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Systems and methods for detecting changes in energy usage in a building

  • US 10,261,485 B2
  • Filed: 10/23/2015
  • Issued: 04/16/2019
  • Est. Priority Date: 06/22/2009
  • Status: Active Grant
First Claim
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1. A building management system comprising:

  • a plurality of sensors measuring a physical state or condition of a building and generating sensor data indicating the physical state or condition measured by the plurality of sensors; and

    a controller that uses first sensor data from the plurality of sensors collected during a first time period to generate one or more first model coefficients for an energy usage model for the building;

    wherein the controller uses second sensor data from the plurality of sensors collected during a second time period to generate one or more second model coefficients for the energy usage model;

    wherein the controller calculates a difference between the first model coefficients and the second model coefficients, generates a test statistic based on the difference, and compares the test statistic with a critical value;

    wherein the controller automatically identifies a change in the building'"'"'s energy usage and updates the energy usage model by replacing the first model coefficients with the second model coefficients in response to the test statistic exceeding the critical value;

    wherein the controller uses the energy usage model with the second model coefficients to generate and transmit control signals to building equipment that operate to affect the physical state or condition of the building in response to replacing the first model coefficients with the second model coefficients.

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