传感技术学报2016，Vol.29Issue(7)：957-961,5.DOI:10.3969/j.issn.1004-1699.2016.07.001
用于监测阀门泄漏的超高动态范围全光纤超声传感系统
A High Dynamic Range All-Fiber Ultra-Acoustic Pressure Sensing System for Detection of Valve Leakage
摘要
Abstract
A novel high dynamic range all-fiber ultra-acoustic pressure sensing system for detection of ultra-acous⁃tic waves emission caused by valve leakage is introduced in this paper. Based on photoelastic effect,the ultra-acous⁃tic waves acting on sensing fiber can cause phase changes of the light transmitting in the sensing optic fiber. The in⁃terference structure in the sensing system converses phase changes into the intensity of two interference signals. Through demodulation and power spectrum analysis,the information of original ultra-acoustic signals can be extract⁃ed. The system’s practicability and effectiveness is proved by field testing and its dynamic range is calculated un⁃der laboratory conditions.关键词
光纤传感/阀门泄漏/超声检测/声发射Key words
fiber sensing/valve leakage/ultra-acoustic detection/acoustic emission分类
信息技术与安全科学引用本文复制引用
叶子,王超..用于监测阀门泄漏的超高动态范围全光纤超声传感系统[J].传感技术学报,2016,29(7):957-961,5.基金项目
国家仪器项目（（NIP）项目 （）
