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Advantages of optical fiber sensing system
Modern society belongs to rapid development. Fiber optic sensors are indispensable to human beings, because we need the network, and we also need the network to quickly transmit information, have more information storage capacity, and so on.
(1) High sensitivity
Since light is an electromagnetic wave with a very short wavelength, its optical length passes through the phase of light. Taking an optical fiber interferometer as an example, due to the small diameter of the optical fiber used, its optical length will change when subjected to small mechanical external forces or temperature changes, thereby causing a large phase change.
(2) Anti-electromagnetic interference, electrical insulation, corrosion resistance
Because the optical fiber sensor uses light waves to transmit information, and the optical fiber is an electrically insulating, corrosion-resistant transmission medium, and it is reliable, which makes it easy to use in various large-scale electromechanical, petrochemical, mine and other strong electromagnetic interference and flammable Explosive and other harsh environments.
(3) Fast measurement speed
Light travels fast and can transmit two-dimensional information, so it can be used for high-speed measurement. The analysis of radar and other signals requires a very high detection rate, which is difficult to achieve with electronic methods. High-speed spectrum analysis using the phenomenon of light diffraction can be solved.
(4) Large information capacity
The signal under test uses light waves as the carrier, and the frequency of light is extremely high, and the frequency band accommodated is very wide. The same fiber can transmit multiple signals.
(5) Suitable for harsh environment
Optical fiber is a dielectric, resistant to high pressure, corrosion and electromagnetic interference, and can be used in harsh environments that other sensors are not suitable for. In addition, the optical fiber sensor has the characteristics of light weight, small size, flexible, wide measurement object, good reusability and low cost.
(1) High sensitivity
Since light is an electromagnetic wave with a very short wavelength, its optical length passes through the phase of light. Taking an optical fiber interferometer as an example, due to the small diameter of the optical fiber used, its optical length will change when subjected to small mechanical external forces or temperature changes, thereby causing a large phase change.
(2) Anti-electromagnetic interference, electrical insulation, corrosion resistance
Because the optical fiber sensor uses light waves to transmit information, and the optical fiber is an electrically insulating, corrosion-resistant transmission medium, and it is reliable, which makes it easy to use in various large-scale electromechanical, petrochemical, mine and other strong electromagnetic interference and flammable Explosive and other harsh environments.
(3) Fast measurement speed
Light travels fast and can transmit two-dimensional information, so it can be used for high-speed measurement. The analysis of radar and other signals requires a very high detection rate, which is difficult to achieve with electronic methods. High-speed spectrum analysis using the phenomenon of light diffraction can be solved.
(4) Large information capacity
The signal under test uses light waves as the carrier, and the frequency of light is extremely high, and the frequency band accommodated is very wide. The same fiber can transmit multiple signals.
(5) Suitable for harsh environment
Optical fiber is a dielectric, resistant to high pressure, corrosion and electromagnetic interference, and can be used in harsh environments that other sensors are not suitable for. In addition, the optical fiber sensor has the characteristics of light weight, small size, flexible, wide measurement object, good reusability and low cost.
