Patent attributes
There is described a motion detection system of a building automation system comprising a motion sensing component and a processor. The motion sensing component is configured to generate a raw signal. The processor is configured to establish first-order difference signals based on the raw signal. The processor is also configured to identify in-band energy in a motion portion of a sensor frequency range based on the first-order difference signals and identify total energy in the sensor frequency range based on the first-order difference signals. In addition, the processor is configured to determine a ratio of the in-band energy and the total energy and generate a motion status update in response to determining that the ratio meets or exceeds a predetermined ratio threshold.
