What Is An And Its Function Explained
I still remember the days I saw some cups turning around a pole, and I asked my mom “what is that, mom?” My mom replied, “It lets you know the wind speed son.” After 15 years, I thought of writing an article About the Anemometer since I still remember those days. Anyway, this article is a summarized one, so forgive me if I have missed all the details.
Now I know what is an Anemometer and its unique function. It has a long history to talk about. Since its development, it hasn’t changed a lot from the design; which means, the original invention was a great one. Anyway, many types are there today. Around 1450, Leon Battista Albertian, an Italian architect invented the first practical device. In between, the history shows many developers of the Anemometer, but in 1846, Dr. John Thomas Romney Robinson created the first hemispherical cup meter. You can see Anemometers in every weather stations today.
Mainly, two types of Anemometers are there. As I said earlier, to measure the wind speed and to measure the wind pressure. Anyway, wind pressure and the velocity have a close relation so an Anemometer can give you both the readings.
How Cup Anemometers work?: It’s the simplest form. Still, it gives you very accurate readings. I used to have a one with some metal cups mounted on a wooden pole. Three-cup Anemometers are very common these days, and you can see a one in every weather station. It’s dead simple. As the wind gets stronger, the cups will rotate faster. You can get the values as a digital reading.
How Vane Anemometers work?: A picture can say a thousand words, so I thought of giving you a link to a picture of a Vane Anemometer (http://img.directindustry.com/images_di/photo-m2/187694-11020096.jpg.) It looks like a propeller. Unlike the Cup Anemometer mounted vertically, horizontally mounted blades measure the wind speed in Vane Anemometers.
How hot-wire Anemometers work?: It’s a modern creation. It has a thin wire that heats up by electricity to a temperature above the ambient. The blowing wind cools the wire. Since the electrical resistance depends on the temperature, a relationship between the wind speed and the resistance can give us a measurement of the wind speed. Tungsten is a top selection for the hot-wire.
Laser Doppler Anemometers, Ultrasonic Anemometers, and Acoustic Resonance Anemometers are the new types. The modern ones give very accurate measurements. Well, I am not here to say what type is the best, but it depends on personal choice. I still love classical types.
Application of the Anemometers:
1) The sailors use them to know the wind speed before heading the sea.
2) A windsurfer uses it to monitor wind conditions.
3) The farmers have it for many reasons.
4) Crazy fans like me use it for personal weather stations.
5) Meteorologists use it to know the strength of a storm.
Anyway, if you are planning to have your home weather station, use the Cup Anemometers. They are not that expensive to buy. I came across this website, and they sell many types of the meters for a reasonable cost (https://www.shopbot.com.au/handheld-anemometer/price/australia/537797.) If you like digital ones, options are available for you as well. Having a weather station in your home is a fun thing, trust me.