Data processing device and method

A data processing method that determines whether a fluid leaks from a pipeline network of the fluid based on a waveform of a vibration intensity measured from the pipeline network, the data processing method comprising:

• by a data processing device that includes a memory and a processor,
• acquiring a plurality of pieces of waveform data of vibration intensities measured at different times from the pipeline network;
• calculating an evaluation value for evaluating how suitable or unsuitable the plurality of pieces of waveform data are for determining a presence or absence of a fluid leakage;
• selecting waveform data to be used for determining a presence or absence of a fluid leakage from the plurality of pieces of waveform data based on the evaluation value;
• extracting a periodic characteristic from an autocorrelation coefficient of a vibration intensity of the selected waveform data;
• and
• determining whether the fluid leaks from the pipeline network based on a relationship between periodic characteristics of the selected waveform data, wherein
• the evaluation value is a value calculated based on at least one of a maximum amplitude of a vibration intensity, a vibration intensity in a specific frequency band, an integrated value of vibration intensities, and a time differential of vibration intensities.

A non-transitory computer readable medium upon which is embodiment programmed instructions which, when executed by a processor, cause the processor to perform operations to determine whether a fluid leaks from a pipeline network of the fluid based on a waveform of a vibration intensity measured from the pipeline network, the operations comprising:

• acquiring a plurality of pieces of waveform data of vibration intensities measured at different times from the pipeline network;
• calculating an evaluation value for evaluating how suitable or unsuitable the plurality of pieces of waveform data are for determining a presence or absence of a fluid leakage;
• selecting waveform data to be used for determining a presence or absence of a fluid leakage from the plurality of pieces of waveform data based on the evaluation value;
• extracting a periodic characteristic from an autocorrelation coefficient of a vibration intensity of the selected waveform data;
• and
• determining whether the fluid leaks from the pipeline network based on a relationship between periodic characteristics of the selected waveform data, wherein
• the evaluation value is a value calculated based on at least one of a maximum amplitude of a vibration intensity, a vibration intensity in a specific frequency band, an integrated value of vibration intensities, and a time differential of vibration intensities.