A motion detector, a luminaire, a corresponding method
AssigneeSignify Holding B.V.
InventorsSHOAIB HUSSAIN KHAN, MATTHEW STEVEN WHITEHILL, FETZE PIJLMAN
Life of this patent
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Abstract
Some embodiments are directed to a motion detector configured to classify an environment as quiet or motion. The motion detector is configured to estimate if the frequency bins in a motion signal correspond to a motion source in the environment or to a noise source in the environment. Some embodiments are directed to a luminaire comprising a motion detector.
Claims13
A motion detector configured to classify an environment as quiet or motion, the motion detector comprising:
- a signal input for receiving a sensor signal of a motion sensor,
- a processor configured to:
- convert the sensor signal to a frequency domain, obtaining a plurality of frequency bins,
- identifying frequency bins having an increased magnitude,
- estimating whether the identified frequency bins correspond to a motion source in the environment or to a noise source in the environment, by estimating an identified frequency bin with increased magnitude as caused by noise by determining that near frequency bins have no increased magnitude, wherein a frequency bin is near if a frequency difference between the near frequency bin and the identified frequency bin is below an upper frequency threshold and above a lower frequency threshold,
- determining from the identified frequency bins estimated as corresponding to a motion source whether the environment is classified as quiet or motion, by estimating an identified frequency bin with increased magnitude as corresponding to a motion source by determining that near frequency bins have increased magnitude and are not estimated as caused by noise and by determining that said identified frequency bin has a magnitude that exceeds a threshold value.
A motion detection method configured to classify an environment as quiet or motion, the motion detector method comprising:
- receiving a sensor signal of a motion sensor,
- converting the sensor signal to a frequency domain, obtaining a plurality of frequency bins,
- identifying frequency bins having an increased magnitude,
- estimating if the identified frequency bins correspond to a motion source in the environment or to a noise source in the environment, by estimating an identified frequency bin with increased magnitude as caused by noise, by determining that near frequency bins have no increased magnitude, wherein a frequency bin is near if a frequency difference between the near frequency bin and the identified frequency bin is below an upper frequency threshold and above a lower frequency threshold,
- determining from the identified frequency bins estimated as corresponding to a motion source if the environment is classified as quiet or motion, by estimating an identified frequency bin with increased magnitude as corresponding to a motion source, by determining that a near frequency bin has increased magnitude and is not estimated as caused by noise and by determining that said identified frequency bin has a magnitude that exceeds a threshold value.
Dependencies are inferred from the claim text.