Apparatus and method for determining a vehicle feature
First Claim
1. An apparatus for determining a characteristic feature of a vehicle travelling on a roadway, comprising:
- a detector, which is directed towards the roadway and which is configured to measure a movement vector of the vehicle at a current location at a current time;
a tracking unit, connected to the detector, for calculating a target location of the vehicle at a target time using the current location, current time and movement vector;
a first radar sensor, connected to the detector, for transmitting a first radar beam directed towards the current location, receiving a first reflected radar beam and determining a first frequency spectrum of the first reflected radar beam;
a second radar sensor, connected to the tracking unit, for transmitting a second radar beam, directed towards the target location, at the target time, receiving a second reflected radar beam, and determining a second frequency spectrum of the second reflected radar beam; and
an evaluation unit for generating the characteristic feature of the vehicle from the determined frequency spectra, wherein the determined frequency spectra constitute the characteristic feature of the vehicle, and wherein the frequency spectra form the characteristic feature as a surface over a frequency/time plane.
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Abstract
Techniques are disclosed for determining characteristic feature(s) of a vehicle travelling on a roadway, comprising: a detector, which is directed towards the roadway and is configured to measure the movement vector of the vehicle at a current location and time, a tracking unit, connected to the detector, for calculating a target location of the vehicle at a target time on the basis of current location and time and movement vector, a first radar sensor, connected to the detector, for transmitting a radar beam directed towards the current location, receiving a reflected radar beam, and determining a frequency spectrum thereof, a second radar sensor, connected to the tracking unit, for transmitting a radar beam directed towards the target location at the target time, receiving a reflected radar beam and determining a frequency spectrum thereof, and an evaluation unit for generating characteristic feature(s) of the vehicle from the determined frequency spectra.
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Citations
16 Claims
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1. An apparatus for determining a characteristic feature of a vehicle travelling on a roadway, comprising:
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a detector, which is directed towards the roadway and which is configured to measure a movement vector of the vehicle at a current location at a current time; a tracking unit, connected to the detector, for calculating a target location of the vehicle at a target time using the current location, current time and movement vector; a first radar sensor, connected to the detector, for transmitting a first radar beam directed towards the current location, receiving a first reflected radar beam and determining a first frequency spectrum of the first reflected radar beam; a second radar sensor, connected to the tracking unit, for transmitting a second radar beam, directed towards the target location, at the target time, receiving a second reflected radar beam, and determining a second frequency spectrum of the second reflected radar beam; and an evaluation unit for generating the characteristic feature of the vehicle from the determined frequency spectra, wherein the determined frequency spectra constitute the characteristic feature of the vehicle, and wherein the frequency spectra form the characteristic feature as a surface over a frequency/time plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for determining a characteristic feature of a vehicle travelling on a roadway, said method comprising:
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transmitting a first radar beam, directed towards a current location, at a current time, receiving a first reflected radar beam and determining a first frequency spectrum of the first reflected radar beam, with simultaneous, prior or subsequent measurement of a movement vector of the vehicle at the current location and calculation of a target location of the vehicle at a target time using the current location, current time and movement vector; transmitting a second radar beam, directed towards the target location, at the target time, receiving a second reflected radar beam, and determining a second frequency spectrum of the second reflected radar beam; and generating the characteristic feature of the vehicle from the determined frequency spectra, wherein the determined frequency spectra constitute the characteristic feature of the vehicle, and wherein the frequency spectra form the characteristic feature as a surface over a frequency/time plane. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification