Patent Document ID: 8930146
Application ID: 12919296
Patent Flag: 1

Claim One:
1. An apparatus state detector that detects states of a single or a plurality of apparatuses comprising: measuring means that measures a physical quantity of an environment in which the apparatus is placed; feature-quantity calculation means that calculates a feature quantity of the measured value measured by said measuring means; storage means that stores, in advance, a plurality of feature quantities of each apparatus and apparatus states associated with the feature quantities, respectively, as dictionary data; and apparatus-state detection means that searches for a feature quantity from said plurality of feature quantities in said dictionary data by using a feature quantity calculated by said feature-quantity calculation means as a search key and identifies an apparatus state based on the apparatus state associated with a retrieved feature quantity as a result of the search based on stored histories of the feature quantities for each apparatus, wherein said apparatus-state detection means is configured to calculate a difference between a first feature quantity, of said stored histories, which is calculated by said feature-quantity calculation means based on said measured value measured by said measuring means at a first time period and a second feature quantity, of said stored histories, which is calculated by said feature-quantity calculation means based on said measured value measured by said measuring means at a second time period, identify the calculated difference between the first feature quantity and the second feature quantity as a third feature quantity, using the third feature quantity as the search key, retrieve, from the dictionary data stored in the storage means, a stored feature quantity, from the stored plurality of feature quantities, that corresponds to said third feature quantity, and identify, a state of the apparatus based on an apparatus state that is stored, in the storage means, in association with the retrieved feature quantity.