Research of DC Current Measurement Technology Based on Optical Fiber Thermometry

摘要

Thin film sensor has the advantages of small size and low cost, which has become a research hotspot in recent years. A measurement system of passive optical fiber DC current sensor based on the thin film sensors is designed in this article. Designs of electric-heating converter, heating-light converter and low-voltage measurement display system are introduced in detail. Experimental results indicate that the general linear correlation between the time constant of fluorescent lifetime z and the voltage across the thin film resistor. The feasibility of measurement system is verified via the results of the experiment.