COMPENSATED OUTPUT SOLID-STATE DIFFERENTIAL ACCELEROMETER

摘要

A solid-state differential accelerometer employing piezotransistors for measuring acceleration or velocity of a body along a specified axis of the accelerometer. A pair of substantially identical piezotransistors are arranged back-to-back along the axis through which tension and compression forces of acceleration are applied. A piezoelectrical emitter-base junction of each transistor is mechanically linked to a diaphragm portion of the transistor case that is normal to the acceleration axis. A force transferring bar links the outer surface of the transistor case diaphragm with a pliable surface of a nickel alloy protective housing of each transistor, the bar being aligned along the acceleration or force axis. The pliable housing surfaces are held together by a support ring and maintain the physical arrangement of the transistors back-to-back. A change in velocity along the force axis causes an opposing reaction by the pliable surfaces which convey changes through the force transferring bar to flex the piezotransistor diaphragms, stressing the emitter-base junction of each transistor.