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ASSOCIATION OF A PORTABLE SENSOR DEVICE IN A BUILDING MANAGEMENT SYSTEM

  • US 20150134085A1
  • Filed: 04/18/2013
  • Published: 05/14/2015
  • Est. Priority Date: 04/19/2012
  • Status: Active Grant
First Claim
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1. A method for associating a portable sensor device with a stationary control device in a building management system comprising a plurality of stationary control devices being connected in a network, and a portable sensor device being associated with one of the stationary control devices, wherein the portable sensor device in a first mode transmits a signal occurring at a first frequency to its associated stationary control device so as to provide its associated stationary control device with sensor data, the method comprising:

  • detecting a movement of the portable sensor device, whereby the portable sensor device changes from the first mode to a second mode in which the portable sensor device transmits a signal occurring at a second frequency being larger than the first frequency;

    receiving the signal transmitted by the portable sensor device occurring at the second frequency by at least one of the stationary control devices, wherein the received signal at each of the receiving stationary control devices is associated with a received signal strength;

    determining if the received signal strength of each of the receiving stationary control devices is essentially constant during a time window, thereby determining if the movement of the portable sensor device has stopped; and

    in case the received signal strength of each of the receiving stationary control devices is essentially constant during a time window, associating the portable sensor device with the stationary control device having the highest received signal strength, whereby the portable sensor device returns to the first mode.

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