Device and method for detecting wheel axles
First Claim
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1. A device for detecting a wheel axle of a vehicle on a roadway comprising:
- a light projector configured to operate according to the light-section procedure and emit at least one fan of light from a first location along a side of the roadway to project a line of light onto the roadway and a vehicle located thereon;
a camera configured to record said line of light from a second location along the same side of the roadway; and
an evaluation unit coupled to the camera and configured to determine a course of the line of light from the second location and to detect the wheel axle of the vehicle when the recorded line of light from the second location exhibits, in its course emanating from said side of the roadway, a shift-free change in direction differing from a reference course when the roadway is empty.
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Abstract
The invention relates to the detection of wheel axles of a vehicle on a roadway by means of a sensor, which operates according to the light-section procedure and emits at least one fan of light from a first location along the roadway to project a line of light onto the roadway and a vehicle possibly located thereon, and records this line of light from a second location along the same side of the roadway and detects a wheel axle as soon as the recorded line of light exhibits, in its course emanating from the said side of the roadway, a shift-free change in direction differing from its course when the roadway is empty.
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Citations
12 Claims
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1. A device for detecting a wheel axle of a vehicle on a roadway comprising:
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a light projector configured to operate according to the light-section procedure and emit at least one fan of light from a first location along a side of the roadway to project a line of light onto the roadway and a vehicle located thereon; a camera configured to record said line of light from a second location along the same side of the roadway; and an evaluation unit coupled to the camera and configured to determine a course of the line of light from the second location and to detect the wheel axle of the vehicle when the recorded line of light from the second location exhibits, in its course emanating from said side of the roadway, a shift-free change in direction differing from a reference course when the roadway is empty. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for detecting a wheel axle of a vehicle on a roadway, comprising:
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projecting at least one fan of light from a first location along a side of the roadway to project a line of light onto the roadway and a vehicle located thereon; recording the line of light from a second location along the same side of the roadway; and detecting the wheel axle when the recorded line of light exhibits a shift-free change in a direction differing from a reference course when the roadway is empty. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification