A Vaavud™ wind meter will turn your smartphone into a high-tech meteorological tool. It enables you to take accurate wind readings and works on the most popular smart phones when using the free Vaavud App.
The design of the Vaavud™ Sleipnir wind meter is inspired partly by professional cup anemometers, and partly by a Danish developed wind turbine with vertical blades. An asymmetrical rotor accelerates slightly when the largest surface is hit by the wind. The built-in sensor makes 40.000 measurements per second allowing the app to detect even the slightest variations in wind speed. This high frequency signal can be used to derive both wind speed and direction.
The Vaavud™ App measures and displays wind speed in a popular units of measurement. It has a neat and clean interface that shows the most important wind characteristics: actual, mean and max wind speeds. The smoothed graph provides additional data on variations in strength as well as a quick overview. The graph supports both drag and pinch to zoom so data can be viewed in fine detail.
A live map gives you access to measurements made by other Vaavud™ users around the globe within the past 24 hours. You can zoom in to pinpoint the reading location and tapping on a map measurement reveals further details and other nearby measurements.
The Vaavud™ device has a wind range of 1 m/s up to 40 m/s. Precision is the least of +- 4% or 0.2 m/s. The wind meter has been tested and calibrated in a professional wind tunnel at the Technical University of Denmark. The cup anemometer design make it much less sensitive to the way you point the wind meter.
The Vaavud wind meter application works on iOS or Android smartphones. The electronic less signal transfer requires a magnetic field sensor, often called a digital compass, inside your phone. To be able to detect high wind speed this sensor needs to have a high update frequency. Vaavud has confirmed that the wind meter will work on these phones in the full working range.