Patent ID: 6212942
Filing Date: 2001-04-10
Classification: G01M

Abstract:
A leakage inspection method for detecting an internal leakage of a fluid flowing in an apparatus having a normal flow path defined by a plurality of sections, said leakage inspection method detectng the internal leakage in a deviated flow path from a section on the upstream side to a section on the downstream side of the normal flow path, said normal flow path having an inlet and an outlet, said method comprising the steps of:applying a pressure wave from said inlet to said normal flow path and said deviated flow path when said internal leakage occurs;detecting a first physical quantity of said pressure wave passing through said normal flow path within said apparatus, at said outlet;detecting a second physical quantity of said pressure wave passing through said deviated flow path within said apparatus when said internal leakage occurs, at said outlet; anddetermining a quantity of said internal leakage from a difference between said first physical quantity and said second physical quantity.