Method and arrangement for measuring the temperature in a...

Details Method and arrangement for measuring the temperature in a... Method and arrangement for measuring the temperature in a...

G - Physics

01

N

349/40

G01N 29/02 (2006.01) G01K 11/26 (2006.01)

Patent

CA 1136753

ABSTRACT OF THE DISCLOSURE 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 molecular weight or standard-conditions gas density of the gaseous contents of the chamber. One of these two variables, i.e., temperature or else the molecular weight or gas density, is measured by conventional means. 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 dis- criminator 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 means with high accuracy.

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