SU1698993A1 - Method converting voltage into displacement of member and device for its realization - Google Patents

Abstract

The invention relates to automation and can be used to link information sources with actuators. In order to improve the accuracy of conversion by compensating for amplitude changes of electrical signals 14 A motion input in a method of converting voltage to moving an object, based on converting movement to two AC signals, straightening them, generating a reference voltage, generating a first voltage proportional to the difference in voltage signals, moving the object to eliminate the mismatch between the input voltage and the voltage of the object, form a second voltage, proportional to the sum of the rectified signals, form a code proportional to the ratio of the reference voltage to the second voltage, form the voltage of the object position by multiplying the first voltage by the generated code. A device for carrying out the method, comprising a differential sensor 1, a rectifier 2, a generator of 3 sinusoidal signals, a subtractor 4, a differential amplifier 8, a motor 9, an adder 5, a digital-to-analog converter 6 and 7, a comparator 10, a voltage source 11, a generator 12 pulses, reversible counter 13. 2 sec. Of f-ly, 1 ill. (L S o y 00 yu W s

Description

The invention relates to automation and can be used to link information sources with actuators.

The aim of the invention is to improve the accuracy of the conversion by compensating for the amplitude variations of the electrical movement signals.

The drawing shows a block diagram of a device for implementing the method.

The device contains a differential sensor 1, a rectifier 2, a generator of 3 sinusoidal signals, a subtractor 4, an adder 5, digital-to-analog converters (D / A) 6 and 7, a differential amplifier 8, an engine 9, a comparator 10, a source 11 of the reference voltage, a pulse generator 12, reversible counter 13. The input of the device is the bus 14, and the output of the device is connected with the object 15.

rectifier 2 contains diodes 16, 17, transistors 18-21, resistors 22-27, capacitors 28-29.

The device works as follows.

The alternating voltage from the generator 3 is supplied to the bases of transistors 18 and 19, which are half conductive in the generator 3 and their collector currents are proportional to the capacitances Ci and Ca of the differential sensor 1. When the transistors 18 and 19 are closed, capacitors Ci and Ca of differential sensor 1 is discharged through diodes 16 and 17. The collectors of transistors 18 and 19 produce rectified oscillator voltages 3, the amplitude of which is proportional to the corresponding capacitances Ci and Cg of differential sensor 1. Usidin s transistors 20 and 21 rectifying the voltage supplied to rectifying DC converter 2 outputs:

Ui KUCi.U2 KUC2,

where U is the output voltage of the generator 3;

K - transfer coefficient.

At the outputs of the subtractor 4 and the adder 5, the differential and total voltages are formed, respectively:

U4 - KU (CrC2), Us KU (Ci + C2).

In the D / A converter, a voltage U is formed that is proportional to the product of the output voltage Us of the adder 5 and the output code N of the reversible counter 13: U - NKU (Ci-i-C2). In the comparator 10 voltage

U is compared to the reference voltage Uon of the source 11. Depending on the output signal of the comparator 10, the reversing counter 13 is added or subtracted.

generator pulses 12. Equilibrium occurs when the equality NKU (Ci + C2) Uon. Hence, the output code of the reversible counter 13 is proportional to the ratio of the reference voltage to

output voltage adder 5:

N

U

op

KU (Ci 4- C2)

In the D / A converter 6, the output voltage U of the subtractor 4 is multiplied by the output code N of the reversible counter 13 and the resulting voltage

20

U6 iop

Ci-Cr Ci -f C2

differential amplifier 8 is compared with the input voltage. Output voltage of the differential amplifier 8

affects the motor 9, the shaft of which rotates the object 15 and the shaft of the differential sensor 1 to eliminate the mismatch between the input voltage and

equivalent to it moving.

The accuracy of such a converter is not affected by a change in the amplitude and frequency of the generator 3 and a proportional change in the capacitors Ci and C2 of the differential

sensor 1.

Claims (1)

1. Method of voltage conversion. moving an object based on converting the movement into two AC signals, rectifying them, shaping the object's position voltage, forming the reference voltage, generating the first voltage proportional to the difference of the rectified signals, moving the object until the mismatch between the input voltage tension and stress object, characterized in that, in order to increase the accuracy of the conversion, a second voltage is formed in it, proportional to the sum of the rectified signals, a code is proportional to the ratio of the reference voltage to the second voltage, the object voltage is generated by multiplying the first voltage generated code. 2, A device for converting voltage into an object displacement comprising a differential sensor kinematically associated with an object, the first and second outputs of the differential sensor are connected respectively to the first and second rectifier inputs, the third input of which is connected to the output of the sinusoidal signal generator, and the rectifier outputs A mitel is connected to the inputs of a subtractor, a differential amplifier, one input of which is the input of the device, and the output is connected to the input of an engine kinematically connected with the object of transmission. Still, in order to improve the accuracy of the device, an adder, first and second digital-to-analogue converters, a comparator, a voltage source, a pulse generator and a reversible counter are entered into it, the output of the pulse generator is connected to the counting input of a reversible counter, a control input which connects to the comparator output, and the bit outputs are connected to the digital inputs of the first and second digital-to-analog converters, the analog input of the first digital-to-analog converter connected to the output of the subtractor, and the output is connected to another input of the differential amplifier, the analog input of the second digital-to-analog converter is connected to the output of the adder, and the output is connected to one input of the comparator, the other input of which is connected to the output of the source of the reference voltage, the inputs of the adder are connected to the outputs of the rectifier.