Optical current sensor

• Main Authors: SHEN YANGFAN, ZHAO XINWEI, PAN QIAN, HAO RUIRUI, JIAO XINBING, BAI XUE
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a current sensor. Full-polarized light emitted by a laser is split into two beams of linearly polarized light through a polarization beam splitter prism, transmission light is reflected to garnet through a reflective mirror, and another beam of reflected light directly irradiates on the garnet; one part of the light irradiating on the garnet transmits the part, not shielded by graphite, of the lower portion of the garnet and passes through a polarization analyzer to be absorbed by a first light intensity detector to be used for detecting big currents; the other part of the light irradiating on the garnet is shielded by the graphite under the garnet and reflected by the garnet to acquire information by a second light intensity detector to be used for detecting leakage currents. The current sensor can test the big current information and the leakage current information simultaneously and eliminate the leakage currents and has the advantages of being few in optical path element, simple i