A Non-contact Laser System for Geometric Parameters of Rail Track

Rail track geometric parameters, such as gage, level, longitudinal and alignment etc., have much influence on the operation safety of train vehicles. In this paper, a new measurement system for track geometric parameters is described. The measurement system is based on the three-point method for the straightness measurement, it uses laser sensor of displacement to collect data, uses notebook to process data, the whole measurement system is integrated in a portable measurement car