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Field Test Performance of Noncontact Ultrasonic Rail Inspection System
| 题名： | Field Test Performance of Noncontact Ultrasonic Rail Inspection System |
| 其他题名： | Alers,G.A.(1988)."Railroad rail flaw detection system based on electromagnetic acoustic transducers."OTIFRA/ORD-88/09,U.S.Dept.of Transportation,Washington,DC. |
| 正文语种： | 英文 |
| 作者： | Stefano Mariani |
| 关键词： | Rail inspection;Rail defect detection;Receiver operating characteristic curves;Electrical impedance matching |
| 摘要： | This paper presents the latest results from a noncontact ultrasonic rail inspection system developed at the University of California, San Diego (UCSD) under the auspices of the Federal Railroad Administration. Noncontact rail probing is an attractive feature that could potentially allow for new possibilities. The UCSD system utilizes a focused air-coupled transmitter, symmetrically placed air-coupled receivers, and a real-time statistical algorithm to maximize true outliers (defects) and minimize false positives. Two field tests were conducted at the Rail Defect Test Facility of the Transportation Technology Center in Pueblo, Colorado, at test speeds from 1.6 to 24 km=h (1 to 15 mi=h). The results of these tests, evaluated in terms of probability of detection versus probability of false alarms (receiver operating characteristic curves) indicate a good detection performance at the speeds of 1.6 and 8 km=h, with a much poorer performance at the speeds of 16 and 24 km=h. Possible reasons for the performance degradation at the higher speeds are discussed, and future work aimed at mitigating these issues is proposed. |
| 出版年： | 2017 |
| 论文唯一标识： | P-72Y2017V143N05004 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/JTEPBS.0000026 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 143 |
| 期： | 05 |
| 页码： | 24-37 |
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