Determination of health status of systems equipped with sensors
US11471113B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 14, 2021 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Apr 14, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06N20/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for determining a health status of a system of interest is proposed. The method comprises acquiring (S1) a time series, extracting (S2) subsequences, selecting (S3) a set of subsequences, classifying (S4) the subsequences of the set into several groups on the basis of at least one criterion of resemblance to at least one reference subsequence, and constructing (S5) a normal operating model of the system of interest. The construction includes, for each group, a modeling (S51) of a representative subsequence and a determination (S52) of an associated weight. The normal model is defined by the modeled subsequences and the associated weights. The method further includes an attribution (S6) of a normality score to each subsequence extracted by comparison with the normal model, an identification (S7) of at least one abnormal subsequence, and a determination (S8) of the health status of the system of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.