Sicherheitssystem zum Steuern der Entriegelung von mindestens einer Kraftfahrzeugöffnung

Interrogation signal emitted by emitting/receiving means (1) is modulated so that they are decomposed in two frequencies, su as 125 kHz and 112,5 kHz. Transponder (2) answers by emitting identification signal at same frequencies. Identification signal frequencies present attenuation relative to inte...

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Bibliographische Detailangaben
1. Verfasser:	RYDEL, CHARLES
Format:	Patent
Sprache:	ger
Schlagworte:	ACCESSORIES THEREFOR ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CHECKING-DEVICES FIXED CONSTRUCTIONS GENERATING RANDOM NUMBERS HANDCUFFS KEYS LOCKS PERFORMING OPERATIONS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES SAFES TIME OR ATTENDANCE REGISTERS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR VOTING OR LOTTERY APPARATUS WINDOW OR DOOR FITTINGS
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Beschreibung
Zusammenfassung:	Interrogation signal emitted by emitting/receiving means (1) is modulated so that they are decomposed in two frequencies, su as 125 kHz and 112,5 kHz. Transponder (2) answers by emitting identification signal at same frequencies. Identification signal frequencies present attenuation relative to interrogation signal frequencies. If intermediate emitting/receiving means (E1, E2) are inserted between car and transponder, relative attenuation will be modified.