Electronic key system, on-board device, and electronic key
US10369965B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2016 |
| Grant date | Aug 6, 2019 |
| Priority date | — |
| Expiry date | Dec 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2209/63
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic key system includes an on-board device and an electronic key for wireless communication. The on-board device includes: a pattern determining unit sequentially changes and determines a variation pattern of the electromagnetic wave intensity of a measurement signal; a request signal generating unit generating a request signal to which the measurement signal is added; and an LF transmitter sequentially transmitting the request signal so that the variation pattern of the electromagnetic wave intensity of the measurement signal in the request signal is changed by the pattern determining unit. The electronic key includes: an LF receiver receiving the request signal; a measurement unit sequentially measuring the variation pattern; and a key transmitter transmitting a response signal to the on-board device. The on-board device further includes: an on-board device receiver receiving the response signal; and a verifying section establishing verification of the electronic key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.