Since the emergence of fiber optic sensors, its advantages and applications have attracted great attention from people in various countries. And the optical fiber sensing technology has been deeply studied. Nowadays, physical quantities such as displacement, temperature, speed, and angle can be measured through optical fiber sensors. Nowadays, many western developed countries will focus on optical fiber sensor research on optical fiber control systems, nuclear radiation monitoring, civil programs and other aspects, and have achieved gratifying results.

The research on optical fiber sensors in my country started relatively late. Many research institutes and enterprises have conducted in-depth research on optical fiber sensors, which has promoted the development of optical fiber sensing technology. In 2010, Zhang Xuping's "Brillouin Effect Continuous Distributed Optical Fiber Sensing Technology" passed the appraisal of experts. The expert group believes that this technology is highly innovative, and the technology has reached the world's advanced level. Therefore, it has broad development prospects. The development of this technology is mainly based on the application of the Internet of Things technology, thereby accelerating the development of the Internet of Things in my country.

Sensors have become 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 of obtaining information in the Internet of Things are sensors. In this way, the reliability and accuracy of the information collected by the sensor will have a certain impact on the control node's processing and transmission of information. From this point of view, the reliability and anti-interference of sensors will play a pivotal role in the performance of IoT applications.

Application of Optical Fiber Sensing Technology in the Internet of Things

Through the above analysis, it is known that the development of the Internet of Things must use a large number of sensors to obtain various environmental parameters, so as to provide more reliable data information for the Internet of Things, and then systematically process it to obtain the results that people need. The following is a detailed discussion of the application of optical fiber sensing technology in the Internet of Things.

At present, there are four kinds of fiber optic sensors with the widest application, namely fiber optic gyroscope, fiber optic hydrophone, fiber grating sensor and fiber optic current sensor. Among them, there are three types of fiber optic gyroscopes: interference type, resonance type and Brillouin type. Interference fiber optic gyroscope is the first generation of commercialization stage with mature technology, and resonant fiber optic gyroscope is the second generation in the laboratory research stage. The Liyuan fiber optic gyroscope is the third generation fiber optic gyroscope sensor in the theoretical research stage; the fiber optic hydrophone is an underwater sound signal sensor based on optical fiber and optoelectronic technology. Convert the sound signal in the water into a light signal, and then transmit it to the signal processing system through an optical fiber to convert it into a sound signal. According to the principle, this sensor can be divided into interference type, intensity type, grating type and other types; the products of fiber grating sensors include Strain sensors, temperature sensors and pressure sensors, among which fiber bragg grating sensors are the research hotspots in recent years, most of them are light intensity type and interference type, and each has its own advantages and disadvantages. The development of electric power has been advancing by leaps and bounds since this year. In this case, in the face of the measurement problem of strong current, the fiber optic current sensor can well avoid some accidents caused by excessive power.