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Wireless communication device and wireless communication system that performs wireless communication with a counterpart device using a directional antenna

  • US 9,973,947 B2
  • Filed: 11/28/2016
  • Issued: 05/15/2018
  • Est. Priority Date: 05/30/2014
  • Status: Active Grant
First Claim
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1. A wireless communication device that performs wireless communication with a counterpart device using a directional antenna, comprising:

  • an imaging unit that has an optical axis which is identical to a radio wave direction of the directional antenna, and photographs images of regions corresponding to the counterpart device serving as a monitoring target;

    a storage unit that stores a reference image serving as a reference which is photographed by the imaging unit; and

    a control unit that performs a communication failure prediction process of acquiring a photographed image photographed by the imaging unit at regular intervals, calculating a degree of similarity between the photographed image and the reference image for each of the regions serving as the monitoring target through normalized cross-correlation, calculating an index value representing a state of the regions serving as the monitoring target based on degrees of similarity which is weighted, detecting an abnormality when the index value is a specific numerical value or less, and outputting alert information including the photographed image when a state in which the abnormality is detected is continued for a certain period of time;

    wherein the control unit sets a monitoring region including the counterpart device and a plurality of divisional blocks obtained by dividing an extended region obtained by extending the monitoring region as the region serving as the monitoring target, and in the communication failure prediction process, the control units calculates the degree of similarity between the photographed image and the reference image for the monitoring region and the plurality of divisional blocks, calculates an integrated index value in which the degrees of similarity of the monitoring region and the plurality of divisional blocks are integrated as the index value indicating the state of the region serving as the monitoring target, and detects the abnormality when the integrated index value is a threshold value which is set in advance or less.

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