Measurement method and apparatus
US8995226B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2011 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Jun 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided a method and associated apparatus for measurement. Specifically, a method for determining a distance travelled by a signal in a medium, or the time of flight of a signal travelled. The method comprises considering an unambiguous range wherein the unambiguous range greater than a distance to be travelled by a signal. A signal is then transmitted across the distance to be determined, the signal comprising at least two frequency components, the frequency components based on the unambiguous range and the speed of the signal in the medium. The distance travelled (or the time of flight) is determined by using the variance of the received phase characteristics, such as phase angle) of one frequency component of the received signal with the received phase characteristics of another frequency component of the received signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.