Method and system for measuring temperatures in combustion chambers
US4317366A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1979 |
| Grant date | Mar 2, 1982 |
| Priority date | — |
| Expiry date | Dec 14, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02881
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The interior space of a combustion chamber, boiler, or other such gas-filled chamber exhibits an acoustic response spectrum to acoustic energy excitation which includes plural maxima attributable to acoustic natural-vibration frequencies. The frequencies of these natural vibrations are dependent upon both the interior temperature of the chamber and also upon the normality or molarity of the gaseous contents of the chamber. One of these two variables, i.e., temperatures or else normality or molarity, is measured by conventional devices. The other variable is then measured using a pressure transducer generating an electrical signal indicative of the chamber interior's acoustic response spectrum, the transducer output signal being applied to a discriminator circuit which develops a measurement signal indicative of the value of the variable being measured. In this way, interior temperature can be continuously monitored by acoustic devices with high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.