Method of determining the ability of a medium to absorb electromagnetic waves and a sensor for detecting foreign bodies in the medium
US6163292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Oct 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/885
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining the ability of a medium to absorb electromagnetic waves including placing antenna unit (10) having spaced transmitting and receiving antennas (2 and 3) on a limiting surface of a medium (13), emitting, with the transmitting antenna (2), a radar wave into the medium (13) which is detected as a cross-signal by the receiving antenna (3), pre-processing and digitalizing the cross-signal, and, thereafter, analyzing the cross-signal with an algorithm for determining the ability of the medium to absorb electromagnetic waves and, thereby, a type of the medium; and an electromagnetic sensor the operation of which is based on the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.