专利名称：Temperature measurement发明人：Nuspl, Steven Paul,Szmania, Edmund
P.,Kleppe, John Arthus,Norton, Peter Richard
申请号：EP88306750.6申请日：19880722公开号：EP0304170A2公开日：19890222
专利附图：
摘要：Apparatus for measuring high temperatures in a boiler (10) transmits (20)pulses of acoustic waves from one side wall (22) of the boiler to an opposite side wall (24)thereof. Acoustic noise within the boiler, as well as the transmitted pulses of acousticwaves, are received (26) at the opposite side wall (24) of the boiler. The received signal isdigitized (56) and compared to a digitized sample of the pulses during a time periodwhich is more than the maximum transit time for the pulses between the side walls (22,24). A point of maximum correlation between the sample and the signal is taken as the
arrival time for the pulse and is used to calculate the transit time of the pulse across theboiler. This transit time is used in turn to calculate the velocity of the pulses. The
temperature can then be calculated as a function of the velocity, the molecular weight ofthe medium and the specific heat ratio of the medium. Each pulse had a modulatedfrequency between 500 and 3000 Hz.
申请人：THE BABCOCK & WILCOX COMPANY
地址：1010 Common Street, P.O. Box 60035 New Orleans, Louisiana 70160 US
国籍：US
代理机构：Cotter, Ivan John
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