Hifi Engineering Inc.

David Westwick

Seyed Ehsan Jalilian

Arne Dankers

Methods, systems, and techniques for determining whether an acoustic event lias occurred along a fluid conduit iliat lias acoustic sensors positioned along its length. For each of the sensors, a processor is used to determine a linear relationship between a measured acoustic signal measured using the sensor and a white noise acoustic source located along a longitudinal segment of the fluid conduit overlapping the sensor. From the linear relationship, the processor determines an acoustic path response that includes an acoustic response of the longitudinal segment and an acoustic source transfer function dial transforms the white noise acoustic source. Over time, variations in the acoustic path responses and/or acoustic source transfer functions are monitored. When the event threshold is exceeded, the acoustic event is identified as having occurred along the longitudinal segment corresponding to the acoustic path response or acoustic source transfer function that varied in excess of the event threshold.

Method and system for detecting whether an acoustic event has occured along a fluid conduit

Methods, systems, and techniques for determining whether an acoustic event has occurred along a fluid conduit having acoustic sensors positioned therealong. The method uses a processor to, for each of the sensors, determine a predicted acoustic signal using one or more past acoustic signals measured prior to measuring a measured acoustic signal using the sensor; determine a prediction error between the measured acoustic signal and the predicted acoustic signal; from the prediction error, determine a power estimate of an acoustic source located along a longitudinal segment of the fluid conduit overlapping the sensor; and determine whether the power estimate of the acoustic source exceeds an event threshold for the sensor. When the power estimate of at least one of the acoustic sources exceeds the event threshold, the processor attributes the acoustic event to one of the sensors for which the power estimate of the acoustic source exceeds the event threshold.

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Calgary, Canada

David Westwick