SU1171820A1 - Device for reading graphic information - Google Patents

Description

The invention relates to the field of automation and computing and can be used as a means of reading graphic information from photo media (microfilm) in information and information retrieval systems for inputting it into a digital computer or on a display device simultaneously to several consumers by their requests.

The aim of the invention is to increase the speed of the device.

FIG. 1 is a block diagram of the device; in fig. 2 - the trajectory of the scanning beam, in FIG. 3 - specific implementation of the control unit; in fig. 4 is a specific implementation of a memory block; in fig. 5 is a specific implementation of the information receiving unit and the movie channel control unit; in fig. 6 and 8 - variants of the design of the installation unit of the cassettes in the form of a disk (Fig. 6) and in the form of a drum (Fig. 8); in fig. 7 is a variant of the design of the cassette for information frames on microfilm.

The device contains (Fig. 1) the first trigger 1, the first element And 2, the first selector 3 pulses, the second trigger 4, the first switch 5, the delay element 6, the third trigger 7, the second and third switches 8 and 9, the first element OR 10, counters 11 and 12 lines and frames, first comparison block 13, inverter 14, second pulse selector 15, second comparison block 16, beam deflection blocks 17 and 18 along the X and Y coordinates, memory block 19, indicator 20 performed on a CRT, block 21 scans, shaper 22 signals, the first sensor 23, indicating the turnover of the moving mechanism, the second sensor 24, signaling the installation of the frame in the plane of the CRT, and the control unit 25. The block 21 contains a cassette mounting unit 26 with a drive 27, the first 28 and the second 29 focusing elements, the photomultiplier 30, the amplifier forming 31. In the drawing also until 2

Readable window 32 and device inputs 33 and 34 are shown.

The control unit 25 (FIG. 3) comprises a pulse generator 35, a first key 36, a NOT element 37, a second element OR 38,

5 frequency amplifier 39, a third element OR 40, a second key 41, a third key 42, a fourth key 43, a fourth trigger 44, a pulse shaper 45, a fourth switch 46, and a power amplifier 47.

_{ί0 Memory} block 19 (Fig. 4) contains the second and third elements And 48 and 49, a group of registers 50 (50 _x , 50 _g , „., 50 _n )., the number of which is equal to the number of movie channels (the number of simultaneously read frames) rolling mechanism, the second element 51

15 delays, a group of elements And 52 _g (52 _g , 52 "., X ..., 52 c)., A decoder 53 and a counter of 54 movie channels.

The control unit of movie channels (Fig. 5) contains information receiver 55, pulse generator 56, a group of third sensors 57, signaling frame passage through a readable window 32 (Fig. 1) in each movie channel, fifth trigger 58, fourth And 59, a third counter 60, the sixth flip-flop 61, ras25 predelitel 62 pulses, a comparison circuit 63, decoder 64, a fourth OR gate 65, the third pulse generator 66, the fourth switch 67, a group of power amplifier 68 and a group of stepper motors 69. Typically each film ³⁰ vom channel work about At the same time, two stepper motors, which are controlled in parallel by signals from amplifier 69, however, one motor can work depending on the design of the film channel.

The cassette mounting unit 26 is made in the disk version (FIG. 6), i.e. film channels with cassettes are located in the plane of rotation, or in a drum version (Fig. 8), when the film

40 channels are perpendicular to the flat

bones of rotation and contain (fig. 6 and 8)

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supporting frame 1, film channels 2, block 3 controls movie channels, cassettes with frames 4, guides 5, stepper motors 6, rollers 7, frames of microfilms 8, emitting LEDs 9 sensors 21, signaling about the installation of frames in the field of CRT, emitting LED 10 sensor 23, signaling the revolution of the mechanism, a photodetector 11 (photodiode) of the information receiver, structural elements 12 (TECs), on which the control unit of the movie channels and the information receiver 55 (FIG. 5), sensor 13 (in Fig. 5, block 57) are executed .

A variant of the cassette (Fig. 7) from an opaque carrier, where there are holes 14, necessary for the sensor 57, to signal the passage of frames through the read window 32 and the inserted frames 15 microfilms with graphic information.

Sensor 57 (FIG. 5) is a light emitter (LED), a photodetector (photodiode or phototriode), and a driver connected to the output of the photodetector. When the cassette is moved in the film channel, light is fed through the holes on the photodetector, and pulses appear at the shaper output, the number of which is equal to the number of frames moved through the readable window.

The first 23 and second 24 sensors (Fig. 1) have a similar design, although it is possible to use sensors of a different design. The installation of the mechanism at a given angle and will correspond to the installation of the film channel in the field of reading a CRT.

The device works as follows.

After installing the read frames by the node, the turn-on input signal 33, which sets trigger 4 and 7 to the state "0", and trigger 1, goes to the state "1", writes a unit only to the high order of the counters 11 and 12 lines and frames, sets the selector 15 to its original state and enters the block 25, which sends signals to the actuator 27, under the action of which the node 26 begins to rotate (in Fig. 1, the direction is indicated by an arrow).

As a result of writing, the code 100 ... 0 (one in the high order) is set at the outputs of the meters 11 and 12, which enters the blocks 17 and 18 and determines the deflection current of the CRT 20 equal to half the maximum current (the maximum current corresponds to the code 111, .. .,one). Since there is no signal at the output of the sensor 24, then at the output of the shaper 22 of the signals connected to the modulator of the CRT 20, there is a quenching beam (closing modulator) potential. Therefore, the extinguished beam in accordance with the codes 100 ... 0 of counters 11 and 12 goes to the center of the screen at point A (Fig. 2).

As soon as the window with the microfilm frame is installed in the plane of the CRT 20, a signal appears at the output of the sensor 24, which enters the shaper 22. As a result, a beam light signal is generated at the output of the shaper 22 (i.e., the blanking potential is removed) and the CRT beam 20 is illuminated, and since the node 26 rotates, the window 32 with the frame goes out of the plane of the CRT. Therefore, the signal at the output of the sensor 24 disappears, and therefore, the beam of the CRT 20 is extinguished. When installing the second, third, etc. frame in the plane of the CRT 20 (in Fig. 1, the frame numbers are indicated by Roman numerals) the described process of illumination of the beam repeats, but as soon as the node 26 makes one turn, the sensor 23 is triggered. The signal from the output of the sensor 23 is supplied to the And 2 element, which is open for the passage of pulses with high potential from the output of the trigger 1. Since the triggers 4 and 7 are in the “0” state, the switch 5 is connected to the switch 9, and the switches 8 and 9 are connected to the subtractive inputs (-) of counters 11 and 12. Therefore, the first pulse appearing at the output of the element And 2, goes through to Switches 5 and 9 on (-) the input of the counter 12 frames and reduces its content by one. As a result, the code 011 ... 1 appears at the output of the counter 12 and the extinguished beam moves to point B (Fig. 2), and the code 100, ..., 0 is set at the output of the inverter 14, while the contents of the counter 11 do not change.

Consequently, at the output of block 13, an impulse appears, which enters the selector 15, designed to separate even and odd pulses. Since the first pulse received in the selector will be odd, it goes from the output of the selector 15 through the element OR 10 to the counting input of the trigger 4 and sets it to the state "1". As a result, the switch 5 is connected to the switch 8.

When installing the first, second, etc. The frame in the plane of the CRT 20 illuminates the second point of the CRT screen, while it is clear that the number of light pulses is equal to the number of frames set for reading at node 26. The light spot from the screen of the CRT 20 is transferred by the focusing element 28 onto the surface of the microfilm frame to window 32, is modulated the density of the blackening of the microfilm and is collected by the element 29 on the photosensitive surface of the PMT 30, which converts the luminous flux into an electrical signal supplied to the amplifier-former 31.

At the end of the turnover of the node 26, a second signal appears at the output of the sensor 23,

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which from the output of the element And 2 through the switches 5 and 8 enters the (-) input of the counter 11 lines and reduces its content by one. As a result, the extinguished beam moves to point B (Fig. 2), and the output of the counter 11 is set to code 011 ... 1. Since the contents of the counters 11 and 12 turn out to be equal, and the trigger 1 is in the state "1", then the output block 16, a pulse appears, which is fed to the counting input of the trigger 7, and through the element OR 10 - to the counting input of the trigger 4 and changes their state to the opposite. Thus, the trigger 7 is set to the state "1" and switches the switches 8 and 9 to the summing inputs (+) of the counters 11 and 12, and the trigger 4 goes to the state "0" and the switch 5 is again connected to the switch 9.

At the end of the turnover, the next signal from the output of the And 2 element passes through the switches 5 and 9 to the (+) counter input of 12 frames and increases its content by one. At the output of the counter 14 will be code 100 ... 0 and the extinguished beam moves to point G (Fig. 2), and the output of the inverter 14 sets the code 011 ... 1. So the contents of counter 11 (code 011 ... 1) has not changed, then at the output of block 13 a second pulse will appear, which goes to selector 15. Since the second pulse (its number) is even, then from output of selector 15 it goes to selector 3 pulses, designed to highlight a single pulse, and sets the selector 3 to its original state, i.e. allows the selection of a single pulse from a sequence of pulses coming from the output of an element And 2.

Consequently, the next signal from the sensor 23 from the output of element 2 will be allocated by the selector 3 and from its output will go to the element 6 of the delay. At the same time, this next signal from the output of the And 2 element passes through the switches 5 and 9 to the (+) counter input of 12 frames and increases its content by another one. At the exit of the counter 12, a code 10 ... 01 is set and the extinguished beam moves to point D (Fig. 2).

The pulse selected by the selector 3, appearing at the output of the delay element 6, passes through the element OR 10 and, having entered the counting input of the trigger 4, changes its state to the opposite. As a result, trigger 4 is set to state "1" and connects switch 5 to switch 8. Delay on element 6 is necessary for the impulse to be counted by counter 12 before switch 5 switches. The next sensor signals 23 from the output of element 2 will be received through switches 5 and 8 to the (+) inputs of the counter 11 lines until

the contents of counters 11 and 12 do not match (in Fig. 2, point E). As a result, at the output of block 16, a second pulse appears, which changes the state of triggers 4 and 7 to the opposite. Therefore, both the trigger 4 and 7 are returned to the state "0".

The described process of illumination of the beam and scanning continues until the 12-frame counter is completely filled (until its content becomes equal to Г1 ... 1), and the beam does not move to point Ж (Fig. 2). In this case, the state of the trigger 4 determines the coordinate of the sweep, and if the trigger 4 is in the state "0", then the sweep goes along the Y coordinate, and if in the state "1" it goes along the X coordinate. The state of the trigger 7 determines the direction of the sweep, and if the trigger 7 is in the state "0", the scan is carried out in the opposite direction (reducing the contents of the counters 11 and 12), and if in the state "1" - then in the forward direction (increasing the contents of the counters 11 and 12). If, during scanning, the light spot of the CRT 20 goes to a line or point of graphic information, then a pulse appears at the output of the amplifier-shaper 31, which rewrites the contents of counters 11 and 12 into the cell of the memory block 19 corresponding to this frame number, since the trigger 1 is located in the state "1" and allows you to record information. From memory block 19, the coordinates of the read points of each frame of graphic information are output at the output of the device to the appropriate communication channel to the consumer.

If the contents of counter 12 will be 11 ... 1, and the counter 14M 8 00 ... 0 (Fig. 2, point G), then the code 00 ... 0 will be set at the output of the inverter 14. According to the comparison signal from block 13, the triggers 4 and 7 do not change their state to the opposite until the pulse selected by the selector 3 passes the delay element 6 and arrives at their counting input. Consequently, another impulse will go to the (+) input of counter 12 and cause it to overflow. As a result of the transition of counter 12 from state 11 ... 1 to state 00 ... 0, a transfer pulse appears at its output, which resets trigger 1 to state 0 and the process of reading information frames is automatically terminated. At the same time, the transfer pulse enters block 25 and prohibits the signals from being sent to actuator 27. As a result, node 26 stops rotating, and the information carriers return alternately to the drums AND PS.

The control unit 32 operates as follows.

In the mode of inserting the cassettes into the cassette installation unit 26, the signal from the input 34 through ele1171820

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ment OR 38 sets the trigger 44 to the state "1". Since in this mode the trigger 1 is in the state "0", the key 36 is closed, the key 41 through the element NOT 37 is open. Therefore, the pulses from the output of the generator 35 through the frequency divider 39, the public key 41, the key 43, open high potential from the output of the trigger 44, arrive at the input of the shaper 45, which converts the input pulses of arbitrary shape into rectangular pulses of the desired duration. From the output of the shaper 45, the rectangular pulses go to the switch 46, which converts the incoming sequence into rectangular pulses, which through the power amplifier 47, consisting of the same type of channels, are fed to the stepper motor windings 27. At the time of installation of the film channel of the node 26 above the drum extraction mechanism The IPA (this moment is combined with the moment of setting the frame in the CRT field), from the sensor 24 receives a signal that passes through the key 42, opened by the potential from the output of the element NOT 37, the element OR 40 and the mouth sets trigger 44 to "0" state. As a result, the key 43 is closed for the passage of pulses into the imaging unit 45 and, consequently, the rotation of the node 26 stops. After inserting the cassette into the film channel and installing the required frame at the window 32, a new start signal is sent to the input 34. The described work process continues until all cassettes are inserted into the node 26.

In the information reading mode, the switch-on signal from the device input 33 goes through the OR element 38, to the input of the trigger 44 and sets it to the state "1". The same signal also sets the trigger 1 to the state "1". As a result, the key 41 will be closed with a low potential from the output of the element NOT 37, and the key 36 will now open for the pulses from the generator 35. These pulses from the output of the key 36 through the key 43 are fed to the input of the former 45 and cause the rotation of the node 26. At the same time, its rotational speed will be higher, since the drive 27 is affected by a higher pulse repetition rate of the generator 35 (there is no frequency division). Upon completion of the frame reading process from the output of the 12-frame counter, a transfer pulse is received, which sets trigger 1 to the “0” state, and through the OR 40 element and trigger 44, which closes the key 43 for the passage of pulses into the imaging unit 45. As a result, the node 26 decreases the speed rotation and stops.

In the process of returning the cassettes with frames to the drums of the IPS, unit 25 operates in the same way as in the input mode of the cassettes.

The memory unit 19 operates as follows.

The high potential from the output of trigger 1, which is set to the state "1" by the turn-on signal, opens elements 48 and 49 for passing the signals arriving at them. When installing the first frame in the CRT readout field from the sensor 24, a signal is received that passes through the AND 49 element to the input of the counter 54. At the initial moment, the counter 54 is reset (its content is zero), so the unit will be written in it, and the first output of the decoder 53 connected to the counter 54, a high potential will appear, opening the first element AND 52 groups. If the light spot of the beam of CRT 20 reached the point of graphic information, then the output of the amplifier-shaper 31 appears a signal that passes through the element And 48, the element 51 delay and enters the inputs of the group of elements And 52. The delay on the element 51 is necessary in order the signal from sensor 24 could be counted by counter 54 before the signal from amplifier-shaper 31 arrives. Since only the first element of group 52 is open, the pulse from its output records the contents of counters And 12 lines and frames determining the position of the spot on the screen Uh LT (and therefore, the coordinates of the read point) in the first register of the 50ι group. When installing the second, third frame, etc. in the field of a CRT 20, the contents of the counter are successively increased, and the decoder 53 sequentially opens the subsequent elements And 52 _g .

52z, ..., 52 _n groups. Consequently, · the pulses from the amplifier-shaper 31 at the time of exit to the graphic information sequentially pass through only one of the And 52 elements that correspond to the contents of the counter 54 and record the read coordinates into the corresponding register 50 (cell). When making one turn node 26 from the sensor 23 receives a signal that resets the counter 54 to “0”, and the described operation process of the memory unit 19 is repeated.

Node 26 installation of the cassette works as follows. In the input mode of the cassette using a transmitting element made on the radiating LED (for example, infrared radiation), the movie channel control unit (3 in Fig. 6, Fig. 1 is not shown) is sequentially transmitted information about the number of the film channel and frame, as well as the mode of operation, which is a sequence of pulses of different durations.

The transmitted unit of code corresponds to a pulse of one duration, and to a transmitted zero — two times shorter. Radiated luminous flux at 1171820

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It is detected by a photodetector (for example, a photodiode or phototransistor) 70 of information receiver 55 (in Fig. 6. Pos. 11) installed in the center of node 26 (Pos. D) and transformed into rectangular pulses with the help of shaper 71. These pulses of various durations arrive at the selector 73, as well as into the driver 72, which, on the leading edge of each incoming pulse, produces a short sync pulse. The selector 73, designed to select signals by duration, selects pulses of only one duration, namely, the corresponding transmitted unit, which is fed to the input of the shift register 75. Sync pulse from the output of the shaper

72 through the delay element 74 enters the other input of the register 75. The delay on the element 74 is such that it allows the sync pulse to move in time to the middle of the pulse duration corresponding to the transmitted zero. Consequently, if the signal from the selector 73 arrives at the input of register 75, then a clock will be recorded in the first digit of the register, and if it does not, then zero. Since the register

73 shift, then each subsequent clock pulse will shift the previous information (information bit) to the next bit, and then write a new one to the first bit. Thus, the transmitted information is received, while the high bits of the register 75 determine the number (code) of the film channel, the middle bits 75 - the code of the required frame, and the first and second bits 75 - the mode. If a unit is recorded in the second digit, then this is the input mode, if the unit is in the first digit, then this corresponds to the cassette return mode. It is obvious that if in the first digit of register 75 there will be one, then in the second zero and vice versa. The decoder 64, connected to the high bits of the register 75, provides the appropriate control to the switch 67, which selects the desired film channel.

The unit from the second digit of the register 75 sets the trigger 61 to the state "0", and through the element OR 65 — to the trigger 58 to the state "1". As a result, the pulses from the output of the generator 56 through the high potential element And 59 enter the distributor 62, which sets the sequence of pulses, which through the switch 67 goes to the amplifier 68 of the power of the selected channel and causes _: the rotation of the stepper motor 69 of the channel that the cassette is captured rollers (pos. 7 in Fig. 6) and moves along the guides (pos. 5) to the center of the node 26. When you move the cassette (pos. 4) from the sensor 57 (pos. 13), which represents

a pair of emitting diode - a photodiode, receives pulses, the number of which is equal to the number of 32 frames that have passed through the readable window (position 16 in Fig. 8). These pulses are written to counter 60. The contents of counter 60 are fed to circuit 63, which also receives the number of the required frame (middle bits of register 75) from register 75. When comparing the codes at the output of circuit 63, a signal appears that the driver 66 produces a pulse; which resets to state "0" the counter 60, and the trigger 58 sets to the state "0".

This leads to the fact that the element And 59 is closed for the passage of pulses, and the stepping motor (pos. 6) 69 stops the movement of the cartridge, i.e. sets the required frame in a readable window 32.

Similarly, other cassettes are inserted into the remaining movie channels and the required frames are set.

In the cassette return mode, the film channel control unit, frame number and mode code (one in the first digit) are fed to the movie channel control unit. A single signal from the output of the first digit of the register 75 sets the trigger 61 to the state "1", and through the element OR 65 it triggers the trigger 58. Node 26 works in the same way as when inserting the cassette, however now the valve 62 sets the reversing mode in which the stepping motor 69 of the selected channel moves the cassette from the center. When the cassette is returned to the IPS drum, a sensor is triggered (a pair of LED-photodiode), signaling the release of the film channel from the cassette. The pulse from the output of this sensor resets the trigger 58 to the “0” state, which causes the engine 69 to stop. Similarly, the rest of the cassettes are returned to the storage. The supply voltage is transmitted to the node 26 through the sliding contacts.

The second comparison unit 16 comprises a serially connected comparison circuit, a pulse shaper, a delay element, and a coincidence circuit. Counters 11 and 12 lines and frames are connected to the comparison circuit, and the first trigger 1 - to the coincidence circuit, the output of which is the output of the block.

Block 16 works as follows.

In case of equality of the codes of the meters 11 and 12, a high potential appears at the output of the comparison circuit, according to which the driver generates a pulse. This pulse arrives at the coincidence circuit, the second input of which is connected to the output of trigger 1. If trigger 1 is in state "1". then the coincidence circuit will be opened and the equality impulse passes to the output of the block

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16, and if in the “0” state, the equality impulse does not pass. Therefore, at the moment of writing the unit to the most significant bit of the counters 11 and 12, the pulse enable signal on

the output of the comparator block 16, the trigger 1 will be set to the state "1" with a delay (for example, on the falling edge of the turn-on signal).

FIG. 2

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4

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Fi d. 6

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'Wed St,

Claims (3)

1. DEVICE FOR READING GRAPHIC INFORMATION, containing the first trigger, one input of which is the first input of the device, and the output is connected to one input of the memory block and one input of the first And element, the output of which is connected to one input of the first switch and the first selector, indicator, the inputs of which are connected to the signal conditioner and the beam deflection blocks, the inputs of which are connected to the outputs of the corresponding row and frame counters, the second trigger, one input of which is the first input of the device, the other with It is connected with the output of the first element OR, and the output is connected to another input of the first switch, the outputs of which are connected to one input of the second and third switches, the other inputs of which are connected to the output of the third trigger, and the outputs are connected to one input of the corresponding row and frame counters, other inputs which are the first input of the device, an inverter, the input of which is connected to the output of the frame counter, and the output is connected to one input of the first comparison unit, the other input of which is connected to the output of the row counter, and the stroke is connected to one input of the second selector, the other input of which is the first input of the device, and the outputs are connected to another input of the first selector and to one input of the first OR element, the other input of which is connected to a delay element connected to the output of the first selector, the second comparison unit, the inputs of which are connected to the outputs of the memory unit, the row counter and the first trigger, and the output is connected to the other inputs of the first OR element and the third trigger, and the scanning unit, optically connected with the indicator, while the output snip score lines connected to the memory unit, whose output is the output device, characterized in that, in order to increase speed, it comprises a first sensor signal, the output of which is connected to another input of AND gate and input of Bloch _Λ ka memory, a second sensor signals The output ® of which is connected to the signal conditioner and to the corresponding input of the memory block, the control unit, the first and second inputs of which are the first and second inputs of the device, the third, fourth and fifth inputs are connected to the frame counter outputs, the first about the trigger and the second sensor signal, and the output is connected to the input of the scanning unit, the output of which is connected to the corresponding input of the memory block. 2. Device by π. 1, characterized in that the control unit contains the first key, one input of which is the fourth input of the block, the other connected to a pulse generator connected to the frequency amplifier, the element NOT whose input is the first input of the block and the output connected to one input of the second and third keys, the second element OR, whose inputs are the first and second inputs of the block, and the output is connected to one input of the fourth trigger, the other input of which is connected to the output of the third OR element, one input of which is the third input of the block And the other connected to the output of the third switch, and the other input koto5, .., 1171820 1171820 Pogo is the fifth input of the block, and the fourth key connected in series, the inputs of which are connected to the outputs of the first and second keys and the fourth trigger, pulse shaper, the fourth switch and the power amplifier whose output is the output of the block. 3. Device by π. 1, characterized in that the scanning unit comprises successively optically coupled first focusing element, the input of which is the first input of the unit, the installation unit cassette, the drive input of which is the second input of the unit, the second focusing element and the photomultiplier tube which output is connected to the amplifier driver, the output of which is the output of the block. one