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Distance measurement for wireless building automation devices

  • US 7,379,390 B2
  • Filed: 01/05/2007
  • Issued: 05/27/2008
  • Est. Priority Date: 09/09/2004
  • Status: Active Grant
First Claim
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1. A building automation device for determining distance after placement within a building, the building automation device comprising:

  • a sensor or an actuator operable for control of an environment of the building;

    an acoustic transceiver; and

    a radio frequency transceiver; and

    a processor operable to control the acoustic transceiver for distance determination operation in response to control signals from the radio frequency transceiver, the processor operable to process data of the sensor or actuator.

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