Apparatus for detecting periodicity in time-series data
US5636128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1994 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Sep 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2218/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting periodicity in time-series data, which is to be processed, includes a specifying unit for designating positions of coordinates in n-dimensional phase space, which are indicated by incoming time-series data and time-series data of the number n-1 that have been already input, arranged in series with the incoming time-series data; an extraction unit for estimating the frequency of emergence in the positions of the coordinates, by taking into consideration a fluctuation in the time-series data, and extracting at least one characteristic point from the coordinates on the basis of the frequency of emergence; a detection unit for checking whether or not the characteristic point at the start point extracted by the extraction unit conforms to the characteristic point at the end point, and detecting periodicity information about the periodicity formed by every characteristic point extracted by the extraction unit; and an output unit for determining the periodicity in the time-series data on the basis of the thus detected periodicity information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.