In-Line Ultrasonic Monitoring for Sediments Stuck on Inner Wall of a Polyvinyl Chloride Pipe
http://www.hindawi.com/journals/tswj/2014/731621/
The Scientific World Journal
Volume 2014 (2014), Article ID 731621, 8 pages
http://dx.doi.org/10.1155/2014/731621
In-Line Ultrasonic Monitoring for Sediments Stuck on Inner Wall of a Polyvinyl Chloride Pipe
1Department of Mechanical Convergence Engineering, Hanyang University, Seoul 133-791, Republic of Korea
2School of Mechanical Engineering, Hanyang University, Seoul 133-791, Republic of Korea
Received 28 March 2014; Accepted 2 July 2014; Published 28 August 2014
Academic Editor: Ying Lei
Abstract
This research verified the applicability and effectiveness of the ultrasonic monitoring of sediments stuck on the inner wall of polyvinyl chloride (PVC) pipes. For identifying the transmittance of acoustic energy and the speed of sound in the PVC material, the pulse-echo ultrasonic testing was conducted for PVC sheets of different thicknesses. To simulate the solidified sediment, the hot melt adhesive (HMA) was covered on the inner wall of the PVC pipe in different heights. From the experiment, the speeds of sound in the PVC and the HMA materials were obtained as about 2258 and 2000 m/s, respectively. The thickness of the materials was calculated through the signal processing such as taking the absolute value and low pass filtering, the echo detection, and the measurement of the time of flight. The errors between actual and measured thicknesses of PVC sheets were below 5%. In the case of the substance stuck on the inner wall, the errors were below 2.5%. Since the pulse-echo ultrasonic inspection is available on the outer surface and its measurement accuracy was over 95%, it can be an efficient and effective in-service structural health monitoring for the sediment on the wall of PVC pipes.
- 한국도로공사 교통데이터 공모전 - 대한교통학회 회장상 수상 (김진수)
- 한국ITS학회 - 우수논문상
- 비파괴검사학회지 우수 논문상 (김정석, 남태형, 최성호, 장경영)
- 비파괴검사학회지 - 우수논문상
- 비파괴검사학회지 - 우수 논문상
- 대한기계학회 - 우수 학생 논문상
- Slip damage of silicon wafers subjected to continuous infrared laser irradiation
- Relative Measurement of the Acoustic Nonlinearity Parameter using Laser Detection of an Ultrasonic Wave
- Relationship between Second- and Third-order Acoustic Nonlinear Parameters in Relative Measurement
- Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy
- KSME-SEMES 오픈 이노베이션 챌린지 동상 수상 - 윤성희
- JMST - JMST Contribution Award