自激振荡磁感应传感器研究  

Research on Self-oscillating Magnetic Induction Sensors

作　　者：张志勇[1,2] 陈正想 高俊奇 ZHANG Zhiyong;CHEN Zhengxiang;GAO Junqi(Qingdao Innovation and Development Base,Harbin Engineering University,Qingdao 266300,China;No.710 R&D Institute,CSSC,Yichang 443003,China)

机构地区：[1]哈尔滨工程大学青岛创新发展基地,山东青岛266300 [2]中国船舶集团有限公司第七一〇研究所,湖北宜昌443003

出　　处：《数字海洋与水下攻防》2023年第6期743-748,共6页Digital Ocean & Underwater Warfare

基　　金：国家重点研发计划“海洋电磁场传感器研发与电磁探测应用示范”(2022YFC3104002)。

摘　　要：面向数字式、小体积的磁场传感器应用需求,现有的感应式磁场传感器普遍存在硬件电路复杂,数字化需要使用模数转换器件,难以实现小型化的问题,需探索一种新原理磁场传感器。因此,提出了一种基于自激振荡磁感应技术的磁场传感器,该传感器测量原理基于激励电压占空比与被测磁场的线性关系。与其他磁场传感器相比较,提出的磁场传感器输出为占空比形式,不需要额外的滤波电路和模数转换电路,硬件电路较为简单,因此有利于实现数字化和小型化。同时,分析了自激振荡产生过程,建立了激励电压占空比与被测磁场的理论方程;制作了原理样机,验证了基于自激振荡磁感应技术的传感器实现的可行性。结果表明,在开环条件下,±100000 nT量程下传感器的线性度在0.98%。Aiming at the application requirements of digital and small-volume magnetic field sensors,it is necessary to explore a new magnetic field sensor,because existing inductive magnetic field sensors generally have the problems of complex hardware circuits,the need to use analog-to-digital conversion devices for digitalization,and it is difficult to achieve miniaturization.In this paper,a magnetic field sensor based on self-oscillating magnetic induction technology is proposed.Its measurement principle is based on the linear relationship between the duty cycle of the excitation voltage and the measured magnetic field.Compared with other magnetic field sensors,the output of the magnetic field sensor proposed in this paper is in the form of duty cycle,which does not require additional filtering circuits and analog-to-digital conversion circuits,and the hardware circuit is relatively simple,so it is beneficial to digitalization and miniaturization.Besides,the generation process of self-excited oscillation is analyzed,and the theoretical equation of excitation voltage duty cycle and measured magnetic field is established.A prototype is made to verify the feasibility of the magnetic field sensor based on self-excited oscillation magnetic induction technology.The results show that under open-loop conditions,the linearity of the sensor is 0.98%with the range of±100000 nT.

关 键 词：磁场传感器 数字式传感器 自激振荡 

分 类 号：TM933[电气工程—电力电子与电力传动]