SU1275234A1 - Moment-of-force transducer - Google Patents

Abstract

The invention relates to a measurement technique and makes it possible to improve the accuracy of operation of a converter. At the output of the amplifier 9, a certain constant voltage is established, which through the trimming resistor 7 is applied to the RC generator 4. The RC generator generates pulses whose duration in the collector circuits of transistors 5 and 6 is the same. The resulting current in the circuit of the millimeter 10, connected to the collectors of transistors 5 and 6, is zero. When the load on the output winding 3 of the magneto-anisotropic sensor 1 appears, the pulses are amplified by the amplifier 9. In the form of a pulsed voltage, these pulses are fed through a resistor 7 to the basic circuits of transistors 5 and 6 of the RC generator 4. As a result of feedback, an asymmetry of pulse durations I in the collector circuits of transistors 5 and 6, the magnitude of which is proportional to W on the force applied to the magnetoanisotropic sensor 1 and determines the proportional increase in the resultant current over the period of oscillations in the circuit mil light meter 10. 2 Il.

Description

Ic

tn

to

GOM

one

The device relates to a measuring technique, and can also find application as an element of automatic control systems, for example, in automated electric drives.

The purpose of the invention is to improve accuracy.

FIG. 1 shows the block diagram of the power-torque converter in FIG. 2 - graphs of signals n: on converter elements.

The torque converter contains a magnetoanisotropic sensor 1 with input 2 and output 3 windings, a symmetrical RC generator 4 with two bpolar transistors 5 and 6, between bases of which a trimmer 7j includes a power amplifier 8, the input of which is connected to collectors of bipolar transistors 5 and 6 and the output is connected to the input winding 2 of the magnetoanisotropic sensor 1, to the output winding 3 of which an amplifier 9 is connected, the output of which is connected to the midpoint of the trimming resistor 7.

The torque converter works as follows.

Symmetric RC generator 4 generates pulses, which through the amplifier 8 power is fed to. the input winding 2 of the magnetic anisotropic sensor 1.

In the absence of a load, the signal on the output winding 3 of the magnetically anisotropic sensor 1 is zero. At the same time, in the code of the amplifier 9, a certain constant voltage Yc (Fig. 2) J is established, which through the trimming resistor 7 is applied to the base circuits of the symmetrical QC generator 4, as a result of which the latter generates pulses of T and T in the collector circuits of transistors 5 and 6 are the same and the resultant

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the current for the period of oscillation in the milliammeter circuit 10, connected to the collectors of transistors 5 and 6, is zero. In the presence of a load output winding 3 of a 1 pb magnetically anisotropic sensor, pulses are amplified by amplifier 9 and in the form of a pulsed voltage (Fig. 2) are supplied through a trimming resistor

7 on the basic circuit of transistors 5 and 6 of a symmetrical KC-generator. In this case, due to the presence of additional feedback, an asymmetry of the durations T and Tj of the pulses occurs in the collector circuits of the transistors 5 and 6.

The value of asymmetry is proportional to the force applied to the magnetoanisotropic sensor 1 and determines the proportional increase in the resultant current over a period of oscillation in the circuit of a milliammeter 10 connected to the collectors of transistors 5 and 6.

Claims (1)

Invention Formula Force-torque converter containing magnetoanisotropic sensor with two windings, a trimming resistor and a square-wave pulse generator, including two bipolar transistors, a collector of one of which is associated with the beginning of one sensor winding, is distinguished by the fact that, in order to increase accuracy, An amplifier is inserted into it, the input of which is connected to another sensor winding, and the output to the midpoint of the trimmer is connected between the bases of the generator transistors, which is made in the form of a symmetric RC generator, with the end of one sensor winding connected to the collector of the other transistor. Ttizt eight V B W / xoff V I with Fi. f