Stress gauge

Details Stress gauge Stress gauge

1988-05-31

1989-08-29

Noland, Tom

Measuring and testing

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

Specified electrical sensor or system

73784, G01N 118

Patent

active

048605875

ABSTRACT:
This invention is a stress gauge whose components include a piezoresistive sensor embedded in epoxy, a flatjack, and a housing for the sensor and flatjack. The preferred piezoresistive sensor is ytterbium because of its sensitivity to pressures in the range of interest. This arrangement allows the gauge sensing element to be calibrated at the place of measurement. That calibration is provided by a well controlled uniaxial load applied to the gauge to test the gauge response. Upon removal of the applied load, the gauge can continue to measure the stress history of the surrounding medium.

REFERENCES:
patent: 4377185 (1983-03-01), Katz
patent: 4542655 (1985-09-01), Park et al.

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