Stress gauge
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United States of America Patent
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Aug 29, 1989
Grant Date -
N/A
app pub date -
May 31, 1988
filing date -
May 31, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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