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工程设计学报
Chinese Journal of Engineering Design  2010, Vol. 17 Issue (6): 459-463    DOI:
    
Design of a new rockbolt testing method based on magnetostriction guided wave technique
 LV  Fu-Zai1 , WANG   Fei1, XIANG  Yi-Qiang2, TANG  Zhi-Feng3, ZHU   Ran1
1. Institute of Modern Manufacture Engineering, Zhejiang University, Hangzhou 310027, China;
2. Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China;
3. Institute of Advanced Digital Technologies and Instrumentation, Zhejiang University, Hangzhou 310027, China
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Abstract  Traditional rockbolt testing methods have problems of destruction to the rockbolt, complex testing process and low detection accuracy. In view of those problems, a new nondestructive testing method based on magnetostriction guided wave was proposed. On the basis of studying the magnetostriction guided wave theory and the characteristics of guided wave in rockbolts, a testing system was developed. Guided waves of  L(0,1) mode were excited in rockbolts by the testing system. Experiments of detecting the length and defects of rockbolts in the air and concret were completed. Nondestructive testing of rockbolts was realized with characteristics of no couplant require. The results indicate that this method can be used in the actual rockbolt testing work to detect free or buried rockbolts with characteristics of high detection accuracy and simple testing process．

Key words： magnetostriction      guided wave      rockbolt      nondestructive testing(NDT)     
Published: 28 December 2010
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LV Fu-Zai
WANG Fei
XIANG Yi-Qiang
TANG Zhi-Feng
ZHU Ran
Cite this article:

LV Fu-Zai , WANG Fei, XIANG Yi-Qiang, TANG Zhi-Feng, ZHU Ran. Design of a new rockbolt testing method based on magnetostriction guided wave technique. Chinese Journal of Engineering Design, 2010, 17(6): 459-463.

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https://www.zjujournals.com/gcsjxb/     OR     https://www.zjujournals.com/gcsjxb/Y2010/V17/I6/459


基于磁致伸缩导波技术的锚杆新型检测方法设计

针对现有锚杆质量检测方法存在检测具有破坏性、检测过程复杂、检测精度不高等问题,提出一种基于磁致伸缩导波技术的锚杆无损检测新方法.在研究磁致伸缩导波检测原理以及锚杆中导波特性的基础上,研制了锚杆检测系统,并利用该系统在锚杆中激励出L(0,1)模态导波,完成了空气中以及混凝土结构中锚杆长度以及缺陷的检测实验,实现了对锚杆的非接触式无损检测.结果表明：该方法检测过程简单、检测精度高，能检测具有隐蔽性的锚杆等,可以实际应用在锚杆质量检测中.

关键词： 磁致伸缩,  导波,  锚杆,  无损检测 
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