SU1089598A2 - Graphic information readout device - Google Patents

Abstract

DEVICE FOR READING GRAPHIC INFORMATION on aut.St. No. 890416, characterized by the fact that, in order to increase the device speed, the OIO contains the second OR element, one input of which is the device input, the other is connected to the output of the coordinate remover, and the output is connected to the pulse generator, and connected the third element OR, one input of which is connected to the decoder, the first trigger, the other input of which is connected to the output of the coordinate remover, the second trigger, the other input of which is connected to the decoder, and the output is the second output of the device, and the item NID whose other input is connected to the decoder, and the output is connected to another input of the third element OR. (L with CX) with O1 with 00

Description

The invention relates to automation and computing technology, can be used to read and enter graphic information into electronic computers, mainly in computer-aided design systems equipped with dialog tools. According to the main auth. 890416, a device containing a plate with coordinate buses connected to respective switches, the inputs of which are connected to the output of the first decoder, the input connected through a counter to the first output of the second decoder, the second input which is connected to the first input of the first memory block, the second input the first memory block is connected to the first output of the amplifier, the input connected to the coordinate remover, and the second output to the input of the inverter the output connected to the first input of the third memory block, the second input and the output to the first input of the first OR element and to the first input of the second comparison unit, the output connected to the first input of the second And element, and the second input to the output of the first memory block that is connected to the second input the first OR element, in turn, connected via an analog-digital converter with a computing unit, a second input connected to the fourth output of the second decoder, the fifth output of which is connected to the first input of the first comparison unit and through the second memory unit with the second input of the first comparison unit, the third input connected to the output of the computing unit, and the output through the second counter - with the first input of the first element I, the second input connected to the output of the counter, the third input with the sixth output of the second decoder, the second input The second element And is connected to the output of the encoder, a pulse generator connected through the address register, a node of the permanent memory and a register of operations with the VTOELM decoder, the third input of the second element And is connected to the second output register operations third output connected to the second input of the address register, which third input connected to the output of second AND Cl, disadvantage of this device is its low speed. The purpose of the invention is to increase the speed of the device when encoding and editing graphic information. The goal is achieved by introducing a second OR element into the graphic information reading device, one input of which is an input of the device, the other is connected to the output of the coordinate remover, and the output is connected to a pulse generator, and the third element OR connected in series to the decoder, the first trigger, another input of which is connected to the output of the coordinate remover, the second trigger, the other input of which is connected to the decoder, and the output is the second output of the device, and T AND-NO, and the other input of which is connected to the decoder, and Syedin output with another input of the third OR member. FIG. 1 is a block diagram of a device for reading graphic information; in fig. 2 - timing diagrams for the operation of the device. The graphic information reader comprises a tablet 1 with coordinate buses, a switch 2, a first decoder 3, a first counter 4, a first element 5, a second counter b, a first comparison block 7, a first 8, a second 9, a third 10 memory blocks, inverter 11, amplifier 12, puller 13 coordinates, computing unit 14, analog-digital converter 15, first element OR 16, control block 17, pulse generator 18, address register 19, permanent memory node 20, operation register 21, second decoder 22, the second element And 23, the second block 24 comparison, the encoder 25, toggle switch 26, button 27, second element OR 28, first trigger 29, second trigger 30, I-NE element 31 and third element OR 32. The device operates as follows. The information carrier to be encoded is fixedly placed on the plate 1. The encoding process consists in that the operator sets the puller 13 at the selected point and turns on the computer to process the program for generating the input signals of the device. The signals from the computer come through the element OR 28 to the input of the generator 18 pulses and turns it on. The pulse sequence that comes from the output of the generator 18 changes the state of the address register 19, which determines the sequence of selection of micro-commands from the fixed memory node 20, which goes to the operation register 21, the change of state of which is determined by the coordinate measurement algorithm due to the control of certain signals, coming from its outputs on the register 19 addresses.

to element 23 and through the decoder 22 to the control inputs of counter 4, blocks 7-10 and 14, and elements 5. In this case, the state of counter 4 changes, through the decoder 3 and switches 2, the tires of the tablet 1 are sequentially excited the puller 13 coordinates located in the field of the polled tires are mounted by the amplifier 12; When the bus with the corresponding number is excited, the signal induced in the puller 13 coordinates and amplified by the amplifier 12 is stored in the first memory block 8, and when the next bus is excited, the signal from the amplifier 12 through the inverter 11 is stored in the third memory block 10. Signals,. The inputs to the second inputs of memory blocks 8 and 10 determine the sequence of storing the input signals.

Block 24 compares the amplitudes of the voltage signals stored in memory blocks 8 and 10, and the result of the comparison goes to AND 23. At the same time, from the output of the decoder 22, the pulses go to counter 4 and change its state, if not the condition of the amplitude of the signal from the subsequent bus is exceeded. with a signal from the previous bus. If this condition is fulfilled, an accurate measurement of the coordinate located near the next polled tire is made.

First, excite the previous one, and then follow the next bus. The signals of the amplifier 12 of the previous memory bus in block 8 and through the OR element 16 are fed to the analog-to-digital converter 15, the digital code from the output of which goes to the computing unit 14. Then the signals of the amplifier 12 through the inverter 11 from the subsequent bus are stored in memory block 10 these and through the second input of the element OR 16 are transmitted to the analog-to-digital converter 15. The code from the output of which also enters the computing unit 14; the latter calculates the ratio of the codes from the buses with the corresponding numbers.

The signal from the decoder 22, arriving at the second input of block 14, the latter calculates the ratio of codes from the buses with the corresponding numbers, and blocks 7 and 9 convert the resulting ratio of codes into the number of pulses proportional to the exact value of the coordinate, which counts counter b, for which the resulting ratio of codes is sequentially compared with the table of constants stored in memory block 9.

The combination of toggle switches, 26 determines the coordinate measurement resolution and is selected by the operator.

The selected measurement resolution determines the code at the output of the encoder 25. The coordinate codes from counters 4 and b are transmitted through AND 5 elements on the control signal from the eighth output of the decoder 22.

The computer, taken in from output 1 and remembering the information about the coordinates of the position of the puller 13, generates signals to read the coordinates of the puller 13. I

Since the number of signals from a computer greatly exceeds the number of signals from the button, the number

5 points read per unit of time, due to the exception of repeated button presses, which is a very important task when coding complex curves described by a significant number of points, for example, in topographic maps.

When coding topographic information when the operator pushes the button 27 on the Pth output of the device

5, start-end-type signals are formed, the first press is the start, the second is press the end.

Timing diagram of the formation of coordinate signals at the output of the 1st

Q and N is shown in FIG. 2. At the first instant of time, the device and the trigger 29 are reset. At the second moment, the pulses coming from the computer start the device and the coordinate of the read point is formed, which ends at the third time point and at the output the first appears the information that is perceived by the computer. In the fourth moment of time the computer

0 again sends pulses to the device for re-reading the coordinates. When the button is pressed by the 27th operator at the fifth time point, the signal simultaneously with the arrival at the second input

5 of the element OR 28 also enters the input of the trigger 29 and translates it into a single state. At the sixth moment, the time of outputting the next coordinate signal from the output of the decoder 22, the post goes to the input of the trigger 30 and transfers the state of the trigger 29 to it and the output. The start signal appears (which accompanies the information about the coordinate of the read point, written to memory is perceived

 COMPUTER. The return of the first and second triggers to the initial zero state occurs at the seventh and eighth points in time.

Element AND-NOT 31 in the seventh moment

0 time generates a signal that enters through the OR element 32 at the input of the first trigger and returns it to the zero state.

Subsequent start-up of the device on

5 coordinates reading will occur. After the sixth point in time of issuing coordinates from the action of the pressed button. The signal at the output of the N-th appears with each pressing of the button 27.

The introduction of new assemblies and elements, as well as new constructive connections, made it possible to significantly increase the speed of the proposed device.

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Claims (1)

DEVICE FOR READING GRAPHIC INFORMATION according to ed. No. the third OR element, one input of which is connected to the decoder, the first trigger, the other input of which is connected to the output of the coordinate stripper, the second trigger, the other input of which is connected to the decoder, and the output is the second output of the device, and the NAND element is different whose input is connected to a decoder, and an output coupled to another input of the third OR gate. Fig / СО СП ζ © 00>