Process and apparatus for investigating and controlling changes of state of a liquid or gelled medium by differential thermal analysis
US5064294A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Jul 24, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N25/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Gelling of a liquid or liquefication of a gel are investigated or controlled by differential measurement of thermal characteristics of the involved medium. The temperature of the medium is measured by a first probe (delivering a first temperature indicating signal) while a second probe (sufficiently far away from the first probe not to disturb the latter through temperature changes) imparts heat to said medium and delivers a signal corresponding to its temperature. The signals respectively emitted by the probes are processed in an electrical data processing unit wherein the signals are combined in a correcting stage which corrects the signal delivered by the second probe taking into account the signal delivered by the first probe to deliver information indicating the change of state of the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.