Bridge circuit formed of two or more resistance strain gauges

Details Bridge circuit formed of two or more resistance strain gauges Bridge circuit formed of two or more resistance strain gauges

1980-04-18

1982-05-18

Ruehl, Charles A.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

73776, 7386263, 7386267, G01B 720, G01L 122

Patent

active

043298788

ABSTRACT:
A bridge circuit consisting of two or more resistance strain gauges is formed on a synthetic layer on which a resistance layer and a metal layer provided for the terminal elements are applied. The corresponding patterns are etched into the metal and into the resistance layer. Balance surfaces consisting of materials with a temperature coefficient different from that of the resistance layer are connected in series to the resistance strain gauges. By changing the resistance of the balance surfaces, the circuit is balanced in terms of symmetry, in terms of the temperature coefficient of the resistance layer, and in terms of the temperature coefficient of the modulus of elasticity of the test object.

REFERENCES:
patent: 2556132 (1951-06-01), Ball
patent: 3134953 (1964-05-01), Eisler
patent: 3230763 (1966-01-01), Frantzis
patent: 3303693 (1967-02-01), Stedman
patent: 3611241 (1971-10-01), Herceg
patent: 3737827 (1973-06-01), Paetow
patent: 4267724 (1981-05-01), Spoor

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