WO2007144986A1

WO2007144986A1 - Device and method for inspecting external appearance of wire harness

Info

Publication number: WO2007144986A1
Application number: PCT/JP2007/050024
Authority: WO
Inventors: Hideo Oonishi; Masatomo Takamura
Original assignee: Sumitomo Wiring Systems, Ltd.
Priority date: 2006-06-12
Filing date: 2007-01-05
Publication date: 2007-12-21
Also published as: CN101421582A; JP4670743B2; JP2007333399A

Abstract

A technique capable of coping with a change of a wire harness and capable of inspecting external appearances of wire harnesses at constant accuracy. A wire harness (10) is held on a harness holding member (20). A contact receiving member (160) is provided at a harness support column section (24), and an identification mark (130) is adhered to the contact receiving section (160). A contact member (164) is integrally provided at an imaging section (140), and a positional information acquiring camera (132) is attached to the forward end of the contacting member (164). A target portion of inspection is imaged by the imaging section (140) with the forward end of the contacting member (164) caused to be in contact with the contact receiving member (160). The position of the target object can be specified based on an image of the identification mark (130) read by the positional information acquiring camera (132), and a pass or fail judgment on the result of the external appearance inspection is made based on the image taken by the imaging section (140).

Description

Specification

Wire harness appearance inspection device and appearance inspection method

Technical field

[0001] The present invention relates to a technique for performing an appearance inspection of a wire harness such as an automobile wire harness.

Background art

[0002] As a technique for inspecting the appearance of a wire harness, there are a technique for visually inspecting and a technique for inspecting by image processing.

[0003] As a technique for visual inspection, there is a technique disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2001-108404). In Patent Document 1, a touch screen is installed on the original harness drawing, and a completed wire harness is arranged on the touch screen. Then, compare each inspection target part of the completed wire harness and the actual size of the harness by visual inspection, and if the operator decides to pass the test, press the confirmation button on the touch screen to perform the inspection. And then.

[0004] Techniques for performing inspection by image processing include those disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 7-103910) and those disclosed in Patent Document 3 (Japanese Patent Laid-Open No. 2001-27518). .

[0005] In the technique disclosed in Patent Document 2, the camera is moved so as to scan the wire harness. Further, the assembly drawing board is divided into a plurality of areas in advance, and a positional deviation correction mark is provided in each area. Then, when a misregistration correction mark is detected during the scanning of the camera, an inspection area is set based on the misregistration correction mark, and the appearance quality is judged in accordance with the inspection area! /, The

[0006] In the technique disclosed in Patent Document 3, the pan / tilt camera images each inspection target position in the wire harness according to preset teaching data, and the appearance quality is determined based on the imaging data at each inspection target position. Make a decision.

Disclosure of the invention

However, since the technique disclosed in Patent Document 1 is an inspection that relies on visual observation after all, it is difficult to maintain a certain inspection accuracy. [0008] In addition, in the techniques disclosed in Patent Document 2 and Patent Document 3, every time there is a change in the wire harness, the setting of the inspection area for the misalignment correction mark, the teaching data setting of the pan / tilt camera, etc. are changed. There is a need. For these inspection areas and teaching data setting change work, special techniques are usually required, so there is a problem that changes at the assembly site of the wire harness cannot be easily handled.

[0009] An object of the present invention is to provide a technique that can easily cope with a change in a wire harness and can maintain a constant appearance inspection accuracy of the wire harness.

[0010] In order to solve the above problems, this wire harness appearance inspection apparatus is a wire harness appearance inspection apparatus that performs an appearance inspection of a wire harness having a plurality of inspection target parts, and is a harness that can be set with a wire harness. Obtained from a holding member, a position information providing unit provided at a position corresponding to each of the examination target parts of the harness holding member, an imaging unit capable of imaging each of the examination target parts, and the position information providing part Based on the information! /, A position specifying part for specifying the inspection target part, a storage part storing inspection information in which the reference inspection data is associated with each inspection target part, and a captured image are obtained through the imaging part. If specified, the reference inspection data is specified based on the inspection target part specified by the position specifying unit and the inspection information, and the specified reference inspection data and Serial based on the captured image obtained through the imaging unit, in which a determining adequacy determining unit inspection acceptance of definitive the inspection target site was its imaging target.

[0011] With this, when a captured image is obtained through the imaging unit, the reference examination data is identified based on the examination target site specified by the position identification unit and the examination information, and the identification is performed. Based on the reference inspection data thus obtained and the captured image obtained through the imaging unit, the pass / fail inspection accuracy at the inspection target part that is the imaging target is determined, so that the appearance inspection accuracy of the wire harness can be maintained constant.

[0012] When the wire harness is changed, the position of the position information adding unit is changed, added, or deleted, or the correspondence between each inspection target part and the reference inspection data in the inspection information is changed. Can be dealt with. Therefore, it is relatively easy to deal with changes in the wire harness.

[0013] In this case, a position guarantee that guarantees a relative position between the imaging unit and the inspection target part It is good also as a structure further provided with the member.

[0014] Thereby, a more stable captured image can be obtained, and the inspection accuracy can be further improved.

[0015] The harness holding member includes a harness support body member and a plurality of harness support pillars that are erected on the harness support body member and hold the wire harness at a position above the harness support body member. The position assurance member is provided integrally with the abutting member attached to the harness support pillar portion in association with each inspection target portion and the imaging portion, and is in contact with the abutting member. A contact member that is in contact with and is disposed at a predetermined distance from the contacted member.

[0016] Thereby, since the imaging unit and the contacted member can be kept in a fixed distance relationship, a stable captured image suitable for inspection can be obtained, and the inspection accuracy can be further improved. The

[0017] Further, the harness holding member includes a harness support body member and a plurality of harness support pillars that are erected on the harness support body member and hold the wire harness at a position above the harness support body member. The position assurance member is provided integrally with the imaging unit, and has a contact member that contacts the support main body member and disposes the imaging unit at a predetermined height position from the support main body. It may be a thing.

[0018] With this, the abutting member is brought into contact with the single support body member, so that the distance between the imaging unit and the inspection target part can be kept at a predetermined distance, which is suitable for inspection. In addition, a stable captured image can be obtained, and the inspection accuracy can be further improved.

[0019] Further, the position information adding unit is an identification mark provided on the contacted member or the harness support main body unit in association with each inspection target part, and the position specifying unit is configured to A mark reading unit provided on a member and capable of reading the identification mark in a state in which the contact member is in contact with the contacted member or the harness support main body, and is read by the mark reading unit. Based on the identification mark image! It may be something that identifies the part to be examined.

[0020] This is convenient because the part to be inspected can be imaged when the contact member is brought into contact with the contacted part and the identification mark is read by the mark reading part. [0021] Further, the position information adding unit is provided in association with each of the inspection target parts, and an identification mark provided at a position where each of the inspection target parts can be imaged through the imaging unit together with the corresponding inspection target part. The position specifying unit may specify a region to be inspected based on an identification mark image in an image captured through the imaging unit.

[0022] This is convenient because the inspection target part can be specified by imaging the inspection target part.

[0023] Further, in order to solve the above-described problem, a wire harness appearance inspection method is a wire harness appearance inspection method for performing an appearance inspection of a wire harness having a plurality of inspection target portions, and the wire harness appearance inspection method described above. A step of providing a position information assigning unit in association with each inspection target part, a step of storing inspection information in which reference inspection data is associated with each inspection target part in a storage unit, and each inspection target part by an imaging unit Based on the information obtained from the position information adding unit! Then, when the captured image is obtained through the step of specifying the inspection target region and the imaging unit, the reference inspection data is specified based on the inspection target region specified by the position specifying unit and the inspection information, A step of determining pass / fail of an inspection at a region to be inspected based on the specified reference inspection data and a captured image obtained through the imaging unit.

[0024] Thereby, the appearance inspection accuracy of the wire harness can be maintained constant.

[0025] When the wire harness is changed, the installation position of the position information adding unit is changed, or added or deleted, and each inspection target part and reference inspection data in the inspection information are changed. It can be dealt with by changing the correspondence of. Therefore, changes in the wire harness can be handled relatively easily.

The objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Brief Description of Drawings

FIG. 1 is a plan view showing a state in which a wire harness to be inspected is set on a harness holding member. FIG. 2 is a block diagram showing an appearance inspection apparatus for a wire harness according to the first embodiment.

FIG. 3 is a diagram showing a state in which an appearance inspection is performed with a connector mounting portion of a wire harness as an inspection target.

FIG. 4 is a block diagram showing an appearance inspection apparatus for a wire harness according to a second embodiment.

FIG. 5 is a view showing a state in which a region to be inspected is inspected by the appearance inspection apparatus.

FIG. 6 is a diagram showing an example of a captured image of a region to be examined by the imaging unit.

FIG. 7 is a diagram showing an example of content in which examination types are associated with each examination target part.

FIG. 8 is a diagram showing an example in which inspection contents are registered in the inspection type.

FIG. 9 is a diagram showing a display example of an appearance inspection result.

FIG. 10 is a flowchart showing the operation of the wire harness appearance inspection apparatus.

FIG. 11 is a view showing a modified example of an appearance inspection apparatus for a wire harness.

FIG. 12 is a view showing another modification of the wire harness appearance inspection apparatus.

FIG. 13 is a diagram showing an example of a captured image in the modified example.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an appearance inspection apparatus and an appearance inspection method for a wire harness according to an embodiment of the present invention will be described.

Here, an embodiment showing the basic contents of the present invention will be described in the first embodiment, and then a more specific embodiment will be described in the second embodiment.

[0030] {First embodiment}

The wire harness visual inspection apparatus and visual inspection method according to the first embodiment will be described.

[0031] First, the wire harness 10 to be inspected will be described. FIG. 1 is a plan view showing a state where the wire harness 10 to be inspected is set on the harness holding member 20.

[0032] This wire harness 10 is assembled to a vehicle along a wire harness wiring path provided in a vehicle component, and connects various electrical devices mounted on the vehicle. It is a wiring member for doing.

[0033] The wire harness 10 is configured by bundling a plurality of wiring members 12 such as electric wires while appropriately branching them. The wiring members 12 are bundled using an adhesive tape 13 or the like (see Fig. 2). Further, an attachment for attaching the wire harness 10 to the vehicle side is attached in the middle of the wire harness 10. Furthermore, a connector 14 or the like for connecting electrical equipment is appropriately attached to each end of the wire harness 10 (see FIG. 3). The wire harness 10 has attachment parts such as the adhesive tape 13, the attachment tool, and the connector 14 as a plurality of inspection object parts. The appearance inspection apparatus and the appearance inspection method for this wire harness are related to the inspection target portion of the wire harness 10 and whether or not the adhesive tape 13, the fixture, the connector 14, etc. are attached, and the attachment type (color, shape, etc.) Perform the inspection.

In addition, the harness holding member 20 includes a harness support main body 22 and a plurality of harness support pillars 24.

The harness support body 22 is a member that spreads in a planar shape or a three-dimensional shape along the developed form of the wire harness 10. Here, the harness support main body portion 22 is formed in a substantially rectangular plate-like member having a larger extent than the developed form of the wire harness 10. However, the harness support main body portion 22 may have a frame configuration constituted by a plurality of long rod-shaped members that are not necessarily plate-shaped.

The harness support column portion 24 is a member erected on the harness support main body portion 22 at an appropriate position along the deployment path of the wire harness 10. A support portion for the wire harness 10 is provided at an upper end portion of the harness support pillar portion 24. The support portion of the wire harness 10 is, for example, a portion formed in a substantially U shape, and is held so that the wire harness 10 is hooked on the substantially U shape portion. Then, by holding the wire harness 10 on each harness support pillar 24, the wire harness 10 is held in a predetermined deployed form above the harness support body 22.

[0037] The harness holding member 20 may be for assembling the wire harness 10 above the harness holding member 20, or the wire harness 10 assembled in another place may be It may be set on the harness holding member 20, that is, for inspection.

FIG. 2 is a block diagram showing an appearance inspection apparatus. 2 shows a state in which an appearance inspection is performed with the adhesive tape 13 attached portion of the wire harness 10 as an inspection target portion, and FIG. 3 excludes the attachment portion of the connector 14 of the wire harness 10 as an inspection target. Indicate the state of the inspection!

[0039] The appearance inspection apparatus includes the harness holding member 20, the position information adding unit 30, the position information acquiring unit 32 and the position determining unit 52 as a position specifying unit, the imaging unit 40, and the storage unit 56. And an inspection acceptance / rejection determination unit 54.

[0040] The position information adding unit 30 is provided at a position corresponding to each of the inspection target parts in the harness holding member 20. For example, the harness holding member 20 is provided in a portion adjacent to a position where the inspection target part is to be disposed. The position information adding unit 30 is set with an identification code assigned to each site to be examined by a predetermined method, and gives information for specifying the site to be examined to the position information acquiring unit 32.

The position information acquisition unit 32 receives the information for specifying the examination target part from the position information adding unit 30 and gives the information to the position determination unit 52.

[0042] As the position information adding unit 30 and the position information acquiring unit 32, for example, the following configuration is adopted. For example, the position information acquisition unit 30 employs a configuration in which an identification mark such as a character, symbol, figure (including bar code, etc.) is attached to the noise support main body part 22 or the harness support column part 24, and the position information acquisition part 30 As 32, a camera capable of reading the identification mark, a reader device, a touch pen device, or the like is used. Alternatively, an RF tag (IC tag) used in RFID (Radio Frequency Identification) is used as the position information adding unit 30, and a reader device that can read RF tag power information is used as the position information acquiring unit 32. It is completed. In the configuration using the RF tag and its reader device, when the reader device is integrated with the imaging unit 40 and the position to be inspected is imaged by the imaging unit 40 as described later, the RF tag corresponding to the reader device is used. It is preferable that the communicable distance between them is set to such an extent that it can be communicated only with.

That is, the position information adding unit 30 can employ a configuration in which predetermined information can be set by various methods, and the position information acquiring unit 32 can store predetermined information according to the setting method. Various configurations that can be read can be employed.

Of these, a configuration using an identification mark as the position information adding unit 30 and a camera capable of reading the identification mark as the position information acquiring unit 32 will be described in the second embodiment. Further, a configuration in which an identification mark is employed as the position information adding unit 30 and the image capturing unit 40 for imaging the examination target region is shared as the position information acquiring unit 32 will be described as a modification.

[0045] The imaging unit 40 is configured to be able to image each examination target region. More specifically, the imaging unit 40 is a camera configured by a CCD, a CMOS, or the like, and is connected to an inspection processing apparatus 50, which will be described later, via a wired or wireless communication. The imaging unit 40 can be moved and its posture can be changed manually by a worker or the like. As a result, when the operator holds the imaging unit 40 and moves the imaging unit 40, the imaging unit 40 can sequentially image each examination target region.

The functions as the position determination unit 52, the inspection pass / fail determination unit 54, and the storage unit 56 are incorporated in the inspection processing device 50. The inspection processing device 50 is a general computer device including a main storage device such as a CPU and a RAM, and an auxiliary storage device such as a hard disk device, and is configured by a personal computer, for example. The functions of the position determination unit 52 and the inspection pass / fail determination unit 54 in the inspection processing apparatus 50 are realized by a software program stored in advance.

[0047] When the information from the position information adding unit 30 is obtained through the position information acquiring unit 32, the position determining unit 52 specifies a region to be inspected based on the information. Then, the inspection target part specifying information is given to the inspection pass / fail determination unit 54.

[0048] The storage unit 56 is configured by an auxiliary storage device such as a hard disk device, and stores examination information in which reference examination data is associated with each examination target part. The reference inspection data is reference data for determining pass / fail of inspection associated with each inspection target part. For example, the reference data relating to the inspection target part to which the adhesive tape 13 of a predetermined color is applied is data indicating the minimum area where the presence of the predetermined color is required. In addition, for example, the reference data regarding the inspection target part to which the connector 14 having a predetermined color and a predetermined shape is connected includes data indicating the minimum area where the predetermined color is required and the corresponding data. This is reference pattern data corresponding to the outer shape of the connector 14.

[0049] When a captured image is obtained through the imaging unit 40, the inspection acceptance / rejection determination unit 54, based on the inspection target part specified by the position determination unit 52 and the inspection information, the reference inspection data used for the acceptance determination Is identified. Then, based on the specified reference inspection data and the captured image obtained through the imaging unit 40, the pass / fail of the inspection in the inspection target portion that is the imaging target is determined.

[0050] For example, as an inspection relating to an inspection target region to which a connector 14 having a predetermined color and a predetermined shape is connected (see FIG. 2), an area of the predetermined color is extracted from a captured image obtained through the imaging unit 40, It is determined whether or not the area of the area exceeds the minimum area, and if it exceeds the area, a determination is made that the area is acceptable. In other words, if the correct color adhesive tape 13 is wound around the site to be inspected, it is determined that the test is successful.

[0051] Further, for example, as an inspection relating to an inspection target part to which a connector 14 having a predetermined color and a predetermined shape is connected (see FIG. 3), a captured image obtained through the imaging unit 40 is used in the same manner as described above. It is determined whether or not it is determined whether or not the predetermined color area exceeds the minimum area. In addition, the pattern search is performed based on the reference pattern in the captured image, and it is determined whether or not a pattern within a predetermined approximate range from the reference pattern has been searched. And when these both discrimination | determination is a pass, the pass determination is made. In other words, if the correct shape and color of the connector 14 (that is, the correct type of connector) is attached to the site to be inspected, a pass / fail judgment is made.

[0052] Then, the pass / fail judgment results of these inspection pass / fail judgment units 54 are output to the pass / fail judgment output unit 58. The pass / fail judgment output unit 58 includes display means such as a monitor and a lamp, a sounding body (speaker, buzzer, etc.), etc., and outputs the pass / fail result to the operator so as to be recognized. Then, the operator can recognize the pass / fail of each inspection target part through the pass / fail judgment output unit 58.

The inspection method using the wire harness inspection apparatus configured as described above will be described.

First, the harness holding member 20 corresponds to each inspection target portion of the wire harness 10. In addition, a position information adding unit 30 is provided for each. Each position information adding unit 30 is set with a unique identification code.

[0055] Then, the examination information in which the reference examination data is associated with each examination target part is set and registered in the storage unit 56. Here, it is preferable that the reference inspection data corresponding to the inspection target part is set in advance with a reference color, area, reference pattern, and the like corresponding to the parts attached to the inspection target part. Then, when associating the reference inspection data with each inspection object part, it is preferable that the preset reference data can be selected and set. As a result, it is possible to reduce the necessity of newly creating reference inspection data for each change of the wire harness 10 and to more easily cope with the change of the wire harness 10. However, even in this case, it is necessary to create new reference inspection data for the inspection target parts that adopt new parts.

[0056] When the wire harness 10 is inspected, the operator picks up each part to be inspected by holding the imaging unit 40 by hand. At this time, the information of the position information adding unit 30 is given to the position determination unit 52 through the position information acquisition unit 32, and the position determination unit 52 specifies the inspection target part and the specified inspection target part and the inspection information. Based on the above, reference inspection data should be specified. Then, based on the identified reference inspection data and the captured image obtained through the imaging unit 40, the pass / fail of the inspection in the inspection target part that is the imaging target is determined, and the pass / fail determination result is output as a pass / fail determination output. Notified through part 58. As a result, the operator can know whether or not the inspection is successful at the site to be inspected.

[0057] The operator continues to perform the same operation as described above for other parts to be examined. As a result, an appearance inspection can be performed at each inspection target portion of the wire harness 10.

[0058] Further, when there is a change in the type of the wire harness 10 such as a type change or a design change, the following measures are taken.

[0059] First, when the position of the inspection target part is changed while the mounting parts and the like remain unchanged, the arrangement position of the position information adding unit 30 is changed to a place corresponding to the changed position.

[0060] Next, when the inspection target part is deleted, the corresponding position information adding unit 30 is deleted, and among the inspection information in the storage unit 56, the inspection target part to be deleted is deleted. Delete registration information about.

[0061] Further, when there is a follow-up of the inspection target part, a position information adding unit 30 is additionally provided at a position corresponding to the added inspection target part, and the inspection information in the storage unit 56 is also provided. The reference data for pass / fail judgment is set in association with the information on the part to be examined that was added in the report.

[0062] With these measures, an appearance inspection can be performed as before.

[0063] According to the appearance inspection device and the appearance inspection method of the wire harness 10 configured as described above, when the captured image is obtained through the imaging unit 40, the inspection target portion and the inspection information specified by the position determination unit 52 are obtained. Compared with visual inspection, the wire harness 10 is compared with the visual inspection to identify the standard inspection data and determine pass / fail of the inspection target part based on the reference inspection data and the captured image. Appearance inspection accuracy can be kept constant.

[0064] When the wire harness 10 is changed, the position of the position information adding unit 30 is changed, added, or deleted, or the correspondence between each inspection target part and the reference inspection data in the inspection information is changed. You can deal with it. Therefore, as compared with the conventional case where the inspection target range and teaching data are changed, the change of the wire harness can be dealt with relatively easily.

[0065] Further, since the imaging unit 40 images one site to be inspected, a relatively low-resolution one can be used, which leads to cost reduction.

[0066] {Second Embodiment}

Next, a wire harness appearance inspection apparatus and appearance inspection method according to a second embodiment of the present invention will be described. Note that components common to the above-described embodiment, such as the wire harness 10 and the noise holding member 20 to be inspected, are denoted by the same reference numerals and description thereof is omitted.

FIG. 4 is a block diagram showing an appearance inspection apparatus according to the present embodiment, and FIG. 5 is a view showing a state in which an inspection target part is inspected by the appearance inspection apparatus.

This appearance inspection apparatus includes a harness holding member 20, an identification mark unit 130 as a position information adding unit, a position information acquisition camera 132 and a position determination unit 153b as a position specifying unit, and an imaging unit 140. A storage unit 154 and an inspection pass / fail determination unit 153a. Caro, this The appearance inspection apparatus is provided integrally with the abutting member 160 attached to the harness support pillar 24 and the imaging unit 140 as a position assurance member that guarantees the relative position between the imaging unit 140 and the site to be inspected. The contact member 164 is provided.

That is, the contacted member 160 is attached to one of the harness support pillars 24 that is associated with the region to be inspected (usually in the vicinity of the region to be inspected). The abutted member 160 is formed in a substantially rectangular parallelepiped block shape, and one end of the abutted member 160 extends toward the side of the harness support pillar 24, and the other end of the abutted member 160 is supported by the harness. It is installed on the pillar 24. At this time, the upper surface of the portion of the harness support column 24 that extends laterally is disposed at a certain relative positional relationship with respect to the inspection target region, particularly at a certain vertical relationship position with respect to the inspection target region. It has become like that. The contact member 164 can be brought into contact with the upper surface of a portion of the harness support post 24 that extends laterally, and an identification mark portion 130 is provided.

The identification mark portion 130 represents information for specifying the inspection target position with characters, symbols, graphics, and the like, and is provided on the surface of the contacted member 160. More specifically, a sticker sheet on which information specifying the inspection target position is printed is attached to the surface of the contacted member 160. Then, as will be described later, the position information acquisition camera 132 provided at the tip of the contact member 164 is identified by the contact member 164 being in contact with the upper surface of the other end of the contacted member 160. The mark part 130 can be read.

[0071] The abutting member 164 is provided integrally with the imaging unit 140 corresponding to the imaging unit 40, and can abut on the abutted member 160. More specifically, the imaging unit 140 has a configuration in which an imaging element 144 is attached so as to capture an image of the lower side in a substantially rectangular housing 142. A contact member 164 is formed on the side portion. The contact member 164 is formed in a rod shape (in this case, a prismatic member) that extends in the imaging direction (downward here) from the imaging unit 140. Then, by bringing the front end portion of the contact member 164 into contact with the upper surface of the side portion of the contact portion that extends laterally, the imaging unit 140 corresponds to a predetermined position above the contact member 164, that is, the corresponding portion. It is configured to be disposed at a position that is a predetermined distance above the region to be examined.

In addition, a position information acquisition camera 132 is provided at the tip of the contacted member 160. Yes. The position information acquisition camera 132 is configured by a CCD, a CMOS, or the like. When the tip of the contact member 164 contacts the upper surface of the laterally extending portion of the contact member 164, the position information acquisition camera 132 reads the identification mark portion 130 attached to the upper surface. It has become.

[0073] Then, the operator grasps the integrated imaging unit 140 and the contact member 164, and disposes the imaging unit 140 above the inspection target portion, while touching the contacted portion corresponding to the inspection target portion. The tip of the contact member 164 is brought into contact with the upper surface of the laterally extending portion of the member 160. Then, the position information acquisition camera 132 reads the identification mark portion 130, and the imaging unit 140 can image the examination target region as shown in FIG. At this time, the contact member 164 and the contact member 160 ensure the relative position between the imaging unit 140 and the inspection target part (here, the relative position between the imaging unit 140 and the inspection target part in the vertical direction). ! / Because of this, the part to be examined is imaged by the imaging unit 140 at a certain angle of view. Then, the read image of the identification mark unit 130 and the captured image of the inspection target part are given to the inspection processing device 150.

The inspection processing device 150 is configured by a personal computer or the like, and includes a processing device main body 152 that controls the entire main inspection, an input device 158, and a display unit 159.

The input device 158 is an input means such as a so-called keyboard and mouse, and is used to input various commands and settings to the processing device main body 152.

[0076] The display unit 159 is a liquid crystal display device or the like, and is used to display setting contents, inspection results, and the like in this inspection.

The processing apparatus main body 152 includes a CPU 153, a main storage device such as a RAM, a storage unit 154, an input unit 155, an image input unit 156, and an image output unit 157.

The storage unit 154 includes an auxiliary storage device such as a hard disk device, and stores a control program and various setting information for performing the inspection process.

The CPU 153 has a function as the inspection pass / fail determination unit 153a and a function as the position determination unit 153b. In accordance with the control program, the position determination unit 153b performs a process of specifying the detection target region based on the image read by the position information acquisition force 132 and various setting information stored in the storage unit 154. In addition, the inspection pass / fail determination unit 153a includes a control program In accordance with the above, based on the specified inspection target region and various setting information in the storage unit 154, a process of determining whether or not the appearance inspection is performed on the inspection target region is performed.

Note that more specific setting contents in the storage unit 154 and more specific processing contents in the CPU 153 will be described later.

Further, the input unit 155 mediates an input signal from the input device 158 and gives it to the CPU 153 and the like. The image input unit 156 plays a role of taking an image signal input from the imaging unit 140 and the position information acquisition camera 132 and giving it to the CPU 153 as data that can be processed. The image output unit 157 plays a role of outputting various setting information and inspection results for inspection as image signals to be displayed on the display unit 159.

The contents set and stored in the storage unit 154 will be described. First, as shown in FIG. 7, the contents in which the examination type is associated with each examination target part are stored in the storage unit 154. Here, a unique identification code of “Ρ001”, “Ρ002”, “Ρ003”, “Ρ004”,. In addition, identification codes “T001”, “T002”, “TO 03”,... Then, the examination type “TO 01” is assigned to the examination target part “P001”, the examination type “T002” is assigned to the examination target part “P002”, the examination type “T001” is assigned to the examination target part “P003”, and the examination target part “ The inspection type “T003” is associated with “P004”. Here, the same inspection type “T002” is associated with the inspection target parts “P001” and “P002” because the same parts (adhesive tape and connector) are attached to the inspection target parts. This is because of the case.

[0083] As shown in FIG. 8, the contents of inspection are set and registered in advance for the inspection types "T001", "Τ002", and "Τ003", and stored in the storage unit 154. In other words, the inspection type “TOO” is registered to perform color inspection 1 and shape inspection 1. Also, the inspection type “TOO” is registered.

2 ”is registered to perform color inspection 2. Color inspection 1 and color inspection 2 extract, for example, an area of a predetermined color set from the captured image obtained through the imaging unit 140. (Refer to the area with diagonal mesh lines in Fig. 6.) This is an inspection to determine whether the area is larger than the set minimum area. In this test, a pattern search is performed based on the reference pattern, and it is determined whether or not the force with which the reference pattern and a pattern within a predetermined approximate range are searched is determined. The content of the inspection process is an example, and as an appearance inspection method based on the captured image of the part to be inspected, an inspection method using various image processes such as a method of defining a defective pattern and extracting the defective pattern Can be adopted.

In this embodiment, information (see FIG. 7) that associates the examination type with each examination target part, and information that associates examination contents with the examination types “Τ00”, “Τ002”, and “Τ003” (see FIG. 7). This can be done easily by selecting and setting the examination type for each part to be examined, so that the work of registering the examination details can be omitted. It is to do.

[0085] For the above, the inspection contents for the inspection types "Τ001", "Τ002", and "Τ003" are the parts to be attached to each inspection target part (color of adhesive tape, connector color, shape, etc.) It is preferable to set and register in advance according to the above. Then, when associating the examination type with each examination object part, it is preferable that the examination type can be selected and set. However, if unexpected parts or new parts are used, the inspection contents for the above inspection types “TOO”, “T002”, and “、 003” may be additionally set later.

In the present embodiment, the setting registration information shown in FIGS. 7 and 8 is examination information in which reference examination data is associated with each examination target part.

An example of an appearance inspection result displayed on display unit 159 is shown in FIG. As shown in the figure, the pass / fail result for each test result target part is indicated by “◯” or “”. “〇” means that the inspection result is acceptable, and “” means that the inspection is unsuccessful or unsuccessful (that is, the state is not acceptable). In addition, if all the parts to be inspected pass, a message to that effect is displayed. Here, “◯” is displayed in the column indicating the overall pass / fail, indicating that all the inspection target parts have passed. Therefore, by confirming the display, the manufacturer can confirm whether all the inspection target parts of the wire harness 10 have passed. In addition, in a state where the whole has not passed, it is possible to carry out the inspection for each inspection result target part before passing while confirming the pass / fail result “◯” or “” for each inspection result target part.

[0088] Concerning the appearance inspection method by the appearance inspection device of this wire harness, the appearance inspection device This will be described together with the operation. FIG. 10 is a flowchart showing the operation of the wire harness appearance inspection apparatus.

First, as shown in FIG. 7 and FIG. 8, inspection information in which reference inspection data is associated with each inspection object part is set in the appearance inspection apparatus. In addition, as described in the first embodiment, the harness holding member 20 is provided with the position information providing unit 30 in association with each inspection target portion of the wire harness 10.

[0090] Then, an appearance inspection is started. That is, while the operator holds the imaging unit 140 by hand and disposes the imaging unit 140 above the inspection target part, the upper surface of the laterally extending portion of the contact member 160 corresponding to the inspection target part The tip of the abutting member 164 is brought into contact with this. Then, the identification mark unit 130 is read by the position information acquisition camera 132 and the image of the identification mark unit 130 is given to the inspection processing device 150, and the inspection target part is imaged by the imaging unit 140 and the captured image is captured. Is supplied to the inspection processing apparatus 150.

[0091] Then, as shown in step S1, the inspection processing apparatus 150 identifies the inspection target portions "Ρ001", "Ρ002", "Ρ003", "Ρ004" ··· based on the image of the identification mark portion 130. Try. Then, the process of step S1 is repeated until the inspection target part can be specified, and when the inspection target part can be specified, the process proceeds to step S2. In step S2, examination types “T001”, “T002”, “TO 03”... (Examination standard data) are identified based on the identified examination target part and the setting information shown in FIGS.

In the next step S3, whether or not the appearance inspection for the specified inspection target part is acceptable is determined based on the image captured by the imaging unit 140 and the specified inspection type. Here, if the part in the inspection target part is properly mounted and the inspection target part is reflected well in the captured image, it is determined that the inspection is successful, and the display result on the display unit 159 is updated. Proceed to the next step S4. On the other hand, if a part in the inspection target part is not mounted or is inappropriate, or if the inspection target part is not properly reflected in the captured image, it is determined to be unacceptable. In this case, the inspection processing device 150 determines whether or not the visual inspection is accepted again based on another captured image obtained by the imaging unit 140. That is, a continuous image (a moving image or a still image at every predetermined time) can be obtained by the imaging unit 140, and the inspection processing device 150 uses the sequential imaging unit 140 until the appearance inspection passes. Based on captured image And pass / fail of the appearance inspection. From this, when a predetermined part is properly mounted on the inspection target part, if the operator appropriately adjusts the position and posture of the imaging unit 140, the pass determination is made. It has become. As a result of the adjustment, if the inspection target part where the component is properly mounted is reflected in the captured image, a pass determination is made.

[0093] When a pass determination is made in step S3, the process proceeds to step S4. In step S4, it is determined whether or not the force has been reached for all the inspection target parts. If it is before the end of the inspection, the process returns to step S1, and the processes after step S1 are repeated. On the other hand, when it is determined that the inspection is finished, the display result of the display unit 159 is updated and the appearance inspection for the wire harness 10 is finished.

Then, by setting the same type of wire harness 10 so as to be assembled or transferred to the harness holding member 20 on the harness holding member 20, the appearance inspection can be similarly performed.

[0095] If the type of the wire harness 10 is changed or the design is changed, the contacted member 160 is repositioned, added, or deleted according to the changed inspection target part. The position of the identification mark part 130 is changed, added, or deleted. In addition, as described above, the inspection target parts “Ρ001”, “Ρ002”, “Ρ003”, “Ρ004”, etc. in FIG. 7 are appropriately added and deleted, and the corresponding examination type “Τ001”, Change, add, or delete "Τ002", "Τ003" · · ·. Furthermore, if necessary, the inspection contents of the inspection types shown in Fig. 8 are also changed, supplemented, and deleted as appropriate. Thus, according to the changed wire harness 10, the inspection information in which the reference inspection data is associated with each inspection object part is set.

[0096] As described above, the position of the abutted member 160 and the identification mark portion 130 is changed, and the reference inspection data associated with each inspection target part is changed, so that the changed wire harness 10 is changed. Even a visual inspection can be performed.

[0097] According to the appearance inspection apparatus and the appearance inspection method for the wire harness 10 configured as described above, the same effects as those of the first embodiment can be obtained.

[0098] Further, since a contacted member 160 provided as a position assurance member on the harness support pillar 24 and a contact member 164 provided integrally with the imaging unit 140 are provided, the contacted member 16 By abutting the leading end portion of 0 with the abutting member 164, the distance between the imaging unit 140 and the site to be inspected can be kept constant. This makes it possible to obtain a more stable captured image obtained by imaging a region to be inspected with a constant size (angle of view), thereby further improving inspection accuracy.

[0099] It is preferable that the relative positional relationship guaranteed between the examination target part and the imaging unit 140 is at least a distance between them. Regarding the horizontal relationship between the inspection target region and the imaging unit 140, if the distance between the inspection target region and the imaging unit 140 is constant, the operator can move the imaging unit 140 as appropriate to change the inspection target region. This is because it can be expected that imaging can be performed, and if the region to be inspected has been imaged, it can be dealt with so that an appearance inspection can be easily performed by translating or rotating the captured image or the reference pattern.

[0100] In this embodiment, the contact mark 160 is provided with the identification mark portion 130 as the position information providing portion, and the position information acquisition camera 132 is provided at the tip portion of the contact member 164. While the position of the imaging unit 140 is assured by contacting the contact member 164 with the contacted member 160, the identification mark unit 130 is read by the position information acquisition camera 132, and the inspection target region is determined based on the read result. I try to identify. For this reason, it is convenient because the site to be inspected can be identified while performing position assurance and imaging the site to be inspected.

[0101] {Modification}

In the second embodiment, the contact member 160 is provided on the harness support post 24, and the tip of the contact member 164 is brought into contact with the contact member 160 to ensure the position of the imaging unit 140. However, the configuration for ensuring the position is not necessarily limited to the above example. For example, as shown in FIG. 11, the abutting member 164 is formed on a longer abutting member 264, the abutted member 160 is omitted, and the abutting member 264 is abutted against the one support body portion 22. You may make it make it. Even in this case, assuming that the wire harness 10 is held at a substantially predetermined height position with respect to the harness support main body portion 22, the distance between the imaging unit 140 and the inspection target portion is made as constant as possible. be able to.

[0102] In this case, the identification mark portion 230 may be provided in a portion of the harness support main body portion 22 where the contact member 264 is to be contacted. [0103] In the second embodiment, the position information acquisition camera 132 is provided separately from the imaging unit 140 for imaging the inspection target region. However, the captured image of the imaging unit 140 for imaging the inspection target region is provided. Based on the above, it may be possible to specify the inspection target position.

That is, as shown in FIGS. 12 and 13, the identification mark portion 330 is provided at a position corresponding to the inspection target portion in the harness support main body portion 22. Here, the identification mark portion 330 is provided at a position that is reflected together with the inspection target part when the corresponding inspection target part is to be imaged with upward force.

[0105] Then, when the imaging target position is imaged by the imaging unit 140, as shown in FIG. 13, a captured image including the image of the inspection target part and the image of the identification mark unit 330 is obtained. It is given to the processing device 150. The inspection processing device 150 specifies the inspection target position based on the image of the identification mark unit 330 in the captured image. Then, as in the second embodiment, an appearance inspection is performed.

[0106] In this modification, the inspection target position is specified based on the captured image of the imaging unit 140 for imaging the inspection target region. Therefore, there is a merit when the configuration is simplified.

In this case, a position assurance member including contact members 164, 264, etc. may be provided in the same manner as described above.

[0108] Further, the position assurance member is not limited to the example in which the relative position is guaranteed by physical contact as described above. For example, distance measuring means using laser light etc. is built into the imaging unit 140

In addition, the configuration in which the pass / fail judgment of the appearance inspection is performed based on the captured image when the distance measurement unit determines that the distance between the imaging unit 140 and the inspection target part or the harness support main body 22 is a predetermined distance. It can be used as a member.

[0109] In addition, tilt correction processing may be performed on the captured images obtained by the imaging units 40 and 140. As a result, a more accurate appearance inspection can be performed even when the imaging units 40 and 140 are imaged in an inclined posture from the inspection target region.

[0110] Further, in each of the embodiments, the example in which the wire harness 10 is for a vehicle that is assembled to a vehicle has been described, but in addition, the wiring harness 10 is used as a wiring member in various devices on which electrical components are mounted. Applicable to wire harness. As described above, the appearance inspection apparatus and the appearance inspection method for the wire harness have been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. Absent. It is understood that the power of infinite number of modifications not illustrated can be assumed without departing from the scope of the present invention.

Claims

The scope of the claims

[1] A wire harness visual inspection device for visual inspection of a wire harness having a plurality of inspection target parts,

A harness holding member capable of setting a wire harness;

A position information providing unit provided at a position corresponding to each of the inspection target parts in the harness holding member;

An imaging unit capable of imaging each inspection target part;

A position specifying unit for specifying a site to be inspected based on information obtained from the position information providing unit;

A storage unit that stores examination information in which reference examination data is associated with each examination target part; and

When a captured image is obtained through the imaging unit, reference inspection data is specified based on the inspection target portion specified by the position specifying unit and the inspection information, and the specified reference inspection data and Based on the captured image obtained through the imaging unit, the pass / fail determination unit for determining the pass / fail of the inspection target part that is the imaging target;

Wire harness appearance inspection device with

[2] A wire harness visual inspection device according to claim 1,

An appearance inspection apparatus for a wire harness, further comprising a position assurance member that guarantees a relative position between the imaging unit and the inspection target part.

[3] The wire harness appearance inspection device according to claim 2,

The harness holding member has a harness support main body member and a plurality of harness support pillars that are erected on the harness support main body member and hold the wire harness at a position above the harness support main body member.

The position assurance member is

A member to be abutted attached to the harness support column portion in association with each of the inspection target parts;

An abutting member provided integrally with the imaging unit, the abutting member being in contact with the abutted member and disposing the imaging unit at a predetermined distance from the abutted member; A visual inspection apparatus for a wire harness.

[4] The wire harness appearance inspection device according to claim 2,

The position assurance member is provided integrally with the imaging unit, and has a contact member that contacts the support main body member and arranges the imaging unit at a predetermined height position of the support main body. A wire harness appearance inspection device.

[5] A wire harness visual inspection device according to claim 3 or claim 4,

The position information providing unit is an identification mark provided on the contacted member or the harness support body unit in association with each inspection target part.

The position specifying portion includes a mark reading portion that is provided on the contact member and can read the identification mark in a state where the contact member is in contact with the contacted member or the harness support main body portion. Based on the identification mark image read by the mark reading unit! A visual inspection device for wire harnesses that identifies the target site for inspection.

[6] The visual inspection apparatus for a wire harness according to any one of claims 1 to 4, wherein the position information providing unit is provided in association with each of the inspection target portions, and the corresponding inspection target. It is an identification mark provided at a position where it can be imaged together with the part through the imaging unit,

An apparatus for inspecting the appearance of a wire harness, wherein the position specifying unit specifies a region to be inspected based on an identification mark image in a captured image captured through the imaging unit.

[7] A method for inspecting the appearance of a wire harness for inspecting the appearance of a wire harness having a plurality of inspection target parts,

Providing a position information providing unit in association with each inspection target part of the wire harness; and

Inspection information in which reference inspection data is associated with each inspection object part is stored in a storage unit. And the process of

The step of imaging each inspection target part by an imaging unit and specifying the inspection target part based on information obtained from the position information providing unit;

When a captured image is obtained through the imaging unit, reference inspection data is specified based on the inspection target portion specified by the position specifying unit and the inspection information, and the specified reference inspection data and Based on the captured image obtained through the imaging unit, and determining the pass / fail of the inspection target part that is the imaging target;

Appearance inspection method of the equipped wire harness.