Online Surface Settlement Monitoring System of Ballastless Track with Difference Image Style

Abstract

In order to achieve the online surface settlement monitoring of ballastless track,an online surface settlement monitoring system with difference image type has been established, of which the components, the preprocessing measures of images, the precise positioning methods of laser spot have also been researched. The device mainly contains a dot laser and a point-position measurement device that uses a CCD to detect the position change of the laser spot image. Any position change of the dot laser can be measured and the settlement for one point can be obtained remotely. The multi-point settlements can be obtained by using a series of such devices. Some methods such as automatic background sub-tractions and high-precision method for locating the centers of laser spots have been adopted to enhance the stability, adaptability and accuracy of the measurement system. The device has been used in some railway sites and it has the advantages of high accuracy, low-cost and easy installation.

Application of Run Length Encoding In Track Vision Inspection System

“…As the image data is a huge amount of information, speeding of the image processing algorithm was the key of the detection performance of the whole system. Image preprocessing was used for inhibiting invalidity information, enhancing effective features, which occupied most of the frame processing time and operational memory [3] . So the key to improve the image processing speed was the optimization of image preprocessing.…”