ANEMOMETER CALIBRATION HOW TO
ANEMOMETER CALIBRATION INSTALL
ANEMOMETER CALIBRATION CODE
ANEMOMETER CALIBRATION DOWNLOAD

ANEMOMETER CALIBRATION HOW TO

Be aware that True North is not the same as Magnetic North.Help the budding meteorologists in your classroom learn how to measure wind speed by building their own anemometers (wind speed meters) with paper cups and straws. Once the sensors have been calibrated it's just a matter of aligning the north-facing sensor due North with the aid of a compass. Listen to / view your local weather forecast and note the pipe deflection for various local wind speeds over a period of time then adjust the scale.Once you have this data it's just a matter of adjusting the scale. this should work providing the road is flat and level. Take the anemometer for a drive on a still day with a friend noting the deflection at different road speeds.Possible methods for calibrating the moving wind speed, short of a wind tunnel, include: the red disc will now appear as shown in photo 2.

ANEMOMETER CALIBRATION CODE

Copy these numbers to the North_offset and East_offset in Arduino code lines 52,53.Note the two right-hand numbers flowing down the processing screen.const float East_offset = 0.0 // distance (mm) from centre-line.const float North_offset = 0.0 // distance (mm) from centre-line.The following steps calibrate the zero wind speed reading. You will get a reading of 255 if an object is not detected.Once adjusted each sensor is able to measure distances down to 1mm from the sensor face.Instructions for calibrating each sensor may be found by reading the setup() notes in the Arduino file “laser_anemometer_sender.ino”.The data sheet indicates that this distance may be up to 15mm out.The VL6180X sensors are able to measure distances 1mm.The error message is harmless and appears if the input buffer has unexpected data. If you get a red error message click the Processing Stop button then click the Start button again. a display similar to photo 2 will appear. Open the “laser_anemometer_display” sketch.Reconnect your Arduino to your computer.Connect the VL6180X sensors to your Arduino.Save the sketch as “laser_anemometer_display” (without the quotes).Using a text editor such as Notepad++, copy the file contents to a new Processing sketch.

ANEMOMETER CALIBRATION DOWNLOAD

Download the attached file “laser_anemometer_display.pde”.

Compile and up load this file to your arduino.

Save the sketch as “laser_anemometer_sender” (without the quotes).

Using a text editor such as Notepad++, copy the file contents to a new Arduino sketch.

Download the attached file “laser_anemometer_sender.ino”.

ANEMOMETER CALIBRATION INSTALL

Left-click 'Install' to install the Pololu VL6180X library.

Type VL6180 in the search bar and wait for the above screen.

Left-click “Sketch | Include Library | Manage Libraries.

A multispeed hair-dryer is useful when testing.ĭownload and install the Pololu VL6180X library.

If too little is exposed the tube will require a large air flow before it will tilt.

If too much spring is exposed the tube will tend to oscillate much like a playground swing.

The amount of exposed spring determines the damping.

Mount the pipe vertically for testing.

Each of the remaining wires is attached to a sensor SHDN pin.

The second pair of wires is for SDA and SCL.

Feed three pairs of twisted wires through the hole and out of the tube.Drill a 5mm hole in the tube above the sensors.Before doing this read Step 5: Calibration below.Hot glue a VL6180X sensor to each of the plastic faces.Hot glue this plastic angle to the aluminium tube such that it will just be covered when the plastic downpipe (or bottle) is attached.Lightly score the center and fold to 90 degrees.Cut the length to twice the height of a VL6180X sensor.Cut 20mm from the bottom of an old credit card or similar.Fasten the spring in place using the self tapping screw.Push the other end of the spring down tube.the solder will not take to the spring but will prevent the nut pulling out. Press the M4 nut inside the coiled spring.Cut one loop off the end of the 11/16” extension spring (I used a diamond file).

Anemometer calibration