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Visual and auditory user notification methods for smart-home hazard detector

  • US 9,836,953 B2
  • Filed: 07/25/2016
  • Issued: 12/05/2017
  • Est. Priority Date: 10/07/2013
  • Status: Active Grant
First Claim
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1. A hazard detector for providing a pre-alarm of a hazardous condition, the hazard detector comprising:

  • a hazard sensor that measures a hazard level, the hazard sensor measuring at least one of smoke and carbon monoxide (CO);

    a storage module configured to store a pre-alarm threshold, the pre-alarm threshold being less than an emergency threshold;

    a light source that generates light;

    a speaker that generates audible sound;

    a user interface module in communication with a processing module, the user interface module being configured to receive user input;

    a horn that generates an audible alarm at a higher volume than the speaker; and

    the processing module in communication with the hazard sensor, the storage module, the light source, the speaker, and the horn, the processing module being configured to;

    compare the measured hazard level with the pre-alarm threshold,compare the measured hazard level with the emergency threshold,determine that the measured hazard level is greater than the pre-alarm threshold and that the measured hazard level is less than the emergency threshold,generate audible pre-alarm speech via the speaker in response to determining that the measured hazard level is greater than the pre-alarm threshold and less than the emergency threshold,activate the light source in response to determining that the measured hazard level is greater than the pre-alarm threshold and less than the emergency threshold,receive the user input from the user interface module, andstop generating the audible pre-alarm speech in response to receiving the user input.

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