JPS5897785A - Pattern reader - Google Patents

Abstract

PURPOSE:To simplify the handling and the constitution with a compact design for a pattern reader, by reading various types of graphic data by shifting freely a sensor device on the setting device that set a pattern. CONSTITUTION:A pattern setting device 1 has rails 2 which serve as a pair of sensor shift guiding mechanism at both edge parts of the device 1 and transparent setting plate 3 which contains a scale plate 8 having reflecting plates 5 for detection of position and non-reflecting plates 4 arranged alternately on the surface with a certain interval. A sensor device 11 slides freely along the rails 2. A sensor device 2 contains a 1-dimensional photodetecting element array 18 and an optical device 17. The pattern information of a subject pattern to be inspected is detected out of the output signal of the array 18. Then the graphic information of an optical interval is extracted based on the position information obtained from the plate 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a figure reading device for numerically reading information contained in figures such as an electrocardiogram or a one-wave detection graph.

Conventionally, a figure information reading device moves a sensor slowly over the figure to be inspected at an accurate speed using a dense drive mechanism, and processes the output signal of the sensor using a large computer or the like. Because it was constructed as a relatively large-scale device that required information to be obtained as numerical values, it had to be extremely expensive, and the operation was complicated and it was difficult to handle it easily, so it was not used in medical or manufacturing settings. There were drawbacks such as the difficulty of

In addition, since the figures to be inspected are provided from various data recording devices, there are differences in the recording paper or the shade of the figure writing lines for each data, and the level of the reading device must be adjusted to match each data each time it is read. This has the disadvantage that it takes a long time to operate, and sometimes cannot be used over a wide range of areas.

An object of the present invention is to provide a graphic reading device that has a simple configuration and is extremely easy to handle. A figure setting device for setting a figure to be inspected on the lower surface of a transparent setting plate or hollow frame having a scale plate formed by alternately arranging reflectors and a hollow frame, and having a one-dimensional light detection element play; , Part 1
A sensor device having an optical device that connects a figure to be inspected set in the figure setting device on a dimensional light detection tag array, and capable of freely sliding along a sensor movement guide mechanism of the figure setting device. and a control circuit configured to detect the graphical information of the target figure to be inspected from the output signal of the one-dimensional photodetecting element play of the sensor device, store it in the memory, and transfer the graphical information to the outside. When the scanning position of the one-dimensional photodetecting element array due to the movement of the sensor device changes from the reflective plate of the scale plate of the figure setting device to the non-reflective plate, and from the non-reflective plate to the reflective plate. The figure reading device is designed to extract only the figure information of the figure.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

The figure setting device 1 is a transparent cell having a pair of rails, V2t-, on both edges as a sensor movement guide mechanism.

A scale plate 8 for position detection in which a non-reflective plate 49, a reflective plate 51, a reflective plate 6 and a non-reflective plate 7 are arranged alternately at regular intervals on one edge of the surface of the transparent set plate 30, and the right end. A non-reflective plate 9 for instructing termination is arranged in each section, and a correction area 10 is provided at the left end approximately in the center, and the sensor device 1
1 has a loaf 14 and a window 15 on the bottom surface of the main body case 12 for smoothly moving the main body along the rail 2, and a funda 16 (the funda can also be placed outside) and a lens 17 in the middle part. Further above, a one-dimensional photodetecting element array 18 (hereinafter referred to as an image sensor) is arranged, and as shown in FIG.
Figure 1 to be inspected placed on the bottom surface of the transparent set plate 3 of 1
9 (hereinafter referred to as figure data) is illuminated by a hook 16, and the reflected light passes through the honey 15 and is focused by a lens 17, and the figure data 19 and the non-reflection plate 49 and the reflection plate 5 are placed on the image sensor 18. ．． The scale plate 8 is installed, and the signal from the image sensor 18 passes through the waveform shaping circuit 20 and becomes the output signal vo.
At the same time, a clock pulse CO and a start pulse SP are output from the image sensor 18.

Next, FIG. 4 is a block diagram showing the overall configuration of the control circuit, in which the output signal 0 of the image sensor 18 is sent to the comparator 21. The clock pulse CO is input to the minimum value storage circuit 22 and maximum value storage circuit 23, and the clock pulse CO is input to the sample gate generation circuit 24. Data collection end detection circuit 25. The start pulse SP is input to the abde counter 26 via ANDl, and the start pulse SP is input to the 8-bit counter 27 . In addition to being manually input to the minimum value storage circuit 22 and maximum value storage circuit 25, the input signal of the reset switch 28 is outputted from the one shift circuit 29, and the set signal of the flip FF 0 flip FF 1 and the 8-bit counter 2 are input.
7. F'IF''Oi 930° is used as a reset signal for the minimum value storage circuit 22 and the maximum value storage circuit 23, respectively, and the output of the sample gate generation circuit 24 is used as the reset signal for the minimum value storage circuit 22 and the maximum value storage circuit 23, respectively.
2 and the maximum value storage circuit 25, the output of the minimum value storage circuit 22 is stored in the register 61, the output of the maximum value storage circuit 23 is stored in the register 32, and each register 51.3
2 signals are added in the adder 36 and then subjected to D/A conversion! 34
The voltage level is trapped by FF2. Scale detection circuit 36. 57. In addition to being input to the data collection end detection circuit 25 and the FIFO memory 30 as a data input, the Q output of the flip-flop FF'2 is passed through an analog gate (AND1) and used as a clear signal for the up counter 26. The output (B signal) is input to the scale detection circuit 36, and the scale detection circuit 3
The output of the retrigger pull-on-shit circuit 57 as well as the output of the one-shot circuit 38. AND GATE AN
F'IFO memory 30 via D2 and OR gate OR
In addition to the write signal WR, the flip-flop FF1 of the reset circuit counts clock pulses CO after the reset switch 28 is operated.
After 56 counts, each circuit outputs a reset signal.

Next, the operation of each circuit will be explained in detail. First, each output VO, Co of the image sensor 18.

The waveform of SP is shown in the chart in FIG. 5. In this embodiment, the start pulse SP is generated 847 times per second, and the image sensor 18 starts scanning in response to this pulse.
An output signal vO is output.

output as a pulse sequence. The number of pulses is the same as the number of elements of the image sensor, which is 512 in this example. At the same time, a pulse train of a constant voltage value having a period matching the pulse interval of the pulse train in the output signal 110K is output as the clock pulse CO.

For example, in the scanning of the figure 19 shown in FIG. 6, the waveform of the output signal vo is the image sensor element numbers 1 to 4, and the non-reflection plate 4.
5-8 reflector plate 5.9-11 scale plate 8.12-20
1 and 206 to 512 output the white part of the graphic data, and 202 to 205 output the line part 19 of the graphic data, and the signal vO is shaped into a substantially parallel waveform by the comparator 21. Only the portion exceeding the threshold voltage V is made into a pulse waveform, which is further outputted as a large signal via the retrigger pull-out circuit 55.

Next, the sample gate generation circuit 24: I! As shown in the block diagram of FIG. 6, the up counter 39 is reset by the start pulse SPK to rOJ, and then counted up by the clock pulse CO, so the count corresponds to the element number, and the 9-bit switch 40 has a sample gate set in advance. Set the element number you want to start outputting a signal, and also set the element number you want to end the signal in switch 41. By counting up, the count number &, G, and the switch set number s, d are set to the digital comparator. 42, and both match a=b
, c=d, the digital comparator 42 outputs and the flip-flop FF'30 is set and reset, and therefore the output of the flip-flop FF'5 is only between the element numbers corresponding to the values of the switches 40 and 41. This becomes the sample gate signal C, which becomes the drive signal for the minimum value storage circuit 22 and maximum value storage circuit 23.

Next, as shown in the block diagram of FIG. 7, the minimum value storage circuit 22 sets the down counter 46 to 255 by operating the reset switch 28, and sets the D/A down counter 46 to 255.
Conversion! The output voltage VM of 44 is set to 2.5v, for example.

Here, within one scan of the image sensor 18, the voltage of the pulse proportional to the amount of light received by each element in the output signal vO of the image sensor 18 is the output voltage V of the D/A converter 44.
When it is smaller than M, there is no output from the comparator 45 and the voltage remains at O volts, but when VO)VM, the comparator 45 outputs a pulse with a constant voltage value. Since the output of the comparator 45 is input to the reset trigger circuit 46, its output is VO, H1gh, u, VO> VMer), L
It becomes OW level. Retrigger wopuru oneshi adventure circuit 4
Since the output of 6 is input to the sample gate signal C and 4 to the AND gate AND3, when the sample gate signal is generated, the output of the retrigger pull-down circuit 46 is high.
When the 1gh level (vo≦VM), the AND gate AN
A pulse is output from D3, causing the down counter 43 to count down, and if this is repeated, the state of vO≦VM will eventually disappear when the sample gate signal is generated, and the pulse will no longer be output from the AND gate AND3, so the counter 46 v in the sample gate signal within
.

The minimum value of is stored and this signal is input to register 31.

Further, as shown in the block diagram of FIG. 8, the maximum value storage circuit 23 operates the reset switch 28 to set the up counter 47 to rOJK-h and performs D/A conversion M4.
When the output voltage of the image sensor 18 becomes larger than the output voltage VM when the sample gate signal C is generated within one scan of the image sensor 18. , the comparator 49 outputs the output to the up counter 4 via the AND gate AND4.
If you make 7 an upcounter and repeat this, you will eventually get VO.
) The state of VM disappears, and in this state, the maximum value of vO in the sample gate signal is stored in the counter 47, and this signal is inputted to the dimeta 52'.

Then, the average value of the minimum value and the maximum value is added, and the D/A converter 64 automatically mutes the voltage level and the threshold V hold level of the comparator 21. The reading level can be automatically corrected according to the reflection intensity.

Next, as shown in the block diagram of FIG. 9, the 1 scale detection circuit 66 sets the element number of the image sensor corresponding to the scale plate position in advance in the 9-bit switch 50, and selects the image sensor 18 for each scanning unit. The output signal ■K is set so that a pulse is output when 0 is at the position of the scale plate, and it is used as the clock input of the flip-flop F'F'4.
The flip prop FF4 is set or reset by the voltage of the large signal when the output signal of the image sensor is at the scale plate position. When the large signal is at H level, that is, scanning the reflection plate 6, the flip-flop FF4 is set, and when the A signal is at the L level, that is, scanning the non-reflection plate 7, the flip-flop FF4 is reset. When moving to the next scanning unit, the contents of the flip-flop FF'4 are transferred to the flip-flop F:P5 by the start pulse SP, and the scanning information of the scale plate 8 in the next scanning unit is entered into the flip-flop PF4, i.e. Each time the scanning unit changes, the flip-flop FF4 is set, FF5 is reset, or PF'4 is reset, and F''F5 is set, and at this time, the scanning position of the image sensor 18 is reflected from the reflection plate 6 of the scale plate 8. At the moment of transition to the plate 7 or from the non-reflection plate 7 to the reflection plate 6, this state is detected by the exclusive #circumference circuit EX-OR, and the F'IFO memory 30 is output as the output of the scale plate detection circuit. Input to write signal WR.

Therefore, the graphic information is accurately detected at the scanning position of the image sensor 18 at an interval corresponding to the interval between the total reflection plate 6 and the non-reflection plate 7, regardless of the moving speed of the image sensor 18. The sensor device 11 can be stored in the memory 30, and the sensor device 11 can be moved at any speed on the figure setting device 1, making the operability extremely simple.

Next, as shown in the block diagram of FIG. 10, the data collection end detection circuit 25 resets the seven flip-flop FF6 by operating the reset switch 28, and then sets the flip-flop FF7 at the rising edge of the start pulse SP. The first clock pulse C that follows this
The reset is completed at the rising edge of o, and the flip-flop FF7
Since the Q output of is connected to the setting input of the flip-flop F'F8, the flip-flop FF8 is set for each scanning unit of the image sensor 18, and a large signal is connected to the input of the flip-flop FF'8. Therefore, the A signal is at H level in one scanning unit, that is, the output signal v
When O is greater than the light reflection intensity wI level, the 7-ref defrot FF8 is reset, and the flip-flop F
When the Q output of F8 is connected to the input of flip-flop FF6, the flip-flop FF9 is set at the falling edge of the start pulse SP, and the next clock pulse CO
Since the Q output of the flip-flop FF8 is set to the flip-flop FF'6, the output signal vO is lower than the light reflection intensity adjustment level even once within one scan of the image sensor 18. The flip-frog F'F'6 is reset when a high value exists, and is set at other times, and the flip-frog is activated only when the image sensor 18 is scanning over the non-reflective plate for termination indication on the graphic image sensor 1. A Q output of F'F'6 is generated and can be known as data collection end detection fufugu E.

Next, the operating procedure for collecting graphic data using the graphic reading device of this embodiment will be explained.

First, among the figure data to be inspected, set it in the correction area 10 of the figure setting device 1 so that one loop of the thinnest figure and the plain part are included, and turn on the reset switch 28. Then, the image sensor 18 measures the light reflection intensity of the line part and the plain part of the figure, stores them in registers 61 and 62, respectively, and adds both values to the adder 36.
automatically sets the photodetection level on average, and at the same time resets each flip-flop and erases old data in the FIFO memory.

Next, when the sheet of figure data is set under the transparent setting plate 6 where the part to be measured is, and the sensor device 11 is manually slid along the rail A/2 of the guide mechanism, the figure information is automatically read out. 1cFIF○ Stored in memory. At this time, the speed of the slide can be set arbitrarily, and when the slide is stopped, the accumulation of information is also stopped, and this accumulated information corresponds to the light detection level set by the output signal ■○ in one scanning unit of the image sensor 18. This is information about the image sensor when moving up and down.

In addition, since the output pulse of the scale detection circuit 36 is connected to the write signal WR of the F'IF'0 memory 30, the counter value immediately after the scale is detected is accumulated, and this value is always a constant value. Accumulated information can be discriminated for each scanning unit, and furthermore, a non-reflective plate 4 and a reflective plate 5 are arranged on the figure setting device 1 in parallel with the Ray/L/2 as a guide mechanism. Therefore, the image sensor 18 always scans these non-reflection plate 4 and reflection plate 5 first within one scanning unit.
As a result, the counter 26 is reset, and the element number stored in the FIFO memory 50 is a value corresponding to the distance 4 from the boundary between the non-reflection plate 4 and the reflection plate 5. Become.

Also, the 5TATUS signal of the F'IF'O memory 60 is monitored, and when the signal is at H level, the READ signal is input to sequentially transfer the data in the F'IF'O memory 60 to the external #I.
When the 5TATUS signal is inverted to L level, it can be known that all data has been transferred.

Also, when it is necessary to make the graphic information extraction direction distance in the sensor sliding direction smaller than the distance between the reflective plate 6 and the non-reflective plate 7 of the scale plate, Change the scale plate information (information on whether the scanning position is on the reflective plate 6 or the non-reflective plate 7) and graphic information for all scans of the image sensor 18 to the PIF'O as shown in the figure.
After writing the information into the memory 30 and transmitting the information to an external device, a computer or the like is used to run a program and analyze the scale plate information, thereby correcting non-uniformity in the moving speed of the image sensor 18 and adjusting the scale. 1 reflector plate with plate 6 layers 1
Assuming that the speed of moving the two non-reflective plates 7 is approximately constant, graphic information with an interval 4 smaller than the interval between the reflective plate 6 and the non-reflective plate 7 of the scale plate is extracted from among the graphic information already extracted. Extract - A transparent set plate or a transparent set plate covered with the lower surface of the hollow frame that has a movement guide mechanism and a scale plate consisting of a reflective plate and a non-reflective plate for position detection arranged alternately at regular intervals on the surface. A figure setting device configured to set a figure to be inspected, a one-dimensional light detection element play, and an optical system for forming an image of the figure to be inspected set in the figure setting device on the one-dimensional light detection element play. a sensor device having a device and configured to be freely slidable and twisted along a sensor movement guide mechanism of the graphic center device;
a control circuit configured to detect graphic information of the target figure to be inspected from the output signal of the one-dimensional photodetecting element array of the sensor device, store it in a memory, and transfer the graphic information to the outside; Graphic information when the scanning position of the one-dimensional photodetecting element array due to movement of the sensor device transitions from the reflective plate to the non-reflective plate or from the non-reflective plate to the reflective plate of the scale plate of the graphic setting device; Alternatively, there is an installation shown in FIG. 5 in which graphic information at an arbitrary interval smaller than the interval between the reflective plate and the non-reflective plate is extracted.

Therefore, the present invention can provide a small-sized graphic reading device with an extremely simple configuration, and in particular, the operation surface is
Since the sensor device can be read by simply moving the sensor device arbitrarily over the setting device in which the graphics are set, handling is extremely simple and the device can be widely used as a reading device for various graphic data.

In addition, a correction area is provided on the transparent setting plate of the figure setting device, and a correction area is provided in the control circuit according to the maximum and minimum values of the light reflection intensity of the object to be inspected. A circuit for controlling the detection level of graphical information is provided, and it is possible to accurately measure individual objects to be inspected with extremely simple operations, and the operating time can be significantly shortened.

Furthermore, since the figure to be inspected only needs to be placed under the transparent setting plate of the figure setting device, it is easy to measure even variously deformed data sheets, and the sensor device can simply be moved manually on the rail. This has the effect of not requiring any special equipment such as a drive mechanism for moving the sensor.

Furthermore, even if a driving device is added, it is not necessary to slide at a strictly constant speed, and non-uniformity in speed can be compensated for by the scale detection circuit mentioned earlier, so a very inexpensive driving device can be used. .

[Brief explanation of the drawing]

The sections show one embodiment of the present invention; FIG. 1 is a perspective view thereof, FIG. 2 is a front view of the figure setting device, FIG. 6 is a schematic diagram of the entire sensor device, and FIG. 4 is a block diagram showing the overall configuration of the control circuit, FIG. 5 is a time chart thereof, FIGS. 6 to 10 are block diagrams showing each part of the control circuit, and FIGS. FIG. 2 is a block diagram of a control circuit according to an embodiment of the present invention. 1... Figure setting device 2... Rail 6... Transparent setting plate 4... Non-reflective plate 5... Reflective plate
8... Scale plate 10... Area for correction
11...sensor device 17...lens
18...Image sensor-19...Graphic data
22...Minimum value storage circuit 23...Maximum value storage circuit 24...Sample gate generation circuit 25...Data collection end detection circuit 601.・P I F' O memory 31.32...
Register 66... Adder 66... Scale detection circuit Application Person Suzuken Co., Ltd.

Claims (1)

[Claims] (x) It has a set of sensor movement guide horizontal grooves in the Km section, and has a scale plate on the surface of which reflective plates and non-reflective plates for position detection are arranged alternately at regular intervals. It has a figure setting instrumentation unit in which the figure to be inspected is set on a transparent set plate or the lower part of the hollow frame, and a one-dimensional photodetecting element play. an optical device for forming an image of the figure to be inspected set in the figure setting device on the one-dimensional detection element array;
The sensor device is designed to be able to slide freely along the sensor movement guide mechanism of the shape setting device, and the graphic information of the target figure to be inspected is detected from the output signal of the one-dimensional photodetecting element array of the sensor device, and is stored in the memory. The scanning position of the one-dimensional photodetecting element array as the sensor device moves is controlled by the reflecting plate of the scale plate of the pattern setting device. A figure reading device characterized in that figure information is extracted when there is a transition from a non-reflective plate to a non-reflective plate or from a non-reflective plate to a reflective plate, or figure information at an arbitrary interval smaller than the interval between a reflective plate and a non-reflective plate. Device. (i) If a correction area is provided on the transparent setting plate of the figure setting device or within the middle color frame, the light reflection of the figure to be inspected set in the correction area will be reflected in the control circuit. Claims characterized in that a circuit is provided to control the detection level of graphic information according to the maximum value and minimum value of intensity, so that correction can be made according to the light reflection intensity of each individual figure to be inspected. The figure reading device according to item 1.