声频应力波实时检测分析仪

英文篇名：Real-Time Analysis System of Audio-Frequency Stress Wave
中文刊名：振动.测试与诊断
英文刊名：Journal of Vibration ; Measurement & Diagnosis
作者：罗明璋 ; 王军民 ; 徐菲 ; 张辉
英文作者：Luo Mingzhang1 ; 2 ; Wang Junmin2 ; Xu Fei2 ; Zhang Hui2(1.Electronics &Information School ; Yangtze University Jinzhou ; 434023 ; China)(2.Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education ; Yangtze University Jinzhou ; 434023 ; China)
中文关键词：声频应力波 ; 小波变换 ; Hilbert变换 ; 嵌入式
英文关键词：audio-frequency stress wave ; wavelet transform ; Hilbert transform ; embedded
出版日期：2012-04-15
机构：长江大学电子信息学院;长江大学油气资源与勘查技术教育部重点实验室;
年：2012
期：02
出版单位：振动.测试与诊断

摘要

针对目前国内桩基和锚杆质量检测仪的不足,采用CPLD+DSP+ARM硬件平台,对声频应力波信号进行24位/1M的浮点采集,应用小波变换和Hilbert变换对声频应力波信号实时处理,提取声频应力波的瞬时信息,实现快速、准确的无损检测,提高了现场测量的准确性和效率。通过高速公路上的锚杆质量检测,验证了该仪器性能。
According to the fact that the quality inspection of anchor and piles must satisfy the real-time demand,a FPGA + DSP + ARM real-time measurement system is proposed and designed.A theory based on wavelet transform and Hilbert transform is used to extract instantaneous phase of audio-frequency stress wave and improve the accuracy and efficiency of on-site measurements.Finally,analysis results of real-time measurements are given through the quality inspection of bolt on the highway.

引文

[1]王军民,陈义群,陈华.高速公路锚杆锚固质量检测技术研究[J].地球物理学进展,2004,19(4):782-785.Wang Junmin,Chen Yiqun,Chen Hua.Reseach onachor bar quality nondestructive testing tenique onhigh-way[J].Progress in Geophysics,2004,19(4):782-785.(in Chinese)
    [2]Zou D H,Cui Y,Madenga V,et al.Effects offrequency and grouted length on the behavior ofguided ult rasonic waves in rock bolts[J].International Journal of Rock Mechanics&MiningSciences,2007,44(6):813-819.
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    [4]Beard M D,Lowe M J S.Non-destructive testing ofrock bolts using guided ultrasonic waves[J].IntlJournal of Rock Mechanics&Mining Science,2003(40):527-536.
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