1 火箭军工程大学基础部, 陕西 西安 710025
2 中国人民解放军96863部队, 河南 洛阳 471000
3 火箭军工程大学导弹工程学院, 陕西 西安 710025
为了进一步提高耦合锥结构光纤超声传感器的整体性能,使其更好地服务于光纤超声无损检测,用有限元分析法仿真分析了耦合锥体材料参数对传感器响应灵敏度的影响。以此为依据挑选出4种超声聚能效果优越的锥体材料,并计算出与其匹配的最佳响应锥尖角度,优化设计了4款基于74°铝锥、30°有机玻璃锥、130°聚苯乙烯锥、126°天然橡胶锥的光纤超声传感器。实验结果表明,这4款传感器均能够有效检测频率为1 MHz的超声波信号,相比现有的传感器在响应灵敏度方面有较大提升,可以有效改善传感器的传感性能;且结构更小巧轻便,能够应用的场合更广泛。
传感器 光纤光栅 耦合锥 材料参数 锥角 光学学报
2020, 40(23): 2306004
Author Affiliations
Abstract
1 Xi’an Research Institute of High-Technology, Xi’an 710025, China
2 Department of Physics, Northwest University, Xi’an 710069, China
3 e-mail: zhongb_qin@163.com
A hybrid fiber interferometer sensing configuration for displacement and temperature measurements is proposed and experimentally demonstrated that is constructed by splicing a short section of polarization maintaining optical fiber to an end-cleaved single mode optical fiber with a tapering structure. The reflected spectrum changes with the variation of displacement and temperature. The sensing configuration uses the method of wavelength and intensity modulations for displacement and temperature measurements, respectively, to which the sensitivities are 0.01392 nm/μm, 0.0214 dBm/μm, 0.09136 nm/°C, and 0.15795 dBm/°C. Experimental results show that displacement and temperature can be measured simultaneously by demodulating the reflected spectrum.
060.0060 Fiber optics and optical communications 060.2310 Fiber optics 060.2370 Fiber optics sensors Chinese Optics Letters
2015, 13(5): 050603
