Method and system for detecting with laser the passage by a vehicle of a point for monitoring on a road
First Claim
1. A method for detecting the passage of a vehicle past a determined point for monitoring a road, comprising transmitting at least one laser beam from a remotely situated location to the point for monitoring;
- receiving reflections from the at least one transmitted laser beam at the remotely situated location, and determining from the received reflections that the vehicle is passing the point for monitoring, where said laser beam is transmitted substantially continuously.
1 Assignment
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Accused Products
Abstract
The invention relates to a method for detecting the passage by a vehicle of a determined point for monitoring on a road, wherein from a remotely situated location a laser beam is transmitted continuously to the point for monitoring, reflections from the transmitted laser beam are received at the remotely situated location, and it is determined from the received reflections that the vehicle is passing the point for monitoring. The laser beam can be transmitted at right angles to the travel direction of the passing vehicle. The detection can be used to activate a red-light camera, to measure the speed of the vehicle or measure the traffic intensity, without sensors, for instance induction loops, having to be arranged in the road for this purpose. The invention further relates to a system for performing this method.
10 Citations
22 Claims
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1. A method for detecting the passage of a vehicle past a determined point for monitoring a road, comprising transmitting at least one laser beam from a remotely situated location to the point for monitoring;
- receiving reflections from the at least one transmitted laser beam at the remotely situated location, and determining from the received reflections that the vehicle is passing the point for monitoring, where said laser beam is transmitted substantially continuously.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
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10. The method of claim 10, wherein the transmitting and receiving location and the point for monitoring are such that each laser beam hits passing vehicles at a characteristic height.
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12. A detection system for detecting the passage of a vehicle past a determined point for monitoring a road, comprising a transmitting and receiving device disposed at a remote location for:
- (1) transmitting at least one laser beam substantially continuously to the point for monitoring, (2) receiving reflections from the at least one transmitted laser beam, and (3) determining from the received reflections that a vehicle is passing the point for monitoring.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification