Sensor with electrostatic pendular accelerometer and method of controlling such a sensor

摘要

Accelerometric sensor, comprising at least one accelerometer electrostatic pendular having a first electrode and a second fixed electrode, which are fixed to a housing and which are connected to an excitation circuit and a third electrode, which is carried by a pendulum connected to the housing to be movable and which is connected to a detection circuit. The excitation circuit has an output connected to a switch connected to the first and second electrodes, the switch having a first position of the connection and a second position of the connection to be selectively connected to the circuit exciting the first electrode and the second electrode. The detection circuit, the excitation circuit, the switch and the detection circuit are connected to a control circuit arranged so that the first and second electrodes are excited by the train of pulses so as to maintain the pendulum in a reference position and to determine the acceleration undergone by the pendulum. Method of controlling such a sensor.