SU1292020A1 - Device for reading graphic information - Google Patents

Description

The invention relates to computing, in particular to semi-automatic devices for reading the coordinates of image elements from a document, the principle of action of which is based on measuring the propagation time of an ultrasonic wave in various media, and can be used to convert complex

the inputs of which are connected to the pulse distributor 22 and the pulse selector 25, and the output is connected to the trigger inputs, the er 15 and the electro-acoustic transducer 28 located on the movable console 29 for entering commands, and the second shaper 30 of the signals connected in series with the elefragraphic information (for example, the And 31 and 32 Groups, code codes) in digital form, followed by its introduction into the computer.

The aim of the invention is to increase the reliability of the device by increasing the reliability of reading the coordinates of the image elements.

The drawing shows a block-c. Schema of the proposed device.

The graphic information reading device comprises a tablet made in the form of a screen, the first electroacoustic converter 2, acoustically connected with the linear coordinate microphones 3 and 4 connected to the coordinate converting units 5 and 6, the outputs of which are connected to one of the inputs of the first 7 and second 8 triggers, the second electroacoustic transducer 9 and the sound receiver 10 connected to the correction block 11, the first output of which is connected to one of the inputs of the first 12, second 13 and third 14 elements AND, and the second Yuchen to the trigger input 15, the output of which is connected to another input element And 14 connected to the counter 16, the first driver 17 signals, the input of which is connected to the counters 16 and 18, and the first output of which is connected to the first register 19 connected to its information inputs and outputs to a computer and to one input of a command generation unit 20, the other inputs of which are connected to counters 16 and 18, and the output is connected to the first switch 21, a distributor 22 of pulses connected to an electroacoustic converter 2, a correction unit 11 and the inputs of flip-flops 7 and 8, which outputs through AND gates 13 and 12 are connected to the counters 16, 23 and T8

24, respectively, a selector of 25 pulses connected to a distributor of 22 pulses 5 a first one-oscillator 26 connected to the selector

25 pulses, element 2 AND-OR 27,

the inputs of which are connected to the pulse distributor 22 and the pulse selector 25, and the output connected to the inputs of trigger, epra 15 and electroacoustic converter 28 located on the movable console 29 for entering commands, and the second shaper 30 of the signals connected in series, connected to the single-oscillator 26, elect0

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connected to the distributor 22 pulses, with other inputs of the element 2И-OR 27, register 33, connected to counters 23 and 24. element AND 34,

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 the OR elements 35 and 36, the HE element 37 located on the same optical axis, a projection cathode ray tube (CRT) 38 with a deflecting system 39 connected to amplifiers 40 and 41 of the electron beam deflection, a beam-splitting element 42, a lens 43, optically connected to the tablet 1., one face of the light-separating element 42 is optically connected through the light guide 44 to the original image 45, and the other through the condenser 46 to the light source 47 is connected in series to the generator 48 clock pulses, element 49, the other input of which is connected en to register 19, the counter 50 of address X, the second one-shot 51, connected to the second input of the first counter 50 of the address and through the element NOT 37 to the first input of the element And 52, and the second counter 53 of the address, the outputs of the counters 50 and 53 of the address are connected respectively to the input digital-to-analog converter 54, the outputs of which are connected to the inputs of amplifiers 40 and 41, to the second input of switch 21 and to the first input of switch 55, another input connected to the output of register 33, and a control input connected to the first input of element 34 is connected to output one-shot a 51, the output of the switch 55 is connected to the inputs of the memory block 56 and the first decoder 57, the output of which is connected to the second input of the memory block 56, the output of which is connected through the AND 52 element to the input of the CRT 38 projection beam modulator and through the AND element 58, the other input of which is connected to the first output of the second decoder 59, - with the second input of register 19, the third input of which is connected to the high-order bit

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the address counter Y, and the second output is connected via an 11PI 35 element, the OTHER input of which is connected to the second output of the decoder 59 connected to the output of the command generation unit 20, with the first input of the trigger 60 the inverse output of which is connected to the third input of the memory unit 56, and with the first input of the OR 36 element, the second output of the control signal generator 17 is connected to the control input of the register 33 and through the delay element 61 to the second inputs of the trigger 60 and the AND 34 element, whose output through the OR 36 element is connected to the fourth input of the block 56 pa ty.

A device for reading graphic information operates as follows.

Before starting, the original image 45, such as a topographic map, is placed on the tablet of the two-coordinate mechanism for moving the light guide 44 (the two-coordinate mechanism and its control scheme are not indicated). When the device is powered on, all multi-stable elements are set to the zero state. (The circuits and installation means are not indicated) and the light flux from the light source 47 through the condenser 46 and the light-emitting element 42 falls on the end of the flexible light guide 44, the other end of which is pressed to the original. 45. Spreading along the light guide 44, the light flux reaches the original 45, is reflected from it and modulated by the image of a topographic second step, the location of the mobile command input console 29 is determined. The signal from the third output of the distributor 22

koi cards follow the same light guide. „

.. „„ - 40 through the first input of element 2И-OR 27

44 back. The modulated luminous flux coming out of the end of the light guide 44 is rotated by the beam-splitting electroacoustic transducer 28 and the trigger 15 is set to one state, which permits the passage of 14 clock pulses from the unit 11 to the subtract input of the counter 16. After the sound signal emitted the electroacoustic converter 28 reaches the sound receiver 10, at the output of the latter there appears a signal that the trigger 15 is set to the zero state and thereby stops passing s clock pulses to the input of the subtraction counter 16.

42 and 90 through the lens 43 onto the working field of the tablet 1. Next, by moving the original 45 on the tablet of the two-coordinate mechanism, the anchor points of the original 45 are optically aligned with the anchorage points of tablet 1.

The device implements two modes of operation: discrete with read accuracy control and continuous with read control, electroacoustic generator 28 is triggered and trigger 15 is set to one state, which permits the passage of 14 clock pulses from block 11 to the input of subtracting counter 16. After when the sound signal emitted by the electroacoustic converter 28 reaches the sound receiver 10, the signal of the trigger 15 is set to the zero state at the output of the latter and amym stopped passing clock pulses to the counter input of subtractor 16.

Vani. Modes of operation of the device for /; - The number currently available is given by the controls shown before

buttons Kn1 and Kn2.

Consider the operation of the device in discrete mode

in counter 16, corresponds to the coordinate X of the console 29 in. the reverse code, and the tact of determining the command input console 29 ends.

accuracy of reading information. This mode is realized when the Kn1 button is turned on, while the Kn2 button is turned off.

5 Electro-acoustic transducer 2 is placed on the working field of the tablet 1, onto which the image of the selected fragment of the topographic map is projected (to the image point, the coordinates of which need to be determined, or to the console point 29 corresponding to a specific command), and pressing the Kn1 button 30 in the distributor, the pulse pulse 22 comes through element I 31 of the signal about device operation in the discrete mode, and the pulse distributor 22 forms the following recalculated device operation cycles.

In the first cycle, the signal from the second output of the distributor 22 starts the electroacoustic converter 9 and the auto-tuning of the clock frequency generator of the correction unit 11 is enabled. After the sound & signal emitted by the electroacoustic converter 9 reaches the sound receiver 10, the output of the last signal appears adjusts the clock generator

Frequency of block 11, where the correction cycle ends and the frequency of the generator corresponds to the current climatic conditions.

In the second cycle, the location of the mobile console 29 for entering commands is determined. The signal from the third output of the distributor 22

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the electroacoustic transducer 28 is started and the trigger 15 is set to one state, which permits the passage of 14 clock pulses from the block 11 to the subtraction input of the counter 16. After the sound signal emitted by the electroacoustic converter 28 reaches the sound receiver 10, the output of the last The signal for setting the trigger 15 to the zero state and thereby stops the passage of the clock pulses to the subtraction input of the counter 16.

The number being by this time

in counter 16, corresponds to the X coordinate of the console 29 in. the reverse code, and the detection timing of the command input console 29 ends.

In the third cycle, the pulse distributor 22 starts (by a signal from the first output) the electroacoustic converter 2 and the triggers 7 and 8 are set to one, which allows the flow of clock pulses from the block 11 to the counters 23 and 24 and to the summing inputs of the counters 16 and 18 through the elements Both 12 and 13. At the moment when the sound signal studied by the electro-acoustic transducer 2 reaches a certain microphone 3 (4), a signal appears at its output, which

in block 20, the formation of commands, through the switch 21 in the computer.

If the operator removes the coordinates of the image point, the read accuracy control is performed as follows.

According to the signal from the second output of the imaging unit 17, the contents of the counters 23 and 24 are recorded in the register 33 and, if there is a signal from the one-shot 51 via the switch, enters the memory unit 56 as the address of the required cell. In this case, the bit signals from the counter 50 of the address are sent to the cipher block 5 (6) of the transform coordinator 57, where they are interpreted as a signal

nat, sets the triggers 7 (8) to the zero state and thereby stops the flow of clock pulses through the elements 12 and (13) to the inputs

The choice of the chip of the desired chip memory block 56. Simultaneously with this signal from the second output, it forms a l 17, having passed the delay element 61

counters 16 (18) and 23 (24). After the element And 34 in the presence of a signal with

As the sound reaches the surface of the microphones 3 and 4, the reading of the coordinates of the point ends.

In the fourth cycle in the driver 17, control signals are generated depending on the contents of the counters 16 and 18.

The following cases are possible.

1. Counter 16 contains a number with a minus sign. This means that the operator shifted the console 29 to the right and removed the coordinates of a point in the part of the image to the left of the console.

2. The content of the counter 16 is positive and does not exceed the number corresponding to the width of the console 29. This

In order to realize the signal arriving at the projection CRT 38 and highlighting a point whose coordinates are recorded in memory block 56, the clock pulses from the generator 48 through the element 49 are fed to the address counter 50. The bit signals from the counter 50 are fed to the input of the digital-analog converter 54, where they are formed into the corresponding voltages, which through the amplifiers 40 and 41 enter the deflecting system 39 of the projection CRT 38. After the end of the line reading

means that the operator has entered from the console

29 specific team and need to form. the discharge of the counter 50 in the one-shot 51 creates a pulse of electron beam quenching during the return stroke and the contents of the address counter 53 is incremented by one. As a result, line-by-line scanning is performed on the screen of the CRT 38. At the same time, the bit signals from the counters 50 and 53, in the absence of a signal from the output of the one-shot 51, go through the switch 55 to the memory block 56. If in the process of reading the line of the memory block 56 there appears 1, then the signal from the output of the memory block 56 through the element 51 enters the input of the beam brightness modulator of the projection CRT 38, while a point is displayed on the screen of the CRT 38, to generate a code commands corresponding to the contents of the counters 16 and 18.

3. The contents of counter 16 are positive, but exceed the number corresponding to the width of the console 29. This means that the operator shifted the console 29 to the left and removed the coordinates of the image point to the right of the console 29.

If the operator removes the coordinates of the point corresponding to a specific command on the command input console 29, the signal from the first output of the imaging unit 17 allows the unit 20 to generate a command code corresponding to the contents of the counters 16 and 18 and is fed to the input of the register 19. The state change in register bits 19 resolution 50

55

em transmission of the command code, the formation of which through the beam splitter

in block 20, the formation of commands, through the switch 21 in the computer.

If the operator removes the coordinates of the image point, the read accuracy control is performed as follows.

According to the signal from the second output of the imaging unit 17, the contents of the counters 23 and 24 are recorded in the register 33 and, if there is a signal from the one-shot 51 via the switch, it goes to the memory block 56 as the address of the necessary cell. In this case, the bit signals from the address counter 50 are sent to a decoder. The choice of the chip of the desired chip of the memory block 56. At the same time, the signal from the second output of the driver 17, the delay element 61 passed and

element And 34 in the presence of a signal with

the one-shot 51, through the IL 36 element, writes to the selected cell of the memory 56 block 56, since the trigger 60 is in the zero state.

In order to realize the signal arriving at the projection CRT 38 and highlighting a point whose coordinates are recorded in memory block 56, the clock pulses from the generator 48 through the element 49 are fed to the address counter 50. The bit signals from counter 50 are fed to the input of a digital-to-analog converter 54, where they are formed into the corresponding voltages that, through amplifiers 40 and 41, enter the deflecting system 39 of the projection CRT 38. After the end of the line reading

element 42 and lens 43 falls on screen 1 at the point whose coordinates were removed by the operator. Since the optical axes of the projection CRT 38 and the source 47 of the light are aligned by the light emitting element 42, the t6 image of the original projected onto the screen 1 is aligned with the light point formed by the projection CRT 38. Two cases are possible.

1. The light spot on screen 1 is aligned with the image point of the original, the coordinates of which are taken by the operator, i.e. the coordinates of the point are read correctly, and the operator removes the coordinates of the next point of the image.

2. The light spot on screen 1 does not coincide with the image point of the original, the coordinates of which are taken by the operator, i.e. The coordinates of the point are not accurate. In this case, the operator enters the Delete command from the mobile console 29. Formed command code

in block 20 enters the decoder 59 The signal from the second output of the decoder 59 through the element OR 35 sets the trigger 60 to one state and through the element OR 36 writes O into the memory cell with the coordinates in register 33. Then the coordinates are entered points. To upload information to the computer after the digitization of the selected fragment from the console 29 is completed, the operator enters the Enter command, resulting in a signal from the output of the decoder 59 that sends And 58 to the element that permits the passage of the signal from the memory block 56. By the same signal, the counters 50 and 53 are reset (the installation circuit is not indicated). Next, information is read from memory block 56. When 1 appears at the output of memory block 56 from the output of element 58, register 19 receives a signal, which means that the coordinates at the input of switch 21 correspond to the coordinates of the read point of the original image, which are transmitted to the computer, On the leading edge of this signal the first output of the register 19 to the input of the element And 49 receives a zero signal, which prohibits the arrival of clock pulses at the input of the counter 50 of address X. The signal from the second input

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register 19, through the element OR 35, the trigger 60 is set to one state, and in the cell of the memory unit 56, from which 1 was read, O is written, i.e. The process of information transfer in a computer is accompanied by the transfer of memory block 56 to the initial state. Upon completion of writing O to memory block 56, the signal from the first output is removed from register 19, which permits further reading of information from memory block 56. On the falling edge of the signal arriving at the third B4 SOD register 19 from the output of the high bit of the counter 53 of the address Y, the input of information into the computer is completed.

Consider the operation of the device in continuous mode.

In the continuous operation mode of the device, the operator places the electroacoustic transducer 2 on the working field of the tablet 1 at the starting point of the image contour and presses Kn1 and Kn2. When the buttons Kn1 and .Kn2 are turned on, the shaper 30 generates a signal about the device operation in continuous mode, which flows through the AND 32 element into the distributor 22 pulses. In this mode, the electro-acoustic transducer. 2 radiates ultrasonic waves continuously with a certain frequency. I.

The distributor 22 pulses organizes the following work cycles.

The first cycle consists of the four steps described. The first cycle of this cycle is similar to that described, in the second cycle - the tact of determining the location of the movable console 29 for entering commands - the console 29 is located when only the first point of the image contour is retrieved. This is achieved by the fact that the signal from the third output of the pulse distributor 22 enters the first pulse extraction selector 25 from the sequence and triggers the electro-acoustic transducer 28 through the third input of element 2I-OR 27 and sets trigger 15 to one state, which allows passage through element 14 clock pulses from block 11 to the input of the subtraction of the counter 16. The further operation of the device in the second cycle coincides with that described.

The third cycle of the device operation is performed in the same way as in the discrete mode. In the fourth, control signals are generated in the driver 17, depending on the contents of the counter 16 and 18,

If the operator enters the command from the console 29, the driver 17 generates a signal that allows the command code to be generated by block 20 and output it to the computer.

If the operator traces the contour of the image on the working area of the tablet 1, then the control of the accuracy of reading information occurs in the same way as described.

When the contour of the image is terminated by releasing the Kn1 button, one vibrator 26 generates a negative impulse that sets the selector 25 to the initial state, with the result that the device is ready to detect the next image contour.

When repeating the acquisition of coordinates in continuous mode, the described cycle repeats. The issuance of information in the computer is similar to that described.

Claims (1)

Invention Formula A device for reading graphic information containing a tablet made in the form of a screen, a first electroacoustic converter acoustically connected with linear coordinate microphones mounted on the orthogonal sides of the tablet and connected to the inputs of the coordinate conversion units whose outputs are connected to one of the inputs first and second triggers, acoustically connected second electroacoustic transducer and a sound receiver connected to the correction unit, the first output of which is connected with one of the inputs of the first, second and third elements And, and the second connected to the first input of the third trigger, the output of which is connected to another input of the third element And the output of which is connected to one of the inputs of the first counter, the first driver signals, the inputs of which are connected to the outputs the first and second counters, and the first output is connected to the first input of the first register, the corresponding inputs and .- ,, five 0 25 thirty 35 50 55 the outputs of which are information inputs and outputs of the device, and to the first input of the command generation unit, the second and third inputs of which are connected to the outputs of the first and second counters, and the output connected to the first input of the first switch, pulse distributor, whose outputs are connected respectively to the inputs of the first electro-acoustic converter and other inputs of the first and second triggers, the outputs of which are connected respectively through the first and second elements And to the inputs of the first, second, third and even of the counters, the pulse selector, the first input of which is connected to one of the outputs of the pulse distributor, the first one-shot, the output of which is connected to the second input of the pulse selector, element 2И-OR, one of the inputs of which is connected to the corresponding outputs of the pulse distributor and the pulse selector, and the output connected to the second input of the third trigger and the input of the third electroacoustic converter, the second shaper of the signals and the elements rpynrfti, the outputs of which are connected to Odam pulse distributor and other inputs of the element 2И-OR, the input of the first one-shot is connected to one of the outputs of the second signal conditioner, the second register, the first input of which is connected to the outputs of the third and fourth counters, the fourth element AND, the first and second elements OR, the delay element and the element is NOT, characterized in that, in order to increase reliability, it contains a projection cathode-ray tube located on the same optical center, a beam-splitting element and an objective lens optically connected with the tablet, as well as the image transmission unit, made in the form of a light guide, a series-connected clock generator, the fifth And element, the first address counter, the second one-oscillator, the second address counter, a digital-to-analog converter and amplifiers, whose outputs are connected to the inputs of the deflection system of a projection FEL tube, the sixth and seventh elements of AND, a quarter trigger m tee, first and second decoders and the second switch, the output of which is connected to the first input of the memory unit and the input of the first decoder, the output of which is connected to the second input of the memory unit, the third input of which is connected to the inverse output of the fourth flip-flop, and the fourth input to the output of the second element OR, the first input of which is connected to the output of the fourth element AND, and the second input - to the first input of the fourth trigger and the output of the first OR element, one of the inputs of which is connected to the first output of the first register, and the other input to the first output of the second decrypt The second output of which is connected to the first input of the seventh And element, the second input of which, connected to the first input of the sixth And element, is connected to the output of the memory block, the output of the seventh And element is connected to the second input of the first register, the second output of which is connected to one from the inputs of the fifth element I, the second output of the first signal conditioner is connected to the second input of the second register and 5 s 15 20 through the delay element — with the second input of the fourth trigger and the first input of the fourth element I, the second input of which is connected to the control input of the second switch is connected to the output of the second one-oscillator, the input of the element NOT and one of the inputs of the first address counter whose output is connected to the input of the digital analog converter and the first input of the second switch connected to the output of the second address counter, the second input of the second switch is connected to the output of the second register, the output of the sixth element I is connected to by the path of the beam intensity modulator of the projection cathode ray tube, the outputs of the first and second address counters are connected respectively to the second input of the first switch and the third input of the first register, with one end of the light guide optically connected to the corresponding edge of the beam-splitting element and the other is the optical input of the device , moreover, the output element is not connected to the second input of the sixth element I. Q Editor A. Vorovich Compiled by V. Kiselev Tehred L.Oleynik Proofreader H, King Order 274/50 Circulation 673 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4