System and method for navigation using two-way ultrasonic positioning
US6674687B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2015/465
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A two-way ultrasonic positioning and navigation system and method involve a plurality of objects each capable of transmitting and receiving ultrasonic signals. A first object transmits an initiating ultrasonic signal and identifies a second object for responding to the initiating ultrasonic signal. The second object transmits a responding ultrasonic signal after a predetermined time delay from receiving the initiating ultrasonic signal. The first objectives the responding ultrasonic signal, and determines a distance between the first object and the second object based on a time period starting at the transmission of the initiating ultrasonic signal and ending at the reception of the responding ultrasonic signal, and on knowledge about the predetermined time delay and other known in advance time delays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.