Detecting passing valve activity in pipe systems

A system for detecting passing valves in pipe systems in oil and gas plants, the system

• comprising:
• a set of piezoelectric sensors configured to be attached to a pipe, at least a first piezoelectric sensor of the set positioned upstream of a valve and at least a second piezoelectric sensor of the set positioned downstream of the valve, the first piezoelectric sensor and the second piezoelectric sensor each configured to detect acoustic emissions from the valve;
• and
• a data processing system communicatively coupled to the set of piezoelectric sensors, the data processing system comprising one or more processors and a computer readable medium storing instructions that when executed cause the one or more processors to perform operations comprising:
• receiving acoustic emission data from the set of piezoelectric sensors;
• filtering the acoustic emission data using a bandpass filter;
• extracting features from the filtered acoustic emission data, the extracted features comprising time-domain features, frequency domain features, or both;
• predicting an operational state of the valve using a trained machine learning model that takes as input the extracted features;
• and
• in response to predicting that the operational state of the valve is a passing valve, performing a corrective action to resolve the passing valve.