KR101119888B1 - Automatic checking system for electric wire of automobile and automatic checking method for electric wire of automobile - Google Patents

Abstract

PURPOSE: An automatic inspection device for fault extraction of automobile engine wiring and an inspection method thereof are provided to improve the productivity and sales performance. CONSTITUTION: An automatic inspection device for fault extraction of automobile engine wiring comprises a camera(100), an illumination device(200), a controller(300) and a display unit(400). The camera takes a photograph of automobile engine wiring product. The camera gets video information. The illumination device lights the subject in order to get the video information of high quality. The controller transfers the operating control signal to each data processing and configuration part. The display unit visually outputs the fault and statistical data of the engine wiring at the controller.

Description

{Automatic checking system for electric wire of automobile and automatic checking method for electric wire of automobile}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic inspection apparatus and an inspection method for defect extraction of automotive engine wiring, and more particularly, to check whether a plurality of color bands are taped for ease of assembly in automotive engine wiring. And a method for inspecting the same.

Automobiles are a comprehensive mechanism composed of numerous parts such as engines, drives, electronics, and bodywork, and have been used as a convenient means of replacing human legs for a century since the invention of steam cars at the end of the 19th century.

Early automobiles mostly depended on mechanical devices, but gradually, various functions were added to the interior of the automobiles, and recent automobiles are equipped with electronic devices close to electronic products. As a result, harnesses for connecting parts and electronic devices have increased, mainly in ECUs. These wirings are classified as important components that are responsible for the performance and safety of automobiles.

Generally, the total length of wiring for a midsize car is about 2km and the weight is about 25kg. Wiring is made of parts after connecting with connectors of various thicknesses and lengths in consideration of assembly and electrical capacity according to the type of vehicle.

In addition, these wirings vary depending on the size and model of the vehicle, and are manufactured manually by various types of vehicles. Since the lengths of the wirings are similar, the types of wirings are marked, and in the case of wiring consisting of several strands, considering productivity In order to display the assembly sequence in the automobile assembly process, the wiring is divided with color bands as shown in FIG. 1.

However, the defects and quality inspection of the wires manufactured as described above are currently made through visual inspection, and the eye fatigue caused by repeated work is frequently caused by the instantaneous optical illusion, which leads to productivity There were problems such as cost loss due to the shipment of defective products and deterioration of corporate image by major customers.

Problems that occur mainly during quality inspection through manual work include the following items.

       -No color stripe attached.

       -Color bands are attached in different order.

       -The color strips are attached differently from the standard.

       -The colors of the color strips are attached differently.

       -Wiring is made of different length.

-There is no accurate statistical data such as the defective rate and the cause of defectiveness according to the production period and production volume.

-There is no data on defective products.

As described above, in order to solve the problems in the quality inspection of the engine wiring that is made through visual inspection, the quality inspection should be automated, and thus, an inspection method and an inspection apparatus that can improve the reliability and productivity are required. .

Accordingly, the present invention has been made to solve the above-described problems of the prior art, by checking the suitability of a number of color bands taped for ease of assembly in automotive engine wiring by automatically extracting the presence and failure cause An object of the present invention is to provide an inspection apparatus and inspection method for automotive engine wiring that can minimize the defective rate for the vehicle engine wiring module product and improve productivity.

As a technical means for achieving the above object, the present invention is to automatically determine the length of the cable and the color of the marking tape, the interval between the color bands and the order of the color bands from the image of the automotive engine wiring product photographed using a camera It provides an inspection apparatus and inspection method to automatically recognize defective products by recognizing it.

According to the automatic inspection device and inspection method for the extraction of the defect of the automotive engine wiring according to the present invention, by reducing the inspection manpower, minimize the failure rate through the automatic inspection of the engine wiring has the effect of improving the productivity and sales have.

In addition, it is possible to calculate the statistics about the defective rate and to store the data about it, it is also effective to solve the problem quickly by providing the cause of the failure in real time.

In addition, it is possible to improve the reliability of the product and the company by minimizing the defective rate.

1 is a product photograph of automotive engine wiring.
2 is a block diagram illustrating an automatic inspection apparatus for extracting a defect of an automotive engine wiring according to an exemplary embodiment of the present invention.
3 is an overall flowchart illustrating a test method for extracting a defect of an automotive engine wiring according to an exemplary embodiment of the present invention.
4 to 10 show pictures of each step in the inspection method for fault extraction of the engine wiring.
11 and 12 are photographs showing the automatic inspection device for the extraction of the defect of the vehicle engine wiring according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating an automatic inspection apparatus for extracting a defect of an automotive engine wiring according to an exemplary embodiment of the present invention.

As described above, the inspection apparatus of the automotive engine wiring according to the present invention, the camera 100 for capturing the automotive engine wiring to obtain the image information, and the illumination for irradiating light to the subject to obtain high-quality image information ( 200, the color of each color band taped to the wiring from the image information photographed by the camera 100, the position of the color band, the number of color bands, the length of the cable and the mutual gap of the color band, etc. The controller 300 for determining whether the engine wiring is defective or not, processing statistics about the defective rate, and outputting the result on the screen; It is configured to include a display unit 400 for visually outputting whether or not the engine wiring is determined at 300 and the statistical data.

Preferably, the camera is a CCTV camera capable of transmitting a captured image as digital data. The illumination is preferably applied to an LED light having a small change in illumination and a long service life even when used for a long time.

The engine wiring 10 to be inspected in the above is formed as shown in FIG. 1, and a plurality of cables are gathered to form a single cable bundle, but in one position, the plurality of cables are configured to branch, respectively. At least one color stripe is taped on the branched cable, and each taped color strip is formed to be spaced apart from each other. The engine wiring 10 having such a configuration is a standardized shape for assembling according to the wiring connection of the vehicle, the length of the branch point and the end of the cable branched from one position, the color of the taped color band and the position thereof. And arrangement order, spacing between color bands, and the like must conform to standardized conditions.

The controller 300 extracts various types of information from the image information of the engine wiring 10 photographed by the camera 100, and includes a wiring recognition unit 310, an object recognition unit 320, and a statistical processing unit ( 330, and a screen processor 340.

The wire recognition unit 310 is the color of the color strip, the number of color strips, the position of the color strips, the spacing and arrangement order between the colors in the captured image of the engine wiring 10, and the cable To determine the number and length. In more detail, the wire recognition unit 310 as described above is a color recognition unit for determining the color of the tape, the length of the cable to determine the length of the length, the location of the color strip, the interval between the color strips, etc. And a quantity recognizing unit for recognizing the number of cables and the number of color strips.

In the above, the object recognition unit 320 determines whether the engine wire 10 is present in the image captured from the image captured by the camera 100 or whether the captured object is the engine wire 10 of the inspection target. It is.

The statistical processing unit 330 calculates the defective rate of the engine wiring 10 that has been inspected and calculates the statistics. The statistical DB 331 stores data such as whether the engine wiring 10 is defective or not. It includes.

In this case, the screen processing unit 340 constructs a UI (User Interface) to visually convey to the inspector whether the engine wire 10 determined by the wire recognition unit 310 is passed or failed.

The display unit 400 receives the output signal from the screen processing unit 340 and outputs a visual image. The display unit 400 visually provides pass / fail for the test result and statistical data about the defective rate.

3 is an overall flowchart illustrating a test method for extracting a defect of an automotive engine wiring according to an exemplary embodiment of the present invention, and FIGS. 4 to 10 illustrate pictures of each step for extracting defects of an engine wiring.

As described above, the engine wiring to be examined in the present invention is a plurality of cables gathered to form a bundle of cables, but in one position is configured so that a plurality of cables are each branched, each branched cable has a color strip At least one is tapered.

In order to inspect the specifications of the engine wiring 10, first, the engine wiring 10 disposed on the inspection table is photographed from the camera 100 equipment to obtain an image (S10). In this process, in order to obtain high quality image information on the subject, light may be irradiated onto the subject from the lighting 200 apparatus.

Next, the color of the color band taped to the engine wiring 10 is recognized from the captured image (S20). In more detail, red, green, and blue colors are extracted from an image of the engine wiring 10. As shown in FIG. 4, the red image, the green image, and the blue image, respectively, are extracted. Separate in the form (S21).

And, as shown in Figure 5, using the red image, green image, and blue image extracted from each of the red, blue, yellow, and white areas in detail separated (S22), the detailed red, Blue Colors for the yellow, white, and white regions are synthesized into one image (S23).

Next, a starting point is detected for accurate recognition of the inspection area (S30). This is because the position of the taped blue color band is applied at a position forming one bundle before the plurality of cables are branched. The image of detecting the starting point is shown in FIG. 6.

Next, the shape of the cable having a thickness is converted into a session image processed into a line (S40). More specifically, the captured image of the engine wiring 10 is binarized and converted into a black / white image first (S41), and the session is processed again to process a shape of a cable having a thickness as a line to obtain a session image. (S42). FIG. 7 illustrates a conversion of an image of the engine wiring 10 into a binarized image and a sessionized image.

Next, a branching point at which each cable branches into several branches is detected in the cable forming one bundle (S50). This is to detect the branch point using the sessionized image as shown in FIG.

Next, the cable line is traced based on the branch point to extract the recognition point such as the position of the color strip (S60).

Next, using the detection data to determine whether or not the engine wiring 10 in the captured image conforms to the standard (S70), more specifically, whether the total length of each cable conforms to the standard ( S71), whether the color bands are all attached through the total number of color bands (S72), and the arrangement order of the taped color bands (S73), and whether the spaces between the taped color bands match the specifications (S74). ), Whether the color of the color band taped at each position conforms to the specification (S75) is included in the inspection object.

FIG. 10 is a photograph showing a process of checking whether a color band of a recognition target coincides with its color with respect to the engine wiring of the inspection target.

Next, the inspection result is stored in the statistics DB 331 (S81 and S82), and the display unit 400 visually outputs whether the engine wiring 10 passes or fails and the cause of the failure (S90).

As described above, although the technical idea of the present invention has been described with reference to the preferred embodiments, those skilled in the art will be able to vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Can be modified and changed.

10: engine wiring 100: camera
200: lighting 300: control unit
310: wiring recognition unit 320: object recognition unit
330: statistical processing unit 340: screen processing unit
400: display unit

Claims (8)

A plurality of cables are gathered to form one cable bundle, but at one position, a plurality of cables are branched separately, and at least one color stripe is taped for ease of wiring. Regarding the device for inspecting,
A camera (100) for photographing a vehicle engine wiring product and obtaining image information;
An illumination 200 for irradiating light onto a subject to obtain high quality image information;
Engine wiring by judging the color for each color stripe, the position of the color stripe, the number of the color stripe, the length of the cable and the mutual gap of the color stripe taped to the wiring from the image information photographed by the camera 100 A control unit (300) for determining whether or not a defect is detected, calculating a defective rate, and outputting a calculation result of whether the engine wiring is defective and a defective rate on a screen, and transmitting an operation control signal to each component unit;
And a display unit 400 for visually outputting whether or not the engine wiring is determined by the controller 300 and statistical data.
The method of claim 1,
The control unit 300, in the captured image of the engine wiring 10, the color of the color band, the number of color bands, the position of the color band, the spacing and arrangement order between the colors, and the number of cables and A wire recognition unit 310 for determining a length;
An object recognition unit 320 determining whether the engine wiring 10 is present from the image photographed by the camera 100 or whether the photographed subject is the engine wiring 10 of the inspection target;
A statistical processor 330 for calculating a defective rate of the engine wire 10 that has been inspected and including a statistics DB 331 for storing data corresponding to whether the engine wire 10 is defective or not;
And a screen processing unit 340 for constructing a user interface (UI) to visually transmit the pass and fail of the engine wiring 10 determined by the wire recognition unit 310 to the inspector. Automatic inspection device for fault extraction of automotive engine wiring.
The method of claim 2,
The wire recognition unit 310 includes a color recognition unit for determining the color of the taped band, a length recognition unit for determining the length of the cable, the position of the color strip, and the space between the color strips, the number of cables and the color strips. Automatic inspection apparatus for extracting the defect of the engine wiring of the vehicle, characterized in that it comprises a quantity recognition unit for determining the number.
In the method for checking whether the engine wiring 10 conforms to the standard,
Acquiring an image by photographing the engine wiring 10 disposed on the inspection table from the camera 100 equipment (S10);
Recognizing the color of the color band taped to the engine wiring 10 from the captured image (S20);
Detecting a starting point for accurate recognition of the inspection area in the captured image (S30);
Converting a shape of a cable having a thickness from the captured image into a session image processed by lines (S40);
Detecting a branching point at which a plurality of cables branch from the session image (S50);
Extracting a recognition point by tracing the cable line based on the branch point (S50);
Determining whether the engine wiring 10 conforms to the specification by using the color of the color strip and the position information of the color strip (S70). Way.
The method of claim 4, wherein
Recognizing the color of the color band taped to the engine wiring 10 (S20),
Red, Green, and Blue colors are extracted from the image of the engine wiring 10, and red, green, and blue images, respectively, are extracted. Separating into (S21);
By using the red image, green image, and blue image extracted from the above, each of the red, blue, yellow, and white regions is used. A detailed separation process (S22);
A process of synthesizing the colors of the separated red, blue, yellow, and white regions into a single image (S23); Inspection method for defect extraction.
The method of claim 4, wherein
The starting point is an automobile engine, characterized in that it can be detected from a position where a blue color stripe is taped at any one position forming one bundle before a plurality of cables are branched in the shape of the engine wiring 10. Inspection method for defect extraction of wiring.
The method of claim 4, wherein
The process of converting to the session video (S40),
Converting the captured image of the engine wiring 10 into a black / white image (S41);
And obtaining a session image by processing a shape of a cable having a thickness in the black / white converted image as a line (S42).
The method of claim 4, wherein
Determining whether the engine wiring 10 conforms to the standard (S70),
Determining whether the length of each cable conforms to the standard (S71);
Determining whether all the color bands are attached through the total number of color bands (S72);
Determining whether the arrangement order of the taped color bands conforms to the specification (S73);
Determining whether the spaces between the taped color bands coincide with the standard (S74);
And determining (S75) whether or not the color of the color band taped at each position corresponds to the specification (S75).

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