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US 5,861,836 AGranted
Circuit configuration having radar equipment for determining a distance or a relative speed
AssigneeSiemens Aktiengesellschaft
InventorAlfred Hoss
Life of this patent
Estimating the term…
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.
Claims7
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.
3 more elements
A method for operating a circuit configuration, which comprises:
- 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.
1 more element
Dependencies are inferred from the claim text.