Name: manometers and gauges for fluid pressure
Uploaded: 2025-02-13T15:43:11.000Z
Duration: 1 min 16 s
Channel: JoVE

La pressione del fluido viene misurata utilizzando colonne di liquido in tubi, verticalmente o con inclinazione, denominate manometri. L'altezza della colonna di liquido determina la differenza di pressione.
Il manometro più semplice è un tubo piezometrico utilizzato per misurare la pressione. Si tratta di un tubo verticale aperto nella parte superiore e collegato a un contenitore, che utilizza lo stesso fluido per indicare la pressione nel tubo.
Un altro manometro comunemente usato è il manometro a tubo a U, che consiste in un tubo a forma di U collegato alla sorgente del fluido. Contiene un fluido diverso, chiamato fluido manometro, che non si mescola con il fluido di cui viene misurata la pressione.
Il manometro a tubo inclinato ha una gamba inclinata, contenente fluido manometrico che non si mescola con il fluido misurato, e la differenza di pressione viene letta lungo l'inclinazione per una maggiore sensibilità.
I manometri a tubo a U e a tubo inclinato sono comunemente usati per misurare la differenza di pressione tra due contenitori o punti all'interno di un sistema.
Altri manometri includono il manometro Bourdon, che misura la pressione di fluidi o gas, e il barometro aneroide, che misura la pressione atmosferica.

misurazione della pressione di un fluido

Measurement of Fluid Pressure

La pressione di un fluido, viene comunemente misurata utilizzando dispositivi chiamati manometri, che si basano su colonne di liquido per indicare le differenze di pressione. L'altezza di una colonna in un manometro, riflette la pressione esercitata dal fluido, fornendo un mezzo di misurazione semplice ma efficace. Diversi tipi di manometri servono a scopi specifici, in base alle loro configurazioni e al tipo di fluidi coinvolti.

Una forma base di manometro, è il piezometro, un tubo verticale aperto nella parte superiore e riempito con lo stesso fluido di cui viene misurata la pressione. Quando collegato a un contenitore di fluido, l'altezza del fluido nel tubo è direttamente correlata alla pressione all'interno del contenitore. Per applicazioni più complesse, il manometro a tubo a U, utilizza un tubo a forma di U riempito con un fluido di riferimento, che non si mescola con il fluido misurato. Questa configurazione consente misurazioni della pressione differenziale tra due punti.

Un'altra variante è il manometro a tubo inclinato, che presenta un ramo inclinato. Questo, aumenta la sensibilità allungando la scala di misurazione lungo l'inclinazione, consentendo letture precise di piccole differenze di pressione.

Oltre ai manometri, ci sono altri strumenti per misurare la pressione atmosferica e dei fluidi. Il manometro Bourdon, ad esempio, è ampiamente utilizzato per misurare la pressione di gas o liquidi in varie applicazioni industriali, mentre il barometro aneroide, misura la pressione atmosferica ed è comunemente utilizzato nelle previsioni meteorologiche e nelle misurazioni d'altitudine.

Misurazione della Pressione di un Fluido

La pressione del fluido viene misurata utilizzando colonne di liquido in tubi, verticalmente o con inclinazione, denominate manometri. L'altezza della colonna di liquidi ...

Education

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JoVE Core

Civil Engineering

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Unit 1

Unità 1

Fluid Statics

Statica dei fluidi

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manometers and gauges for fluid pressure

Fluid pressure is measured with manometers and related gauges. These tools use a liquid column to show pressure differences. The height of the column gives a simple reading of the force the fluid exerts.

A basic manometer is the piezometer. It is a vertical tube that is open at the top and filled with the same fluid being measured. When the tube connects to a container, the fluid height in the tube matches the pressure inside that container.

For more detailed measurements, the U-tube manometer is used. It has a U-shaped tube filled with a gauge fluid that does not mix with the fluid being measured. This setup is useful for measuring the pressure difference between two points.

The inclined-tube manometer is another form of manometer. One leg of the tube is tilted. This incline makes the scale stretch out, so it is easier to read very small pressure differences.

Other pressure tools are also used in practice. The Bourdon gauge measures gas or liquid pressure in many industrial settings. The aneroid barometer measures atmospheric pressure and is used in weather forecasting and altitude measurements.

Manometers and Gauges for Fluid Pressure

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measurement of fluid pressure

Fluid pressure is measured with manometers and related gauges. These tools use a liquid column to show pressure differences. The height of the column gives a simple reading of the force the fluid exerts. A basic manometer is the piezometer. It is a vertical tube that is open at the top and filled with the same fluid being measured. When the tube connects to a container, the fluid height in the tube matches the pressure inside that container. For more detailed measurements, the U-tube...

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key terms and concepts

Learn how piezometers, U-tube and inclined manometers, Bourdon gauges, and aneroid barometers measure fluid and atmospheric pressure in practical settings.

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JoVE Core Civil Engineering provides a foundational exploration of essential construction materials in civil engineering, focusing on bricks, stones, steel, wood, and concrete through easy-to-understand animated videos. This collection covers the properties, manufacturing processes, and practical applications of these materials. Additionally, the accompanied science-in-action videos demonstrate the research experiments performed in laboratories.

civil engineering

Manometers and Gauges for Fluid Pressure

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