The temporal-spatial focusing effect of the time-reversal method on the guided wave inspection in pipes was investigated theoretically in the current research with a transfer function. The amplitude of the time-reversed wave propagating along the pipes was not only determined by the characteristics of the defect and the location for observation but also by the location of the time-reversal transducers. Especially, the quantity of transducers distributed around the pipe in the circumferential direction was found to be important in applying such time-reversal method. The results demonstrate that the time-reversal method can be used to enhance the inspection energy for the guided wave inspection in pipes and to locate the defects in the circumferential directions. Once the time-reversed signals obtained from the guided wave inspection are applied on a numerical model, the defects can be recognized by the motion of the time-reversed wave transmitting along the pipe model. Numerical simulation and experimental results are provided in this paper to illustrate the validity of such defect-identifying method.
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A Time-Reversal Defect-Identifying Method for Guided Wave Inspection in Pipes
Fei Deng,
Fei Deng
College of Mechanical Engineering and Applied Electronic Technology,
Beijing University of Technology
, 100 Ping Le Yuan, Chaoyang District, Beijing, 100022, P.R.C.
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Bin Wu,
Bin Wu
College of Mechanical Engineering and Applied Electronic Technology,
e-mail: wb@emails.bjut.edu.cn
Beijing University of Technology
, 100 Ping Le Yuan, Chaoyang District, Beijing, 100022, P.R.C.
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Cunfu He
Cunfu He
College of Mechanical Engineering and Applied Electronic Technology,
Beijing University of Technology
, 100 Ping Le Yuan, Chaoyang District, Beijing, 100022, P.R.C.
Search for other works by this author on:
Fei Deng
College of Mechanical Engineering and Applied Electronic Technology,
Beijing University of Technology
, 100 Ping Le Yuan, Chaoyang District, Beijing, 100022, P.R.C.
Bin Wu
College of Mechanical Engineering and Applied Electronic Technology,
Beijing University of Technology
, 100 Ping Le Yuan, Chaoyang District, Beijing, 100022, P.R.C.e-mail: wb@emails.bjut.edu.cn
Cunfu He
College of Mechanical Engineering and Applied Electronic Technology,
Beijing University of Technology
, 100 Ping Le Yuan, Chaoyang District, Beijing, 100022, P.R.C.J. Pressure Vessel Technol. May 2008, 130(2): 021503 (8 pages)
Published Online: May 13, 2008
Article history
Received:
January 18, 2007
Revised:
November 20, 2007
Published:
May 13, 2008
Citation
Deng, F., Wu, B., and He, C. (May 13, 2008). "A Time-Reversal Defect-Identifying Method for Guided Wave Inspection in Pipes." ASME. J. Pressure Vessel Technol. May 2008; 130(2): 021503. https://doi.org/10.1115/1.2892029
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