SU1522026A1 - Shaft angle sensor - Google Patents

Abstract

The invention relates to measurement technology and can be used in digital automatic control systems. The aim of the invention is to simplify the sensor and increase the reliability, which is achieved by compensating for the parasitic component of the output signals of the angle-phase converter. The values of resistors R1, R2, and R3 of the resistive divider 2 voltage are selected so that when the phase shifts between the output signals of the transducer 1 angle-phase, equal to 0 and 180 °, the voltage at point a is zero, and when the phase shift equals 90 and 270 °, it reaches a maximum. By applying voltage from point a of resistive divider 2 to the second inputs of summing amplifiers 3 and 4, the parasitic components of the output signals of the angle-phase converter 1 are compensated. 1 il.

Description

one

(21) 4306942 / 25-28

(22) 09/21/87

(46) 11/15/89. Bksh. № 42 (72) S.T. Sarkis, V.V. Adamn and A.K. Movsis n

(53) 681.325 (088.8)

(56) High-precision transducers of angular displacements / Under the editorship of A.A.Akh- metzhanov. - M., 1986, p. 73.

(54) SHAFT SENSOR ANGLE SENSOR

(57) The invention relates to measurement technology and can be used in digital automatic control systems. The aim of the invention is to simplify the sensor and increase the reliability, which is achieved by compensating for the parasitic component of the angle-to-phase converter output signals. The values of the resistors R1, K2 and R3 of the resistive divider 2 voltage are chosen so that when the phase shift between the output signals of the converter 1 is the angle, the phase is equal to O and 180, the voltage at the point is equal to zero and 270 °, it reaches a maximum. By supplying a voltage from the point a of resistive divider 2 to the second inputs of summing amplifiers 3 and 4, the parasitic components of the output signals of the transducer 1 angle-phase are compensated. 1 il.

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ABOUT)

The invention relates to measurement technology and can be used in digital automatic control systems.

The purpose of the invention is to simplify the device and increase reliability by compensating for the parasitic component of the output signals of the angle-to-phase converter. .

The drawing shows a diagram of the sensor angle of rotation of the shaft.

The device contains a transducer 1 angle - a phase of an inductive or magnetoelectric type, a resistive divider 2 and apr and two summing amplifiers 3 and 4.

The device works as follows.

Transducer 1 is an angle — the phase is turned off by two electric signals that coincide in frequency, but are out of phase by some angle, depending on the angle of rotation of the shaft. Due to the mutual penetration of electromagnetic fields, which are sources of these two signals, the phase shift between them contains a parasitic component with a period equal to the period of the output signals and the amplitude determined by the coefficients Ml 2 and h21 of the mutual influence of the electromagnetic fields of the first signal on the second ( index 12) and the second signal at the first (index 21).

The values of the resistors P1, P2, RZ of the resistive divider 2 voltage are selected so that when the phase shifts between the output signals of the converter 1 angle - phase, equal to O or ISO, the voltage at point a is zero, and when the phase shift is 90 and 270 reaches a maximum whose modulus is equal to

UBn + Umt. M12 + M21

where Uft, - the amplitude of the output signals of the transducer 1 angle-phase.

Applying a voltage from point c (resistive divider 2 to the second (non-inverting) inputs of summing amplifiers 3 and 4, it is possible to compensate for the parasitic component of both output signals of converter 1

angle - phase. I

The technical advantage of the shaft angle sensor is to replace complex amplifiers with a simple resistive voltage divider, which is much easier to adjust to compensate for the mutual connections between the output signals of the converter.

Claims (1)

Invention Formula Shaft angle sensor, two-channel angle-to-phase converter, two summing amplifiers connected by inverting inputs to the corresponding outputs of the angle-phase converter channels, and a block of transfer amplifiers connected by inputs to the outputs of the angle-phase converter channels, outputs to non-inverting inputs summing amplifiers of opposite channels, differing By the fact that, in order to simplify and increase reliability, the block of transfer amplifiers is made in the form of a lap splitter consisting of three potentiometers, have a common point, connected to the inverting inputs of summing amplifiers, the inputs of the first and second potentiometers are connected respectively to the outputs of the converter angle – phase, the input of the third A potentiometer is designed to be connected to the zero bus sensor.