SU911719A1

SU911719A1 - Functional angle-to-code converter

Info

Publication number: SU911719A1
Application number: SU802898407A
Authority: SU
Inventors: Евгений Петрович Зиновьев; Борис Михайлович Спиро; Геннадий Владимирович Федотов
Original assignee: Предприятие П/Я В-8624
Priority date: 1980-03-24
Filing date: 1980-03-24
Publication date: 1982-03-07

Description

(54) ФУНКЦИОНАЛЬНЫЙ ПРЕОБРАЗОВАТЕЛЬ УГОЛ-КОД(54) FUNCTIONAL TRANSLATOR ANGLE-CODE

Устройство относитс к автоматике и вычислительной технике и предназна- чено дл преобразовани .сигнала переменного тока - функции угла поворота вала - в код, пропорциональный этой функции, и может найти применение в счетно-решающих приборах, в частности, в приборах, использующих эффект Доплера, при преобра овани х сигналов дл измерени скорости и угла дрейфа судна.The device relates to automation and computing technology and is intended to convert an alternating current signal — a function of the angle of rotation of the shaft — into a code proportional to this function, and can be used in calculating devices, in particular, in devices using the Doppler effect, when converting signals to measure vessel speed and drift angle.

Известен преобразователь угол-код, который содержит сннусно-косинусный вращающийс трансформатор, нуль-орга-. ны, триггеры, схемы совпадений, генератор импульсов, двухполюсный электронный переключатель и счетчик 1.The angle-code converter is known, which contains a sno-cosine rotating transformer, a zero-org. triggers, coincidence circuits, pulse generator, two-pole electronic switch and counter 1.

Недостатком преобразовател вл етс поочередное (потактовое) заполнение счетчика с последующим сбросом, т. е. скачкообразное по вление информации, недопустимое в автоматических системах управлени при работе с быстромен ющимис процессами .The disadvantage of the converter is the sequential (sequential) filling of the counter with the subsequent reset, i.e., a jump-like appearance of information that is unacceptable in automatic control systems when working with fast-changing processes.

Известен функциональный преобразователь , который содержит генератор Тактовой частоты, реверсивный q4eTчик , цифроаналоговый преобразователь.Known functional Converter, which contains the generator clock frequency, reversible q4eTchik, digital-to-analog converter.

элемен сравнени , усилитель и компаратор 2 .comparison element, amplifier and comparator 2.

Недостатком этого устройства вл етс низка точность преобразовател .A disadvantage of this device is the low accuracy of the converter.

Цель изобретений - повьоиение точности .The aim of the inventions is to improve accuracy.

Поставленна цель достигаетс тем, что функциональный преобразователь угол-код, содержащий элемент сравнени , один из :входов которого соединен с выходом цифроаналогового преобразовател , а выход - с входом первого усилител , компаратор, вы15 ход которого соединен с одним из входов реверсивного счетчика, другой вход которого присоединен к генератору, а выход - к одному из входов цифроаналогового преобразова20 тел , снабжен вторым усилителем, вторым компаратором, функциональным датчиком, первым и вторым дискриминаторами , причем ыход функционального датчика соединен с вторым входом The goal is achieved by the fact that a functional angle-code converter containing a comparison element, one of: whose inputs are connected to the output of a digital-to-analog converter, and the output to the input of the first amplifier, a comparator, the output of which is connected to one of the inputs of the reversible counter, another input which is connected to the generator, and the output - to one of the inputs of the digital-analogue conversion of the bodies; it is equipped with a second amplifier, a second comparator, a functional sensor, the first and second discriminators, with output ktsionalny sensor connected to the second input

25 элемента сравнени и через второй усилитель с одним из входов второго дискриминатора, выход первого усилител через первый дискриминатор соединен с входом первого компаратора, 25 of the comparison element and through the second amplifier with one of the inputs of the second discriminator, the output of the first amplifier through the first discriminator is connected to the input of the first comparator,

Claims

30 inputs of the functional sensor, the second inputs of the first and second discriminators and the digital-to-analog converter are connected, the output of the second discriminator through a comparator connecting to the third input of the reversible counter. The drawing shows the structures on the functional angle-code converter. The angle-code functional converter contains a functional sensor ,, element 2 cf 1, 1 if bank-to-analog converter 3, first amplifier 4, first discriminator 5, first comparator 6, reversible counter 7 ,. generator 8, second amplifier 9, second discriminator 10 and second, comparator 11. The device operates in the following manner. From the output of functional sensor 1, a signal, functionally proportional to the angle of rotation of the sensor, is fed to the first input of element 2 cpaBHisHHR, to the second input of which an AC signal is received, which is proportional to the code value on the bit inputs of the D / A converter. The difference of signals at the output of comparison 2 is the first amplifier. It goes to the first input of the first discriminator 5, the second input of which receives the reference voltage, the outputs of the discriminator 5 through the first comparator b are connected to the first and BTOI% IM inputs of the reversible counter 7 in such a way that, depending on the control signal present on the first or second input in the meter, the value of the code of the clock signal of the generator 8 pulses is filled in or written off until the value of the output digital The second converter 3 input to the second input of the comparison element 2 does not compare with the value of the output voltage of the functional sensor 1; the input of the first input of the comparison element 2 sets the value of the code 7 proportional to the angle of rotation of the functional sensor 1, To convert the code to the AC voltage, the converter 3 receives the same reference voltage, which is discriminator 5 and the functional sensor 1, a synchronous change of the reference voltage zggih input devices avoids the effect of this variation. To isolate the code sign, the signal from the output of functional sensor 1 through the second amplifier 9, the second disperser 10 and the second comparator 11 is fed to the input of the reversible counter 7. Depending on the ratio of the phase voltage at the output of the functional sensor 1 and the voltage of the support at the second input the discriminator 10 at the output of the comparator 11 by a Wits corresponding signal (for example, well, the Lev level corresponds to a phase shift equal to 0, the unit level phase shift equal to 180 °), while the most significant bit of the output code of the reversible counter 7 L is significant discharge. The use of a constant device allows, in comparison with limestone, to improve the accuracy of converting an alternating current signal — a function of the shaft rotation angle — into a code (binary, binary-decimal) proportional to this function, obtain the sign of the output code, eliminate the effect of voltage fluctuations (reference voltage) by performing an amplifier and a digital-to-analog converter using alternating current and introducing into the device a second amplifier of alternating current, a second comparator, a functional sensor and two discrimination Hur. . Claim of the invention. Functional angle-code converter containing a comparison element, one of the inputs of which is connected to the output of a digital-analog converter, and the output with the input of the first amplifier, a comparator, the output of which is connected to one of the 14 inputs of the reversible counter, the other input of which is connected to the generator and the output is to one of the inputs of a digital-to-analog converter, characterized in that, in order to improve its accuracy, it is equipped with a second amplifier, a second amplifier, a function sensor, a second one and skriminatorami. Moreover, the output of the functional sensor is connected to the second input of the reference element and through: the second amplifier with one of the inputs of the second discriminator, the output of the first amplifier through the first discriminator connected to the input of the first comparator, the input of the functional sensor, the inputs of the first and second discriminato. The ditch and the D / A converter are connected, the output of the second discriminator is connected via a comparator to the third input of the reversible counter. Sources of information taken into account in the examination 1. The author's certificate of the USSR, cl. G 08 C 9/04,.

2.Balakai V.G. and others. -Integrshnye scheme of the ADC and DAC Oskva. Energy 1978, pp. 49 - 52