|
|
|
| Phase characteristic analysis and experimental study on the guidedwave reflected from expressway guardrail posts |
| LIU Weixu1,TANG Zhifeng2,Lü Fuzai3,QIAO Yinhu1,ZHANG Chunyun1 |
1.College of Mechanical Engineering，Anhui Science and Technology University,Chuzhou 233100,China;
2.Institute of Advanced Digital Technologies and Instrumentation,Zhejiang University,Hangzhou 310027,China;
3.Institute of Modern Manufacture Engineering,Zhejiang University,Hangzhou 310027,China |
|
|
|
Abstract In order to identify automatically the guided wave signal reflected from the end of an expressway guardrail post and further inspect the buried depth of the guardrail post,the phase characteristic of the guided wave at the end of the guardrail post was analyzed and investigated.It is concluded that the echo signal from the end face has the characteristic of reverse-phase with the excitation pulse signal through deducing and calculating the reflection coefficient.The simulation signals obtained by the finite element simulation software of ABAQUS and the measured signals of the guided wave were decomposed sparsely by using a matching pursuit algorithm based on Gabor dictionary respectively,then the phase characteristic of the echo signals were verified by the phase parameters of matching atoms.The measured signals were collected by detecting identify buried and free guardrail posts using T (0,1) mode guided wave with the frequency of 64 kHz and 128 kHz,respectively.The experimental results of the simulated and measured signals are in good agreement with those of the theoretical analysis.The phase characteristic analysis of the echo signal provides a new way to the signal processing in guided wave detections.
|
|
Received: 29 September 2015
Published: 15 March 2017
|
|
|
|
[1] 何存富, 王学浦, 王秀彦,等. 基于导波技术的高速公路护栏立柱埋深检测[J]. 中国公路学报, 2008, 21(6): 37-42.
HE Cun-fu, WANG Xue-pu, WANG Xiu-yan, et al. Inspection of Expressway Guardrail Post Length Partly Embedded in Soil Based on Ultrasonic Guided Wave Technology[J]. China Journal of Highway and Transport, 2008, 21(6): 37-42.
[2] 贾志绚, 张潇, 赵星,等. 基于弹性波法的公路护栏立柱埋深无损检测技术及影响因素研究[J]. 北京工业大学学报, 2012(6):870-874.
JIA Zhi-xuan, ZHANG Xiao, ZHAO Xing, et al. Research on Influence Factors and NDT Technology of Expressway Barrier Post Embedded Depth in Soil Based on the Elastic Wave Technique[J].Journal of Beijing university of technology, 2012(6):870-874.
[3]龚廉溟, 胡富翔, 曹德洪, 等. 高速公路护栏立柱超声导波检测专用传感器夹具研制[J]. 公路, 2010 (9): 212-214.
GONG Lian-ming, HU Fu-xiang, CAO Dehong, et al. The special ultrasonic guided wave inspection sensor fixture development of highway guardrail post [J].Highway, 2010 (9): 212-214 (in Chinese).
[4] Alleyne D N, Pavlakovic B, Lowe M J S, et al. Rapid, long range inspection of chemical plant pipework using guided waves[C]//Key Engineering Materials. 2004, 270: 434-441.
[5] Cawley P, Cegla F, Galvagni A. Guided waves for NDT and permanently-installed monitoring[J]. Insight-Non-Destructive Testing and Condition Monitoring, 2012, 54(11): 594-601.
[6] Mallat S G, Zhang Z. Matching pursuits with
time-frequency dictionaries[J]. Signal Processing, IEEE Transactions on, 1993, 41(12): 3397-3415.
[7] Choi M S, Kim S Y, Kwun H, et al. Transmission line model for simulation of guided-wave defect signals in piping[J]. Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on, 2004, 51(5): 640-643.
[8] JTG/T D81－2006. 公路交通安全设施设计技术细则[S]. 北京：交通部公路科学研究院，2006.
JTG/T D81－2006. Highway Traffic Safety Facilities Design Rules[S]. Beijing: Research institute of highway ministry of transport, 2006.
[9] Lowe M J S, Cawley P. Long range guided wave inspection usage–current commercial capabilities and research directions[R]. London: Department of Mechanical Engineering, Imperial College London, 2006.
[10] Rose J L, Cho Y, Avioli M J. Next generation guided wave health monitoring for long range inspection of pipes[J]. Journal of loss prevention in the process industries, 2009, 22(6): 1010-1015.
[11] User’s manual for MsS data analysis and reporting software for piping inspection (Version 2006) [K]. US: Southwest Research Institute, 2006：24-25.
[12] Kwun H, Kim S Y, Choi M S. Experimental comparison of analytical modeling of a guided-wave interaction with a notch in a pipe[J]. Journal of the Korean Physical Society, 2004, 45(2): 380-385.
[13] Kim S Y, Kwun H. Method for automatic differentiation of weld signals from defect signals in long-range guided-wave inspection using phase comparison[P]. US. Patent 7565252, 2009.
|
|
|
|
