Method and system for positional measurement using ultrasonic sensing
US8000926B2 · kind B2 · utility
87Cited by
23References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2010 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Apr 20, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3983
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for determining position and alignment is provided. The method includes monitoring a first and second sequence of ultrasonic signals transmitted from the first device to a second device, estimating a location of the first device from Time of Flight measurements of the ultrasonic signals at respective microphones on the second device, calculating a set of phase differences, weighting a difference of an expected location and estimated location of the first device with the set of phase differences to produce a relative displacement, and reporting a position of the first device based on the relative displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.