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Insulated from pollution, magnetism, sound, pressure, temperature, acceleration, gyro, displacement, liquid level, torque, photoacoustic, and current. Fiber optic sensors can be used for displacement, vibration, rotation, pressure, bending, strain, speed, acceleration, and current. , measurement of physical quantities such as magnetic field, voltage, humidity, temperature, sound field, flow, concentration, PH value and strain. Fiber optic sensors have a wide range of applications, involving almost all important fields in the national economy and national defense and people's daily lives. They can be used safely and effectively in harsh environments, solving technical problems that have existed in many industries for many years, and have great significance. market demand. Mainly manifested in the following aspects of application:
Application of interferometric gyroscopes and grating pressure sensors in bridges, dams, oil fields, etc. in urban construction. Optical fiber sensors can be embedded in concrete, carbon fiber reinforced plastics and various composite materials to test stress relaxation, construction stress and dynamic load stress to evaluate the structural performance of the bridge during the short-term construction stage and long-term operating status.
In the power system, parameters such as temperature and current need to be measured, such as temperature detection in the stator and rotor of high-voltage transformers and large motors. Since electrical sensors are susceptible to interference from electromagnetic fields, they cannot be used in such situations and can only be used Fiber Optic Sensor. Distributed optical fiber temperature sensor is a high-tech technology developed in recent years for real-time measurement of spatial temperature field distribution. The distributed optical fiber temperature sensing system not only has the advantages of universal optical fiber sensors, but also has the ability to measure the temperature of various points along the optical fiber. Distributed sensing capabilities. Using this feature, we can continuously measure the temperature of various points within several kilometers along the optical fiber in real time. The positioning accuracy can reach the order of meters, and the measurement accuracy can reach the level of 1 degree. It is very suitable for large-scale intersection temperature measurement. Application occasions.
In addition, fiber optic sensors can also be used in railway monitoring, rocket propulsion systems, and oil well detection.
Optical fiber also has the significant advantages of broadband, large capacity, long-distance transmission, and the ability to realize multi-parameter, distributed, and low-energy consumption sensing. Fiber optic sensing can continuously draw on new technologies and new devices in fiber optic communications. Various fiber optic sensors are expected to be widely used in the Internet of Things.
