磁致伸缩导波技术在锚杆检测中的应用研究

Research of anchor rod detection using magnetostrictive guided waves

为了创造安全的工作环境,基于铁磁性材料的磁致伸缩效应,提出了用磁致伸缩超声导波对锚杆进行检测。论述了检测原理,对导波在锚杆中的传播进行了理论建模,提出了非接触式导波激励和接收方法,研制了相关的实验装置,并对检测信号进行了处理和分析。实验结果表明,磁致伸缩导波技术能够有效可靠地测定锚杆长度及缺陷。

Aiming at creating a safe work environment,based on magnetostrictive effect of ferromagnetic materials,a novel method was proposed for anchor rod detection applying magnetostrictive guided waves.Basic detecting principle of the method was introduced,and model of guided wave propagation in anchor rod was given.Then non-contact method for generating and receiving the guided waves was discussed.A prototype of experimental system was developed and detection signal were treated and analyzed by several signal processing methods.The experimental results show that the method of magnetostrictive guided wave anchor rod detection is feasible and reliable.