Design and application of real-time monitoring system for service status of continuously welded turnout on the high-speed railway bridge. Issue 7 (16th June 2021)

• Record Type: Journal Article
• Authors: Cai, Xiaopei; Chang, Wenhao; Gao, Liang; Zhou, Chenyi
• Is Part Of: Journal of transportation safety & security. Volume 13:Issue 7(2021)
• Page Start: 735
• Page End: 758
• Publication Date: 2021-06-16
• Subjects: high-speed railway -- bridge -- continuously welded turnout (CWT) -- monitoring system -- fiber Bragg grating (FBG); Transportation -- United States -- Safety measures -- Periodicals; Transportation -- Security measures -- United States -- Periodicals; Transportation -- Safety measures; Transportation -- Security measures; United States; Periodicals; 353.9805
• DOI: 10.1080/19439962.2019.1673858
• Languages: English
• ISSNs: 1943-9970

Abstract

Abstract: A turnout is a key piece of equipment and one of the weakest links of the railway infrastructures. Continuously welded turnouts (CWTs) have been widely laid on high-speed railway bridges because of the topographic and environmental limitations, where special attention is required to ensure the safety of the high-speed railways. A real-time monitoring system will be interesting for the service status of the CWT on the bridge, which was designed and established for the first time in China. Real-time data of the service status indicators were obtained by fiber grating and video perception technologies. The data features of the monitoring results were analyzed. A regression model and backpropagation neural network model were adopted to predict the key indicators. An alarm mechanism with a static threshold and outlier diagnosis was established. The monitoring system has been in good operation state for more than 4 years, effectively ensuring railway safety and security.