Optical fiber sensor assists in the development of the Internet of Things

In recent years, with the rapid development of sensing technology in China, the application of fiber-optic sensing technology in the Internet of Things has become the focus of people's research. Because the sensor has a wide application prospects in the Internet of Things, the relevant research institutions are bold. It is predicted that with the support of fiber-optic sensors, the Internet of Things will have a market capacity of trillions of yuan.

Since the appearance of optical fiber sensors, its advantages and applications have attracted the attention of people in various countries. And in-depth research on optical fiber sensing technology. Today, physical quantities such as displacement, temperature, speed, and angle can be measured with fiber optic sensors. Nowadays, many western developed countries will focus on optical fiber sensor systems, nuclear radiation monitoring, civilian plans, and other aspects of optical fiber sensor research, and have achieved gratifying results.

China's research on fiber optic sensors started late, and many research institutes and companies have conducted in-depth studies on fiber optic sensors to promote the development of fiber optic sensing technology. In 2010, Zhang Xuping’s “Brillouin Effect Continuous Distributed Optical Fiber Sensing Technology” passed the expert's appraisal. The expert group believes that this technology is highly innovative and the technology has reached the advanced level in the world. Therefore, it has broad prospects for development. The development of this technology is mainly the application of the Internet of Things technology, which has accelerated the development of the Internet of Things in China.

Sensors are an extremely important part of the Internet of Things. Therefore, the performance of the sensor determines the performance of the Internet of Things. It can be said that the main means for the Internet of Things to obtain information is the sensor. In this way, the reliability and accuracy of the information collected by the sensors will have an impact on the processing and transmission of information by the control node. From this perspective, the reliability and anti-jamming performance of the sensor will play a decisive role in the application performance of the Internet of Things.

Application of Optical Fiber Sensing Technology in Internet of Things

The development of the Internet of Things must rely on a large number of sensors to obtain a variety of environmental parameters, so as to provide more reliable data information for the Internet of Things, and then through the system to get the results people need.

At present, there are four kinds of optical fiber sensors that are most widely used: fiber optic gyros, fiber optic hydrophones, fiber grating sensors, and fiber optic current sensors. Among them, there are three types of fiber optic gyroscopes: interference type, resonant type, and Brillouin type. Interferometric fiber optic gyroscope is a first-generation commercial stage with mature technology. Resonating fiber optic gyroscope is the second generation in the laboratory research stage. The Liyuan Fiber Optic Gyro is a third-generation fiber optic gyro sensor in the theoretical research stage. The fiber optic hydrophone is an underwater acoustic signal sensor based on optical fiber and optoelectronic technology. This type of sensor uses highly sensitive fiber optic coherent detection. The sound signal in the water is converted into an optical signal, which is then transmitted to the signal processing system through an optical fiber and converted into a sound signal. This sensor can be classified into interference type, intensity type, and grating type according to principles; it is included in the products of fiber grating sensors. Strain sensors, temperature sensors and pressure sensors, among which fiber Bragg grating sensors are the focus of research in recent years, most of them belong to light intensity type and interference type, and have advantages and disadvantages. Since the development of electric power this year, there has been rapid progress. Under such circumstances, in the face of strong current measurement problems, fiber-optic current sensors can well avoid accidents caused by excessive power.

1. Application of IoT in construction projects Nowadays, in the process of construction of highways and bridges, safety accidents such as tunnel collapses, fires, and cracks in bridges often occur. This poses a serious threat to people's lives and property safety. It also has a certain impact on China’s economic development. However, if the fiber-optic sensor is placed in a building, it is possible to know in time whether the bridge is deformed or the load carried by the bridge, etc. It is also possible to detect whether the deformation of the tunnel is likely to occur by means of a tension sensor. We will use this information and When the Internet is connected, an optical fiber internet of things is formed, and then these infrastructure projects can be monitored over the long term, reducing or preventing the occurrence of security incidents.

2. Application of agricultural internet of things China is a big country in agriculture, and most people live in rural areas. Therefore, the development of agriculture is extremely important for the development of our country's economy. It can be said that in recent years, the development of the Internet of Things has made great progress in China's agricultural development. In general, the sensor technology is applied to many aspects such as crop growth, harvesting, and storage. In this way, an Internet of Things is formed so that agricultural production and management can achieve high production and low consumption.

In the growing process of crops, the temperature, humidity and soil composition of the crops are monitored by means of optical fiber temperature sensors, humidity sensors, etc., so that the monitoring information is fed back to the system in time, and these are then controlled by the control devices in the system. The parameter to a suitable value, so that the crop grows in a suitable environment, to achieve high yields. In addition, optical fiber sensors can also be used to sense the information of the food reserve environment and guide workers to properly turn over food.

3. Application of Perimeter Intrusion Prevention System In recent years, a new field of development of optical fiber sensing technology is the perimeter intrusion prevention system. However, there are many types of sensors used in the current defense system applications, so many solutions have emerged. However, from the technical point of view, it is the use of fiber perimeter intrusion sensors to obtain information on external intrusion factors and issue an alarm signal at the same time. Today, this technology has been widely applied to power stations, military and other fields.

4. Other applications In the actual application process, fiber-optic sensors have the advantage of anti-interference. Therefore, fiber-optic sensors are often used in places where electric sensors are not suitable, especially in national defense. Detection of fiber optic guidance, aerospace, etc.; however, in the power system, it is usually used in the rotor, voltage, transformer current, etc. of super-large motors; besides, fiber optic sensors can also be used in oil and gas production processes. The monitoring of underground temperature and oil pipelines. Combining these with the Internet, we can form a larger Internet of Things, so that we can effectively conduct safe production and management.