Displacement transducer

Details Displacement transducer Displacement transducer

1980-10-08

1982-12-07

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

73721, 73727, 7386263, 7386267, G01L 906, G01L 1904

Patent

active

043620604

ABSTRACT:
A displacement transducer for measuring displacement brought about by pressure, strain or the like comprises a sensor for producing an electric signal representative of displacement, an output amplifier for amplifying the signal output from the sensor, an exciting circuit for exciting the sensor with a current or voltage and adapted for controlling excitation in dependence on deviation thereof from a reference value, and a correcting circuit for correcting the excitation of the sensor thereby to correct non-linearity of the output signal from the sensor. The correcting circuit includes a first voltage divider circuitry of a fixed dividing factor and a second voltage divider circuitry of a variable dividing factor connected in parallel with the first divider circuitry. The reference value is corrected by the voltage dividing factor of the second divider circuitry thereby to correct the excitation of the sensor. Correction of the non-linearity of the output signals of negative and positive polarities can be made with only a single correcting circuit.

REFERENCES:
patent: 3350927 (1967-11-01), Senour
patent: 4000643 (1977-01-01), Pearson
patent: 4071823 (1978-01-01), Okayama
patent: 4190796 (1980-02-01), Ishii
patent: 4202218 (1980-05-01), Romo

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