Differential comparative pressure monitoring system

G - Physics – 01 – M

Patent

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Details

G01M 3/26 (2006.01) G01L 13/00 (2006.01) G01L 15/00 (2006.01) G01M 3/02 (2006.01) G01N 19/08 (2006.01)

Patent

CA 2706520

A differential comparative pressure monitoring system (10) for monitoring the structural integrity of a structure or component (30) comprises a pressure source (12); a first fluidic circuit (14), and a reference fluidic circuit (16) which are connected in parallel to the pressure source (12); and a monitoring device (18). The first and reference fluidic circuits (14) and (16) are formed to have substantially matched characteristics. These characteristics include volumetric capacity of each of the circuits, fluid flow rates through the circuits, their temperature characteristics, and diffusion characteristics. The first circuit (14) comprises a sensor element (20) which is sealed to a surface (28) on the structure or component (30) being monitored by the system (10). The reference circuit (16) is in fluidic isolation from the surface (28) of the structure or component (30). The monitoring device (18) is coupled to the first and reference circuits (14) and (16) and takes simultaneous measurements of a common fluidic characteristic of the circuits (14) and (16), and produces a signal indicative the integrity of the structure or component based on a difference between the simultaneously measured common characteristic of the circuits (14) and (16).

L'invention concerne un système de surveillance de pression par comparaison différentielle (10) pour surveiller l'intégrité structurelle d'une structure ou d'un composant (30) comprenant une source de pression (12); un premier circuit fluidique (14) et un circuit fluidique de référence (16) qui sont branchés en parallèle à la source de pression (12); et un dispositif de surveillance (18). Le premier circuit fluidique (14) et le circuit fluidique de référence (16) sont formés de manière à présenter des caractéristiques sensiblement concordantes. Ces caractéristiques incluent la capacité volumétrique de chacun des circuits, les débits de fluide à travers les circuits, leurs caractéristiques de température et leurs caractéristiques de diffusion. Le premier circuit (14) comprend un élément détecteur (20) qui est scellé sur une surface (28) de la structure ou du composant (30) surveillé par le système (10). Le circuit de référence (16) est isolé sur le plan fluidique de la surface (28) de la structure ou du composant (30). Le dispositif de surveillance (18) est couplé au premier circuit (14) et au circuit de référence (16) et réalise des mesures simultanées d'une caractéristique fluidique commune des circuits (14) et (16) et produit un signal indicateur de l'intégrité de la structure ou du composant sur la base d'une différence entre la caractéristique commune mesurée simultanément des circuits (14) et (16).

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