Signal transmitter location method for hands-free access control system for vehicle

• Main Author: KLINGER, JUERGEN
• Format: Patent
• Language: English; German
• Published: 07.12.2000
• Edition: 7
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE; CHECKING-DEVICES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GENERATING RANDOM NUMBERS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; REGISTERING OR INDICATING THE WORKING OF MACHINES; TESTING; TIME OR ATTENDANCE REGISTERS; VOTING OR LOTTERY APPARATUS

The signal transmitter location method uses 4 separate receivers (2a,2b,2c,2d) for detecting the signals provided by the transmitter (1), positioned in different planes, with evaluation of the signal reception times for the different receivers for location of the transmitter. The signal provided by the transmitter may be intensity modulated, for use as a trigger signal by the evaluation device (13) for evaluation of the reception signal timings, at least one of the received signals decoded and evaluated. Zur Ortsbestimmung eines Senders im Raum wird ein von diesem Sender ausgesandtes Signal von vier räumlich voneinander getrennten Empfängern, die nicht alle in derselben Ebene angeordnet sind, empfangen, wobei aus den Zeitabständen beim Empfang dieses Signals durch die vier Empfänger unter Berücksichtigung der Empfängeranordnung und der Ausbreitungsgeschwindigkeit des Signals im Raum der Ort des Senders bestimmt wird.