JP7310172B2 - Wire harness inspection device and wire harness inspection method - Google Patents

Description

The present disclosure relates to a wire harness inspection device and a wire harness inspection method.

Mobile objects such as vehicles and aircraft are equipped with wire harnesses. A wire harness includes a plurality of bundled electric wires. Each wire carries power, electrical signals, and the like.
Patent Literature 1 discloses a technique for attaching an RFID tag to each electric wire. By reading the RFID tag and comparing it with the design data, the user can confirm whether or not the electric wire has been connected correctly.

JP 2009-273347 A

It is necessary to inspect the wiring harness and confirm whether the wiring harness has a plurality of electric wires, not too many or not enough. As an inspection method, as described in Patent Document 1, a method of attaching an RFID tag to the end of each electric wire, reading the RFID tag, and collating it with a list is conceivable.

However, it takes a lot of labor and time to read many RFID tags one by one. An object of one aspect of the present disclosure is to provide a wire harness inspection device and a wire harness inspection method that can easily inspect a wire harness.

One aspect of the present disclosure is a wire harness inspection device that inspects a wire harness including a plurality of electric wires. The wire harness inspection apparatus includes a placement unit on which the wire harness having the RFID tag attached to the ends of the plurality of electric wires can be placed, a guide indicating a placement position of the wire harness in the placement unit, and the an RFID reader capable of reading identification information of an RFID tag; a moving unit configured to change a relative position of the RFID reader with respect to the mounting unit; and using the moving unit to change the relative position. an information acquisition unit configured to acquire information of a combination of the identification information and the location information of the RFID tag by reading the identification information using the RFID reader while changing; The information on the combination acquired by the unit is compared with the information on the combination when the wire harness includes the plurality of electric wires in just the right amount and the ends of the plurality of electric wires are in correct positions. and a comparison unit, and based on the comparison result of the comparison unit, it is determined whether the wire harness includes the plurality of electric wires in just the right amount and whether the ends of the plurality of electric wires are in correct positions. and a determined determination unit.

By using the wire harness inspection apparatus according to one aspect of the present disclosure, the wire harness can be easily inspected.
Another aspect of the present disclosure is a wire harness inspection method for inspecting a wire harness including a plurality of electric wires. In the wire harness inspection method, the wire harness having the RFID tag attached to the ends of the plurality of electric wires is placed on a placement unit according to a guide indicating the placement position of the wire harness, and the identification information of the RFID tag is placed on the placement unit. By reading the identification information using the RFID reader while changing the relative position of the RFID reader that can read the RFID reader, the combination of the identification information and the position information of the RFID tag and comparing the obtained information of the combination with the information of the combination when the wire harness includes the plurality of electric wires without excess or deficiency and the ends of the plurality of electric wires are in correct positions. and determining whether or not the wire harness includes the plurality of wires in just the right amount, and whether the ends of the plurality of wires are in correct positions, based on the comparison result.

Using the wire harness inspection method, which is another aspect of the present disclosure, the wire harness can be easily inspected.

1 is a block diagram showing a configuration of a wire harness inspection device; FIG. 3 is a block diagram showing a functional configuration of a controller 3; FIG. 3 is a perspective view showing the configuration of the placing unit 5; FIG. 3 is a plan view showing the configuration of the placing unit 5; FIG. 4 is a plan view showing the configuration of the mounting unit 5 and the wire harness 39 mounted thereon. FIG. 4 is a flowchart showing processing executed by the wire harness inspection apparatus 1; FIG. 5 is an explanatory diagram showing an example of combination information; It is explanatory drawing showing the example of normal time information.

Exemplary embodiments of the present disclosure are described with reference to the drawings.
<First embodiment>
1. Configuration of Wire Harness Inspection Apparatus 1 The configuration of the wire harness inspection apparatus 1 will be described with reference to FIGS. 1 to 5. FIG. As shown in FIG. 1, the wire harness inspection apparatus 1 includes a control unit 3, a placement unit 5, an RFID reader 7, a moving unit 9, a display 11, an input unit 13, and a database 14. .

The control unit 3 is mainly composed of a well-known microcomputer having a CPU 15 and a semiconductor memory such as RAM, ROM, flash memory (hereinafter referred to as memory 17). Various functions of the control unit 3 are realized by the CPU 15 executing programs stored in a nonvolatile storage medium. In this example, the memory 17 corresponds to a nonvolatile storage medium storing programs. Also, by executing this program, a method corresponding to the program is executed. Note that the number of microcomputers that constitute the control unit 3 may be one or more.

As shown in FIG. 2, the control unit 3 includes a result output unit 19, an information acquisition unit 21, a comparison unit 23, a determination unit 25, and a and a guide display unit 27 .

Some or all of the functions of the control unit 3 may be implemented in hardware using one or more ICs or the like. Also, the control device may have hardware such as an electronic circuit instead of or in addition to the computer. The electronic circuitry may include at least one of digital circuitry and analog circuitry.

As shown in FIG. 3 , the mounting unit 5 is a desk-like member having a top plate 29 and a plurality of legs 31 . The top plate 29 is a long member elongated along the longitudinal direction L in FIG. The longitudinal direction L is also the longitudinal direction of a wire harness 39 to be mounted on the mounting unit 5 and described later. As shown in FIGS. 3 and 4, a plurality of image display units 33 are attached to the top surface of the top plate 29 . The image display unit 33 is a display capable of displaying images. Examples of the image display unit 33 include a liquid crystal display, an organic EL display, a projector, and a screen. Also, the image display section 33 may be a sheet of paper on which an image is displayed.

The RFID reader 7 is a member capable of reading the identification information of the RFID tag 55 . As shown in FIG. 5, RFID reader 7 is arranged above top plate 29 . The RFID reader 7 can read the identification information of the RFID tag 55 present on the top plate 29 .

Note that the RFID reader 7 may be arranged in the space below the top plate 29 . When the RFID reader 7 is arranged in the space below the top plate 29 , it becomes easier to secure the working space above the top plate 29 .

A range of the upper surface of the top plate 29 in which the RFID reader 7 can read the identification information of the RFID tag 55 at one time is referred to as a readable range 35, as shown in FIG. The readable range 35 has a certain shape and width. The position of the readable range 35 and the position of the RFID reader 7 have a certain relationship. Therefore, when the RFID reader 7 moves, the readable range 35 also moves. The readable range 35 has a predetermined width in the longitudinal direction L. As shown in FIG. Its width is sufficiently smaller than the length in the longitudinal direction L of the top plate 29 . The readable range 35 covers the entire width of the top plate 29 in a direction perpendicular to the longitudinal direction L (hereinafter referred to as a lateral direction W).

The moving unit 9 can move the RFID reader 7 along the longitudinal direction L. As shown in FIG. When the moving unit 9 moves the RFID reader 7, the relative position of the readable range 35 with respect to the top plate 29 (hereinafter referred to as reading position) changes.

The display 11 can display images and the like. The input unit 13 receives an input operation by the user. The database 14 stores normal information, which will be described later.
2. Processes Executed by Wire Harness Inspection Apparatus 1 Processes executed by the wire harness inspection apparatus 1 will be described with reference to FIGS. 1 to 8. FIG. In step 1 (S1) of FIG. 6, the guide display unit 27 determines whether or not the user has input a guide display to the input unit 13 . If there is an input for guide display, the process proceeds to step 2 (S2). If there is no guide display input, the process returns to before step 1 (S1).

In step 2 (S2), the guide display unit 27 displays the guide 37 on the image display section 33 as shown in FIG. The guide 37 is based on user input. The guide 37 is a display indicating the placement position of the wire harness 39 to be placed on the image display section 33 later. The guide 37 represents the shape of the wire harness 39 .

At this time, the user can place the wire harness 39 on the top plate 29 as shown in FIG. The wire harness 39 includes a plurality of bundled electric wires. In the example shown in FIG. 5, the wire harness 39 includes a main line 41 and a plurality of branch lines 43, 45, 47, 49, 51, 53. The trunk line 41 is a portion where all electric wires are bundled. Branch lines 43 , 45 , 47 , 49 , 51 , 53 are portions branched from trunk line 41 .

An RFID tag 55 is attached to the end of each wire. The identification information stored in the RFID tag 55 differs from RFID tag 55 to RFID tag 55 . The correspondence relationship between each electric wire and the RFID tag 55 attached thereto is determined in advance.

By placing the wire harness 39 so that the guide 37 and the wire harness 39 overlap, the user can place the wire harness 39 at the correct position (hereinafter referred to as normal position) in the placing unit 5. can.

When the wire harness 39 is in the normal position, the positions of the ends of the electric wires are predetermined positions. In the example shown in FIG. 5, the end of branch line 43 is in region A, the end of branch line 45 is in region B, the end of branch line 47 is in region C, and the end of branch line 49 is in region C. It is in region D, the end of branch line 51 is in region E, and the end of branch line 53 is in region F. Areas A to F are areas occupying part of the top plate 29, respectively. The positions of the regions A to F in the longitudinal direction L are different for each region.

Returning to FIG. 6, in step 3 (S3), the information acquisition unit 21 determines whether or not the user has input to the input unit 13 whether or not the user has input execution of the inspection. If there is an input to execute inspection, the process proceeds to step 4 (S4). If there is no input for inspection execution, the process returns to before step 3 (S4).

In step 4 ( S<b>4 ), the information acquisition unit 21 reads the identification information of the RFID tag 55 using the RFID reader 7 while changing the position of the RFID reader 7 using the moving unit 9 . The information acquisition unit 21 moves the RFID reader 7 so that the identification information of all the RFID tags 55 provided on the wire harness 39 can be read.

Also, the information acquisition unit 21 acquires position information of each RFID tag 55 . The positional information of the RFID tag 55 is information representing the relative position of the RFID tag 55 with respect to the top plate 29 . The positional information of the RFID tag 55 is positional information defined by coordinates in the longitudinal direction L. FIG.

The information acquisition unit 21 can acquire the position information of the RFID tag 55 as follows. First, the information acquisition unit 21 acquires the position information of the RFID reader 7 when the identification information of the RFID tag 55 is read. Next, the information acquisition unit 21 calculates the reading position from the position information of the RFID reader 7 . As described above, since the reading position and the position of the RFID reader 7 have a certain relationship, the information acquisition unit 21 can calculate the reading position from the position of the RFID reader 7 . Since the RFID tag 55 whose identification information has been read is at the reading position, the information acquisition unit 21 uses the information representing the reading position as the position information of the RFID tag 55 .

The information acquisition unit 21 acquires combination information (hereinafter referred to as combination information) of the identification information and the position information of the RFID tag 55 for all the RFID tags 55 included in the wire harness 39 .

Examples of combination information are shown in FIG. In this example, the combination information includes identification information I1-I20. The combination information also includes position information P1 to P20 of the RFID tag 55 corresponding to each piece of identification information. For example, the location information of RFID tag 55 having identification information I1 is P1.
Returning to FIG. 6, in step 5 (S5), the comparison unit 23 compares the combination information acquired in step 4 (S4) with the normal information stored in the database 14, and the following J1 to J3 is satisfied or not.

The normal information is combined information when the wire harness 39 has a plurality of electric wires in just the right amount, the RFID tag 55 is correctly attached to the end of each electric wire, and the wire harness 39 is placed in a normal position. .

FIG. 8 shows an example of normal information. In this example, the normal information includes identification information I1 to I20. In addition, the normal information includes position information of the RFID tag 55 corresponding to each piece of identification information. In the example shown in FIG. 8, the positional information of the RFID tag 55 is information representing the position of any one of the areas A to F shown in FIG. For example, the location information of the RFID tag 55 having the identification information I1 is information representing the area C. FIG.

J1: All the identification information included in the combination information is also included in the normal information.
J2: All the identification information included in the normal information is also included in the combination information.
J3: Let x be the position of the RFID tag 55 corresponding to the identification information included in the combination information. Let region X be the position of the same RFID tag 55 in the normal state information. Position x is included in region X for all pieces of identification information included in the combination information.

It should be noted that the case where all of J1 to J3 are satisfied means that the ends of all wires are in correct positions and there are no redundant wires. The case where J1 is not satisfied is the case where the wire harness 39 includes an extra wire end. The case where J2 is not satisfied means the case where the end of the wire which is originally required is missing. A case where J3 is not satisfied is a case where at least some of the ends of the wires are in positions different from the correct positions. The correct position is the position of the end when the wire harness 39 is manufactured correctly.

In step 6 (S6), the determination unit 25 determines whether the wire harness 39 is normal based on the comparison result in step 5 (S5). Specifically, the determination unit 25 determines that the wire harness 39 is normal when all of J1 to J3 are satisfied, and determines that the wire harness 39 is normal when even one of J1 to J3 is not satisfied. is not normal.

In step 7 (S7), the result output unit 19 outputs the determination result of step 6 (S6) and related information to the display 11. FIG. A display 11 displays the determination results and related information. Note that the result output unit 19 may output the determination result of step 6 ( S<b>6 ) and related information to the image display section 33 .

If J1 is not satisfied, there is identification information that is included in the normal information but not included in the combination information as related information. If J2 is not satisfied, there is identification information that is included in the combination information but not in the normal information as related information. If J3 is not satisfied, relevant information includes information representing a position x not included in region X and the RFID tag 55 present at that position x.

Information related to the case where J1 is not satisfied includes information representing an area where wires are lacking. The result output unit 19 may visibly display the area where the electric wire is insufficient on the image display unit 33 based on the position information of the RFID tag 55 included in the normal information. As a mode for visually displaying an area lacking electric wires on the image display unit 33, a frame surrounding the area lacking electric wires may be displayed, or the area lacking electric wires may be displayed in a different color. A mode in which a color different from that of the region is used is exemplified.

The result output unit 19 may display the identification information of the missing electric wire near the area where the electric wire is insufficient based on the normal information.
Related information when J2 is not satisfied is information representing the area where extra wires are arranged. The result output unit 19 may visibly display the area where extra wires are arranged on the image display unit 33 based on the position information of the RFID tag 55 included in the combination information.
The result output unit 19 may display the identification information of the redundant wires near the area where the redundant wires are arranged based on the combined information.

Related information when J3 is not satisfied includes information representing the area where the wire is incorrectly placed and the area where the wire is originally placed. The result output unit 19 determines the position information of the RFID tag 55 included in the normal time information and the position information of the RFID tag 55 included in the combination information for the area where the electric wire is erroneously arranged and the area where the electric wire should be arranged. may be visibly displayed on the image display unit 33 based on the above.
The result output unit 19 displays an image of the identification information of the electric wire corresponding to the area where the electric wire is incorrectly arranged, the area where the electric wire should be originally arranged, or both areas, based on the combination information or the normal information. It may be displayed in section 33 .

The result output unit 19 may display, on the image display section 33, a display object for distinguishing between the area where the wire is incorrectly arranged and the area where the wire should be arranged. Examples of display items include an arrow or the like pointing from the area where the wires are incorrectly arranged to the area where the wires are supposed to be arranged. This display allows the user to understand from which area to which area the electric wire should be moved.

For example, after completing step 7 (S7), the wire harness inspection apparatus 1 can return to step 1 (S1) and wait for an input of guide display.
The wire harness inspection apparatus 1 can store a plurality of guides 37, for example. A user can input a plurality of guides 37 to the wire harness inspection apparatus 1 . The wire harness inspection apparatus 1 can switch the guide 37 to the next guide 37, for example, each time the process of FIG. 6 is completed. The wire harness inspection apparatus 1 repeats the process shown in FIG. 6 until, for example, the process for all stored guides 37 is completed.

3. Effects of the Wire Harness Inspection Apparatus 1 (1A) By using the wire harness inspection apparatus 1, the wire harness 39 is provided with a plurality of electric wires in just the right amount without necessarily performing the work of checking the ends of the electric wires one by one. It is possible to determine whether or not Moreover, by using the wire harness inspection apparatus 1, it is possible to determine whether or not the ends of a plurality of electric wires are in the correct positions without necessarily performing the work of checking the ends of the electric wires one by one. Therefore, by using the wire harness inspection device 1, the wire harness 39 can be inspected easily and accurately.

(1B) The top plate 29 has an image display section 33 . The image display unit 33 displays a guide 37. FIG. Therefore, the wire harness inspection apparatus 1 can easily change the guide 37 to be displayed according to the wire harness 39 to be inspected.

(1C) The wire harness inspection device 1 changes the relative position of the RFID reader 7 with respect to the placement unit 5 in the longitudinal direction L. Therefore, the wire harness inspection device 1 can change the reading position in the longitudinal direction L. As a result, the wire harness inspection apparatus 1 can identify differences in the positions of the RFID tags 55 in the longitudinal direction L. FIG.
<Second embodiment>
1. Differences from First Embodiment Since the basic configuration of the second embodiment is the same as that of the first embodiment, the differences will be described below. Note that the same reference numerals as in the first embodiment indicate the same configurations, and refer to the preceding description.

In the first embodiment described above, the moving unit 9 moves the RFID reader 7 along the longitudinal direction L. As shown in FIG. In contrast, in the second embodiment, the mobile unit 9 scans the RFID reader 7 in the longitudinal direction L and the lateral direction W. FIG. Also, the width of the readable range 35 in the transverse direction W is smaller than the width of the top plate 29 in the transverse direction W. As shown in FIG.

In the processing of step 4 (S4), the information acquisition unit 21 uses the moving unit 9 to scan the position of the RFID reader 7 in the longitudinal direction L and the lateral direction W, and acquires the identification information of the RFID tag 55 and the RFID. Acquire the position information of the tag 55 . The positional information of the RFID tag 55 is defined by coordinates in the longitudinal direction L and coordinates in the lateral direction W. FIG. The position information of the RFID tag 55 included in the combination information and normal information is also defined by the coordinates in the longitudinal direction L and the coordinates in the lateral direction W. FIG.

2. Effects of Wire Harness Inspection Apparatus 1 According to the second embodiment described in detail above, the effects (1A) and (1B) of the first embodiment described above are obtained, and the following effect (2C) is obtained.

(2C) The wire harness inspection device 1 changes the relative position of the RFID reader 7 with respect to the placement unit 5 in the longitudinal direction L and the lateral direction W. Therefore, the position information of the RFID tag 55 included in the combination information and the normal information is defined by coordinates in the longitudinal direction L and coordinates in the lateral direction W. FIG. As a result, the wire harness inspection apparatus 1 can determine whether or not the position of the RFID tag 55 is correct not only in the longitudinal direction L but also in the lateral direction W.
<Other embodiments>
Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and can be implemented in various modifications.

(1) In the first embodiment, the moving unit 9 may move the placement unit 5 in the longitudinal direction L with the RFID reader 7 fixed. Also in this case, the relative position of the readable range 35 with respect to the top plate 29 can be changed.

Further, in the second embodiment, the moving unit 9 may move the mounting unit 5 in the longitudinal direction L and the lateral direction W while the RFID reader 7 is fixed. Also in this case, the relative position of the readable range 35 with respect to the top plate 29 can be changed.

(2) The RFID tag 55 may be attached to the wire harness 39 at a location other than the end of the electric wire. For example, the RFID tag 55 can be further attached to a place where a branch line diverges from the main line, a place where the branch line further diverges, and the like.

In the process of step 4 (S4), the wire harness inspection apparatus 1 further acquires the identification information of the RFID tag 55 attached to a place other than the end of the electric wire and the position information of the RFID tag 55, can be included in the combined information. In this case, the wire harness inspection device 1 can inspect the wire harness 39 in more detail.

(3) In addition to the RFID tag 55, the wire harness 39 may further include another label containing identification information. Examples of identification information included in the label include a one-dimensional code, a two-dimensional code, and the like. Examples of the two-dimensional code include a QR code (registered trademark). The label is, for example, attached to the end of each wire. In this case, the task of individually recognizing each electric wire is facilitated.

A one-dimensional code, a two-dimensional code, or the like may be printed on the RFID tag 55, for example. The wire harness 39 may have a label with visible identification information. A symbol corresponding to the identification information included in the normal information is printed on the label, for example.

(4) The guide 37 does not have to be displayed on the image display section 33 . For example, the guide 37 may be drawn on a medium such as paper. The medium can be placed on top plate 29 .

(5) The guide 37 may represent the shape of a part of the wire harness 39 instead of the shape of the entire wire harness 39 . Examples of the part include an end portion of an electric wire, a portion where a branch line branches from a trunk line, a portion where each electric wire branches from a branch line, and the like.

(6) A function of one component in each of the above embodiments may be assigned to a plurality of components, or a function of a plurality of components may be performed by one component. Also, part of the configuration of each of the above embodiments may be omitted. Also, at least part of the configuration of each of the above embodiments may be added, replaced, etc. with respect to the configuration of the other above embodiments.

(7) In addition to the wire harness inspection device 1 described above, a system having the wire harness inspection device 1 as a component, a program for causing a computer to function as the control unit 3 of the wire harness inspection device 1, and the program are recorded. The present disclosure can also be implemented in various forms, such as a non-transitional substantive recording medium such as a semiconductor memory, a manufacturing method of the wire harness 39, and the like.

DESCRIPTION OF SYMBOLS 1... Wire harness inspection apparatus, 3... Control part, 5... Placement unit, 7... RFID reader, 9... Moving unit, 11... Display, 13... Input part, 14... Database, 15... CPU, 17... Memory, 19 Result output unit 21 Information acquisition unit 23 Comparison unit 25 Judgment unit 27 Guide display unit 29 Top plate 31 Leg 33 Image display unit 35 Readable range 37 Guide 39 Wire harness 41 Main line 43, 45, 47, 49, 51, 53 Branch line 55 RFID tag

Claims (4)

A wire harness inspection device for inspecting a wire harness having a plurality of electric wires,
a placement unit including an image display section on which the wire harness having the RFID tag attached to the ends of the plurality of electric wires can be placed;
a guide that indicates a mounting position of the wire harness in the mounting unit;
an RFID reader capable of reading the identification information of the RFID tag;
a moving unit configured to change the position of the RFID reader relative to the mounting unit;
By reading the identification information using the RFID reader while changing the relative position using the mobile unit, information on a combination of the identification information and the position information of the RFID tag is obtained. an information acquisition unit configured in
The information on the combination acquired by the information acquisition unit is compared with the information on the combination when the wire harness includes the plurality of electric wires in just the right amount and the ends of the plurality of electric wires are in correct positions. a contrasting unit configured to
a determination unit configured to determine, based on the comparison result of the comparison unit, whether the wire harness includes the plurality of electric wires in just the right amount and whether the ends of the plurality of electric wires are in correct positions; ,
with
The moving unit is configured to change the relative position in the longitudinal direction of the wire harness,
The readable range of the RFID reader covers the entire width of the mounting unit in a direction perpendicular to the longitudinal direction ,
The image display unit displays the wire harness so as to have a portion where the plurality of electric wires are bundled and a portion branched from the bundled portion, and displays ends of the plurality of electric wires to which the RFID tags are attached. display so that the branched portion extends along the longitudinal direction of the wire harness toward the
Wire harness inspection equipment. The wire harness inspection device according to claim 1 ,
The wire harness inspection device in which the guide is displayed on the image display unit. A wire harness inspection method for inspecting a wire harness having a plurality of electric wires,
placing the wire harness having RFID tags attached to the ends of the plurality of electric wires on a placement unit according to a guide indicating a placement position of the wire harness;
By reading the identification information using the RFID reader while changing the relative position of the RFID reader capable of reading the identification information of the RFID tag in the longitudinal direction of the wire harness with respect to the mounting unit, Acquiring information on a combination of identification information and position information of the RFID tag,
Contrasting the acquired information on the combination with the information on the combination when the wire harness includes the plurality of electric wires in just the right amount and the ends of the plurality of electric wires are in correct positions,
Based on the result of comparison, determining whether the wire harness includes the plurality of wires in just the right amount and whether the ends of the plurality of wires are in correct positions;
The readable range of the RFID reader covers the entire width of the mounting unit in a direction perpendicular to the longitudinal direction ,
The placement unit includes an image display section on a surface on which the wire harness is placed,
The image display unit displays the wire harness so as to have a portion where the plurality of electric wires are bundled and a portion branched from the bundled portion, and displays ends of the plurality of electric wires to which the RFID tags are attached. display so that the branched portion extends along the longitudinal direction of the wire harness toward the
Wire harness inspection method. The wire harness inspection method according to claim 3 ,
The wire harness inspection method, wherein the guide is displayed on the image display unit.

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