低碳钢薄板TIG焊热影响区温度光纤光栅测量  

Temperature measurement of heat affected zone using fiber Bragg grating during the TIG welding process of low-carbon steel sheet

作　　者：李玉龙[1,2] 姜智超[1] 冯艳[1] 张华[1] 

机构地区：[1]南昌大学机电工程学院机器人与焊接自动化重点实验室,南昌330031 [2]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001

出　　处：《光通信技术》2012年第1期53-55,共3页Optical Communication Technology

基　　金：国家自然科学基金(No.50905082;No.61067003)资助;江西省青年科学家(井冈之星)培养对象计划项目(2010DQ01000)资助;江西省自然科学基金(2010GQC0129)资助;江西省教育厅青年科学基金项目(GJJ11035)资助

摘　　要：为了对焊接热影响区温度和应变的实时测量及控制,以光纤光栅作为传感器对低碳钢薄板的TIG焊热影响区进行了温度场网络测量。采用金属化保护的方法对裸光栅进行了保护和温度增敏;测量并标定了金属化光纤光栅的温度特性;采用光纤光栅和传统的热电偶进行了单点测温,并进行了对比分析;对经历了焊接热影响区高温的光纤光栅进行了温度特性分析。进行了多点温度的网络测量;分析了光纤光栅测量焊接温度和变形存在的问题;提出并设计了一种基于光纤Bragg光栅的焊接应变、温度同时测量的方法和多点测量系统。In order to real time measure and control temperature and strain of heat affected zone（HAZ） during low-carbon steel TIG welding process, temperature measurement was carried out using fiber Bragg grating （FBG）. Metallization method was used to protect grating part and enhance temperature sensitivity; temperature characteristic of the metallized FBG was calibrated; single point temperature was measured and compared by using of FBG and thermocouple, respectively. Furthermore, influence of welding cycle on the character of FBG was discussed. Multi-point temperature measurement was conducted. A FBG-based multi-point temperature measurement system was proposed, the feasibility to measure multi-point temperature field was varified by experiments.

关 键 词：光纤光栅 TIG焊 温度 应变测量 

分 类 号：TG454[金属学及工艺—焊接] TP212[自动化与计算机技术—检测技术与自动化装置]