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Multi-modal sensing

  • US 9,801,258 B2
  • Filed: 03/06/2015
  • Issued: 10/24/2017
  • Est. Priority Date: 03/19/2014
  • Status: Expired due to Fees
First Claim
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1. A controller comprising:

  • an output for controlling one or more lighting device to illuminate an environment;

    an input for receiving a signal output from a sensor of a first type and a signal output from a sensor of a second type, wherein the sensor of the second type consumes more power than the sensor of the first type; and

    a control module configured to detect motion of objects in said environment in response to receiving at least one of said signals, and control the one or more lighting device based on detected motion of objects in said environment, wherein the signal output from the sensor of the second type provides more accurate motion detection than the signal output from the sensor of the first type; and

    wherein the control module is configured to disable the sensor of the second type, and use the signal received from the sensor of the first type to detect motion of objects in said environment when higher traffic density of objects passing through said environment occurs, and use the signal received from at least the sensor of the second type to detect motion of objects in said environment when lower traffic density of objects passing through said environment occurs.

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