| CPC G05B 19/418 (2013.01) [G06F 18/214 (2023.01); G06Q 50/04 (2013.01)] | 8 Claims |
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1. A production equipment monitoring system, comprising:
a computer configured to:
determines an anomaly index of a production equipment, based on a feature quantity obtained from an equipment information on the production equipment;
determines a degree of relevance between each of a plurality of anomalous conditions predicable to occur in the production equipment and an observed condition of the production equipment;
determines a single detection threshold for detecting a degree of anomaly of the production equipment, based on a plurality of anomaly thresholds which are thresholds of the anomaly index corresponding respectively to the plurality of anomalous conditions, and on the degree of relevance;
detects the degree of anomaly of the production equipment, based on the anomaly index and the detection threshold; and
notify a degree of anomaly of the production equipment, wherein
when the anomalous condition whose degree of relevance with the observed condition is the highest is referred to as a first anomalous condition, and the anomalous condition whose degree of relevance with the observed condition is the second highest is referred to as a second anomalous condition,
the computer is configured to determine the detection threshold by interpolating between the anomaly threshold of the first anomalous condition and the anomaly threshold of the second anomalous condition, based on a Mahalanobis distance between the first anomalous condition and the observed condition, and on a Mahalanobis distance between the second anomalous condition and the observed condition, and
the computer is configured to notify the degree of anomaly of the production equipment so as to support a person who manages the production equipment to make a determination, before failures occur, on the maintenance timing and the maintenance target of the production equipment.
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