Title:
POSITION DETERMINATION DEVICE, POSITION DETERMINATION METHOD, AND VEHICLE ELECTRONIC KEY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/120307
Kind Code:
A1
Abstract:
In the present invention, a smart ECU transmits, from a plurality of LF transmitters, an LF signal that includes a transmitter number indicating the transmission origin, and measures the distance to a smart key using a BLE communicator. The smart key transmits a BLE signal indicating the LF reception strength for each transmission origin to the smart ECU at a prescribed timing. The smart ECU maintains a map indicating combinations of distances and LF reception strengths, which can be measured when the smart key is in a prescribed area such as the vicinity of a vehicle door or inside a passenger compartment. The smart ECU determines whether the smart key is present in an object area by comparing an actual observed value pertaining to distance and LF reception strength and the content registered in the map.
Inventors:
SAIKI TAKASHI (JP)
NAKAKURA YOHEI (JP)
SANJI KENICHIRO (JP)
TANAKA YASUHIRO (JP)
NAKAKURA YOHEI (JP)
SANJI KENICHIRO (JP)
TANAKA YASUHIRO (JP)
Application Number:
PCT/JP2022/045880
Publication Date:
June 29, 2023
Filing Date:
December 13, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01S5/02; B60R25/24; E05B49/00; G01S11/02; G01S13/74; G01S13/84
Foreign References:
| JP2020510567A | 2020-04-09 | |||
| JP2012175518A | 2012-09-10 | |||
| JP2021128083A | 2021-09-02 | |||
| JP2021066193A | 2021-04-30 | |||
| JP2015169008A | 2015-09-28 | |||
| US20190275986A1 | 2019-09-12 | |||
| JP2019203310A | 2019-11-28 | |||
| JP2019083403A | 2019-05-30 |
Attorney, Agent or Firm:
YAHAGI Kazuyuki et al. (JP)
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