Optical leakage current sensor based on garnet

• Main Authors: SHEN YANGFAN, ZHAO XINWEI, PAN QIAN, HAO RUIRUI, LIANG BAOJIAN, JIAO XINBING, BAI XUE
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2017
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to an optical leakage current sensor based on a garnet. The optical leakage current sensor comprises a laser, a first lens, a detection unit, a second lens and an optical receiver. The detection unit is formed by a garnet module, graphite and a detected module, which are attached from the front to back in sequence. The area of the graphite is larger than that the area of the garnet module; the garnet module and the graphite form a sensing module; laser light output by the laser is focused by the first lens and is then, output to the detection unit; the incident light passes through the garnet module and reaches the graphite; then the light is reflected by the graphite and passes through the garnet module again to form reflected light, which is output; and the light output from the detection unit is focused by the second lens and then, is received by the optical receiver. Once the detected module has leak current, the reflected light of the detection unit changes. The optical leakage curr