Features and application range of fiber optic sensors

With the advent of the information age, sensors have been vigorously developed
as the main way and means to obtain information in the field of nature and production.
At present, optical fiber sensors are widely used
in urban construction, electric power, monitoring and other aspects because of their sensitivity, accuracy and intelligence.

Fiber optic sensors have the following characteristics:

1.
High sensitivity;

2.
Devices that can be manufactured to sense various physical information (sound, magnetism, temperature, rotation, etc.
);

3.
The geometric shape has multi-faceted adaptability, and can be made into an optical fiber sensor of any shape;

4.
It has intrinsic compatibility with optical fiber telemetry technology;

6.
It can be used for high voltage, electrical noise, high temperature, corrosion, or other harsh environments
.

Optical fiber sensors are currently
widely used in urban construction and power systems.
Application of interference gyroscopes and grating pressure sensors for bridges, dams, oil fields, etc.
in urban construction
.
Fiber optic 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 bridges in the short-term construction phase and long-term operation.
In the power system, it is necessary to measure temperature, current and other parameters, such as the detection of the stator of high-voltage transformers and large motors, the temperature in the rotor, etc.
, because the electric sensor is susceptible to electromagnetic field interference, can not be used in such occasions, can only use optical fiber sensors
.
For example, distributed optical fiber temperature sensor is a high-tech
developed in recent years for real-time measurement of spatial temperature field distribution.
It can also be used for railway monitoring, rocket propulsion systems, and well inspection
.

Optical fiber has the significant advantages
of broadband, large capacity, long-distance transmission and multi-parameter, distributed, and low-energy sensing.
Optical fiber sensing can continuously absorb new technologies and new devices of optical fiber communication, and various optical fiber sensors are expected to be widely used
in the Internet of Things.