Methods of non-destructive rail analysis and evaluation for railroad tracks are provided. The methods can include capturing images of rails over time and at various temperatures. High-contrast patterns can be applied to or associated with a rail to facilitate image analysis. Rail neutral temperature (RNT), stress, strain, and curvature of the track can be determined using image correlation and regression analysis. A stereovision system may be used for rail neutral temperature measurements and for determining effects of a heating method. A non-contacting, nondestructive methodology for RNT and longitudinal rail stress measurements is based on stereo vision image acquisition and Digital Image Correlation (DIC) for acquiring the full field shape, deformation, and strain measurements taken during a thermal cycle. The thermal cycle can be natural or induced.
Non-contact methods of rail assessment for a railroad track
2024-05-28
Patent
Electronic Resource
English
IPC: | G01L Messen von Kraft, mechanischer Spannung, Drehmoment, Arbeit, mechanischer Leistung, mechanischem Wirkungsgrad oder des Drucks von Fluiden , MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE / B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen |
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