Method for detection of a fluid leak related to a piston...

Details Method for detection of a fluid leak related to a piston... Method for detection of a fluid leak related to a piston...

G - Physics

01

M

G01M 3/02 (2006.01)

Patent

CA 2678659

A method for detection of a fluid leak related to at least one piston machine (1), where the method includes: - attaching a vibration sensor (38, 40) to at least one of the upstream pipe (8) or the downstream pipe (14) of the pis-ton machine (1); - measuring the vibration at the at least one vibration sen-sor (38, 40); - attaching a sensor (32) to the at least one piston machine (1) that renders a signal for calculating the rotational speed and shaft position of the at least one piston machine (1); - calculating the rotational speed and angular shaft position of the at least one piston machine (1); - calculating at least one complex harmonic Fourier amplitude of the measured vibration signal; - low pass filtering said amplitude; - calculating the deviation amplitude as the magnitude of a complex difference between said filtered amplitude and a base amplitude; and - monitoring said deviation amplitude (46) to detect a leakage.

Procédé permettant de détecter une fuite de liquide d'une machine à piston (1). Ce procédé consiste à fixer un détecteur de vibrations (38, 40) sur un tuyau en amont (8) ou un tuyau en aval (14) de la machine à piston (1), mesurer les vibrations au moyen du détecteur de vibrations (38, 40), fixer un détecteur (32) sur une machine à piston (1) qui produit un signal pour calculer la vitesse rotative et la position de l'arbre de la machine à piston (1), calculer la vitesse rotative et la position angulaire de l'arbre de la machine à piston (1), calculer au moins une amplitude de Fourier, harmonique et complexe du signal de vibration mesuré, filtrer en passe-bas l'amplitude, calculer l'amplitude de déviation en tant qu'ampleur d'une différence complexe entre l'amplitude filtrée et une amplitude de base, et surveiller l'amplitude de déviation (46) pour détecter une fuite.

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