Abnormality detection method and abnormality detection apparatus
US11762035B2 · kind B2 · utility
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Key dates
| Filing date | May 31, 2022 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | May 31, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An abnormality detection method according to one aspect of the present disclosure is a method of detecting an abnormality in an AC signal to be input from an AC power supply. The method includes, where an ideal AC signal is represented as V0 sin ωt (V0: amplitude, co: angular frequency, t: time), calculating an arithmetic value including a value represented by sin2ωt+cos2ωt and determining that the AC signal is abnormal when the arithmetic value is out of a threshold range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.