JP2007333399A - Appearance inspection apparatus and appearance inspection method of wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for easily dealing with a change in a wire harness, and maintaining the accuracy of an appearance inspection of the wire harness to a fixed level. <P>SOLUTION: The wire harness 10 is held on a wire harness holding member 20. An abutted member 160 is provided in a harness holding post 24, and an identification mark 130 is attached to the abutted member 160. An abutting member 164 is integrally provided in an imaging section 140, and a position information acquiring camera 132 is attached to a tip of the abutting member 164. The tip of the abutting member 164 abuts against the abutted member 160. The imaging section 140 captures the image of a region to be inspected. The position to be inspected is identified, based on an image of the identification mark 130 captured by the position information acquiring camera 132, and pass or fail of the appearance inspection is determined, based on the image captured by the imaging section 140. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

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

  As a technique for inspecting the appearance of the wire harness, there are a technique for visual inspection and a technique for inspection by image processing.

  As a technique for visual inspection, there is one disclosed in Patent Document 1. 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, each inspection object part of the completed wire harness and the harness original size diagram are visually inspected, and when the operator judges that the inspection has passed, the confirmation button on the touch screen is pressed to perform the inspection. .

  As a technique for performing inspection by image processing, there are a technique disclosed in Patent Document 2 and a technique disclosed in Patent Document 3.

  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. When a position deviation correction mark is detected during the scanning of the camera, an inspection area is set based on the position deviation correction mark, and the quality of the appearance is determined in the inspection area.

  In the technique disclosed in Patent Document 3, each inspection target position in the wire harness is imaged in accordance with teaching data set in advance by a pan / tilt camera, and appearance quality is determined based on the imaging data at each inspection target position.

JP 2001-108404 A Japanese Patent Laid-Open No. 7-103910 JP 2001-27518 A

  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.

  In addition, in the techniques disclosed in Patent Document 2 and Patent Document 3, it is necessary to change the setting of the inspection region for the misalignment correction mark, the teaching data setting of the pan / tilt camera, etc. every time there is a change in the wire harness or the like. . For these inspection area and teaching data setting changing operations, a special technique is usually required, so that there is a problem that changes at the assembly site of the wire harness cannot be easily handled.

  Then, an object of this invention is to provide the technique which can cope with the change of a wire harness easily and can maintain the external appearance inspection precision of a wire harness constant.

  In order to solve the above-mentioned problems, the present invention is an appearance inspection device for a wire harness that performs an appearance inspection of a wire harness having a plurality of inspection target parts, and a harness holding member capable of setting a wire harness, and the harness holding member A position information providing unit provided at a position corresponding to each inspection target part, an imaging unit capable of imaging each inspection target part, and an inspection target part based on information obtained from the position information providing part. A position specifying unit to be specified, a storage unit that stores inspection information in which reference inspection data is associated with each inspection target part, and an inspection target specified by the position specifying unit when a captured image is obtained through the imaging unit Based on the part and the inspection information, the reference inspection data is specified, and the specified reference inspection data and the captured image obtained through the imaging unit Zui it, in which a determining adequacy determining unit inspection acceptance in the inspection target region from which it imaged.

  In this case, it is good also as a structure further provided with the position assurance member which ensures the relative position of the said imaging part and the said test object site | part.

  The harness holding member includes 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 guarantee member is provided integrally with the imaging unit, and the abutted member attached to the harness support pillar portion in association with each inspection target portion, and is in contact with the abutted member and the imaging unit And a contact member disposed at a position away from the contacted member by a predetermined distance.

  The harness holding member includes 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 guarantee member may be provided integrally with the imaging unit, and may include 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 portion. Good.

  Furthermore, the position information providing unit is an identification mark provided on the contacted member or the harness support main body unit in association with each inspection target site, and the position specifying unit is provided on the contact member. An identification mark image that has a mark reading portion that 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, and is read by the mark reading portion The part to be examined may be specified based on the above.

  Further, the position information providing unit is an identification mark provided in association with each of the inspection target parts, and provided at a position that can be imaged together with the corresponding inspection target part through the imaging unit, and the position specifying unit May specify an inspection target region based on an identification mark image in a captured image captured through the imaging unit.

  Further, another invention is a wire harness appearance inspection method for performing an appearance inspection of a wire harness having a plurality of inspection object parts, and a step of providing a position information providing unit in association with each inspection object part of the wire harness And a step of storing, in a storage unit, examination information in which reference examination data is associated with each examination object part, and imaging each examination object part by an imaging part, and based on information obtained from the position information providing part 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, and is specified. Based on the reference inspection data obtained and the captured image obtained through the imaging unit, the pass / fail of the inspection in the inspection target part that is the imaging target is determined. It is that a degree.

  According to the wire harness appearance inspection apparatus of the present invention, when a captured image is obtained through the imaging unit, the reference inspection data is specified based on the inspection target portion specified by the position specifying unit and the inspection information, and Based on the identified reference inspection data and the captured image obtained through the image capturing unit, the pass / fail inspection accuracy of the inspection target part that is the image capturing target is determined. Therefore, the appearance inspection accuracy of the wire harness can be maintained constant.

  Moreover, when there is a change in the wire harness, it can be dealt with by changing, adding, or deleting the position of the position information adding unit, or changing the correspondence between each inspection target part and the reference inspection data in the inspection information. Therefore, the change of the wire harness can be dealt with relatively easily.

  Further, when a position assurance member that guarantees the relative position between the imaging unit and the inspection target part is further provided, a more stable captured image can be obtained, and the inspection accuracy can be further improved.

  In addition, the position assurance member is provided integrally with the imaging member and the abutted member attached to the harness support column portion in association with each inspection target site, and abuts against the abutted member. And having the abutting member disposed at a position a predetermined distance away from the abutted member, the imaging unit and the abutted member can be kept in a constant distance relationship. it can. Thereby, a stable captured image suitable for inspection can be obtained, and inspection accuracy can be further improved.

  The harness holding member includes 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 guarantee 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 from the support main body. By bringing the contact member into contact with the harness support main body member, the distance between the imaging unit and the inspection target part can be kept as predetermined as possible. Thereby, a stable captured image suitable for inspection can be obtained, and inspection accuracy can be further improved.

  Further, the position information providing 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 provided on the contact member. An identification mark image that has a mark reading portion that 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, and is read by the mark reading portion If the inspection target part is specified based on the above, it is convenient because the inspection target part can be imaged while the contact member is brought into contact with the contacted part and the identification mark is read by the mark reading part.

  The position information adding unit is an identification mark that is provided in association with each of the inspection target parts, and is provided at a position that can be imaged through the imaging unit together with the corresponding inspection target part. Since the inspection target part can be specified by imaging the inspection target part based on the identification mark image in the captured image captured through the imaging unit, the inspection target part can be specified. Convenient.

  Further, according to the appearance inspection method for a wire harness of the present invention, it is an appearance inspection method for a wire harness that performs an appearance inspection of a wire harness having a plurality of inspection target portions, and is associated with each of the inspection target portions of the wire harness. A step of providing a position information adding unit; a step of storing inspection information in which reference inspection data is associated with each inspection target part; and a step of imaging each inspection target part by an imaging unit; A step of specifying an examination target region based on information obtained from the unit, and when a captured image is obtained through the imaging unit, reference examination data based on the examination target region identified by the position specifying unit and the examination information And based on the identified reference inspection data and the captured image obtained through the imaging unit, Because and a step of determining the inspection acceptance in 査 target site, can maintain the appearance inspection accuracy of the wire harness constant.

  Moreover, when there is a change in the wire harness, the installation position of the position information adding unit is changed, or added or deleted, and the correspondence between each inspection target part and the reference inspection data in the inspection information is changed. Can be dealt with. Therefore, the change of the wire harness can be dealt with relatively easily.

  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.

{First embodiment}
The wire harness appearance inspection apparatus and appearance inspection method according to the first embodiment will be described.

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

  The wire harness 10 is a wiring member that is assembled to a vehicle along a wire harness wiring path provided in a component member of the vehicle and connects various electric devices mounted on the vehicle.

  The wire harness 10 is configured by binding a plurality of wiring members 12 such as electric wires while appropriately branching them. The binding of the wiring members 12 is performed using the 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 for connecting an electrical device or the like is appropriately attached to each end of the wire harness 10 (see FIG. 3). This wire harness 10 has attachment parts, such as these adhesive tapes 13, fixtures, and connectors 14, as a plurality of inspection object parts. And the appearance inspection apparatus and appearance inspection method of this wire harness are the presence or absence and attachment classification (color, shape, etc.) of the adhesive tape 13, the fixture, the connector 14, etc. with respect to these inspection target parts in the wire harness 10. Perform the inspection.

  Further, the harness holding member 20 includes a harness support main body portion 22 and a plurality of harness support pillar portions 24.

  The harness support main body portion 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. But the harness support main-body part 22 does not necessarily need to be plate shape, The frame structure comprised by the some elongate rod-shaped member may be sufficient.

  The harness support column part 24 is a member erected on the harness support body part 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 the 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 column portion 24, the wire harness 10 is held in a predetermined deployed form at a position above the harness support main body portion 22.

  The harness holding member 20 may be for assembling the wire harness 10 thereabove, or the wire harness 10 assembled in another place is set on the harness holding member 20. May be 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 attachment portion of the adhesive tape 13 in the wire harness 10 as an inspection target portion, and FIG. 3 shows an appearance in which the attachment portion of the connector 14 in the wire harness 10 is an inspection target. It shows the state of performing the inspection.

  The appearance inspection apparatus includes the harness holding member 20, the position information providing unit 30, the position information acquisition unit 32 and the position determination unit 52 as a position specifying unit, the imaging unit 40, the storage unit 56, and an inspection pass / fail determination. Part 54.

  The position information providing 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 site 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.

  For example, the following configuration is adopted as the position information adding unit 30 and the position information acquiring unit 32. For example, a configuration in which an identification mark such as a character, a symbol, or a figure (including a barcode) is attached to the harness support body 22 or the harness support pillar 24 as the position information adding unit 30 and the position information acquisition unit 32 is used. A camera, a reader device, a touch pen device, or the like that can read the identification mark 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 information from the RF tag is used as the position information acquiring unit 32. In the configuration using the RF tag and its reader device, when the reader device is integrated with the imaging unit 40 and the inspection target position is imaged by the imaging unit 40 as described later, only 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 communication is possible.

  That is, the position information adding unit 30 can employ a configuration that can set predetermined information by various methods, and the position information acquisition unit 32 can have various types of information that can read predetermined information according to the setting method. A configuration can be employed.

  Among 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 acquisition 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 a region to be examined is shared as the position information acquiring unit 32 will be described as a modification.

  The imaging unit 40 is configured to be able to image each examination target part. 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 device 50 (to be described later) in a wired or wireless manner so as to be communicable. The imaging unit 40 can be moved and freely changed in posture by a worker or the like. Thus, the operator can move the imaging unit 40 and move the imaging unit 40 through the imaging unit 40 in order to sequentially image each examination target region.

  Each function as the position determination unit 52, the inspection pass / fail determination unit 54, and the storage unit 56 is incorporated in the inspection processing device 50. The inspection processing device 50 is a general computer device that includes 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 as 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.

  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 the examination target site based on the information. Then, the inspection target part specifying information is given to the inspection acceptance / rejection determination unit 54.

  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 portion around which the adhesive tape 13 of a predetermined color is wound is data indicating the minimum area where the presence of the predetermined color is required. Further, for example, the reference data relating to the inspection target part to which the connector 14 having a predetermined color and a predetermined shape is connected corresponds to data indicating the minimum area where the predetermined color is required and the outer shape of the connector 14. Reference pattern data.

  When a captured image is obtained through the imaging unit 40, the inspection acceptance / rejection determination unit 54 specifies reference inspection data used for the acceptance determination based on the inspection target part specified by the position determination unit 52 and the inspection information. . And based on the specified reference | standard test | inspection data and the captured image obtained through the imaging part 40, the pass / fail of the test | inspection in the test target site | part used as the imaging target is determined.

  For example, as an inspection related to an inspection target part 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, and the area of the area is It is determined whether or not it exceeds the minimum area, and when it exceeds the area, it is determined that it is acceptable. That is, when the correct color adhesive tape 13 is wound around the site to be inspected, it is determined that the test is successful.

  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), in the captured image obtained through the imaging unit 40 as described above, the area of the predetermined color is the lowest. It is determined whether or not it is determined whether or not it exceeds the limited area. In addition, a 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. That is, when the correct shape and the correct color connector 14 (that is, the correct type of connector) is attached to the site to be inspected, a pass determination is made.

  Then, the pass / fail determination results of these inspection pass / fail determination units 54 are output to the pass / fail determination 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 so that the operator can recognize it. Then, the operator can recognize the pass / fail of each inspection target part through the pass / fail determination output unit 58.

  An inspection method using the thus configured wire harness inspection device will be described.

  First, the harness holding member 20 is provided with the position information providing unit 30 in association with each inspection target part of the wire harness 10. Each position information adding unit 30 is set with a unique identification code.

  Then, the inspection information in which the reference inspection data is associated with each inspection object part is set and registered in the storage unit 56. Here, it is preferable that the reference inspection data corresponding to the inspection target region is preset with a reference color, area, reference pattern, and the like corresponding to the parts attached to the inspection target region. When the reference inspection data is associated with each inspection object part, it is preferable that the preset reference data can be selected and set. Thereby, it is possible to reduce the necessity of newly creating reference inspection data every time the wire harness 10 is changed, and it is possible to more easily cope with the change of the wire harness 10. However, even in this case, it is necessary to newly create reference inspection data for an inspection target part or the like that adopts a new part or the like.

  And when inspecting the wire harness 10, an operator picks up each imaging | photography site | part with the said imaging part 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. The reference inspection data is specified based on the above. 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 part that is the imaging target is determined, and the pass / fail determination result is passed through the pass / fail determination output unit 58. Informed. Thereby, the operator can know the pass / fail status of the inspection target part.

  The operator then performs the same operation as described above for the other inspection target parts. Thereby, the external appearance test | inspection in each test object site | part of the wire harness 10 can be performed.

  Moreover, when there is a change such as a type change or a design change with respect to the wire harness 10, it is dealt with as follows.

  First, when the position of the inspection target part is changed while the attachment 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.

  Next, when the inspection target part is deleted, the corresponding position information adding unit 30 is deleted, and the registration information related to the inspection target part that is the deletion target is deleted from the inspection information in the storage unit 56. .

  In addition, when an inspection target part is added, the position information adding unit 30 is additionally disposed at a position corresponding to the added inspection target part, and the inspection information in the storage unit 56 becomes an additional target. Reference data for pass / fail judgment is set in association with information on the part to be examined.

  By these measures, the appearance inspection can be performed as before.

  According to the appearance inspection device and the appearance inspection method of the wire harness 10 configured as described above, when a captured image is obtained through the imaging unit 40, the reference is based on the inspection target portion specified by the position determination unit 52 and the inspection information. Since the inspection data is specified and the inspection pass / fail at the inspection target part is determined based on the reference inspection data and the captured image, the appearance inspection accuracy of the wire harness 10 can be maintained constant compared with the visual inspection.

  Moreover, when there is a change in the wire harness 10, 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. it can. Therefore, as compared with the conventional case where the inspection object range and teaching data are changed, the change of the wire harness can be handled relatively easily.

  Moreover, since the imaging part 40 images one site | part to be examined, a thing with comparatively low resolution can be used and it also leads to cost reduction.

{Second Embodiment}
Next, a wire harness visual inspection apparatus and visual inspection method according to a second embodiment of the present invention will be described. In addition, about the component common to the said embodiment, such as the wire harness 10 used as a test object, the harness holding member 20, etc., the same code | symbol is attached | subjected and the description is abbreviate | 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, an imaging unit 140, and a storage unit 154. And an inspection acceptance / rejection determination unit 153a. In addition, this appearance inspection apparatus is integrated with the contacted 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. And a contact member 164 provided.

  That is, the abutted member 160 is attached to one of the harness support pillars 24 that is associated with the inspection target site (usually in the vicinity of the inspection target site). The abutted member 160 is formed in a substantially rectangular parallelepiped block shape, with one end thereof extending toward the side of the harness support pillar 24 and the other end of the abutted member 160 being harness-supported. It is attached to the column part 24. At this time, the upper surface of the side portion of the harness support pillar 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 so. And the contact member 164 can be contact | abutted and the identification mark part 130 is provided in the upper surface of the part extended to the side among the harness support pillar parts 24. As shown in FIG.

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

  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 part in a substantially rectangular parallelepiped casing 142, and is provided at one side of the imaging unit 140. The contact member 164 is integrated. The contact member 164 is formed in a rod shape (here, a prismatic member) that extends in the imaging direction (here, downward) 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 is positioned at a predetermined position above the contact member 164, that is, the corresponding inspection. It is configured to be disposed at a position a predetermined distance above the target part.

  In addition, a position information acquisition camera 132 is provided at the tip of the contacted member 160. The position information acquisition camera 132 is configured by a CCD, a CMOS, or the like. And when the front-end | tip part of the contact member 164 contacts the upper surface of the side extension part of the said contact member 164, the structure 132 reads the identification mark part 130 attached | subjected to the upper surface of the position information acquisition camera. It has become.

  Then, the operator grasps the integrated imaging unit 140 and the contact member 164, and arranges the imaging unit 140 above the inspection target part, while the side of the contacted member 160 corresponding to the inspection target part. The front end portion of the contact member 164 is brought into contact with the upper surface of the extending portion. Then, the position information acquisition camera 132 reads the identification mark part 130, and the imaging part 140 can image the examination target part as shown in FIG. At this time, the contact member 164 and the contacted member 160 guarantee 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). Therefore, the examination target part is imaged by the imaging unit 140 at a constant 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 or mouse, and is used to input various commands and settings to the processing device main body 152.

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

  The processing device 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. The position determination unit 153b performs a process of specifying an examination target part based on an image read by the position information acquisition camera 132 and various setting information stored in the storage unit 154 according to the control program. Further, the inspection pass / fail determination unit 153a performs a process of determining the pass / fail of the appearance inspection in the inspection target part based on the specified inspection target part and various setting information in the storage unit 154 according to the control program.

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

  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 or the like as data that can be processed. Further, 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 illustrated 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, unique identification codes “P001”, “P002”, “P003”, “P004”,... Also, identification codes “T001”, “T002”, “T003”,... Then, the examination type “T001” 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 “P004”. Is associated with the inspection type “T003”. Here, the same inspection type “T002” is associated with the inspection target parts “P001” and “P002” when the same parts (adhesive tape or connector) are attached to the inspection target parts. This is because it is assumed.

  For the inspection types “T001”, “T002”, and “T003”, as shown in FIG. 8, inspection contents are set and registered in advance and stored in the storage unit 154. That is, for the inspection type “T001”, the setting registration for performing the color inspection 1 and the shape inspection 1 is registered. In addition, for the inspection type “T002”, setting registration for performing color inspection 2 is registered. In the color inspection 1 and the color inspection 2, for example, an area of a predetermined color set from a captured image obtained through the imaging unit 140 is extracted (see an area with diagonal lines in FIG. 6), and the area of the area is set. This is an inspection for determining whether or not the minimum area is exceeded. The shape inspection 1 is an inspection in which a pattern search is performed on the captured image based on the reference pattern to determine whether or not a pattern within a predetermined approximate range from the reference pattern is searched. The processing contents of the above-described appearance inspection are only examples, and as the appearance inspection method based on the captured image of the inspection target part, various image processing such as a method of defining a defective pattern and extracting the defective pattern is used. Can be employed.

  In this embodiment, information (see FIG. 7) that associates the examination type with each examination target part, and information that associates examination contents with examination types “T001”, “T002”, and “T003” (see FIG. 8). Separately. This is because by selecting and setting the examination type for each examination target part, the operation of individually registering the examination contents is omitted, so that the setting can be easily performed.

  For the above, the inspection content for the inspection types “T001”, “T002”, and “T003” depends on the parts (color of adhesive tape, color of connector, shape, etc.) attached to each inspection target part It is preferable that the setting is registered in advance. Then, when associating the examination type with each examination target part, it is preferable that the examination type can be selected and set from the existing examination types. However, when an unexpected part, a new part, or the like is used, the inspection contents for the inspection types “T001”, “T002”, and “T003” 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 the appearance inspection result displayed on the display unit 159 is shown in FIG. As shown in the figure, the pass / fail result for each inspection result target part is indicated by “◯” or “−”. “O” means that the inspection result is acceptable, and “-” means that the inspection is unsuccessful or unacceptable (that is, the state is not acceptable). Further, when all the inspection target parts have passed, a message to that effect is displayed. Here, “◯” is displayed in the column indicating the overall acceptance / rejection to indicate that all the inspection target parts have passed. Therefore, by confirming the display, the operator can confirm whether or not all the inspection target parts of the wire harness 10 have passed. Moreover, in the 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. .

  An appearance inspection method using the appearance inspection apparatus of the wire harness will be described together with the operation of the appearance inspection apparatus. FIG. 10 is a flowchart showing the operation of the wire harness appearance inspection apparatus.

  First, as shown in FIGS. 7 and 8, inspection information in which reference inspection data is associated with each inspection target 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.

  Then, an appearance inspection is started. That is, the operator holds the imaging unit 140 with his hand and disposes the imaging unit 140 above the inspection target part, while the laterally extending portion upper surface of the contacted member 160 corresponding to the inspection target part The tip of the contact member 164 is brought into contact with the contact member 164. Then, the identification mark unit 130 is read by the position information acquisition camera 132 and an 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 inspected. It is given to the processing device 150.

  Then, as shown in step S1, the inspection processing apparatus 150 attempts to specify inspection target portions “P001”, “P002”, “P003”, “P004”,... Based on the image of the identification mark unit 130. 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”, “T003”,... (Examination reference data) are identified based on the identified examination target part and the setting information shown in FIGS.

  In the next step S <b> 3, 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, when the component 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, the display result on the display unit 159 is updated, and the next Proceed to step S4. On the other hand, when a part in the inspection target part is not mounted or inappropriate, or when 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 pass / fail of the appearance inspection again based on another captured image by the imaging unit 140. That is, continuous images (moving images or still images every predetermined time) are obtained by the imaging unit 140, and the inspection processing apparatus 150 sequentially captures images captured by the imaging unit 140 until the appearance inspection passes. The pass / fail of the appearance inspection is determined based on the above. Thereby, when a predetermined part is appropriately mounted in the inspection target part, if the operator appropriately adjusts the position and posture of the imaging unit 140, a pass determination is made someday. ing. Then, if the inspection target part where the component is properly mounted is reflected in the captured image as a result of the adjustment, a pass determination is made.

  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 inspection has been completed 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.

  Moreover, when there is a change such as a type change or a design change with respect to the wire harness 10, the position of the contacted member 160 is changed, added, or deleted according to the changed inspection target part, and the identification mark portion 130 is repositioned, added, or deleted. Further, as described above, the inspection target portions “P001”, “P002”, “P003”, “P004”... In FIG. Change, add, or delete T002 "," T003 ". Furthermore, the inspection contents of the inspection types shown in FIG. 8 are appropriately changed, added, or deleted as necessary. In this way, according to the changed wire harness 10, inspection information in which the reference inspection data is associated with each inspection target part is set.

  As described above, by changing the position of the abutted member 160 and the identification mark portion 130 and changing the reference inspection data associated with each inspection target portion, the appearance inspection is also performed on the changed wire harness 10. It can be performed.

  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.

  In addition, since the abutting member 160 provided on the harness support column portion 24 as a position assurance member and the abutting member 164 provided integrally with the imaging unit 140 are provided, the tip of the abutting member 160 is provided. By bringing the part into contact with the contact member 164, the distance between the imaging unit 140 and the inspection target part can be kept as constant as possible. Thereby, it is possible to obtain a more stable captured image obtained by imaging the inspection target part with a certain size (angle of view), and to improve the inspection accuracy.

  In addition, 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 relationship between the inspection target part and the imaging unit 140 in the horizontal direction, if the distance between the inspection target part and the imaging unit 140 is constant, the operator may move the imaging unit 140 as appropriate to capture the inspection target part someday. This is because it can be expected to be possible, and if the region to be inspected has been imaged, it can be dealt with so that the appearance inspection can be easily performed by translating or rotating the captured image or the reference pattern.

  In addition, in the present embodiment, the contact mark 160 is provided with the identification mark portion 130 as the position information providing portion, the position information acquisition camera 132 is provided at the distal end portion of the contact member 164, and the contact member 164 is covered. While the position of the imaging unit 140 is guaranteed by being in contact with the contact member 160, the identification mark unit 130 is read by the position information acquisition camera 132, and the inspection target part is specified based on the read result. . For this reason, it is convenient because the inspection target part can be specified while performing position assurance and imaging the inspection target part.

{Modifications}
In the second embodiment, the contact member 160 is provided on the harness support pillar 24 and the position of the imaging unit 140 is assured by contacting the contact member 160 with the tip of the contact member 164. However, the configuration for ensuring the position is not necessarily limited to the above example. For example, as shown in FIG. 11, the contact member 164 is formed as a longer contact member 264, the contacted member 160 is omitted, and the contact member 264 is brought into contact with the harness support body 22. May be. Even in this case, the distance between the imaging unit 140 and the site to be inspected can be made as constant as possible, assuming that the wire harness 10 is held at a substantially predetermined height position with respect to the harness support body 22. .

  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.

  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 inspection target is based on the captured image of the imaging unit 140 for imaging the inspection target region. The position may be specified.

  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 where the corresponding inspection target part is imaged together with the inspection target part when imaging is performed from above.

  Then, when the imaging unit 140 images the inspection target position, a captured image including the image of the inspection target part and the image of the identification mark unit 330 is obtained as shown in FIG. Is to be given to. 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.

  In this modification, since the inspection target position is specified based on the captured image of the imaging unit 140 for imaging the inspection target region, there is an advantage that the configuration can be simplified.

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

  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, a distance measurement unit using a laser beam or the like is incorporated in the imaging unit 140, and 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 body unit 22 is a predetermined distance. The configuration for determining whether the visual inspection is acceptable or not can also be used as the position assurance member.

  In addition, tilt correction processing may be performed on the captured images obtained by the imaging units 40 and 140. Thereby, even if it is a case where the image pick-up parts 40 and 140 are imaged with the attitude | position inclined from the test object site | part, a more exact external appearance inspection can be performed.

  In each of the embodiments, the wire harness 10 has been described as an example for a vehicle that is assembled to a vehicle. However, in addition to the wire harness that is used as a wiring member in various devices on which electric components are mounted. Applicable.

It is a top view which shows the state by which the wire harness used as a test object was set on the harness holding member. It is a block diagram which shows the external appearance inspection apparatus of the wire harness which concerns on 1st Embodiment. It is a figure which shows the state which performs an external appearance test | inspection for the attachment part of a connector among wire harnesses as a test object. It is a block diagram which shows the external appearance inspection apparatus of the wire harness which concerns on 2nd Embodiment. It is a figure which shows the state which test | inspects a test object site | part by the same external appearance inspection apparatus. It is a figure which shows the example of the captured image of the site | part to be examined by an imaging part. It is a figure which shows the example of the content which matched the test classification to each test object part. It is a figure which shows the example which registered the content of the test | inspection in the test | inspection type. It is a figure which shows the example of a display of an external appearance test result. It is a flowchart which shows operation | movement of the external appearance inspection apparatus of a wire harness. It is a figure which shows the modification of the external appearance inspection apparatus of a wire harness. It is a figure which shows the other modification of the external appearance inspection apparatus of a wire harness. It is a figure which shows the captured image example in the modification same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wire harness 13 Adhesive tape 14 Connector 20 Harness holding member 22 Harness support main-body part 24 Harness support pillar part 30 Position information provision part 32 Position information acquisition part 40 Imaging part 50 Inspection processing apparatus 52 Position discrimination | determination part 54 Inspection pass / fail determination part 56 Memory | storage Unit 58 pass / fail judgment output unit 130, 230, 330 identification mark unit 132 position information acquisition camera 140 imaging unit 150 inspection processing unit 152 processing unit main unit 153 CPU
153a Inspection pass / fail determination unit 153b Position determination unit 154 Storage unit 159 Display unit 160 Contacted member 164, 264 Contact member

Claims (7)

An appearance inspection apparatus for a wire harness that performs an appearance 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 sites 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;
When a captured image is obtained through the imaging unit, reference inspection data is specified based on the inspection target part specified by the position specifying unit and the inspection information, and is obtained through the specified reference inspection data and the imaging unit. A pass / fail determination unit that determines pass / fail of the inspection in the inspection target portion that is the imaging target based on the captured image;
Wire harness appearance inspection device with An appearance inspection apparatus for a wire harness 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. A wire harness appearance inspection device according to claim 2,
The harness holding member has 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 an upper position of the harness support 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, and abutting on the abutted member and disposing the imaging unit at a predetermined distance from the abutted member;
A visual inspection apparatus for a wire harness. A wire harness appearance inspection device according to claim 2,
The harness holding member has 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 an upper position of 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 arranges the imaging unit at a predetermined height position from the support main body. , Wire harness appearance inspection device. A wire harness appearance 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 main body unit in association with each inspection target site,
The position specifying unit includes a mark reading unit that is provided on the contact member and is capable of reading the identification mark in a state where the contact member is in contact with the contacted member or the harness support main body. An appearance inspection apparatus for a wire harness that specifies a region to be inspected based on an identification mark image read by the mark reading unit. It is an external appearance inspection apparatus of the wire harness in any one of Claims 1-4,
The position information providing unit is an identification mark that is provided in association with each inspection target part, and is provided at a position that can be imaged through the imaging unit together with the corresponding inspection target part,
The said position specific | specification part is an external appearance inspection apparatus of a wire harness which specifies a test object site | part based on the identification mark image in the captured image imaged through the said imaging part. It is an appearance inspection method of a wire harness that performs an appearance inspection of a wire harness having a plurality of inspection target parts,
A step of providing a position information providing unit in association with each inspection target part of the wire harness;
Storing the inspection information in which the reference inspection data is associated with each inspection target part in a storage unit;
While imaging each said inspection object part with an image pick-up part, specifying a test object part based on information obtained from said position information grant part,
When a captured image is obtained through the imaging unit, reference inspection data is specified based on the inspection target part specified by the position specifying unit and the inspection information, and is obtained through the specified reference inspection data and the imaging unit. A step of determining pass / fail of the inspection in the inspection target portion that is the imaging target based on the captured image to be captured;
Appearance inspection method of the equipped wire harness.

Images