SYSTEM AND METHOD FOR PASSIVE ACOUSTIC MONITORING OF FLUIDS AND SOLIDS IN PIPE FLOW
First Claim
1. System for analyzing acoustic signals from a pipe or similar, the system comprising at least one acoustic sensor for registering acoustic signals generated in the pipe in at least two time windows, and processing means for processing the acoustic signals, the processing means for processing the signals is adapted to split the signals in at least two frequency bands, each covering a chosen frequency range by using signal processing wherein the processing means is adapted to calculate a set of characteristics for the signal within each of said frequency bands, the characteristics including frequency range of each of said frequency bands and mean value and deviation of the received signals at said frequency bands, the characteristics being indicative for possible events occurring in the pipe, and an analysis tool for analyzing the characteristics in said time windows and frequency bands for detecting said possible events.
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Abstract
The invention relates to a system or method for measuring and analyzing acoustic signals from a pipe, e.g. from solid particles or cleaning pigs transported with fluid flow in a pipe, the method comprising the following steps: *registering acoustic signals generated in the pipe in at least one time window, *splitting the signals in a number of frequency bands, *processing the filtered signals to calculate characteristics of the fluid flow in a pipe, the characteristics including mean and deviation of the signal in each frequency band, the characteristics being indicative of possible events occurring in the pipe.
51 Citations
16 Claims
- 1. System for analyzing acoustic signals from a pipe or similar, the system comprising at least one acoustic sensor for registering acoustic signals generated in the pipe in at least two time windows, and processing means for processing the acoustic signals, the processing means for processing the signals is adapted to split the signals in at least two frequency bands, each covering a chosen frequency range by using signal processing wherein the processing means is adapted to calculate a set of characteristics for the signal within each of said frequency bands, the characteristics including frequency range of each of said frequency bands and mean value and deviation of the received signals at said frequency bands, the characteristics being indicative for possible events occurring in the pipe, and an analysis tool for analyzing the characteristics in said time windows and frequency bands for detecting said possible events.
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9. Method for analyzing acoustic signals from a pipe or similar, the method comprising the following steps:
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registering acoustic signals generated in the pipe in at least two time windows, splitting the signals in at least two frequency bands, each covering a chosen frequency range, processing the filtered signals to calculate characteristics of the acoustic signal in each of said frequency bands, the characteristics including mean and deviation of the signal in each frequency band, the characteristics being indicative of possible events occurring in the pipe and analyzing the characteristics in said time windows and frequency bands for detecting said possible events. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification