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 a temporal progression of its frequencies relative to the known temporal 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.
17 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 a temporal progression of its frequencies relative to the known temporal 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, 11, 12, 13)
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14. 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 temporal 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 (15, 16, 17, 18, 19, 20)
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Specification