摘要
设计并实现了一种基于光电隔离器HCPL-7840的电流传感器,该传感器采用一片高精度、低阻值的采样电阻采集大电流信号,然后通过HCPL-7840及一系列运放,将之转为电压信号,该电压信号正比于采集的电流信号。实验表明该传感器具有较高的精度,适用于一些需要采集大电流信号的场合。
This thesis designed a kind of current sensor based on optical isolators HCPL-7840, which used a high precision, low-resistance sampling resistor. Through the HCPL-7840 and a series of op-amp, the cur- rent signal can be converted into voltage, the voltage signal is proportional to the collected current. Experi- ments show that the sensor has high accuracy for some current-sampling occasions.
出处
《微电机》
北大核心
2012年第5期48-51,共4页
Micromotors
基金
公益性行业科研专项:固定翼无人机航磁探测系统研制(201011080)
关键词
光电隔离放大器
采样
电流
电压
isolation Amplifier
sampling
current
voltage
