Research On Rail Head Wear Detection And Data Transmission Technology

The Rail profile detection system is the core part of the "Automatic on-line detecting and reparative grinding equipment for rail wear." It is the detecting front end of the whole system and it has a very important position in the system.The precise rail profile detection and data transmission system are the key contents in the field of rail wear and repair.This paper is mainly working on the rail-profile detection subsystem and the 4G wireless data communication terminal subsystem.Rail profile detection subsystem based on machine vision technology.Using CCD and linear-laser source matched method,extract the laser band on the surface of the rail-head.An image preprocessing software is designed to realize the image transformation from the original laser-band to the single-pixel wide rail profile.Based on the rail profile image,studies the extraction method and the matching rule of the rail profile's feature area,it realizes the precise match between the measured rail profile and the standard rail profile and it calculates the rail wear.This paper develops the wireless communication subsystem,based on the technology of embedded system and 4G communication.On the basis of that,this paper designs a method of image coding and decoding,which realizes the efficient and lossless transmission of rail profile information.Finally,this paper preform a function test.The test results show that the system has realized the basic functions of rail profile detection,wireless data transmission and rail profile data processing.The software and hardware platform for rail profile detection and data transmission has been established.