Pressure detecting apparatus

Details Pressure detecting apparatus Pressure detecting apparatus

1984-12-27

1986-06-17

Myracle, Jerry W.

Measuring and testing

With fluid pressure

Dimension, shape, or size

73727, G01B 1312

Patent

active

045948810

ABSTRACT:
A pressure operated detecting apparatus for providing highly sensitive on-off and distance measuring signals. The apparatus comprises an air bridge circuit which includes a semiconductor chip utilizing the piezo-resistance effect. The chip is exposed at opposite sides to a reference air pressure and a subject air pressure which is variable in response to an approaching object. The chip produces an output voltage in response to the difference in pressure which is amplified and converted to an analog signal which is usable for distance measuring. The analog signal is also compared to a reference voltage in a comparator which generates an on-off binary signal.

REFERENCES:
patent: 2707389 (1955-05-01), Fortier
patent: 3477276 (1969-11-01), Fortier
patent: 3490058 (1970-01-01), Fortier
patent: 3863493 (1975-02-01), Busenkell
patent: 4502335 (1985-03-01), Wamstad et al.

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