The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 1999
Filed:
Oct. 15, 1996
Zeki Z Celik, Sunnyvale, CA (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
An apparatus is described which determines the velocity of a fluid flow stream by measuring the frequency of vortex shedding from an obstruction in the fluid flow stream. A constant known as the Strouhal number is used to relate the measured vortex shedding frequency to the fluid flow velocity. The Strouhal number is a function of the Reynolds number for the obstruction, which is also a function of fluid flow velocity. Hence, an iterative technique is provided, first using an estimated Strouhal number to estimate the fluid flow velocity, using the estimated fluid flow velocity to estimate the Reynolds number, then using the Reynolds number to get a better estimate of the Strouhal number. The apparatus repeats this cycle until the estimate of the fluid flow velocity converges.