摘要
研究了光纤Bragg光栅在材料性能测试方面的应用。介绍了基于分离式霍布金逊压杆(SHPB)的低阻抗材料动态性能测试的原理,探讨了光纤光栅传感器用于SHPB实验装置中进行应变测试的相关问题。推导了低阻抗弹性杆中传播的应力波与光纤光栅传感器的波长漂移量之间的关系式,构建了光纤光栅高频动态应变测试系统,对SHPB实验装置中被撞击弹性杆的表面应变进行了测试,并与现有仪器进行了对比。实验结果显示,构建的光纤光栅动态应变测试系统在10kHz的频率范围内,具有40dB的信噪比。研究表明,光纤光栅在低阻抗材料的动态性能测试中具有很好的应用前景。
The application of Fiber Bragg Grating（FBG） sensor to measurement of material property is researched. The principle of Split Hopkinson Pressure Bar （SHPB） for dynamic performance measurement of low impedance material is introduced and the problems related to the application of FBG sensor in SHPB for strain testing are discussed. The relation between the strain wave propagating in elastic bar of low impedance material and the wavelength shift is derived. Then, the interrogation system for high frequency dynamic strain measurement based on FBG is set up and the surface strain of elastic bar in SHPB is measured with the interrogation system and compared with the instrument PI02- 04. The experimental results show that the interrogation system has good performance during 10 kHz and its signal-to-noise is about 40 dB. Research results prove that FBG sensor has a good application prospect in the dynamic performance measurement of low impedance material.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第3期488-492,共5页
Optics and Precision Engineering
基金
教育部博士点专项科研基金资助项目(No.2003006017)
关键词
光纤BRAGG光栅
低阻抗材料
分离式霍布金逊压杆
动态解调
Fiber Bragg Grating （FBG）
low impedance material
Split Hopkinson Pressure Bar （SHPB）
dynamic demodulation
