SU1084838A1 - Device for reading information - Google Patents

Abstract

A DEVICE FOR READING INFORMATION containing a video amplifier connected to image signal sensors, whose inputs are connected to a sweep generator, with a video control unit, with a threshold element, with a synchronous generator connected to a sweep generator, to a shift register and to a delay element, with a driver pulses connected to the delay element and to the first counter, another input of which is connected to the sweep generator, connected to the delay element, and the output of the first counter is connected to the first unit And elements, the first element And, -inputs of which are connected to the shift register, and the output is connected to the video amplifier and to one input of the first trigger, the second element And whose inputs are connected to the threshold element and to the first block of elements And, and the output is connected to one input the first element OR, the control unit connected to the first trigger, to the second block of AND elements and to one input of the subtraction unit, the other input of which is connected to the second counter, and the output connected to the first memory block, the second memory block, one input of which Connected to the control unit connected to the first block of elements And to one input buto-. OR, and the third element, AND, one input of which is connected to the second trigger, and the output connected to one input of the second counter, characterized in that, in order to improve the accuracy of the device, the fourth element AND, whose inputs are connected to the synchro-generator and with one output of the first trigger S, the other input of which is connected (L to the output of the second element OR, the input of which is connected to the second block of AND elements connected to the memory blocks, the third counter connected to the output of the fourth element AND, the fifth element I, input Which are connected to the output of the first element I and the first trigger, and the output under 100 is connected to one input of the second trigger 4. The other input of which is connected 00 to the output of the first element OR, a mode switch connected to the scanner, and to the third counter, the output of which is connected to another input of the second block of elements And, and the sixth element And, whose inputs are connected to the outputs of the first trigger and clock generator, and the output connected to the other inputs of the first element OR, second and third of counters.

Description

The invention relates to automation and computing, in particular to carrying information reading devices, and can be used in the automatic processing of various pictures and graphs.

A device for reading information is known comprising an image sensor whose output is connected to the first input of the video amplifier, the first output of the video amplifier is connected to the input of the threshold element, the second output is connected to the input of the video monitoring device, and the second input to the first output of the sync generator and the first input of the shift register, the third input - to the first input of the delay element and to the second output of the synchronizing generator, the third output of the synchronizing generator is connected to the input of the sweep generator, first, second, third, quarter, fifth and above the outputs of which are connected to the corresponding inputs of the image sensor; the fourth output of the synchronous generator is connected to the second and third inputs of the shift register, the first and second outputs of which are connected to the corresponding inputs of the first And element, the output of which is connected to the fourth input of the video amplifier, five of which are connected to the output of the imager pulses, the pulse driver input is connected to the output of the delay element, the control unit whose first output is connected to the first input of the first trigger, the first even the outputs of which are connected to the corresponding inputs of the first block of matches, the output of the first block of matches is connected to the first input of the second element AND, the first element OR the output of which is connected to the first input of the second trigger, the output of which is connected to the first input of the third element AND whose output is connected to the first input read out, the output of the reader is connected to the first input of the first memory block, the second memory block, the third counter, the fourth and fifth elements AND, the second element OR lj. The disadvantage of this device is its low accuracy.

Closest to the invention is a device for reading information containing an image sensor sensor connected to

sweep generator connected to the sync generator, with a video amplifier connected to the video control unit, to the threshold element, to the pulse shaper, to the first

the counter and to the first element And, connected to the shift register, the delay element connected to the synchronous generator, the first and second blocks

matches, connected to the first counter and to the control unit, respectively, the second element And connected to the threshold element, with the first block of elements And with one

the input of the first element OR, the triggers, the inputs of one of which are connected to the control unit and the output of the first element AND, and the output of the other is connected to the third element AND connected to the second counter and to the synchronous generator, the subtracting unit connected to the control unit and to the second the counter, and the output is connected to the first memory block, and the second block

a memory connected to a control unit connected to the second element OR 2. .

A disadvantage of the known device is not high enough.

accuracy.

The purpose of the invention is to improve the accuracy of the device.

The goal is achieved by the fact that the device containing

a video amplifier connected to image signal sensors whose inputs are connected to a sweep generator, with a video control unit, with a threshold element, with a synchronous generator connected to a sweep generator, to a shift register and to a delay element, with a pulse shaper connected to a delay element and to the first counter, the other input of which is connected to a sweep generator connected to the delay element, and the output of the first counter is connected to the first block, the And elements, the first And element,

the inputs of which are connected to the shift register, and the output is connected to the video amplifier and to one input of the first trigger, the second element And, the inputs of which are connected to the threshold

element and with the first block of AND elements, and the output is connected to one input of the first element OR, the control unit connected to the first trigger, to the second block of AND elements and to one input of the subtraction unit, the other input of which is Connected to the second counter, and the output is connected to the first memory block, the second memory block, one input of which is connected to the control unit connected to the first block of AND elements and one input of the second OR element, and the third AND element, one input of which is connected to the second trigger, and the output connected to one log in the second counter, the fourth element I, whose inputs are connected to the synchronous generator and one output of the first trigger, whose other input is connected to the output of the second OR element, whose input is connected to the second block of elements, and the third counter, are entered, connected to the output of the fourth element And, the fifth element And, the inputs of which are connected to the output of the first element And the first trigger, and the output connected to one input of the second trigger, the other input of which is connected to the output of the first element OR, a mode mutator connected to the sweep generator to the image signal sensor and to the third counter, the output of which is connected to another input of the second block of I elements, and the sixth element And whose inputs are connected to the outputs of the first trigger and sync generator, and the output connected to other inputs of the first element OR, the second and third counters. FIG. 1 is a block diagram of the device; FIG. 2 иЗ - time diagrams. The device includes an image signal sensor 1, a video amplifier 2 (MAS), a threshold element 3, a video control unit 4, a synchronous generator 5, a shift register 6, a pulse generator 7, a delay element 8, a sweep generator 9, the first 10, the second 1 and the third 12 counters , the first 13, the second 14, the third 15, the fourth 16, the fifth 17 and the sixth 18 And elements, the switch 19 modes, the control unit 20, containing the control unit 21 and the single pulse generator 22, the first 23 and second 24 blocks of And elements, the first 25 and second 26 memory blocks, first 27 and second 28 elements 1 84 you or, block 29 subtraction, first 30 and second 31 triggers. The device works as follows. When the power is turned on at the initial time, the generator 22 generates a pulse (Fig. 20 |), coming through the OR element 28 to the input of the trigger 30, which produces a signal (Fig. 2a), locking the elements AND 16 and 17 and the signal (Fig. 26) And 18 unlocking element. In synchronization generator 5, a synchronization signal (FIG. 3A), an suppressive signal (FIG. 3B), a vertical extinguishing pulse (FIG. 25) and special pulses are designed to control the sweep generator 9, which are fed to generator input 9. The sweep generator 9 generates a pulse sequence for the purpose of controlling the operation of the accumulation section, the memory section and the output register of the image sensor 1. The control signals of the memory section and the output register go directly to the inputs of the sensor 1. Simultaneously, the control signal of one of the phases of the output register goes to the counting input of the counter 10. The pulse control sequences of the accumulation section are fed to the inputs of the accumulation mode switch 19. At the same time, a code from the output of counter 12, corresponding to one of the photogenerated charge accumulation modes, is fed to another input of the switch 19. Under the action of the code from the output of the counter 12, the pulses coming from the output of the sweep generator 9 are transformed in such a way that the accumulation of photogenerated charges occurs, for example, under the first phase of the device with charge coupling 1, the output signal of the image sensor 1 is fed to the first input MAS 2. The damping signal of the receiver (Fig. 3B) is fed to the second input of the video amplifier 2 and to the delay element 8. A signal from the output of the delay element 8 starts the pulse shaper 7, which produces pulses (Fig. 3b), the duration of which is determined by the required vertical width of the measuring mark on the screen of unit 4. The counter 10 at zero time tilts the pulse. At the same time, a pulse (Fig. 3S) is fed to the input of the WCD 2. The synchronization signal (Fig. 3q) is fed to the first input of the shift register 2, to the third input of the video amplifier 2 and to the input of the element 15 I. A frame damping pulse. (Fig. 2), the shift register 6 is reset and through the AND 18 element the initialization of the counters 11 and 12 and the OR 27 of the trigger 31 is set. At the next moment of time the impulse (FIG. 2S) of the holding register 6 ends in zero. nii. The trigger of register 6 is sequentially switched by pulses (Fig. 3a). At time tg from the output of the penultimate bit of register 6, a pulse is applied to the second input of the element 13 at the first input of which a signal is received from the inverse output of the last bit of the register 6. From the output of the element 13 a pulse (Fig. 2b) is intended to form a horizontal the measuring mark is fed to the fourth input of the MAS 2, to the synchronization input of the trigger 30, and to the input of the And element 17. In the video amplifier, the signal from the output of the image sensor and pulses is mixed (Fig. 2J), Fig. Over, B, and b). From the second output of the MES 2, an image signal is input to the input of unit 4 with measurement tick pulses mixed in and damped and synchronizing pulses. The image under study, for example, a phonogram of the magnetic tape or an interferogram of the optical surface, is projected onto the sensor 1 in this way so that the direction of the strips is perpendicular to the vertical measuring mark on the screen of unit 4 and parallel to the horizontal measuring mark. The code corresponding to the number of accumulation modes used and the code corresponding to the horizontal coordinate of the readable element of the image element are fed from block 20 to the block 24. At the beginning of each line, the counter 10 is impulsed (Fig. 3 &). Then, the counter 10 pulses of the horizontal scan of the sensor 1 (control pulses of the output register) are recorded. By the time t ,, the counter 10 records the number of pulses corresponding to the horizontal coordinate, and the output of block 23 produces a pulse (Fig. 32) arriving at the input of element And 14. With the start of a signal, the measurements, for example, after switching on by the operator corresponding control button at time t. the first input of the trigger 30 receives a pulse (Fig. 22). At time tc, a pulse arrives at the third input of trigger 30 (Fig. 2b). The trigger 30 overturns. From the first output of the trigger 30 to the input of the elements And 16 and 17, a trigger pulse is applied (Fig. 2), and from the second output of the trigger 30 to the first input of the element And 18 - a locking pulse (Fig. 2e). The impulse (Fig. 2b) passes through the element AND 17 and the second input of the trigger 31. The trigger 31 overturns. From the trigger output 31, a signal (FIG. 2k) is turned on AND 15 unlocking element. Linear synchronizing pulses (FIG. 3A) Trotrohod through element 15 on the counting input of counter 11. From the first output of MAS 2, the amplified image signal is fed to the input of threshold element 3 When an image of the object under study appears in the image signal, the threshold element 3 is triggered. The output pulse of element 3 triggers a trigger pulse (Fig. 3d) to the input of element AND 14. Through element 14 and element OR 27 to input of trigger 31 enters at time t impulse (fig. Ze), tim tipped trigger pulse 31. The output trigger signal 31 is fed (fig, 2i), the locking member and T5. At the next time instant, the code at the output of the counter 12 is affected by a pulse (Fig. 25), the counter 12, which goes to the counting input through the AND element 16, changes the code from the counter 12 to the accumulation mode switch 19. In switch 19, the accumulation of photogenerated by the image sensor charges is changed. In this case, the signals coming from the sweep generator 9 are switched, for example, so long that the accumulation of photogenerated charges occurs simultaneously under the first and second phases of the image sensor 1, i.e. The center of accumulation of photogenerated charges is shifted to 1/6 of the photosensitive element of the image sensor. At time tg, the trigger 31 is tilted under the influence of a pulse (Fig 2)). A trigger (Fig. 2), an unlocking element I 15 is output from the trigger 31 output. The horizontal sync pulses (Fig. 3a) pass an AND 15 element through to the counting input of the counter 11. At the same time, the counter 10 records the number of pulses from the generator output 9 scan corresponding to the horizontal coordinate code. At the output of block 23, a pulse is produced (Fig. 3z), which enters the input of element And 14. When an image in the image point of interest is detected in the image signal, threshold element 3 is triggered. From the output of element 3, the triggering pulse enters the input of element And 14. Fig. Zb) passes at time t through the element And 14 and the element OR 27 at the input of the trigger ST. Trigger 31 overturns. The output of the trigger 31 serves as a signal (Fig. 2), the locking element AND 15. With the arrival of the next frame extinguishing pulse (Fig. 2), the code at the output of counter 12 changes. The changed code from the output of counter 12 goes to switch 19. In switch 19, the accumulation of photogenerated charges by sensor 1 is changed. In this case, the signals coming from the sweep generator are switched, for example, in such a way that the accumulation of photogenerated charges occurs under the second phase of the image sensor 1, i.e. The center of accumulation of photogenerated charges is still shifted to 1/6 of the photosensitive element of the image sensor. The reading continues in the same way until counter 12 records the number of personnel extinguishing pulses (Fig. 2) corresponding to the number of read cycles code received from block 20. The number of read cycles is assumed to be equal to the selected number of photogenerated charge accumulation modes. The accumulation, for example, takes place first under the first phase, then simultaneously under the first and second, under the second, under the second and third, under the third, under the third and first. In this case, with each change in the accumulation mode, the center of photogenerated charges accumulates by 1/6 of the photosensitive element. At the moment of time to, the code at the output of the counter 12 is equal to the code coming from the output of block 20. In block 24, a pulse is generated (Fig. 2L). The pulse (Fig. 2L) through the OR 28 element enters the trigger input 30. The trigger 30 is overturned, AND 16 and 17 are locked and unlocked AND 18. At the same time, the pulse passes to the inputs of blocks 25 and 26, allowing the recording from horizontal coordinate code block 20 , and from the output of block 29 - the code of the vertical coordinate. The vertical coordinate code is obtained by subtracting in block 29 from the code coming from the output of counter 11 of a given number of accumulation cycles. Thus, the proposed device provides the reading of information about the coordinate of the object under study, taking into account the spatial location of all possible accumulation centers of photogenerated charges. At the same time, on one element of the CCD matrix, the formation of several accumulation centers is provided, the spatial location of which is determined by the distribution of potentials between the phases of the photosensitive elements, i.e. the invention provides more accurate information. The introduction of new assemblies and units, as well as new constructive links, made it possible to significantly improve the accuracy of the device.

Fig, 1

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Claims (1)

DEVICE FOR READING INFORMATION, containing a video amplifier connected to image signal sensors, the inputs of which are connected to a sweep generator, with a video control unit, with a threshold element, with a clock generator connected to a sweep generator, to a shift register and to a delay element, with a shaper pulses connected to the delay element and to the first counter, the other input of which is connected to the sweep generator. connected to the delay element, and the output of the first counter is connected to the first block of the element And, the first element And, the inputs of which are connected to the shift register, and the output is connected to the video amplifier and to one input of the first trigger, the second element And, the inputs of which are connected to the threshold element and to the first block of elements And, and the output is connected to one input of the first OR element, a control unit connected to the first trigger, to the second block of AND elements, and to one input of the subtraction unit, the other input of which is connected to the second counter, and the output is connected to the first memory unit, the second memory unit, one input of which is connected to the unit control connected to the first block of AND elements and to one input of the second. of the first OR element, and the third AND element, one input of which is connected to the second trigger, and the output is connected to one input of the second counter, characterized in that, in order to increase the accuracy of the device, the fourth AND element is introduced, the inputs of which are connected to the sync generator and to one the output of the first trigger, the other input of which is connected to the output of the second OR element, the input of which is connected to the second block of AND elements connected to the memory blocks, the third counter connected to the output of the fourth AND element, the fifth AND element, whose inputs connected to the output of the first AND element and the first trigger, and the output is connected to one input of the second trigger, the other input of which is connected to the output of the first OR element, the mode switch connected to the scan generator, to the image signal sensor and to the third counter, output which is connected to another input of the% block of AND elements, and the sixth AND element, the inputs of which are connected to the outputs of the first trigger and sync generator, and the output is connected to other inputs of the first OR element, the second and third counters.