Electricity: power supply or regulation systems – Remote sensing
Patent
1978-02-16
1980-04-01
Pellinen, A. D.
Electricity: power supply or regulation systems
Remote sensing
73726, 323 75B, G01L 122, G01K 720
Patent
active
041963822
ABSTRACT:
A physical quantities transducer compensation circuit is provided with at least two compensating bridge circuits. The first of these circuits consists of resistors and a first potentiometer and thermistors where the control element, preferably a second potentiometer is connected via the diagonal of this bridge supplied by the voltage drop across a resistor connected in series into the current circuit of a strain gauge. The current circuit of the second strain gauge includes a zeroing circuit consisting of resistors and a third potentiometer. The second compensating bridge is built of resistors and thermistators, and a fourth potentiometer is connected over the diagonal of the bridge. This bridge is supplied with the differential voltage of a Zener diode having a resistor and a diode supplied with the bridge current. The current source is located on the transistors and the resistor being controlled by voltage between the slide of a fourth potentiometer and the common point, to which diode and resistor are connected. Supply current sources of the strain gauges and the output signal is taken from slides of a second and third potentiometers.
REFERENCES:
patent: 3188553 (1965-06-01), Eurenius
patent: 3278834 (1966-10-01), Perino
patent: 3495159 (1970-02-01), Smith
patent: 3887864 (1975-06-01), Knudsen
Pellinen A. D.
Predsiqbiorstwo Auttomatyki Przemyslowej "Mera-Pnefal"
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