Do you want to set up a weather station, have you built a wind turbine and want to know how fast the wind is blowing? making an anemometer and it's easier than you think.
– Motor CC de imánes permanentes.
– 4 mitades de huevos Kinder.
– 3 trozos de barillas de acero.
– 3 tuercas para las barillas.
– 3 tornillos para el montaje del motor.
– 1 tubo para el mástil con un diámetro interno igual al del motor.
– 1 trozo redondo de plástico para usarlo de protector, con un ancho de 0,5 cm como mínimo y un diámetro superior al del motor.
– Cable conductor (el de teléfono puede valer).
First of all, we will solder the wires to our motor to make sure it is ready and that later it will not be too short or we will not be able to place it. Then we put the motor on our mast, here we can see a picture of it:
As is normal, the anemometer will be outdoors and we must protect our motor from inclement weather, so just above the motor, we will fix a piece of plastic with a diameter greater than that of the motor, and the motor itself will be fitted inside the mast. As a clarification, the protective plastic must be very close to the mast tube, but without touching it so as not to interfere with the measurement and cause resistance to the motor.
Then we will place one of the Kinder egg halves in the centre to give uniformity to the wind and for the threaded rods, we will make three holes in the edge of the protective plastic (at 120º each), where we will place them with their corresponding Kinder egg halves and their nuts to prevent them from coming off.
Physically we will have finished our anemometer, now all that remains is the calibration and the electronics.
To calibrate our anemometer, we must choose a day with zero wind, this is very important in order not to falsify the measurement. We can use a car to make our measurements and make a table like the one below, with the data of speed and tension:
Afterwards, we will build the circuit and design the board that will control the data provided by the anemometer, here are the diagrams:
If you want to see the original page of the invention in English.