Circuit configuration having radar equipment for determining a distance or a relative speed
First Claim
Patent Images
1. A circuit configuration, comprising:
- a speed sensor disposed on a vehicle in which the circuit configuration is disposed, for measuring the speed of the vehicle; and
a radar equipment for determining a distance or a relative speed between the vehicle and an object;
said radar equipment emitting a frequency-modulated radar signal, receiving a reflected radar signal and determining the distance or the relative speed from a comparison of the emitted radar signal with the received radar signal; and
said radar equipment varying the frequency of the radar signal at a modulation rate depending on the speed of the vehicle and rising as the speed of the vehicle reduces.
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Abstract
A circuit configuration has a radar equipment for determining a distance or a relative speed. The radar equipment continuously transmits frequency-modulated signals, at modulation rates of different size, depending on the speed of the vehicle in which the radar equipment is installed. A higher modulation rate produces better range resolution for a constant maximum analog frequency, which is advantageous particularly in the low speed range.
18 Citations
7 Claims
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1. A circuit configuration, comprising:
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a speed sensor disposed on a vehicle in which the circuit configuration is disposed, for measuring the speed of the vehicle; and a radar equipment for determining a distance or a relative speed between the vehicle and an object; said radar equipment emitting a frequency-modulated radar signal, receiving a reflected radar signal and determining the distance or the relative speed from a comparison of the emitted radar signal with the received radar signal; and said radar equipment varying the frequency of the radar signal at a modulation rate depending on the speed of the vehicle and rising as the speed of the vehicle reduces. - View Dependent Claims (2)
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3. A method for operating a circuit configuration, which comprises:
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measuring a speed of a vehicle with a speed sensor disposed on the vehicle in which the circuit configuration is disposed; determining a distance or a relative speed between the vehicle and an object with radar equipment by emitting a frequency-modulated radar signal from the radar equipment, receiving a reflected radar signal and determining the distance or the relative speed from a comparison of the emitted radar signal with the received radar signal; and varying a frequency of the radar signal by the radar equipment at a modulation rate depending on the speed of the vehicle and rising as the speed of the vehicle reduces, and producing a first, high modulation rate when the speed of the vehicle is less than a first predetermined speed threshold. - View Dependent Claims (4, 5, 6, 7)
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Specification