基于无线传输的大量程霍尔电流传感器设计

Design of large range Hall current sensor based on wireless transmission

在原理上使用霍尔效应进行电流检测；在结构上使用差动磁路进行了温度的修正，使用CMOS技术拥有更高的集成度；在精度上使用STM32单片机实现了对线性度的调整和温度补偿；通过添加屏蔽层，降低了电磁干扰。具有CAN总线传输功能，同时实现了与无线传感器网络的对接，具有短距离无线传输能力，使新型的智能传感器能够更好地适应各种高低温环境。实验表明：该传感器的测量范围可达±100A，精度可达0．5％，可以实现CAN总线通信，同时在0-50m范围内可实现无线传输。

In principle, using Hall effect to detect current; in structure, using differential magnetic circuit for temperature correction and CMOS technology for a higher degree of integration ; in precision, using STM32 MCU to achieve linearity adjustment and temperature compensation;by adding shielding layer to reduce electromagnetic interference. It has CAN bus transmission functions, while achieving docking with wireless sensor networks （WSNs） at the same time, and has short-range wireless transmission capability, which makes the new type intelligent sensors can able to adapt to a variety of high-low temperature environment better. Experiments show that measuring range of sensor can reach ＋ 100 A, precision can reach 0.5 % ,and CAN bus communication can be achieved,while wireless transmission can be realized at range of 0 -50 m at the same time.