Capacitative weight sensor

Details Capacitative weight sensor Capacitative weight sensor

1989-03-30

1991-01-08

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

177210C, H01G 700, G01G 314

Patent

active

049841289

ABSTRACT:
A load sensor which has an elongate hollow body 11, preferably formed as a metal extrusion, and which forms a first capacitative plate 21. A second parallel capacitative plate 15 is formed on an insulating body which is held in place relative to the extrusion by a resilient support 16. Application of a load to the extrusion causes variation in the gap between the plates of the capacitor, thus affecting the capacitance in a manner which is measured and processed to provide an output signal which is directly proportional to the applied load.

REFERENCES:
patent: 3678378 (1972-07-01), Trott et al.
patent: 3782486 (1974-01-01), Kuhn et al.
patent: 3838684 (1974-10-01), Manuel et al.
patent: 3952234 (1976-04-01), Birchall
patent: 4198670 (1980-04-01), Mann
2244 Research Disclosure, No. 277, dated May 1987, New York, N.Y., p. 316.
The Capacitive Strip Sensor.

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