Patent · US Active

Method for verifying a predefined maximum spatial distance of a radio key in relation to a motor vehicle, as well as control device, motor vehicle and radio key

US11217047B2 · kind B2 · utility

1Cited by

2References

17Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Franz Plattner · Arnschwang, DE
Stefan Hermann · Neutraubling, DE
Alexander Heinrich · Bad Abbach, DE

Key dates

Filing date	Jan 9, 2018
Grant date	Jan 4, 2022
Priority date	—
Expiry date	Jan 9, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG07C2209/63
WIPO fieldControl
WIPO sectorInstruments

Abstract

The invention relates to a method for verifying a prescribed maximum physical distance (MAX) of a radio key (11) in relation to a motor vehicle (10), wherein a control apparatus (26) uses a radio device (21) of the motor vehicle (10) to transmit at least one electromagnetic radio signal to the radio key (11) 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 (27), and signals a transgression above the propagation delay (28) when the propagation delay criterion (27) is not satisfied.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.