{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:36:21Z","timestamp":1760236581268,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2021,12,3]],"date-time":"2021-12-03T00:00:00Z","timestamp":1638489600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"the National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11202137"],"award-info":[{"award-number":["11202137"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Shanghai Alliance Program","award":["2019025"],"award-info":[{"award-number":["2019025"]}]},{"name":"Collaborative innovation fund of Shanghai Institute of Technology","award":["XTCX2018-11"],"award-info":[{"award-number":["XTCX2018-11"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Ultrasonic guided waves are sensitive to many different types of defects and have been studied for defect recognition in rail. However, most fault recognition algorithms need to extract features from the time domain, frequency domain, or time-frequency domain based on experience or professional knowledge. This paper proposes a new method for identifying many different types of rail defects. The segment principal components analysis (S-PCA) is developed to extract characteristics from signals collected by sensors located at different positions. Then, the Support Vector Machine (SVM) model is used to identify different defects depending on the features extracted. Combining simulations and experiments of the rails with different kinds of defects are established to verify the effectiveness of the proposed defect identification techniques, such as crack, corrosion, and transverse crack under the shelling. There are nine channels of the excitation-reception to acquire guided wave detection signals. The results show that the defect classification accuracy rates are 96.29% and 96.15% for combining multiple signals, such as the method of single-point excitation and multi-point reception, or the method of multi-point excitation and reception at a single point.<\/jats:p>","DOI":"10.3390\/s21238108","type":"journal-article","created":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T03:10:38Z","timestamp":1638760238000},"page":"8108","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["An Intelligence Method for Recognizing Multiple Defects in Rail"],"prefix":"10.3390","volume":"21","author":[{"given":"Fei","family":"Deng","sequence":"first","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shang Hai Institute of Technology, Shanghai 201418, China"}]},{"given":"Shu-Qing","family":"Li","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shang Hai Institute of Technology, Shanghai 201418, China"}]},{"given":"Xi-Ran","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shang Hai Institute of Technology, Shanghai 201418, China"}]},{"given":"Lin","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shang Hai Institute of Technology, Shanghai 201418, China"}]},{"given":"Ji-Bing","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shang Hai Institute of Technology, Shanghai 201418, China"}]},{"given":"Cheng","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering, Shang Hai Institute of Technology, Shanghai 201418, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,3]]},"reference":[{"key":"ref_1","first-page":"1763","article-title":"Summary of inspection and monitoring technology for railway rail defects and damage","volume":"37","author":"Tian","year":"2016","journal-title":"Chin. 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