Research On A Novel Train Positioning Method
With A Single Image
Author(s)
B. Guo, T. Tang & Z. Yu
Abstract
Comprehensive train monitoring is an important infrastructure detecting facility
that ensures normal operation of the high-speed railway. An accurate position is
the basis of precise detection. A research on the autonomous train location
method is of great theoretical and practical significance for the positioning of
comprehensive monitoring train and enhancing the infrastructure detecting level
of the existing line. Comprehensive train monitoring synchronizes all diagnosis
parameters by sharing time and position. However, it cannot correct the
odometer’s accumulative error with the track circuit’s insulator in high-speed
railways. This paper presents a novel position correction method with a single
image. It analyses the three dimensional (3D) camera projection model and its
disadvantage. A simplification from the 3D to the one dimensional (1D) model is
proposed. The actual distance between the landmark and the camera optical
center is calculated with image coordinates of the landmark acquired by the
camera fixed on top of the train. Then, the actual position of the train can be
calculated with the pre-stored landmark position and the calculated distance.
Both academic and experimental errors indicate that the position correction
method with a single image can satisfy the train positioning requirement.
Keywords: train position, single image, projection model, one dimension
simplification, landmark.
Keywords
train position, single image, projection model, one dimensionsimplification, landmark
Related Book
Other papers in this volume
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