Leakage current detection sensor

The invention belongs to the technical field of current detection, and provides a leakage current detection sensor, which comprises a magnetic core, a conductive coil is wound on the magnetic core, two ends of the conductive coil are electrically connected to a current analysis circuit, and the current analysis circuit enables the conductive coil to generate positive and negative alternating excitation signals, a leakage current passing through the magnetic core is modulated in the excitation signal. The leakage current detection sensor has the advantages that the leakage current detection sensor based on the circuit modulation technology is provided, direct current and alternating current leakage current can be detected, and meanwhile the circuit and the structure are simple and easy to implement. 本发明属于电流检测技术领域，提供了一种漏电流检测传感器，包括：磁芯，所述磁芯上缠绕有导电线圈，所述导电线圈的两端电连接于电流分析电路，所述电流分析电路使所述导电线圈产生正负交替的激励信号，经过所述磁芯的漏电流将被调制于所述激励信号中。本发明的优点在于提出了基于电路调制技术的漏电电流检测传感器，其可对直流和交流漏电电流进行检测，同时电路和结构简单、易于实现。