Wire rope inspection device and wire rope inspection system

Abstract

A wire rope inspection device (100) includes a first detection coil (30), a second detection coil (40), and a processing unit (61). The second detection coil is arranged to be inclined with respect to the first detection coil as viewed from a direction (X direction) orthogonal to a first direction (Z direction) in which the first detection coil moves relative to the wire rope (W). The processing unit acquires an abnormal position of the wire rope in the first direction based on a detection signal detected by the first detection coil, and acquires a region of the abnormal position of the wire rope within a cross section based on a detection signal detected by the second detection coil.

Description

Technical Field

[0001] This invention relates to a wire rope inspection device and a wire rope inspection system, and more particularly to a wire rope inspection device and a wire rope inspection system equipped with a detection coil for detecting the magnetic flux of a wire rope. Background Technology

[0002] Previously, a wire rope inspection device was known that uses a detection coil to detect changes in the magnetic flux of a wire rope. Such a wire rope inspection device is disclosed in International Publication No. 2019 / 171667.

[0003] International Publication No. 2019 / 171667 discloses a wire rope inspection device (magnetic body inspection device) comprising an excitation unit for the wire rope (magnetic body) and a detection coil for detecting the magnetic flux (magnetic field) of the wire rope. The wire rope inspection device described in International Publication No. 2019 / 171667 is configured such that, while moving the detection coil relative to the wire rope, the detection coil detects changes in the magnetic flux of the wire rope caused by the applied magnetic flux from the excitation unit, thereby obtaining the location (abnormal location) of damage to the wire rope in the direction of relative movement of the detection coil relative to the wire rope.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: International Publication No. 2019 / 171667 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] However, while the wire rope inspection device described in International Publication No. 2019 / 171667 can locate the position of damage (abnormal location) in the direction of relative movement of the detection coil relative to the wire rope, it cannot pinpoint the exact location of the damage within the cross-section of the wire rope. That is, it cannot distinguish between the internal and external areas of the wire rope's cross-section where the abnormality exists. Therefore, although not explicitly described in International Publication No. 2019 / 171667, visual inspection has historically been necessary to determine whether the abnormality is internal or external. Wire rope inspections are mostly conducted in dark places without lighting; for example, wire breakage is a very subtle abnormality with a wire diameter Φ of less than 1 mm and a break width of less than 1 mm. Therefore, being able to pre-determine whether the abnormality is internal or external—that is, to pre-determine the abnormal area within the wire rope's cross-section—is extremely valuable information in actual wire rope inspection operations. Therefore, it is desirable to obtain not only the abnormal position in the direction of relative movement of the detection coil relative to the wire rope, but also the abnormal region within the cross-section of the wire rope.

[0009] The present invention was made to solve the problems described above. One object of the present invention is to provide a wire rope inspection device and a wire rope inspection system that can not only obtain the abnormal position in the direction of relative movement of the detection coil relative to the wire rope, but also obtain the abnormal area within the cross section of the wire rope.

[0010] Solution for solving the problem

[0011] To achieve the above objectives, a wire rope inspection apparatus according to a first aspect of the present invention comprises: a plurality of detection coils that move relative to each other along the direction in which the wire rope extends and detect the magnetic flux of the wire rope; and a processing unit that acquires and processes detection signals detected by the plurality of detection coils, wherein the plurality of detection coils includes a first detection coil and a second detection coil, the first detection coil being arranged along the circumference of the wire rope and the second detection coil being arranged along the circumference of the wire rope and configured to be tilted relative to the first detection coil from a direction orthogonal to a first direction in which the first detection coil moves relative to the wire rope; and the processing unit is configured to: acquire an abnormal position of the wire rope in a first direction based on the detection signals detected by the first detection coil, and acquire, based on the detection signals detected by the second detection coil, the region of the abnormal position of the wire rope within a cross section at the acquired abnormal position of the wire rope in the first direction.

[0012] A second aspect of the present invention provides a wire rope inspection system comprising: a wire rope inspection device having a plurality of detection coils that move relative to each other along the direction in which the wire rope extends and detect the magnetic flux of the wire rope; and a processing device that acquires and processes detection signals detected by the plurality of detection coils, wherein the plurality of detection coils includes a first detection coil and a second detection coil, the first detection coil being arranged along the circumference of the wire rope and the second detection coil being arranged along the circumference of the wire rope and configured to be tilted relative to the first detection coil from a direction orthogonal to a first direction in which the first detection coil moves relative to the wire rope; and the processing device being configured to: acquire an abnormal position of the wire rope in a first direction based on the detection signals detected by the first detection coil, and acquire, based on the detection signals detected by the second detection coil, a region of the abnormal position of the wire rope within a cross-section at the acquired abnormal position of the wire rope in the first direction.

[0013] The effects of the invention

[0014] In the wire rope inspection device of the first aspect and the wire rope inspection system of the second aspect described above, as described above, the plurality of detection coils include a first detection coil and a second detection coil. The first detection coil is arranged circumferentially along the wire rope, and the second detection coil is also arranged circumferentially along the wire rope, configured to be tilted relative to the first detection coil from a direction orthogonal to a first direction in which the first detection coil moves relative to the wire rope. Here, the second detection coil is configured to be tilted relative to the first detection coil from a direction orthogonal to the first direction; therefore, the time taken for each of the first and second detection coils to traverse the abnormal region within the cross-section of the wire rope varies depending on the position of the abnormal region on the cross-section. Thus, the detection times of the abnormality detection signals detected by the first and second detection coils differ depending on the position of the abnormal region within the cross-section of the wire rope. Furthermore, since the geometric tilt configuration of the second detection coil is known in advance, the abnormal region within the cross-section of the wire rope can be determined based on the deviation in detection time between the detection signals of the abnormality detected by the first and second detection coils. As a result, a wire rope inspection device and system are provided that can not only obtain the abnormal position in the direction of relative movement of the detection coil relative to the wire rope, but also obtain the abnormal area within the cross section of the wire rope. Attached Figure Description

[0015] Figure 1 This is a diagram showing an elevator equipped with a wire rope inspection device according to the first embodiment.

[0016] Figure 2 This is a block diagram showing the structure of the wire rope inspection device according to the first embodiment.

[0017] Figure 3 This is a side view showing the structure of the wire rope.

[0018] Figure 4 This is a cross-sectional view showing the structure of the wire rope.

[0019] Figure 5 This is a cross-sectional view of the wire rope inspection device according to the first embodiment.

[0020] Figure 6 This is a diagram showing the structure of the excitation coil in the first embodiment.

[0021] Figure 7 This is a side view of the wire rope inspection device according to the first embodiment.

[0022] Figure 8 This is a side view showing the structure of the magnetic field application section of the wire rope inspection device according to the first embodiment.

[0023] Figure 9 This is a diagram showing the configuration of the detection coil in the first embodiment.

[0024] Figure 10 This is a side view (1) of the detection coil of the first embodiment.

[0025] Figure 11 This is a side view (2) of the detection coil of the first embodiment.

[0026] Figure 12 This is a diagram showing an example of the cross-sectional location of a wire rope.

[0027] Figure 13 This is a diagram showing an example of the detection signal detected by the first detection coil.

[0028] Figure 14 This is a diagram showing an example of the detection signal detected by the second detection coil.

[0029] Figure 15 This is a diagram showing an example of the detection signal detected by the third detection coil.

[0030] Figure 16 This is a diagram showing the lifting path and elevator of the wire rope inspection device according to the second embodiment.

[0031] Figure 17 This is a diagram showing the detection coil of the wire rope inspection device according to the third embodiment. Detailed Implementation

[0032] The embodiments embodied in the present invention will now be described with reference to the accompanying drawings.

[0033] [First Implementation Method]

[0034] Reference Figures 1 to 15 The structure of the wire rope inspection system 300 according to the first embodiment will be described. Furthermore, in the following description, "orthogonal" means crossing at angles of approximately 90°.

[0035] (Structure of a wire rope inspection system)

[0036] like Figure 1 As shown, the wire rope inspection system 300 is a system for inspecting for abnormalities (such as wire breakage) in a wire rope W, which is a magnetic material. The wire rope inspection system 300 includes: a wire rope inspection device 100 that measures the magnetic flux of the wire rope W; and a processing device 200 that displays the measurement results of the magnetic flux of the wire rope W obtained by the wire rope inspection device 100 and performs analysis based on these measurement results. By using the wire rope inspection system 300 to inspect for abnormalities in the wire rope W, abnormalities that are difficult to detect visually can be identified.

[0037] exist Figure 1 The diagram illustrates an example of a wire rope inspection device 100 inspecting the wire rope W used in the movement of the car 111 of an elevator 110. The elevator 110 includes a car 111 and a winch 112 for driving the wire rope W. The elevator 110 is configured to move the car 111 in the vertical direction (Z direction) by moving the wire rope W using the winch 112. The wire rope inspection device 100 inspects the wire rope W for damage while it is fixed in a state where it does not move relative to the wire rope W.

[0038] The wire rope W is configured to extend in the Z-direction at the location of the wire rope inspection device 100. The wire rope inspection device 100 measures the magnetic flux of the wire rope W while moving relative to the wire rope W in the Z-direction along its surface. In cases where the wire rope W moves itself, such as the wire rope W used in elevator 110, the magnetic flux of the wire rope W is measured using the wire rope inspection device 100 while moving the wire rope W in the Z-direction. Therefore, the magnetic flux at various locations of the wire rope W in the Z-direction can be measured, and damage to the wire rope W at various locations in the Z-direction can be detected.

[0039] (Structure of the processing device)

[0040] Processing device 200 (reference) Figure 1 For example, a personal computer. The processing unit 200 is configured in a different space than the space where the wire rope inspection device 100 is located. Figure 1As shown, the processing device 200 includes a communication unit 201, a processing unit 202, a storage unit 203, and a display unit 204. The communication unit 201 is a communication interface that connects the wire rope inspection device 100 to the processing device 200 in a communicative manner. The processing device 200 receives measurement results (measurement data) of the wire rope W obtained by the wire rope inspection device 100 via the communication unit 201. The processing unit 202 controls various parts of the processing device 200. The processing unit 202 includes a processor such as a CPU, a memory, etc. The processing unit 202 analyzes damage to the wire rope W, such as wire breakage, based on the measurement results of the wire rope W received via the communication unit 201. The storage unit 203 is a storage medium, such as flash memory, used to store (preserve) information such as the measurement results of the wire rope W and the analysis results of the measurement results of the wire rope W obtained by the processing unit 202. The display unit 204 is, for example, an LCD monitor, used to display information such as the measurement results of the wire rope W and the analysis results of the measurement results of the wire rope W obtained by the processing unit 202.

[0041] (Structure of the wire rope inspection device)

[0042] like Figure 2 As shown, the wire rope inspection device 100 includes a detection unit 1 and an electronic circuit unit 2. The detection unit 1 detects (measures) the magnetic flux of the wire rope W. Specifically, the detection unit 1 includes an excitation coil 10 and a detection coil 20. The excitation coil 10 is configured to move relative to the wire rope W and apply magnetic flux to the wire rope W. The excitation coil 10 generates a magnetic field along the Z direction inside (inside the coil) by flowing an excitation alternating current, and applies the generated magnetic field to the wire rope W disposed inside. Furthermore, the excitation coil 10 is an example of the "excitation unit" of this disclosure.

[0043] The detection coil 20 moves relative to the wire rope W and detects (measures) the magnetic flux of the wire rope W to which the excitation coil 10 has applied a magnetic field. The detection coil 20 sends a detection signal (differential signal) corresponding to the detected magnetic flux of the wire rope W. Furthermore, the detection coil 20 includes a first detection coil 30, a second detection coil 40, and a third detection coil 50. A detailed description of the detection coil 20 will be provided later.

[0044] Furthermore, the first detection coil 30, the second detection coil 40, and the third detection coil 50 are examples of the "multiple detection coils" disclosed herein.

[0045] The electronic circuit section 2 includes a processing unit 61, a receiving I / F (interface) 62, an excitation I / F 63, a power supply circuit 64, a storage unit 65, and a communication unit 66. The processing unit 61 is configured to control each part of the wire rope inspection device 100. The processing unit 61 includes a processor such as a CPU (central processing unit), memory, and an AD converter. The receiving I / F 62 receives (acquires) the detection signal (differential signal) from the detection coil 20 and sends it to the processing unit 61. The receiving I / F 62 includes an amplifier. The receiving I / F 62 amplifies the detection signal from the detection coil 20 using the amplifier and sends it to the processing unit 61. The excitation I / F 63 receives a control signal from the processing unit 61. The excitation I / F 63 controls the power supply to the excitation coil 10 based on the received control signal. The power supply circuit 64 receives power from an external source to supply power to each part of the wire rope inspection device 100, including the excitation coil 10. Storage unit 65 is a storage medium, such as flash memory, used to store (save) information such as measurement results (measurement data) of the wire rope W. Communication unit 66 is a communication interface that connects the wire rope inspection device 100 and the processing device 200 in a communicative manner.

[0046] In addition, the wire rope W is as follows Figure 3 and Figure 4 As shown, the magnetic material is formed by twisting together multiple strands of magnetic wire material, i.e., strands S, which are long strips of material extending along the Z direction. Furthermore, the strands S are composed of multiple strands twisted together. To prevent the wire rope W from breaking due to deterioration, the condition of the wire rope W (the presence or absence of damage, etc.) is checked using a wire rope inspection device 100. Wire ropes W judged to have deteriorated beyond a predetermined standard based on the measurement results of the magnetic flux of the wire rope W are replaced by the operator.

[0047] (Structure related to the excitation coil)

[0048] like Figure 5 As shown, in elevator 110 (reference) Figure 1 Multiple wire ropes W are installed within the structure. These wire ropes W are arranged (parallel to each other) in a direction orthogonal to their respective long side direction (Z direction) (X direction). For example... Figure 5 As shown, the excitation coil 10 is configured to surround a plurality of wire ropes W. Furthermore, the excitation coil 10 is configured to simultaneously excite the magnetization state of the plurality of wire ropes W. Specifically, it is configured such that a magnetic field generated in the excitation coil 10 based on the excitation alternating current flowing through it is applied along the Z-direction to the plurality of wire ropes W inside the excitation coil 10.

[0049] The wire rope W passes through the interior (inner side) of the excitation coil 10 and the detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50). Furthermore, the detection coils 20 are positioned inside the excitation coil 10. The detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) are configured to surround the wire rope W when viewed from the Z-direction. For example... Figure 5 As shown, the detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) have a ring-shaped (circular) shape when viewed from the Z direction. Furthermore, the detection coils 20 can have an oblong shape or a track shape when viewed from the Z direction. Additionally, the detection coils 20 can also have a rectangular shape when viewed from the Z direction.

[0050] In addition, such as Figure 6 As shown, the excitation coil 10 includes a printed circuit board 10b having a first conductive portion 10a formed thereon. Additionally, the excitation coil 10 includes a printed circuit board 10d having a second conductive portion 10c formed thereon. The first conductive portion 10a and the second conductive portion 10c are electrically connected. Furthermore, the configuration of the excitation coil 10 and the detection coil 20 is not limited to this. Figure 3 The detection coil 20 and Figure 3 and Figure 4 The excitation coil 10 is schematically illustrated, and sometimes differs from the actual configuration (structure).

[0051] like Figure 7 As shown, an excitation coil 10 is shared by multiple detection coils 20 (first detection coil 30, second detection coil 40 and third detection coil 50).

[0052] In addition, such as Figure 7 As shown, the wire rope inspection device 100 includes magnetic field application units 71 and 72. The magnetic field application units 71 and 72 pre-apply a magnetic field to the wire rope W to adjust the magnitude and direction of the magnetic field of the wire rope W, which is a magnetic body. The magnetic field application units 71 and 72 are arranged such that the excitation coil 10 and a plurality of detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) are sandwiched in the Z direction.

[0053] (Structure of the magnetic field application section)

[0054] like Figure 8As shown, the magnetic field applying units 71 and 72 are configured to apply a magnetic field to the wire rope W, which is the object to be inspected, in the Y direction (the direction intersecting the X direction where the wire rope W extends), thereby adjusting the magnitude and direction of the magnetization of the wire rope W, which is a magnetic body. Furthermore, the magnetic field applying unit 71 includes magnets 71a and 71b, and the magnetic field applying unit 72 includes magnets 72a and 72b. The magnetic field applying units 71 (magnets 71a and 71b) are disposed on one side (Z2 direction side) of the wire rope W's extension direction relative to the detection unit 1 (excitation coil 10, first detection coil 30, second detection coil 40, and third detection coil 50). Conversely, the magnetic field applying units 72 (magnets 72a and 72b) are disposed on the other side (Z1 direction side) of the wire rope W's extension direction relative to the detection unit 1 (excitation coil 10, first detection coil 30, second detection coil 40, and third detection coil 50). Alternatively, only one of the magnetic field applying units 71 and 72 may be provided.

[0055] The magnetic field applying parts 71 (magnets 71a and 71b) are configured to apply a magnetic field in the Y direction parallel to the XY plane intersecting the Z direction. The magnetic field applying parts 72 (magnets 72a and 72b) are configured to apply a magnetic field in the Y direction parallel to the XY plane intersecting the Z direction. That is, the magnetic field applying parts 71 and 72 are configured to apply a magnetic field in the Y direction, which is approximately orthogonal to the Z direction (the direction of the long side of the strip material) in which the wire rope W extends.

[0056] (Structures related to the detection coil)

[0057] In the first embodiment, such as Figure 9 As shown, a first detection coil 30, a second detection coil 40, and a third detection coil 50 are set for each of the multiple steel wire ropes W.

[0058] In the first embodiment, the first detection coil 30, the second detection coil 40, and the third detection coil 50 are configured to move relative to the plurality of wire ropes W and detect the magnetic flux of the plurality of wire ropes W.

[0059] The first detection coil 30 has a first receiving coil 31 and a second receiving coil 32, wherein the second receiving coil 32 is differentially connected to the first receiving coil 31 and is disposed in the Z direction (Z1 direction) of the first receiving coil 31. The first receiving coil 31 and the second receiving coil 32 are configured to be connected in series with opposite directions of coil rotation, and the current flows in opposite directions to each other in response to changes in magnetic flux in the Z1 direction.

[0060] Similarly, the second detection coil 40 has a first receiving coil 41 and a second receiving coil 42, wherein the second receiving coil 42 is differentially connected to the first receiving coil 41 and is positioned in the Z direction (Z1 direction) of the first receiving coil 41. The first receiving coil 41 and the second receiving coil 42 are configured to be connected in series with opposite directions of coil rotation, and the current flows in opposite directions to each other in response to changes in magnetic flux in the Z1 direction.

[0061] Furthermore, the third detection coil 50 has a first receiving coil 51 and a second receiving coil 52, wherein the second receiving coil 52 is differentially connected to the first receiving coil 51 and is positioned in the Z direction (Z1 direction) of the first receiving coil 51. The first receiving coil 51 and the second receiving coil 52 are configured to be connected in series with opposite directions of coil rotation, and the current flows in opposite directions to each other in response to changes in magnetic flux in the Z1 direction.

[0062] The first detection coil 30 is configured to output a differential signal between the signal obtained by the first receiving coil 31 and the signal obtained by the second receiving coil 32 as a detection signal. The second detection coil 40 is configured to output a differential signal between the signal obtained by the first receiving coil 41 and the signal obtained by the second receiving coil 42 as a detection signal. Furthermore, the third detection coil 50 is configured to output a differential signal between the signal obtained by the first receiving coil 51 and the signal obtained by the second receiving coil 52 as a detection signal.

[0063] Furthermore, the first detection coil 30, the second detection coil 40, and the third detection coil 50 are arranged at equal intervals in the Z direction. The detection coils 20 are arranged in the order of first detection coil 30, second detection coil 40, and third detection coil 50, starting from the Z2 direction side. Additionally, the multiple first detection coils 30, multiple second detection coils 40, and multiple third detection coils 50 provided for each of the multiple wire ropes W are respectively arranged such that adjacent first detection coils 30, adjacent second detection coils 40, and adjacent third detection coils 50 in the X direction overlap when viewed from the X direction. Furthermore, the multiple first detection coils 30, multiple second detection coils 40, and multiple third detection coils 50 provided for each of the multiple wire ropes W can also be arranged such that they are staggered in the Z direction from adjacent first detection coils 30, adjacent second detection coils 40, and adjacent third detection coils 50 in the X direction.

[0064] In the first embodiment, the first detection coil 30, the second detection coil 40, and the third detection coil 50 are arranged circumferentially along the wire rope W. The first detection coil 30 is as follows: Figure 10 and Figure 11As shown, the first receiving coil 31 and the second receiving coil 32 are orthogonal to the first direction (Z direction) in which they move relative to the wire rope W, as viewed from the X and Y directions.

[0065] The second detection coil 40 Figure 10 As shown, the second detection coil 40 is configured to be tilted relative to the first detection coil 30 when viewed from a direction orthogonal to the first direction (Z direction) in which the first detection coil 30 moves relative to the wire rope W. Furthermore, the second detection coil 40 is configured to be tilted relative to the third detection coil 50 when viewed from the X direction. That is, the second detection coil 40 is configured to be tilted relative to both the first detection coil 30 and the third detection coil 50 when viewed from the X direction. The second detection coil 40 is positioned along any strand S constituting the wire rope W (along the twist of the strand S) when viewed from the X direction (see reference). Figure 3 It is arranged at an angle.

[0066] Moreover, the third detection coil 50, such as Figure 11 As shown, the third detection coil 50 is configured to be tilted relative to the first detection coil 30 when viewed from the third direction orthogonal to the Z and X directions, namely the Y direction. Furthermore, the third detection coil 50 is configured to be tilted relative to the second detection coil 40 when viewed from the Y direction. That is, the third detection coil 50 is configured to be tilted relative to the first detection coil 30 and the second detection coil 40 when viewed from the Y direction. The third detection coil 50 is positioned along any strand S constituting the wire rope W (along the twist of the strand S) (see reference). Figure 3 It is arranged at an angle.

[0067] (Structures related to the detection of detection signals)

[0068] Regarding wire rope W, Figure 12 The diagram shows the positions of cross-sections A to K (detection positions) in the Z-direction within the XY plane of the wire rope W. Furthermore, cross-section C is located at the center of the wire rope W. Cross-sections A, B, C, D, and E are positioned in the order A, B, C, D, E, starting from the Y1 direction side. Cross-section A is located at the end of the wire rope W in the Y1 direction side, and cross-section E is located at the end of the wire rope W in the Y2 direction side. Cross-sections B, F, and I are in the same position in the Y direction. Additionally, cross-sections C, G, and J are in the same position in the Y direction, as are cross-sections D, H, and K.

[0069] Section positions A through E are located at the center of the wire rope W in the X direction. Furthermore, section position J is located at the end of the wire rope W on the X1 direction side, and section position G is located at the end of the wire rope W on the X2 direction side. Additionally, in the X direction, section positions I and K are positioned between section position J and section positions A through E, and section positions I and K are at the same position in the Y direction. In the X direction, section positions F and H are positioned between section position G and section positions A through E, and section positions F and H are at the same position in the Y direction. Furthermore, as described later... Figures 13-15 One example of the detection signal shown is an anomaly occurring at all cross-sectional positions A to K in the Z direction of the wire rope W. Furthermore, as described later... Figures 13-15 In one example of the detection signal shown, the detection coil 20 (first detection coil 30, second detection coil 40 and third detection coil 50) moves relative to the wire rope W in the Z2 direction.

[0070] First detection coil 30 Figure 13 As shown, the detector is configured to detect a detection signal having a peak corresponding to the detection position of the wire rope W in the Z direction (first direction). Specifically, the first detection coil 30 detects a detection signal at time t1 that has a peak corresponding to the detection signal at cross-sectional positions A to K, which are at the same position in the Z direction. The first detection coil 30 passes through cross-sectional positions A to K of the wire rope W at the same time (time t1). Therefore, if there is an abnormal position at the cross-sectional positions A to K, such as Figure 13 As shown, at time t1, an abnormal signal (peak) is detected in the detection signal of the first detection coil 30. When anomalies occur at all cross-sectional positions A to K, at time t1, a relatively large detection signal (peak) is detected in the detection signal of the first detection coil 30, formed by the overlap (addition) of the peaks corresponding to the detection signals at cross-sectional positions A to K.

[0071] The second detection coil 40 passes sequentially through cross-sections A to K (detection positions) of the wire rope W, starting from the cross-section position on the Y1 direction side. Specifically, at time t4, it passes cross-section position A; at time t5, it passes cross-section positions B, F, and I; then at time t6, it passes cross-section positions C, G, and J; at time t7, it passes cross-section positions D, H, and K; and finally, at time t8, it passes cross-section position E.

[0072] In the first embodiment, the second detection coil 40 is as follows Figure 14 As shown, the detection signal is configured to detect a region containing multiple detection positions of the wire rope W in the Y direction (the direction intersecting the first direction).

[0073] Specifically, the second detection coil 40 is configured to detect the detection signal by separating the peaks corresponding to the region including the cross-sectional positions A to K (detection positions) where the detection signal was detected by the first detection coil 30 at time t1 in the Y direction (the direction intersecting the first direction). In the event of anomalies at all cross-sectional positions A to K, the detection signal detected by the second detection coil 40 has a peak at time t4 corresponding to the detection signal at cross-sectional position A. Furthermore, the detection signal detected by the second detection coil 40 has a peak at time t5 that overlaps with the peaks corresponding to the detection signals at cross-sectional positions B, F, and I. Additionally, the detection signal detected by the second detection coil 40 has a peak at time t6 that overlaps with the peaks corresponding to the detection signals at cross-sectional positions C, G, and J. The detection signal detected by the second detection coil 40 has a peak at time t7 that overlaps with the peaks corresponding to the detection signals at cross-sectional positions D, H, and K. Finally, the detection signal detected by the second detection coil 40 has a peak at time t8 corresponding to the detection signal at cross-sectional position E.

[0074] Furthermore, the third detection coil 50 sequentially passes through cross-sections A to K (detection positions) of the wire rope W, starting from the cross-section position in the X1 direction. That is, at time t9, it passes through cross-section position J; at time t10, it passes through cross-section positions I and K; then, at time t11, it passes through cross-section positions A to E; at time t12, it passes through cross-section positions F and H; and finally, at time t13, it passes through cross-section position G.

[0075] In the first embodiment, the third detection coil 50 is configured to detect a detection signal having a peak corresponding to a region including multiple detection positions of the wire rope W in the X direction.

[0076] Specifically, the third detection coil 50 is configured to detect the detection signal by separating the peaks corresponding to the region including the cross-sectional positions A to K (detection positions) where the detection signal was detected by the first detection coil 30 at time t1 in the X direction. In the event of anomalies at all cross-sectional positions A to K, the detection signal detected by the third detection coil 50 has a peak at time t9 corresponding to the detection signal at cross-sectional position J. Furthermore, the detection signal detected by the third detection coil 50 has a peak at time t10 that overlaps with the peaks corresponding to the detection signals at cross-sectional positions I and K. Additionally, the detection signal detected by the third detection coil 50 has a peak at time t11 that overlaps with the peaks corresponding to the detection signals at cross-sectional positions A to E. The detection signal detected by the third detection coil 50 has a peak at time t12 that overlaps with the peaks corresponding to the detection signals at cross-sectional positions F and H. Finally, the detection signal detected by the second detection coil 40 has a peak at time t13 corresponding to the detection signal at cross-sectional position G.

[0077] (Structure of the processing department)

[0078] In the first embodiment, the processing unit 61 is configured to acquire the abnormal position of the wire rope W in the Z direction based on the detection time of the peak of the detection signal detected by the first detection coil 30. Furthermore, the processing unit 61 is configured to acquire the abnormal position of the wire rope W in the cross-section (XY plane) at the acquired abnormal position of the wire rope W in the first direction (Z direction) based on the detection time of the peak of the detection signals detected by the second detection coil 40 and the third detection coil 50.

[0079] In the first embodiment, the processing unit 61 is configured to: obtain the position of the abnormal position of the wire rope W in the Y direction within a cross section (XY) at the abnormal position of the acquired wire rope W in the first direction (Z direction) based on the magnitude of the deviation between the detection time of the peak of the detection signal detected by the second detection coil 40 and the detection time of the peak of the detection signal detected by the first detection coil 30. Furthermore, in the first embodiment, the processing unit 61 is configured to: obtain the position of the abnormal position of the acquired wire rope W in the X direction within a cross section (XY) at the abnormal position of the acquired wire rope W in the first direction (Z direction) based on the magnitude of the deviation between the detection time of the peak of the detection signal detected by the third detection coil 50 and the detection time of the peak of the detection signal detected by the first detection coil 30 or the detection time of the peak of the detection signal detected by the second detection coil 40.

[0080] The processing unit 61 is configured to obtain the position of the abnormal position of the wire rope W in the Z direction based on the detection time of the peak of the detection signal detected by the first detection coil 30. For example, if the peak of the abnormal signal is detected at time t1, the position of the abnormal position in the Z direction is the position of the cross-section positions A to K in the Z direction.

[0081] Furthermore, the processing unit 61 is configured to acquire the position of the abnormal position of the wire rope W in the Y direction within the cross section (XY plane) at the abnormal position of the acquired wire rope W in the first direction (Z direction) based on the detection time of the peak of the detection signal detected by the second detection coil 40. For example, if the peak of the abnormal signal is detected at time t7, the position of the abnormal position in the X direction is the position of the cross section positions D, H, and K in the X direction.

[0082] Furthermore, the processing unit 61 is configured to acquire the position of the abnormal position of the wire rope W in the X direction within the cross section (XY plane) at the abnormal position of the acquired wire rope W in the first direction (Z direction) based on the detection time of the peak of the detection signal detected by the third detection coil 50. For example, if the peak of the abnormal signal is detected at time t12, the position of the abnormal position in the Y direction is the position of the cross section position F and H in the Y direction.

[0083] Here, when an anomaly occurs at section position H among sections A through K, the detection signal detected by the first detection coil 30 has an abnormal signal peak at time t1, the detection signal detected by the second detection coil 40 has an abnormal signal peak at time t7, and the detection signal detected by the third detection coil 50 has an abnormal signal peak at time t12. The processing unit 61 can obtain the positions of the abnormal location in the Z direction (section positions A through K), in the Y direction (section positions D, H, and K), and in the X direction (section positions F and H) based on the peaks of the detection signals detected by the first detection coil 30, the second detection coil 40, and the third detection coil 50. Therefore, the processing unit 61 can determine that the abnormal location is section position H based on the peaks of the detection signals detected by the first detection coil 30, the second detection coil 40, and the third detection coil 50.

[0084] Furthermore, when anomalies occur at cross-section positions C and H among cross-section positions A to K, the detection signal detected by the first detection coil 30 has an abnormal signal peak at time t1, the detection signal detected by the second detection coil 40 has abnormal signal peaks at times t6 and t7, and the detection signal detected by the third detection coil 50 has abnormal signal peaks at times t11 and t12. The processing unit 61 can obtain the positions of the abnormal locations in the Z direction at cross-section positions A to K based on the peaks of the detection signals detected by the first detection coil 30. Additionally, the processing unit 61 can obtain the positions of the abnormal locations in the Y direction at cross-section positions C, G, and J, and cross-section positions D, H, and K, based on the peaks of the detection signals detected by the second detection coil 40. Moreover, the processing unit 61 can obtain the positions of the abnormal locations in the X direction at cross-section positions A to E, and cross-section positions F and H, based on the peaks of the detection signals detected by each of the third detection coils 50. Therefore, the processing unit 61 can determine whether the abnormal location is one of the three locations (section positions C, D, and H) or one of the two locations (section positions C and H) based on the peaks of the detection signals detected by the first detection coil 30, the second detection coil 40, and the third detection coil 50. Furthermore, if the peak height of the abnormal signal at time t6 is the same as the peak height of the abnormal signal at time t7, the processing unit 61 assumes that there are no overlapping peaks (peaks at section positions D and H) at time t7, and therefore can determine that the abnormal location is section positions C and H. Based on these results, the processing unit 61 can determine that the abnormal location is section positions C and H. In other words, the wire rope inspection device 100 of the first embodiment can determine multiple abnormal locations within the cross-section of the wire rope W.

[0085] Furthermore, the processing unit 61 is configured to acquire the abnormal position in the cross section (XY plane) of each of the multiple wire ropes W in the direction intersecting the Z direction based on the peak of the detection signal detected by the first detection coil 30, the second detection coil 40 and the third detection coil 50.

[0086] Furthermore, the abnormal locations within the cross-section (XY plane) of each of the multiple wire ropes W obtained by the processing unit 61 are, for example, as follows: Figure 12 That is displayed on the display unit 204 of the processing device 200.

[0087] (Effects of the first implementation method)

[0088] In the first embodiment, the following effects can be obtained.

[0089] In the first embodiment, as described above, the plurality of detection coils 20 includes a first detection coil 30 and a second detection coil 40. The first detection coil 30 is arranged circumferentially along the wire rope W, and the second detection coil 40 is also arranged circumferentially along the wire rope W and configured to be tilted relative to the first detection coil 30 from a direction orthogonal to the first detection coil 30 relative to the wire rope W (Z direction). Here, the second detection coil 40 is configured to be tilted relative to the first detection coil 30 from the X direction orthogonal to the Z direction. Therefore, the time taken for the first detection coil 30 and the second detection coil 40 to traverse the abnormal region within the cross-section of the wire rope W varies depending on the position of the abnormal region on the cross-section. Consequently, the detection times of the abnormality detection signals detected by the first detection coil 30 and the second detection coil 40 differ depending on the position of the abnormal region within the cross-section of the wire rope W. Furthermore, since the geometric tilt configuration of the second detection coil 40 is known in advance, the abnormal region within the cross-section of the wire rope W can be determined based on the deviation in detection time between the abnormal detection signals detected by the first detection coil 30 and the abnormal detection signals detected by the second detection coil 40. As a result, in addition to obtaining the abnormal position in the direction (Z direction) of the relative movement of the detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) relative to the wire rope W, the abnormal region within the cross-section of the wire rope W can also be obtained.

[0090] Furthermore, the wire rope inspection device 100 of the first embodiment described above can achieve further effects as follows by being configured as described below.

[0091] Furthermore, in the first embodiment, as described above, the processing unit 61 is configured to obtain the abnormal position of the wire rope W in a first direction (Z direction) based on the detection time of the peak of the detection signal detected by the first detection coil 30, where the first direction is the direction in which the detection coil 20 moves relative to the wire rope W. Therefore, the abnormal position of the wire rope W in the Z direction can be obtained based on the time until the abnormal detection signal detected by the first detection coil 30 is detected, making it easier to obtain the abnormal position of the wire rope W in the Z direction. Additionally, the processing unit 61 is configured to obtain the abnormal position of the wire rope W within the cross-section (XY plane) at the obtained abnormal position of the wire rope W in the Z direction based on the detection time of the peak of the detection signal detected by the second detection coil 40. Therefore, the abnormal position of the wire rope W within the cross-section (XY plane) of the wire rope W can be obtained based on the time until the abnormal detection signal detected by the second detection coil 40 is detected, making it easier to obtain the abnormal position within the cross-section (XY plane) of the wire rope W.

[0092] Furthermore, in the first embodiment, the processing unit 61 is configured to obtain the abnormal position of the wire rope W within the cross-section (XY plane) at the abnormal position of the obtained wire rope W in the first direction (Z direction) based on the magnitude of the deviation between the detection time of the peak of the detection signal detected by the second detection coil 40 and the detection time of the peak of the detection signal detected by the first detection coil 30. Therefore, the abnormal position of the wire rope W within the cross-section (XY plane) of the wire rope W can be obtained based on the magnitude of the deviation between the detection time of the peak of the abnormal detection signal detected by the second detection coil 40 and the detection time of the peak of the abnormal detection signal detected by the first detection coil 30, thus making it easier to obtain the abnormal position within the cross-section (XY plane) of the wire rope W.

[0093] Furthermore, in the first embodiment, as described above, the plurality of detection coils 20 includes a third detection coil 50, which is configured to be tilted relative to the first detection coil 30 when viewed from the Y direction. Here, the third detection coil 50 is configured to be tilted relative to the first detection coil 30 when viewed from the Y direction, which is orthogonal to the Z direction. Therefore, the deviation in detection time between the abnormal detection signal detected by the first detection coil 30 and the abnormal detection signal detected by the third detection coil 50 varies depending on the position of the abnormal location within the cross-section of the wire rope W in the X direction. Thus, the position of the abnormal location within the cross-section of the wire rope W in the X direction can be determined based on the magnitude of the deviation in detection time between the abnormal detection signal detected by the first detection coil 30 and the abnormal detection signal detected by the third detection coil 50. As a result, in addition to easily obtaining the abnormal position in the direction (Z direction) in which the detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) move relative to the wire rope W, the position of the abnormal location within the cross-section of the wire rope W in the X direction can also be easily obtained.

[0094] Furthermore, in the first embodiment, as described above, the second detection coil 40 is configured to be inclined relative to the first detection coil 30 and the third detection coil 50 when viewed from the X direction, and the third detection coil 50 is configured to be inclined relative to the first detection coil 30 and the second detection coil 40 when viewed from the Y direction. Here, the second detection coil 40 is configured to be inclined relative to the first detection coil 30 and the third detection coil 50 when viewed from the X direction, which is orthogonal to the Z direction. Therefore, the deviation in the detection time of the abnormal detection signal detected by the first detection coil 30, the abnormal detection signal detected by the second detection coil 40, and the abnormal detection signal detected by the third detection coil 50 varies depending on the position of the abnormal location in the cross-section of the wire rope W in the Y direction. Thus, the position of the abnormal location in the cross-section of the wire rope W in the Y direction can be determined based on the magnitude of the deviation in the detection time of the abnormal detection signal detected by the first detection coil 30, the abnormal detection signal detected by the second detection coil 40, and the abnormal detection signal detected by the third detection coil 50. Furthermore, the third detection coil 50 is configured to be tilted relative to the first detection coil 30 and the second detection coil 40 when viewed from the Y direction, which is orthogonal to the Z direction. Therefore, the deviation in the detection time of the abnormal detection signals detected by the first detection coil 30, the second detection coil 40, and the third detection coil 50 varies depending on the position of the abnormal location within the cross-section of the wire rope W in the X direction. Thus, the position of the abnormal location within the cross-section of the wire rope W in the X direction can be determined based on the magnitude of the deviation in the detection time of the abnormal detection signals detected by the first detection coil 30, the second detection coil 40, and the third detection coil 50. Based on these results, in addition to easily obtaining the abnormal position in the direction (Z direction) in which the detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) move relative to the wire rope W, it is also easy to obtain the abnormal position in the X and Y directions within the cross-section of the wire rope W.

[0095] Furthermore, in the first embodiment, as described above, the processing unit 61 obtains the position of the abnormal position of the wire rope W in the Z direction based on the detection time of the peak of the detection signal detected by the first detection coil 30. Therefore, the abnormal position of the wire rope W in the Z direction can be obtained based on the time up to the detection time of the abnormal detection signal detected by the first detection coil 30, making it easier to obtain the abnormal position of the wire rope W in the Z direction. Additionally, the position of the abnormal position of the wire rope W in the Y direction within the cross-section (XY plane) at the obtained abnormal position of the wire rope W in the Z direction is obtained based on the detection time of the peak of the detection signal detected by the second detection coil 40. Therefore, the abnormal position of the wire rope W in the Y direction within the XY plane can be obtained based on the time up to the detection time of the abnormal detection signal detected by the second detection coil 40, making it easier to obtain the abnormal position of the wire rope W in the Y direction within the XY plane. Furthermore, the processing unit 61 is configured to acquire, based on the detection time of the peak of the detection signal detected by the third detection coil 50, the position of the abnormal position of the wire rope W in the X direction within the cross-section (XY plane) at the acquired abnormal position in the Z direction. Therefore, the abnormal position of the wire rope W in the X direction can be acquired based on the time until the abnormal detection signal detected by the third detection coil 50 is detected, making it easier to acquire the abnormal position of the wire rope W in the X direction within the XY plane. Based on these results, it is easier to acquire the positions of the abnormal position of the wire rope W in the Z direction, the X direction, and the Y direction.

[0096] Furthermore, in the first embodiment, as described above, the processing unit 61 is configured to acquire the abnormal position in the direction intersecting the Z direction within the cross section of each of the plurality of wire ropes W based on the peaks of the detection signals detected by the first detection coil 30, the second detection coil 40, and the third detection coil 50. Therefore, the abnormal positions within the cross section of each of the plurality of wire ropes W can be acquired in summary.

[0097] Furthermore, in the first embodiment, as described above, a first detection coil 30, a second detection coil 40, and a third detection coil 50 are provided for each of the plurality of wire ropes W. Therefore, compared to the case where the first detection coil 30, the second detection coil 40, and the third detection coil 50 are shared among the plurality of wire ropes W, the abnormal position of each of the plurality of wire ropes W can be obtained with high precision.

[0098] Furthermore, in the first embodiment, as described above, an excitation coil 10 (excitation unit) is provided that moves relative to the wire rope W and applies magnetic flux to the wire rope W. The excitation coil 10 is shared by multiple detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50). Therefore, unlike the case where each of the multiple detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) has its own excitation coil 10, the multiple detection coils 20 are not affected by the magnetic flux applied by the excitation coil 10 other than the excitation coil 10 corresponding to each of the multiple detection coils 20. As a result, the first detection coil 30, second detection coil 40, and third detection coil 50 can each detect the detection signal with high precision.

[0099] Furthermore, in the first embodiment, magnetic field applying units 71 and 72 are provided as described above. These units pre-apply a magnetic field to the wire rope W to adjust the magnitude and direction of the magnetic field of the wire rope W, which is a magnetic body. Moreover, the excitation coil 10 (excitation unit) is configured to apply a magnetic field generated by the flow of alternating current to the wire rope W. Therefore, the magnitude and direction of magnetization of the wire rope W to which the excitation coil 10 applies a magnetic field can be adjusted using the magnetic field applying units 71 and 72. As a result, noise generated in the detection signal detected by the detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50) can be suppressed.

[0100] [Second Implementation]

[0101] Reference Figure 16 The structure of the wire rope inspection system 400 according to the second embodiment will be described.

[0102] In the second embodiment, the abnormal position of the wire rope W in the Z direction is acquired by the processing unit 420 of the wire rope inspection system 400, rather than by the processing unit 61 of the wire rope inspection device 100, and the region of the abnormal position of the wire rope W within the cross-section at the acquired abnormal position of the wire rope W in the Z direction is acquired. Specifically, the processing unit 61 of the wire rope inspection device 410 (refer to...) Figure 2 The first detection coil 30, the second detection coil 40, and the third detection coil 50 are transmitted to the processing device 420 via the communication unit 56. The processing unit 402 of the processing device 420 is configured to acquire and process the detection signals detected by the first detection coil 30, the second detection coil 40, and the third detection coil 50 via the communication unit 201.

[0103] The processing unit 402 of the processing device 420 is configured to: acquire the abnormal position of the wire rope W in the Z direction based on the detection signal detected by the first detection coil 30, and acquire the abnormal position of the wire rope W in the cross section at the acquired abnormal position of the wire rope W in the Z direction based on the detection signals detected by the second detection coil 40 and the third detection coil 50.

[0104] Furthermore, the other structures and effects of the second embodiment are the same as those of the first embodiment described above.

[0105] [Third Implementation Method]

[0106] Reference Figure 17 The structure of the wire rope inspection system 500 according to the third embodiment will be described.

[0107] In the third embodiment, the first detection coil 530, the second detection coil 540, and the third detection coil 550 are configured to be able to be divided in the Y direction orthogonal to the Z direction. That is, the first detection coil 530, the second detection coil 540, and the third detection coil 550 are configured to be able to be divided in the Y direction orthogonal to the long side direction (Z direction) of the plurality of wire ropes W and the X direction adjacent to the plurality of wire ropes W.

[0108] The first detection coil 530 includes a first receiving coil 531 and a second receiving coil 532. The first receiving coil 531 is disposed in a direction orthogonal to the Z direction (Y direction), and the second receiving coil 532 is configured to clamp the wire rope W together with the first receiving coil 531 on the side opposite to the side where the first receiving coil 531 is disposed (Y2 direction side) (Y1 direction side) with respect to the wire rope W. The first receiving coil 531 and the second receiving coil 532 are differentially connected. Furthermore, the first receiving coil 531 is an example of the "first part" of this disclosure, and the second receiving coil 532 is an example of the "second part" of this disclosure.

[0109] The first receiving coil 531 and the second receiving coil 532 are configured to be connected in series with the coils rotating in opposite directions, and the current flows in opposite directions to each other in response to the change in magnetic flux in the Z1 direction.

[0110] Furthermore, the second detection coil 540 includes a first receiving coil 541 and a second receiving coil 542. The first receiving coil 541 is disposed in a direction orthogonal to the Z direction (Y direction), and the second receiving coil 542 is configured to clamp the wire rope W together with the first receiving coil 541 on the side opposite to the side where the first receiving coil 541 is disposed (Y2 direction side) (Y1 direction side) with respect to the wire rope W. The first receiving coil 541 and the second receiving coil 542 are differentially connected. Moreover, the first receiving coil 541 is an example of the "first part" of this disclosure, and the second receiving coil 542 is an example of the "second part" of this disclosure.

[0111] The first receiving coil 541 and the second receiving coil 542 are configured to be connected in series with the coils rotating in opposite directions, and the current flows in opposite directions to each other in response to the change in magnetic flux in the Z1 direction.

[0112] Furthermore, the third detection coil 550 includes a first receiving coil 551 and a second receiving coil 552. The first receiving coil 551 is disposed in a direction orthogonal to the Z direction (Y direction), and the second receiving coil 552 is configured to clamp the wire rope W together with the first receiving coil 551 on the side opposite to the side where the first receiving coil 551 is disposed (Y2 direction side) (Y1 direction side) with respect to the wire rope W. The first receiving coil 551 and the second receiving coil 552 are differentially connected. Moreover, the first receiving coil 551 is an example of the "first part" of this disclosure, and the second receiving coil 552 is an example of the "second part" of this disclosure.

[0113] The first receiving coil 551 and the second receiving coil 552 are configured to be connected in series with the coils rotating in opposite directions, and the current flows in opposite directions to each other in response to the change in magnetic flux in the Z1 direction.

[0114] Furthermore, the other structures of the third embodiment are the same as those of the first embodiment described above.

[0115] (Effects of the third implementation method)

[0116] In the third embodiment, the following effect can be obtained.

[0117] In the third embodiment, as described above, the first detection coil 530, the second detection coil 540, and the third detection coil 550 each include a first receiving coil 531, 541, and 551 (first part) and a second receiving coil 532, 542, and 552 (second part). The first receiving coils 531, 541, and 551 are respectively arranged in a direction orthogonal to the Z direction (Y direction). The second receiving coils 532, 542, and 552 are arranged such that they, along with the first receiving coils 531, 541, and 551, clamp the wire rope W in the middle on the side opposite to the side where the first receiving coils 531, 541, and 551 are arranged relative to the wire rope W. Thus, the first detection coil 530 can be divided into a first receiving coil 531 and a second receiving coil 532 in a direction orthogonal to the Z direction (Y direction). Similarly, the second detection coil 540 can be divided into a first receiving coil 541 and a second receiving coil 542 in a direction orthogonal to the Z direction (Y direction). Furthermore, the third detection coil 550 can be divided into a first receiving coil 551 and a second receiving coil 552 in a direction orthogonal to the Z direction (Y direction). As a result, the first detection coil 530, the second detection coil 540, and the third detection coil 550 can be easily installed or removed from the wire rope W.

[0118] Furthermore, the other effects of the third embodiment are the same as those of the first embodiment described above.

[0119] [Variation Example]

[0120] Furthermore, the embodiments disclosed herein should be considered illustrative in all respects and not restrictive. The scope of the invention is shown not by the description of the above embodiments but by the claims, and also includes all modifications (variations) within the meaning and scope equivalent to the claims.

[0121] For example, the wire rope inspection systems 300 and 400 described in the first and second embodiments above are examples of systems for inspecting the wire rope W used in elevator 110, but the present invention is not limited thereto. In the present invention, the wire rope inspection system can also be a system for inspecting wire ropes used in cranes, suspension bridges, robots, etc. Furthermore, when the wire rope itself does not move, such as the wire rope used in a suspension bridge, the magnetic flux of the wire rope can be measured by moving the wire rope inspection device along the wire rope.

[0122] Furthermore, the first embodiment described above illustrates an example where the processing unit 61 detects anomalies in the wire rope W based on the peaks of the detection signals detected by the detection coil 20, but the present invention is not limited thereto. In the present invention, anomalies in the wire rope can also be detected based on references other than the peaks of the detection signals detected by multiple detection coils.

[0123] In the first embodiment, an example is shown as described above where the second detection coil 40 is configured to be tilted relative to the first detection coil 30 when viewed from the X direction (a direction orthogonal to the first direction), but the invention is not limited thereto. In the present invention, the second detection coil may also be configured to be tilted relative to the first detection coil when viewed from the Y direction, which is orthogonal to the first direction.

[0124] Furthermore, in the first embodiment, as described above, an example is shown where the plurality of detection coils 20 include a third detection coil 50 configured to be tilted relative to the first detection coil 30 when viewed from the Y direction; however, the invention is not limited thereto. In the present invention, the third detection coil may be omitted, and the system may be configured to acquire the region of an abnormal position of the wire rope in any direction orthogonal to the first direction within the cross-section of the wire rope based on the detection signals detected by the first and second detection coils.

[0125] Furthermore, in the first embodiment, as described above, an example is shown where the second detection coil 40 is configured to be tilted relative to the first detection coil 30 and the third detection coil 50 when viewed from the X direction, and the third detection coil 50 is configured to be tilted relative to the first detection coil 30 and the second detection coil 40 when viewed from the Y direction; however, the present invention is not limited thereto. In the present invention, it is also possible that the second detection coil is configured to be tilted relative to one of the first and third detection coils when viewed from the X direction, and the third detection coil is configured to be tilted relative to one of the first and second detection coils when viewed from the Y direction.

[0126] Furthermore, in the first embodiment, as described above, an example is shown where a first detection coil 30, a second detection coil 40, and a third detection coil 50 are provided for each of the plurality of wire ropes W; however, the present invention is not limited thereto. In the present invention, the first detection coil, the second detection coil, and the third detection coil may also be provided in a common manner for each of the plurality of wire ropes. Additionally, in the present invention, either one of the first detection coil, the second detection coil, and the third detection coil may be provided in a common manner for each of the plurality of wire ropes, or one of the first detection coil, the second detection coil, and the third detection coil may be provided for each of the plurality of wire ropes.

[0127] Furthermore, in the first embodiment, an example is shown where an excitation coil 10 (excitation section) is shared by multiple detection coils 20 (first detection coil 30, second detection coil 40, and third detection coil 50), but the present invention is not limited thereto. In the present invention, excitation sections may also be provided for the first detection coil, the second detection coil, and the third detection coil separately.

[0128] [Way]

[0129] Those skilled in the art will understand that the above exemplary embodiments are specific examples of the following methods.

[0130] (Project 1)

[0131] A wire rope inspection device, comprising:

[0132] Multiple detection coils, which move relative to each other along the direction of the steel wire rope, and detect the magnetic flux of the steel wire rope; and

[0133] The processing unit acquires and processes the detection signals detected by the plurality of detection coils.

[0134] The plurality of detection coils includes a first detection coil and a second detection coil. The first detection coil is arranged along the circumference of the steel wire rope, and the second detection coil is also arranged along the circumference of the steel wire rope. The second detection coil is configured to be tilted relative to the first detection coil when viewed from a direction orthogonal to a first direction in which the first detection coil moves relative to the steel wire rope.

[0135] The processing unit is configured to: acquire the abnormal position of the wire rope in the first direction based on the detection signal detected by the first detection coil, and acquire the region of the abnormal position of the wire rope within the cross section at the acquired abnormal position of the wire rope in the first direction based on the detection signal detected by the second detection coil.

[0136] (Project 2)

[0137] According to the wire rope inspection device described in Project 1, wherein...

[0138] The first detection coil is configured to detect a detection signal having a peak corresponding to the detection position of the wire rope in the first direction.

[0139] The second detection coil is configured to detect a detection signal having a peak corresponding to a region including multiple detection positions of the wire rope in a direction intersecting the first direction.

[0140] The processing unit is configured to: obtain the abnormal position of the wire rope in the first direction based on the detection time of the peak of the detection signal detected by the first detection coil, and obtain the abnormal position of the wire rope in the cross section at the obtained abnormal position of the wire rope in the first direction based on the detection time of the peak of the detection signal detected by the second detection coil.

[0141] (Project 3)

[0142] According to the wire rope inspection device described in Project 2, wherein,

[0143] The processing unit is configured to: obtain the abnormal position of the wire rope in the cross section at the obtained abnormal position of the wire rope in the first direction based on the magnitude of the deviation between the detection time of the peak of the detection signal detected by the second detection coil and the detection time of the peak of the detection signal detected by the first detection coil.

[0144] (Project 4)

[0145] According to any one of items 1 to 3, the wire rope inspection device, wherein...

[0146] The second detection coil is configured to be tilted relative to the first detection coil when viewed from the X direction, which is the second direction and is orthogonal to the Z direction, which is the first direction.

[0147] The plurality of detection coils also includes a third detection coil, which is arranged circumferentially along the wire rope and configured to be tilted relative to the first detection coil when viewed from the Y direction, a third direction orthogonal to the Z and X directions.

[0148] The processing unit is configured to: obtain the abnormal position of the wire rope in the Z direction based on the detection signal detected by the first detection coil, and obtain the abnormal position of the wire rope in the cross section at the obtained abnormal position of the wire rope in the first direction based on the detection signals detected by the second detection coil and the third detection coil.

[0149] (Project 5)

[0150] According to the wire rope inspection device described in Project 4, wherein...

[0151] The second detection coil is configured to be tilted relative to the first and third detection coils when viewed from the X direction.

[0152] The third detection coil is configured to be tilted relative to the first and second detection coils when viewed from the Y direction.

[0153] (Project 6)

[0154] According to the wire rope inspection device described in Project 5, wherein...

[0155] The first detection coil is configured to detect a detection signal having a peak corresponding to the detection position of the steel wire rope in the Z direction.

[0156] The second detection coil is configured to detect a detection signal having peaks corresponding to a region including multiple detection positions of the wire rope in the Y direction.

[0157] The third detection coil is configured to detect a detection signal having peaks corresponding to a region including multiple detection positions of the wire rope in the X direction.

[0158] The processing unit is configured to: obtain the position of the abnormal position of the wire rope in the Z direction based on the detection time of the peak of the detection signal detected by the first detection coil; obtain the position of the abnormal position of the wire rope in the Y direction within the cross section at the obtained abnormal position of the wire rope in the Z direction based on the detection time of the peak of the detection signal detected by the second detection coil; and obtain the position of the abnormal position of the wire rope in the X direction within the cross section at the obtained abnormal position of the wire rope in the Z direction based on the detection time of the peak of the detection signal detected by the third detection coil.

[0159] (Project 7)

[0160] According to the wire rope inspection device described in item 4 or 5, wherein...

[0161] Multiple steel wire ropes are provided.

[0162] The processing unit is configured to: obtain the abnormal position in the direction intersecting the Z direction within the cross section of each of the multiple steel wire ropes based on the peak of the detection signal detected by the first detection coil, the second detection coil and the third detection coil respectively.

[0163] (Project 8)

[0164] According to the wire rope inspection device described in Project 7, wherein...

[0165] Each of the plurality of steel wire ropes is provided with a first detection coil, a second detection coil, and a third detection coil.

[0166] (Project 9)

[0167] According to the wire rope inspection device described in Project 8, wherein...

[0168] The first detection coil, the second detection coil, and the third detection coil each include a first part and a second part, wherein the first part is disposed in a direction orthogonal to the Z direction, and the second part is disposed on the side opposite to the side where the first part is disposed, together with the first part, to clamp the wire rope in the middle.

[0169] (Project 10)

[0170] According to any one of items 1 to 9, the wire rope inspection device, wherein...

[0171] It also includes an excitation unit that moves relative to the wire rope and applies magnetic flux to the wire rope.

[0172] The excitation unit is shared by the multiple detection coils.

[0173] (Project 11)

[0174] According to the wire rope inspection device described in Project 10, wherein...

[0175] It also includes a magnetic field applying unit, which pre-applies a magnetic field to the wire rope to adjust the magnitude and direction of the magnetic field of the wire rope, which is a magnetic body.

[0176] The excitation unit is configured to apply a magnetic field generated by the flow of alternating current to the wire rope.

[0177] (Project 12)

[0178] A wire rope inspection system, comprising:

[0179] A wire rope inspection device comprising multiple detection coils that move relative to each other along the direction of the wire rope's extension and detect the magnetic flux of the wire rope; and

[0180] The processing device acquires and processes the detection signals detected by the plurality of detection coils.

[0181] The plurality of detection coils includes a first detection coil and a second detection coil. The first detection coil is arranged along the circumference of the steel wire rope, and the second detection coil is also arranged along the circumference of the steel wire rope. The second detection coil is configured to be tilted relative to the first detection coil when viewed from a direction orthogonal to a first direction in which the first detection coil moves relative to the steel wire rope.

[0182] The processing device is configured to: acquire the abnormal position of the wire rope in the first direction based on the detection signal detected by the first detection coil, and acquire the region of the abnormal position of the wire rope within the cross section at the acquired abnormal position of the wire rope in the first direction based on the detection signal detected by the second detection coil.

[0183] Explanation of reference numerals in the attached figures

[0184] 10: Excitation coil (excitation part); 20: Detection coil; 30, 530: First detection coil; 40, 540: Second detection coil; 50, 550: Third detection coil; 61: Processing part; 71, 72: Magnetic field application part; 100: Wire rope inspection device; 200: Processing device; 300: Wire rope inspection system; 400: Wire rope inspection system; 402: Processing part; 410: Wire rope inspection device; 420: Processing device; 531, 541, 551: Coils (first part); 532, 542, 552: Coils (second part); W: Wire rope.

Claims

1. A wire rope inspection device, comprising: Multiple detection coils, which move relative to each other along the direction of the steel wire rope, and detect the magnetic flux of the steel wire rope; and The processing unit acquires and processes the detection signal corresponding to the magnetic flux of the wire rope detected by the plurality of detection coils. wherein The plurality of detection coils includes a first detection coil and a second detection coil. The first detection coil is arranged along the circumference of the wire rope, and the second detection coil is also arranged along the circumference of the wire rope. The second detection coil is configured to be tilted relative to the first detection coil when viewed from a direction orthogonal to a first direction in which the first detection coil moves relative to the wire rope. The processing unit is configured to: acquire the abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the first detection coil; and acquire the region of the abnormal position of the wire rope within a cross-section at the acquired abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the second detection coil. The wire rope inspection device also includes a display unit that displays abnormal locations within the cross-section of the wire rope.

2. A wire rope inspection device, comprising: Multiple detection coils, which move relative to each other along the direction of the steel wire rope, and detect the magnetic flux of the steel wire rope; and The processing unit acquires and processes the detection signal corresponding to the magnetic flux of the wire rope detected by the plurality of detection coils. wherein The plurality of detection coils includes a first detection coil and a second detection coil. The first detection coil is arranged along the circumference of the wire rope, and the second detection coil is also arranged along the circumference of the wire rope. The second detection coil is configured to be tilted relative to the first detection coil when viewed from a direction orthogonal to a first direction in which the first detection coil moves relative to the wire rope. The processing unit is configured to: acquire the abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the first detection coil; and acquire the region of the abnormal position of the wire rope within a cross-section at the acquired abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the second detection coil. The first detection coil is configured to detect a detection signal having a peak corresponding to the detection position of the wire rope in the first direction. The second detection coil is configured to detect a detection signal having a peak corresponding to a region including multiple detection positions of the wire rope in a direction intersecting the first direction. The processing unit is configured to: obtain the abnormal position of the wire rope in the first direction based on the detection time of the peak of the detection signal detected by the first detection coil, and obtain the abnormal position of the wire rope in the cross section at the obtained abnormal position of the wire rope in the first direction based on the detection time of the peak of the detection signal detected by the second detection coil.

3. The wire rope inspection device according to claim 2, wherein, The processing unit is configured to: obtain the abnormal position of the wire rope in the cross section at the obtained abnormal position of the wire rope in the first direction based on the magnitude of the deviation between the detection time of the peak of the detection signal detected by the second detection coil and the detection time of the peak of the detection signal detected by the first detection coil.

4. A wire rope inspection device, comprising: Multiple detection coils, which move relative to each other along the direction of the steel wire rope, and detect the magnetic flux of the steel wire rope; and The processing unit acquires and processes the detection signal corresponding to the magnetic flux of the wire rope detected by the plurality of detection coils. wherein The plurality of detection coils includes a first detection coil and a second detection coil. The first detection coil is arranged along the circumference of the wire rope, and the second detection coil is also arranged along the circumference of the wire rope. The second detection coil is configured to be tilted relative to the first detection coil when viewed from a direction orthogonal to a first direction in which the first detection coil moves relative to the wire rope. The processing unit is configured to: acquire the abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the first detection coil; and acquire the region of the abnormal position of the wire rope within a cross-section at the acquired abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the second detection coil. The second detection coil is configured to be tilted relative to the first detection coil when viewed from the X direction, which is the second direction and is orthogonal to the Z direction, which is the first direction. The plurality of detection coils also includes a third detection coil, which is arranged circumferentially along the wire rope and configured to be tilted relative to the first detection coil when viewed from the Y direction, a third direction orthogonal to the Z and X directions. The processing unit is configured to: obtain the abnormal position of the wire rope in the Z direction based on the detection signal detected by the first detection coil, and obtain the abnormal position of the wire rope in the cross section at the obtained abnormal position of the wire rope in the first direction based on the detection signals detected by the second detection coil and the third detection coil.

5. The wire rope inspection device according to claim 4, wherein, The second detection coil is configured to be tilted relative to the first and third detection coils when viewed from the X direction. The third detection coil is configured to be tilted relative to the first and second detection coils when viewed from the Y direction.

6. The wire rope inspection device according to claim 5, wherein, The first detection coil is configured to detect a detection signal having a peak corresponding to the detection position of the steel wire rope in the Z direction. The second detection coil is configured to detect a detection signal having peaks corresponding to a region including multiple detection positions of the wire rope in the Y direction. The third detection coil is configured to detect a detection signal having peaks corresponding to a region including multiple detection positions of the wire rope in the X direction. The processing unit is configured to: obtain the position of the abnormal position of the wire rope in the Z direction based on the detection time of the peak of the detection signal detected by the first detection coil; obtain the position of the abnormal position of the wire rope in the Y direction within the cross section at the obtained abnormal position of the wire rope in the Z direction based on the detection time of the peak of the detection signal detected by the second detection coil; and obtain the position of the abnormal position of the wire rope in the X direction within the cross section at the obtained abnormal position of the wire rope in the Z direction based on the detection time of the peak of the detection signal detected by the third detection coil.

7. The wire rope inspection device according to claim 4, wherein, Multiple steel wire ropes are provided. The processing unit is configured to: obtain the abnormal position in the direction intersecting the Z direction within the cross section of each of the multiple steel wire ropes based on the peak of the detection signal detected by the first detection coil, the second detection coil and the third detection coil respectively.

8. The wire rope inspection device according to claim 7, wherein, Each of the plurality of steel wire ropes is provided with a first detection coil, a second detection coil, and a third detection coil.

9. The wire rope inspection device according to claim 8, wherein, The first detection coil, the second detection coil, and the third detection coil each include a first part and a second part, wherein the first part is disposed in a direction orthogonal to the Z direction, and the second part is disposed on the side opposite to the side where the first part is disposed, together with the first part, to clamp the wire rope in the middle.

10. The wire rope inspection device according to any one of claims 1 to 9, wherein, It also includes an excitation unit that moves relative to the wire rope and applies magnetic flux to the wire rope. The excitation unit is shared by the multiple detection coils.

11. The wire rope inspection device according to claim 10, wherein, It also includes a magnetic field applying unit, which pre-applies a magnetic field to the wire rope to adjust the magnitude and direction of the magnetic field of the wire rope, which is a magnetic body. The excitation unit is configured to apply a magnetic field generated by the flow of alternating current to the wire rope.

12. A wire rope inspection system, comprising: A wire rope inspection device comprising multiple detection coils that move relative to each other along the direction of the wire rope's extension and detect the magnetic flux of the wire rope; and The processing device acquires and processes detection signals corresponding to the magnetic flux of the wire rope detected by the plurality of detection coils. wherein The plurality of detection coils includes a first detection coil and a second detection coil. The first detection coil is arranged along the circumference of the wire rope, and the second detection coil is also arranged along the circumference of the wire rope. The second detection coil is configured to be tilted relative to the first detection coil when viewed from a direction orthogonal to a first direction in which the first detection coil moves relative to the wire rope. The processing device is configured to: acquire the abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the first detection coil; and acquire the region of the abnormal position of the wire rope within a cross-section at the acquired abnormal position of the wire rope in the first direction based on a detection signal corresponding to the magnetic flux of the wire rope detected by the second detection coil. The wire rope inspection device also includes a display unit that displays abnormal locations within the cross-section of the wire rope.

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