机械与电子2025，Vol.43Issue(11)：40-46,7.
基于声弹性效应与温度补偿的高强螺栓轴力监测系统
Axial Force Monitoring System for High-strength Bolts Based on Acoustoelastic Effect and Temperature Compensation
摘要
Abstract
To achieve high-precision online measurement of axial force in high-strength bolts of wind turbine towers,this paper designs and implements a non-contact intelligent monitoring system in-tegrating electromagnetic acoustic transducer(EMAT),multi-channel synchronous acquisition,and a temperature compensation algorithm.The system combines the acoustic-elasticity principle of the single-wave method with a first-order temperature correction model to establish a quantitative relationship be-tween bolt axial force and longitudinal wave time-of-flight(TOF)difference.Through integrated soft-ware,it realizes automatic wave detection,TOF extraction,and visual analysis.Experiments,including stepwise loading and temperature-controlled calibration,verify the system's measurement stability and compensation accuracy under complex conditions.Results demonstrate a strong linear correlation between axial force and TOF difference(R2>0.995),and the measurement error is reduced from a maximum of 86.7%to within 3%after temperature compensation.The system exhibits excellent engineering adaptabil-ity and application potential,offering reliable support for long-term structural health monitoring of wind power bolted joints.关键词
声弹性效应/螺栓轴力/电磁超声/单波法Key words
acoustoelastic effect/bolt axial force/electromagnetic acoustic transducer/single-wave method分类
信息技术与安全科学引用本文复制引用
张华明,王庆领..基于声弹性效应与温度补偿的高强螺栓轴力监测系统[J].机械与电子,2025,43(11):40-46,7.基金项目
江苏省自然科学基金资助项目(BK20221455) （BK20221455）
