一种新型传感结构的光纤直流电流传感器

Optical fiber DC sensor with novel sensing structure

提出了一种用于高压直流电流测量的光纤传感器的新结构,采用这种光学结构的传感器能够克服原有传感器光路在光输出不对称时,测量误差较大,无法实现对被测量高准确度解调的缺点。实验结果表明:即使双光路间的衰减系数差异5倍时,被测直流电流的相对误差小于0.2%。

A novel sensing structure of optical fiber current sensor for DC measurement in high voltage systems is presented. Adopting this novel sensing structure sensor, a high accurate demodulation is achieved, and the drawback that measurement error is prominent for asymmetry light output can be overcome. The test results show that even difference between the attenuation coefficients of double-light-paths is 5 times that the relative error of the measured DC is less than 0.2 %.