Journal Article


S. E. Taylor
C. Doherty
Eugene J. O'Brien
Ciaran Carey
T. Ojio



light emitting diodes deflection wim bridge weigh in motion contactless united kingdom bridge image

Contactless Bridge Weigh-in-Motion (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.
Collections Ireland -> University College Dublin -> Civil Engineering Research Collection

Full list of authors on original publication

S. E. Taylor, C. Doherty, Eugene J. O'Brien, Ciaran Carey, T. Ojio

Experts in our system

Su E. Taylor
University College Dublin
Total Publications: 5
Eugene J. O'Brien
University College Dublin
Total Publications: 192
Ciaran Carey
University College Dublin
Total Publications: 4