摘要
针对由倾角仪核心模块MEMS加速度计的偏值和标度因数会随时间推移而产生变化,造成倾角仪倾角测量误差变大、准确度降低、对精密标定设备依赖性强的问题,设计一种基于STM32结合椭球拟合算法的倾角仪现场快速标定系统。该系统以STM32单片机为核心处理单元,内嵌椭球拟合算法,修正MEMS加速度计的偏值和标度因数;配合自编程的上位机程序实现对倾角仪的现场快速标定,保证其测量准确度。试验结果表明:该倾角仪现场快速标定系统操作方便,标定后降低测量误差且使测量准确度提高一个量级,具有一定的工程应用价值。
Bias value and scale factor of the accelerometer in the inclinometer core module MEMS will change with time, resulting in increasing errors in the tilt angle measurement, decreasing accuracy and strong dependence of the precision calibration equipment. For this reason, an on-site rapid calibration system of inclinometer based on STM32 combined with ellipsoid fitting algorithm is designed. This system uses STM32 single-chip microcomputer as the core processing unit and embeds with ellipsoid fitting algorithm, so that bias value and scale factor of MEMS accelerometer are revised. Together with the self-programming upper computer, the on-site rapid calibration of the inclinometer is realized, guaranteeing its measurement accuracy.Experimental results show that the on-site rapid calibration system of the inclinometer is easy to operate,measurement errors are reduced after calibrating, and the measurement accuracy is improved by one magnitude, which has certain engineering application value.
作者
张海鹏
李杰
张波
胡陈君
ZHANG Haipeng;LI Jie;ZHANG Bo;HU Chenjun(Key Laboratory of Instrumentation Science&Dynamic Measurement of Ministry of Education,Taiyuan 030051,China;Suzhou Fashion Nano Technology Co.,Ltd.,Suzhou 215123,China)
出处
《中国测试》
CAS
北大核心
2019年第2期94-98,共5页
China Measurement & Test
基金
国家自然科学基金(51575500)
关键词
倾角仪
MEMS传感器
椭球拟合
现场快速标定
单片机
inclinometer
MEMS sensors
ellipsoid fitting
on-site quick calibration
microcontroller
