Vibrating beam force transducer with automatic drive control

Details Vibrating beam force transducer with automatic drive control Vibrating beam force transducer with automatic drive control

1993-06-07

1995-05-23

Chilcot, Jr., Richard E.

Measuring and testing

Dynamometers

Responsive to force

7386241, G01L 100

Patent

active

054171202

ABSTRACT:
A vibrating beam force transducer is comprised of an oscillating sensing element having an output frequency 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 utilizes an AC drive signal source that is electrically coupled to the sensing element to drive the sensing element at its resonant frequency which is a function of the force applied to the sensing element. The drive circuit has a DC compensation circuit that alters 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
patent: 4912990 (1990-04-01), Norling
patent: 5142913 (1992-09-01), Delatorre

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