Device and method for measuring accelerometer model parameter magnetic vector sensitivity

Abstract

The invention discloses a device and method for measuring accelerometer model parameter magnetic vector sensitivity. The device comprises an acceleration generation module and a magnetic field generation module which are fixedly connected, and the acceleration generation module provides variable and quantifiable acceleration input for an accelerometer; the magnetic field generation module provides a variable and stable magnetic field environment for the accelerometer; when the acceleration generation module is used, the magnetic field generation module has the same pose change as the acceleration generation module, so that the magnetic field environment of the accelerometer to be tested is unchanged when the input acceleration is changed. The space angle relation between the direction of the magnetic vector generated by the magnetic field generation device and the accelerometer test device is kept unchanged, and it is guaranteed that the angle relation between the sensitive axis of the accelerometer and the direction of the magnetic field is unchanged in the detection process; therefore, when the input acceleration along each axis of the accelerometer is changed, the magnetic field environment where each axis of the accelerometer is located is not changed, and the error caused by the change of the accelerometer relative to the magnetic field direction is avoided.

Description

Technical field [0001] The present invention belongs to the field of accelerometer testing, and more particularly to apparatus and method for measuring the sensitivity of the parameter magnetic vector sensitivity of the accelerometer model. Background technique [0002] The accelerometer is a inertial instrument that detects the motion acceleration of the object, which is widely used in inertial navigation guidance, microseismal measurement, precision gravity measurement and other aspects. The magnetic sensitivity of the accelerometer represents the physical quantity of the external environmental magnetic field to the accelerometer, which is used to characterize the influence of unit magnetic field strength on the output of accelerometer, which directly affects the authenticity of the accelerometer detection signal. When the accelerometer is applied, if its magnetic sensitivity is high, the target signal may cause the target signal to be submerged by the output signal caused by t...

AI Technical Summary

Problems solved by technology

[0005] For the defects of the prior art, the present invention provides a method for measuring the magnetic vector sensitivity of the accelerometer model parameters, the purpose of which is to separate the magnetic vector sensitivity of the accelerometer model parameters, aiming to solve the low frequency drift of the accelerometer in the prior art, Factors such as environmental noise and changes in the direction of the geomagnetic field relative to the accelerometer interfere with the test results, resulting in low separation accuracy

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