Sensitive elements of devices and sensors

Июль 31, 2022

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Sensitive elements of devices and sensors

Содержание

2. Division of sensitive elements
3. The main characteristics of sensitive elements: Reliability Microminiaturization Unification Standardization
4. Elastic sensitive elements Springs Membranes Bellows Manometric tubes Thermobimetallic elements Impellers
5. Springs
6. Bellow
7. Manometric tubular plate
8. Bimetallic thermometer element Bimetallic contact
9. Impeller
10. Electrical sensitive elements. Parametric Generator. To ensure the operation of parametric elements, a power supply is
11. Magnetic and magnetoelectric sensitive elements Scheme of an annular permanent magnet with an air gap
12. Magnetoelectric sensitive elements are widely used to convert current I or voltage U into a force
13. Comparison with permanent magnets Advantages of sensitive magnetoelectric elements: High sensitivity Accuracy of measurements Linearity of
14. Comparison with permanent magnets Disadvantages of sensitive magnetoelectric elements: Complexity of construction Unsuitable for direct measurement
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Division of sensitive elements

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The main characteristics of sensitive elements:
Reliability
Microminiaturization
Unification
Standardization

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Elastic sensitive elements
Springs
Membranes
Bellows
Manometric tubes
Thermobimetallic elements
Impellers

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Springs

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Bellow

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Manometric tubular plate

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Bimetallic thermometer element
Bimetallic contact

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Impeller

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Electrical sensitive elements.
Parametric
Generator.
To ensure the operation of parametric elements, a

power supply is required.
The generator sensitive element converts the input physical quantity into an EMF. Generator elements do not require a power supply in most cases.

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Magnetic and magnetoelectric sensitive elements
Scheme of an annular permanent magnet with

an air gap

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Magnetoelectric sensitive elements are widely used to convert current I or

voltage U into a force of Q or moment M. The most common in the nomenclature of devices are magnetoelectric galvanometers and logometers. The galvanometer (Fig. 12) consists of a fixed magnet NS and a movable frame having a width b.

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Comparison with permanent magnets
Advantages of sensitive magnetoelectric elements:
High sensitivity
Accuracy of measurements
Linearity

of characteristics

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Comparison with permanent magnets
Disadvantages of sensitive magnetoelectric elements:
Complexity of construction
Unsuitable for

direct measurement of alternating current.