Device for measuring wind speed
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United States of America Patent
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May 31, 2016
Grant Date -
Sep 27, 2012
app pub date -
Oct 11, 2010
filing date -
Oct 9, 2009
priority date (Note) -
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Abstract
A device comprises: an emitting element for emitting a laser beam, referred to as an emitted beam; a focusing element for focusing the emitted beam at a predetermined focal distance (D); a receiving element for receiving the emitted beam after being reflected by a particle in the air (18), referred to as a reflected beam; a transmitting element for transmitting the signal of interference occurring between the emitted beam and the reflected beam to a signal processor in order to deduce the speed of the particle therefrom. The emitting element includes a laser diode and the receiving element is combined with the laser diode by self-mixing. The focal distance is between 5 cm and 2 m.
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