Method and Device for Determining the Speed of Travel and Coordinates of Vehicles and Subsequently Identifying Same and Automatically Recording Road Traffic Offences

  • US 20130038681A1
  • Filed: 08/08/2012
  • Published: 02/14/2013
  • Est. Priority Date: 02/08/2010
  • Status: Active Grant
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A method for determining the speed and coordinates of vehicles that involves emitting electromagnetic pulses in the direction of vehicles moving along a road section, receiving the pulses reflected from vehicles, calculating the distance and speed of the vehicles through a comparison of the parameters of emitted and received pulses and a comparison of the measured vehicle speed with the maximum allowed speed in the given road section and, in case of a speed violation, generating subsequently a signal to recognize the registration (license) plate of the speed-violating vehicle through the use of a license plate recognition video camera, providing vehicle identification and automatic recording of speed violations, the proposed method is different from other methods in that the pulses are emitted by a radar simultaneously with video recording of the same road section by a panoramic video camera, which is calibrated so that the real coordinates of distances from the video camera to the corresponding sections on the road are assigned to each row element Yi and to each column element Xi of the video camera matrix. Moreover, the distances and speeds of all the vehicles, which are at the moment within the selected road section hundreds of meters long, are calculated from signals received by the radar;

  • independently and simultaneously, using a picture captured by the panoramic video camera the coordinates and speeds of the same vehicles, which are in the snapshot, are calculated, whereupon the data streams from the radar and video camera containing the speeds and coordinates of all the vehicles, which are at the moment within the selected road section, are compared, moreover, the data received from the radar are taken to be reliable metrological data on the speeds and coordinates Yi of the vehicles, while the data received from the panoramic video camera are considered to be reliable metrological data on the coordinates Xi of the same vehicles;

    each vehicle violating the speed limit is subsequently monitored until the license plate is recognized, then a license plate recognition video camera generates an image frame of the violating vehicle, which contains the recognized license plate, date, time, recorded speed and video camera identifier, thus allowing automatic recording of traffic violations.

View all claims

    Thank you for your feedback