The sensor makes the fiber bragg grating(FBG) adhibited with the giant magnetostrictive material(GMM). The strain change of GMM is transferred to FBG, which caused by the change of its magnetic field from the current coil, then the current will be detected from modulating the FBG change. The paper succeeds in modulating the sensing signal by the way of connecting FBG with matching GMM, and the signal is processed by wavelet analysis technology, which can reduce the error effect from the noise and get the clear picture. Then multisensor data fusion based on radial basis function (RBF) neural network is used in error compensation of the FBG current sensor. The simulation results illustrate that this method is feasible and more effective.
[1] Kersey A D, Davis M A, Heather J, et a1. Fiber grating sensors[J]. Lightwave Technology, 1997, 15(8)：1442-1463. [2] Calkins F T, Smith R C, Flatau A B. Energy-basedhysteresis model for magnetostrictive trans- ducers[J]. IEEE Trans. on Magnetics, 2000, 36 (2)：429-439. [3] 熊燕玲, 赵洪, 张剑, 等. 基于超磁致伸缩材料的光纤光栅交流电流传感系统[J]. 电工技术学报, 2006, 21(4)：17-19. [4] 王湘江, 王兴松. 超磁致伸缩驱动器建模及其迟滞补偿[J]. 仪器仪表学报, 2007, 28(5)：812-819. [5] 周金芳, 李明范. 基于超磁致伸缩材料的光纤光栅调谐范围研究[J]. 光子学报, 2007, 36(1)：120-123. [6] 杨兴, 贾振元. 超磁致伸缩材料的伸缩特性及其磁感应强度控制原理及方法的实现[J]. 电工技术学报, 2001, 16(5): 55-58. [7] Mora J, Diez A, Cruz J L, et a1. A magnetostrictive sensorinterrogated by fiber gratings for DC—current and temperature discrimination[J]. IEEE Photonics Technology Letters, 2000, 12：1680-1682. [8] 钟小江, 仝卫国, 李宝树. 小波分析在光纤光栅传感信号处理中的应用[J]. 仪器仪表学报, 2007, 28(增刊Ⅱ)：613-617. [9] Xu L, Krzyza K A, Suen C Y. Method of combining multiple classifiers and their application to handwriting recognition[J]. IEEE Tran. SMC, 1990, 22(3)：418-435. [10] Tong Weiguo, Hou Liqun, Li Baoshu. Application of multisensor data fusion based on RBF neural networks fordrum level measurement[C]. IEEE 2006 International Conference on Mechatronics and Automation, Luoyang, 2006：1878-1882.
2009, Vol. 24 
