The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2018
Filed:
Nov. 28, 2016
Hitachi Kokusai Electric Inc., Tokyo, JP;
HITACHI KOKUSAI ELECTRIC, INC., Tokyo, JP;
Abstract
A wireless device includes an imaging unit having an optical axis which is identical to a radio wave direction of a directional antenna, a reference image is stored in a storage unit, a wireless communication device serving as a communication counterpart and an area around the wireless communication device are photographed at regular intervals, and a control unit compares images photographed at regular intervals with a reference image, calculates a degree of similarity through normalized cross-correlation which is hardly influenced by a change in brightness, calculates an index value indicating a state of a region serving as a monitoring target based on a degree of weighted similarity, detects an abnormality when the index value is a specific numerical value or less, and outputs alert information including the photographed image when a state in which the abnormality is detected is continued for a certain period of time.