摘要:
The invention relates to a method and a device for allocating successive vehicles to traffic lanes. The allocation of the vehicles to traffic lanes takes place with the aid of a model, using a frequency distribution of the lateral misalignments of detected radar objects. The inventive method can also be used to detect maladjustment of the sensor.
摘要:
An electromagnetic method for sensing and/or locating a person forming a non-co-operative target, wherein an electromagnetic signal is transmitted (1) in a search area (N) and the backscatter signal from the area (N) is detected (2). The method is characterised in that transmission and reception are carried out using at least two separate antennas, the resulting signal(s) is (are) filtered with a low-pass or band-pass filter (12) to extract components that are indicative of human motion, and the resulting filtered signal(s) is (are) processed to determine the presence and/or location of the person. A system for carrying out the method is also provided. Said method and system are useful for locating avalanche victims.
摘要:
Es wird ein Verfahren zur Korrektur von durch Zeitabweichungen von Taktgebern verursachten Meßfehlern bei der Ortung von Luftfahrzeugen in einem Sekundär-Radarsystem angegeben. Zur Ermittlung einer Zeitabweichung der Taktgeber zweier Bodenstationen (S1, S2; ... S1, S4) voneinander werden unmittelbar aufeinanderfolgend zwei Abfrage/Antwortzyklen in entgegengesetzten Richtungen über dieselbe Übertragungsstrecke (d1 + d2) ausgeführt:
Abfrage durch Bodenstation S1, Empfang der von der Bordstation BS eines Luftfahrzeuges ausgegebenen Antwort durch Bodenstation S2 Abfrage durch Bodenstation S2, Empfang der Antwort durch Bodenstation S1.
Beide Übertragungszeitspannen unterscheiden sich um das Doppelte der Abweichung der Taktgeber der beiden Bodenstationen S1, S2. Die festgestellte Abweichung wird zur Korrektur der Laufzeitmeßwerte und/oder zur Synchronisation der Taktgeber verwendet. Die Synchronisation mehrerer Bodenstationen mit einer Zentralstation wird durch aufeinanderfolgende Abfrage/Antwort-Zyklen zwischen der Zentralstation (S1) und allen anderen Stationen (S2 - S4) erreicht.
摘要:
The invention relates to a method for calibrating a sensor (3) of a motor vehicle (1), wherein a respective received signal is continuously received by two receiving devices (9, 9') of the sensor (3) by means of a computing device (7) while the motor vehicle (1) is moved relative to an object (8), said received signal describing a sensor signal which is transmitted by the sensor (3) and reflected by the object (8). A measurement angle (α) between the sensor (3) and the object (8) is determined using a phase difference (∆φ) of the received signals, and the relative position between the sensor (3) and the object (8) is continuously determined using the received signals. The computing device (7) determines a reference time (t0) when the relative position corresponds to a specified reference position for which a reference angle (β) between the sensor (3) and the object (8) is known, the measurement angle (α) is determined for the reference time (t0), and the sensor (3) is calibrated using a comparison of the measurement angle (α) for the reference time (t0) with the reference angle (β).
摘要:
In accordance with one embodiment, a radar system (10) with auto-alignment suitable for use in an automated vehicle is provided. The system (10) includes a radar-sensor (14), a speed-sensor (30), and a controller (34). The radar-sensor (14) is used to detect objects (20) present in a field-of-view (16) proximate to a host-vehicle (12) on which the radar-sensor (14) is mounted. The radar-sensor (14) is operable to determine a measured-range-rate (22) (dRm), a measured-azimuth-angle (24) (Am), and a measured-elevation-angle (26) (Em) to each of at least three objects (20) present in the field-of-view (16). The speed-sensor (30) is used to determine a measured-speed (32) (Sm) of the host-vehicle (12). The controller (34) is in communication with the radar-sensor (14) and the speed-sensor (30). The controller (34) is configured to simultaneously determine a speed-scaling-error (36) (Bs) of the measured-speed (32), an azimuth-misalignment (38) (Ba) of the radar-sensor (14), and an elevation-misalignment (40) (Be) of the radar-sensor (14) based on the measured-range-rate (22), the measured-azimuth-angle (24), and the measured-elevation-angle (26) to each of the at least three objects (20), while the host-vehicle (12) is moving.