瞬时激励的单线圈结构磁致伸缩传感器

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英文篇名：Transient excited magnetostrictive sensor based on single coil structure 作者：顾杰 ; 黎穗琼 ; 徐大诚 ; 祁响 英文作者：GU Jie;LI Sui-qiong;XU Da-cheng;QI Xiang;Research Center of Micro-nano Sensor Technology,Soochow University; 关键词：磁致伸缩传感器 ; 脉冲激励 ; 单线圈 ; 数字信号处理器 英文关键词：magnetostrictive sensor;;pulse excitation;;single coil;;digital signal processor(DSP) 中文刊名：CGQJ 英文刊名：Transducer and Microsystem Technologies 机构：苏州大学微纳传感技术研究中心; 出版日期：2019-01-16 11:34 出版单位：传感器与微系统 年：2019 期：v.38;No.324 语种：中文; 页：CGQJ201902015 页数：4 CN：02 ISSN：23-1537/TN 分类号：58-61

摘要

为了实现便携化测试,将传统的多线圈检测结构简化为单线圈,采用脉冲激励单线圈,并检测线圈输出信号,通过数字信号处理器(DSP)构成检测电路,达到简捷方便的测试目的。结合快速傅里叶变换(FFT)和线性调频Z变换(CZT)算法,提高了毫米级磁致伸缩传感器的检测精度,并完成了两种不同尺寸传感器(长度为4 mm和5 mm)的同时检测。实验测试结果表明:长度为4 mm的传感器灵敏度为0. 384 1 kHz/μgn,长度为5 mm的传感器灵敏度为0. 219 8 kHz/μgn。设计的传感器在便携式生化检测仪器中具有广泛的应用价值。
        In order to achieve portable test,traditional multi-coil detection structure is simplified as single coil structure. The measurement system uses digital signal processor( DSP) to construct dtetcting circuit,excite single coil by pulse,and then detect signal is output by the single coil,greatly simplifying the measurement. At the same time,fast Fourier transform( FFT) algorithm is combined with chirp Z transform( CZT) algorithm to improve the detection precision of millimeter-level magnetostrictive sensor. This system realizes simultaneous detection of magnetostrictive sensors with two different size of sensors,which are 4 mm and 5 mm. The experimental results show that the sensitivity of the sensor with length of 4 mm is 0. 384 1( k Hz/μg) and the sensitivity of the sensor with length of 5 mm is 0. 219 8( k Hz/μg). This sensor has wide applications value in portable biochemical detecting instrument.

引文

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