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Design and development of a low-cost optical current sensor.

Joseba Zubia¹, Luciano Casado, Gotzon Aldabaldetreku

¹Department of Communications Engineering, ETSI de Bilbao, University of the Basque Country (UPV/EHU), Alameda de Urquijo s/n, Bilbao 48013, Spain. joseba.zubia@ehu.es.

Sensors (Basel, Switzerland)

|October 25, 2013

Summary

This study presents a low-cost optical current sensor using Faraday rotation. The developed sensor offers high sensitivity and linearity for measuring electric currents up to 800 A with minimal error.

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Area of Science:

Optoelectronics
Magneto-optical sensing
Electrical engineering

Background:

Accurate current measurement is crucial in various electrical systems.
Traditional current sensors may face limitations in cost, size, or performance.

Purpose of the Study:

To design and demonstrate a cost-effective optical current sensor.
To leverage the Faraday effect for magnetic field detection related to current.

Main Methods:

Utilized the Faraday rotation principle in a magneto-optical material (SF2).
Developed a prototype optical fiber sensor.
Characterized sensor performance for a range of electric currents.

Main Results:

Achieved high sensitivity and linearity for currents from 0 to 800 A.
Demonstrated a low error rate (<1%) for currents exceeding 175 A.
The sensor design proved to be low-cost.

Conclusions:

The developed optical current sensor is a viable, low-cost solution.
The sensor exhibits excellent performance characteristics for practical applications.
Faraday rotation in SF2 is effective for precise current sensing.