Method for detecting defects in a tube heat exchanger
AssigneeElectricite de France
InventorsJoseph Mure, Nicolas Paul, Loïc Vallance
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Abstract
A method for maintaining a tube heat exchanger includes: obtaining measurement signals resulting from the passage of a measurement probe in the tubes of the heat exchanger, determining a reference time series corresponding to an average, at each instant, of the measurement signals, synchronising each measurement signal with the reference time series by applying a dynamic time warping, DTW, to said measurement signal and the reference time series, and searching for a potential anomaly by measuring a potential local deviation of a measurement signal with respect to the other measurement signals.
Claims6
A method for maintaining a tube heat exchanger, comprising:
- obtaining measurement signals resulting from the passage of a multifrequency eddy-current measurement probe in the tubes of the heat exchanger, wherein each measurement signal is a multidimensional time series comprising P components, P being a natural integer greater than or equal to 2,
- determining by a processor of a computer a reference time series corresponding to an average, at each instant, of the measurement signals and comprising P components,
- synchronising each measurement signal with the reference time series by applying a dynamic time warping, DTW, to said measurement signal and the reference time series multidimensionally on the P components simultaneously, and
- searching for a potential anomaly by measuring a potential local deviation of a synchronised measurement signal with respect to the other measurement signals synchronised with the reference time series.
Dependencies are inferred from the claim text.