Increased traffic speeds and axle loads on modern railways enhance rail track degradation. To eliminate track failure due to rail defects, a condition monitoring system requires methods for the early detection of defects which grow in service. Acoustic emission (AE) monitoring is the only non-destructive technique which might be applied online to study the defect growth under traffic loading. H...

Surface analysis is a very important measurement for track maintenance for Railroad Tracks, because deviations in surface geometry indicate where potential defects may exist. A rail surface defects inspection method based on computer vision system is proposed in the paper. Various algorithms related denoising, filtering, thresholding; segmentation and feature extraction are applied for processi...

of the Complementary Metal Oxide Semiconductor (CMOS), realized that a CMOS circuit does not consume current under a steady state operation. This is because there is no direct path from the supply rail (VDD) to the ground rail (VSS). The two complementary transistors operate in such a way that they are never simultaneously ON, except for a brief period during switching. Thus, static power consu...

Since its early days the development of railway systems has been an important driving force for technological progress. From the 1840s onward a dense railroad network was spread all over the world. Within a few decades railway became the predominant traffic system carrying a steadily increasing volume of goods and number of passengers. This rapid development was accompanied by substantial devel...

Trains are used as the fastest mode of transportation for both people and cargo. The train moves along a special path called “rail”, where fatigue can be accumulated due to wheel-rail contact load result continuous operation. Consistent regularly scheduled safety management is required since corrosion rate rails located on outside environment very high. Researchers have actively investigated de...

As the operational time of railway increases, rail surfaces undergo irreversible defects. Once defects occur, it is easy for them to develop rapidly, which seriously threatens safe operation trains. Therefore, accurate and rapid detection surface very important. However, in defects, there are problems, such as low contrast between background, large scale differences, insufficient training sampl...