Patent ID: 7913572
Filing Date: 2011-03-29
Classification: G01N

Abstract:
1. An integrated multi-measurement system for measuring physical properties including thickness, electrical resistance and differential pressure of a gas diffusion layer for a polymer electrolyte fuel cell with respect to compression, comprising: a motor and a rod for applying pressure to a gas diffusion layer sample; a plate descending by the pressure applied by the motor and the rod; a thickness gauge fixed on the plate and measuring a change in thickness of the gas diffusion layer sample depending on the pressure; an upper plated sheet which is pressed at an upper surface thereof by the plate and which comes into contact with a lower portion of the plate descending by the pressure applied by the motor and the rod to thus press the gas diffusion layer sample located under the upper plated sheet, the upper plated sheet having gas outlets formed in one or more surfaces of the upper plated sheet to discharge a gas passed through the gas diffusion layer sample to outside via an internal passage and a milliohm meter connection terminal formed at a position of a plated surface of the upper plated sheet; a lower plated sheet located under the upper plated sheet to thus support the pressure applied to the gas diffusion layer sample and having a gas inlet formed in one surface of the lower plated sheet to supply the gas to the gas diffusion layer sample so that the gas is discharged to the gas diffusion layer sample via an internal passage and a milliohm meter connection terminal formed at a position of the lower plated sheet; a milliohm meter wire-connected to the milliohm meter connection terminals respectively mounted to the upper plated sheet and the lower plated sheet so as to measure electrical resistance; and a control box including a load indicator, a motor speed controller, a load controller, and a differential pressure gauge for measuring differential pressure for an in-plane and a through-plane of the gas diffusion layer sample pressed by the motor and the rod.