Method and device for the calibration of the position of the measurement, 2002, mounted on a gantry above a trackway

摘要

The present invention relates to a method of calibration of the position of the measuring equipment mounted on a gantry extending over a travel path, one of said measurement equipment being a camera (3) mounted on the frame so that the virtual line on the roadway, which corresponds to the input of a vehicle in its field of vision is situated at a distance (d) of the level of the gantry, the said distance (d) is used to match the results of measurement equipment. The process is characterized in that it comprises the following steps: - calculating an estimated (d, d) of the said distance (d) from the reading of the number plate (pi) of a vehicle (vi) on the one (i) of the images acquired by the camera (3) during the time when the vehicle (vi) passes through the field of vision of the camera (3), and - calculating an estimated average (d) of the said distance (d) by the average of several estimated (d, d) of the said distance (d) thus computed following the passage of a plurality of vehicles on the gantry.