Patent ID: 7716964
Filing Date: 2010-05-18
Classification: B64C,G01M

Abstract:
1. Apparatus for measuring a leak in a pressurized cylindrical container having a gas chamber where the length of said container and chamber changes with an applied load, comprising: a pressure sensor coupled to said container and positioned to measure the pressure (P) in said chamber, a temperature sensor coupled to said container and positioned to measure the temperature (T) of said container, a displacement sensor coupled to said container for measuring length changes of the container and chamber during different applied load conditions, and processing means coupled to said sensors to provide an output indicative of the volume of the chamber according to V V r is the radius of the chamber; L wherein said processing means providing an output according to the equation PV =nRT where: P is the pressure in the chamber; V is the volume of the chamber; n is the number of moles of gas the chamber; R is the universal gas constant; T is the absolute temperature of the chamber; wherein the number of moles of gas is determined during different load conditions where L