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US 12,001,195 B2Granted
State evaluation system, state evaluation apparatus, and state evaluation method
AssigneesKabushiki Kaisha Toshiba, Toshiba Carrier Corporation
InventorsYoshinori Mori, Hidefumi Takamine, Kazuo Watabe, Hayato Toda
Life of this patent
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Abstract
A state evaluation system includes a sensor, a filter, a signal processor, and an evaluator. The sensor detects elastic waves which are generated from industrial equipment in operation. The filter can pass elastic waves having frequency characteristics based on abrasion which is generated in the industrial equipment. The signal processor extracts a plurality of feature values using the elastic waves passing through the filter. The evaluator evaluates an abnormality of the industrial equipment on the basis of a combination of the extracted plurality of feature values.
Claims6
A state evaluation system comprising:
- a sensor configured to detect elastic waves which are generated from industrial equipment in operation;
- a filter configured to be passable elastic waves having frequency characteristics based on damage which is generated in the industrial equipment;
- a signal processor configured to extract a plurality of feature values using the elastic waves passing through the filter;
- and
- an evaluator configured to evaluate an abnormality of the industrial equipment on the basis of a combination of the extracted plurality of feature values, wherein
- the evaluator is configured to
- generate a scatter diagram indicating a correlation between energy and duration of the elastic waves when the energy and the duration of the elastic waves are used as the plurality of feature values,
- draw an approximate straight line on the generated scatter diagram, the approximate straight line being derived from a correlation between the plurality of feature values acquired from the elastic waves, and
- determine that the abnormality of the industrial equipment exists using the elastic waves, when a proportion deviating from the approximate straight line, which is derived from the correlation between the plurality of feature values acquired from the elastic waves, is equal to or greater than a threshold value.
6 more elements
A state evaluation apparatus comprising:
- a filter configured to pass through elastic waves which are detected by a sensor that detects elastic waves which are generated from industrial equipment, which have frequency characteristics based on damage which is generated in the industrial equipment;
- a signal processor configured to extract a plurality of feature values using the elastic waves passing through the filter;
- and
- an evaluator configured to evaluate an abnormality of the industrial equipment in operation on the basis of a combination of the extracted plurality of feature values, wherein
- the evaluator is configured to
- generate a scatter diagram indicating a correlation between energy and duration of the elastic waves when the energy and the duration of the elastic waves are used as the plurality of feature values,
- draw an approximate straight line on the generated scatter diagram, the approximate straight line being derived from a correlation between the plurality of feature values acquired from the elastic waves, and
- determine that the abnormality of the industrial equipment exists using the elastic waves, when a proportion deviating from the approximate straight line, which is derived from the correlation between the plurality of feature values acquired from the elastic waves, is equal to or greater than a threshold value.
5 more elements
A state evaluation method comprising:
- passing through elastic waves which are detected by a sensor that detects elastic waves which are generated from industrial equipment, which have frequency characteristics based on damage which is generated in the industrial equipment;
- extracting a plurality of feature values using the elastic waves passing through;
- and
- evaluating an abnormality of the industrial equipment in operation on the basis of a combination of the extracted plurality of feature values, wherein
- the evaluating includes
- generating a scatter diagram indicating a correlation between energy and duration of the elastic waves when the energy and the duration of the elastic waves are used as the plurality of feature values,
- drawing an approximate straight line on the generated scatter diagram, the approximate straight line being derived from a correlation between the plurality of feature values acquired from the elastic waves, and
- determining that the abnormality of the industrial equipment exists using the elastic waves, when a proportion deviating from the approximate straight line, which is derived from the correlation between the plurality of feature values acquired from the elastic waves, is equal to or greater than a threshold value.
5 more elements
Dependencies are inferred from the claim text.