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Introduction to the Characteristics of Fiber Grating Sensors

As a new type of fiber optic sensor, fiber grating sensor has the characteristics of strong reliability, high precision, strong waterproofness, high sensitivity, little influence by external environmental factors, easy to build sensor network, etc., and the application field of fiber grating sensor is wider. It has greater potential and is widely used in petrochemical, electronic information, geological exploration and other fields, and some scholars have applied optical fiber sensor technology to seismic monitoring and achieved ideal results.


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As a new type of sensor, fiber grating sensor is mainly characterized by strong reliability, high precision, little influence by external environment, easy to build sensor network, etc. It is widely used in petrochemical, electronic information, geological exploration and other fields. At present, some researchers have applied the optical fiber sensor technology to the earthquake real-time monitoring system, and achieved ideal results. In recent years, the application of fiber grating sensors has become more and more extensive, and the existing traditional electrical sensors have been gradually updated and replaced in the current market. Compared with traditional electrical sensors, the main advantages of fiber grating sensors are as follows.


1. The fiber grating sensor has high precision and strong reliability


The optical fiber itself is slender and has the characteristics of durability, safety and reliability, and very stable performance. The corresponding fiber grating sensor has the characteristics of non-conductivity, light weight, high reliability, high precision, little influence by the external environment, easy to build a sensor network, etc. Buried and basically no damage to the buried object. Based on these characteristics, fiber grating sensors are more suitable for harsh and high-speed applications such as coal surveying, power facility monitoring, oil depot monitoring, underground safety operations, gas and oil tank monitoring, tunnel and bridge impact, vibration damping, shape control detection, etc. Real-time monitoring work in a risky environment.


2. The fiber grating sensor has low failure rate, strong maintainability, high cost performance, good reliability and high sensitivity


Fiber Bragg grating sensors can be deployed in multiple locations inside the building, and can perform independent monitoring of multiple parameters, providing real-time monitoring information to the outside world.


3. The sensing probe of the fiber grating sensor is simple in appearance, light in weight, soft in material and easy to install


Fiber Bragg grating sensors can be installed in various complex environments and places, buried in tunnels, bridges and other buildings, and can continuously monitor the impact and shape control of tunnels, bridges and other buildings in real time, and provide real-time early warning and prompt when problems are found. Human intervention is carried out in time to eliminate potential safety hazards and ensure the integrity and safety of the building structure. The sensing probe of the fiber grating sensor has stable performance and strong repeatability. Since the monitoring information of the sensing probe of the fiber grating sensor is encoded by wavelength, it is not disturbed by factors such as the coupling loss of the fiber optic connector and the light intensity fluctuation of the light source, and the sensing probe of the fiber grating sensor has a relatively strong anti-interference ability.

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