Detection Of Railway Track Parameters And Their Data Processing Technology Research

With the development of Chinese high-speed and heavy-haulrailway transportation, the track structure is more important. Reinforcingtrack parameter detection has far-reaching significance to themodernization of railway construction. In this paper, based on computertechnologies and design principle of intelligent instruments, a portableintelligent track parameter detection system with high precision isdesigned.Based on the analysis of system principle and the design of thehardware circuits, the pattern search method combined with the segmentcalibration is applied to fit a working line for a backset sensor, whichimproves sensor non-linearity from 1％to 0.1％. Therefore, ahigh-accuracy measurement is carried out with medium precision sensors,which can reduce greatly the cost of system design. By the datapreprocessing algorithms, the effects of railway welding line, staggerteeth and abrasion to detection precision can be eliminated.To calculate a certain chord of track smooth and rough value, thesuperposition, total angle rotation and coordinate rotation mathematicalmodels are set up, and the models are compared from the aspects ofdetection precision and the application background. Based on the law oftrack linear variety, the mathematical model of the railway theoreticalvalue is established, and the formula of the track deviation value isderived. In the application of the tamp vehicle track-dialing, the approachof using system deviation to amend its rudimental warp is presented.In the track evaluation, in order to utlize the detection data, theapproach based on the power spectral density in the track evaluation isanalyzed. The detection system irregularity data sample is analyzed withthe improved cycle map estimation. From the power spectrum figure, thedistribution rule of the track irregularity amplitude and wavelength areclearly found out. With serial communication technologies, multithread programmingtechniques and COM technologies, the data processing software of thedetection system is developed. Some key problems are solved, such as thedata-read slow and screen flickered. The experiments results show thatthe system has many features, including high precision, goodrepeatability, and it can satisfy the requirements on the spot.