干涉/强度调制型自校准F-P腔光纤传感器的应变测量  

Self-calibrated Interferometric-intensity-based Optical Fiber F-P Sensors for Strain Measurement

作　　者：杨杞[1] 王晓娜[2] 

机构地区：[1]大连民族学院理学院,辽宁大连116600 [2]大连理工大学物理系,辽宁大连116024

出　　处：《仪表技术与传感器》2008年第8期13-14,17,共3页Instrument Technique and Sensor

摘　　要：文中介绍了强度/干涉调制型自校准F-P腔光纤传感器系统及其工作原理,系统采用中心波长为1310 nm的LED作为光源,粗波分复用器将传感头反射回的光分为宽谱和窄谱2路,其比值可以消除光源以及光纤损耗引起的光功率波动对测量的影响。此系统结合了强度调制型和干涉型光纤传感器的优点,既可对静态应变进行测量,又可对动态应变进行实时监测。测量结果表明:系统对于静态应变测量的线性范围为200με,最小分辨率可达0.5με;在动态应变测量中,可以准确获得悬臂梁的振动频率。Self calibrated interferometric-intensity-based optical fiber sensors were described. The center wavelength of the light-emitting diode （LED） light source is 1310 nm. Coarse wavelength division multiplexer （CWDM） was used to split the reflected lights from the F-P cavity into two branches, which contain a narrowband spectrum and a broadband spectrum. The ratio of them can eliminate the influence of the fluctuation of the light source output power and fiber loss. The sensor system that combines the advantages of the interferometry and intensity-based device can measure both static and dynamic strain. Experimental results show that in the static strain measurement, the full scale of 200 and the minimum resolution of 0, 5 can be reached. In the dynamic strain measurements the accurate frequency of the cantilever can be obtained.

关 键 词：自校准 F—P腔 应变 粗波分复用器 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]