JPS6332671A - Color dividing method for coordinate data - Google Patents

Abstract

PURPOSE:To avoid the influence of the output change due to the change of the working environment of a detector by specifying a color based on the ratios between the R, G and B outputs of a color detector and the sum total of these outputs. CONSTITUTION:The R, G and B detection outputs obtained at each point by a color sensor 24 of a color detector and an A/C converter 42 are processed by a firmware CPU43. Then the ratios are decided between those R, G and B outputs and the sum total of these outputs. Thus each color is specified. These specified colors are stored in a memory of a CPU43 which receives an access with the output given from a coordinate counter through scanning defined as an address. Then those colors are used via a host computer 80, etc. Thus the influence of the output change due to the change of the working environments of the detector can be avoided by said color specifying system. Then the colors can be divided at each detecting point with high accuracy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is for classifying the XY coordinate data of the center point of a hole mark, etc. on a drawing such as an original film for a printed circuit board by the color attached to the hole mark, etc. The color classification of the coordinate data of is related to the method.

[Conventional technology]

This kind of hole mark automatic reading method is published in Japanese Patent Application Laid-open No. 58-50.
Various methods have been proposed, as shown in Japanese Patent Application Laid-open No. 408, Japanese Patent Application Laid-Open No. 58-208608, and Japanese Patent Application Laid-Open No. 60-71129.

The above-mentioned Japanese Patent Application Laid-Open No. 58-50408 discloses that the colors attached to the hole marks are detected by detectors having various color sensitivities.
A reading method is disclosed in which a detector is scanned over the drawing a number of times depending on the type of color. Japanese Patent Publication No. 58-20860
Publication No. 8 states that the hole mark is automatically scanned with a scanner camera, the color of the hole mark is detected when the center point of the hole mark is automatically read, and the coordinates of the center point of the hole mark are determined according to this color signal. A reading method is disclosed that classifies values by hole diameter.

Japanese Unexamined Patent Publication No. 60-71129 discloses a hole diameter information generation system in which identification color detection means is sequentially positioned at each mark position on a drawing by a positioning mechanism, and information indicating the hole diameter is generated for each hole mark position. There is.

[Problem that the invention seeks to solve]

In the technique disclosed in Japanese Patent Application Laid-Open No. 58-50408, the drawing must be scanned for each type of hole mark color. For example, when hole marks are distinguished by three colors, three scans are required, and there is a drawback that it takes time to read the position and diameter of the hole mark. In addition, if you want to detect, for example, three colors in one scan, you have to prepare three sensors. There is a drawback that when the mark is scanned and the detection area of the color sensor is located away from the hole mark, the color sensor may not be able to detect the color of the hole mark.

Furthermore, the above device and the device disclosed in Japanese Patent Application Laid-open No. 60-71129 solve the problem of variations in color detection output signals caused by changes in the working environment such as temperature and humidity during detection by the color detection device. Not during color detection.

When variations occur in the output of the color detection device, it is not possible to accurately identify the color of the detection point based on the color detection signal, and the color classification of the detection point has a defect that causes errors in the work. .

The present invention aims to eliminate the above-mentioned defects.

[Means to solve problems]

In order to achieve the above object, 1. When detecting a color at a single point on a drawing, the present invention converts the RGB output of the color detection device into
,■=B/(R+G+B), β,″?
f, and the color of the detection point is specified based on this value.

[Operation] Even if variations occur in each data RGB of each output terminal of the color detection device, (X, β, '6.

Since it is a ratio of each of RGB to the total sum of RGB, the degree of variation can be minimized, and therefore color classification of color detection points can be performed with high accuracy.

〔Example〕

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

In FIG. 8, 2 is the body of an automatic coordinate reader, and a table 4 made of a transparent plate is supported on this body. X rails 6.8 are arranged on both sides of the table 4, and an X cursor 10.12 is movably attached to the X rails 6.8. 14 is the X cursor 10. This is a Y-rail constructed between '12 and a carrier is movably attached to this. 18 is a head attached to the carrier, and as shown in FIG. 9, a line scanner camera 22 and a known color detection bag w124 are attached to the casing 2o. Color detection bag! ! 24 R (red), G
(green) and B (blue) are connected to the firmware CPU 43 via the A/D converter 42, as shown in FIG. A lens barrel 34, 36 in which an imaging lens system is placed and half mirrors 38, 40 are attached to the casing 2o. The line scanner camera 22 has a known photodetection section (CCD) in which a large number of minute photodetection elements are linearly arranged. 70 is a lens group, 71° and 72 are mirrors, 74 is a projector, and 76 is a halogen lamp. The firmware cPU 43 is connected online to the host CPU 80 of the host computer 50 via a transmission line. A drive device 86 and a halogen lamp 76 for moving the head 18 on the table 4 in the XY direction are connected to the host CPU 80 via drivers 82 and 84. A hard disk 88 constitutes an external storage device of the host computer.

FIG. 7 shows built-in CPUs 43 and 80.

It is a block explanatory diagram of a hole mark center point calculation means. When the scanner camera 22 sequentially scans a large number of hole marks 68 formed on the transparent printed circuit board circuit original drawing film 44 by driving the head 18 in a predetermined direction on the table 4, the digital detection unit of the scanner camera 22 detects the holes. The signal is input to the sense data register 90. The contents of the register 90 are sent to a hole determination logic circuit 92, which determines whether the mark scanned by the scanner camera 22 is a hole mark. The center point calculation logic circuit 96 receives the scan data of the sense data register 90 and the head 1.
The XY coordinate value of the center point of the hole mark is calculated based on the contents of a register 98 that holds the count value of a counter 94 that counts the amount of movement of the hole mark 8 in the XY coordinate direction, and the hole judgment signal of the hole judgment logic circuit 92. do. This calculation data is filed in the data file memory 100 in the hard disk 88, and the coordinate data of the center point of the hole mark is stored, for example, in the NG
In order to correspond to drills (tools) of various thicknesses of automatic drilling machines, the first and second steps are about sorting by diameter.
This will be explained with reference to the flowchart shown in the figure.

First, a transparent sheet (not shown) is placed on the film 44, and a color is applied on the transparent sheet (not shown) using a colored writing instrument so that the hole marks 68 having the same hole diameter are the same color.
The hole marks 68 of No. 4 are color-coded for each diameter. Next, the halogen lamp 76 is turned off, and with no light from the lamp 76 entering the detection section of the color detector 24,
The head 18 is moved over the film 44, and the colored portion on the film 44 is detected by the color detector 24. At this time, the RGB output ΔR9ΔG of the color detector 24, Δ
B is A/D converted and stored in the host CPU 80 as offset data.

Next, the head 18 is returned to its original position, and the halogen lamp 76 is turned on.

Next, the head 18 is moved based on the hole mark center point data read under the control of the host CPU 80, and the color detection @ 24 is sequentially moved to the previously read hole mark position.

When the color detector 24 detects the color of the hole mark 68, the RGB analog voltage signal at that time is converted into a digital signal by the A/D converter 42 and input to the firmware CPU 43. Based on the read R, G, and B digital data and the offset data ΔR1ΔG and ΔB, the CPUs 43 and 80 calculate 〆=(R−ΔR)/
(R+G+B-(ΔR+ΔG+ΔB)) β= (G-ΔG)/(R+G+B-C to R+ΔG+
ΔB)) '5"= (B-ΔB)/(R〇+B-(ΔR+Δ
G+8B)) out.

In advance, a reference mark, 8.
The correspondence between values and hole diameters (tool numbers) is filed as a color table. Comparing the values of this reference value, B, and 3 with the x, s, and 'g data read this time, if it is within a certain range, the color of the hole mark read this time is the reference value, β, and It is recognized as the corresponding color (tool number).

The operation of the above color table will be explained with reference to FIG.

In the figure, gn, βn, '6n are ME, S, '6 corresponding to the tool number Tn.

Let me, β, and be the values determined from the current RGB, and let EPS be a certain value determined experimentally, and if the following equation is satisfied, the current color detection point is recognized to correspond to tn.

(Meg n) ≦EPS and (β-βn)2 ≦EPS and ('W-'6n
) ≦EPS Once the tool information is determined by the above operations, the database, ie, the XY data of the center point of the hole mark on the film 44, is transferred to a file corresponding to the tool tn and classified.

By performing such operations, the XY coordinate data of the center point of each hole mark is stored in files corresponding to t1 to tn on the hard disk for each color. The XY coordinate data thus sequentially divided into files corresponding to t1 to tn are converted into input data for the NG automatic drilling machine. For example, the XY position corresponding to the center point of the hole mark marked in red is a drill tl with a diameter of 1 mm, and the XY position corresponding to the center point of the hole mark marked in green is the diameter 1 mm.
．． Input data is created that indicates that a hole will be drilled using a 5mm drill t2, and based on the input data, a numerically controlled automatic hole drilling machine is controlled, a drill is selected, and a through hole is drilled at a predetermined location on the printed circuit board. Drill a hole in the hole. In addition, when implementing the present invention, the above 〆, β, '6 are ΔR1Δ
It is not necessary to subtract G and ΔB.

〔effect〕

Since the present invention is configured as described above, there is an advantage that color classification of detection points can be performed with high precision without being affected by variations in output due to changes in the working environment of the color detection device.

[Brief explanation of drawings]

Figure 1 is a flowchart, Figure 2 is a flowchart, Figure 3 is a block diagram, Figure 4 is a block diagram, Figure 5 is a color table diagram, Figure 6 is a block diagram, Figure 7 is a block diagram. , Figure 8 is an external view of the automatic coordinate reader, and Figure 9 is an external view of the automatic coordinate reader.
The figure is a mechanical explanatory diagram of the head. 2...Aircraft, 4...Table, 6,8...
...X rail, 10.12...X cursor. 14...Y rail, 18...head. 20...Casing, 22...Line scanner camera, 24...Color detection device. 34.36°°°° lens barrel, 38.40...
・Half mirror 944...Film, 50...
Host computer, 68...hole mark, 7
1.72...Mirror, 74...Projector,
76...Halogen lamp patent applicant Muto Kogyo Co., Ltd. Representative patent attorney Aya Nishijima il j,'; 9, -+- Figure 1 Figure 2 Figure 9

Claims (1)

[Claims] (1) Color each of a plurality of points on the drawing on the table, classify the points by color, and sequentially move a color detection device that outputs RGB color detection signals to each of the points; In the color sorting method, the color of each point is detected based on the RGB output of a color detection device, and the color of each point is sorted into a memory according to the XY coordinate data color of each point based on the detected data. A method for color classification of coordinate data, characterized in that the ratio of each RGB output of a device to the total sum of each output is calculated, and the color of each point is specified based on the ratio.