Fiber optic sensor networks have three basic components, one of which is called a single point sensor. One fiber only serves as a transmission here, and the other is a multi-point sensor, where a fiber bundles many sensors so that many sensors can share the light source for network monitoring. Then there is the smart fiber sensor. The multi-point fiber optic sensor is a grating from the outside, and periodic intervals are found by ultraviolet radiation. When a fiber is incident, if the wavelength of the fiber is exactly equal to twice the interval, then the wave will be strongly reflected, and if the fiber is subjected to temperature changes or strain, etc., the reflected wavelength will change. There are many that can be done on a single fiber, and it can be used to connect to a wide variety of sensing applications.

The single point sensor is one of the three basic components of the fiber optic sensor network.

One fiber only serves as a transmission, and the other is a multi-point sensor. A fiber optic cable connects many sensors, and many sensors can share the light source for network monitoring. Then there is the smart fiber sensor.

The multi-point fiber optic sensor is a grating from the outside, and periodic intervals are found by ultraviolet radiation. When a fiber is incident, if the wavelength of the fiber is exactly equal to twice the interval, then the wave will be strongly reflected, and if the fiber is subjected to temperature changes or strain, the wavelength of the reflection will change. There are many ways to make a fiber on the root, and it can be connected to a variety of sensing applications.

Because the fiber is soft, it can be two-dimensional, three-dimensional, so the horizontal axis is the position of the space, and the vertical axis is the measurement object. What kind of problem is solved by such a sensor network? It solves what is happening at what position, how many strength problems there are, that is, providing two-dimensional information. This is the problem that intelligent fiber optic sensors need to solve. It has very outstanding features, including small size, high strength, good stability, and implantable materials. Anti-electromagnetic interference and environmental resistance.

Fiber optic sensors have been successfully applied to aircraft structure monitoring. A-380 and Boeing 787, characterized in that more than half of the quantity is carbon fiber. For example, carbon fiber meets several defects in resin, and one is peeling between layers. Because this material is strong, it is difficult to be like aluminum alloy. Perform carbonation testing.

So the researchers studied burying the fiber-optic sensor in the composite. Since the material has a thickness of about 125 microns, the fiber-optic sensor must be a very small fiber-optic sensor, about 50 microns in diameter.

Fiber optic sensor networks can be used in diagnostic techniques for fiber optic communication networks. Fiber optic sensor networks have many applications in security, and many companies in China have carried out fruitful work in this regard.