| Gallery, Projects and General > The Design Shop |
| Concept for anemometer...... |
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| crabsign69:
:worthless: :worthless: im interested |
| John Hill:
--- Quote from: crabsign69 on December 20, 2010, 12:15:46 PM --- :worthless: :worthless: im interested --- End quote --- Sorry:- |
| John Hill:
CS69, you mean you want me to actually make one of these? It will take a few hours to get organised... :med: |
| BillTodd:
How about.... Two magnets (or a light source) attached to a disk that rotates with the anemometer. Two reed switches(or optical sensors), one fixed to body operated by one of the magnet, one rotating on a disk moving with the wind vane operated by the other magnet. The output of the fixed switch (or sensor) can be connected to the Rxd (data receive) of a PC serial port, Each time it is activated it will generate a comport interrupt , which can be counted and integrated to give the wind speed. The output of the rotating vane switch can be taken to another serial port input (e.g. DSR - data set ready ?). The software has to time the delay between the RXD interrupt and the DSR pulse to determine the wind direction. BTW this is not a new idea I saw this scanning system in a anemometer some years ago in an electronics mag. Bill [edit] it occurs to me that there might be a way to channel the magnetic field (or light) to the centre of the vane thus avoiding the need for slip-rings and a second magnet. |
| benji:
--- Quote from: bogstandard on December 19, 2010, 11:50:30 PM --- What more do you need? Bogs --- End quote --- How long should the piece of string be? ::) |
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