SU958981A1

SU958981A1 - Stroboscopic compensating signal converter

Info

Publication number: SU958981A1
Application number: SU802988308A
Authority: SU
Inventors: Александр Абу-Бакарович Ахмадов; Владимир Александрович Жуковский; Елизар Саркович Левин
Original assignee: Украинский Центр Стандартизации И Метрологии
Priority date: 1980-10-03
Filing date: 1980-10-03
Publication date: 1982-09-15

Description

Изобретение ОТНОСИТСЯ к измерительной технике.The invention relates to measurement technology.

Известен стробоскопический компенсационный преобразователь, содержащий .амплитудный дискриминатор, ключевой усилитель, интегратор, генератор тока, схему сброса I.Known stroboscopic compensation converter containing .amplitude discriminator, key amplifier, integrator, current generator, reset circuit I.

Недостатком данного преобразовател вл етс мала точность.The disadvantage of this converter is low accuracy.

Наиболее близким к предлагаемому вл етс преобразователь, содержащий амплитудный дискриминатор, вход которого соединен с входной шиной а выход подключен к входу амплитуДно-временнЬго преобразовател , выход которого соединен с вход;ом ин-. тегратора и блока управлени ., выходы которого соединены с амплитудньм дискриминатором и .с входом интегратора , другие входы.которого соеди-г йены с выходами амплит.удно-временного преобразовател -.и формировател опорного сигнала 2.The closest to the present invention is a converter containing an amplitude discriminator, the input of which is connected to the input bus and the output is connected to the input of the amplitude of the time-to-single converter, the output of which is connected to the input; a tegrator and a control unit. whose outputs are connected to an amplitude discriminator and an integrator input, other inputs of which are connected to the outputs of the amplitude converter and the reference signal generator 2.

, Недостатком данного преобразовател вл етс нелинейность характеристики .. The disadvantage of this converter is the non-linearity of the characteristic.

Цель изобретени - увеличение линейности характеристики.The purpose of the invention is to increase the linearity of the characteristic.

Поставленна цель достигаетс тем, что в преобразователь, содержащий амплитудный дискриминатор,вход которого соединен с входной шиной, ключ, выходы которого соединены с входами интегратора, и блок управлени , введены оптрон, генератор строб-импульсов и элемент задержки, вход которого соединен с входом управлени .ключа и выходом генератора строб-импульсов, второй в-ыход The goal is achieved by the fact that an optocoupler, a strobe pulse generator and a delay element, the input of which is connected to the control input, are entered into the converter containing the amplitude discriminator whose input is connected to the input bus, the key whose outputs are connected to the inputs of the integrator, and the control unit Key and generator output strobe pulses, the second in-out

.10 которого подключен к второму входу амплитудного, дискриминатора, выход элемента задержки соединен с первым ВХОДОМ:блока управлени , второй вход которого;соединен с выходом интег15 ратора, причем выxoJE(ы оптрона соединены со входами ключа, а входы под- ключены к выходам амплитудного дискриминатора и .блока управлени ..10 which is connected to the second amplitude input discriminator, the output of the delay element is connected to the first INPUT: control unit, the second input of which is connected to the output of the integrator, and its output (the optocoupler is connected to the key inputs, and the inputs are connected to the amplitude outputs discriminator and control unit.

На чертеже приведена схема опи20 сываемого преобразовател .The drawing shows a diagram of the transducer to be described.

Преобразователь .содержит амплитудный дискриминатор 1, состо щий из резисторов 2 и 3, тунельногр диода 4 и конденсатора 5, генератор The converter contains an amplitude discriminator 1, consisting of resistors 2 and 3, a tunnel diode 4 and a capacitor 5, a generator

25 6 сТроб-импульсов, оптрон 7, к.люч 8, элемент 9 задержки, интегратор 10 и блок 11 управлени . Входной сигнал, подан на входную шину 1.2. . 25 6 sTrob pulses, optocoupler 7, key 8, delay element 9, integrator 10 and control block 11. The input signal is fed to the input bus 1.2. .

Принцип работы преобразовател The principle of operation of the converter

Claims

30 is as follows. . In the initial state, the tunnel diode 4 is in a low voltage state, oriently, the LED of the optocoupler 7 is in the lit state. If, at the time of arrival, the strobe impulses of currents due to the input voltage, voltage, strobe pulse and the voltage from block 11 exceed the peak current of diode 4, then it goes to the high-voltage state and the LED turns off. In this case, a pulse of normalized duration and amplitude is sent to the subtracting input of the integrator 10 from the output of the generator b, which leads to a decrease in the voltage at the integrator's output, and hence the compensation signal at the output of block 11. If indicated, the sum of the currents with the arrival of the strobe pulse is less the peak current of diode 4, it is in the low voltage state, the LED of the opto-switch 7 is closed. In this case, the normalized signal from the generator b input through the switch 8 is fed to the integrator input, which leads to an increase in the voltage at the integrator output, as well as to an increase in the signal at the output of block 11, the signal from the output of element 9 through block 11 causes the diode 4 to its initial state the Thus, in steady state, the voltage at the integrator output turns out to be proportional to the instantaneous value of the voltage of the signal under study. The converter has an increased linearity of the conversion characteristic due to a decrease in the parasitic capacitance of the discriminator, due to galvanic isolation: with circuits forming a compensation signal. Claims of the invention, the stroboscopic capacitance signal converter containing the amplitude discriminator whose input is connected to the input bus, the key whose outputs are connected to the inputs of the integrator, and the control unit, which is used in order to increase the linearity of the characteristic, in neg o optocoupler, strobe pulse generator; and a delay element, the input of which is connected to the key control input and the output of the strobe pulse generator, the second output of which is connected to the second input of the amplitude discriminator, the input of the delay element connected to the first input of the control unit, the second input of which is connected to the integrator output, and the optocoupler outputs are connected With the key inputs, and the inputs are connected to the outputs of the amplitude discriminator and control unit. Sources of information taken into account during the examination 1. USSR author's certificate No. 236628, cl. G 01 R 19/04, 14.02.67.

2. Authors certificate of the USSR 617739, cl. G 01 R 19/04,27.12.76.