JPH0440807B2 - - Google Patents

Description

[Detailed Description of the Invention] [Background and Objectives of the Invention] The present invention relates to a multicolor flat cable strand arrangement inspection method, and particularly relates to a multicolor flat cable wire arrangement inspection method in which twisted pairs and parallel portions are alternately provided in the length direction. The present invention relates to a multicolor flat cable strand arrangement inspection method suitable for inspecting the strand arrangement of a flat cable.

The conventional method for inspecting the strand arrangement of this type of flat cable is to use a highly sensitive photoelectric sensor to detect the light reflected from the surface of the strands as a difference in brightness, and then process the signal in an electric circuit to inspect the strand arrangement. It was becoming like that.

However, since such devices judge colors using differences in brightness, they can distinguish between two colors with relatively high accuracy, but they cannot detect the same brightness of reflected light for wires with different colors. The drawback is that it does not function at all.

Therefore, it has been impossible to inspect the strand arrangement of multicolor flat cables using conventional inspection methods.

In addition, a method of determining colors by converting reflected light into the three primary colors of red, green, and blue (hereinafter referred to as R, G, and B) is used to determine the color of foods, pigments, etc. It is unsuitable for continuous detection of moving multicolor flat cables of 1 mm or less and for determining the quality of the arrangement.

The present invention has been made in view of the above, and its purpose is to mechanically and automatically arrange the strands of a multicolored flat cable, which is formed by alternately providing paired twisted portions and parallel portions in the length direction. This provides a multicolor flat cable strand arrangement inspection method that can be inspected.

[Summary of the Invention] That is, the gist of the present invention is to provide a multicolored flat cable formed by arranging strands in which paired twisted portions and parallel portions are alternately provided in the longitudinal direction. The cable is continuously advanced and is integrally fixed to a moving mechanism movable in the traveling direction and width direction with respect to the cable,
A detector that detects the reflected light from the parallel part of the cable, separates it into three primary colors of red, green, and blue, and outputs it, a photoelectric sensor that detects the parallel part of the cable, and the moving mechanism. When the photoelectric sensor detects the parallel part of the cable wire, the moving mechanism moves the detector in the traveling direction and the width direction, and transmits the output signal of the detector. The reference values of red, green, and blue of each color stored in advance in the signal processing device and the red, green, and blue values taken from the detector are input into the processing device and detected by the Magnescale for each predetermined movement distance in the width direction. The multicolored flat cable is characterized in that the wire arrangement of the multicolored flat cable is inspected by calculating the sum of squares of the detected values of green and blue, and determining the smallest result as the compared color. It is in the color flat cable strand arrangement inspection method.

[Example] Hereinafter, the present invention will be described in detail using the example shown in FIG. 1 and FIGS. 2 to 4.

FIG. 1 is a block diagram showing an embodiment of the multicolor flat cable strand arrangement inspection method of the present invention. As shown in FIG. A multicolored flat cable is used in which a large number of strands of 2 and 2 wires are arranged in parallel. In FIG. 1, 2 is a parallel part of the strands of a multicolored flat cable, 3 is a detector, the detector 3 is fixed to a rack 5 by a connecting fitting 4, and the rack 5 is attached to a base 6. A pinion connected to an electric motor built into the fixed head 7 allows it to move in the direction of the arrow in the figure, that is, in the width direction of the parallel portion 2. Note that the base 6 has a mechanism that allows it to move in the traveling direction (lengthwise direction) of the multicolored flat cable. Reference numeral 8 denotes a light source, which is attached to the detector 3 at an angle of 45° to the light incident axis of the detector 3. Reference numeral 9 denotes a reflective high-precision photoelectric sensor for detecting the parallel portion 2, and the R, G, and B outputs from the detector 3 are input to the signal processing device 10 only when the photoelectric sensor 9 is in operation. It is set as.
Reference numeral 11 denotes a magnet scale, which generates a pulse every time the rack 5 moves at a fixed interval (several μm) in the direction of the arrow in the figure as the rack 5 moves. Note that the detector 3, the photoelectric sensor 9, and the Magnescale 11 are configured to move as one.

Now, when the parallel portion 2 of the strands of the multicolored flat cable moving in the length direction comes directly under the detector 3, the detector 3 moves in the cable length direction in synchronization with the cable. That is, since the multicolor flat cable is produced continuously, it is moved in synchronization with the production, and furthermore, at the same time as the start of movement, it also begins to move in the width direction of the parallel portion 2. At this time, when the photoelectric sensor 9 detects the parallel part 2, the pulse signal from the Magnescale 11 is taken into the electronic counter 12,
The electronic counter 12 counts the amount of movement required to reach _P0 , which is 1/2 of the pitch between the strands of the parallel portion 2, and then inputs the R, G, and B output signals from the detector 3 into the signal processing device 10. Furthermore, when the detector 3 moves in the width direction, the pulse signal from the Magnescale 11 is counted by the electronic counter ₁₃ , and then the R, G, B
The output signal is taken into the signal processing device 10. Thereafter, R, G, and B output signals corresponding to the number of wires P ₂ to _{P o} are taken into the signal processing device 10 and stored in memory.

Figure 3 is a time chart of the various signals in Figure 1, and Figure 4 is a diagram showing the R, G, and B output signal levels when the detector 3 in Figure 1 is moved in the width direction. be.

At the same time as the data for the cable wires stored in the signal processing device 10 is completed, as shown in equation (1) below, all the data colors of R and G that have been input in advance are processed. , B, and the smallest value is determined to be the color of the wire that is the same as the compared data color. In other words, the first color is determined by comparing it with the first color of the array stored in advance by calculating equation (1), and this determination is made for all the wires. It is possible to almost completely inspect the alignment of most colors. All of the above processing is automatically performed using the microcomputer of the signal processing device 10.

Si ² = (Ri−Rx) ² + (Gi+Gx) ² + (Bi+Bx) ² …(1
) Here, Si: Residual Pi: Standard R value (red) Gi: Standard G value (green) Bi: Standard B value (blue) Px: Detected R value Gx: Detected G value Bx: Detected B value Books mentioned above According to an embodiment of the invention, the colors in a minute area are optically detected, separated into the three primary colors of R, G, and B, and the strands of a multicolor flat cable are automatically created online using a microcomputer. Sequence detection can be performed, and it has the following effects.

(1) Since the conventional human visual inspection is replaced by a machine, the number of inspection man-hours can be reduced.

(2) Product reliability can be improved.

(3) It is cheaper than methods based on image processing, etc.

(4) It is applicable because it can detect colors in a minute area (0.5 to 1 mm in diameter).

[Effects of the Invention] As explained above, according to the present invention, the wire arrangement of a multicolored flat cable in which paired twisted portions and parallel portions are alternately provided in the length direction can be mechanically and automatically inspected. This has the effect of reducing inspection man-hours and improving reliability.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the multicolor flat cable arrangement inspection method of the present invention, FIG. 2 is an explanatory diagram of a strand of multicolor flat cable having paired twisted portions and parallel portions,
FIG. 3 is a time chart of the various signals in FIG. 1, and FIG. 4 is a diagram showing the R, G, and B output signal levels when the detector in FIG. 1 is moved in the width direction. 1: Twisted part, 2: Parallel part, 3: Detector, 5: Rack, 7: Head, 8: Light source, 9: Photoelectric sensor, 10: Signal processing device, 11: Magnescale, 12, 13: Electronic counter .

Claims (1)

[Claims] 1. A multicolored flat cable made of wires arranged in pairs and parallel parts alternately in the length direction is continuously advanced in the length direction, and A detector is integrally fixed to a movement mechanism that can move in the width direction, and detects the reflected light from the parallel portion of the cable, separates it into three primary colors of red, green, and blue, and outputs it; It consists of a photoelectric sensor that detects the parallel part of the wire, and a magnescale that detects the moving distance in the width direction of the moving mechanism,
When the photoelectric sensor detects the parallel part of the cable wire, the moving mechanism moves the detector in the traveling direction and the width direction, and the output signal of the detector is taken into the signal processing device, and the sensor is moved in the predetermined width direction detected by the Magnescale. For each moving distance, calculate the sum of squares of the reference values of red, green, and blue of each color stored in advance in the signal processing device and the detected values of red, green, and blue taken in from the detector, A multicolor flat cable strand arrangement inspection method, characterized in that the strand arrangement of the multicolor parallel cable is inspected by determining the color with the smallest result as the compared color.