Patent ID: 6249748
Filing Date: 2001-06-19
Classification: G01F

Abstract:
An apparatus for determining a flow rate of a fluid substance discharged from a reserving device comprising:an instantaneous sensor for measuring an instantaneous state parameter of said fluid substance stored in said reserving device; anda data processor electrically connected with said instantaneous sensor for calculating said flow rate of said fluid substance according to said instantaneous state parameter, wherein said flow rate of said fluid substance is determined by an equation ##EQU19##wherem is said flow rate of said fluid substance,m.sub.r,t is the mass of said fluid substance in said reserving device,m.sub.r,t= 0 is the initial mass of said fluid substance in said reserving device,P.sub.r,t=0 is the initial pressure in said reserving device,P.sub.r,t is the pressure varying with time in said reserving device, and.gamma. is the specific heat ratio of said fluid substance.