Wire harness inspection device, wire harness inspection system, and wire harness inspection method

Abstract

To provide a wire harness inspection device which can appropriately determine whether an exterior device is mounted or not with a simple configuration.SOLUTION: A wire harness inspection device comprises an image data acquisition unit 111 that acquires image data. The image data includes: a wire harness; a jig plate; and a light-up part that lights up when an exterior component is mounted. The wire harness inspection device further comprises a manufacture drawing data acquisition unit 112 that acquires manufacture drawing reference data including mount position information in which the exterior component is mounted on the wire harness. The wire harness inspection device comprises a data comparison unit 114 that compares the image data in the mount position information on the basis of the image data and the manufacture drawing reference data. Further, the wire harness inspection device comprises: a light-up determination unit 115 that determines whether the light-up part lights up or not on the basis of a comparison result of the data comparison unit; and an inspection result display unit 116 that displays a result of the light-up determination unit.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a wire harness inspection device, a wire harness inspection system, and a wire harness inspection method. [Background technology]

[0002] Conventionally, devices have been proposed that inspect whether exterior parts such as clips and earth terminals attached to wire harnesses are properly attached. Patent Document 1 discloses an appearance inspection device for performing appearance inspection of wire harnesses in a short time with a certain degree of accuracy. The appearance inspection device disclosed in Patent Document 1 captures two-dimensional images of an assembly drawing board on which a wire harness is arranged, and also performs three-dimensional measurements of the assembly drawing board by a light-section method, and performs appearance inspection of the wire harness based on the obtained information. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-90401 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the appearance inspection device disclosed in Patent Document 1, pattern matching is performed between a reference image and a two-dimensional image, and if the degree of match of this pattern matching is higher than a predetermined degree of match, the appearance pass / fail judgment is made. In other words, in this appearance inspection device, even if an exterior part such as a clip is not attached, if the degree of match of the pattern matching exceeds a predetermined degree of match, the appearance pass is made, and there are cases in which the desired judgment result cannot be obtained.

[0005] The present invention has been made in consideration of the problems inherent in the conventional techniques, and an object of the present invention is to provide a wire harness inspection device that is simply configured and is capable of appropriately determining whether or not an exterior device is attached. [Means for solving the problem]

[0006] A wire harness inspection device according to an embodiment of the present invention is a wire harness inspection device that inspects whether or not an exterior part is attached to a wire harness, and includes: an image data acquisition unit that acquires image data captured by an imaging device, the image data including a wire harness, a fixture plate on which the wire harness is mounted, and an inspection jig that is provided on the fixture plate and has a lighting unit that lights up when an exterior part of the wire harness is attached; an image data acquisition unit that acquires manufacturing drawing reference data that is drawing data of the wire harness and includes mounting position information where the exterior part is attached to the wire harness; a data comparison unit that compares image data in the mounting position information based on the image data and the manufacturing drawing reference data; a lighting determination unit that determines whether or not the lighting unit is lit based on a comparison result of the data comparison unit; and an inspection result display unit that displays the result of the lighting determination unit.

[0007] A wire harness inspection system according to another aspect of the present invention is a wire harness inspection system that inspects whether or not an exterior part is attached to a wire harness, the system including an inspection jig that is provided on a jig plate on which the wire harness is placed and has a lighting part that lights up when an exterior part to be attached to the wire harness is attached, an imaging device that images the wire harness, a display device that displays an inspection result of inspecting whether or not an exterior part is attached to the wire harness, and a wire harness inspection device. The wire harness inspection device includes an image data acquisition unit that acquires image data including the wire harness, the jig plate, and the inspection jig, the image data being captured by the imaging device, a manufacturing drawing data acquisition unit that acquires manufacturing drawing reference data that is drawing data of the wire harness and includes mounting position information where the exterior part is attached to the wire harness, a data comparison unit that compares image data in the mounting position information based on the image data and the manufacturing drawing reference data, a lighting determination unit that determines whether or not the lighting part is lit based on a comparison result of the data comparison unit, and an inspection result display unit that displays a result of the lighting determination unit.

[0008] A wire harness inspection method according to another aspect of the present invention is a wire harness inspection method executed by a computer for inspecting whether or not an exterior part is attached to a wire harness, the method comprising: acquiring image data including a wire harness, a fixture plate on which the wire harness is mounted, and an inspection jig that is provided on the fixture plate and has a lighting part that lights up when an exterior part of the wire harness is attached, the image data being captured by an imaging device; acquiring manufacturing drawing reference data that is drawing data of the wire harness and includes mounting position information where the exterior part is attached to the wire harness; comparing image data in the mounting position information based on the image data and the manufacturing drawing reference data; determining whether or not the lighting part is lit based on the comparison result; and displaying the determination result of whether or not the lighting part is lit. Effect of the Invention

[0009] According to the present invention, it is possible to provide a wire harness inspection device that has a simple configuration and is capable of appropriately determining whether or not an exterior device is attached. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram showing a configuration of a wire harness inspection system according to a first embodiment. [Diagram 2] 1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Diagram 3] 1 is a diagram showing a configuration of an inspection jig in a wire harness inspection system according to a first embodiment. [Figure 4A] 1 is a schematic diagram showing a circuit configuration of an inspection jig in a wire harness inspection system according to a first embodiment. [Figure 4B] 1 is a schematic diagram showing a circuit configuration of an inspection jig in a wire harness inspection system according to a first embodiment. [Figure 5A] FIG. 2 is a diagram for explaining a schematic diagram of manufacturing drawing reference data in the wire harness inspection system according to the first embodiment. [Figure 5B] FIG. 2 is a diagram for explaining lighting area reference data in the wire harness inspection system according to the first embodiment. [Figure 6A] 1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Figure 6B] 1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Figure 7A] 1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Figure 7B] 1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Figure 8A]1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Figure 8B] 1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Figure 8C] 1 is a diagram for explaining an inspection jig in the wire harness inspection system according to the first embodiment. FIG. [Figure 9] 1 is a block diagram showing a configuration of a wire harness inspection device according to a first embodiment. [Figure 10] 1 is a block diagram showing a functional configuration of a wire harness inspection device according to a first embodiment. [Figure 11A] 2 is a diagram for explaining image data in the wire harness inspection system according to the first embodiment. FIG. [Figure 11B] 2 is a diagram for explaining image data in the wire harness inspection system according to the first embodiment. FIG. [Figure 12] 4 is a flowchart showing an example of a process of the wire harness inspection device according to the first embodiment. [Figure 13A] 13A and 13B are diagrams for explaining a light emission pattern emitted from a lighting unit of the wire harness inspection system according to the second embodiment. [Figure 13B] 13A and 13B are diagrams for explaining a light emission pattern emitted from a lighting unit of the wire harness inspection system according to the second embodiment. [Figure 14] FIG. 13 is a diagram showing a configuration of a wire harness inspection system according to another embodiment. [Figure 15] FIG. 13 is a diagram showing a configuration of a wire harness inspection system according to another embodiment. [Figure 16A] FIG. 11 is a diagram for explaining a wire harness inspection system according to another embodiment. [Figure 16B] FIG. 11 is a diagram for explaining a wire harness inspection system according to another embodiment. [Figure 17]FIG. 11 is a diagram for explaining a wire harness inspection system according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the wire harness inspection system 10 and the wire harness inspection device 100 according to the present embodiment will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for the convenience of explanation and may differ from the actual ratios. In addition, in the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

[0012] (First embodiment) Fig. 1 is a diagram showing a configuration of a wire harness inspection system 10 according to a first embodiment. In the first embodiment, the wire harness inspection system 10 is a system that inspects whether exterior parts of a wire harness 300 (see Fig. 2) arranged on a jig plate 20 are properly attached.

[0013] The wire harness 300 is a wiring member used in various mechanical devices that require a large amount of electrical wiring, such as wiring inside a vehicle, and is a bundle of multiple electric wires used for power supply and signal communication. Exterior parts such as a clip 310 (see FIG. 2) and a connector are attached to the wire harness 300.

[0014] The wire harness inspection system 10 according to the first embodiment includes an imaging device 30 such as a camera, an inspection jig 200, and a wire harness inspection device 100. The wire harness inspection system 10 may also include a display device 40 that displays inspection results.

[0015] The inspection jig 200 is a jig for inspecting whether or not clips 310 provided at multiple locations on the wire harness 300 are attached, and as shown in Fig. 1, multiple inspection jigs 200a to 200e, ..., 200n are installed on a jig plate 20. Hereinafter, when there is no need to distinguish between the inspection jigs 200a to 200e, ..., 200n, they will simply be referred to as "inspection jig 200".

[0016] 2 is a diagram for explaining the inspection jig 200 in the wire harness inspection system 10 according to the first embodiment. As shown in FIG. 2, by mounting (holding) the wire harness 300 on the electric wire holder 210, a part of the clip 310 provided on the wire harness 300 is inserted into the inspection jig 200.

[0017] Fig. 3 is a diagram showing a configuration of an inspection jig 200 in the wire harness inspection system 10 according to the first embodiment. As shown in Fig. 3, the inspection jig 200 includes an inspection jig housing 201 provided with a lighting unit 202 and a limit switch 203. The inspection jig 200 may also be provided with a power generation unit 251 such as a solar cell.

[0018] In the wire harness inspection system 10 according to the first embodiment, when the clip 310 shown in FIG. 2 is inserted into the inspection jig housing 201, the limit switch 203 of the inspection jig 200 is pressed, and light is emitted from the lighting unit 202. The lighting unit 202 lights up when the clip 310, which is an exterior part, is attached based on the power generated by the power generation unit 251. The lighting unit 202 may be configured as an LED (Light-Emitting Diode), for example. The power generation unit 251 may be configured to be provided on the jig plate 20 as the power supply device 250 shown in FIG. 1.

[0019] 4A and 4B are schematic diagrams showing a circuit configuration of the inspection jig 200 in the wire harness inspection system 10 according to the first embodiment. The inspection jig 200 can use a power generating unit 251 such as a solar cell as a power source for the lighting unit 202. The inspection jig 200 can also use a storage element such as a storage battery 252 as necessary. An LED, which is an example of a light source for the lighting unit 202, generally requires a forward voltage of 2 V to several volts to emit light, although this differs depending on the emitted color, etc.

[0020] If the output voltage of power generating unit 251 is larger than that, resistor 206 for adjusting the current may be inserted as shown in Fig. 4A. If the output voltage is less than the required value of lighting unit 202, for example, when power generating unit 251 such as a solar cell is made smaller, a boost circuit 253 as shown in Fig. 4B may also be used.

[0021] Fig. 5A is a diagram for explaining the manufacturing drawing reference data 122a in the wire harness inspection system 10 according to the first embodiment. As shown in Fig. 5A, the manufacturing drawing reference data 122a in the wire harness inspection system 10 includes a wiring path 220 and a symbol marking 230. Moreover, an area A1 shown in Fig. 5A indicates an area where an inspection jig 200 is expected to be attached.

[0022] The wiring path 220 indicates a location where the wire harness 300 is arranged. Moreover, the symbol mark 230 indicates a position where an exterior part is mounted, and a position where the inspection jig 200 is arranged. The symbol mark 230 corresponds to the mounting position information A2.

[0023] Fig. 5B is a diagram for explaining the lighting area reference data 122b in the wire harness inspection system 10 according to the first embodiment. The lighting area reference data 122b is data obtained by extracting a location (mounting position information A2) where the lighting portion 202 of the inspection jig 200 is assumed to be located from the manufacturing drawing reference data 122a shown in Fig. 5A.

[0024] This lighting area reference data 122b may be created by a user by extracting in advance the positions of the lighting parts 202 from the manufacturing drawing reference data 122a shown in Fig. 5A. Moreover, the lighting area reference data 122b may be extracted by a lighting part extraction unit 113 of the wire harness inspection device 100 described later. The manufacturing drawing reference data 122a and the lighting area reference data 122b are stored in a manufacturing drawing information DB 122 (see Fig. 10) described later.

[0025] Fig. 6A is a diagram for explaining attachment of the inspection jig 200 in the wire harness inspection system 10 according to the first embodiment. Note that the example shown in Fig. 6A shows a state before the wire harness 300 is held by the electric wire holder 210. Also, the example shown in Fig. 6A shows an example in which a wiring path 220 and a symbol marking 230 are attached to the jig plate 20. Details of the configuration in which the wiring path 220 and the symbol marking 230 are attached to the jig plate 20 will be described later.

[0026] Moreover, Fig. 6B is a diagram for explaining the inspection jig 200 in the wire harness inspection system 10 according to the first embodiment, and is a diagram of the jig plate 20 shown in Fig. 6A as viewed from above. As shown in Fig. 6B, a symbol mark 230 is attached to the side of the inspection jig 200 (upper part in the figure) on the jig plate 20.

[0027] Fig. 7A is a diagram for explaining the inspection jig 200 in the wire harness inspection system 10 according to the first embodiment. Note that, in the example shown in Fig. 7A, a state in which the wire harness 300 is held by the electric wire holder 210 is shown.

[0028] Fig. 7B is a diagram for explaining the inspection jig 200 in the wire harness inspection system 10 according to the first embodiment, and is a diagram showing the jig plate 20 holding the wire harness 300 shown in Fig. 7A as viewed from above. In the example shown in Fig. 7B, a state in which light is emitted from the lighting unit 202 is shown.

[0029] 8A to 8C are diagrams for explaining the inspection jig 200, in which Fig. 8A shows an example of an inspection reference image (reference data), and Figs. 8B and 8C show examples in which the lighting unit 202 is turned off and on, respectively. In this way, the wire harness inspection system 10 can inspect whether the clip 310 is properly attached to the wire harness 300 by detecting the off and on states of the lighting unit 202 in the inspection reference image.

[0030] (Configuration of Wire Harness Inspection Device) Next, a description will be given of details of the wire harness inspection device 100 in the wire harness inspection system 10. Fig. 9 is a block diagram showing the configuration of the wire harness inspection device 100 according to the first embodiment.

[0031] In this embodiment, the wire harness inspection device 100 is configured by a general computer including a control unit 110, a storage unit 120, an input / output IF 130 (Interface), and a communication IF 140. The control unit 110 and the storage unit 120 will be described in detail later.

[0032] The input / output IF130 is, for example, a component (interface) for the wire harness inspection device 100 to exchange data with the imaging device 30 and the display device 40. The input / output IF130 includes, for example, an input IF and an output IF (not shown). The input / output IF130 may also be, for example, a component for a user to exchange data with the wire harness inspection device 100.

[0033] The input IF in the input / output IF 130 has an interface function for inputting various pieces of information from the imaging device 30 or a user.

[0034] The output IF in the input / output IF 130 causes a display device 40 connected to the wire harness inspection device 100 to display an inspection result, which will be described later. The display device 40 is, for example, a display device, a projector device, or the like.

[0035] The wire harness inspection device 100 may also include a communication IF 140. The communication IF 140 may be a component used, for example, when acquiring image data captured by the imaging device 30 through wireless communication. The communication IF 140 may also transmit the inspection results to another device via a network (not shown). This allows a user to check the inspection results remotely without needing to be located near the wire harness inspection system 10.

[0036] (Functional configuration of wire harness inspection device) 10 is a block diagram showing a functional configuration of the wire harness inspection device 100 according to the first embodiment. The control unit 110 of the wire harness inspection device 100 includes, as functions, an image data acquisition unit 111, a manufacturing drawing data acquisition unit 112, a lighted portion extraction unit 113, a data comparison unit 114, a lighted state determination unit 115, and an inspection result display unit 116.

[0037] The control unit 110, for example, operates an operating system to control the entire wire harness inspection device 100. Furthermore, the control unit 110 operates based on a program stored in the storage unit 120 to execute each of the above-mentioned functions. Note that the program is not limited to being stored in the storage unit 120, and may be stored in, for example, a ROM (Read Only Memory) (not shown) in the wire harness inspection device 100.

[0038] 10, the storage unit 120 stores information included in an image data information DB 121 (DB: Database), a manufacturing drawing information DB 122, and a judgment result information DB 123 as data. The storage unit 120 for storing these data may be one or more. For example, a single storage unit 120 may be configured to store the data in separate areas. Alternatively, the data may be distributed and stored in a plurality of storage devices installed in physically separate locations.

[0039] The image data acquiring unit 111 acquires image data captured by the imaging device 30. The image data acquiring unit 111 stores the acquired image data in the image data information DB 121. The image data includes the wire harness 300, the jig plate 20 on which the wire harness 300 is placed, and the inspection jig 200 having a lighting unit 202 that is provided on the jig plate 20 and lights up when an exterior part of the wire harness 300 is attached.

[0040] The manufacturing drawing data acquisition unit 112 acquires manufacturing drawing reference data 122a, which is drawing data of the wire harness 300 and includes mounting position information where an exterior part is mounted on the wire harness 300. For example, the manufacturing drawing data acquisition unit 112 acquires the manufacturing drawing reference data 122a via the input / output IF 130 or the communication IF 140. In addition, the manufacturing drawing data acquisition unit 112 stores the acquired manufacturing drawing reference data 122a in the manufacturing drawing information DB 122. Note that, when the manufacturing drawing reference data 122a is stored in advance in the manufacturing drawing information DB 122 by a user, the manufacturing drawing data acquisition unit 112 may be configured to acquire the manufacturing drawing reference data 122a from the manufacturing drawing information DB 122.

[0041] The lighting portion extraction unit 113 extracts lighting area reference data 122b including the mounting position information A2 from the manufacturing drawing reference data 122a. The lighting portion extraction unit 113 also stores the extracted lighting area reference data 122b in the manufacturing drawing data acquisition unit 112.

[0042] The data comparison unit 114 compares the image data in the mounting position information A2 based on the image data and the manufacturing drawing reference data 122a. In addition, when the lighting area reference data 122b is stored in the manufacturing drawing information DB 122, the data comparison unit 114 may compare the image data in the mounting position information A2 based on the image data and the lighting area reference data 122b. For example, when the data comparison unit 114 uses the lighting area reference data 122b to compare with the image data, the comparison target area is narrowed down, so that it is possible to more accurately compare the image data with the lighting area reference data 122b, which is the reference data.

[0043] The lighting determination unit 115 determines whether the lighting unit 202 is turned on or not based on the comparison result of the data comparison unit 114. Furthermore, the lighting determination unit 115 stores the determination result in the determination result information DB 123.

[0044] 11A and 11B are diagrams for explaining image data in the wire harness inspection system 10 according to the first embodiment. As shown in FIG. 11A and FIG. 11B, when the brightness and / or color change in a predetermined pixel of the image data is higher than a predetermined threshold, it is determined that the light-emitting unit (lighting unit 202) is turned on. FIG. 11A shows an example in which the brightness and / or color change in a predetermined pixel of the image data is lower than the predetermined threshold, and the light-emitting unit is not turned on. Also, FIG. 11B shows an example in which the brightness and / or color change in a predetermined pixel of the image data is higher than the predetermined threshold, and the light-emitting unit is turned on.

[0045] In this embodiment, the lighting determination unit 115 may use an RGB image or YCrCb spatially converted data as image data to detect the color of the light emitted by the lighting unit 202. In addition, the predetermined threshold in the lighting determination unit 115 may be set to a level at which the light intensity is not affected by changes in environmental light or reflections of illumination light.

[0046] The inspection result display unit 116 displays the result of the lighting determination unit 115. Specifically, the inspection result display unit 116 displays the determination result stored in the determination result information DB 123 on the display device 40.

[0047] (Outline of Processing Flow of Wire Harness Inspection Device 100) Next, the flow of processing in the wire harness inspection device 100 will be shown using the flowchart shown in Fig. 12. A series of operations of the wire harness inspection device 100 shown in the flowchart of Fig. 12 starts when the wire harness inspection device 100 is started, and ends when the work is completed. The processing in the flowchart shown in Fig. 12 also ends when the power is turned off or an interrupt is issued to end the processing. In the following explanation of the flowchart, the same contents as those described in the above-mentioned explanation of the wire harness inspection system 10 and the wire harness inspection device 100 will be omitted or simplified.

[0048] In step S1201, the image data acquisition unit 111 acquires image data captured by the imaging device 30. The image data acquisition unit 111 also stores the acquired image data in the image data information DB 121. The image data includes the wire harness 300, the jig plate 20 on which the wire harness 300 is placed, and the inspection jig 200 including the lighting unit 202 that is provided on the jig plate 20 and lights up when an exterior part of the wire harness 300 is attached. Then, the process proceeds to step S1202.

[0049] In step S1202, the manufacturing drawing data acquisition unit 112 acquires manufacturing drawing reference data 122a, which is drawing data of the wire harness 300 and includes mounting position information where an exterior part is mounted on the wire harness 300. For example, the manufacturing drawing data acquisition unit 112 acquires the manufacturing drawing reference data 122a via the input / output IF 130 or the communication IF 140. In addition, the manufacturing drawing data acquisition unit 112 stores the acquired manufacturing drawing reference data 122a in the manufacturing drawing information DB 122. Note that, if the manufacturing drawing reference data 122a is stored in advance in the manufacturing drawing information DB 122 by a user, the manufacturing drawing data acquisition unit 112 may be configured to acquire the manufacturing drawing reference data 122a from the manufacturing drawing information DB 122. Thereafter, the process proceeds to step S1203.

[0050] In step S1203, the lighting portion extraction unit 113 extracts lighting area reference data 122b including the mounting position information A2 from the manufacturing drawing reference data 122a. The lighting portion extraction unit 113 also stores the extracted lighting area reference data 122b in the manufacturing drawing data acquisition unit 112. After that, the process proceeds to step S1204.

[0051] In step S1204, the data comparison unit 114 compares the image data in the mounting position information A2 based on the image data and the manufacturing drawing reference data 122a. In addition, when the lighting area reference data 122b is stored in the manufacturing drawing information DB 122, the data comparison unit 114 may compare the image data in the mounting position information A2 based on the image data and the lighting area reference data 122b. Then, the process proceeds to step S1205.

[0052] In step S1205, the lighting determination unit 115 determines whether the lighting unit 202 is turned on or not based on the comparison result of the data comparison unit 114. The lighting determination unit 115 also stores the determination result in the determination result information DB 123. After that, the process proceeds to step S1206.

[0053] In step S1206, the inspection result display unit 116 displays the result of the lighting determination unit 115. Specifically, the inspection result display unit 116 displays the determination result stored in the determination result information DB 123 on the display device 40. The process then proceeds to step S1207.

[0054] In step S1207, the control unit 110 determines whether the inspection process has been completed. If the control unit 110 determines in step S1207 that the inspection process has been completed (step S1207: YES), the process ends. On the other hand, if the control unit 110 determines in step S1207 that the inspection process has not been completed (step S1207: NO), the process returns to step S1201, and the process from step S1201 is repeatedly performed.

[0055] As described above, the wire harness inspection device 100 according to the first embodiment is a device that inspects whether or not an exterior part is attached to the wire harness 300. The wire harness inspection device 100 includes an image data acquisition unit 111 that acquires image data captured by the imaging device 30. The image data includes the wire harness 300, the jig plate 20 on which the wire harness 300 is placed, and the inspection jig 200 that is provided on the jig plate 20 and has a lighting unit 202 that lights up when an exterior part of the wire harness 300 is attached. The wire harness inspection device 100 also includes a manufacturing drawing data acquisition unit 112 that acquires manufacturing drawing reference data that is drawing data of the wire harness 300 and includes mounting position information where the exterior part is mounted on the wire harness 300. The wire harness inspection device 100 also includes a data comparison unit 114 that compares the image data in the mounting position information based on the image data and the manufacturing drawing reference data. The wire harness inspection device 100 also includes a lighting determination unit 115 that determines whether the lighting unit 202 is turned on or not based on the comparison result of the data comparison unit 114. The wire harness inspection device 100 also includes an inspection result display unit 116 that displays the result of the lighting determination unit 115.

[0056] This enables the wire harness inspection device 100 to appropriately determine whether or not an exterior device is attached with a simple configuration.

[0057] The wire harness inspection device 100 may further include a lighting portion extraction unit 113 that extracts lighting portion reference data indicated by the mounting position information from the manufacturing drawing reference data. The data comparison unit 114 may compare the image data based on the lighting portion reference data extracted by the lighting portion extraction unit 113 and the image data. In this way, when the data comparison unit 114 uses the lighting portion reference data 122b to compare with the image data, the comparison target area is narrowed down, so that it is possible to more accurately compare the image data with the lighting portion reference data 122b that is the reference data.

[0058] Furthermore, the inspection jig 200 of the wire harness inspection system 10 may include a power generation unit 251. The lighting unit 202 may be turned on when an exterior part is attached, based on the power generated by the power generation unit 251. This allows the wire harness inspection system 10 to turn on the lighting unit 202 with the power generated by the power generation unit 251 of the inspection jig 200, thereby making it possible to prevent unnecessary power consumption.

[0059] Second embodiment As described above, one specific embodiment has been described, but the above-described embodiment is merely an example and is not intended to limit the embodiments. For example, in the above-described embodiment, the presence or absence of the clip 310 is determined based on whether the lighting unit 202 of the inspection jig 200 is lit. Here, a description will be given of a configuration of the wire harness inspection device 100 according to the second embodiment in which the lighting unit 202 turns on and off light emission in a predetermined pattern, the configuration being different from that of the first embodiment.

[0060] 13A and 13B show examples of a signal of the lighting unit 202, a frame of the imaging device 30, and a signal recognized by the imaging device 30. Also, Fig. 13A and 13B show an example in which the frame rate of the imaging device 30 is 30 fps and the light emission time of the lighting unit 202 is 1 / 300 s.

[0061] Fig. 13A shows an example where the light emitted from the lighting unit 202 is synchronized with the imaging device 30, or where synchronization is not required. Fig. 13B shows an example where the light emission time of the lighting unit 202 spans between frames, and in this case, shows an example where "1" is displayed consecutively without correct signal recognition. In a case like Fig. 13B, correct recognition is possible by providing a 01 consecutive signal for synchronization.

[0062] For example, depending on the frame rate of the imaging device 30 and the light emission timing of the lighting unit 202, synchronization may not be possible, so it is necessary to add and transmit a series of 01 signals for synchronization before the data corresponding to the pattern indicating the individual number of the inspection jig 200 on the jig plate 20.

[0063] Furthermore, when a 12-bit light emission pattern, for example, “0101 11000111”, is used, the first 4 bits correspond to a synchronization signal, and the last 8 bits correspond to data corresponding to a pattern indicating the individual number of the inspection jig 200.

[0064] If the light emitted by the lighting unit 202 spans two frames of the imaging device 30, the signal you want to send may be misrecognized, as shown in Figure 13B, and "0101" may be recognized as "11111."

[0065] However, in the wire harness inspection system 10 according to the present embodiment, since the head of the light emission pattern is "0101", it is possible to determine that synchronization is not achieved when "11111" is reached. In this case, a predetermined timing adjustment is required in the wire harness inspection system 10.

[0066] This timing adjustment may be achieved by applying a configuration such as adding a delay to the reading timing on the imaging device 30 side, and shifting the frame switching timing of the imaging device 30 such as a camera. For example, in the example shown in Fig. 13A and B, correct reading can be achieved by shifting the switching timing by 1 / 300 seconds. By adjusting the timing in this way and reading the data portion at the stage where the "0101" signal can be read, the wire harness inspection device 100 can receive the correct light emission pattern.

[0067] The control method of the image sensor (imaging device 30) used for capturing images corresponding to FIGS. 13A and 13B may be a "global shutter" method that simultaneously scans the entire area of ​​the image sensor.

[0068] Alternatively, the control method for the image sensor may be a method in which the image is scanned line by line from one side of a square to the other side for each pixel of the image sensor, i.e., a "rolling shutter" method in which scanning is performed gradually rather than simultaneously.

[0069] In this way, by providing a predetermined pattern in the light emitted from the lighting unit 202, for example, when a plurality of inspection jigs 200 are provided, it becomes possible to identify the inspection jigs 200. That is, in the wire harness inspection system 10 in the second embodiment, it becomes possible to identify a location where no exterior part is attached.

[0070] Furthermore, the light emission pattern applied in the wire harness inspection system 10 according to the second embodiment is not limited to the binary "01" (OOK: On-Off-Keying). For example, the light emission pattern may be multi-value modulation such as PAM4 (Pulse Amplitude Modulation 4) or optical OFDM (Orthogonal Frequency Division Multiplexing) data. By making the light emission pattern multi-valued in this way, it is possible to increase the data capacity.

[0071] As described above, the lighting unit 202 of the wire harness inspection system 10 according to the second embodiment may be lit in a predetermined pattern when an exterior part is attached. This enables the wire harness inspection system 10 to determine whether or not an exterior part is attached, as well as to identify a location where no exterior part is attached.

[0072] (Other embodiments) Although the embodiments have been described in detail with reference to the drawings, the present embodiments are not limited to the contents described in the above embodiments. The components described above include those that a person skilled in the art can easily imagine and those that are substantially the same. Furthermore, the configurations described above can be appropriately combined. Various omissions, substitutions, or modifications of the configurations can be made without departing from the spirit of the embodiments.

[0073] In the above embodiment, the manufacturing drawing data acquisition unit 112 is configured to acquire the manufacturing drawing reference data 122a via the input / output IF 130 and the communication IF 140. This configuration does not limit the configuration of this embodiment. For example, the wire harness inspection system 10 may be configured such that the wiring path 220 and the symbol mark 230 are attached to the jig plate 20 in advance, as shown in Figs. 6A to 6B, 7A to 7B, and 8A to 8C. In this configuration, the manufacturing drawing data acquisition unit 112 can acquire the manufacturing drawing reference data 122a from the image data acquired by the imaging device 30. In this configuration, there is no need to prepare separate reference data, and it is possible to improve the efficiency of inspection in the wire harness inspection system 10.

[0074] In the above embodiment, the clip 310 is fitted into the inspection jig 200 as an exterior part of the wire harness 300, and the limit switch 203 turns on and off the light emission of the lighting unit 202 to inspect the wire harness 300. For example, the wire harness inspection system 10 may be applied to an exterior part that cannot utilize the light emission trigger by the limit switch 203. The exterior part here may be a sound absorbing material 240 or a protective material 242.

[0075] 14 and 15 show a configuration capable of inspecting the attachment of sound absorbing material 240 and protective material 242 in wire harness inspection system 10. In the example shown in Fig. 14, a configuration is shown in which fixture plate 20 is provided with fixture plate light emitting unit 22. Light emitted from fixture plate light emitting unit 22 shown in Fig. 14 does not pass through sound absorbing material 240 or protective material 242. That is, in a location where sound absorbing material 240 or protective material 242 is not attached, the light reaches imaging device 30, and wire harness inspection device 100 can detect that an exterior part is not attached at the location where light was acquired.

[0076] The example shown in Fig. 15 shows a case where the light source is on the imaging device 30 side. In the example shown in Fig. 15, in a location where sound absorbing material 240 or protective material 242 is not attached, it is possible to detect that an exterior part is not attached by detecting reflected light L2 reflected by jig plate 20 with respect to irradiated light L1.

[0077] Furthermore, in the wire harness inspection system 10 in the above-described embodiment, an operator may start an inspection such as acquiring a camera image by operating a button, etc. Furthermore, the wire harness inspection system 10 may be configured such that the imaging device 30 is on standby when the fixture plate 20 reaches a position within the field of view of the imaging device 30 according to the flow of the conveyor.

[0078] 16A and 16B are diagrams for explaining a wire harness inspection system 10 according to another embodiment in which the imaging device 30 is turned on along the flow of the conveyor. In the example shown in FIG. 16A and FIG. 16B, a fixed post 260a is installed on the line, and a retractable bar 260b linked to a switch is provided on the jig plate 20. When the retractable bar 260b comes into contact with the fixed post 260a on the line, the retractable bar 260b may be configured to retract and turn on the switch of the imaging device 30. By linking the retractable bar 260b to the switch, it is possible to operate the imaging device 30 without disrupting the flow of the line.

[0079] FIG. 17 is a diagram for explaining a wire harness inspection system 10 according to another embodiment in which the jig plate 20 is provided with a mark 270a and a code 270b. As shown in FIG. 17, when the jig plate 20 comes into the field of view of the imaging device 30, that is, to a predetermined inspection position, the imaging device 30 may be configured to distinguish the mark 270a and the code 270b of the jig plate 20. The imaging device 30 may distinguish the mark 270a and the code 270b of the jig plate 20 and acquire an image accordingly. The mark 270a and the code 270b may be recognized by the imaging device 30, or a dedicated code reader or the like may be separately arranged and the detection of the code reader or the like may be linked to the imaging device 30. The wire harness inspection system 10 may read the code or the like on the jig plate 20, and may be used for comparison with the captured image by linking it to drawing data or inspection reference data registered in advance in a DB.

[0080] Also, the imaging device 30 capturing an image of the upper surface of the jig plate 20 may be configured to move in accordance with the jig plate 20 moving on the conveyor. This makes it possible to inspect the presence or absence of exterior parts in parallel at each stage of the assembly process of the wire harness 300 without providing a dedicated inspection process or area on the conveyor. For example, it is possible to realize a similar function by capturing images of the entire process using a wide-angle imaging device 30 and cutting out an image of the upper surface of the jig plate 20 by image processing. Conversely, it is also possible to use multiple imaging devices 30 to stitch together images.

[0081] Furthermore, a computer program (wire harness inspection program) that causes a computer to execute the processing (wire harness inspection method) in the above-mentioned wire harness inspection device 100 is included in the scope of this embodiment. Also, a computer-readable recording medium on which a wire harness inspection program is recorded is included in the scope of this embodiment. Here, any type of computer-readable recording medium may be used. Also, the computer program is not limited to one recorded on the recording medium, and may be one transmitted via an electric communication line, a wireless or wired communication line, a network such as the Internet, or the like.

[0082] The features of the wire harness inspection device 100, the wire harness inspection system 10, and the wire harness inspection method will be described below.

[0083] The wire harness inspection device 100 according to the first embodiment is a device that inspects whether or not an exterior part is attached to the wire harness 300. The wire harness inspection device 100 includes an image data acquisition unit 111 that acquires image data captured by an imaging device 30. The image data includes the wire harness 300, a jig plate 20 on which the wire harness 300 is placed, and an inspection jig 200 that is provided on the jig plate 20 and has a lighting unit 202 that lights up when an exterior part of the wire harness 300 is attached. The wire harness inspection device 100 also includes a manufacturing drawing data acquisition unit 112 that acquires manufacturing drawing reference data that is drawing data of the wire harness 300 and includes mounting position information where the exterior part is mounted on the wire harness 300. The wire harness inspection device 100 also includes a data comparison unit 114 that compares the image data in the mounting position information based on the image data and the manufacturing drawing reference data. The wire harness inspection device 100 also includes a lighting determination unit 115 that determines whether the lighting unit 202 is turned on or not based on the comparison result of the data comparison unit 114. The wire harness inspection device 100 also includes an inspection result display unit 116 that displays the result of the lighting determination unit 115.

[0084] According to the above configuration, the wire harness inspection device 100 can appropriately determine whether or not an exterior device is attached with a simple configuration.

[0085] The wire harness inspection device 100 according to the second embodiment may further include a lighting portion extraction unit 113 that extracts lighting area reference data indicated by the mounting position information from the manufacturing drawing reference data. The data comparison unit 114 may compare the image data based on the lighting area reference data extracted by the lighting portion extraction unit 113 and the image data.

[0086] According to the above configuration, when the data comparison unit 114 uses the lit area reference data 122b to compare with the image data, the comparison target area is narrowed down, so that it is possible to more accurately compare the image data with the reference data, that is, the lit area reference data 122b.

[0087] The wire harness inspection system 10 according to the third embodiment is a wire harness inspection system 10 that inspects whether or not an exterior part is attached to a wire harness 300. The wire harness inspection system 10 includes an inspection jig 200 that is provided on a jig plate 20 on which the wire harness 300 is placed and includes a lighting unit 202 that lights up when an exterior part to be attached to the wire harness 300 is attached. The wire harness inspection system 10 also includes an imaging device 30 that images the wire harness 300, a display device 40 that displays an inspection result of inspecting whether or not an exterior part is attached to the wire harness 300, and a wire harness inspection device 100. The wire harness inspection device 100 includes an image data acquisition unit 111 that acquires image data including the wire harness 300, the jig plate 20, and the inspection jig 200, and that is image data captured by the imaging device 30. The wire harness inspection device 100 also has a manufacturing drawing data acquisition unit 112 that acquires manufacturing drawing reference data, which is drawing data of the wire harness 300 and includes mounting position information where an exterior part is mounted on the wire harness 300. The wire harness inspection device 100 also has a data comparison unit 114 that compares image data in the mounting position information based on the image data and the manufacturing drawing reference data. The wire harness inspection device 100 also has a lighting determination unit 115 that determines whether the lighting unit 202 is turned on or not based on the comparison result of the data comparison unit 114. The wire harness inspection device 100 also has an inspection result display unit 116 that displays the result of the lighting determination unit 115.

[0088] According to the above configuration, the wire harness inspection system 10 can appropriately determine whether or not an exterior device is attached with a simple configuration.

[0089] The inspection jig 200 of the wire harness inspection system 10 according to the fourth embodiment may include a power generating unit 251. Furthermore, the lighting unit 202 may be lit based on the power generated by the power generating unit 251 when an exterior part is attached.

[0090] According to the above configuration, the wire harness inspection system 10 can light the lighting unit 202 with the power generated by the power generation unit 251 of the inspection jig 200, thereby making it possible to prevent unnecessary power consumption.

[0091] The lighting unit 202 of the wire harness inspection system 10 according to the fifth embodiment may be lit in a predetermined pattern when an exterior part is attached.

[0092] According to the above configuration, the wire harness inspection system 10 can determine whether or not an exterior part is attached, and can also identify a location where no exterior part is attached.

[0093] A wire harness inspection method according to a sixth embodiment is a wire harness inspection method executed by a computer, which inspects whether or not an exterior part is attached to a wire harness 300. The wire harness inspection method acquires image data captured by an imaging device 30. The image data includes the wire harness 300, a jig plate 20 on which the wire harness 300 is placed, and an inspection jig 200 provided on the jig plate 20 and including a lighting unit 202 that lights up when an exterior part of the wire harness 300 is attached. The wire harness inspection method also acquires manufacturing drawing reference data, which is drawing data of the wire harness 300 and includes mounting position information where the exterior part is mounted on the wire harness 300. The wire harness inspection method also compares image data in the mounting position information based on the image data and the manufacturing drawing reference data. The wire harness inspection method also judges whether or not the lighting unit 202 is lit based on the comparison result. Furthermore, the wire harness inspection method displays a judgment result of whether or not the lighting unit 202 is lit.

[0094] According to the above configuration, the wire harness inspection method can appropriately determine whether or not an exterior device is attached with a simple configuration. [Explanation of symbols]

[0095] 10 Wire Harness Inspection System 20 Jig plate 22 Jig plate light emitting part 30 Imaging device 40 Display device 100 Wire harness inspection device 110 Control section 111 Image data acquisition unit 112 Manufacturing Drawing Data Acquisition Department 113 Lighting section extraction section 114 Data Comparison Section 115 Lighting determination section 116 Test result display unit 120 Storage section 121 Image data information DB 122 Manufacturing drawing information DB 123 Judgment result information DB 130 Input / Output Interface 140 Communication Interface 200, 200a~200e, 200n Inspection fixture 201 Inspection fixture housing 202 Lighting section 203 Limit Switch 205 Diode 206 Resistor 240 Sound absorbing material 242 Protective materials 210 Wire holder 220 Wiring route 230 Symbols 250 Power Supply 251 Power Generation Division 252 Storage battery 253 Boost Circuit 260a fixed column 260b collapsible bar 270a Marking 270b code label 300 Wire Harness 310 clips

Claims

1. A wire harness inspection device that inspects whether an exterior part is attached to a wire harness, an image data acquisition unit that acquires image data including the wire harness, a jig plate on which the wire harness is installed, and an inspection jig that is provided on the jig plate and has a lighting unit that lights up when the exterior part of the wire harness is attached, the image data being captured by an imaging device; a manufacturing drawing data acquisition unit that acquires manufacturing drawing reference data, the manufacturing drawing data including mounting position information of the exterior part to be mounted on the wire harness; a data comparison unit that compares the image data in the mounting position information based on the image data and the manufacturing drawing reference data; a lighting determination unit that determines whether the lighting unit is lit or not based on a comparison result of the data comparison unit; an inspection result display unit that displays a result of the lighting determination unit; A wire harness inspection device comprising:

2. A lighting portion extraction unit extracts lighting area reference data indicated by the mounting position information from the manufacturing drawing reference data, The wire harness inspection device according to claim 1 , wherein the data comparison unit compares the image data based on the lighted area reference data extracted by the lighted portion extraction unit and the image data.

3. A wire harness inspection system for inspecting whether an exterior part is attached to a wire harness, comprising: an inspection jig provided on a jig plate on which the wire harness is placed, the inspection jig including a lighting unit that lights up when the exterior part to be attached to the wire harness is attached; An imaging device for imaging the wire harness; a display device that displays an inspection result of whether or not the exterior part is attached to the wire harness; and A wire harness inspection device, The wire harness inspection device includes: an image data acquisition unit that acquires image data including the wire harness, the jig plate, and the inspection jig, the image data being captured by an imaging device; a manufacturing drawing data acquisition unit that acquires manufacturing drawing reference data, the manufacturing drawing data including mounting position information of the exterior part to be mounted on the wire harness; a data comparison unit that compares the image data in the mounting position information based on the image data and the manufacturing drawing reference data; a lighting determination unit that determines whether the lighting unit is lit or not based on a comparison result of the data comparison unit; an inspection result display unit that displays a result of the lighting determination unit; A wire harness inspection system having the following features:

4. The inspection jig includes a power generation unit, The wire harness inspection system according to claim 3 , wherein the lighting unit lights up when the exterior part is attached based on the electric power generated by the power generation unit.

5. The wire harness inspection system according to claim 3 , wherein the lighting unit lights up in a predetermined pattern when the exterior part is attached.

6. A wire harness inspection method executed by a computer for inspecting whether an exterior part is attached to a wire harness, comprising: acquiring image data including the wire harness, a jig plate on which the wire harness is mounted, and an inspection jig provided on the jig plate and having a lighting unit that lights up when the exterior part of the wire harness is mounted, the image data being captured by an imaging device; acquiring manufacturing drawing reference data, the manufacturing drawing reference data being drawing data of the wire harness, the manufacturing drawing reference data including mounting position information of the exterior part to be mounted on the wire harness; The image data in the mounting position information is compared based on the image data and the manufacturing drawing reference data; Based on the comparison result, it is determined whether the lighting unit is lit or not; displaying a determination result as to whether the lighting portion is lit or not; Wire harness inspection method.

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