新型光纤Bragg光栅振动传感系统  

A novel fiber Bragg grating vibration sensor

作　　者：姜明顺[1] 冯德军[2] 隋青美[1] 刘波[3] 

机构地区：[1]山东大学控制科学与工程学院,山东济南250061 [2]山东大学信息科学与工程学院,山东济南250100 [3]南开大学现代光学研究所,天津300071

出　　处：《光电子．激光》2010年第1期34-37,共4页Journal of Optoelectronics·Laser

基　　金：山东省自然科学基金资助项目(Z2006G06);山东省中青年科学家奖励基金资助项目(2006BS01001)

摘　　要：分析并实验研究了一种基于机械感生长周期光纤光栅(MLPFG)解调的新型光纤Bragg光栅(FBG)振动传感系统。利用机械线加工技术(MLPT)为制作周期为600μm、长为60mm的不锈钢槽板,采用机械感生法写制了中心波长1539.820nm、谐振线性边带大于6nm的MLPFG作为滤波器。选用中心波长为1542.400nm、3dB带宽为0.3nm的FBG设计振动传感器,通过附加电磁阻尼提高了稳定性,扩大了无失真频率测量范围。实验表明,该振动传感系统具有良好的动态响应特性,响应频谱与激振信号完全吻合,频率测量范围为10～3×103kHz,并具有良好的冲击振动响应。A novel fiber Bragg grating vibration sensor system was presented based on the demodulation by a mechanical-induced long period fiber grating（MLPFG）.The stainless steel grooved board which was fabricated by mechanical line processing technology （MLPT）,was used to make MLPFG with period of 600 μm,length of 60 mm.The MLPFG was adopted as filter in system,and its center wavelength is 1 539.820 nm,the length of the slope is larger than 6 nm.The vibration sensor was made by a special chosen FBG,whose center wavelength is 1 542.400 nm,3 dB bandwidth is 0.3 nm.Through adding electromagnetic damping,the sensitivity of signal detection was improved and the range of frequency measurement was expanded.It is proved in the experiment that the FBG sensor has a good dynamic response,and its frequency spectrum agree with the excitation signal exactly. Its testing frequency domain is between 10 Hz and 3 kHz,and it also has good impact vibration response.

关 键 词：振动传感器 机械感生长周期光纤光栅(MLPFG) 光纤Bragg光栅(FBG) 滤波解调 

分 类 号：TN253[电子电信—物理电子学]