Capacitive force-measuring system

Details Capacitive force-measuring system Capacitive force-measuring system

1976-01-13

1977-10-04

Gill, James J.

Measuring and testing

Volumetric content measuring

324 61QS, G01L 114

Patent

active

040517217

ABSTRACT:
An applied force whose mangitude is to be measured is caused to change the spacing between a pair of conductive plates. The resulting variation in capacitance between the plates is employed in an RC oscillator circuit so as to produce a frequency that is reciprocally related to the capacitance. A neutralizing circuit serves to cancel the effect of stray capacitance, and a digital counting device converts the oscillator frequency to a scaled number indicating the magnitude of the applied force.

REFERENCES:
patent: 2917300 (1959-12-01), Spiess
patent: 3280628 (1966-10-01), Schloss
patent: 3541849 (1970-11-01), Corbett
patent: 3729991 (1973-05-01), Hardway

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