RDS Products & Systems
[2] Video Train Positioning System
VTPS is a software-based technology pioneered by RDS that uses proprietary image processing of video feed to provide real-time, track-precise positioning information not readily available from any other system.
How does VTPS work?
A forward-facing camera is mounted in the windscreen of the train cab, and VTPS carries out real-time image processing of the camera’s video output to determine the following:
Positioning measurement | How VTPS calculates it | Benefits of VTPS |
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Speed/distance |
VTPS correlates one video frame with the next to determine the speed and distance moved |
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Curvature |
Each video frame is correlated with the next to determine track curvature from sideways motion |
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Direction |
VTPS outputs a positive speed for forwards direction, negative for reverse |
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Track |
Image processing is used to identify tracks in the video feed |
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Sign reading |
VTPS has the capability to detect and read machine- and human-readable signs, and to determine distance from them |
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