Patent ID: 7668692
Filing Date: 2010-02-23
Classification: G01G

Abstract:
1. A method for determining weight of a vehicle moving on a bridge, said bridge having a pavement with an accessible lower surface, said method comprising; directly coupling downwardly travelling low frequency pavement vibrations generated by one or more wheels of said vehicle moving on said pavement, said body waves propagating generally downward through said pavement to at least one discrete location vibration sensor responsive to said downwardly travelling low frequency pavement vibrations, said at least one discrete location vibration sensor directly mounted to said lower surface of said pavement generally underneath a lane traveled by said vehicle, using said at least one discrete location vibration sensor to sense said downwardly travelling low frequency pavement vibrations generated by wheels of said vehicle moving on said pavement computing weight of said vehicle comprising using sensed said downwardly travelling low frequency pavement vibrations wherein the low frequency vibration are in a range of about 0.5 to 100 Hz.