HE Jing, LI Bin. Fluxgate sensor based on second harmonic pulse peak-to-peak value law[J]. 2007, (7): 73-74+79. DOI: 10.13873/j.1000-97872007.07.017.
基于二次谐波脉冲幅值法的磁通门传感器
摘要
简述了磁通门现象的数学模型和工作原理。针对磁通门传感器在提高带宽时噪声也会随之增大的问题
应用二次谐波选择法设计了磁通门信号处理电路
试制了一种宽带低噪声磁通门传感器
很好地解决了提高带宽和降低噪声之间的矛盾。经测试
样机带宽可以达到700 Hz以上
10 Hz处的噪声小于10 pT/Hz
线性度为0.2%。
Abstract
The basic principle and mathematical model of fluxgate magnetometer are discussed.A type of fluxgate with wide bandwidth and low noise which the signal processing circuit is based on the method of choosing second harmonic solves the contradiction between bandwidth and noise successfully.The result indicates that the bandwidth can be over 700 Hz.The noise at 10 Hz is less than 10 pT/Hz and the linearity is 0.2 %.