Sensors LED lighting intelligent control
Date:2011-06-09 11:16
Status:Be resolved
Question:admin
cts in recent years to get more applications. Ultrasonic sensors are using the Doppler principle, firing out through the crystal than the body can sense high-frequency ultrasound, generally the choice of 25 ~ 40kHz typical wave, then the control module detects the frequency of the reflected wave, if there is movement of objects within the region, frequency of the reflected wave will have minor fluctuations, the Doppler effect, in order to determine the illumination region moving objects, so as t
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