What Does anemometer Mean
An anemometer is a device that is used in the field of meteorology to measure the intensity of the wind .
Anemometers have several blades equipped with cups, which look like small metal bowls: when the wind blows, the blades of the anemometer start to rotate. Registering the number of turns allows the wind speed to be calculated .
Anemometers of this type, which are also known as vane anemometers , are the most widely used in the field of meteorology. Depending on the model, reading and recording the number of turns the wind makes in the small mill is done differently, and this also leads to different names for anemometer. This variety is typical of inventions as old as this one.
In some cases, this value can be reflected directly on a counter, or printed on a strip of paper (which is called an anemogram ), and there are also absolutely electronic devices, which have digital screens to express the results. When the anemometer has a graphical recorder, it is called an anemograph .
There are, however, other types of anemometers. In airplanes, anemometers equipped with a nickel or platinum wire that is heated by electricity are used . The wind, when cooling it, produces a change in its resistance. In this way, the current that runs through the wire is proportional to the speed reached by the wind.
There are devices of this class that use a splitting laser beam . The return of the laser to the anemometer is slower due to the air molecules : the difference that is registered between the relative radiation in the anemometer and the return of the radiation makes it possible to estimate the speed of these air molecules.
Also called anemometer to the device that, in airplanes, is used to calculate the speed of displacement. In this case, the anemometer has a different look and feel, allowing dynamic pressure (i.e. air impact) and static pressure to be compared using a Pitot tube .
It is known as a Pitot tube to a combined intake created in 1732 by the engineer Henri Pitot that is used to calculate the total pressure (also called backwater, remaining or stagnation ), which is equal to the sum of the static and dynamics .
It should be noted that the Beaufort scale makes it possible to qualify, according to the wind speed detected by the anemometer, if there is calm, breeze, strong wind, storm or hurricane , among other states.
The Beaufort scale
Around 1805, the English hydrographer and naval officer Sir Francis Beaufort created the scale that bears his name; Until then, naval officers were restricted to the results of their own observations, which they carried out with some regularity, but were not based on any scale, and therefore their measurements lacked objectivity.
At first, the Beaufort scale did not include the different values of the wind speed, but rather indicated a series of qualitative conditions according to the repercussion that these could have on the handling of the vessels, and assigned them a number from zero to the twelve, the smallest being "barely sufficient for maneuvering" and the largest, "impossible for the sails to hold."
Over time, this scale became an essential part of the British Navy logs and since the 1850s it has transcended the limits of naval use, thanks to the association of its values with the number of rotations provided by the anemometer.