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The objective of the digital imaging for condition asset management (DIFCAM) project was to show the feasibility of imaging and laser scanning based techniques for tunnel examination. This was successfully done by developing a demonstrator for monitoring the interior of rail tunnels, reducing or eliminating the need for track access and subjective human visual inspections. This is an example of a...
In this study, for realizing efficient condition monitoring of rail corrugation, we developed two measurement tools. One is the on-board monitoring device to detect the condition of rail corrugation that distributed on railway track on the commercial train. Another one is the trolley to measure the rail surface irregularity of the corrugated rail continuously in site. In addition, we propose the method...
An inertial measurement unit (IMU) comprising three accelerometers and three gyroscopes all of good quality, attached to the bogie of an in-service railway vehicle and suitably processed in conjunction with a tachometer signal and a GPS feed, tracks the location, orientation and trajectory of the bogie. Using this data, the condition of the track geometry can be assessed. By monitoring this data as...
This paper describes the development of a comprehensive multibody model of the twin disk test rig using the modular approach. The mathematical models for electrical and mechanical components and wheel and rail rollers are implemented using SimPowerSystems, SimDriveline and Simulink toolboxes. The static and dynamic responses of the rollers are measured with load cells and strain gauges. The experimental...
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