低频感应式磁传感器优化设计  

Optimization of Induction Magnetic Sensors at Lower Frequency

作　　者：陈志毅[1] 周穗华[1] 吴志东[1] 

机构地区：[1]海军工程大学兵器系,武汉430033

出　　处：《四川兵工学报》2013年第4期123-126,共4页Journal of Sichuan Ordnance

摘　　要：针对目前低频感应式磁传感器没有明确的设计流程,设计时很大程度上依靠经验,以及在标定和试验中的一些难点问题,首先回顾了感应式磁传感器的结构和工作原理;然后对影响磁传感器性能的参数进行分析和仿真,得出设计磁传感器主要考虑的指标是自噪声和灵敏度,影响磁传感器自噪声的参数主要是线圈内阻,而影响磁传感器灵敏度的参数主要是磁芯的长度、直径和线圈匝数;最后在一定重量作为约束条件下,对磁传感器的关键技术指标进行优化设计,明确设计步骤,结果表明重量分配系数q在0～1之间有一个最优值,使得等效磁场噪声最小;最后对设计制作的磁传感器性能进行了标定和试验,得到实测的感应式磁传感器的频率特性和等效电路理论分析的曲线相吻合。There are no definite steps in the design of induction magnetic sensors, which are designed mostly by experience. And there are some difficulties in the process of calibration and experiment. The structure and working principle are reviewed at first. Then analysis and simulation of parameters which have an influence on the performance of induction magnetic sensors have been done. Results indicate that the self-noise is decided by resistance of the winding while the sensitivity is decided by length and diameter of the core and the turns of the winding. At last key parameters are optimized under some certain weight of the sensors. Results indicate that the equivalent noise has a minimum when weight distribution coefficient q is between 0 - 1. At last calibration and experiment are operated on a magnetic sensor according to steps above. Results indicate that the frequency characteristic of measured data is consistent with that of equivalent circuit theory.

关 键 词：感应式磁传感器 表观磁导率 长径比 灵敏度 重量分配系数 

分 类 号：TN98[电子电信—信息与通信工程]