DEVICE AND METHOD FOR FLUID LEAKAGE DETECTION IN PRESSURIZED PIPES

The present invention relates to a device and a method for identifying leaks in pressurized pipelines. The device for fluid leak detection in pressurized pipelines consists of a pressure sensor, a valve, a flow meter, a control valve and a control device. The pressure sensor and the valve are arranged in order in the pipeline between the coupling through which the device is connected to the pipeline and through which fluid enters and the coupling through which fluid exits, and the other components are arranged along the pipeline. The method of the invention consists of the following steps: (A) identifying the pattern wave under leak-less conditions for various flow rates in the functional range, (B) identifying the overpressure wave during operation, (C) comparing the pattern wave identified in step (A) with the overpressure wave collected in step (B), both waves are obtained using similar flow rates in order to determine the presence or absence of leaks in the pipeline. The comparison is performed by means of a combination of the following techniques: area difference, root mean square difference, positive area difference, negative area difference, and difference between the maximum and minimum pressure peaks. In the process of determining the presence of leaks, the aforementioned comparison methods require that the user establish a threshold value that allows for leak identification when one or a combination of the values determined by said methods exceeds the established threshold percentage. La présente invention concerne un dispositif et un procédé pour identifier des fuites dans des canalisations sous pression. Le dispositif pour la détection de fuite de fluide dans des canalisations sous pression est constitué d'un capteur de pression, d'une valve, d'un débitmètre, d'une soupape de régulation et d'un dispositif de commande. Le capteur de pression et la valve sont disposés dans cet ordre dans la canalisation entre l'accouplement par lequel le dispositif est relié à la canalisation et à travers lequel le fluide entre et l'accouplement à travers lequel le fluide sort, et les autres pièces sont agencées le long de la canalisation. Le procédé de l'invention comporte les étapes suivantes : (A) identifier l'onde type dans des conditions sans fuites pour différents débits d'écoulement dans la plage fonctionnelle, (B) identifier l'onde de surpression pendant le fonctionnement, (C) comparer l'onde type identifiée à l'étape (A) avec l'onde de surpression recuei