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Monitoring system

  • US 9,679,460 B2
  • Filed: 03/19/2015
  • Issued: 06/13/2017
  • Est. Priority Date: 03/20/2014
  • Status: Active Grant
First Claim
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1. A monitoring system comprising:

  • a sensor coupled to a communicator; and

    a master device which, in operation, performs wireless communication with the sensor according to a wireless communications protocol, and is connected to a fixed telephone network to communicate with other fixed telephones, wherein the master device includes;

    a first communicator which, in operation, performs wireless communication via a wireless router with a smartphone that is connected to a mobile phone network to communicate with other mobile telephones,a second communicator which, in operation, receives detection signal from the sensor according to the wireless communications protocol,a controller which sets the master device in a first alert mode in response to detecting that the smartphone is outside a wireless communication range of the first communicator, and sets the master device in a second alert mode in response to detecting that the smartphone is inside the wireless communication range of the first communicator, andan alarm output which issues an alarm when the detection signal received from the sensor indicates an abnormal state;

    wherein an alarm output period, which starts when the master device begins to receive the detection signal indicative of the abnormal state and ends when the master device outputs the alarm, is set longer in the second alert mode than in the first alert mode.

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