Talk:Anemometer

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Untitled

While the 1911 information may have been useful in its time, I would consider the bulk of this article to be at best highly misleading. --scruss 17:11, 31 Jan 2005 (UTC)

Removed following uncited / conflicting info

I removed:

The first anemometer was invented by [[Leone Battista Alberti]] in the 15<sup>th</sup> century. It was later re-invented by a Englishman by the name of Robert Hooke who is often mistakenly considered the inventor of the first anemometer.

as 1) neither article contains the claim they invented the first anemometer, and 2) the generic statement doesn't match up with the categorized anemometer types (i.e. which type did they invent). - Davandron | Talk 21:07, 16 April 2007 (UTC)[reply]

I added: the inventor of the three cup anemometer (Patterson), Aberti & Hooke under flat plate anemometer, and Dines under pressure port anemometer Ken Devine

Topic should be broadened

This is a very poor report on this measurment explain

Anemometer: An instrument to measure the speed or velocity of gases either in a contained flow, such as airflow in a duct, or in unconfined flows, such as atmospheric wind. To determine the velocity, an anemometer detects change in some physical property of the fluid or the effect of the fluid on a mechanical device inserted into the flow.

Anemometers, I believe, have equally important applications in HVAC testing equipment and other testers for flow speed of various gases.

167.115.255.20 13:17, 29 June 2007 (UTC)LINKBook[reply]

Medicine

Anemometers are used in medicine? Can that allusion be expanded? I've never heard of such a thing. Victor Engel (talk) 20:13, 18 May 2011 (UTC)[reply]

I don't believe this can be a major use. Consequently, and also because a couple of facts have been deleted from the lede, I shall more-or-less revert this edit (but not restoring the bit about building an anemometer being an easy project). --catslash (talk) 11:45, 19 May 2011 (UTC)[reply]

"I don't believe this can be a major use." It certainly is; for someone with lung disease, blowing into an anemometer to measure peak flow is a standard test. This is followed up over a period of time to measure the progression.

A medical anemometer is usually a different kind of device. It is actually measuring pressure, not free air speed (ping pong ball in vertical tube type). The type that uses a propeller (vane) measures air speed. Drbits (talk) 22:20, 2 September 2017 (UTC)[reply]

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Sonic anemometer

It is about: "Most recently, in 1994, Dr. Andrews Pflitsch developed the sonic anemometer.[2]"

The source is wrong, and therefore the content of this phrase is erroneous. Sonic anemometer were already used ten years before, like in this paper from 1984: Hay, J. S., 1984. Analysis of Wind and Response Data from the Wye and Erskine Bridges and Comparison with Theory.

Consequently, I suggest to remove this information

152.94.27.12 (talk) 14:18, 24 February 2014 (UTC)[reply]

Ping-pong ball anemometer

Maybe that section could use a more detailed explanation, emphasizing that the weight (2.7 grams) and diameter (40 mm) of the ball determines the angle at a given wind speed. Unfortunately I have been unable to find a source for that, most sites don't give any explanation, and one site I saw got it completely wrong: education.com writes "Use the table below to find out the wind speed. This can be calculated because we know the length of the string to be 30 centimeters." (http://www.education.com/science-fair/article/earth-science_building-anemometer/)... In fact the angle is independent of the length of the string (assuming the string weight and air resistance are small enough to be ignored). Ssscienccce (talk) 11:56, 7 July 2014 (UTC)[reply]

There are three forces on the system: The wind exerts a force on the ball (and the string) proportional to the area of the ball (and air capturing area of the string) times the square of the wind speed (assumed to be horizontal). The gravitational force (assumed to be downward) is the weight of the ball plus the weight of the string. The vertex (where the string is attached) maintains the reciprocal force (for every force, there is an equal and opposite reciprocal force). Using a strand of silk allows ignoring the forces on the string.

A right triangle is formed by the gravitational force (the vertical), the wind force (horizontal), and the string is the hypotenuse. The angle is independent of the length of the string because the other two sides are proportional to the length of the hypotenuse. The tangent of the angle is proportional to the ratio of the wind force divided by the gravitational force. This is easiest graphed by experimentation, but can be calculated from the formula. Drbits (talk) 22:41, 2 September 2017 (UTC)[reply]

Suggestion to delete 3rd paragraph of "Vane anemometers"

The third paragraph of the section "Vane anemometers" doesn't make sense. It appears to be about measuring wind speed in a situation where the direction of the air flow is fixed, but then proceed to say that an "air vane" or an "air meter" can be used. The former is a device for measuring wind direction, the latter is a device for pumping air (e.g. pumping car tires).

Please just explain this, don't delete it. Typically, a Vane Anemometer for wind measurement is attached to the end of a weather vane (which moves the propeller downwind). Drbits (talk) 22:23, 2 September 2017 (UTC)[reply]

External links modified

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Proposed Solid State Anemometer

By using strain gauges, a fixed vertical rod with a ball on the top can be used to measure the speed and direction of the wind. The rod is clamped tightly at the bottom and three to eight strain gauges are attached to the sides of the rod. The bend of the rod measures the pressure on the ball (proportional to the square of the wind velocity). The wind direction is measured by triangulation of the output of the strain gauges.

The advantage is that there are no rotational points to wear out or get clogged with dirt. Currently, this is just a laboratory experiment, but it could significantly reduce the cost of maintaining automated weather stations. The idea comes from the Vortex Bladeless Wind Turbine ^[1] Drbits (talk) 23:08, 2 September 2017 (UTC)[reply]

References

^ https://www.wired.com/2015/05/future-wind-turbines-no-blades/

Wind speed

St.laia 104.255.253.151 (talk) 21:45, 24 November 2021 (UTC)[reply]

Science

Write the following lines Ame wometer 103.57.85.140 (talk) 07:50, 17 June 2022 (UTC)[reply]

"The anemometer has changed little since its development in the 15th century"

says the article, and then goes on to describes a dozen types of sensors that have absolutely nothing to do with their 15th century version, except for their use. 2A02:8071:2289:CAC0:593E:1CF1:B947:4867 (talk) 13:51, 21 December 2023 (UTC)[reply]

[1] ttps://www.wired.com/2015/05/future-wind-turbines-no-blades/

[1]