Measuring and testing – Volume or rate of flow – Thermal type
Patent
1978-04-17
1980-10-21
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Thermal type
G01F 168, G01F 170
Patent
active
042286832
ABSTRACT:
The instant invention provides a method for determining the streaming velocity of a streaming liquid by injecting a thermopulse into the liquid and measuring its transit time. The pulse is detected by its ascending flank at downstream points and by its ascending or descending flank at its point of injection. For short transit times, provision is made to eliminate the heat up time of the heating wire imparting the pulse from the transit time measurement. The liquid may stream continuously or discontinuously, and if the later, provision is made to delay measurement on initiation of flow until the flow pattern has stabilized. The time is determined by counting pulses from a pulse generator during the period the pulse is traveling between the point of injection and a detection point or between two detection points.
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patent: 2603089 (1952-07-01), Morley et al.
patent: 2724271 (1955-11-01), Shawhan et al.
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patent: 3399566 (1968-09-01), Brown
patent: 3739636 (1973-06-01), Versaci
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patent: 4028689 (1977-06-01), Schopp
Juffa Richard
Uerdingen Walter
Wawra Georg
Bayer Aktiengesellschaft
Goldstein Herbert
Harsh Gene
Pope Lawrence S.
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