DATA EXTRACTION METHOD
To provide a technique capable of extracting an abnormal waveform while reducing a data volume.SOLUTION: A data extraction method for extracting a part of data to be specified as an analysis target from time-series data of a physical quantity that increase when an apparatus of an analysis target is...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a technique capable of extracting an abnormal waveform while reducing a data volume.SOLUTION: A data extraction method for extracting a part of data to be specified as an analysis target from time-series data of a physical quantity that increase when an apparatus of an analysis target is operating and that have a tendency of having periodic patterns, includes: a calculation step of calculating a length of time of a section in which a value of the physical quantity of the time-series data is less than a first threshold value; and an extraction step of extracting data in a section not including a section in which a length of time is equal to or more than a second threshold value of the time-series data.SELECTED DRAWING: Figure 1
【課題】データ量を削減しつつ、異常波形を抽出できる技術を提供する。【解決手段】解析対象の機器が動作している場合に増大する物理量の時系列データであって、周期的なパターンを有する傾向を持つ物理量の時系列データから解析対象とすべき一部のデータを抽出するデータ抽出方法は、時系列データのうち物理量の値が第１閾値未満である区間の時間の長さを算出する算出工程と、時系列データのうち時間の長さが第２閾値以上である区間を含まない区間のデータを、抽出する抽出工程と、を備える。【選択図】図１ |
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