Method and Device for Detecting a Rotating Wheel
First Claim
1. A method for detecting a rotating wheel of a vehicle that is travelling on a roadway in a travel direction, the wheels of which are at least partially exposed laterally, the method comprising:
- emitting an electromagnetic measurement beam having a known temporal progression of its frequency onto a first section above the roadway in a direction in a slant with respect to the vertical and normal or at a slant with respect to the travel direction;
receiving a reflected measurement beam and recording the temporal progression of its frequencies relative to the known progression as a reception frequency mixture progression; and
detecting a band of frequencies which is continuously inclining or declining over a period of time in the reception frequency mixture progression as a wheel.
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Abstract
A method is described for detecting a rotating wheel of a vehicle that is travelling on a roadway in a travel direction, the wheels of which are at least partially exposed laterally, the method comprising: emitting an electromagnetic measurement beam having a known temporal progression of its frequency onto a first section above the roadway in a direction in a slant with respect to the vertical and normally or at a slant with respect to the travel direction; receiving a reflected measurement beam and recording the temporal progression of its frequencies, relative to the known progression, as a reception frequency mixture progression; and detecting a frequency band, which is continuously inclining or declining over a period of time, in the reception frequency mixture progression as a wheel. A device for conducting the method is also described.
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Citations
20 Claims
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1. A method for detecting a rotating wheel of a vehicle that is travelling on a roadway in a travel direction, the wheels of which are at least partially exposed laterally, the method comprising:
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emitting an electromagnetic measurement beam having a known temporal progression of its frequency onto a first section above the roadway in a direction in a slant with respect to the vertical and normal or at a slant with respect to the travel direction; receiving a reflected measurement beam and recording the temporal progression of its frequencies relative to the known progression as a reception frequency mixture progression; and detecting a band of frequencies which is continuously inclining or declining over a period of time in the reception frequency mixture progression as a wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20)
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11. An apparatus for detecting a rotating wheel of a vehicle, that is travelling on a roadway in a travel direction, the wheels of which are at least partially exposed laterally, the apparatus comprising:
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a Doppler-lidar device or a Doppler-radar device which emits an electromagnetic measurement beam having a known temporal progression of its frequency onto a target above the roadway in a direction in a slant with respect to the vertical and normal or in a slant with respect to the travel direction; and which records the temporal progression of the frequencies of the measurement beam reflected by the target, relative to the known progression, as a reception frequency mixture progression; and a subsequent evaluation device configured to detect a band of frequencies which is continuously inclining or declining within a period of time, in the reception frequency mixture progression as a wheel. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification