Force detector using resistance elements

Details Force detector using resistance elements Force detector using resistance elements

1990-01-25

1991-07-30

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to multiple loads or load components

7386267, 338005, G01L 516, G01L 122

Patent

active

050351486

ABSTRACT:
A force detector for detecting forces exerted in axial directions or moments exerted about respective axes uses an origin as a working point in an XYZ three-axis coordinate system. Four bridge circuit portions on the upper surface of a substrate have resistance elements along positive and negative directions of the X and Y axes. The resistance elements have a property such that their electric resistances vary due to a mechanical deformation, and detection of a force is made by voltage variations so produced in the bridge circuits of the bridge circuit portions. A strain generative body is used in order to transmit an external force to the substrate. The strain generative body has a first flexible portion having a sufficient flexibility with respect to the Z axis direction and a second flexible portion having sufficient flexibility with respect to the directions perpendicular to the Z axis, thus permitting detection sensitivities with respect to each axis to be made uniform.

REFERENCES:
patent: 4454771 (1984-06-01), Shimazoe et al.
patent: 4812199 (1989-03-01), Sickafus
patent: 4884051 (1989-11-01), Takahashi et al.
patent: 4905523 (1990-03-01), Okada

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