JPH0230070B2 - KEISUKI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> The present invention relates to a counter, and more particularly, to a counter capable of counting objects to be measured whose location and number are uncertain.

<<Prior art>> Conventionally, in order to measure the number of holes in an object to be measured, for example, a board with multiple holes, a light receiving section receives the light emitted from a light beam using a CCD camera, etc., and the presence or absence of light is detected by a microcomputer. This was done through a device that transmitted and stored information. That is, the substrate is passed straight horizontally between the light sources and the light receiving section which are arranged vertically. In this device, light from areas with holes reaches the light receiving section, while light from areas without holes is blocked and does not reach the light receiving section. The presence or absence of this light reception is used as information for each point on the object to be measured, which is scanned in a dot-width slice in a direction perpendicular to the direction of movement of the object to be measured, and is transmitted from the light receiving section to a microcomputer and stored. Next, the image on the storage device is sequentially scanned by raster scanning, and one pixel is found and labeled. Next, the same label is attached to pixels within 8 neighborhoods of this labeled pixel, and when there are no more pixels to be newly labeled, the same label is assigned to one connected pixel. When there are no more pixels to be newly labeled, the scan is performed again, and when a pixel with no label is found, a new label that has not been used before is attached, and the same label is again attached to the pixels within the 8-neighborhood. attach By repeating this process,
A method such as a so-called labeling algorithm is used in which the number of labels used for labeling becomes the number of holes on the object when all dot images on the object to be measured have been scanned.

Also, if the width of the board is larger than the CCD camera,
If multiple CCD cameras are installed consecutively in a direction perpendicular to the direction of board movement, and the pixels at the end scanned by the CCD cameras are labeled pixels, the adjacent CCD
The same label is attached to the pixels at the end of the scan by the camera, the labeling continues and the same label is attached to the pixels within the 8-neighborhood, and when there are no more pixels to be newly labeled, one connected pixel has the same label. Assign labels to multiple CCD cameras in one
A microcomputer was used to identify the CCD camera and count the number of holes on the object being measured.

<<Problems to be Solved by the Invention>> In the conventional method, the object to be measured is irradiated with light from a light source, the light is received by the light receiving section, and then the presence or absence of light reception for all the assumed dots on the object to be measured is measured using a micrometer. It must be stored in the computer, and
Required multiple computer software for labeling. Furthermore, repeated scanning and labeling required a large amount of counting time. Also, multiple
When measuring with a CCD camera, the adjacent CCD
Additional counting time was required to perform processing between cameras.

≪Means for Solving the Problems≫ The present invention is capable of identifying and measuring the presence or absence of a measurement target of a measured object when the measured object passes, and digitizing and transmitting the data. A measuring section that scans sequentially in the cross direction is provided with a plurality of light receiving sections so that the end light receiving elements of adjacent measuring sections overlap with each other in the direction of movement of the object to be measured, and a digital sensor that each measuring section measures. A storage section that stores signals sequentially in the scanning direction and a digitized signal measured by the end light receiving element are input,
It consists of a counting section that inputs the scanning signal of each measuring section and the stored pre-scanning signal, compares it, and counts it, and a display section that displays the counting results.
If the input digitized signal from the end light receiving element measures the measurement target of the object to be measured, it is subtracted, and the input signal for each scan and the stored signal from the previous scan measure the measurement target. By providing a counter, which is characterized in that it subtracts the signal when it becomes a signal that is not measured, and adds it when the signal for each scan measures the object to be measured.
The purpose is to solve the above-mentioned problems.

(E) Effect In this invention, the object to be measured is conveyed between the light source and the signal measuring section, and the presence or absence of light from the light source is detected by a plurality of counting sections installed in a direction crossing the moving direction of the object to be measured. Scan as much as possible. The number of holes can then be counted by comparing each row of signals scanned by each measuring section with the signals from the previous row, and by checking the signals at the end of each measuring section in the scanning direction. Compared to counting the number of holes using methods such as labeling algorithms, it is possible to count the number of holes in a shorter time and without the need for complicated computer software.

(f) Examples Examples of the present invention will be described below based on drawings showing examples of the present invention.

FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are parts diagrams of the same, and FIGS.
FIG. 5 is an explanatory diagram of the counting method.

1 is a light source. Light source 1 is a linear light source.
2 is a light receiving section, and the light receiving section 2 is arranged vertically above the light source 1 as shown in FIG. Further, the light source 1 is installed in such a manner that there is nothing blocking the light emitted from the light source 1 from reaching the light receiving section 2 .

3 is a transport device, and 4 is an object to be measured. In this embodiment, the object to be measured 4 is a substrate for electronic equipment with a plurality of holes, and the object to be measured is the holes formed on the substrate. The light from the light source 1 is blocked by the part of the object to be measured 4 that is conveyed between the light source 1 and the light receiving part 2 and has no holes, so that the light does not reach the light receiving part 2, and the holes are In the open areas, light from the light source 1 reaches the light receiving section 2. At this time, the light receiving unit 2 receives light for at least the width of the object to be measured 4 on the object to be measured 4 in a direction perpendicular to the direction of movement of the object to be measured 4, for example, in a direction perpendicular to the direction of movement of the object to be measured, Since the object to be measured 4 is sequentially moved by the transport device 3, the light receiving section 2 scans the object to be measured 4. As shown in FIG. 3, the light receiving section 2 is a measurement section 2a formed by arranging a plurality of light receiving elements 5 in parallel.
2e, and are formed in a direction crossing the conveying direction of the object to be measured 4 so that the light receiving elements 5a to 5d at the ends of the adjacent measuring sections 2a to 2e overlap with each other in the conveying direction of the object to be measured 4. By doing so, it is possible to count objects 4 to be measured whose width is larger than that of one measuring section 2a. Each measuring section 2a to 2e of the light receiving section 2 regards the object to be measured 4 as a collection of dots, and
The entire width of the object to be measured 4 can be scanned by digitizing and transmitting the presence or absence of light for each dot for a width of .about.2e as 1 when light is received and 0 when no light is received.

6 is a storage section. The storage unit 6 sequentially stores the signals transmitted from the light receiving unit 2 for each width scanned by the light receiving unit 2. At this time, the signal from the light receiving section 2 is digitized, and each collection of dots is stored as if it were on the object to be measured 4.
Furthermore, the signals currently being scanned by the input end light receiving elements 5a to 5d are transmitted to the counting section 7. In this embodiment, the storage unit 6 stores that when scanning a collection of dots in the width direction of the object to be measured 4 is one line, the light receiving elements 5 at the ends of each of the measurement units 2a to 2e are connected to each other on the object to be measured.
Input signals of one line of width arranged in parallel in the conveyance direction are accumulated, but if more lines can be accumulated, it is possible to count the holes. By using a filter or the like for the signal, it is also possible to process the shape of the hole.

7 is a counting section, and 11 is a display section. As shown in FIG. 2, the counting section 7 includes each measuring section 2a to 2e.
For AND gates 8a to 8e, flip-flop circuits 9aa to 9ae, flip-flop circuits 9ba
9be and flip-flop circuits 9c to 9e, and further includes a counting counter 10. One input terminal of the AND gate 8a of the counting section 7 is electrically connected to the signal output terminal of the measuring section 2a,
Further, the other input terminal is connected to the signal output terminal of the storage section 6 in a conductive state. On the other hand, the output terminal of the operation result of the AND gate 8a is connected to the flip-flop circuit 9ba.
Connect to the input end of the terminal for continuity. The output of the flip-flop circuit 9ba is the counting counter 1.
0 input and conductive state, counting counter 1
Enable signal output to 0. The input terminal of the flip-flop circuit 9aa is electrically connected to the signal output terminal of the measuring section 2a, and the output terminal is electrically connected to the counting counter 10, so that the signal from the measuring section 2a
It becomes possible to output a signal to the counting counter 10. One input terminal of the AND gate 8b is electrically connected to the signal output terminal of the measuring section 2b, and the other input terminal is electrically connected to the signal output terminal of the storage section 6.
On the other hand, the output terminal of the calculation result of the AND gate 8b is
It is electrically connected to the input terminal of flip-flop circuit 9bb. And flip-flop circuit 9
The output of bb is electrically connected to the input of the counting counter 10 to enable signal output to the counting counter 10. The input terminal of the flip-flop circuit 9ab is electrically connected to the signal output terminal of the measuring section 2b, and the output terminal is electrically connected to the counting counter 10.
It becomes possible to output a signal to 0. One input terminal of the AND gate 8c is electrically connected to the signal output terminal of the measuring section 2c, and the other input terminal is electrically connected to the signal output terminal of the storage section 6. On the other hand, the output terminal of the operation result of AND gate 8c is electrically connected to the input terminal of flip-flop circuit 9bc. The output of the flip-flop circuit 9bc is electrically connected to the input of the counting counter 10, so that a signal can be outputted to the counting counter 10. The input end of the flip-flop circuit 9ac is electrically connected to the signal output end of the measuring section 2c, and the output end is electrically connected to the counting counter 10, so that the signal can be output to the counting counter 10 in response to the signal from the measuring section 2c. . One input terminal of the AND gate 8d is electrically connected to the signal output terminal of the measuring section 2d, and the other input terminal is electrically connected to the signal output terminal of the storage section 6. On the other hand, the output terminal of the operation result of the AND gate 8d is electrically connected to the input terminal of the flip-flop circuit 9bd. The output of the flip-flop circuit 9bd is electrically connected to the input of the counting counter 10, so that a signal can be outputted to the counting counter 10. The input terminal of the flip-flop circuit 9ad is electrically connected to the signal output of the measuring section 2d, and the output terminal is electrically connected to the counting counter 10, so that the signal can be outputted to the counting counter 10 in response to the signal from the measuring section 2d. and gate 8
One input end of e is electrically connected to the signal output end of the measuring section 2e, and the other input end is connected to the signal output end of the measuring section 2e.
Connect to the signal output terminal of the terminal for continuity. On the other hand, the output terminal of the operation result of the AND gate 8e is electrically connected to the input terminal of the flip-flop circuit 9be.
The output of the flip-flop circuit 9be is electrically connected to the input of the counting counter 10, so that a signal can be outputted to the counting counter 10. The input terminal of the flip-flop circuit 9ae is electrically connected to the signal output terminal of the measuring section 2e, and the output terminal is electrically connected to the counting counter 10, so that the measuring section 2e
With this signal, the signal can be output to the counting counter 10. The flip-flop circuit 9c controls the counting counter 10 when the signal sent from the end light receiving element 5a of the measuring section 2a, which overlaps the measuring section 2a and the measuring section 2b from the storage section 6 in the conveying direction of the object to be measured 4, is 1. Outputs a signal to subtract 1 from . The flip-flop circuit 9d includes an end light receiving element 5 of the measuring section 2b where the adjacent measuring section 2b and the measuring section 2c from the storage section 6 overlap in the conveying direction of the object to be measured 4.
When the output signal b is 1, a signal is output to the counting counter 10 to subtract 1. The flip-flop circuit 9e outputs a counting counter 10 when the output signal from the end light receiving element 5c of the measuring section 2d, where the adjacent measuring section 2c and the measuring section 2d from the storage section 6 overlap in the conveying direction of the object 4, is 1. Outputs a signal to subtract 1 from . The flip-flop circuit 9f connects the adjacent measuring section 2d and measuring section 2e from the storage section 6, respectively.
and a measuring section 2d that overlaps in the conveying direction of the object to be measured 4.
When the output signal of the end light receiving element 5d is 1, a signal is output to the counting counter 10 to subtract 1. In the counting counter 10, the flip-flop circuit 9
A positive count is performed by the signals from aa to 9ae, and 1 is added, and by the signals from the flip-flop circuits 9ba to 9be,
Perform a negative count and subtract 1. Similarly, signals from flip-flop circuits 9c to 9f are used to perform a negative count and subtract 1.

Therefore, in the AND gates 8a to 8e of the counting section 7,
The signals currently being transmitted by the measurement units 2a to 2e of the light receiving unit 2 and the signal of one line before stored in the storage unit 6 are synchronized and input. At this time, the storage unit 6 transmits the signal of one line before to the counting unit 7 and erases the memory, and at the same time, the signal one line after the line that has been stored so far (the signal that the measurement unit 2 is currently scanning) ) will be memorized. In the counting section 7, when the currently transmitted signal scanned by each of the measuring sections 2a to 2e changes from 0 to 1, the flip-flop circuits 9aa to 9ae generate count pulses and send a signal to the counting counter 10 to add 1. Output.
In addition, the currently transmitted signal and the signal one line before are synchronized and input to the AND gates 8a to 8e.
When the output signals of AND gates 8a to 8e change from 1 to 0, flip-flop circuits 9ba to 9be
generates a count pulse and counts counter 10.
Outputs a signal to subtract 1 from . Further, the signals currently being transmitted by the light receiving elements 5a to 5d at the end portions in the scanning direction of the measuring portions 2a to 2e, in which the ends of the adjacent measuring portions 2a to 2e overlap each other in the conveying direction of the object 4, change from 0 to 1. When you get used to it, flip-flop circuit 9c
A count pulse is generated at ~9f and 1 is subtracted from the counting counter 10.

By performing this operation on all of the objects to be measured 4 and displaying them on the count display section 11, the number of holes can be counted and displayed. Moreover, in this example,
The hole 12 that is the measurement target of the object to be measured 4 is
An example will be described in which the light from the light source 1 is allowed to reach the light receiving section 2, and parts of the object to be measured 4 that are not to be measured block the light from the light source 1. Alternatively, the light source 1 may be blocked from the light receiving section 2 by a part of the object 4 other than the object to be measured, or the light source 1 may be blocked from the object 4 to be measured.
On the other hand, it may be provided on the light receiving section 2 side, and the irradiated light from the light source 1 may be reflected on the surface of the object to be measured 4. In this case, according to the latter reflection method, the counting method is almost the same as in this example, but in the former case,
When the signal currently being scanned changes from 1 to 0,
Generate count pulses in flip-flop circuits 9aa to 9ae, add 1 to count counter 10,
The signal currently being scanned is synchronized with the signal one line before, input to AND gates 8a to 8e, and when the output signals of AND gates 8a to 8e go from 0 to 1, flip-flop circuits 9ba to 9be count. Generate a pulse and count counter 10 to 1
pull. Similarly, a measuring section 2a in which the ends of adjacent measuring sections 2a to 2e overlap each other in the conveying direction of the object to be measured 4
When the signals currently being transmitted by the end light receiving elements 5a to 5d in the scanning direction of 2e change from 1 to 0, the flip-flop circuits 9c to 9f generate count pulses and signal the counting counter 10 to subtract 1. Output. Further, in this embodiment, information on the object to be measured is measured using light, but means other than light, such as the presence or absence of electric current, the difference in magnetic poles, the presence or absence of polarized light, etc. may also be used.

In order to further explain the above in detail, we will take as an example a case where the light receiving section 2 is composed of measuring sections 2a, 2b, and 2c among the measuring sections 2a to 2e. Hole 1 to be measured with arbitrary shape
2 will be counted electrically based on the example. The measuring section 2a measures the front side of the hole 12 in the scanning direction, the measuring section 2b measures the middle part of the hole 12, and the measuring section 2c measures the rear side of the hole 12 in the scanning direction, and sends each signal to the storage section 6. Send. The line of the signal currently being scanned and transmitted is A (hereinafter also referred to as signal A), and the signal from one line before is referred to as B (hereinafter also referred to as signal B).
4a to 4j are diagrams corresponding to the object to be measured 4.

As shown in FIG. 4a, when the current scanning signal advances and reaches point (a), the measuring section 2b transmits the signal received from the light source 1 to the AND gate 8.
b. Send to flip-flop circuit 9ab. This signal then becomes the scanning signal A shown in the lower part of FIG. 4a.
As shown by the scanning signal B of one line before, the scanning signal changes from 0 to 1 and immediately changes from 1 to 0 at the position corresponding to the light receiving element at point (a) of the measuring section 2b. Then, the flip-flop circuit 9ab changes the signal from 0 to 1, generates a count pulse, and outputs a signal to add 1 to the counting counter 10, which in turn increments the counter 10 by 1. At this time, display section 1
1 may be displayed as "1". At the same time, the signal A currently being scanned and the signal B one line before, which corresponds to the signal A stored in the storage section 6, are synchronized and input to the AND gate 8b. B is a signal when the measurement unit 2b has not yet received light, so it is 0, and the signal A currently being scanned changes from 0 to 1 and immediately changes from 1 to 0.
The calculation result is 0. Therefore, AND gate 8b
Flip-flop circuit 9 which inputs the signal from
bb does not generate a count pulse and is not counted by the counting counter 10. Since neither the measurement unit 2a nor the measurement unit 2c receives the light from the light source 1, the signal A currently being scanned does not change from 0 to 1 and remains at 0, and the flip-flop circuits 9aa, There is no signal output to 9ac,
Not counted. Similarly, and gate 8a,
8c as well, signals from the measuring units 2a and 2c and a signal B from the storage unit 6 corresponding to the signal A that is currently being scanned by the measuring units 2a and 2c are inputted, but both of them are The light passing through the hole 12 of the object 4 is not sensed, and the signal remains 0, and no signal is output to the counting counter 10, which outputs an AND signal, and is not counted. In addition, the measuring section 2a
Since the end light receiving element 5a also does not receive light, there is no signal output from the end light receiving element 5a to the flip-flop circuit 9c, so the flip-flop circuit 9c does not output a signal. Similarly, since the end light receiving element 5b of the measuring section 2b also does not receive light, the flip-flop circuit 9d
also does not output a signal. Therefore, the counting result up to the end of the scan shown in FIG. 4a is 1.
Further, in the storage section 6, the signal B of one line before is sent to the AND gate 8a, and at the same time, its memory is erased, and the signal A currently being scanned is newly stored.
Furthermore, when storing this memory, at the same time, the end light receiving elements 5a to 5d of the signal currently being scanned are
The output signal is also outputted to the flip-flop circuits 9c to 9f.

When the scanning progresses further and the state shown in _FIG . 8b, flip-flop circuit 9
Send to ab. Then, the scanning signal changes from 0 to 1 at the position corresponding to point (b ₁ ) of the measuring section 2b, as shown by the scanning signal A in the lower part of FIG. 4b and the scanning signal B one line before. Then, the signal input to the flip-flop circuit 9ab changes from 0 to 1, and the flip-flop circuit 9ab generates a count pulse, outputs a signal to add 1 to the counting counter 10, and the counting counter 10 adds 1. As the scanning progresses further, the current scanning A is 1 until the point (b ₂ ) is reached, and when the point (b ₂ ) is reached, the signal A becomes 0. At this time, the signal B that is one line before the current signal A from the storage unit 6
is 1 from a position slightly behind point (b ₁ ) in the scanning direction to a position slightly before point (b ₂ ) in the scanning direction.
, and from 0 to 1 at a position slightly before the point (b ₂ )
Therefore, in the AND gate 8b, the measuring section 2b
By synchronizing and inputting the currently scanned signal A from , and the signal from the previous line stored in the storage unit 6, and taking an AND, the position slightly after the point (b ₁ ) in the scanning direction is obtained. The calculation output is 1 from point (b ₂ ) to a position slightly before the point in the scanning direction, and (b ₂ )
At a position slightly before the point, the signal from the AND gate 8b changes from 1 to 0. Flip-flop circuit 9
At bb, since the signal from the AND gate 8b changes from 1 to 0, a count pulse is generated and a signal is output to subtract 1 from the counting counter 10, which in turn subtracts 1. At this time, since the signal received by the end light receiving element 5b of the signal A currently being scanned is 0, the flip-flop circuit 9d does not generate a count pulse to the counting counter 10 and the counting counter 10 does nothing. Since neither the measuring section 2a nor the measuring section 2b receives the light from the light source 1, the flip-flop circuit 9aa, the flip-flop circuit 9ac, the flip-flop circuit 9ba, and the flip-flop circuit 9b do not output signals, as described in FIG. 4a. Without,
Counter 10 does not count. Similarly, since the end light receiving element 5a and the end light receiving element 5b do not receive light, the counting from the flip-flop circuit 9c and the flip-flop circuit 9d to the counting counter 10 is also not performed.

As the scanning progresses further, in the state one scan before the state shown in FIG. 4c, the counts related to the measurement units 2a and 2c are similar to the counts in the state shown in FIG. 4b.
The counting method related to the measuring section 2b is different. That is, the fourth
In the state one scan before the state shown in FIG.
The signal A that is currently being scanned in b changes from 0 to 1 at approximately the middle position of the measuring section 2b, and the signal A that is currently being scanned changes from 0 to 1 at approximately the middle position of the measuring section 2b, and
remains 1 until it finishes scanning. On the other hand, the signal B one line before changes from 0 to 1 slightly later in the scanning direction than the currently scanned signal A, and changes from 1 to 0 immediately before the end light receiving element 5b of the measuring section 2b. Therefore, the output signal of the AND gate 8b inputting these signals changes from 0 to 1 slightly later in the scanning direction than the currently scanning signal A, and changes from 1 to 0 immediately before the end light receiving element 5b of the measuring section 2b. become. In response to the signal from the AND gate 8b, the flip-flop circuit 9bb generates a count pulse and outputs a signal to the counting counter 10 to subtract 1, and the counting counter 10 subtracts 1. In addition, the signal A currently being scanned is from 0 to 1 at approximately the middle position of the measuring section 2b.
Therefore, the flip-flop circuit 9ab to which this signal is input generates a count pulse and outputs a signal to add 1 to the counting counter 10, which in turn adds 1. Furthermore, since the end light receiving element 5b of the signal currently being scanned is also 1, the flip-flop circuit 9 to which this signal is input is
d also generates a count pulse and outputs a signal to the counting counter 10 to subtract 1, and the counting counter 10 subtracts 1. The counting method from the state of scanning one line after the state shown in Fig. 4a to the state of scanning one line before the state shown in Fig. 4c is shown in Fig. 4b.
This is the same as counting in . In FIG. 4c, the end light receiving element 5b is receiving light, so the counting state changes from that in FIG. 4b.

That is, in the case of the state shown in FIG. 4c, when the currently scanned signal A reaches the point (c ₁ ), the measuring section 2 receives the signal from the light source 1 and outputs the signal to the AND gate 8b. The signal is sent to flip-flop circuit 9ab. Then, this signal is scanned at a position corresponding to the light-receiving element at point (c ₁ ) of the measuring section 2b, as shown by the currently scanning signal A and the scanning signal B one line before, shown in the lower part of FIG. 4b. The signal goes from 0 to 1. Then, the signal input to the flip-flop circuit 9ab changes from 0 to 1, and the flip-flop circuit 9ab generates a count pulse.
A signal is output to add 1 to , and the counting counter 10 adds 1 to . The scanning further progresses and the measurement unit 2b
The signal A that is currently being scanned is 1 until the end light receiving element b finishes receiving light. At this time, the signal B that is one line before the currently scanned signal A is sent from the storage unit 6.
is 1 until the end light-receiving element 5b finishes receiving light, and the AND gate 8b combines the currently scanned signal A from the measurement section 2b and the signal B of one line before stored in the storage section 6. Synchronize and input, and then take the AND. Then, the calculation output is 1 from the position slightly behind point (c ₁ ) in the scanning direction until the end light receiving element 5b finishes receiving light, and the signal from the AND gate 8b does not change from 1 to 0. , the flip-flop circuit 9bb does not generate a count pulse and does not output a signal to the counting counter 10. At this time, since the signal received by the end light receiving element 5b of the signal A currently being scanned is 1, the flip-flop circuit 9d generates a count pulse to the counting counter 10 and outputs a signal to the counting counter 10 to subtract 1. If the count counter is 10, subtract 1. Since the measuring section 2a does not receive the light from the light source 1, the flip-flop circuit 9aa and the flip-flop circuit 9ba do not output signals and the counting counter 10 does not count, as described in FIG. 4a. Similarly, since the end light receiving element 5a does not receive light, no counting is performed from the flip-flop circuit 9c to the counting counter 10. In the measurement unit 2c, the light from the light source is received at point (c ₂ ), so the flip-flop circuit 9ac changes from 0 to 1 at the same point, and immediately changes from 1 to 0 again.
When the ac signal changes from 0 to 1, a count pulse is generated, a signal is output to the counting counter 10 to add 1, and the counting counter 10 adds 1. In the AND gate 8c, the signal A changes from 0 to 1 at point (c ₂ ) and immediately returns from 1 to 0, as shown in the signal explanation below corresponding to the measuring section 2c in FIG. Signal B corresponding to the measuring unit 2c one line before the scanning of the scanning signal A
Since is always 0, the output of the operation result to the flip-flop circuit 9bc is always 0. Therefore, the flip-flop circuit 9bc does not output a count pulse to the counting counter 10.

When the scanning progresses further and the state shown in _FIG . The signal is sent to gate 8b and flip-flop circuit 9ab. Then, as shown by the scanning signal A shown in the lower part of FIG. 4b and the scanning signal B one line before, the scanning signal A becomes 0 at the position corresponding to the light receiving element at point (d ₁ ) of the measuring section 2b. becomes 1.
Then, the signal becomes 0 in flip-flop circuit 9ab.
becomes 1, and the flip-flop circuit 9ab generates a count pulse and outputs a signal to add 1 to the counting counter 10.
Add. The signal A currently being scanned is 1 until the scanning progresses further and the end light receiving element 5b of the measuring section 2b finishes receiving light. At this time, the signal B one line before the currently scanned signal A from the storage unit 6 is
Since the signal B is 1 from a position slightly behind the point (d ₁ ) in the scanning direction until the end light receiving element 5b finishes receiving light, the AND gate 8b
The signal A currently being scanned from B is input synchronized with the signal B of one line before stored in the storage section 6, and an AND operation is performed. Then, from a position slightly behind point (d ₁ ) in the scanning direction, the end light receiving element 5b
The calculation output is 1 until the light reception is completed, and the signal output from the AND gate 8b is 1 until the scanning is completed. Therefore, in the flip-flop circuit 9bb which receives the signal from the AND gate 8b,
Since the signal from the AND gate 8b does not change from 1 to 0, no count pulse is generated and the counting counter 10 does not count. At this time, the signal received by the end light receiving element 5b of the signal A currently being scanned is 1, so the flip-flop circuit 9d generates a count pulse to the counting counter 10, outputs a signal to the counting counter 10 to subtract 1, and starts counting. At counter 10, subtract 1. Since the measurement unit 2a does not receive light from the light source 1, the flip-flop circuits 9aa and
The flip-flop circuit 9ba does not output a signal, and the counting counter 10 does not count. Similarly, since the end light receiving element 5a does not receive light, no counting is performed from the flip-flop circuit 9c to the counting counter 10. The measuring unit 2c receives the light from the light source at the point (d ₂ ), so the signal of the flip-flop circuit 9ac changes from 0 to 1 at the same point, and the signal changes from 0 to 1 (d ₂ ).
The signal is 1 from point to point (d ₃ ), and the signal changes from 1 to 0 at point (d ₃ ), so when the signal of the flip-flop circuit 9ac changes from 0 to 1, a count pulse is generated. Outputs a signal to add 1 to the counting counter 10, and the counting counter 10 adds 1.
Add. In the AND gate 8c, the signal changes from 0 to 1 at point (d ₂ ) and returns from 1 to 0 at point (d ₃ ), as shown in the signal explanation below corresponding to the measuring section 2c in FIG. 4d. As the scanning signal A is input, it changes from 0 to 1 at point (d ₂ ), and at point (d ₃ )
The calculation is performed by inputting the signal A which is currently being scanned, which changes from 1 to 0 immediately before the point, and the signal B corresponding to the measuring unit 2c one line before. As a result, the output signal from the AND gate 8c to the flip-flop circuit 9bc of the operation result changes from 1 to 0 immediately before the point (d ₃ ), and the flip-flop circuit 9bc changes the output signal from the counting counter 1 to the flip-flop circuit 9bc.
Generates a count pulse at 0 and counts counter 1
For 0, subtract 1.

As the scanning progresses further, the counting between FIG. 4d and FIG. 4e until reaching FIG. 4e is the same as the counting in FIG. 4e.

When _the scanning progresses further and _the state shown in FIG. Since the signal A currently being scanned is 0 and the signal B one line before is also 0, no signal is output to the counting counter 10. Furthermore, at point (e ₁ ), the measurement unit 2b transmits the signal received from the light source 1 to the AND gate 8.
b. Send to flip-flop circuit 9ab. Then, as shown by the scanning signal A of the measuring section 2b in the lower part of _FIG . A goes from 0 to 1. Then, in the flip-flop circuit 9ab, the input signal changes from 0 to 1.
Then, the flip-flop circuit 9ab generates a count pulse and outputs a signal to add 1 to the counting counter 10, which in turn increments it by 1. The scanning progresses further until the end light receiving element 5b of the measuring section 2b finishes receiving the signal A currently being scanned.
is 1. Similarly, the signal B one line before the signal A currently being scanned from the storage unit 6 also remains 1 until the end light receiving element 5b finishes receiving light. Therefore, the AND gate 8b synchronizes and inputs the currently scanned signal A from the measuring section 2b and the signal B of the previous line stored in the storage section 6, and then performs an AND operation. Then, the calculation output is 1 from the point (e ₁ ) until the end light receiving element 5b finishes receiving light, and the signal output from the AND gate 8b is 1 until the end of scanning. Therefore, the flip-flop circuit 9bb which receives the signal from the AND gate 8b does not generate a count pulse because the signal from the AND gate 8b does not change from 1 to 0, and the counting counter 10 does not count. At this time, since the signal received by the end light receiving element 5b of the signal A currently being scanned is 1, the flip-flop circuit 9d generates a count pulse to the counting counter 10 and outputs a signal to the counting counter 10 to subtract 1. If the count counter is 10, subtract 1. At point (e ₂ ), the measurement unit 2c receives light from the light source, so the input signal of the flip-flop circuit 9ac changes from 0 to 1 at the same point, and from point (e ₂ ) to point (e ₃ ) 1, and the signal changes from 1 to 0 at point (d ₃ )
Therefore, when the signal of the flip-flop circuit 9ac changes from 0 to 1, a count pulse is generated and a signal is output to the counting counter 10 to add 1, and the counting counter 10 adds 1. In the AND gate 8c, the current scanning signal changes from 0 to 1 at point (e ₂ ) and returns from 1 to 0 at point (e ₃ ), as shown in the signal explanation below corresponding to the measurement unit 2c in FIG. 4e. At the same time as inputting signal A,
It goes from 0 to 1 at point (e ₂ ), and goes from 1 to 0 just before point (e ₃ ). Input and calculate the signal B corresponding to the measurement unit 2c one line before the currently scanned signal A. . As a result, the AND gate 8 is inserted just before the (e ₃ ) point.
The output signal of the calculation result from c to the flip-flop circuit 9bc changes from 1 to 0, and the flip-flop circuit 9bc generates a count pulse to the counting counter 10, which subtracts 1.

As the scanning progresses further, in the measurement section 2a from the scanning position shown in FIG. 4e to FIG. 4f, the AND gate 8a
In this case, the input signal changes from 0 to 1 when the signal from the measuring section 2a becomes 1, and the scanning signal B changes from 0 to 1 at a position slightly later in the scanning direction after the signal from the measuring section 2a becomes 1. Both the current scanning signal of the end light receiving element 5a and the signal of the end light receiving element 5a scanned one line before the currently scanning signal are 1.
Therefore, the output signal of the AND gate 8a remains 1, and in the flip-flop circuit 9ba,
Since the calculation result, which is the input signal, does not change from 1 to 0, no count pulse is output to the counting counter 10, and as in FIG. 4e, the counting counter 10 does nothing. Other measurement units 2b, 2c and flip-flop circuits 9aa, 9ab, 9ac, 9bb,
9bc, 9c, and 9d are scanned and counted in the same manner as the counting method explained in FIG. 4e, although there are differences in the positions where the signal changes from 0 to 1 and from 1 to 0.

In the situation shown in FIG. 4 f, when the currently scanned signal A reaches point (f ₁ ), the measurement unit 2
At point a, a signal obtained by receiving light from light source 1 is transmitted to AND gate 8a and flip-flop circuit 9aa.
Then, as shown by the signal A and the signal B in the lower part of _FIG . Then, the input signal changes from 0 to 1 in the flip-flop circuit 9aa, and the flip-flop circuit 9aa generates a count pulse and outputs a signal to add 1 to the counting counter 10, which in turn adds 1. At this time, the signal B also changes from 0 to 1 at a position slightly behind the position in the scanning direction where the currently scanned signal A changes from 0 to 1, but the currently scanned signal of the end light receiving element 5a Since both the signals of the end light receiving element 5a scanned one line before the currently scanned signal are 1, the output signal of the AND gate 8a remains 1, and the output signal of the flip-flop circuit 9ba is the input signal. Since the calculation result does not go from 1 to 0, the count pulse is not output to the counting counter 10.
Nothing is done at count counter 10. Further, in the flip-flop circuit 9c, since the signal currently received by the end light-receiving element 5a, which is output at the same time as the storage section 6 stores it, is 1, it generates a count pulse and outputs a signal to the counting counter 10 to subtract 1. For 10, subtract 1. Furthermore,
The measuring section 2b transmits a signal obtained by receiving the light from the light source 1 at the point (f ₂ ) to the AND gate 8b and the flip-flop circuit 9ab. Then, this signal is transmitted to the measuring section 2b, as shown by the scanning signal A of the measuring section 2b in the lower part of FIG.
The scanning signal A changes from 0 to 1 at the position corresponding to the light receiving element at point (f ₂ ). Then, the input signal changes from 0 to 1 in the flip-flop circuit 9ab, and a count pulse is generated in the flip-flop circuit 9ab.
A signal is output to add 1 to the counting counter 10, and 1 is added to the counting counter 10. The signal A currently being scanned is 1 until the scanning progresses further and the end light receiving element 5b of the measuring section 2b finishes receiving light. Similarly, the signal B one line before the currently scanned signal A from the storage unit 6 also remains 1 until the end light receiving element 5b finishes receiving light. Therefore, and gate 8
At step b, the signal A currently being scanned from the measurement section 2b and the signal B from one line before stored in the storage section 6 are synchronized and input, and an AND operation is performed.
Then, after receiving light at point (f ₂ ), the end light receiving element 5
The calculation output is 1 until the point (f ₃ ) at which point b ends receiving light, and the signal output from the AND gate 8b remains 1 until the scanning ends. Therefore, AND gate 8b
Flip-flop circuit 9 which inputs the signal from
At bb, the signal from the AND gate 8b does not change from 1 to 0, so no count pulse is generated, and the counter 10 does not count. on the other hand,
Since the signal currently received by the end light receiving element 5b, which is output at the same time as the storage section 6 stores it, is 1, the flip-flop circuit 9d generates a count pulse to the counting counter 10, outputs a signal to the counting counter 10 to subtract 1, and starts counting. Counter 10 is 1
pull. The measurement unit 2c receives the light from the light source 1, so at the same point, the flip-flop circuit 9ac changes the signal from 0 to 1, and then immediately changes from 1 to 0, so the input signal of the flip-flop circuit 9ac becomes 0.
When it becomes 1, it generates a count pulse and outputs a signal to add 1 to the counting counter 10,
Add 1 to the count counter 10. In the AND gate 8c, the signal A is shown in FIG.
As shown in the signal description below corresponding to , signal B changes from 0 to 1 at point (f ₃ ) and immediately changes from 1 to 0 again, and signal B changes from 1 to 0 slightly later than signal A changes from 1 to 0. Therefore, at the point where the signal A changes from 1 to 0, the calculation result changes from 1 to 0 and is output as a signal to the flip-flop circuit 9bc. In the flip-flop circuit 9bc, by inputting this signal,
Outputs a signal to the counting counter 10 to subtract 1,
If the count counter is 10, subtract 1.

When the scanning progresses further and the state shown in _FIG . The signal is sent to gate 8a and flip-flop circuit 9aa. Then, this signal is transmitted to the measuring section 2, as shown by the signal A and the signal B in the lower part of FIG.
At point (g ₁ ) of a, the scanning signal A changes from 0 to 1. Then, in the flip-flop circuit 9aa, the input signal changes from 0 to 1, generates a count pulse, and outputs a signal to add 1 to the counting counter 10, which in turn increments 1. At this time, the signal B also changes from 0 to 1 at a position slightly behind the position in the scanning direction where the currently scanned signal A changes from 0 to 1, but the currently scanned signal of the end light receiving element 5a Since both the signals of the end light receiving element 5a scanned one line before the currently scanned signal are 1, the output signal of the AND gate 8a remains 1, and the flip-flop circuit 9ba receives the input signal. Since the calculation result does not change from 1 to 0, no count pulse is output to the counting counter 10, and the counting counter 10 does nothing. Further, in the flip-flop circuit 9c, since the signal currently received by the end light-receiving element 5a, which is output at the same time as the storage section 6 stores it, is 1, it generates a count pulse and outputs a signal to the counting counter 10 to subtract 1. For 10, subtract 1. Furthermore, the measuring section 2b transmits a signal obtained by receiving the light from the light source 1 at the point (g ₂ ) to the AND gate 8b and the flip-flop circuit 9ab. Then, this signal becomes a scanning signal at the position corresponding to the light receiving element at point (g ₂ ) of the measuring section 2b, as shown by the scanning signal A of the measuring section 2b below g in Fig. 4 and the scanning signal B of one line before. A is from 0 to 1
become. Then, the input signal changes from 0 to 1 in the flip-flop circuit 9ab, and the flip-flop circuit 9ab generates a count pulse and outputs a signal to add 1 to the counting counter 10, which in turn adds 1. Furthermore, the signal A currently being scanned is 1 up to the position (g ₃ ). Similarly,
The signal B one line before the currently scanned signal A from the storage unit 6 is 1 until slightly before the point (g ₃ ) in the scanning direction. Therefore, in AND gate 8b,
The currently scanning signal A from the measurement unit 2b mentioned above
and the signal B of the previous line stored in the storage section 6 are synchronized and input, and an AND operation is performed. Then,
The signal output from the AND gate 8b changes from 0 to 1 at (g ₂ points) and from 1 to 0 slightly before the (g ₃ ) point in the scanning direction. Therefore, the flip-flop circuit 9bb which receives the signal from the AND gate 8b generates a count pulse just before the point (g ₃ ) at which the signal from the AND gate 8b changes from 1 to 0.
A signal is output to the counting counter 10 to subtract 1. On the other hand, the signal currently scanned by the edge light-receiving element 5b, which is output at the same time as the storage section 6 stores it, is 0, and the flip-flop circuit 9d does not generate a count pulse to the counting counter 10, and the counting counter 10 does not perform counting. Since the measurement unit 2c does not receive light from the light source 1, the flip-flop circuit 9ac and the flip-flop circuit 9bc
does not output a signal and is not counted by the counting counter 10. Similarly, since the end light receiving element 5b does not receive light, no counting is performed from the flip-flop circuit 9b to the counting counter 10.

As the scanning progresses further, in the state one scan before the state shown in FIG. 4h, the counts related to the measurement units 2a and 2c are the same as the counts in the state shown in FIG. 4g, but the counts related to the measurement unit 2b are the same. The methods are different. That is, Fig. 4h
In the state one scan before the state shown in , the signal A currently being scanned by the measuring section 2b changes from 0 to 1 at the same time as the measuring section 2b starts receiving light, and remains 1 until the end light receiving element 5b finishes scanning. . On the other hand, the signal B one line before, like the signal A currently being scanned, changes from 0 to 1 at the same time as the light reception starts, and changes from 1 to 0 immediately before the end light receiving element 5b of the measuring section 2b. Therefore, the output signal of the AND gate 8b inputting these signals changes from 0 to 1 at the same time as the measuring section 2b starts receiving light, and changes from 1 to 0 immediately before the end light receiving element 5b of the measuring section 2b. In response to the signal from the AND gate 8b, the flip-flop circuit 9bb generates a count pulse and outputs a signal to the counting counter 10 to subtract 1, and the counting counter 10 subtracts 1. Furthermore, since the signal A currently being scanned changes from 0 to 1 at the same time as the light reception starts, the flip-flop circuit 9ab that outputs this signal generates a count pulse and outputs a signal to add 1 to the counting counter 10, and then performs counting. For counter 10, add 1. Furthermore, since the edge light receiving element 5b of the signal currently being scanned is also 1, the flip-flop circuit 9d to which this signal is input also generates a count pulse and outputs a signal to the counting counter 10 to subtract 1. For 10, subtract 1. Also, the fourth
The counting method between the state after one scan shown in FIG. f and the state before two scans shown in FIG. 4 h is the same as the counting method at the position shown in FIG. 4 g.

When the scanning progresses further and the state shown in _FIG . The signal is sent to gate 8a and flip-flop circuit 9aa. Then, this signal is transmitted to the measuring section 2, as shown by the signal A and the signal B in the lower part of FIG.
At point (h ₁ ) of a, the scanning signal A changes from 0 to 1. Then, the input signal changes from 0 to 1 in the flip-flop circuit 9aa, and the flip-flop circuit 9aa generates a count pulse and outputs a signal to add 1 to the counting counter 10, which in turn adds 1. At this time, the signal B also changes from 0 to 1 at a position slightly before the position in the scanning direction where the currently scanned signal A changes from 0 to 1, and the end light receiving element 5a
remains 1 until the end of light reception, and the end light receiving element 5a
Since the signal currently being scanned and the signal of the end light receiving element 5a scanned one line before the currently scanning signal are both 1, the output signal of the AND gate 8a remains 1, and the flip-flop circuit 9
In ba, since the calculation result, which is the input signal, does not change from 1 to 0, no count pulse is output to the counting counter 10, and the counting counter 10 does nothing. Further, in the flip-flop circuit 9c, since the signal currently received by the end light-receiving element 5a, which is output at the same time as the storage section 6 stores it, is 1, it generates a count pulse and outputs a signal to the counting counter 10 to subtract 1. 1 in 10
pull. Furthermore, the measuring section 2b transmits a signal obtained by receiving the light from the light source 1 at the point (h ₂ ) to the AND gate 8b and the flip-flop circuit 9ab.
Then, this signal is transmitted to the measuring section 2b shown in the lower part of Fig. 4h.
As shown by the scanning signal A of 1 and the scanning signal B of one line before, the scanning signal A changes from 0 to 1 at the position corresponding to the light receiving element at the point (h ₂ ) of the measuring section 2b. Then, the input signal changes from 0 to 1 in the flip-flop circuit 9ab, and the flip-flop circuit 9ab generates a count pulse and outputs a signal to add 1 to the counting counter 10.
Add. Furthermore, the signal A currently being scanned is 1 up to the position (h ₃ ), which is the light receiving position of the end light receiving element 5b. Similarly, the signal B one line before the currently scanned signal A from the storage unit 6 is also transmitted to the light receiving element 5.
It is 1 up to point (h ₃ ) at the light receiving position b. Therefore, when the AND gate 8b synchronizes and inputs the currently scanned signal A from the measurement section 2b and the signal B from one line before stored in the storage section 6, and then takes the AND, Its output is always 1, so it does not change from 1 to 0. Therefore, and gate 8
Flip-flop circuit 9 inputting the signal from b
At bb, since the signal B1 does not become 0, no count pulse is generated and no signal is output to the counting counter 10. On the other hand, the signal currently scanned by the end light receiving element 5b, which is output at the same time as the storage section 6 stores it, is 1, and the flip-flop circuit 9b inputs the signal from the end light receiving element 5b and subtracts 1 to the counting counter 10. A signal is output, and the counting counter 10 subtracts 1. In the measurement unit 2c, the light from the light source is received at point (h ₃ ), so the signal of the flip-flop circuit 9ac changes from 0 to 1 at the same point, and immediately changes from 1 to 0 again, so the signal of the flip-flop circuit 9ac changes from 0 to 1. When the count reaches 1, a count pulse is generated and a signal is output to the counting counter 10 to increment the count by 1. In the AND gate 8c, the signal A is
As shown in the signal explanation below corresponding to the measuring section 2c in FIG. 4h, the signal changes from 0 to 1 at point (h ₃ ),
It immediately returns from 1 to 0, but since the signal B corresponding to the measurement unit 2c one line before the current scanning of the signal A is always 0, the output of the calculation result to the flip-flop circuit 9bc is always 0. is,
Therefore, flip-flop circuit 9bc does not output count pulses to counting counter 10.

The counting method for further scanning from the scanning position shown in FIG. 4h to FIG. 4i is the same as the counting method from FIG. 4e to FIG. 4f described above. In the AND gate 8a, the input signal is such that the signal from the measuring section 2a changes from 0 to 1, and the scanning signal B changes from 0 to 1 at a position slightly after the signal from the measuring section 2a in the scanning direction. However, since both the current scanning signal of the end light receiving element 5a and the signal of the end light receiving element 5a scanned one line before the currently scanning signal are 1, the output signal of the AND gate 8a is 1. Since the operation result as the input signal does not change from 1 to 0, the flip-flop circuit 9ba does not output a count pulse to the counting counter 10, and as in FIG. 4h, the counting counter 10 does nothing. Other measurement units 2b, 2c and flip-flop circuits 9aa, 9ab, 9ac, 9bb, 9bc, 9c, 9d
Although there are differences in the position where the signal changes from 0 to 1 and from 1 to 0, scanning is performed and counted in the same manner as the counting method explained in FIG.

In the situation shown in Figure 4 i, when the currently scanned signal A reaches point (i ₁ ), the measurement unit 2
The signal received from the light source 1 is transmitted to the AND gate 8a and the flip-flop circuit 9aa.
Then, as shown by the signal A and the signal B in the lower part of _FIG . Then, the input signal changes from 0 to 1 in the flip-flop circuit 9aa, and the flip-flop circuit 9aa generates a count pulse and adds 1 to the counting counter 10. At this time, the signal B also changes from 0 to 1 at a position slightly before the position in the scanning direction where the currently scanned signal A changes from 0 to 1, but the currently scanned signal of the end light receiving element 5a Since both the signals of the end light receiving element 5a scanned one line before the currently scanned signal are 1, the output signal of the AND gate 8a remains 1, and the output signal of the flip-flop circuit 9ba is the input signal. Since the calculation result does not change from 1 to 0, no count pulse is output to the counting counter 10, and the counting counter 10 does nothing. Furthermore,
The flip-flop circuit 9c generates a count pulse and outputs a signal to the counting counter 10 to subtract 1 because the signal currently scanned by the end light receiving element 5a, which is output at the same time as the storage section 6 stores it, is 1. Furthermore, in the measurement unit 2b, the signal obtained by receiving the light from the light source 1 at the point (i ₁ ) is passed through the AND gate 8.
b. Send to flip-flop circuit 9ab. Then, as shown by the scanning signal A of the measuring section 2b in the lower part of _FIG . A goes from 0 to 1. Then, in the flip-flop circuit 9ab, the input signal changes from 0 to 1.
Then, the flip-flop circuit 9ab generates a count pulse and adds 1 to the counting counter 10. As the scanning progresses further, the end light receiving element 5 of the measuring section 2b
The signal A currently being scanned is 1 until the light b is completely received. Similarly, the signal B one line before the currently scanned signal A from the storage unit 6 also remains 1 until the end light receiving element 5b finishes receiving light. Therefore, the AND gate 8b synchronizes and inputs the currently scanned signal A from the measuring section 2b and the signal B of the previous line stored in the storage section 6, and then performs an AND operation. Then, the calculation output is 1 from the time when light is received at point (i ₁ ) until the point (i ₂ ) when the end light receiving element 5b finishes receiving light, and the signal output from the AND gate 8b is 1 until the end of scanning. Therefore, the flip-flop circuit 9bb which receives the signal from the AND gate 8b does not generate a count pulse because the signal from the AND gate 8b does not change from 1 to 0, and the counting counter 10 does not count. On the other hand, since the signal currently received by the end light receiving element 5b, which is output at the same time as the storage section 6 stores it, is 1, the flip-flop circuit 9d generates a count pulse to the counting counter 10 and outputs a signal to the counting counter 10 to subtract 1. . Measuring part 2c
Then, at point (i ₂ ) light is received from light source 1 and the output signal becomes 1, at point (i ₃ ) no light is received and the output signal becomes 0, and at point (i ₂ ) the input signal of flip-flop circuit 9ac is changes from 0 to 1, so a count pulse is generated and 1 is added to the counting counter 10. In the AND gate 8c, as shown in the signal explanation corresponding to the measuring section 2c shown in the lower part of _FIG .
The signal B changes from 0 to 1 at the point (i ₃ ), the signal B changes from 1 to 0 slightly before the point (i 3 ) in the scanning direction, and the output from the AND gate 8c changes slightly before the point (i ₃ ) in the scanning direction. goes from 1 to 0, flip-flop circuit 9
bc inputs this signal, and since the input signal from the AND gate 8c changes from 1 to 0, it generates a count pulse to the counting counter 10 and subtracts 1 from the counting counter 10.

The period from FIG. 4i to FIG. 4j is the same as the counting method at the position shown in FIG. 4d described above.

As the scanning progresses further and in the state shown in FIG.
Count pulses are not output from c, 9ac, and 9bc to the counting counter 10. Measuring part 2b
Then, the light receiving element corresponding to the point (j ₁ ) receives the light from the light source 1, and the signal A currently being scanned at the point (j ₁ ) changes from 0 to 1 and then changes from 0 to 1 again. Then, the flip-flop circuit 9 inputs this signal.
At ab, a count pulse is generated and a signal is output to add 1 to the counting counter 10. The AND gate 8b inputs the signal A output from the measurement section 2b and the signal B corresponding to the signal A stored in the storage section 6 in synchronization, and performs an AND operation. Then, the signal from the storage unit 6 changes from 0 to 1 slightly before the point (j ₁ ) in the scanning direction, and changes from 1 to 0 slightly after the point (j ₁ ) in the scanning direction, and the signal from the AND gate 8b changes. The result is that when the signal A at point (j ₁ ) changes from 1 to 0, the flip-flop circuit 9bb generates a count pulse when this signal is input, and causes the counting counter 10 to subtract 1. Outputs a signal.

By counting as explained above, the measurement unit 2
The result of measuring the hole 12 by the measurement units a to 2c is "1".

In the above description, there are three measuring units, and the middle part is only the measuring part 2b, but even if the number of measuring parts in the middle part is increased to a plurality of measuring parts, accurate counting is possible in the same way.

Each of the measurement units 2a to 2 is measured using the method described above.
The counting of e and the counting of the end light receiving elements 5a to 5d in the overlapped portion will be briefly explained using the case as shown in FIG. 5 as an example. Flip-flop circuit 9 related to measurement section 2a
The counting counters aa, 9ba, and 9c count "0" at each of the holes 12a to 12e when the object to be measured 4 is conveyed in the direction of the arrow in the figure and has passed through the measuring section 2a, and similarly, the counting counter counts "0" at the holes 12a to 12e. 2b, the counting counter counts each of the holes 12a to 12c by "1" and a total of "3".
Since "-1" is counted in d, the total is "2"
The counting counter counts "-1" at the hole 12f and counts "2" at the hole 12d using the flip-flop circuits 9ac, 9bc, and 9e associated with the measuring section 2c.
, and the hole 12e counts "1", so the total is counted "2", and the flip-flop circuits 9ad, 9bd, 9f associated with the measuring section 2d count "2" in the counting counter, and the hole 12f counts "2". 12h, the total count is 2, and the counting counter uses the flip-flop circuits 9ae and 9be associated with the measuring section 2e to count the holes 12f, 12g, 12.
Each i is counted by "1" and "3" is counted. Therefore, when the light receiving section 2 reaches point B, the count display section 11 displays "9", the number of holes through which the holes 12 on the object 4 have passed through the light receiving section 2.

As described above, when the object to be measured 4 has been conveyed between the light source 1 and the light receiving section 2, the count display section 11
The total number of holes 12a to 12i on the object to be measured 4 is displayed, and the counting is completed.

(g) Effects According to the method described above, even if the width of the object to be measured is so large that it is impossible to count it with one measuring section, it becomes possible to measure it by providing a plurality of measuring sections as described above. Furthermore, it is not necessary to store all the signals that scan the object to be measured, and furthermore, there is no need for complicated operations such as labeling, so that the measurement time can be shortened.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are parts diagrams of the same, and FIGS.
FIG. 5 is an explanatory diagram of the counting method. DESCRIPTION OF SYMBOLS 1...Light source, 2...Light receiving part, 2a-2e...Measurement part, 3...Transportation device, 4...Measurement object, 5...
Light receiving element, 5a to 5d... End light receiving element, 6...
Memory section, 7...Counting section, 8...And gate, 9
aa~9ae...flip-flop circuit, 9be~9
be...Flip-flop circuit, 9c to 9e...
Flip-flop circuit, 10... Counter, 11... Display section, 12, 12a to 12i...
Hole.

Claims (1)

[Claims] 1. When the object to be measured passes, a measurement unit that can identify the presence or absence of the object to be measured, measure it, digitize it, and transmit it, and scan sequentially in the direction of movement and the cross direction of the object to be measured, is installed adjacently. A plurality of light receiving sections are provided such that the end light receiving elements of the measuring section overlap each other in a direction crossing the traveling direction of the object to be measured, and a storage section that sequentially stores digitized signals measured by each measuring section in the scanning direction. , a counter that inputs the digitized signal measured by the end light receiving element, and also inputs the scanning signal of each measuring section and the stored signal before scanning, compares and counts, and displays the counting result. The counter subtracts the input digitized signal from the end light-receiving element when the measuring object is measured, and subtracts the input digitized signal from the end light receiving element and displays the input signal for each scan and the stored signal. A counter characterized in that when the signal before the scanning becomes a signal that does not measure the measurement target from the signal that measured the measurement target, it is subtracted, and when the signal for each scan measures the measurement target, it is added.