Method, with relative system, for continuous remote monitoring of the integrity of pressurized pipelines (104) and properties of the fluids transported, preferably able to be used with long-distance gas pipelines and oil pipelines, comprising the following phases: - installing a plurality of measurement stations (103) along the pipeline, connected to vibroacoustic sensors (101) suitable for simultaneously and continuously measuring elastic signals propagating in the walls of the pipeline, and acoustic signals propagating in said transported fluid; - synchronizing said signals x(t) measured from said different measurement stations (103), with absolute time reference,; - continuously transmitting said measured and synchronized signals x(t) to a central unit (102) suitable for processing them in a multichannel mode; - calculating, by means of said central unit (102), a plurality of transfer functions H(f) suitable for defining the vibroacoustic propagation in sections of pipeline (104) between consecutive measurement stations (103) using, as analysis signals, said measured and synchronized signals x(t) and the relative Fourier transforms X(f); - continuously updating said transfer functions H(f) using acoustic and elastic signals generated by passive sources (T) present along the pipeline (104); - filtering the relevant acoustic and elastic signals from the different measurement stations (103) subtracting the contribution relating to the passive sources (T); - creating an equivalent descriptive model of the system comprising the fluid transported, pipeline and external medium surrounding the pipeline itself, using said transfer functions H(f) connected with each other.

METHOD AND SYSTEM FOR CONTINUOUS REMOTE MONITORING OF THE INTEGRITY OF PRESSURIZED PIPELINES AND PROPERTIES OF THE FLUIDS TRANSPORTED

BERNASCONI, GIANCARLO
2013-01-01

Abstract

Method, with relative system, for continuous remote monitoring of the integrity of pressurized pipelines (104) and properties of the fluids transported, preferably able to be used with long-distance gas pipelines and oil pipelines, comprising the following phases: - installing a plurality of measurement stations (103) along the pipeline, connected to vibroacoustic sensors (101) suitable for simultaneously and continuously measuring elastic signals propagating in the walls of the pipeline, and acoustic signals propagating in said transported fluid; - synchronizing said signals x(t) measured from said different measurement stations (103), with absolute time reference,; - continuously transmitting said measured and synchronized signals x(t) to a central unit (102) suitable for processing them in a multichannel mode; - calculating, by means of said central unit (102), a plurality of transfer functions H(f) suitable for defining the vibroacoustic propagation in sections of pipeline (104) between consecutive measurement stations (103) using, as analysis signals, said measured and synchronized signals x(t) and the relative Fourier transforms X(f); - continuously updating said transfer functions H(f) using acoustic and elastic signals generated by passive sources (T) present along the pipeline (104); - filtering the relevant acoustic and elastic signals from the different measurement stations (103) subtracting the contribution relating to the passive sources (T); - creating an equivalent descriptive model of the system comprising the fluid transported, pipeline and external medium surrounding the pipeline itself, using said transfer functions H(f) connected with each other.
2013
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/822740
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