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Flow sensing system and method

  • US 8,721,132 B2
  • Filed: 11/02/2011
  • Issued: 05/13/2014
  • Est. Priority Date: 11/02/2011
  • Status: Active Grant
First Claim
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1. A flow sensing system, comprising:

  • a multiplicity of devices distributed at different locations within a three-dimensional space, each of the devices comprising;

    a housing;

    a light source coupled to the housing and configured to emit visible light;

    a sensor system coupled to the housing, the sensor system including an air flow sensor subsystem sensing an air flow rate through the housing; and

    a device controller coupled to the sensor system and the light source and configured to activate the light source in response to a change in the sensed air flow rate, which is greater than a predefined threshold amount, provided by the sensor system.

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