Vehicle identification method and apparatus, primary device, and secondary device
US11804130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2021 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Jun 28, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B15/063
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Implementations of the present specification provide a vehicle identification method and apparatus, a primary device, and a secondary device. In the vehicle identification method, after sending a low-frequency signal, the primary device receives a response signal sent by the secondary device for the low-frequency signal, and communicates with the secondary device to obtain identity information of a vehicle on which the secondary device is located, so that the vehicle can be identified. The response signal is sent from the secondary device after the secondary device receives the low-frequency signal and detects that the signal strength of the low-frequency signal is greater than or equal to a predetermined threshold, and the signal strength of the low-frequency signal rapidly attenuates as the distance increases, so that the primary device can determine the location of the vehicle on which the secondary device is located solely based on the received response signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.