TESTING APPARATUS AND TESTING METHOD FOR A TRAFFIC MONITORING DEVICE WITH A LASER SCANNER
First Claim
1. Testing apparatus for a traffic monitoring device with a laser scanner, comprising an adjusting plate having a receiving place for receiving a traffic monitoring device which is to be tested, and a measuring board which is arranged at a fixed distance from the adjusting plate and which has a line pattern along an imaginary straight line with a plurality of vertical lines running perpendicular to the straight line and with a diagonal line, wherein the adjusting plate and the measuring board can be aligned relative to one another in such a way that the straight line lies in a reference scanning plane of the laser scanner, and the diagonal line intersects the straight line on a perpendicular center line of the measuring board, wherein said diagonal line forms an angle with the straight line, said angle being selected in such a way that laser pulses emitted by the laser scanner form at least three laser spots with a reference laser spot width and a reference laser spot length on said diagonal line.
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Accused Products
Abstract
A testing apparatus and a testing method for a traffic monitoring device with a laser scanner. The testing apparatus has an adjusting plate which provides a receiving place for receiving a traffic monitoring device which is to be tested and a measuring board. A line pattern along an imaginary straight line extending at the height of the reference scanning plane is provided on the measuring board which has a matte black surface. Vertical lines and a diagonal line are arranged on the straight line, and the diagonal line forms an angle with the straight line, which angle is selected in such a way that laser pulses emitted by the laser scanner form at least three laser spots with a reference laser spot width and a reference laser spot length on the diagonal line.
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Citations
10 Claims
- 1. Testing apparatus for a traffic monitoring device with a laser scanner, comprising an adjusting plate having a receiving place for receiving a traffic monitoring device which is to be tested, and a measuring board which is arranged at a fixed distance from the adjusting plate and which has a line pattern along an imaginary straight line with a plurality of vertical lines running perpendicular to the straight line and with a diagonal line, wherein the adjusting plate and the measuring board can be aligned relative to one another in such a way that the straight line lies in a reference scanning plane of the laser scanner, and the diagonal line intersects the straight line on a perpendicular center line of the measuring board, wherein said diagonal line forms an angle with the straight line, said angle being selected in such a way that laser pulses emitted by the laser scanner form at least three laser spots with a reference laser spot width and a reference laser spot length on said diagonal line.
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10. Testing method for a traffic monitoring device with a laser scanner, characterized in that a scanner-specific coordinate system of a traffic monitoring device and a measuring board with a line pattern along an imaginary straight line with a plurality of vertical lines running perpendicular to the straight line and a diagonal line which intersects the straight line on a perpendicular center line of the measuring board, wherein it forms an angle with the straight line, which angle is selected in such a way that at least three laser spots of laser pulses emitted by the laser scanner, which three laser spots have a reference laser spot width and a reference laser spot length, impinge on the diagonal line, are so aligned with respect to one another that the straight line lies in a reference scanning plane of the laser scanner, in that the laser scanner emits a laser beam with a plurality of laser pulses over a scanning angle region, which laser pulses impinge on the measuring board, where each of them forms one of the laser spots, and when impinging on the perpendicularly extending vertical lines and the diagonal line, the laser pulses are reflected in a receiver of the laser scanner, where there are generated receive signals having an amplitude, in that an actual quality curve of the amplitude over the scanning angle is formed from the values of the amplitude of the receive signals and is compared with a known reference quality curve in order to deduce the position of the actual scanning plane compared to the reference scanning plane.
Specification