Contactless Bridge Weigh-in-Motion
|Title:||Contactless Bridge Weigh-in-Motion||Authors:||Ojio, T.
O'Brien, Eugene J.
Taylor, Su E.
|Permanent link:||http://hdl.handle.net/10197/8045||Date:||Jul-2016||Abstract:||Bridge weigh-in-motion (WIM) uses existing bridges to find the weights of vehicles that pass overhead. Contactless bridge weigh-in-motion (cBWIM) uses bridges to weigh vehicles without the need for any sensors to be attached to the bridge. A camera is mounted on the back of a telescope, which magnifies the image to the extent that submillimeter bridge deflections can be measured accurately. A second camera is used to monitor traffic and to determine axle spacings. The two cameras are synchronized using light-emitting diodes (LEDs) activated by an interval timer. The exact position of the test vehicle relative to the bridge influence line is determined by optimization at a post-processing stage. The new WIM concept was tested on a bridge in the United Kingdom. In a modest test sample of eight statically weighed vehicles, cBWIM was shown to be a feasible alternative to other forms of WIM. Accuracy of gross weight is already reasonably good; accuracy of groups and individual axles will require greater magnification or additional cameras.||Funding Details:||Irish Research Council
Science Foundation Ireland
|Type of material:||Journal Article||Publisher:||American Society of Civil Engineers||Copyright (published version):||2016 ASCE||Keywords:||Bridge;WIM;Contactless;Deflection;Image||DOI:||10.1061/(ASCE)BE.1943-5592.0000776||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Civil Engineering Research Collection|
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