摘要
提出了一种对静态应变进行高分辨率测量的方法。该方法是把Bragg光纤光栅(FBG)与全光纤法布里_珀罗传感器(FFPI)组合起来,利用FBG反射波长的漂移特性来测量干涉条纹的数目。通过利用FFPI和伪外差解调法对小数条纹进行解调,可实现高分辨率的测量。结果表明,静态应变的测量分辨率达到了33×10-9ε(ε为应变)。
A novel method for high resolution static strain measurement was proposed and demonstrated. This method was based on the combination of two fiber Bragg grating （FBG） and an all-fiber Fabry-Perot sensor （FFPI） formed by the two FBGs. The wavelength shift of the FBGs was used for determining the fringe number of the interferometic signal while the FFPI, and the pseudo-heterodyne was used to carry out high-resolution measurement. The resolution for static strain by the actual measuring is 33 × 10^-9ε.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2005年第4期559-562,共4页
Optical Technique
关键词
静态应变
光纤光栅
伪外差
static strain
tiber grating
pseudo-heterodyne
