Isotropic strain sensor and load cell employing same

Details Isotropic strain sensor and load cell employing same Isotropic strain sensor and load cell employing same

1983-12-27

1986-06-24

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

73781, 338 5, G01L 122, G01B 718

Patent

active

045961557

ABSTRACT:
An isotropic strain sensor having four mounting points interconnected by four legs, two of which are bowed toward each other and two of which are bowed away from each other. A strain sensing element mounted on at least one of the legs provides an electrical indication of the deflection of the leg. As a result, the strain sensor measures isotropic strains in an object to which the strain sensor is attached through the mounting points. Another embodiment of the strain sensor utilizes three mounting points interconnected by legs, two of which are bowed outwardly and one of which is bowed inwardly. Both embodiments of the strain sensor produce outputs that are a nonlinear function of the sensed isotropic strain. This nonlinear characteristic allows the strain sensor to provide an output that is a linear function of the load applied between the center and outer periphery of a freely supported disc that has a strain that is a nonlinear function of the applied load.

REFERENCES:
patent: 3341794 (1967-09-01), Stedman
patent: 3698495 (1972-10-01), Vogt
patent: 3706349 (1972-12-01), Paelian et al.
patent: 3995476 (1976-12-01), Hoffman

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