ULTRASONIC MOTION SENSOR DEVICE
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United States of America Patent
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Issued Date -
Nov 14, 2013
app pub date -
May 3, 2013
filing date -
May 8, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An ultrasonic motion sensor device for lighting control, having a housing (10), preferably designed for ceiling-mounting, at least one ultrasonic transducer (11, 14) arranged in the housing (10) for sending and/or receiving ultrasonic waves through a housing opening associated with the ultrasonic transducer (11, 14), and having a control device (9) associated with the ultrasonic transducer (11, 14). The opening in the housing is formed by a horn which is spaced apart from the ultrasonic transducer (11, 14) via a resonator cavity arranged in the housing (2) and an impedance opening (21) is provided, preferably bounded by the horn, which the emitted and/or received ultrasonic waves (11, 14) are to pass through, the cross-sectional area (18) of which is less than a maximum cross-sectional area of the resonant cavity and than a maximum cross-sectional area of the horn.
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