JPS58115587A - Read pitch indicating device in coordinate reader - Google Patents

Abstract

PURPOSE:To read easily coordinate of a curved line, by indicating a signal, which indicates whether the length from a point of a line on a drawing to the preceding read point is proper or not, when the coordinate value of this point of the line on the drawing is read. CONSTITUTION:When the operator moves a read head along the line is the right direction, a counter 40 supplies the X coordinate from a current point B of an index to one input terminal of a comparing part 50. DELTAx1 is inputted to the other input terminal of the comparing part 50. The X coordinate value form the current point B of the index and the absolute value of DELTAx1 are inputted to a data axis display 60 through an AND circuit 54. A red lamp is lit if this difference is <=1mm. which corresponds to the extent of movement of the head, and a yellow lamp is lit if it is <0.5mm., and a green lamp is lit if it is <0.1mm..

Description

DETAILED DESCRIPTION OF THE INVENTION In coordinate reading, when measuring or reading the coordinate values of a certain point on a drawing, the distance of this point to the previous reading point, that is, the reading pitch, is appropriate. The present invention relates to a device for producing a signal indicating whether or not the present invention is carried out.

A conventional method for reading and compiling coordinate points will be explained with reference to FIG. First, the center of the index of the reading head is aligned with the coordinate point A of the line on the drawing.

Then, when the record button on the console is pressed, the X-Y coordinate values from the origin of the reading head are output from the main counter to the output device.

Next, while looking at the X count display on the main counter,
The reading head is moved by a predetermined pitch amount P in the direction of the coordinate axis, and the reading head is also moved in the direction of the Y coordinate axis to move the index of the reading head to point B, and output the coordinate value of the point B. In this way, when reading the coordinate points C, D, E, F, and G sequentially based on the pitch amount P in the X coordinate axis direction, the class length between the reading points increases as the slope of the line becomes steeper. You end up doing it. When reading the coordinate values of a line, it is desirable that the line lengths between the reading points be approximately equal.

However, if the reading pitch is set using one of the X and Y coordinate axes as a reference, there is a defect that the distance between FG becomes longer than the distance between AB as described above. The above defect can be removed by setting the pitch of the reading point by taking into account the amount of movement in both the X and Y axes during the reading operation. Memorize the two values, the value and the Y coordinate value,
These two values must be compared with the X and Y coordinate values of the currently displayed value to determine the appropriate pitch amount, which is actually impossible. In reality, the operator roughly reads and corrects the line lengths between the weir points so that they are almost the same, but there is a flaw that causes inaccuracy.

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

The structure of the present invention will be explained in detail below based on the embodiment shown in the attached drawings. Reference numeral 02 denotes a reading head, on which an ITV camera 4 is mounted, and the structure of the present invention is shown on the mounting table 6 by the Mukuro ITV camera 4. The conceit of the index 8 placed in front of the lens of the ITV camera 4
It is also configured to be displayed on both sides of the monitor TV 10. Incidentally, the indicator 8 is constituted by a cross-shaped black line drawn on a transparent plate. The operation console 12 has a +X switch for rapid feed.

A switch group 14 consisting of a -X switch, a +Y switch, and a -Y switch, a slow feed dial X switch 16, and a transport 9 dial Y switch 18 are provided. When the +X switch in the switch group 14 is pressed, a high-speed plus direction pulse is supplied to the X pulse motor, and YL
/-rail 20 moves at high speed along the X rail 22.22 in the direction of the +X coordinate axis. - If you press the X switch, Y rail 2
0 moves at high speed in the direction of the -xw1 axis. Said +Y
When the switch is pressed, high-speed pulse motor is supplied to the Y pulse motor, and the reading head 2 moves at high speed along the Y rail 20 in the direction of the +Y coordinate axis.When the -Y switch is pressed, the reading head 2 moves along the Y rail 20. Move at high speed in the direction of the -Y coordinate axis. When the X switch 16 is rotated to the right, a low-speed plus direction pulse is supplied to the X pulse motor, and the Y rail 20 moves at low speed in the +X coordinate axis direction, and when it is rotated to the left, the X rail 20 moves in the -YX coordinate axis direction. Move at low speed. Similarly, when the Y switch 1B is turned to the right, the reading head 2 slowly moves along the X rail 20 in the +YX coordinate axis direction, and when turned to the left, the reading head 2 slowly moves along the - Move in the YX coordinate axis direction. The movement of the Y rail 20 along the X rail 22 is converted into directional pulses by the X encoder 24, which pulses are counted by the current X absolute counter 26 and displayed on the display 28. The moving movement of the read head 2 along the X rail 20 is converted into directional pulses by the Y encoder 50 and counted by the current X absolute counter 52 and displayed on the display device 2.
8 is displayed. When the record switch 34 is pressed, the contents of the counters 26 and 32 are output to the output device, and the contents of the counter 26 are set in the previous X atter 58. 40 is 69 in the current X incremental counter,
Subtraction of data supplied to input terminal A and input terminal B (A-B
). 42 is a current X incremental counter, which is used to subtract data (A-B) supplied to input terminal A and input terminal B. 44
is a previous X incremental counter, and when the record switch 54 is turned on, the contents of the Tsumugi current X incremental counter 40 are input as data and are stored in memory. 46 is a MY incremental counter, and when the record switch 54 is turned on, the contents of the current X incremental counter 42 are input as data, and there is a section below for storing this in memory. 48
is a comparator, which compares the data of the input terminals A' and B', and if A'>B', the output terminal outputs %11, and if B'>A', the output m1)L"11 50.52 is a comparison section, 54.
56 is an AND gate circuit, 58 is an OR circuit, and 6o is a pitch correction amount display device, and the above devices and circuits are connected as shown. The reading head 2 may be moved manually, and a projector, magnifying glass or the like may be used instead of the ITV camera.

Next, the operation of this embodiment will be explained.

First, referring to FIG. 4, the operation of reading each point on line l will be explained.

The operator operates the switch group 14 to move the reading head 2 and align the center of the index 8 with point A. The movements of the read head 2 are converted into directional pulses by the encoder 24.30, and the cough pulses are converted into directional pulses by the counter 26.
．． It is counted to 32 and displayed on the display device 28. Next, when the record switch 34 is pressed, the X and Y coordinate values of point A with respect to the origin are outputted to the output device, and the XJI target value of point A is set in the counter 66.
The Y coordinate value is set in the counter 58. Next, the operator moves the reading head 2 along line 1, and stops moving the reading head 2 when the amount of movement of the index 8 in the X coordinate axis direction from point A becomes P. The above value of P is determined by the operator based on the state of the curve of line l and the display device 2.
While looking at the display in step 8, determine the most suitable value in consideration of the line length AB. At this time, the counter 40 calculates the following: X coordinate value of point B - X coordinate value of point A = length j of line AB in the X coordinate axis direction
xl is calculated, and the counter 42 calculates the length Δy1 of the line AB in the direction of the X coordinate axis. When the record switch 34 is pressed here, the values of Δx1 and Δy1 are supplied to the previous X incremental counter 44 and the previous Y incremental counter 46, and are stored therein.

The Y coordinate 1st axis is the front X absolute counter 56 and the front Y
It is set in the absolute counter 58. Then, the contents of the current X, Y absolute counter 26.32, that is, the X, Y coordinate values of point B are outputted to the output device and recorded on a recording medium such as a tape. Further, the output of Δx1 of the counter 44 is input to the A'' of the comparator 48, and the output of jyl of the counter 46 is input to the B input of the comparator 48, where the magnitudes of Δx1 and jyl are compared. The o'3 comparator 48 is Δ
x1) Determine the value of jyl and extract %11 from the output end.
The gate of the AND gate circuit 54 becomes conductive. Next, operator Hiro moves the reading head 2t to the right along line 1. At this time, the turtle counter 40 supplies the X coordinate value of the current position of the finger @S from point B to one input end of the comparison unit 50. Δx1 is input to the other input terminal of the comparison gso. The absolute value of the difference between the X coordinate value of the current position of the index 8 from point B and Δx1 is inputted to the data axis display device 60 via the AND circuit 54, and the above difference is calculated as the head movement amount 1. If the amount is less than 15 haze, the red lamp will be lit blankly, if it is less than 15 haze, the yellow lamp will be lit, and if it is within α1■, the green lamp will be lit.0 For operators, the display device 600 lamp will be lit. Roughly align the center of finger I18 with lie/l and move the reading head 2 to the right along line l until the red lamp lights up, then reduce the moving speed of the reading head 2. When the green lamp lights up, the reading head 2 is stopped. At this time, the X coordinate value Δx2 of point C on line l located at the center of index 8 from point B is:
This value is almost the same as m-th Δx1. In this way, A.

Read points B, C, E, and F. At point F, Δ
When x5 <Δy5, the output terminal 4 of the comparator 48
8& is 101. The output end 48b becomes the tortoise 11, the gate of the AND circuit 54 is cut off, and the gate of the AND circuit 56 becomes conductive. As a result, the next pitch amount is Δy
5 is the standard. When the index 8 is moved to the upper right along line l, the current Y incremental counter 42
inputs the amount of movement of the index 8 in the Y coordinate axis direction from the current point F to one input end of the comparing section 52, and the front Y incremental counter 46 compares the data of Δy5 g52.
input to the other input end of the .

While watching the lamp of the display device 600, the operator stops the reading head 2 when the green lamp lights up, and presses the record switch 34 to record the X and Y coordinate values of the point G' indicated by the index 8 at this time. In this way,
Read each point sequentially as H'l I'. If each point on line 1 is read using only the pitch amount in the Xllll1ll axis direction as a reference, the line length between the reading points after point F will become abnormally long. The output of the OR circuit 58 of this device can also be used in a coordinate reader equipped with an automatic line tracking device in which the reading head automatically tracks the line 1. In this case, the OR circuit 5B is provided with a zero detection circuit 65 as shown in FIG. The operator only needs to set the initial pitch, and then when the output of the OR circuit 5B becomes zero, the zero detection circuit 65 operates, the cough circuit 65 automatically outputs a record command signal, and the X of the reading head is activated. −
The amount of Y movement is output to the output device.

Since the present invention is configured as described above, there is an advantage that the coordinates of the curved line can be easily read so that the line lengths between the respective reading points of the curved line are approximately equal.

[Brief explanation of the drawing]

Fig. 1 is an overall external view, Fig. 2 is a front view of the operation console, Fig. 5 is a block circuit diagram, Fig. 4 is an explanatory diagram, and tJgS diagram is an explanatory diagram showing another embodiment.02... Reading head 6
...Placement stand 8...Indicator 20...X rail
22...X rail 24...X encoder 2
6...X applied counter 28...Display device 50...Y encoder 52...Current Y
Abbreviation counter 54...Record switch 66...Previous X Abbreviation counter 58
... Y absolute counter p-40 ... Current X incremental counter 42 ... Current Y incremental counter 44 ... Previous X incremental counter 46 ... Previous Y incremental counter 48 ... Combare fi 50.52・
・Comparison section

Claims (1)

[Claims] 1) @ Placement table 6, a reading head 2 equipped with an index 8 that is relatively movable in a direction in a plane parallel to this, and the origin of the scissors reading head 2 with respect to the writing table 6. a current X absolute counter 26 that counts the amount of movement in the direction of the X coordinate axis; a record switch that generates a command to output the contents of the counters 26 and 520 of the reading head 2 to an output device; and an operation signal for the record switch. By the current X absolute counter 26
, 5268, the contents of the scissor stitch counter 56, and the contents of the current X absolute counter 26, calculate the increase amount ΔX of the current position of the index 8 in the X coordinate axis direction with respect to the previous reading point. A current X incremental counter 42 that calculates an increase amount Δyt in the Y coordinate axis direction with respect to the previous reading point of the current position of the index 8 based on the current X incremental counter 40, the contents of the PAY absolute counter 58, and the contents of the current X absolute counter 52. and a previous X incremental counter 44 and a previous Y incremental counter 46 that memorize the ΔX and Δy signals of the current X incremental counter 40 and 42 according to the operation signal of the record switch, and the output data of the current X incremental counter 40. , a first comparison unit 50 that detects a difference between the output data of the previous X incremental counter 44 and outputs the difference signal to the first gate circuit 54.
, the output data of the current X incremental counter 42 , the previous Y incremental comparison unit 52 , the contents ΔX of the previous X incremental counter 44 , and the contents Δy of the previous Y incremental counter 46 are determined. , when ΔX is greater than 41, outputting a signal that makes the first gate 54 conductive;
When ΔX is smaller than Δy, the second gate 56
A comparator 48 which outputs a signal that makes the signal conductive, and a reading pitch indicating device for the coordinate reader.