Abstract
We develop and build a new type of inspection car. A beam that is not rigidly
connected to the train axle boxes and can absorb the vibration and impact caused by
the high speed train is used, and a laser-camera measurement system based on the
machine vision method is adopted. This method projects structural light onto the
track and measures gauge and longitudinal irregularity. The measurement principle
and model are discussed. Through numerous practical experiments, the rebuilt car is
found to considerably eliminate the measurement errors caused by vibration and
impact, thereby increasing measurement stability under high speeds. This new kind of
inspection cars have been used in several Chinese administration bureaus.
© 2011 Chinese Optics Letters
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