基于光纤光栅螺栓松转角测量的螺栓联接状态监测方法  

Bolt Connection State Monitoring Method Based on Fiber Grating Bolt Loosening Angle Measurement

作　　者：余伟 王涛[1] 邓少华 卢明戈 鲁光涛[3] 杨丹[3] YU Wei;WANG Tao;DENG Shaohua;LU Mingge;LU Guangtao;YANG Dan(Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Precision Manufacturing Institute,Wuhan University of Science and Technology,Wuhan Hubei 430081,China)

机构地区：[1]武汉科技大学冶金装备及其控制教育部重点实验室,湖北武汉430081 [2]武汉科技大学机械传动与制造工程湖北省重点实验室,湖北武汉430081 [3]武汉科技大学精密制造研究院,湖北武汉430081

出　　处：《传感技术学报》2023年第4期549-554,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(51808417,51375354);湖北省教育厅青年基金项目(Q20131104)。

摘　　要：针对大型结构中螺栓联接件用量多、分布跨度大、松动难以监测的问题,提出一种基于光纤光栅传感的螺栓松动监测方法,利用光纤光栅传感器监测螺栓松动过程中松转角的变化,进而实现对螺栓联接状态的监测。设计了一种适用于分布式多螺栓的级联式FBG螺栓联接状态监测传感器装置,采用光纤接头实现分布式多螺栓联接。通过理论计算分析,得到波长偏移与松转角的理论关系,确定最佳角度测量区间,建立进行螺栓松转角监测的实验装置。结果表明,传感器在45°~65°范围内存在很好的线性关系和灵敏度,波长偏移与松转角的灵敏度为108.11 pm/°,最小能测量0.38°的螺栓松转角度变化。作为螺栓松动监测的新方法,所提方法对实现大型结构中螺栓联接件分布式监测具有重大意义。For looseness detection of bolted joins in large structures with wide distribution span,a bolt loosening monitoring method based on fiber grating sensing is proposed,which is realized through measuring the loosening angle with fiber Bragg grating(FBG).A cascade FBG bolt connection status monitoring sensor for distributed multi⁃bolt connections is designed.Through theoretical calculation and analy⁃sis,the theoretical relationship between the wavelength shift and the loosening angle is obtained,and the optimal angle measurement range is determined.An experimental device is established and the experiments are performed.The experimental results show that the sensor has good linear relationship and high sensitivity in the range of 45°~65°.The sensitivity of the wavelength shift and the loosening angle is 108.11 pm/°.The minimum measurement loosening angle can reach 0.38°.As a new method of bolt looseness detection,the proposed method is meaningful to realize the monitoring for large amount of bolted joints in distributed bolt groups of large structures.

关 键 词：FBG传感器 螺栓松转角度 螺栓松动监测 分布式监测 

分 类 号：TH712[机械工程—测试计量技术及仪器]