安全与环境工程2024，Vol.31Issue(6)：83-90,8.DOI:10.13578/j.cnki.issn.1671-1556.20230904
基于FBG增敏传感技术与WT-MCMC算法的护栏冲击检测技术
Guardrail impact detection technology based on FBG sensitization sensing technology and WT-MCMC algorithm
摘要
Abstract
In order to realize the active early warning of the collision accidents at the accident-prone points,start the emergency alarm and rescue system in time,and improve the safety protection level of highway,a guardrail monitoring test platform was built,and a sensitized fiber grating stress sensor was selected to monitor the collision stress;at the same time,based on the principle of wavelet change(WT),sym6 wavelet base was used for 10-layer decomposition to denoise the impact signal;finally,according to the characteristics of normal distribution of stress propagation,the binary Gaussian function was constructed for the response value of sensor impact force to the size and position of the applied impact force.The objective function was sampled by Markov chain-Monte Carlo(MCMC)algorithm,and the parameters of the binary Gaussian function were inverted.The sensor impact force response value and the distribution function of impact force size and location were obtained based on the monitoring data.The results show that the error between the monitoring value of the impact force and the impact force applied by the sensitized fiber grating sensor is controlled within 5%,which can meet the requirements of engineering monitoring.According to the impact force and position applied by the experiment,the error between the calculated results of the inverse binary Gaussian function and the monitoring results of the sensor is controlled within 2%,which indicates that the inverse binary Gaussian function can realize the impact force monitoring and accurate positioning of the guardrail.关键词
交通安全/光纤光栅(FBG)/小波降噪/MCMC算法/护栏冲击检测Key words
traffic safety/fiber Braggr grating(FBG)/wavelet denoise/MCMC algorithm/guardrail impact detection分类
资源环境引用本文复制引用
胡东涛,张占荣,徐海波,汪晶,智浩,吴立..基于FBG增敏传感技术与WT-MCMC算法的护栏冲击检测技术[J].安全与环境工程,2024,31(6):83-90,8.基金项目
湖北省重点研发计划项目(2021BAA050) （2021BAA050）
湖北省安全生产专项资金科技项目(SJZX20230911) （SJZX20230911）
