Piezo-optic measuring transducer and accelerometer, pressure gau

Details Piezo-optic measuring transducer and accelerometer, pressure gau Piezo-optic measuring transducer and accelerometer, pressure gau

1975-05-13

1976-04-20

Gill, James J.

Measuring and testing

Volumetric content measuring

73362R, 73398R, 73517R, 356 33, G01L 124, G01L 900, G01K 518

Patent

active

039509877

ABSTRACT:
A piezo-optic measuring transducer is disclosed herein and an accelerometer, a pressure gauge, a dynamometer, and a thermometer based thereon.
The piezo-optic measuring transducer comprises two polarization-optical channels. Each of these channels includes the following components arranged in series downstream the luminous flux produced by a light source: a polarizer, an elastic element which is common to both channels and sensitive to stress variations therein caused by a variation in the measurand, an analyzer, and a photocell. Both channels are provided with a means for varying the intensity of the luminous flux incident upon one of the photocells which intensity variation is opposite in polarity to that in the luminous flux incident upon the other photocell. Both photocells are arranged in a differential relationship with the difference in the electrical signals produced thereby being representative of the measurand. An accelerometer, a pressure gauge, a dynamometer, and a thermometer can be provided on the basis of said transducer.

REFERENCES:
patent: 3039298 (1962-06-01), Zandman
patent: 3800594 (1974-04-01), Hutchings et al.

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