SU1187203A1 - Device for displaying curves on screen of video monitoring unit - Google Patents

Abstract

A DEVICE TO DISPLAY CURVES ON THE SCREEN OF THE VIDEO CONTROL UNIT containing a pulse generator, the output of which is connected to the first input of the AND element, the second input of which is connected to the output of the trigger trigger, the output of the AND element is connected to the first input of the video monitoring unit, the OR element and the register of parameters of curves that have that, in order to increase the speed of the device, it contains a counter of the current curve abscissa, a quadrant counter, a curve type code decoder, a fixed memory block of the reference code abscissa curves, a block of constant memory of the specific current code of the ordinates of the reference curves, a multiplier of the abscissa of the reference curves and a multiplier of the current code of the ordinate of the reproducible curve, the first input of which is connected to the output of the curve parameters register, and the second input - with the output of the constant specific memory block) the code of the ordinates of the reference curves, the first, second and third inputs of the counter of the current curve abscissa are connected respectively to the AND element stroke, the output of the IL element and the output of the curve parameter register, and the input to the second input control loop, the input of the quadrant counter, the first move of the OR element, the first input of the smart abscissa of the reference curves, the second input of which is connected to the output of the fixed memory block of the specific abscissa of the horizontal curves, the input of which is connected to , the second and the third inputs of the constant ami block

Description

The invention relates to the field of automation and computer technology and can be used to display curves on a CRT screen output from an electronic computer or any other sensors.

The drawing shows a block diagram of a device for displaying curves.

The proposed device contains a register of 1 parameters of curves, trigger 2 start, generator 3 pulses, element 4, element OR 5, video control unit 6, decoder 7 code type curve, counter 8 current, its abscissa is a reproducible curve, counter 9 quadrants, block 10 constant the specific memory of the specific abscissa code of the reference curves, the multiplier 1 1 abscissa of the reference curves, the multiplier 12 of the current ordinate code of the reproducible curve, block 13 of the permanent memory of the specific current ordinate code of the reference curves, bus 14 input information (unit signal trigger 2, code entry signal to register 1, code entry signal to counter 8 through the OR element 5, counter 9 signal to zero — device first input, input data bus 15 (curve type code and parameters of this curve) second device input , output information bus 16 (indication of end of playback of a regular curve) connected to trigger output 2, code signal input 17 in register 1, connected to bus 14, setup signal 18 input to trigger unit 2, connected to bus 14, signal input 19 set to zero trigger 2, subkey Connected to the output of counter 9, input 20 input pulses of element 4 And connected to the output of generator 3, input 21 of the resolving potential of element AND 4 connected to the output of trigger 2, input 22 of the code entry signal to counter 8 through element OR 5 connected to the bus 14, the input 23 of the code entry signal to the counter 8 through the element OR 5 connected to the output of the counter 8, the input 24 of modulation pulses at the input of block 6 connected to the output of the AND 4 element, the bus 25 of the code of the current abscissa value of the reproducible curve connected to the output counter 8, tire 26 code tech limit value of the ordinate of the reproducible curve, connected to the output of the multiplier 12, bus 27 of the code type of the decoder 7, connected to the output of the register 1, input 28 of the counting minus units of the counter 8 connected to the output of the And 4 element, input 29 of the signal parallelly writing the code to the counter 8, connected to the output of the element OR 5, the width 30 of the code of the maximum abscissa value of the reproducible curve (for example, for a circle — a radius code, for an ellipse — a semi-axis code) of a counterConnecting to the input bus 14, plus counting input 32 of the counter-units 9 connected

to the output of the counter 8, the bus of the counter 8, the bus 33 of the code of the maximum abscissa of the reproduced curve, connected to the output of the register 1, the bus 34 of the code of the current

value of the reproducible curve of the multiplier 11, connected to the output of counter 8, the ratio of the maximum value of the abscissa code of the reference curve, usually equal to the code of half the resolution of the screen of the CRT unit 6 horizontally, to the maximum value of the reproducible curve of the abscissa - specific code of the abscissa multiplier 1 1, connected to the output of block 10, the bus 36 of the code for the ratio of the current ordinate of the reference curve to the code of the maximum ordinate of the reference curve is the specific ordinate code of the multiplier 12 connected to The output of block 13, the bus 37 of the code of the maximum value of the ordinate of the reproduced curve of the multiplier 12, is connected to the output

0 register 1, block 38 code of the quadrant number of block 13, connected to the output of counter 9, bus 39 of the abscissa code of the reference curve of block 13, connected to the output of multiplier 11, bus 40 of the enabling potential of the choice of the type of the reference curve in block 13,

connected to the output of the decipheror 7. The device for displaying the curves on the screen of the video monitoring unit works as follows.

Register 1 of the input information strip 15 is entered into the code of the type of the curve to be reproduced on the screen of the cathode-ray tube (CRT) of block 6, and the codes of the parameters of this curve. For example, the code of the circle, the parameter code of the radius of the circle; ellipse code, parameters-codes of ellipse semiaxes. Register impulse 1

 Information from the strip 15 is fed to the input 17 of the register 1 from the input bus 14.

At the unit input 18 of the trigger 2 from the input bus 14 after entering the information in the register 1 receives the impulse installation

Q flip-flop 2 per unit, defining the start of the loop's reproduction cycle. At the same time, this pulse at the input 31 sets the counter 9 to zero, through the element OR 5, the input of which 22 is connected to the bus 14, and the output to the input 29 of the counter 8,

5, counter 8 shows the parameter code of the curve (for a circle, the radius code).

The decoder 7 code curve type on its input bus 27 connected to the output of register 1, on one of the circuits of output 0 of bus 40 connected to the input of block 13, generates an enable potential for a subgroup of codes in block 13 of the entire group of codes corresponding to a discrete dependence the specific code of the ordinate Y from the abscissa code X for the reference curve chosen by decipheror 7. The reference curve is the curve, the parameters of which have the maximum value for a given resolution of the CRT screen of unit 6 vertically and horizontally. The abscissa code X and the quadrant number code are fed to the address inputs of the block, and the information outputs form a specific ordinate code Y corresponding to the abscissa code X and the quadrant number code for the selected curve type, taking into account that block 13 is pre-programmed on the programmer.

In the case of a specific ordinate code, it is assumed that the ratio of the current ordinate of the reference curve to the code of the maximum ordinate of the reference curve.

Installed in the unit trigger 2 allows the passage of the counting units at the counting input 38 of the counter 8 from the output of the generator 3 through the element 4.

Counter 8 calculates the current X coordinate in each quadrant from the maximum value of X to zero. The current value of the X coordinate code comes from the output of counter 8 to input 34 of multiplier 11 and to input 25 of block 6. When counter 8 counts to zero, an overflow pulse at its output increases the state of the counter by one and, through the OR element 5, enters code 8 into counter parameter X of the output curve for the next quadrant. Counter 9 sets in sequence the number of each of the four quadrants within which the curve is currently played.

The multiplier 11, using the ratio code of the radii of the reference and current circles at input 35 and the code of the current coordinate at input 34, forms the code of the current coordinate X of the reference curve.

The code of the current X coordinate on the strip 36 and the code of the quadrant number on the strip 37 forms the equivalent address of the subgroup of the memory block of the reference curve in block 13.

The specific ordinate code Y of the reference curve is fed to the input 38 of the multiplier 12, to the input 39 of which the curve parameter code arrives. At the output of the multiplier 12, the code of the current ordinate Y of the reproduced curve is formed. The multipliers 11 and 12 are matrix asynchronous multipliers.

The current values of the X and Y codes are fed to the inputs 25 and 26 of block 6. The digital-to-analog deflection amplifier transducers and deflecting coils (not shown) included in block 6 set the beam on the CRT screen to the position corresponding to the values of X and Y codes The modulating pulse at input 24 of block 6 from the output of the element I 4 through the modular amplifier is shown), which is part of block 6, illuminates for a time equal to the duration: the modulation pulse formed by the modulation amplifier, the CRT screen point, in ( At the moment, there is a ray. mayor manner on the CRT screen in a () azuets reproducible curve.

Counter 9, having calculated four quadras

overflows. The overflow impulse of the output of counter 9 is a signal that the reproduction cycle of the curve has been started. 3ot

the pulse resets the flip-flop 2, the output signal of which sends the bus over the bus 16

into the central control unit

shown), as a sign of readiness for the regularization of the next curve.

Multi-valued curves, for which a single value of the abscissa corresponds to how many values of the ordinates (for example, cniali), are reproduced sequentially

alternately overlaying single-valued sets of curves that have an individual code

type of curve, one on another. Cycle i) play an unambiguous part with a cry

completely analogous to the cycle of reproducing (, a single-digit curve.

The device can reproduce a very wide class of groups of curves that are polar in the polar system of coordinates or that correspond paratically to the described similarity criterion and encompass practical

almost all the most used je

curves: straight, circle, ellipse, paabol, sinusoid, cosinusoid, cardio lemniscate, conchoid, cycloid, cissowi

W.

Stanfoid, clothoid, hypocycloid (pp. I go), semi-cubic parabola, carcass leaf, Pascal snail, roses (three-, four-eight-petal), logarithmic with Iraral, Archimedean spiral, hyperbolic spiral, parabolic spiral, well “l. Using the coordinates of the reference cree to form coordinates by reproducing a similar curve increases the speed of forming the coordinates, so the formation time of each pair of coordinates is determined by the total speed of the multipliers 11 and 12 and block 13 and depends on the complexity of the shape of the curve in comparison with the step-by-step algorithmic calculation values of pairs of coordinates in digital numerators, especially in digital differentials

Special analyzers, where I use the methods of numerical integration.

Claims (1)

DEVICE FOR DISPLAYING CURVES ON THE VIDEO CONTROL UNIT SCREEN, containing a pulse generator, the output of which is connected to the first input of the And element, the second input of which is connected to the output of the start trigger, the output of the And element is connected to the first input of the video control unit, the OR element and the register of curve parameters, characterized in that that, in order to improve the performance of the device, it contains a counter of the current abscissa of the curve, a quadrant counter, a code decoder of the curve type, a block of constant memory of the specific abscissa code of the reference curves , a block of constant memory of the specific current ordinate code of the reference curves, an abscissa of the reference curve multiplier and a multiplier of the current ordinate of the reproduced curve, the first input of which is connected to the output of the curve parameter register and the second input is connected to the output of the block of the second cissus by and out of 5 blocks, by: For example, the reference coordinates of the current curves, the first and third inputs of the counter of the current ab curve are connected respectively to the element And, the electronic output ILG ment by the curve parameter register, and with the second input of the video-controlled input of the quadrant counter, the first OR element, the first input of the smart abscissa of the reference curves, the second is connected to the output of the memory unit of the specific abscissa about the curves, the input of which is connected to the curve parameter register , the first, and third inputs of the unit of the constant specific current ordinate of the curves are connected respectively to the quadrant counter, with the output of the abscissa of the reference curves abs and the output; a code encoder of the curve type, the input κι is connected to the output of the register of pairs of curves, the input of the quadrant counter, the input of the OR element, the first input p is the parameter curve and the first input is t | start-ups are the first input of the device; the second input of the start-up trigger is connected by a quadrant counter, the output of the current ordinate code in the input curve is connected to the third video control unit, the second input of the curve parameters register is the input of the device. Tora irrepa ystva, with fabulous | SU ,, „1187203