Wiring metal fitting quality determination device, wiring metal fitting quality determination system, and program

Abstract

To more accurately detect an abnormality of a wiring metal fitting in wirings provided in parallel or wirings provided crossing with each other.SOLUTION: A wiring metal fitting quality determination device (image processing device 30) includes: an acquisition part (control part 31) that acquires a plurality of wiring images captured by a plurality of imaging parts 21a, 21b at an angle of looking up at a plurality of wirings so as to sandwich the wirings from right and left two directions; a detection part (control part 31) that detects a wiring metal fitting equipped in the wirings from the wiring images; and a determination part (control part 31) that determines quality of the detected wiring metal fitting. When a plurality of wiring metal fittings of the same type are detected in a vertical direction, the determination part sets only the wiring metal fitting located in the upper side as a determination target.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wire fitting quality determination device, a wire fitting quality determination system, and a program. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a system has been known in which a camera is mounted on a railway vehicle, an area including overhead wires is captured while the vehicle is traveling, and the quality of the overhead wire fittings is determined from the captured image data.

[0003] For example, Patent Document 1 describes an overhead wire fitting anomaly detection device that includes a camera mounted on the roof of a vehicle, a learning processing unit that uses one-hot expression index image data converted from image data output from the camera to learn an anomaly detection model through semi-supervised anomaly detection learning, and a data processing unit that determines anomalies using the anomaly detection model. Patent Document 2 also describes an overhead line fitting detection device that detects overhead line fittings from two line sensor images, and that is configured to include two line sensor cameras that capture images of overhead lines and overhead line equipment on either side, a pre-processing unit that performs learning for an artificial intelligence function, a line sensor image creation unit that creates two line sensor images from image signals input from the two line sensor cameras while the vehicle is traveling, a fitting candidate detection unit that detects overhead line fitting candidates from the two line sensor images, a fitting candidate image cut-out unit that creates cut-out images of overhead line fitting candidates from the line sensor images based on the overhead line fitting candidates, and a fitting determination unit that inputs the cut-out images into the artificial intelligence function to identify the overhead line fittings. All of these are based on the assumption that the overhead line will be a simple catenary type. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-75660 [Patent Document 2] Japanese Patent Application Publication No. 2020-149286 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, there is a type of overhead line system called the twin simple catenary system, in which two sets of simple catenary overhead lines are arranged side by side. When photographing twin simple catenary type overhead wires or simple catenary type overhead wires in locations where they are installed parallel or crossing each other from below at an angle, the overhead wire fittings at the back are partially hidden by the overhead wires in the foreground, making it impossible to accurately detect the overhead wire fittings from the captured image data. As a result, it has been difficult to accurately detect abnormalities in the overhead wire fittings.

[0006] An object of the present invention is to provide a catenary fitting quality determination device, catenary fitting quality determination system, and program that can more accurately detect abnormalities in catenary fittings on overhead wires that are installed in parallel or at crossings. [Means for solving the problem]

[0007] In order to solve the above problem, the overhead line fitting quality determination device according to claim 1 is an acquisition unit that acquires a plurality of overhead line images taken by a plurality of imaging units at an angle that looks up at the plurality of overhead line images from both left and right directions; a detection unit that detects overhead line fittings attached to the overhead line from the overhead line image; a determination unit that determines whether the detected overhead line fitting is good or bad, When a plurality of the same type of overhead line fittings are detected in the vertical direction, the determination unit determines only the upper overhead line fitting.

[0008] The invention described in claim 2 is the overhead line fitting quality determination device described in claim 1, The overhead line fitting includes a hanger, When determining whether the hanger is floating, the determination unit determines only the hanger located at the top.

[0009] The invention described in claim 3 is the overhead line fitting quality determination device described in claim 1, A left-side determination criterion when photographed from the left side and a right-side determination criterion when photographed from the right side are provided, The judgment unit judges the quality of the overhead line fittings using the left-side judgment criteria for an overhead line image taken from the left side, and judges the quality of the overhead line fittings using the right-side judgment criteria for an overhead line image taken from the right side.

[0010] The invention described in claim 4 is the overhead line fitting quality determination device described in claim 3, The overhead line fittings include asymmetric fittings with different shapes on the left and right, For the asymmetric fitting, the left side determination criterion and the right side determination criterion are provided, The judgment unit judges the quality of the asymmetrical fittings using left-side judgment criteria for overhead line images taken from the left side, and judges the quality of the asymmetrical fittings using right-side judgment criteria for overhead line images taken from the right side.

[0011] The invention described in claim 5 is the overhead line fitting quality determination device described in claim 1, The overhead wire image is an image taken by the imaging unit provided on the railway vehicle while the vehicle is running.

[0012] The overhead line fitting quality determination system according to claim 6 comprises: A plurality of imaging units that photograph the plurality of overhead wires from two angles looking up at them from both left and right directions; an acquisition unit that acquires a plurality of overhead line images captured by the plurality of imaging units; a detection unit that detects overhead line fittings attached to the overhead line from the overhead line image; a determination unit that determines whether the detected overhead line fitting is good or bad, When a plurality of the same type of overhead line fittings are detected in the vertical direction, the determination unit determines only the upper overhead line fitting.

[0013] The program according to claim 7 comprises: The computer of the overhead line fittings quality judgment device, an acquisition unit that acquires a plurality of overhead line images taken from two directions, left and right, looking up at the plurality of overhead line images in such a way that the plurality of overhead line images are sandwiched between them; a detection unit that detects overhead line fittings attached to the overhead line from the overhead line image; a determining unit that determines whether the detected overhead line metal fitting is good or bad, When a plurality of the same type of overhead line fittings are detected in the vertical direction, the determination unit determines only the upper overhead line fitting. [Effects of the Invention]

[0014] According to the present invention, abnormalities in overhead wire fittings in overhead wires that are installed in parallel or that are installed in a crossing manner can be detected more accurately. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a diagram showing a schematic configuration of an overhead line fitting quality determination system according to an embodiment of the present invention; [Figure 2] FIG. 2 is a diagram showing the installation position of the overhead line. [Figure 3] FIG. [Figure 4] 10 is a flowchart showing the flow of a quality determination process. [Figure 5A] 10A and 10B are diagrams showing examples of overhead wires and overhead wire fittings photographed by the imaging unit on the left side. [Figure 5B] FIG. 1 is an enlarged view of area A1. [Figure 5C] FIG. 1 is an enlarged view of area A2. [Figure 5D] FIG. 1 is an enlarged view of area A3. [Figure 6A] 10A and 10B are diagrams showing examples of overhead wires and overhead wire fittings photographed by the imaging unit on the right side. [Figure 6B] FIG. 1 is an enlarged view of area B1. [Figure 6C] FIG. 1 is an enlarged view of area B2. [Figure 6D] FIG. 1 is an enlarged view of area B3. DETAILED DESCRIPTION OF THE INVENTION

[0016] An overhead wiring fitting quality determination system (hereinafter also referred to as system 100) according to an embodiment of the present invention will be described below with reference to Figures 1 to 6. However, the technical scope of the present invention is not limited to the illustrated examples.

[0017] [1. System configuration] 1 is a diagram showing a schematic configuration of an overhead wiring fitting quality determination system (system 100) according to this embodiment. The system 100 is installed on a vehicle 20 that runs on a rail R shown in FIG. In this embodiment, the overhead wire 10 installed above the rail R is a twin simple catenary type in which two sets of simple catenary type overhead wires are arranged side by side on the left and right. As shown in Fig. 2, the overhead wire 10 includes a plurality of catenary wires 11a, 11b and a plurality of trolley wires 12a, 12b. The trolley wire 12a is suspended from the catenary wire 11a by a hanger 13a. The trolley wire 12b is suspended from the catenary wire 11b by a hanger 13b. A plurality of hangers 13a, 13b are installed at predetermined intervals. The system 100 judges whether the overhead wire fittings including the hangers 13a and 13b are good or bad. The overhead line 10 may be a plurality of overhead lines arranged in parallel in a simple catenary system, or a plurality of overhead lines arranged in a crossing manner.

[0018] As shown in FIG. 1, the system 100 includes imaging units 21a and 21b installed on the roof of a vehicle 20, and an image processing device 30 (overhead wiring fitting quality determination device) installed inside the vehicle 20.

[0019] The imaging units 21a and 21b are installed on the roof of the vehicle 20, spaced apart in the vehicle width direction (Y-axis direction). The installation angles and elevation angles of the imaging units 21a and 21b are set so that their optical axes are perpendicular to the traveling direction (X-axis direction) of the vehicle 20 and so that at least the catenary wires 11a and 11b, the pair of hangers 13a and 13b, and the trolley wires 12a and 12b are included in their fields of view. That is, the imaging units 21a and 21b are installed so as to capture images of the catenary wires 11a and 11b and the trolley wires 12a and 12b from an angle looking up at them from both left and right. In FIG. 1, the positive direction of the Y-axis is the leftward direction, and the negative direction of the Y-axis is the rightward direction. The line VA shown in FIG. 1 is the imaging line captured by the imaging unit 21a. The line VB shown in FIG. 1 is the imaging line captured by the imaging unit 21b. The imaging units 21a and 21b are line sensor cameras, and are imaging devices capable of repeatedly capturing images of a linear imaging area. The imaging units 21a and 21b are installed so that the linear imaging area intersects with the direction of movement of the imaging target, and by continuously capturing images while the imaging target is moving, two-dimensional images of the imaging target can be obtained. The imaging units 21a and 21b output the captured image signals to the image processing device 30.

[0020] The image processing device 30 includes a control unit 31 and a storage unit 32 . The control unit 31 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and controls each part of the image processing device 30 in cooperation with the CPU and program data stored in the memory unit 32.

[0021] The storage unit 32 includes a hard disk drive (HDD), a semiconductor memory, etc., and stores various information required for operating the image processing device 30, such as program data, in a manner that allows the control unit 31 to read and write the information. The storage unit 32 also stores an object detection model and a pass / fail determination model. The object detection model is a machine learning model for detecting overhead line fittings, which will be described in detail later, from images captured by the imaging units 21a and 21b. The pass / fail judgment model is a machine learning model for judging the pass / fail of the overhead line fittings detected by the object detection model (judging whether the overhead line fittings are normal or abnormal). The pass / fail judgment model includes a left-side judgment criterion and a right-side judgment criterion. The left-side judgment criterion is a criterion for judging the pass / fail of the overhead line fittings in an image taken from the left side (an image taken by the imaging unit 21a). The right-side judgment criterion is a criterion for judging the pass / fail of the overhead line fittings in an image taken from the right side (an image taken by the imaging unit 21b).

[0022] [2. Explanation of overhead wiring fittings] FIG. 3 shows the overhead wire 10 and the overhead wire fittings including hangers 13a and 13b. The hanger 13a includes a band-shaped hanger bar 131a that is hung on the catenary wire 11a at its end in the positive direction of the Z axis, and a hanger ear 132a that is attached to the end of the hanger bar 131a in the negative direction of the Z axis. The hanger ear 132a includes an ear body 1321a and a lever 1322a. The ear body 1321a is substantially C-shaped. The ear body 1321a is fitted into an ear groove of the trolley wire 12a and grips the upper part of the trolley wire 12a. A separation portion 14a, which is a separated portion of the substantially C-shaped ear body 1321a, is located on the negative side of the Z axis. Therefore, the lower part of the trolley wire 12a is exposed, allowing the pantograph to slide against it. Hanger 13a further includes protective cover 133a through which messenger wire 11a is inserted at the center and which protects messenger wire 11a and the end of hanger bar 131a in the positive direction of the Z axis. The hanger 13b includes a band-shaped hanger bar 131b that is hung on the messenger wire 11b at its end in the positive direction of the Z axis, and a hanger ear 132b that is attached to the end of the hanger bar 131b in the negative direction of the Z axis. The hanger ear 132b includes an ear body 1321b and a lever 1322b. The ear body 1321b is approximately C-shaped. The ear body 1321b is fitted into an ear groove of the trolley wire 12b and grips the upper part of the trolley wire 12b. A separation portion 14b, which is a separated portion of the approximately C-shaped ear body 1321b, is located on the negative side of the Z axis. Therefore, the lower part of the trolley wire 12b is exposed, allowing the pantograph to slide against it. Hanger 13b further includes protective cover 133b through which messenger wire 11b is inserted at the center, and which protects messenger wire 11b and the end of hanger bar 131b in the positive direction of the Z axis. As described above, the hanger ears 132a and 132b may be asymmetrical metal fittings having different shapes on the left and right (Y-axis direction). In the case of non-target fittings, the shape differs between the image taken from the left side (image taken by imaging unit 21a) and the image taken from the right side (image taken by imaging unit 21b), so by providing separate left-side and right-side judgment criteria, it is possible to more accurately determine whether the overhead line fittings are good or bad. The protective covers 133a and 133b are made of an insulating material.

[0023] [3. Explanation of system operation] Next, the operation of the system 100 according to this embodiment will be described. FIG. 4 is a flowchart showing the pass / fail determination process executed by the control unit 31 of the image processing device 30.

[0024] (Good / bad judgment process) The control unit 31 generates an overhead line image including the overhead line 10 by arranging in chronological order images continuously captured by the imaging unit 21a while the vehicle 20 is traveling. In this way, the control unit 31 acquires an overhead line image captured from the left side. Furthermore, the control unit 31 generates an overhead line image including the overhead line 10 by arranging in chronological order images continuously captured by the imaging unit 21b while the vehicle 20 is traveling. In this way, the control unit 31 acquires an overhead line image captured from the right side (step S1). In other words, the control unit 31 acquires multiple overhead line images captured by the multiple imaging units 21a, 21b at an angle looking up at the multiple overhead lines (messenger wires 11a, 11b, trolley wires 12a, 12b) from both left and right directions. The control unit 31 functions as an acquisition unit. Next, the control unit 31 inputs any of the overhead line images acquired in step S1 into an object detection model, thereby detecting overhead line fittings attached to the overhead line from the overhead line image (step S2). The control unit 31 functions as a detection unit.

[0025] 5A shows an example of an overhead line image generated from an image captured by the imaging unit 21a. In the example shown in FIG. 5A, hanger 13a is located on the near side, and hanger 13b is located on the far side. Hanger bar 131b and protective cover 133b located on the far side are partially hidden by hanger bar 131a located on the near side. Fig. 5B shows an enlarged view of area A1 shown in Fig. 5A. As shown in Fig. 5B, the overhead line image generated from the image captured by imaging unit 21a includes separation portion 14b between ear main body 1321b and lever 1322b in the Z-axis direction. 6A shows an example of an overhead line image generated from an image captured by the imaging unit 21b. In the example shown in FIG. 6A, hanger 13b is located on the near side, and hanger 13a is located on the far side. Hanger bar 131a and protective cover 133a located on the far side are partially hidden by hanger bar 131b located on the near side. Fig. 6B shows an enlarged view of area B1 shown in Fig. 6A. As shown in Fig. 5B, the overhead line image generated from the image captured by imaging unit 21b includes separation portion 14a between ear main body 1321a and lever 1322a in the Z-axis direction.

[0026] Next, the control unit 31 determines whether or not there are multiple overhead metal fittings of the same type detected in step S2 in the vertical direction. That is, the control unit 31 determines whether or not multiple overhead metal fittings of the same type have been detected in the vertical direction (step S3). The overhead metal fittings of the same type are hangers 13a and 13b. The overhead metal fitting located on the upper side is the overhead metal fitting located on the front side in the overhead metal fitting image. The lower overhead metal fitting is the overhead metal fitting located on the back side in the overhead metal fitting image.

[0027] If multiple overhead line fittings of the same type are detected in the vertical direction (step S3; YES), the control unit 31 determines that only the overhead line fittings located on the upper side (front side) of the overhead line fittings detected in step S2 will be subject to quality judgment (step S4). Here, a case where the hangers 13a, 13b are judged to be floating as a quality determination of the overhead wiring fittings will be described. FIG. 5C shows an enlarged view of region A2 shown in FIG. 5A. The judgment of the hanger 13a being floating is a judgment of whether the distance W1a between the Z-axis positive direction end 131aa of the hanger bar 131a and the Z-axis positive direction end (top end) of the messenger wire 11a is equal to or greater than a predetermined threshold. If the distance W1a is equal to or greater than the predetermined threshold, the hanger 13a is judged to be floating. FIG. 6C shows an enlarged view of region B2 shown in FIG. 6A. The judgment of the hanger 13b being floating is a judgment of whether the distance W1b between the Z-axis positive direction end 131ba of the hanger bar 131b and the Z-axis positive direction end (top end) of the messenger wire 11b is equal to or greater than a predetermined threshold. If the distance W1b is equal to or greater than the predetermined threshold, the hanger 13b is judged to be floating. In this case, in step S4, the control unit 31 determines that only the hanger located on the upper side (the front side) is to be subjected to the pass / fail judgment. In the example shown in Fig. 5A, the control unit 31 determines that the hanger 13a located on the front side is to be subjected to the pass / fail judgment, but does not determine that the hanger 13b located on the back side is to be subjected to the pass / fail judgment. Also, in the example shown in Fig. 6A, the control unit 31 determines that the hanger 13b located on the front side is to be subjected to the pass / fail judgment, but does not determine that the hanger 13a located on the back side is to be subjected to the pass / fail judgment.

[0028] 5D is an enlarged view of region A3 shown in FIG. 5A. In the example shown in FIG. 5D, if the hanger bar of hanger 13b located at the back is erroneously recognized as hanger bar 131a instead of hanger bar 131b, it is determined that the distance W1b between the end of the hanger bar in the positive Z-axis direction and the end (upper end) of messenger wire 11b in the positive Z-axis direction is equal to or greater than a predetermined threshold. In other words, it is erroneously determined that hanger 13b is floating. However, by not including hanger 13b located at the back as a target for quality determination, this erroneous determination can be prevented.

[0029] Fig. 6D shows an enlarged view of region B3 shown in Fig. 6A. In the example shown in Fig. 6D, if the hanger bar of hanger 13a located at the back is erroneously recognized as hanger bar 131b instead of hanger bar 131a, it is determined that the distance W1a between the end of the hanger bar in the positive Z-axis direction and the end (upper end) of messenger wire 11a in the positive Z-axis direction is equal to or greater than a predetermined threshold. In other words, it is erroneously determined that hanger 13a is floating. However, by not including hanger 13a located at the back as a target for quality determination, this erroneous determination can be prevented.

[0030] On the other hand, if multiple overhead metal fittings of the same type are not detected in the vertical direction (step S3; NO), the control unit 31 determines the overhead metal fitting detected in step S2 as the object of quality determination (step S5).

[0031] Next, the control unit 31 judges whether the overhead wiring fitting to be judged determined in step S4 or S5 is good or bad (step S6). The control unit 31 functions as a judgement unit. In step S6, the control unit 31 inputs an image of the overhead metal fitting to be judged as a judgment model, thereby judging whether the overhead metal fitting to be judged is good or bad. A case will be described in which the floating of hangers 13a, 13b is determined to determine the quality of the overhead wiring fittings. In this case, in the example shown in FIG. 5A, the control unit 31 determines the quality of the hanger 13a located on the front side. On the other hand, it does not determine the quality of the hanger 13b located on the back side. Also, in the example shown in FIG. 6A, the control unit 31 determines the quality of the hanger 13b located on the front side. On the other hand, it does not determine the quality of the hanger 13a located on the back side. In step S6, the control unit 31 may extract the distance W1a from the overhead line image, and determine that the hanger 13a is floating if the distance W1a is equal to or greater than a predetermined threshold. Alternatively, the control unit 31 may extract the distance W1b from the overhead line image, and determine that the hanger 13b is floating if the distance W1b is equal to or greater than a predetermined threshold.

[0032] Next, a case will be described in which the quality of the overhead line fittings is determined in step S6 by determining the quality of the hanger ears 132a and 132b. In this case, the control unit 31 determines the quality of the overhead line fitting based on the left-side determination criteria for the hanger ear 132a detected from the overhead line image taken from the left side. On the other hand, the control unit 31 determines the quality of the overhead line fitting based on the right-side determination criteria for the hanger ear 132b detected from the overhead line image taken from the right side.

[0033] Next, the control unit 31 determines whether or not the quality of the overhead wire fittings has been determined for all the overhead wire images acquired in step S1 (step S7). If there is an overhead line image for which the quality of the overhead line fittings has not been determined (step S7; NO), the control unit 31 transitions the quality determination process to step S2 and detects the overhead line fittings from the overhead line image for which the quality of the overhead line fittings has not been determined. On the other hand, if the quality determination of the overhead wire fittings has been performed for all the overhead wire images (step S7; YES), the control unit 31 ends the quality determination process.

[0034] In step S4 of the pass / fail judgment process, the control unit 31 determines that only the hanger located on the upper side (near side) is the object of pass / fail judgment, but since there is no overlap with the hanger located on the lower side (rear side), the hanger located on the lower side (rear side) may also be the object of pass / fail judgment.

[0035] [4. Explanation of effects] The overhead line fitting quality determination device (image processing device 30) according to this embodiment includes an acquisition unit (control unit 31) that acquires multiple overhead line images taken by multiple image capture units 21a, 21b at an angle looking up at the multiple overhead lines from both left and right, a detection unit (control unit 31) that detects overhead line fittings attached to the overhead line from the overhead line images, and a determination unit (control unit 31) that determines the quality of the detected overhead line fittings. When multiple overhead line fittings of the same type are detected in the vertical direction, the determination unit only targets the uppermost overhead line fitting for determination. Therefore, only the overhead metal fittings on the front side in the overhead wire image can be subject to judgment, and the overhead metal fittings on the back side can be excluded, which allows for more accurate detection of abnormalities in overhead wire fittings on parallel or intersecting overhead wires where the overhead metal fittings are hidden by the front metal fittings.

[0036] In the overhead wiring fitting quality determination device (image processing device 30) according to this embodiment, the overhead wiring fittings include hangers 13a and 13b. When determining whether a hanger is floating, the determination unit (control unit 31) only determines the hanger located at the top. Therefore, it is possible to determine only the hangers at the front side of the overhead wire image, without determining the hangers at the back side, which allows for more accurate detection of hanger abnormalities in overhead wires that are installed parallel to each other or that are installed crossing each other.

[0037] The overhead line fittings quality determination device (image processing device 30) according to this embodiment has a left-side determination standard when photographed from the left side and a right-side determination standard when photographed from the right side. The determination unit (control unit 31) determines the quality of the overhead line fittings for overhead line images photographed from the left side according to the left-side determination standard, and determines the quality of the overhead line fittings for overhead line images photographed from the right side according to the right-side determination standard. Therefore, it is possible to more accurately detect abnormalities in the overhead line fittings by using the overhead line image taken from the left side and the overhead line image taken from the right side.

[0038] In the overhead line fitting quality determination device (image processing device 30) according to this embodiment, the overhead line fittings include asymmetrical fittings (hanger ears 132a, 132b) with different shapes on the left and right. For asymmetrical fittings, left-side and right-side determination criteria are provided. The determination unit (control unit 31) determines the quality of asymmetrical fittings based on the left-side determination criteria for overhead line images captured from the left side, and determines the quality of asymmetrical fittings based on the right-side determination criteria for overhead line images captured from the right side. Therefore, abnormalities in asymmetric metal fittings can be detected more accurately using overhead line images taken from the left side and overhead line images taken from the right side.

[0039] In the overhead line fitting quality determination device (image processing device 30) according to this embodiment, overhead line images are images taken by imaging units 21a and 21b provided on the railway vehicle (vehicle 20) while the vehicle is running. Therefore, it is possible to easily capture images of overhead wires over a wide range.

[0040] The embodiments to which the present invention can be applied are not limited to those described above, and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, the control unit 31 of the image processing device 30 functions as an "acquisition unit," a "detection unit," and a "determination unit," but this is not limited to this. An external device that is installed outside the vehicle 20 and communicably connected to the image processing device 30 may function as the "acquisition unit," the "detection unit," and the "determination unit." In this case, the external device stores the object detection model and the determination model in its own memory. [Explanation of symbols]

[0041] 100 System (Overhead Wire Fittings Quality Judgment System) 10. Overhead Lines 11a, 11b Messenger wire 12a, 12b Contact wire 13a, 13b Hanger (overhead wire fittings) 131a, 131b Hanger bar 132a, 132b Hangair 1321a, 1321b Ear body 1322a,1322b Lever 133a, 133b Protective cover 14a,14b Separation part 20 vehicles 21a, 21b Imaging unit 30 Image processing device (overhead wire fitting quality determination device) 31 Control unit (acquisition unit, detection unit, determination unit) 32 Storage section

Claims

1. an acquisition unit that acquires a plurality of overhead line images taken by a plurality of imaging units at an angle that looks up at the plurality of overhead line images from both left and right directions; a detection unit that detects overhead line fittings attached to the overhead line from the overhead line image; a determination unit that determines whether the detected overhead line fitting is good or bad, When a plurality of the same type of overhead line fittings are detected in the vertical direction, the determination unit is a quality determination device that determines only the uppermost overhead line fitting.

2. The overhead line fitting includes a hanger, 2. The overhead wiring fitting quality determining device according to claim 1, wherein the determining unit determines whether the hanger is floating only with respect to the hanger positioned at the upper side.

3. A left-side determination criterion when photographed from the left side and a right-side determination criterion when photographed from the right side are provided, 2. The overhead line fitting quality determination device according to claim 1, wherein the determination unit determines the quality of the overhead line fittings using the left-side determination criterion for an overhead line image taken from the left side, and determines the quality of the overhead line fittings using the right-side determination criterion for an overhead line image taken from the right side.

4. The overhead line fittings include asymmetric fittings with different shapes on the left and right, For the asymmetric fitting, the left side determination criterion and the right side determination criterion are provided, 4. The overhead line fitting quality judgment device according to claim 3, wherein the judgment unit judges the quality of the asymmetric fittings based on left-side judgment criteria for overhead line images taken from the left side, and judges the quality of the asymmetric fittings based on right-side judgment criteria for overhead line images taken from the right side.

5. 2. The overhead line fitting quality determination device according to claim 1, wherein the overhead line image is an image taken by the imaging unit provided on the railway vehicle while the vehicle is running.

6. A plurality of imaging units that photograph the plurality of overhead wires from two angles looking up at them from both left and right directions; an acquisition unit that acquires a plurality of overhead line images captured by the plurality of imaging units; a detection unit that detects overhead line fittings attached to the overhead line from the overhead line image; a determination unit that determines whether the detected overhead line fitting is good or bad, The system for determining whether an overhead line fitting is good or bad is configured such that, when a plurality of the same type of overhead line fittings are detected in the vertical direction, the determination unit determines only the uppermost overhead line fitting.

7. The computer of the overhead line fittings quality judgment device, an acquisition unit that acquires a plurality of overhead line images taken from two directions, left and right, looking up at the plurality of overhead line images in such a way that the plurality of overhead line images are sandwiched between them; a detection unit that detects overhead line fittings attached to the overhead line from the overhead line image; a determining unit that determines whether the detected overhead line metal fitting is good or bad, The determination unit is a program that, when a plurality of the same type of overhead line fittings are detected in the vertical direction, determines only the overhead line fitting located at the top.

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