Circuitry for strain sensitive apparatus

Details Circuitry for strain sensitive apparatus Circuitry for strain sensitive apparatus

1979-02-12

1980-06-03

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73721, 73777, 324DIG1, 324 65R, 338 4, G01L 906

Patent

active

042055563

ABSTRACT:
Strain gauge apparatus comprises two strain sensitive piezoresistors R.sub.r1 and R.sub.t1, two op-amps, three predetermined value resistances, R.sub.a, R.sub.b, and R.sub.c, and voltage source supplying V.sub.dc. Said elements are connected to produce an output signal of the form V.sub.dc (R.sub.c /R.sub.a l ) (R.sub.r1 / R.sub.t1 -R.sub.a /R.sub.b).

REFERENCES:
patent: 3049685 (1960-08-01), Wright, Jr.
patent: 3456226 (1969-07-01), Vick
patent: 3457493 (1969-07-01), Shoemaker et al.
patent: 3572109 (1971-03-01), Yerman
patent: 3641812 (1972-02-01), Vick
patent: 3836796 (1974-09-01), Solomon et al.
patent: 3841150 (1974-10-01), Pearson
patent: 3956927 (1976-05-01), Person

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