Device and process for measuring distance and speed
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorThomas Sauer
Life of this patent
Estimating the term…
Abstract
A device and process for measuring distances and/or speeds between a motor vehicle and several objects, like mobile targets and fixed targets, has an FMCW radar system, where the motor vehicle transmits a signal, whose transmitting frequency is modulated with at least two frequency ramps. A device detects the receiving signals from the objects and determines the respective straight lines and the intersecting points of these straight lines in a speed-distance diagram. A sorting device sorts out the intersecting points from fixed targets and the related straight lines. A device outputs the distances and/or the speeds, which correspond to the other intersecting points.
Claims13
A device for measuring distances and/or speeds between a motor vehicle and several objects, the device comprising:
- a frequency modulated continuous wave (FMCW) radar system arranged in the motor vehicle, said radar system transmitting a signal, whose transmitting frequency is modulated with at least two frequency ramps;
- a detector that detects signals received from said objects and determines respective straight lines in intersecting points of said straight lines in a speed-distance diagram;
- a device for sorting out the intersecting points from fixed targets and related straight lines;
- and
- an output device for outputting the distances and/or speeds, which correspond to other intersecting points.
A motor vehicle guidance system, comprising:
- a cruise control system;
- and
- a device for measuring distances and/or speeds between a motor vehicle and several objects, the device comprising:
- a frequency modulated continuous wave (FMCW) radar system arranged in the motor vehicle, said radar system transmitting a signal, whose transmitting frequency is modulated with at least two frequency ramps;
- a detector that detects signals received from said objects and determines respective straight lines in intersecting points of said straight lines in a speed-distance diagram;
- a device for sorting out the intersecting points from fixed targets and related straight lines;
- and
- an output device for outputting the distances and/or speeds, which correspond to other intersecting points;
- wherein said cruise control system is coupled with said device for measuring distances and/or speeds.
A process for measuring distances and/or speeds between a motor vehicle and several objects such as mobile targets and fixed targets, the process comprising the acts of:
- transmitting a signal via an FMCW radar system, said signal having a transmitting frequency modulated with at least two frequency ramps;
- detecting signals received from said objects;
- determining respective straight lines and intersecting points of said straight lines in a speed-distance diagram based on the received signals;
- sorting the intersecting points from the fixed targets and the related straight lines;
- and
- outputting the distances and/or speeds in correspondence with other of the intersecting points.
Dependencies are inferred from the claim text.