Title:
MONITORING DEVICE, AND METHOD FOR CONTROLLING MONITORING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/138238
Kind Code:
A1
Abstract:
A state change detection unit obtains the data generation probability on the basis of the value of observation data, and the value of a parameter of a prior distribution, obtains, on the basis of the data generation probability, a run length probability distribution for when the time-series observation data acquired up to the current point in time is used as a condition, and detects a change in the state of a facility on the basis of the run length probability distribution. Furthermore, an update unit updates the value of the parameter of the prior distribution using the value of the observation data, to generate the prior distribution to be used for calculating the data generation probability at the next point in time. In cases when the current point in time is determined to be a point of change in the state of the facility, the state change detection unit also searches for a change indication point, i.e. a point in time at which an indication of the change in the state of the facility began to appear, on the basis of the run length probability distribution.
Inventors:
TASAKI HIROSHI (JP)
Application Number:
PCT/JP2016/086203
Publication Date:
August 17, 2017
Filing Date:
December 06, 2016
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
G05B23/02; G05B19/418
Foreign References:
| JPS6421509A | 1989-01-24 | |||
| JP2015169989A | 2015-09-28 | |||
| JPS5530045B2 | 1980-08-08 | |||
| JPS5530019B2 | 1980-08-07 |
Other References:
ADAMS ET AL.: "Bayesian Online Changepoint Detection", ARXIV.ORG, 19 October 2007 (2007-10-19), pages 1 - 4, XP080307392, Retrieved from the Internet [retrieved on 20170127]
MURPHY, KEVIN P, CONJUGATE BAYESIAN ANALYSIS OF THE GAUSSIAN DISTRIBUTION, vol. 1, no. 2 a 2, 2007, pages 16
"Pattern Recognition And Machine Learning (Information Science and Statistics", 2006, SPRINGER-VERLAG, pages: 8
See also references of EP 3416011A4
MURPHY, KEVIN P, CONJUGATE BAYESIAN ANALYSIS OF THE GAUSSIAN DISTRIBUTION, vol. 1, no. 2 a 2, 2007, pages 16
"Pattern Recognition And Machine Learning (Information Science and Statistics", 2006, SPRINGER-VERLAG, pages: 8
See also references of EP 3416011A4
Attorney, Agent or Firm:
SERA, Kazunobu et al. (JP)
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