Investigation of Interface Oil Insufficiency in a Strain Gauge Type Pressure Sensor

Strain gauge type pressure sensors are widely used in different branches of industry to measure from very low high (1400 Mpa) values. This article investigates a strain sensor that uses silicon oil within its housing transmit working the external environment sensing plate. An important failure mode arises loss/leakage oil, whereby portion internal volume is replaced by gas, usually air. Coupled nonlinear governing equations have been derived and solved both static dynamical states describe behavior membrane, interface including pockets Nonlinear plate membrane midplane stretching, course gas. The resulting model describes how loss affects performance changes output measurable range.