosstalk 39 was measured when no pressing force F was applied to any part of the pinch detection sensor cable 3. Crosstalk 39 was also measured when part 3C was gripped with pliers and a pressing force F was applied. The measurement results are shown in Figure 5. The vertical axis in Figure 5 represents the magnitude of crosstalk 39. The solid line, "Free," represents the measurement result when no pressing force F is applied to any part of the pinch detection sensor cable 3. The dashed line, "Pinch," represents the measurement result when part 3C is gripped with pliers and a pressing force F is applied.

[0051] Next, based on these measurement results, a simulation of the pulse response was performed using a circuit model. The pulse period was 500 nsec. The impedance of the drive circuit was 50 Ω. The impedance of the crosstalk detection side was 250 Ω. The input pulse 37 obtained from the simulation is shown in Figure 6. The crosstalk 39 obtained from the simulation is shown in Figure 7. Figure 7 shows the crosstalk 39 for the "Free" case, represented by a solid line, and the crosstalk 39 for the "Pinch" case, represented by a dashed line. The crosstalk 39 for the "Pinch" case had a significantly higher output voltage compared to the crosstalk 39 for the "Free" case. The results of this simulation prove that the pinch detection system 1 can detect the pressing force F.

[0052] <Other Embodiments> Although embodiments of this disclosure have been described above, this disclosure is not limited to the embodiments described above and can be implemented in various modified forms.

[0053] (1) The input pulse generation unit 5 and the crosstalk detection unit 7 may be an integrated device, as shown in Figure 8. This device consists of a microcontroller 51, a rectifier circuit 53, and an operational amplifier 55. (2) The form of the pinch detection sensor cable 3 may be the form shown in Figure 9. In the form shown in Figure 9, the wire 11 consists of interlining. The interlining is, for example, rayon yarn. The pinch detection sensor cable 3 also further comprises four interlinings 61. The interlinings 61 are provided in orthogonal cross-sections between the first insulated wire 21 and the fourth insulated wire 24, between the fourth insulated wire 24 and the second insulated wire 22, between the second insulated wire 22 and the third insulated wire 23, and between the third insulated wire 23 and the first insulated wire 21. The interlinings 61 are, for example, rayon yarn.

[0054] (3) The form of the pinch detection sensor cable 3 may be the form shown in Figure 10. In the form shown in Figure 10, the wire 11 is an intervening made of resin. The wire 11 is composed of a hollow pipe-shaped central part 11A and eight partition walls 11B extending from the central part 11A in the outer peripheral direction. The eight partition walls 11B are arranged at intervals along the circumferential direction of the central part 11A in a cross-sectional orthogonal view. The thickness of the central part 11A and the thickness of the partition walls 11B are, for example, 0.05 mm or more and 0.5 mm or less, respectively. The thickness of the central part 11A and the thickness of the partition walls 11B may be the same or different. For example, the thickness of the central part 11A may be less than or greater than the thickness of the partition walls 11B.

[0055] Two partition walls 11B are provided between the first insulated wire 21 and the fourth insulated wire 24, between the fourth insulated wire 24 and the second insulated wire 22, between the second insulated wire 22 and the third insulated wire 23, and between the third insulated wire 23 and the first insulated wire 21.

[0056] (4) The wire 11 may be a string made of resin. In this case, when a pressing force F is applied to part 3C, the wire 11 is more easily deformed, and the displacement between the midpoint PA and midpoint PB becomes even larger. As a result, the detection sensitivity to the pressing force F becomes even higher. (5) The function of one component in each of the above embodiments may be divided among multiple components, or the function of multiple components may be performed by one component. Also, some of the configurations of each of the above embodiments may be omitted. Also, at least some of the configurations of each of the above embodiments may be added to, replaced with, etc., the configurations of other embodiments.

[0057] (6) In addition to the pinch detection system 1 and pinch detection sensor cable 3 described above, this disclosure can also be implemented in various forms, such as systems using them as components, and methods for manufacturing the pinch detection sensor cable 3.

[0058] [Technical concepts disclosed in this specification] [Item 1] This is a pinch detection sensor cable, A wire that can be deformed in the radial direction, The first to fourth insulated wires provided on the outer circumference of the aforementioned wire, The wire material and the elastic insulating member covering the first to fourth coated wires, Equipped with, In the orthogonal cross-section of the pinch detection sensor cable, the first to fourth insulated wires are arranged such that the midpoint PA and midpoint PB, as defined below, coincide. At one end of the pinch detection sensor cable, the first insulated wire and the second insulated wire are connected, and the third insulated wire and the fourth insulated wire are connected. Pinch detection sensor cable. Midpoint PA: In the orthogonal cross-section, the midpoint between the center of the first insulated wire and the center of the second insulated wire. Midpoint PB: In the orthogonal cross-section, the midpoint between the center of the third insulated wire and the center of the fourth insulated wire. [Item 2] The pinch detection sensor cable described in item 1, In the orthogonal cross-section, the first to fourth covering wires are positioned at the vertices of one square. Pinch detection sensor cable. [Item 3] A pinch detection sensor cable as described in item 1 or 2, The aforementioned wire material is a hollow tube or a string made of resin. Pinch detection sensor cable. [Item 4] The pinch detection sensor cable described in one of items 1 to 3, An input pulse generating unit is configured to generate an input pulse, connected to the first insulated wire and the second insulated wire at the end opposite to the aforementioned one end, At the opposite end, a crosstalk detection unit is connected to the third insulated wire and the fourth insulated wire and configured to detect crosstalk, A pinch detection system equipped with the following features. [Explanation of Symbols]

[0059] 1...Pinch detection system, 3...Pinch detection sensor cable, 3A, 3B...End, 5...Input pulse generation unit, 7...Crosstalk detection unit, 11...Wire, 11A...Center, 11B...Partition, 21...First insulated wire, 22...Second insulated wire, 23...Third insulated wire, 24...Fourth insulated wire, 31...Elastic insulating member, 32...Intermediate part, 33...Conductor, 35...Insulator, 37...Input pulse, 39...Crosstalk, 41...Timer IC, 43...Operational amplifier, 45...Rectifier circuit, 47...Comparator, 51...Microcontroller, 53...Rectifier circuit, 55...Operational amplifier, 61...Intervening

Claims

1. This is a pinch detection sensor cable, A wire that can be deformed in the radial direction, The first to fourth insulated wires provided on the outer circumference of the aforementioned wire, The wire material and the elastic insulating member covering the first to fourth coated wires, Equipped with, In the orthogonal cross-section of the pinch detection sensor cable, the first to fourth insulated wires are arranged such that the midpoint PA and midpoint PB, as defined below, coincide. At one end of the pinch detection sensor cable, the first insulated wire and the second insulated wire are connected, and the third insulated wire and the fourth insulated wire are connected. Pinch detection sensor cable. Midpoint PA: In the orthogonal cross-section, the midpoint between the center of the first insulated wire and the center of the second insulated wire. Midpoint PB: In the orthogonal cross-section, the midpoint between the center of the third insulated wire and the center of the fourth insulated wire.

2. A pinch detection sensor cable according to claim 1, In the orthogonal cross-section, the first to fourth covering lines are positioned at the vertices of one square. Pinch detection sensor cable.

3. A pinch detection sensor cable according to claim 1 or 2, The aforementioned wire material is a hollow tube or a string made of resin. Pinch detection sensor cable.

4. A pinch detection sensor cable according to claim 1 or 2, An input pulse generating unit is configured to generate an input pulse by connecting the first insulated wire and the second insulated wire at the end opposite to the aforementioned one end, At the opposite end, a crosstalk detection unit is connected to the third insulated wire and the fourth insulated wire and configured to detect crosstalk, A pinch detection system equipped with the following features.

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