SU1030751A1 - P-sweep code shaper for indicator of circular scanning type - Google Patents

Abstract

FORMER OF RADIAL-ROUND SCAN CODES FOR CIRCLE INDICATOR, containing antenna position angle code sensor, decoder of cosine sign of angle, NOT element, two blocks of controlled inverters, two memory blocks, trigger and sequentially connected generator, clock pulses, element and counter The outputs of the bits of the sensor of the code of the angle of position of the antenna from the first to (n - 2) - and are connected to the corresponding inputs of the first and second blocks of controlled inverters, the outputs of the bits of which are connected respectively to address inputs of the first and second memory blocks, the output (n - 1) -th digit of the antenna position angle code sensor is connected to the first input of the angle cosine sign decoder, the control input of the first block of controlled inverters and through the element NOT. the input of the second unit of controlled inverters, the output of the n-th digit of the antenna angle angle code sensor is connected to the second input of the cosine of the angle sign decoder, and the trigger output is connected to the second input of the AND element, while the trigger input The n-th bit output of the sensor of the angle code of the antenna position and the output of the cosine sign decoder are respectively the output of the sine sign and the output of the sign of the cosine of the driver, characterized in that, in order to improve the formation of the codes, two accumulating signals are inserted. an adder, the outputs of the first and second memory blocks are connected to the corresponding information inputs of the first and second accumulating adders, the output of the And element is connected to the counting inputs of the first and second rolls lev els of adders ZshI and an output connected to the trigger inputs of mounting the counter and the first and second nakaplivshoschih adders, the outputs of which are respectively output codes sine and cosine of the angle position of the scanning beam shaper.

Description

i The invention relates to radio engineering and can be used in round-view KctTopax indices. . It is known Ш1: a fra device for forming a radial-circular sweep on a screen of an electron-beam tube (CRT), containing a generator of clock ig / puls r elements: And, an input unit, a digital sine-cosine generator, a digital oscillator, sawtooth, signals, Decontrol unit, c-1F analog-to-analogue transducers and deviation amplifiers. The known device has low accuracy in the formation of S51 and sine cosine codes. . The closest in technical-validity of the invention is a shaper-radio-focal-cool-second razzertkm codes of the circular view indicator, containing the position yrjja code sensor-antenna angle decoder of the cosine of the angle, element YB; two blocks of controlled inverters, two blocks of memory, a trigger and a successively connected clock generator, an AND element and a counter, with the outputs of the code sensor bits. position angle - ante. n. from the first, across (n - 2) -th are connected to the corresponding inputs of the first and second blocks of controlled inverters, the bit outputs of which are connected respectively to the address inputs of the first and second memory blocks, (n - 1) th bit, the antenna angle angle code sensor is connected to. pervygl. the input of the decrypter of the cosine sign of the angle, the control input of the first control inverter block and through the element NOT with the control input of the second controllable inverter block the output of the nth digit of the angle position sensor of the antenna is connected to the second input the cosine angle sign decanter, and the trigger output is connected to the second input element, the trigger input is the synchronizer input of the generator, and the nth digit output of the antenna angle angle code sensor and the decoder decoder of the angle cosine sign are you: The house of the sine sign and the output of the sign of the cosine of the former 21, However, the use of a stepwise approximation of the reference sine wave in this former is not sufficient to obtain: the accuracy of the formation of the sine and cosine codes. The purpose of the invention is to improve the accuracy of the formation of codes. The goal is achieved by including a radial-circular scan code generator for a circular survey indicator containing an antenna position angle code sensor, an angle cosine sign decoder, a CEE element, two controllable inverter blocks, two memory blocks, a trigger and series-connected clock generator pulse / pulse, element I and a counter, the outputs of the bits of the sensor of the code of the angle of position of the antenna from first to (fi are connected to the corresponding inputs of the first and second blocks of controlled inverters, The output of the (n - 1) -th digit of the sensor of the antenna position angle code is connected to the first input of the decoder of the sign of the angle cosine, controlling the input of the first block of controlled inverters and through element. NOT from the control input of the second unit of controlled inverters, the output of the nth digit of the sensor — the code of the antenna position angle is connected to the second input of the decoder of the cosine of the angle, and the trigger output is connected to the second this is the trigger input. is the synchronizing input of the generator, and the output of the sensor of the angle code of the antenna position and the output of the angle cosine decoder are respectively the output of the sine sign and the output of the cosine of the generator, two accumulating adders are introduced, the outputs of the bits of the first and second memory blocks are connected to corresponding information inputs of the first and second accumulating adders, the output element And is connected to the counting inputs of the first and second accumulating adders,: and the output of the counter is connected, with The setpoints 1 and the inputs of the trigger and the first and second accumulating adders, the outputs of which are respectively the outputs of the sine and cosine codes of the position angle of the scanner beam. The drawing shows a structural electrical circuit of the proposed driver. The former contains a sensor element 1 of the antenna position angle code Element 2, a decoder 3 of the cosine sign of the angle, blocks 4 and 5 of controlled inverters, blocks 6 and 7 of the memory accumulating accumulators 1 and 8 and 9, generator 10 clock pulses, element 11 of the counter 12 and trigger 13, the shaper operates as follows. From the output of the sensor 1, the n-bit binary code of the antenna position angle .cL is received. The bits from the first to the (n - 2) -and code go to blocks 4 and 5 of the controlled inverters, which control the direct or inverted (n 1) -th digit of the code. The most significant nth digit of the antenna position angle code is significant and is used as a sinot sign. . To determine the sign of cos cL in the former, a decoder 3 cosine of the angle is applied, to the input of which two high-order bits of the antenna position angle code are received. The decoder contains two NOT elements, two AND elements and an OR element. The value of the sign ;; ka cosine depending on the values of the signals at the input of the decoder is shown in the table.

From the table it can be seen that the sign cos ai takes the value of the logical O in the second and fourth quadrants and the level of the logical -1 in the second and third quadrants.

The block of controlled inverters serves to form a direct or inverted value of the code of the antenna position angle from O to EO, which provides the shape of the sinoi cosQ code at the outputs of blocks b and 7 of memory within O - 1-80 °. The first to (I-2) th antenna angle code bits come on. The first inputs of blocks 4 and 5 of the controlled inverters, to the second inputs of which (TL-T) is supplied are the discharge or its inverted value, respectively. Inverting (n - 17th bit does NOT 2.

The blocks of controlled inverters operate according to the following logic.

A signal with a logic level of 1, arriving at one input of an element, inverts a signal arriving at another input. If a signal is received at one input by a logic level O, then the value of the signal at the other input passes the output element without changing the level. In accordance with this, a logical O v (n - 1) th code code, coming from the output of sensor 1 to block 4, passes the address of the antenna position angle to the address inputs of the memory block b, and the control signal from the output does NOT 2 provides for the formation of a reverse angle code at the inputs of the memory block 7. When the antenna’s rotation angle is in the second or fourth quadrant, (n -.1) th

the code takes on the value of logical 1, and the reverse angle code arrives at the address inputs of memory block 6, and at the input of block 7, the forward code of the antenna position angle. Memory block 6 Provides storage of sine codes, and memory block 7 stores the cosine of angles from 0 to 90 °. (When the address inputs of blocks b and 7 of memory codes arrive at the output angle of the azimuth antenna, a code is formed at the output of block b sine, and .on the output of block 7 is the cosine code. These codes are fed to the corresponding inputs of accumulating adders 5..8, 9.

The accumulating adders B and 9 are designed to convert the sinoL, cosai values obtained from blocks b and 7 of the memory into a series of elementary increments of the coordinate values, providing the beam of the cathode ray tube (CRT along the CRT radius during scanning).

To generate radial-sweep codes, the device also contains a generator of 10 clock pulses, element 11, counter 12, trigger 13.

The frequency f of the generator 10 clock pulses is determined by the ratio

g - W1 - 1 1C-fO.

. ЗЗщах

where C is the propagation velocity

electromagnetic waves in the wagon stuffy environment;

D. .. - the maximum distance from the distance of the rage on the screen of the circular view indicator;

G, times the sweep duration; m is the number of decomposition elements.

on the sweep radius, m 2 K,,

where k is the counter size 12, is chosen based on various factors: the resolution of the CRT, the diameter of the electron spot, the diameter of the CRT. The start-up pulse arrives at the synchronizing input of the trigger 13 and sets it to one. The signal from the output of the trigger 13 allows the passage of clock pulses from the generator. 10 through the element 11 to the counting inputs of the counter 12 and accumulating adders 8 and 9. Counter 12 provides a pulse for the duration of the sweep. From the outputs of blocks b and 7 of the memory, the values of the sinoL cosoL codes arrive at the information inputs of the accumulating adders 8 and 9. Sri : a radial sweep pulse, coming from the output of the element 11 on the counting inputs of accumulating adders. 8 and 9 sine codes (cosine;

Claims (1)

RADIAL-CIRCUIT SCAN FORMER FOR A CIRCUIT REVIEW INDICATOR, comprising an antenna angle code encoder, an angle cosine sign decoder, an NOT element, two controlled inverters, two memory blocks, a trigger and a serially connected oscillator, clock pulses, an I element and a counter, moreover the outputs of the bits of the sensor of the antenna angle code from the first to (n - 2) th are connected to the corresponding inputs of the first and second blocks of the controlled inverters, the outputs of the bits of which are connected respectively to the address and inputs of the first and second memory blocks, the output of the (n - 1) -th category of the antenna angle code sensor is connected to the first input of the cosine sign decoder, the control input of the first block of controlled inverters and through the element NOT with the control input of the second block of controlled inverters , the output of the ηth discharge of the antenna angle code code sensor is connected to the second input of the cosine sign decoder, and the trigger output is connected to the second input of the And element, while the trigger input 'is the synchronizing input of the driver, and the output η of the nth category of the sensor of the angle code of the antenna position and the output of the cosine sign decoder are respectively the output of the sine sign and the output of the cosine sign of the shaper, distinguished by the fact that, in order to increase the accuracy of generating codes, two accumulating adders are introduced into it, and the outputs of the discharges first; of the first and second memory blocks are connected to the corresponding information inputs of the first and second accumulating adders, the output of the And g element is connected to the counting inputs of the first and second accumulating adders, and the output of the counter is connected to the installation inputs of the trigger and the first and second accumulating adders, the outputs of which are respectively the outputs of the sine and cosine codes of the angle of the beam position of the sweep of the shaper.