基于电容耦合原理的非接触式家用电压测量装置研究

Research on Non-contact Household Voltage Measuring Device Based on Capacitive Coupling Principle

为实现家用电压的非接触测量,进一步降低配电网的安全风险,设计了一种非接触式的家用电压测量装置。装置基于电容耦合原理,在电缆外包裹铜皮形成圆柱形电容器,选择合适参数输入阻抗,设计合理的信号采集及硬件调理电路,结合单片机控制模块,实现了家用电压的非接触测量与实时显示。结果表明,装置灵敏度高、测量稳定精确,且结构简单、成本低廉,满足家用电压的非接触测量要求,为未来家用电表的新形态提供了一种新的思路。

A non-contact household voltage measuring device was designed in this paper to achieve non-contact measurement of household voltage and reduce safety risks of the distribution network.Based on the capacitive coupling principle,copper sheath was wrapped around the cable to form a cylindrical capacitor.Non-contact measurement and real-time display of household voltage was realized by means of input resistance with appropriate parameters,reasonable signal acquisition and hardware conditioning circuit,as well as single-chip control module.Experimental results showed that the proposed device was highly sensitive and able to make stable and accurate measurement and had simple structure and low cost,and could meet the non-contact measurement requirements of household voltage,thus providing a new idea for new patterns of household electricity meters in the future.