System and method for speed measurement verification
First Claim
1. A system for speed measurement verification, which system includesspeed measuring means configured to automatically measure the speed of a vehicle traveling 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 speed 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 to predict when the vehicle, if traveling 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 speed 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 speed measuring means is configured to measure the distance of the vehicle to the speed measuring means to determine the distance of the point where the speed of the vehicle is measured to the marker.
0 Assignments
0 Petitions
Accused Products
Abstract
This Invention provides for a method and system for speed measurement verification. The method comprises the step of automatically measuring the speed of a vehicle traveling on a surface which includes a fixed marker at a predetermined distance from a point where the speed of the vehicle is measured. The measured speed is automatically compared to a predetermined speed limit and if the speed limit is exceeded, the next step involves automatically calculating a time delay, which time delay is calculated according to the measured speed and the predetermined distance so as to predict when the vehicle, if traveling at the measured speed, will reach the marker. An image is then captured with a camera directed at the marker after expiration of the time delay so that, if the measured speed is accurate, the vehicle will be positioned proximate the marker so that the captured image showing the vehicle relative to the marker is able to serve as verification of the accuracy of the measured speed.
-
Citations
15 Claims
-
1. A system for speed measurement verification, which system includes
speed measuring means configured to automatically measure the speed of a vehicle traveling 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 speed 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 to predict when the vehicle, if traveling 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 speed 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; andwherein the speed measuring means is configured to measure the distance of the vehicle to the speed measuring means to determine the distance of the point where the speed of the vehicle is measured to the marker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method for speed measurement verification, which method includes the following steps
automatically measuring the speed and distance of a vehicle traveling on a surface which includes a fixed marker at a predetermined distance from a point where the speed of the vehicle is measured; -
automatically comparing the measured speed of the vehicle to a predetermined speed limit; automatically calculating a time delay if the measured speed exceeds the speed limit, which time delay is calculated according to the measured speed and the predetermined distance to predict when the vehicle, if traveling at the measured speed, will reach the marker; and automatically capturing an image with a camera directed at the marker after expiration of the time delay so that, if the measured speed is accurate, the vehicle will be positioned proximate the marker so that the captured image showing the vehicle relative to the marker is able to serve as verification of the accuracy of the measured speed; wherein the step of automatically measuring the speed of the vehicle traveling on the surface includes determining a change in distance of the vehicle from a stationary transmitter which sequentially transmits at least two pulsed electromagnetic waves having known velocities to the vehicle so that a suitable receiver is able to receive the waves reflected from the vehicle, wherein the known velocity of a wave together with the time taken between transmission and reception of that wave enables the calculation of the distance from the transmitter to the vehicle, so that the speed of the vehicle is calculated by dividing the measured change in distance of the vehicle by a predetermined interval between the transmission of the separate waves to the vehicle; and
wherein the step of measuring the speed includes measuring the distance of the vehicle to suitable measuring means to determine the distance of the point where the speed of the vehicle is measured to the marker.- View Dependent Claims (14, 15)
-
Specification