초록 ▼

An apparatus and method for converting in-ground static weighing scales for vehicles to weigh-in-motion systems. The apparatus upon conversion includes the existing in-ground static scale, peripheral switches and an electronic module for automatic computation of the weight. By monitoring the velocit

An apparatus and method for converting in-ground static weighing scales for vehicles to weigh-in-motion systems. The apparatus upon conversion includes the existing in-ground static scale, peripheral switches and an electronic module for automatic computation of the weight. By monitoring the velocity, tire position, axle spacing, and real time output from existing static scales as a vehicle drives over the scales, the system determines when an axle of a vehicle is on the scale at a given time, monitors the combined weight output from any given axle combination on the scale(s) at any given time, and from these measurements automatically computes the weight of each individual axle and gross vehicle weight by an integration, integration approximation, and/or signal averaging technique.

대표청구항 ▼

1. A method for determining the total weight of a vehicle moving atop a weight scale comprising the steps of:A) providing a weight scale of sufficient length that multiple axle sets of a vehicle can be located on said scale simultaneously; B) determining at a predetermined data rate the velocity of

1. A method for determining the total weight of a vehicle moving atop a weight scale comprising the steps of:A) providing a weight scale of sufficient length that multiple axle sets of a vehicle can be located on said scale simultaneously; B) determining at a predetermined data rate the velocity of said vehicle at a plurality of discrete points in time beginning at the point in time when a first tire of said vehicle enters said scale until a point in time when a last tire of said vehicle exits said scale; C) sensing and recording the position of said axle sets at a plurality of locations on said weight sensor within the period of time that said vehicle is on said scale; D) determining the instantaneous weight of said vehicle at each of said plurality of discrete points in time; E) summing the products of the determined velocity and the determined instantaneous weight at each of said plurality of discrete points in time; F) normalizing by dividing the result of the preceding step by said predetermined data rate; and G) multiplying the result obtained in the preceding step by a calibration constant to determine vehicle weight.