JPH041386B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses a detection unit of a line scanner camera to detect the XY coordinate values of a specific point of a predetermined figure, such as the center point of a white circle on a black background or the center point of a black circle on a white background, in a drawing on a table. An automatic coordinate reader for automatically reading drawings by scanning them, characterized by aligning the center of the index displayed on the screen that reflects the table surface with the count reference point of the detection unit. That is.

A line scanner camera installed in the head automatically scans the drawing on the table, automatically reads the XY coordinate values of specific points of each figure on the drawing, and then calculates the XY coordinate values of the specific points of the desired figure. There are cases where you want to input something to the controller. In this case, it would be better to set an index on the head, manually control the head to match the center of this index with a specific point on the desired figure, and input the count value of the counter at this time into the controller. If the XY coordinate reference of the center point of the index and the XY coordinate reference of the line scanner camera do not match, the specific point of the desired shape
The XY coordinate values read by the line scanner camera and the values read by the index will be different. An object of the present invention is to provide an automatic coordinate reader that eliminates the above-mentioned defects.

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

A table 2 is fixed to the body 1 and is made of a transparent plate, and a lighting device is arranged below the table 2.

X rails 4, 6 are fixedly installed on both sides of the table 2, and X cursors 8, 10 are movably attached to the X rails 4, 6. Reference numeral 12 denotes a Y rail installed over the X cursors 8 and 10, to which a carrier 14 is movably attached, and to the carrier 14 a head 16 is attached. The X cursors 8 and 10 and the carrier 14 are configured to be driven along the X rails 4 and 6 and the Y rail 12 according to commands from a controller 18. Said head 1
6 is attached with a projection device 22 consisting of a line scanner camera 20 and an ITV camera.
The image is displayed on a screen 26 consisting of a cathode ray tube of a monitor television set on an operation console located adjacent to the screen. The console 24 is provided with a manual switch 28 for moving the head 16 to any desired position on the table 2. The amount of movement of the hend 16 from the origin in the X-Y coordinate axis direction is counted by a counter in the controller 18 and is digitally displayed on the display section 30 of the console 24. The mechanism for supporting the head 16 so as to be movable in any direction relative to the table 2 is the same as that of a numerically controlled automatic drafting machine, and this structure is well known. Next head 1
The structure of No. 6 will be explained with reference to FIG.

32 is a cylinder fixed to a substrate 34, and a commercially available lens cylinder 36 is fixed to this. A lens system (not shown) is arranged inside the lens barrel 36 . 38 is a holder fixed to the substrate 34, and a half mirror 40 is fixed to this so as to be inclined at 45 degrees with respect to the two surfaces of the table.

20 is a line scanner camera located directly above the half mirror 40 and fixed to the substrate 34, and in its light path, approximately 1000 minute photodetecting elements are arranged in a length of 26 mm. Photodetectors 44 arranged in a line are arranged. 46 is a holder fixed to the substrate 34, and a half mirror 48 is fixed to this. The half mirror 48 is set to the side of the half mirror 40 at the same height and inclination angle. A lens system 50 is disposed on the substrate 34 between the half mirrors 40 and 48. Reference numeral 22 denotes an ITV camera fixed to the substrate 34, and its light entrance portion is located directly above the half mirror 48.

54 is a lens system located directly below the half mirror 48 and fixed to the substrate 34; 56 is a lens system 54;
This is a reflecting mirror fixed to the substrate 34 directly below the table 2, and is inclined at 135 degrees with respect to the table 2.

Reference numeral 58 denotes a reflecting mirror fixed to the substrate 34 on the side and opposite to the reflecting mirror 56, and the mirror surface of this mirror is inclined at 45 degrees with respect to the table 2. 60
is a commercially available lens barrel that is screwed into a screw hole in the substrate 34, and a lens system (not shown) is disposed inside this barrel. A cylindrical body 62 is screwed into a screw hole of the substrate 34, and a small diameter portion of the tube 64 is rotatably fitted into this. A shaft rod 66 with a knob that is screwed into a screw hole of the tube body 64 is slidably fitted into an elongated hole 68 provided transparently in the circumferential direction of the tube body 62.
The flange portion is in pressure contact with the outer peripheral surface of the cylindrical body 62. As shown in FIG. 4, screw holes are provided in the side wall of the large diameter portion of the tube body 64 in four directions, and screws 7 are inserted into the screw holes.
0, 72, 74, and 76 are screwed together. Reference numeral 78 denotes a holder placed on the inner bottom surface of the tubular body 64, and an index plate 82 on which an index 80 is drawn on transparent glass is fixed to this holder. A pedestal is in contact with the four sides of the side wall of the holder 78, and the tips of the screws 70, 72, 74, and 76 are rotatably connected to the pedestal.

The tube body 64 and the screws 70, 72, 74, and 76 constitute a fine adjustment mechanism. 84 is a tube fixed to the tube 64, and a polarizing filter 8 is attached to this.
6 is fixed. Reference numeral 88 denotes a tube body that rotatably fits into the inner peripheral surface of the tube body 84, and a polarizing filter 90 and a lens system 92 are fixed to this tube body. The tubular body 88 is fixed to the tubular body 84 with a screw. A lamp case 94 is fixed to the tube body 88, and a socket is fixed to the lamp case, and a light bulb 96 is attached to the socket. Note that the projection device 22 is not particularly limited to an ITV camera.

Next, the operation of this embodiment will be explained.

The light from the light bulb 96 passes through the lens system 92, polarizing filters 90, 86, index plate 82, lens system inside the lens barrel 60, reflecting mirror 58, anti-oblique mirror 56, lens system 54, and half mirror 48, and then reaches the projection device 22. When light enters, the indicator 8 on the indicator plate 82 on the screen 26 of the cathode ray tube
An image of 0 is displayed. On the other hand, the optical image of a linear portion A of 10 mm in length below the lens barrel 36 of the printed circuit board original drawing 100 on the table 2 passes through the lens system and the half mirror 40 to the line scanner camera 2.
0 detection unit 44 is irradiated with light. On the other hand, the part A
The light image near the center of
The vicinity of the center of the read portion A is displayed. The pattern of the linear read portion A of the original drawing 100 is converted into a digitized signal by the detection unit 44,
It is sent to the controller 18. controller 18
The head 16 is reciprocally scanned on the original drawing 100 in a direction perpendicular to the longitudinal direction of the detection section 44, and the head 16 is moved in the direction along the longitudinal direction of the detection section 44 for each scanning movement. 16 is fed in pitches, and the entire surface of the original drawing 100 is scanned by the detection unit 44. By this scanning, the original image 100
The pattern is digitized, with 10 white circles on a black background.
A program is input to the controller so that the XY coordinate values of the center point of 2 are output to the output device. The XY movement amount of the detection section 44 is configured to be counted by a counter in the controller 18 with the center B of the detection section 44 as a reference. In this embodiment, the center B of the detection section 44 is set as the count reference point, but the detection section 44
The reference point is not particularly limited to point B.

Next, the operation of aligning the center of the linear read portion A on the table 2 of the detection unit 44 with the center of the index 80 on the table 2 will be described. Original drawing 1 by automatic operation of scanner camera 20
00 origin 0, XY of any white circle 102 from 0
Let the coordinate values be X1 and Y1. First, controller 1
Switch 8 to manual reading, set head 16 to origin 0,
0 and operate the manual switch 28 to move the head 16. At this time, head 16
While viewing the display of the display unit 30 for the amount of XY movement, the display is adjusted to X1 and Y1, and the head 16 is stopped. At this time, the white circle 102 appearing on the screen 26
If the center of and the center of index 80 do not match,
Rotate the screws 70, 72, 74, and 76 of the fine adjustment mechanism to finely adjust the holder 78 in a desired direction within a plane parallel to the two surfaces of the table, and then adjust the index 80.
Align the center of the white circle with the center of the white circle 102. As a result, the image of the center of the reading portion A on the table 2 of the detection unit 44 and the image of the orientation point of the index 80 on the table 2 at the center completely match on the screen 26. That is, the XY coordinate axis reference for automatic coordinate reading by the scanner camera 20 and the XY coordinate axis reference for manually operated coordinate reading by the ITV camera 22 match. Note that the detection unit 44 of the scanner camera 20
The specific mechanism for matching the X-Y coordinate axis reference assumed on the table 2 between the count reference point and the center of the index 80 can have various structures. The present invention is not limited to the structure of the fine adjustment mechanism.

Next, another embodiment of the present invention will be described with reference to FIG.

A table 104 is composed of a frame and a transparent plate, and both ends are supported by a base 106. Reference numerals 108 and 110 designate X rails, and rack gears are carved along the longitudinal direction on the sides of these rails. Reference numerals 112 and 114 designate X cursors, which are movably connected to the X rails 108 and 110 via rollers. X motors 116 and 118 are attached to the X cursors 112 and 114, respectively, and pinion gears 120 and 122 connected to the output shafts of the X motors 116 and 118 mesh with the rack gears. Reference numeral 124 denotes a Y rail installed over the X cursors 112, 114, to which a carrier 126 is movably attached. When the Y motor 128 attached to the carrier 126 is driven, the carrier 12
6 moves along the Y rail 124, and the X motor 1
16, 118, the X cursor 112,
114 is configured to move along the X-rails 108,110. 130 is X cursor 1
12 and 114, to which a cursor 132 is movably attached.
The carrier 126 and the cursor 132 are connected to wire ropes 134 and 13 that are stretched around a double pulley that is rotatably supported by the X cursors 112 and 114.
6, 138, and 140, they are connected to each other so as to move in the same direction. The motors 128, 11
6,118 is configured to be controlled by a controller. The carrier 126 has a sixth
The head 142 shown in the figure is attached and the cursor 1
A head 144 is attached to 32. 6th
In the figure, 150 is a line scanner camera;
52 is an imaging lens, which is connected to the head 1
It is supported by 42 substrates. 154 is a light source for an index, 156 is a lens, 158 is an index plate, 160 is a half mirror, 162 is an imaging lens, 164 is a
A projection device consisting of an ITV camera, 166 an illumination lens, and 168 an illumination light source are supported by the substrate of the head 144.

In the above configuration, the center of the light entrance part of the projection device 164 and the detection part 170 of the scanner camera 150 are
The centers of the index plates 158 and 158 are set on the same axis, and the index plate 158 The position of is set. Figure 7 shows
This figure shows another embodiment in which the designated point on the index table and the count reference point of the read portion on the table of the detection unit of the scanner camera are matched. In the figure, 172 is a line scanner camera, 174 is an imaging lens, 176 is a half mirror, 178 is a reflecting mirror, 180 is a half mirror, 1
82 is a lens system, 184 is a projection device, 186 is an index plate, 188 is a lens system, 190 is a light source,
These are supported by a substrate of head 142 which is connected to carrier 126. 192 is a light source, and 194 is a condensing lens, which are supported by the substrate of the head 144 connected to the cursor 132.

In the above configuration, the image of the index on the index plate 186 enters the projection device 184 via the half mirror 180 and the lens 182, while the optical image of a predetermined portion on the table 104 passes through the half mirror 176 and the imaging lens 174. Via Line Scanner Camera 172
The light is irradiated onto the detection unit of the reflector 178,
The light enters a projection device 184 through a half mirror 180 and a lens 182. Sukiyana camera 172
The position of the indicator plate 186 is appropriately set so that the center of the read portion on the table 104 of the detection unit, that is, the count reference point, coincides with the indicated point on the table 104 of the center of the indicator 186.

As described above, the present invention accurately matches the point on the table to which the reference point of the detection unit of the scanner camera that corresponds to the display position of the counter is directed, and the point on the table to which the center of the index points. There are effects that can achieve the stated purpose.

[Brief explanation of drawings]

The figures show preferred embodiments of the present invention, with Fig. 1 being an external view, Fig. 2 being an external view of the operation console, Fig. 3 being a sectional view of the head, Fig. 4 being a partial sectional view, and Fig. 5. FIG. 6 is an explanatory front view showing another embodiment, FIG. 7 is an explanatory diagram showing another embodiment, and FIG. 8 is a schematic diagram of a printed circuit board. 2...Table, 4,6...X rail, 8,1
0...X cursor, 12...Y rail, 14...
carrier, 16... head, 18... controller,
20...Line scanner camera, 22...ITV
Camera, 26... Braun tube, 44... Light detection section, 54... Lens system, 56... Reflector, 58...
...Reflector, 80...Indicator.

Claims (1)

[Claims] 1 A scanner camera 20 attached to the head 16, which is equipped with a head 16 that is movable in the XY coordinate axis directions relative to the table 2, and a detection section 44 that converts the pattern of the drawing on the table 2 into a digitized signal. and a counter that counts the amount of movement of a predetermined reference point of the detection unit 44 in the XY coordinate axis direction, and a numerical control mechanism that automatically controls the head 16 relative to the table 2. A holder 78 disposed on the head 16 holds an image of the index 80, and displays the image on the table 2 together with the image of the index 80 on the screen 2.
6, a projection device 22 disposed on the head 16, and a manual operation switch 2 for driving the head 16 to any position on the table 2.
8, and the detection unit 4 of the scanner camera 20
4. An automatic coordinate reader characterized in that the center of the image of the index 80 is made to coincide on the screen 26 with the image of one point on the table 2 corresponding to the reference point No. 4.