激光技术2017，Vol.41Issue(6)：862-866,5.DOI:10.7510/jgjs.issn.1001-3806.2017.06.019
偏振正交双频DBR腐蚀声发射传感器研究
Study on corrosion acoustic emission sensor based on orthogonally polarized dual-frequency DBR laser
摘要
Abstract
In order to realize on-line monitoring of metal corrosion based on optical fiber sensors , a distributed Bragg reflection( DBR) fiber laser was used as the corrosion acoustic emission sensor , aiming at on-line monitoring of metal Q235 corrosion acoustic emission.The working mechanism and model of polarized orthogonal DBR fiber laser were studied , and the influence of resonator parameters of polarized orthogonal dual-frequency DBR laser as corrosion acoustic emission sensor on the performance was analyzed.The acoustic emission detection experiment based on polarized orthogonal dual-frequency DBR laser was carried out.The optimum design of polarized orthogonal DBR fiber laser was experimentally studied , and the characteristics of the corrosion stage of Q235 carbon steel were presented.The results show that polarized orthogonal DBR fiber laser can not only detect metal corrosion acoustic signal , but also characterize three major corrosion phases of metal corrosion by the variation of the average beat frequency values with the detection frequency range of 0MHz ~1MHz.The research project provides the theoretical and technical basis for the optimization design and fabrication of polarized orthogonal DBR corrosion acoustic emission sensors and networks.It is of great significance on on-line corrosion monitoring of metal corrosion , especially nuclear grade key materials.关键词
光纤光学/分布式布喇格反射声发射传感器/正交解析/新型传感器Key words
fiber optics/distributed Bragg reflector acoustic emission sensor/orthogonal analysis/new sensor分类
信息技术与安全科学引用本文复制引用
严雪莹,曾周末,封皓..偏振正交双频DBR腐蚀声发射传感器研究[J].激光技术,2017,41(6):862-866,5.基金项目
国家自然科学基金资助项目(61304244) （61304244）
