A method for stabilizing an accelerometer

Abstract

The invention discloses a method for stabilizing an accelerometer. The method comprises the following steps of: installing the accelerometer on an accelerometer installing fixture at a +1g (or-1g) position, putting the fixture in a demagnetizing coil, controlling a test circuit by a computer control system to electrify the accelerometer, recording the output of the accelerometer, and controlling an alternating-current voltage regulator through the computer control system to gradually increase the output of an alternating-current voltage, namely gradually increasing the intensity of the alternating-current magnetic field in the demagnetizing coil; and when the output of the accelerometer is increased to a predetermined value, automatically controlling the alternating-current voltage regulator by the computer control system to stop working, and completing stabilization. By using the method, the accelerometer can be accurately, conveniently and quickly stabilized in a computer control mode, the stability of accelerometer scale factors is improved, and the rejection rate is reduced.

Description

technical field [0001] The invention relates to a method for stabilizing an accelerometer, in particular to a method for stabilizing a quartz flexible accelerometer. Background technique [0002] The quartz flex accelerometer is a force balance accelerometer designed to measure constant and low frequency accelerations acting along its input axis. The quartz flexible accelerometer is composed of two parts: the meter head and the servo circuit. The schematic diagram of its composition structure and working circuit connection is as follows: figure 1 shown. The meter head mainly consists of a differential capacitance sensor 1, a detection mass pendulum 2, an electromagnetic torquer 3, and a flexible flat bridge 4, wherein the electromagnetic torquer 3 contains a permanent magnet 6 for generating a magnetic field. When there is an acceleration a along the input axis of the accelerometer, the pendulum plate 2 deflects slightly, and the capacitance value of the differential capac...

AI Technical Summary

Problems solved by technology

However, the magnetic field generated by manually rotating the knob of the AC voltage regulator is not very accurate, and it depends entirely on the operator's experience. Moreover, different accelerometers have different responses to the applied magnetic field. Often, the magnetic field is too large or too small, which will affect the The stability of the accelerometer scale factor will be adversely affected, even resulting in defective products

Moreover, the efficiency of manual processing is also low, which is not conducive to batch production.

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