Research on Temperature Characteristics Based on Optical Magnetic Field Sensors

Optical magnetic field sensors have the advantages of small size, light weight, good insulation properties, and high stability. They have a wide range of applications in the field of magnetic field detection, especially in the internal magnetic field detection of transformers. During long-term operation, the temperature inside the transformer will rise, causing drift in the static operating point, which affects the measurement accuracy. In order to study the interference of temperature changes on magnetic field measurement, this paper analyzes the mechanism of temperature affecting the static operating point and the optical rotation coefficient based on the model of light reflection and refraction in crystals established by the team. Finally, a method using a broad-spectrum light source to suppress interference caused by temperature fluctuations is proposed.