Full-automatic correction system for acceleration sensor

Abstract

The invention discloses a full-automatic correction system for an acceleration sensor. The system comprises an accurate temperature-control device, an angle signal measurement module, a temperature measurement module, an acceleration measurement module, a drive module and a central processing unit (CPU), wherein the CPU is connected with the accurate temperature-control device, the angle signal measurement module, the temperature measurement module, the acceleration measurement module and the drive module; and the CPU calculates the offset value of a g value to be corrected corresponding to the acceleration sensor and the standard g value under each standard g value at different temperatures, and calculates a corresponding curve of the offset value and temperature, performs polynomial fitting on the curve, resolves the coefficients of quaternion linear equation, and writes the coefficient values into the memory of the acceleration sensor for correction. The system can automatically correct the acceleration sensor, removes the problems of null drift and temperature drift, and improves the measurement accuracy of the acceleration sensor.

Description

[technical field] [0001] The invention relates to a fully automatic calibration system of an acceleration sensor. [Background technique] [0002] Generally, MEMS-based acceleration sensors have zero drift and temperature drift problems, which seriously affect the measured value of the sensor; if the high-precision measured value of the acceleration sensor is required, the acceleration sensor must be calibrated. Due to the small size of the acceleration sensor, the manual calibration procedure is cumbersome, and batch operation cannot be realized. [Content of the invention] [0003] The present invention overcomes the shortcomings of the above technologies and provides a fully automatic calibration system for acceleration sensors. The system can automatically correct the acceleration sensors, eliminate the problems of zero drift and temperature drift, and improve the measurement accuracy of the acceleration sensors. [0004] To achieve the above object, the present inventi...

AI Technical Summary

Problems solved by technology

[0002] Generally, MEMS-based acceleration sensors have zero drift and temperature drift problems, which seriously affect the measured value of the sensor; if the high-precision measured value of the acceleration sensor is required, the acceleration sensor must be calibrated

Due to the small size of the acceleration sensor, the manual calibration procedure is cumbersome, and batch operation cannot be realized

Images