On Wed, 26 Jan 2005 01:54:48 +0000, bing2005
wrote:


Can anyone please tell me how did the speed transducer of SPEED2100
measure the speed of the boat?
I try to design my own display unit for this speed tranduscer. However,
i dont know the operation of the speed transducer, such as how i
calculate and measure the speed through the paddle wheel of the
transducer. When the paddle wheel is moving, how i going to know the
speed of the boat?
If anyone know, please tell me.
Thanks a lot!!!

The paddlewheel speed sensors I've seen had a small magnet in the
paddlewheel, and a coil in the sensor body. As the paddlewheel turns,
the magnet passes by the coil and produces a voltage or current pulse
in the coil. To measure speed, you just count pulses/time.




--
Peter Bennett VE7CEI
email: peterbb4 (at) interchange.ubc.ca
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