Method for the measurement of temperatures by microwave radiometry, with automatic calibration of the measurement, and device for operating this method
US5176146A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Aug 1, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0507
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The device comprises a microwave detector, a short-circuit microwave, a first modulator, or microwave-switch, a circulator with three successive channels, at least two sources of internal reference temperatures, a second modulator or microwave-switch, possibly an attenuator, a synchronization command circuit acting both on the first modulator and on the second modulator to obtain at least four different successive outgoing signals, a microwave detector, advantageously a microwave amplifier, and a calculator connected to the output of synchronization command circuit, said at least four successive signals being detected to deduce therefrom the temperature at the detector level, independently of the coefficient of reflection of the detector with respect to the region of the losses and of the modulators and of the cables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.