DUAL PICK-OFF ELECTRONIC CIRCUITRY FOR LINEAR SERVO ACCELEROMETER

摘要

Dual pick-off electronic circuitry for linear servo accelerometer of the type having an unbalanced mass in the form of a conducting element. First and second pick-off coils disposed on opposite sides of the conducting element. First and second oscillators are connected to the first and second pick-off coils in such a manner that the first pick-off coil forms a part of the tank circuit of the first oscillator and the second pick-off coil forms a part of the tank circuit of the second oscillator. Means is provided for interconnecting the first and second oscillators so that the first and second oscillators operate in synchronism at substantially identical frequencies. Means is provided for rectifying the outputs of the first and second oscillators and a differential amplifier having dual input and dual output is utilized for receiving the rectified signals. A.C. feedback means is provided for controlling the open loop gain and also for providing temperature stabilization. Means is provided for converting the double ended output of the differential amplifier to a single ended output for driving a torque coil which is connected to the conducting element to oppose the forces of acceleration on the conducting element.