System and Method For Speed Measurement Verification

  • US 20080266140A1
  • Filed: 03/03/2006
  • Published: 10/30/2008
  • Est. Priority Date: 03/03/2005
  • Status: Active Grant
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First Claim
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1. A system for speed measurement verification, which system includesmeasuring means configured to automatically measure the speed of a vehicle travelling on a surface which includes a fixed marker at a predetermined distance from a point where the speed of the vehicle is measured;

  • a camera for directing at said marker, in use; and

    a processor arranged in electronic communication with the measuring means and camera, which processor is configured to automatically compare the measured speed of the vehicle to a predetermined speed limit and, if the measured speed exceeds such a speed limit, to automatically calculate a time delay according to the measured speed and the predetermined distance so as to predict when the vehicle, if travelling at the measured speed, will reach the marker, the processor being further configured to activate the camera after expiration of said time delay so that, if the measured speed is accurate, the vehicle will be proximate the marker so that an image captured when the camera is activated by the processor will show the vehicle relative to the marker in order to verify the accuracy of the measured speed;

    wherein the measuring means includes an electromagnetic wave transmitter configured to automatically and sequentially transmit at least two pulsed electromagnetic waves having known velocities to the vehicle, and a receiver configured for automatically receiving the transmitted electromagnetic waves reflected from the vehicle, so that the processor is able to calculate the speed according to the flight time of the waves which have known velocities; and

    wherein the measuring means is configured to measure the distance of the vehicle to the measuring means to determine the distance of the point where the speed of the vehicle is measured to the marker.

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