Barometer is what device

In the seventeenth century, mankind became known and proved the fact that the air has a certain weight. The assumption of its pressure on various items was proven with a special device - barometer. It will be discussed in this article.

Device that determines air pressure

To begin with, we will define. The barometer is an instrument for measuring a certain air pressure on items. His inventor was E. Torricelli. In 1644, the barometer was a rutty tube and a measuring scale. A day, when the barometer tests were carried out, the mercury level was at a mark of 760 mm, which served as a reason to count the mark at this level by normal pressure. Such devices are still used by meteorological stations.

Two centuries, after the invention of the mercury barometer, as a result of a plurality of studies, a fundamentally new nice look was constructed by luciente. Subsequently called barometer aneroid. Throughout the existence of the aneroid, many users have gained great popularity, because they have a small size, easy and accurate. Compared with mercury barometers - the aneroids are completely safe to use.

Types of barometers

Mercury - device measuring pressure. The principle of operation lies in the movement of mercury, relative to the applied scale.

Liquid - the device by which the pressure level is measured by equilibrating the weight of the fluid column atmospheric pressure.

Barometer aneroid - the principle of operation and the display of indicators is based on the change in the size of a hermetic metal box filled with rare air, under the action on its surface of the atmospheric pressure.

Electronic is a modern type of device that converts linear indicators of a classic aneroid into an electronic signal. Microprocessor-processed signals are displayed on a LCD screen.

The barometer aneroid is the most common of the above devices, due to its small size and lack of fluids in the mechanism. Consider it in more detail.

The structure of the atmospheric barometer

Round silver-nickel plate.
Box with ribbed bases.
Transmission mechanism.
Return spring.
Indicating arrow.

Atmospheric barometer - work principle

In the assembled view, aneroid is a box with various mechanisms. When a certain amount of air is pumped out of it, it creates a strong discharge of the return spring, the index arrow and the transfer of the mechanism between them. Under the action of pressure of the wall "Bococamera" is reduced or increased in size, and the index arrow begins to move relative to the measuring scale towards increasing or decreased pressure, respectively. In a calm state, the arrow will be at 760 mm.

Self-surviving barometer

Used to record meteorological data regarding atmospheric pressure oscillations. In other words, this is an advanced barometer-aryeroid, with the addition of a clockwork in the barocamer, the device holding a charting paper and an arrow-drive that inflicts the paper ink line.

The image of the "drawing" on the paper is called the Barogram. During the work of the barrogram, in accordance with the hourly indicators, the mechanism wounds on its base special paper, on the surface of which slides and notes the indicators of atmospheric pressure deviations attached arrow with ink.

Indicators of pressure discrepancies are fixed constantly. For meteorologists, this is the main documentary of the weather in the near future. Depending on the size of the drum - the duration of the recording of the recording can be from several hours to one week. A special design allows you to take indicators and follow the atmospheric indicators at any time.

Barometer in the phone - what is it

Technologies do not stand still, and now measure the atmospheric pressure using a mobile device. Many users of modern gadgets, encountered with a new feature, are wondering - a barometer in the phone, what is it? Modern miniature meteorological station allows the user to constantly check the level of atmospheric pressure in electronic form. After tracking the pressure indicators for a certain time, you can find out - the cyclone or anticyclone is approaching. These indicators will be useful for people with increased sensitivity to sharp pressure drops.

The capabilities of the mobile device do not stop at this. In electronic form, it shows the height, geographical width and longitude, which, in turn, contributes to the rapid search for the device and determining the exact location of its location. Thanks to the GPS satellites, the process is fast and accurate. Mobile barometer is a precise altimeter. The accuracy of determining the finding of the user is reduced to the radius of 3 meters. With such devices, climbers in the mountains are used. But they acquired great popularity in the aviation sphere.

Barometer built into hours

Appeared relatively recently. Few know why this device, and most wondering - a barometer in the clock, what is it?

We will try to figure out. The barometer in certain types of clock is represented in electronic or mechanical form. Electronic species - no different from the supply of atmospheric pressure and their output on the screen, like on the phone. The clock with a mechanical pressure mapping is an ideal accurate mini-copy of the aneroid. The difference in the simplified scale of display display. The cost of clock-barometers is large enough, but, as a rule, they are shockproof and waterproof.

"Non-standard barometer"

Thanks to its founders, he is called Harvard. The economic barometer underlies the formation of econometrics. Predicts the change in the conjuncture, the dynamics of supply and demand, etc. Harvard barometer is a description of empirical patterns and extrapolation over the past months of observation. The study includes the study of the dynamics of development of different indicators of the economy.

Development forecast was displayed in graphical form. Each curve line caused to the chart displays one or another. For example, the "A" curve displays changes in average exchange courses (stock market); The curve "B" displays the index of wholesale prices and changes in turnover (production); The "C" curve - reflected growth or decline in the securities course in the money market. In the perfect condition of the graph - the indicators "A" and "C" should coincide at the level of the maximum of the first unit and the minimum of the curve of the second unit.

Thanks to the leadership of W. Persons and W. Mitchell - this kind of instrument was used until 1925. Harvard Barometer Mitchell is the first powerful regulator and indicator of factors in the national economy of the country. Considering the popularity and effectiveness of such construction and display of facts - this method adopted many countries around the globe. But the prospect of the development of many countries on this ratio of indicators in the economy did not exist for a long time, because before and after the Second World War, they became irrelevant in percentage ratio. The economy of all countries who participated in the war were in full decay, and to solve the raising "from the knees" each country used its methods to stabilize their own monetary currency. The old methods of raising indicators (withdrawal from the crisis) were not applied at all, but the foundations laid down by Mitchell became a precedent for the global economy.

Manometer

It is worth noting another device that also measures pressure, only not air, and gases and liquids - this device is called a pressure gauge. These two devices are very interrelated. The amount of testimony of the pressure gauge and barometer is an absolute pressure, which has a greater indicator than atmospheric.

Conclusion

In the modern world, the barometer is one of the main devices of meteorology. The marked indicators on paper helps many people learn about the upcoming changes in atmospheric pressure, respectively, to prepare them. It is more touched by hypertensive. The barometer is an optional subject in the house, but as an auxiliary element or in addition to the interior - desirable. Modern framing such a desired device allows it to enter into any interior solution.