一种反馈式自平衡弱磁传感器设计

Design of A Feedback Self-balancing Weak Magnetic Sensor

目前弱磁传感器应用广泛,但普遍存在动态范围小等缺点。根据软磁材料的磁化特性,提出一种反馈式自平衡大动态范围的弱磁传感器设计方法。阐述了其工作原理和制作工艺,给出了磁感应探头、振荡器、单失谐回路斜率鉴频器、积分器和驱动器电路原理图,并详述了其工作原理。通过试验验证,该型弱磁传感器性能优良稳定,线性度好,灵敏度高,动态范围大,具有独特的创新性和新颖性,开创了一种新型弱磁传感器的设计方向。

Weak magnetic sensors are widely used at present, but generally there are some disadvantages such as small dynamic range. According to magnetization characteristics of soft magnetic materials, a method to design a weak magnetic sensor with feedback self-balancing and large dynamic range is proposed in this paper. The working principle and manufacturing process are described. The circuit schematic diagrams of magnetic induction probe, oscillator, single detuning loop slope frequency discriminator, integrator and voltage driver are given, and their working principles are described in detail. The experimental tests show that this type of weak magnetic sensor has good stability, good linearity, high sensitivity, wide dynamic range, unique innovation and novelty,and creates a new design direction of a new type of weak magnetic sensor.