Optical fiber current sensor, control method, electronic device, and storage medium

By introducing an excitation coil and a signal processing module into the fiber optic current sensor, combined with a phase modulator and a fiber optic delay loop, the problem of the fiber optic current sensor being susceptible to temperature and nonlinearity was solved, achieving high-precision and low-cost measurement results.

CN116359585BActive Publication Date: 2026-05-29BEIJING SIO TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING SIO TECHNOLOGY CO LTD
Filing Date
2023-04-17
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing fiber optic current sensors are susceptible to temperature and nonlinear factors, resulting in low measurement accuracy, high cost, and the need for expensive phase modulators and fiber optic delay loops.

Method used

By employing an optical path module, signal processing module, fiber optic sensing loop, excitation coil, and polarization-maintaining fiber, a low-cost fiber optic current sensor is realized by applying a balancing current to the excitation coil to keep the sensor's magnetomotive force in a balanced state, combined with a phase modulator and fiber optic delay loop.

Benefits of technology

This improves measurement accuracy, reduces sensitivity to temperature and nonlinearity, reduces reliance on expensive components, and enables low-cost fiber optic current sensors.

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Abstract

The application discloses an optical fiber current sensor, a control method, electronic equipment and a storage medium. The optical fiber current sensor comprises an optical path module, a signal processing module, an optical fiber sensing ring, an excitation coil, a polarization maintaining optical fiber and a sensing optical fiber. One end of the optical path module is connected with one end of the polarization maintaining optical fiber. The other end of the polarization maintaining optical fiber is connected with one end of the sensing optical fiber through a wave plate. The other end of the sensing optical fiber is wound around one circle along the circumferential direction of the optical fiber sensing ring, and then extends from the optical fiber sensing ring and is connected with a reflecting mirror. The excitation coil is wound around the optical fiber sensing ring and the sensing optical fiber along the circumferential direction of the optical fiber sensing ring, and is connected with the signal processing module. The optical path module is also connected with the signal processing module. The measurement result is not affected by temperature and nonlinearity, and the measurement precision is high.
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