The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 2022
Filed:
Jan. 09, 2018
Continental Automotive Gmbh, Hannover, DE;
Franz Plattner, Arnschwang, DE;
Stefan Hermann, Neunkirchen am Brand, DE;
Alexander Heinrich, Donaustauf, DE;
Abstract
The invention relates to a method for verifying a prescribed maximum physical distance (MAX) of a radio key () in relation to a motor vehicle (), wherein a control apparatus () uses a radio device () of the motor vehicle () to transmit at least one electromagnetic radio signal to the radio key () and subsequently receives a respective electromagnetic response signal and, for each radio signal, takes the radio signal and the associated response signal as a basis in each case for using a signal propagation delay measurement to ascertain a respective signal propagation delay and checks whether the signal propagation delay fails to satisfy a predetermined propagation delay criterion (), and signals a transgression above the propagation delay () when the propagation delay criterion () is not satisfied.