三轴磁传感器快速标定方法研究  

Research of fast calibration method of three-axis magnetic sensor

作　　者：王庆宾[1] 张晓明 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《中国测试》2017年第7期35-39,共5页China Measurement & Test

摘　　要：针对现有的三轴磁传感器标定过程比较复杂,而且对环境要求较高等问题。提出基于椭球拟合的三轴磁传感器标定方法,利用绕"8"字的方式实现三轴磁传感器快速标定。采用基于最小二乘的椭球拟合方法标定三轴磁传感器的零点误差、灵敏度误差、不正交角误差。建立绕"8"字方式标定准确度的评价指标角度覆盖度,通过实验研究得到角度覆盖度必须达到1.3以上才能得到高准确度的标定参数。通过标定朝向与角度覆盖度综合实验,得到提升标定准确度的绕"8"字操作方法,简化标定过程。Aiming at the complicated calibration process of existing three-axis magnetic sensor and higher requirements for environment, a calibration method of three-axis magnetic sensor based on ellipsoid fitting that used an 8-shaped figure to achieve rapid calibration of three-axis magnetic sensoris was proposed. A calibration experiment was conducted in an 8-shaped figure and three errors, offset and sensitivity and nonorthogonality, were calibrated by using ellipsoid fitting method based on least squares. The angular coverage of the evaluation index around an 8 -shaped calibration precision was established. The experimental results show that the angle coverage must reach 1.3 or above to obtain high accuracy calibration parameters.Through the comprehensive experiment of calibration orientation and angle coverage, the operation method of raising the calibration precision around an 8-shaped is obtained, and the calibration process is simplified.

关 键 词：三轴磁传感器 标定补偿 椭球拟合 绕“8”字 

分 类 号：TS47[农业科学—烟草工业]