G - Physics – 01 – R
Patent
G - Physics
01
R
324/59
G01R 17/02 (2006.01) G01D 3/036 (2006.01) G01L 1/22 (2006.01)
Patent
CA 1085929
Abstract of the Disclosure A temperature compensation circuit for a transducer is provided with at least two compensating bridge circuits. The first of these circuits consists of resistors and a potentiometer and thermistors in the arms of the bridge and a control element, preferably a potentiometer, connected across the diagonal of this bridge. The bridge is supplied by the voltage drop across a resistor connected in series in the current circuit of a first transducer, for example a strain gauge. The current circuit of a second strain gauge includes a zeroing circuit consisting of resistors and a potentiometer. The second compensating bridge consists of resistors, ther- mistors and a potentiometer in the arms of the bridge and a control element, preferably a potentiometer connected across the diagonal of the bridge. This bridge is supplied with the differential voltage of a Zener diode serially connected to a resistor and a diode across power input terminals. A current source comprising transistors and a resistor is controlled by the output of the control element of the second bridge and supplying current to the current circuits of both transducers. The output signal is taken from the slider of the potentiometer control element of the first bridge circuit and the slider of the potentiometer of the zeroing circuit.
297207
Fetherstonhaugh & Co.
Przedsiebiorstwo Automatyki Przemyslowej "mera- Pnefal"
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