摘要
提出了一种基于电磁铁技术的光纤Bragg光栅(FBG)电流检测系统。首先利用Rogowski线圈对工频大电流采样,利用AD736对采样信号进行a.c./DC转换和处理。然后借助电磁铁技术,利用衔铁在电流产生的磁场力作用下间接带动FBG,实现Bragg波长漂移值,从而对电流进行传感探测。系统传感灵敏度可达到7.39×10-3nm/A。
A fiber Bragg grating（FBG） current detection system based on the technology of electromagnet was presented. Firstly, the great alternating current was sampled by Rogowski coil and AD736 was employed to transform the sampled signals from a.c. to DO. Secondly, the principle of current sensing detection with the aid of electromagnet technology had been described. Magnetism, which is produced by making the sampling electric current pass through electromagnet,draws FBG indirectly and makes the Bragg wavelength of FBG change,and the change can be measured by spectrometer. If the relation between the current and wave length is established, current can be sensed. Finally, the proposed system had been realized. The sensing sensitivity of the system can achieve 7.39× 10^-3 nm/A.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2006年第6期697-699,共3页
Journal of Optoelectronics·Laser
