A monitoring method for car-body vibration displacement of a high-speed train in windy conditions

The long-term monitoring of car-body vibration displacement when a high-speed train passes through complex terrain sections in windy conditions has become an urgent engineering problem in China. However, few studies have focused on this topic, and an effective engineering long-term monitoring method is lacking in China. In this study, by combining the vibration characteristics and structural characteristics of railway vehicles, a real-time car-body displacement monitoring method to fulfill monitoring requirements was proposed, and a mathematical computational model based on space coordinate transformations to calculate the car-body displacements in operation was developed. Moreover, the comparison and the verification of the monitoring system accuracy were conducted using full-scale tests. The results showed that the displacement of the car-body relative to the bogie frame obtained through the system was consistent with the real vibration state of the car-body. Therefore, our monitoring system was reliable in reflecting the car-body vibration displacement changes in high-speed trains that were in motion.

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A Bridge Deflection Monitoring System Based on CCD

Advances in Materials Science and Engineering ◽

10.1155/2016/4857373 ◽

2016 ◽

Vol 2016 ◽

pp. 1-11 ◽

Cited By ~ 8

Author(s):

Baohua Shan ◽

Lei Wang ◽

Xiaoyang Huo ◽

Wenting Yuan ◽

Zhilin Xue

Keyword(s):

Monitoring System ◽

Data Storage ◽

Ccd Cameras ◽

Monitoring Method ◽

Calibration Algorithm ◽

Scale Calibration ◽

Long Term Monitoring ◽

Cloverleaf Junction ◽

Term Monitoring

For long-term monitoring of the midspan deflection of Songjiazhuang cloverleaf junction on 309 national roads in Zibo city, this paper proposes Zhang’s calibration-based DIC deflection monitoring method. CCD cameras are used to track the change of targets’ position, Zhang’s calibration algorithm is introduced to acquire the intrinsic and extrinsic parameters of CCD cameras, and the DIC method is combined with Zhang’s calibration algorithm to measure bridge deflection. The comparative test between Zhang’s calibration and scale calibration is conducted in lab, and experimental results indicate that the proposed method has higher precision. According to the deflection monitoring scheme, the deflection monitoring software for Songjiazhuang cloverleaf junction is developed by MATLAB, and a 4-channel CCD deflection monitoring system for Songjiazhuang cloverleaf junction is integrated in this paper. This deflection monitoring system includes functions such as image preview, simultaneous collection, camera calibration, deflection display, and data storage. In situ deflection curves show a consistent trend; this suggests that the proposed method is reliable and is suitable for the long-term monitoring of bridge deflection.

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The Design of Densely Measured Points Long-Term Monitoring System Based on Wireless Sensor Network

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.594-597.1123 ◽

2012 ◽

Vol 594-597 ◽

pp. 1123-1127

Author(s):

Xiang Cheng ◽

Zhan Hui Liu ◽

Wei Cheng Gao

Keyword(s):

Wireless Sensor Network ◽

Sensor Network ◽

Monitoring System ◽

Health Monitoring ◽

Wireless Sensor ◽

Monitoring Method ◽

Technology Application ◽

Long Term Monitoring ◽

Term Monitoring

The wireless sensor network is a highly active area of research. Much progress has been made in wireless sensor network research for structural monitoring, but the research of the long-term monitoring system based on wireless sensor network in civil engineering structures is still at the beginning stage. The paper proposed to use wireless sensor network to realize intensive measurement long-term monitoring, in order to improve the effect of structural health monitoring. It introduced the characteristics and deficiencies of the wireless technology application in the structure health monitoring system, and proposed the system design principle of the densely measured points long-term monitoring system based on wireless sensor network. We has carried on the detailed argumentation and design from system architecture, the terminal node, monitoring method three aspects, and put forward a set of solutions.

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