Pivoted arm capacitive extensometer

Details Pivoted arm capacitive extensometer Pivoted arm capacitive extensometer

1989-05-08

1990-07-03

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

33789, 73780, G01D 702

Patent

active

049394452

ABSTRACT:
A capacitive extensometer has an extensometer frame formed of a pair of arms having first ends with specimen contacting members and which are connected together about a hinge axis at second remote ends. The specimen contacting members engage the surfaces of a specimen to be tested. A capacitive type sensing arrangement is mounted on the arms, and is used with conventional circuitry for determining arm motion. The sensing members are located to insure adequate output, and can be located to the exterior of the periphery of the extensometer arm assembly. The ability to mount the capacitor sensor appropriately, while obtaining a relatively large output signal enhances the operability of the extensometer.

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patent: 4831738 (1989-05-01), Meline et al.
Holmes, Alan M. C. and Michael C. Dugan, "Clip-On Extensometer", NASA Tech Briefs, pp. 96 and 97, Jan./Feb. 1986.

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