一种迟滞时间差型磁通门检测方法  

A Method for Residence Times Difference Fluxgate Detection

作　　者：孙晓燕[1] 刘诗斌[1] 刘仕伟[1] 

机构地区：[1]西北工业大学电子信息学院,西安710072

出　　处：《传感技术学报》2013年第9期1202-1205,共4页Chinese Journal of Sensors and Actuators

基　　金：国家自然基金项目(60874101);西北工业大学基础研究基金项目(W018104)

摘　　要：针对现有的迟滞时间差型磁通门传感器检测方法的不足,提出了一种对磁通门数字信号进行曲线拟合,检测峰值点对应的时间来计算迟滞时间差的方法。利用实验室自制的迟滞时间差型磁通门传感器对本文提出的方法进行测试,结果显示传感器在±10×104nT范围内线性度误差为±0.002 6%,灵敏度为8.5 ns/nT,多次测量子样标准差不大于0.05。实验结果表明,该方法能够减小现有检测方法产生的非线性误差和重复性误差,避免因阈值选取不当而造成的测量错误,具有很好的工程应用前景。In order to overcome the disadvantage of traditional detection method of residence times difference fluxgate（RTDF） ,a new method using curve fitting of digital fluxgate signal to search the position of the peak and calculate residence times difference was proposed and tested on self-designed residence times difference fluxgate. Result shows that the RTD fluxgate has linearity error of ±.0. 002 6% ,sensitivity of 8.5 ns/nT and repetitive error less than 0.05 in the range of ± 10 × 104 nT. It is proved that the new method reduces the linearity error and repetitive error of the traditional ones and avoids detection failure caused by inappropriate threshold. It shows good prospect in engineering application.

关 键 词：磁通门传感器 迟滞时间差 AD采样 曲线拟合 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]