SU1282170A1 - Device for reading graphic information - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used in processing systems for meteorological, cartographic and other graphical information. The purpose of the invention is to simplify the device. The device contains a tablet 1 with the systems mutually

Description

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H t.) 1-onnyy current-carrying busbars 2 h 3, two groups of coordinate keys A and 5, each of which contains four keys, control block 7, three triggers 8, 15 and 2.2, six elements And 23- 27, 29-31, generator 17 of sinusoidal oscillations connected in series by a puller of 10 coordinates, amplifier 11, a time pulse converter 12, a meter 13 and two pe.iiepcHpHf.ix counters 28. Time pulse A converter 12 contains a series-connected phase pulse generator 14 trigger 15 and the element And 16. The control unit consists of sequentially with unity oscillator 17, frequency divider 18 and the decoder 19. 1 yl.

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The invention relates to automation and computing, in particular to reading graphic information, and can be used in processing systems for meteorological, cartographic and other graphic information. I

The purpose of the invention is to simplify the device.

The drawing shows a diagram of the proposed device.

The device contains a tablet 1 with systems of mutually orthogonal busbars 2 and 3 (the bus width is 4/5 where is the tire pitch of the tablet). connected to the outputs of the coordinate keys 4 and 5 of the two groups, each of which contains four keys 6, a control block 7 connected via the first trigger 8 with in, are the corresponding keys, and their coordinate keys 4 and 5 groups, the second inputs of which are connected to the outputs generator 9 sinusoidal oscillations, serially connected puller 10 coordinates, amplifier 11, time - pulse converter 12 and counter 13. Time pulse converter 12 contains series connected phase pulse generator 14, trigger 15 and element 1 6 and element 16. The other two inputs of the time of the pulse converter 12 are connected respectively to the output of the generator 9 sinusoidal oscillations and the control unit 7, which is a series-connected generator 17, a frequency divider 18 and a decoder 19. The outputs of the counter 13 and the trigger 8 are connected to the output

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Device 20 and 21. Each coordinate has a trigger 22 (second and third triggers), the D input of which is connected to the unit output of the first most significant (nth) bit of counter 13, the trigger input of trigger 22 through the first and second elements And 23, the second inputs of which are connected to the output of the trigger 8, are connected to the output of the control unit 7. The single and zero outputs of the flip-flops 22 are connected to the first inputs of the fifth, sixth, seventh and eighth elements AND 24 and 25, the second inputs of which are respectively connected to the zero and single outputs of the first most significant (n-th) counter 13. 13. The output of the n and the sixth element And 24 through serially connected ninth and eleventh elements And, as well as through the tenth and twelve elements And 26 and 27 are connected to the summing inputs of reversible counters 28. The output of the seventh and eighth elements And 25 through sequentially connected thirteen The first and fifteenth, and tatok through the fourteenth and sixteenth elements And 29 and 30 are connected to the subtractive inputs of the reversible counters 28. The second inputs of the elements And 26 and 29 are connected respectively to the zero and single outputs of the second most senior (nl) -oro) counter of the counter 13. The second inputs of the elements 27 and 30 are connected to the output of the element 31, the second inputs of which are connected to the output of the control unit 7 and the trigger 8. The zero inputs of the triggers 22 and the reversible counters 28 and the information output of the reversible counters 28 are connected respectively to the input om 32 and the outlet 33 of the device.

The control unit 7 is designed to generate control signals and synchronize the sequence of operation of the device for reading and forming the output digital coordinate code X and Y of the puller position of 10 coordinates.

Amplifier 11 is designed to amplify the output signal from the output of the coordinate remover and the amplitude of discrimination of the moment of passage of a sinusoidal voltage across the zero from the negative7., Half-half into positive.

Phase pulse shaper 14 is designed to form a single pulse.

The device works as follows

In the initial position of the puller 10 coordinates (left bottom edge of the plate 1), the reversible counters 28 and the triggers 22 are set to the zero state by the input signal 32 of the device.

The generator 17 emits pulses of a stable frequency, which are fed; To the input of the frequency divider 18 and element 16. The decoder 19 is connected to the higher bits of the divider 18.

frequencies, forming a continuity., pulses, which are output y-rv signals of control unit 7. The generator 9 of sinusoidal oscillations from the pulses of a stable frequency of the divider 18 frequency produces Q sinewavely shifted four sinusoidal voltages relative to each other by a quarter period, which are supplied to the corresponding inputs of the keys 6 of the first and second groups of coordinate keys 4 and 5.

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The control unit 7 periodically generates control signals that alternately set the trigger 508 to the one and zero state. When the trigger 8 is set to one, the enable input signal is supplied to the control input of the first group of coordinate keys 4, and the keys 6 pass the sinusoidal output voltages of the generator 9 and are sinusoidal & fluctuations on the vertical .5 Yu

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current busbars 2 of the plate 1. By the signal of the generator 9 of sinusoidal oscillations, the trigger 15 is set to one. The 10-coordinate remover converts the electric field of the plate 1 formed by four sinusoidal voltages on the vertical current-conducting busbars 2 to the phase-modulated sinusoidal voltage, which through the amplifier 11 enters the input of the phase generator 14 of the phase pulse that produces a reference frequency pulse, phase which is proportional to linear displacement. of the puller 10 coordinates on the interval of four conductive vertical busbars 2. This phase pulse sets the trigger 15 to the zero state. Therefore, a pulse signal is formed at the output of the latter, the duration of which is proportional to the linear movement of the puller 10 coordinates on the interval of four busbars 2, the input time of the pulse converter 12 receives pulses of the stable frequency of the generator 17, and, consequently, the number-pulse code of the coordinate X, obtained at the output of element II 16, corresponds to the ordinate position of the puller is 10 coordinates on the interval of four tires 2. Counter 13 converts the pulse number code into a postive one. Since the conversion is carried out cyclically, when the puller moves 10 coordinates in the interval of four conductors of the axle bus 2 plani and circuit 1, the code acquired in the counter 13 changes smoothly from zero to one in all its bits. With further movement of the puller 10 coordinates, the code change in the counter 13 is repeated in a similar way. Consequently, the code of the two star- ing bits of them in turn takes on one of four values: 00,10,01,11,00 ... when the puller moves 10 coordinates in the forward direction and 00,11,01,10,00. ... when moving (in the opposite direction. The period is changed is equivalent to the interval of four tires 2 of tablet 1, and with each change of state, nor the first senior (n-th) discharge of counter 13, the state of the second most powerful C-1) th digit of counter 13 characterizes the direction of movement of the puller 10 coordinates. In each

 The current coordinate reading cycle, after forming the position code in counter 13, compares the current state of the first senior (nth) bit 13 with its previous cycle state recorded in trigger 22. This recording is performed by the output signal of control unit 7 through element 23. And the change in the state of the first high (n-th) bit of counter 13 is determined by elements 24 and 25. When the state of the first high (n-th) bit of 13 from 1 in O changes, the logical 1 signal is generated element output 24 and enters the input of the AND element 26. When changing the state of the first senior (nth) discharge counter 13 from D 1 signal is logical 1 is generated at the output of the third AND gate 25 and input to AND gate 29.

scrap logical 1 element AND 27 or element AND 30 is fed to the summing or subtracting input of the reversible counter 28. Then control unit 7 generates a pulse signal for overwriting the state of the first most significant (nth) counter of the counter 13 into trigger 22, which through the element And, 23 arrives at the input of sync synchronization trigger 22. In this case, the codes of the counter 13 and the reversible counter 28 together represent the complete code of the X coordinate read.

J5 After reading the X coordinate

the control unit 7 generates a control signal which sets the trigger 8 to the zero state. The signal of the zero output of the trigger 8 and the 20 turns to the control input of the second group of coordinate keys 5. At the same time, the keys 6 of the first group of coordinate keys 4 are closed, and the second group of coordinate keys 5 is off. When the puller moves 10, the coordinates 25 and the output generator voltage 9 sinusoidal oscillations are fed to the horizontal current-conducting bus 3 tablet 1. Forming the coordinate code At the puller

The dinat in the range of four tires 2 of plate 1 in the forward or reverse direction of the state of the first senior (n-th) counter of counter 13 is changed twice: from O to 1 and from 1 to O or vice versa from 1 to O and from to 1. Therefore the signal is logical

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The 30 10 coordinate is similar. At the same time, the elements of the second coordinate start to work: the trigger 22, the reversible counter 28 and the eight elements 23-27,.

1 Appears once at the input of the element AND 26 and once at the input of the element AND 29. Due to the fact that the sig g Counter codes 13 and the reversible count of the zero output of the second master 28, together represent the complete (nl) -ro discharge counter 13 is fed to the second input of the element And 26, the signal of the single output of the second high (nl) -ro discharge counter 13 arrives at the second input of the sixth

readable coordinate code

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Thus, the proposed technical solution does not require the presence of additional groups of keys with a large number of keys in each coordinate group and a shift register with a large number of bits. AT

element AND 2.9, then when moving the puller 10 coordinates in the forward direction, the logical 1 signal appears only at the output of the element 26 and when the puller moves 10 coordinates in the reverse direction, the logical 1 signal appears only at the output of the element 29. The output signals of the elements And 26 and 29 arrive at the first inputs of the elements And 27 and 30, respectively. At the end of each coordinate reading cycle, the output pulse signal of control unit 7 passes through element 31 and enters the second inputs of elements 27 and 30, and depending on the direction of movement of the puller 10 coordinates through an open signal of logic 1 element 27 and element 30 also enters to the summing or subtracting input of the reversible counter 28. Then the control unit 7 generates a pulse signal for overwriting the state of the first most significant (nth) counter of the counter 13 into a trigger 22, which through the element 23 goes to the input b 10 chronization trigger counter 22. In this case codes 13 and down counter 28 together represent a complete code readable coordinates X.

J5 After reading the X coordinate

the control unit 7 generates a control signal which sets the trigger 8 to the zero state. The signal of the zero output of the trigger 8 through 20 is activated at the control input of the second group of coordinate keys 5. The keys 6 of the first group of coordinate keys 4 are closed, and the second 10 coordinates are carried out similarly. At the same time, the elements of the second coordinate start to work: the trigger 22, the reversible counter 28 and the eight elements 23-27,.

The codes for the counter 13 and the reverse counter 28 together represent the complete

The codes of the counter 13 and the reversing chick 28 together represent

readable coordinate code

The odes of counter 13 and reversible counter 28 together represent the complete

Thus, the proposed technical solution does not require the presence of additional groups of keys with a large number of keys in each coordinate group and a shift register with a large number of bits. AT

In particular, for a 1000x1000 mm tablet with a tire pitch of 5-10 km, no additional 200 to 400 keys and a shift register per 100 to 200 bits are required. The proposed arrangement also does not require a circuit for matching the samples and correcting the coarse code. As a result, a significant simplification of the device has been achieved, since the volume of its electronic equipment is significantly reduced. At the same time, technical parameters on the accuracy and size of the working range are saved.

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invention formula

A device for reading graphic information containing a tablet with systems of mutually orthogonal conducting buses connected to the outputs of the coordinate keys of the first and second groups, a matcher unit, the first and second outputs of which are connected to the inputs of the first trigger, the outputs of which are connected to the first inputs of the coordinate keys of the first and the second groups, the second inputs of which are connected to the outputs of the generator of sinusoidal oscillations, sequentially connected information remover, amplifier,: time pulse converter There is also a C1 cell, the output of which is the first output of the device, the second output of which is one of the outputs of the first trigger, one of the inputs of the time of the pulse converter. Unavailable with a corresponding generator output of sinusoidal oscillations and a third output of the control unit, characterized in that, in order to simplify the device, it will keep the second and third triggers, sixteen AND elements, the first and second reversible counters, whose outputs are the third output of the device, the first inputs The first and second elements And are connected to the fourth output of the control unit, the fifth output of which is connected to the first inputs of the third and fourth elements And, the second inputs of the first, second of the third and fourth elements The entrances And are connected to the corresponding inputs of the first trigger, the D inputs of the second and third triggers are connected to the unit output of the first most significant bit of the counter, and the codes of the first and second elements I are connected to the synchronization inputs of the second and third triggers, the unit outputs of which

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connected respectively to the first inputs of the fifth and sixth elements And, the second of which are connected to the single output of the first most significant bit of the counter, zero outputs of the second and third triggers are connected respectively to the first inputs of the seventh and eighth elements And, the second inputs of which are connected to the single output of the first senior discharge counter, the output of the pth element And is connected through the series-connected ninth and eleven elements And to the summing input of the first reversible counter, the output of the sixth element This AND is connected via serially connected tenth and twelfth elements And to the summing input of the second reversible counter, the output of the seventh element H is connected via serially connected thirteenth and fifteenth elements And to the subtracting input of the first reversible counter, the output of the eighth element And connected through serially connected fourteenth and sixteen elements H to the subtractive input of the second reversible counter, the output of the third element I is connected to one of the eleventh and fifteen inputs The first element: And, the output of the fourth element, And is connected to one of the inputs of the twelfth and sixteenth elements, Iv, One of the inputs of the ninth and tenth elements, And is connected to the zero output of the second most significant bit of the counter, the unit output of which is connected to the corresponding inputs the thirteenth and fourteenth elements And, the sixth output of the control unit is connected to the control input of the generator of sinusoidal oscillations, and the zero inputs of the second and third triggers, the first and second reversing counters are the input of the device oystva

Claims (1)

Claim A device for reading graphic information containing a tablet with systems of mutually orthogonal conductive buses connected to the outputs of the coordinate keys of the first and second groups, a control unit, the first and second outputs of which are connected to the inputs of the first trigger, the outputs of which are connected to the first inputs of the coordinate keys of the first and second groups, the second inputs of which are connected to the outputs of the sine oscillator, sequentially connected information stripper, amplifier,: time-pulse converter and count a sensor, the output of which is the first output of the device, the second output of which is one of the outputs of the first trigger, one of the inputs of the time-pulse converter is connected to the corresponding output of the sine wave generator and the third output of the control unit, characterized in that, in order to simplify the device, it contains a second and the third triggers, sixteen AND elements, the first and second reversible counters, the outputs of which are the third output of the device, the first inputs of the first and second elements AND are connected with the fourth output of the control unit, the fifth output of which is connected to the first inputs of the third and fourth elements And, the second inputs of the first, second, third and fourth elements And are connected to the corresponding inputs of the first trigger, D-inputs of the second and third triggers are connected to a single output of the first the highest level of the counter, the outputs of the first and second elements AND are connected to the synchronization inputs of the second and third triggers, the unit outputs of which are connected respectively to the first inputs of the fifth and sixth elements And, the second inputs of which are connected to the single output of the first high-order bit of the counter, the zero outputs of the second and third triggers are connected respectively to the first inputs of the seventh and eighth elements And, the second inputs are connected to the single output of the first high-order bit, the output of the fifth element And is connected in series connected the ninth and eleventh elements And to the summing input of the first reversible counter, the output of the sixth element And is connected through the tenth and twelve connected in series the fourth element And to the summing input of the second reversible counter, the output of the seventh element And is connected through the serially connected thirteenth and fifteenth elements And to the subtracting input of the first reversible counter, the output of the eighth element And is connected through the serially connected fourteenth and sixteenth elements And to the subtracting input of the second reversing counter, the output of the third element And is connected to one of the inputs of the eleventh and fifteenth elements And, the output of the fourth element And is connected to one of the inputs of the twelfth and sixteenth elements AND, one of the inputs of the ninth and tenth elements of AND is connected to the zero output of the second high-order bit of the counter, the single output of which is connected to the corresponding inputs of the thirteenth and fourteenth elements of AND, the sixth output of the control unit is connected to the control input of the sinusoidal oscillator , and the zero inputs of the second and third triggers, the first and second reverse counters are the input of the device. . Compiled by T. Nichiporovich