This paper adopts harmonic choice method to design fluxgate signal processing circuit in allusion to the environment magnetic field strength signal of fluxgate sensor detecting.

针对磁通门传感器检测到的环境磁场强度信号，运用谐波选择法，设计了磁通门信号处理电路。

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A ferrous metal pole wheel passing the sensor face changes the magnetic field strength, resulting in an ac voltage being induced in the coil.

当一个铁磁性极轮通过传感器头部的感应磁场时，就会在电感线圈内产生一个交流电压。

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