基于加减运算的磁电式传感器信号调理电路设计

Design of Signal Conversion Circuit for Magnetoelectric Sensor Based on Addition and Subtraction Operation

磁电式传感器多用于发动机转速测量,其输出信号幅值、频率与转速成正比例关系,本文介绍了一种基于加减运算的磁电式传感器信号调理电路,分析了传感器工作原理与信号特性,设计了适合单片机信号采集的滤波、限幅、加减运算和电压比较电路等,给出了电路参数,进行了验证试验。试验结果表明:该电路巧妙的应用加减法电路,实现了磁电式传感器高幅值、宽频率的信号采集,信号完整性好,转换采集精度高,抗干扰能力强。

Magnetoelectric sensor is applied to the engine speed measurement,the output signal amplitued,frequency and speed proportional relations,this paper introduced a new type of magnetoelectric sensor signal conditioning circuit,analysed the working principle of the sensor and the signal characteristics,designed for single chip microcomputer signal acquisition of filter,add and subtract operation circuit and voltage comparator circuit,circuit parameters was given,and the validation test.Experimental results show that the circuit is the clever use of amplification bias circuit,ealizes the magnetoelectric sensor wide amplitude,wide frequency signal acquisition,signal integrity,convert acquisition of high precision,strong anti-jamming capability.