Vibrating beam force transducer with automatic adjustment of its

Details Vibrating beam force transducer with automatic adjustment of its Vibrating beam force transducer with automatic adjustment of its

1993-06-07

1994-08-23

Chilcot, Jr., Richard E.

Measuring and testing

Dynamometers

Responsive to force

73862623, G01L 100

Patent

active

053396987

ABSTRACT:
A vibrating beam force transducer is comprised of an oscillating sensing element having a frequency output indicative of the force applied to the sensing element. The sensing element has a variable electrical resistance which can vary in accordance with temperature fluctuations over the operating range of the transducer.
A drive circuit is electrically coupled to the sensing element for causing the sensing element to oscillate at a resonant frequency that is a function of the force applied to the sensing element. The drive circuit includes a source of DC voltage, which is utilized for altering the electrical characteristics of the drive circuit in response to variations in the electrical resistance of the sensing element.

REFERENCES:
patent: 4155257 (1979-05-01), Wittke
patent: 4372173 (1983-02-01), EerNisse et al.
patent: 4912990 (1990-04-01), Norling
patent: 5142913 (1992-09-01), Delatorre

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