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:
Nov. 17, 1981
Filed:
Oct. 09, 1979
Norman E Pedersen, Wilmington, MA (US);
Panametrics, Inc., Waltham, MA (US);
Abstract
A method and apparatus for determining volumetric fluid flow rate in an arbitrarily shaped fluid conveyance are disclosed. A plurality of functions, f.sub.j (p,m.sub.k) (where p is a position in the conveyance and m.sub.k depends upon the Reynolds number of the fluid flow), each function being approximately representative of the fluid flow velocity across the conveyance, are linearly combined to approximate the velocity, P(p), of the fluid flow at any point in a plane normal to fluid flow. The scalar constants A.sub.j,k, of the linear combination ##EQU1## are estimated by solving a system of linear equations, ##EQU2## in which acoustical measurements along the paths y.sub.i through the conveyance provide an estimate, v.sub.meas(i), of the actual average velocity v.sub.i at paths y.sub.i. The average fluid velocity and hence volumetric flow across the conveyance can then be determined by taking an area integral of the linear combination ##EQU3##