METHOD AND SYSTEM FOR THE CONTINUOUS REMOTE TRACKING OF A PIG DEVICE AND DETECTION OF ANOMALIES INSIDE A PRESSURIZED PIPELINE

摘要

A method and system are described for the continuous remote monitoring of the position and advance speed of a pig device inside a pipeline suitable for transporting a pressurized fluid, wherein the pipeline consists of a plurality of pipe sections joined to each other by welding. The method comprising the following steps: continuous acquisition and registration, by a plurality of measurement stations equipped with vibroacoustic sensors discretely located along the pipeline, of vibroacoustic signals due to hydraulic pressure transients, and/or to the vibrations generated by the pig device in movement in the contact/friction phases on the welding seams, and/or to other physical variations of the pipeline; analysis and processing, by a centralized control unit, of the vibroacoustic signals registered by the measurement stations to reveal, identify and reference the hydraulic/acoustic transients produced by the pig device during contact/friction with the weldings and/or with other variations in the internal section of the pipeline; continuous calculation of the linear position and advance speed of the pig device in relation to the time lapse between the vibroacoustic signals registered by at least two measurement stations installed along the pipeline.

主权项

1. A method for the continuous remote monitoring of the position and advance speed of a pig device (10) inside a pipeline (12) suitable for transporting a pressurized fluid, wherein the pipeline (12) consists of a plurality of pipe sections joined to each other by welding, the method comprising the following steps:
continuous acquisition and recording, by means of a plurality of measurement stations (14) equipped with vibroacoustic sensors discretely located along the pipeline (12), of vibroacoustic signals due to hydraulic pressure transients, and/or to the vibrations generated by the moving pig device (10) in the contact/friction steps on the welding seams, and/or to other physical variations locally present in the multiple pipe sections of the pipeline (12); analysis and processing, by means of a centralized control unit (18), of the vibroacoustic signals registered by the measurement stations (14) to reveal, identify and reference the hydraulic/acoustic transients produced by the pig device (10) during contact/friction with the weldings and/or with other variations of the internal section of the pipeline (12); continuous calculation of the linear position and advance speed of the pig device (10) in relation to the time lapse between the vibroacoustic signals registered by at least two measurement stations (14) installed along the pipeline (12).