Fiber optic sensor is a new high technology in recent years, because it has extremely high sensitivity and precision, anti-electromagnetic interference, high insulation strength, corrosion resistance, compatible with digital communication system and other advantages, has been widely used in power grid system, road monitoring, rail transit, food safety and other fields.

       High-tech fiber optic sensor

       Optical fiber sensing technology is a new kind of sensing technology. Through the reflection, refraction and absorption of light, optical doppler effect, acoustic and optical, electro-optical, magneto-optical and elastic optical effect, the amplitude, phase, polarization and wavelength of light waves can be directly or indirectly changed, so that the optical fiber can be used as a sensitive element to detect a variety of physical quantities.

        China has become the world's largest consumer of optical fiber sensors, in the process of localization has a certain breakthrough. It is understood that the universities and research institutes represented by nanjing university and shenzhen zhongke sensor have basically mastered the whole optical fiber sensor program. As for the core components of the optical fiber sensor system, xiamen peig's narrow-band light source and shiweitong's lithium niobate waveguide, etc. are all vying for independent research and development.

       Throughout the whole industry market, China's independent research and development of optical fiber sensors is still a "short board", the overall market level is still behind foreign countries. According to statistics, the rate of new sensor development in China is nearly 10 years behind the United States and Japan and other countries, and the industrialization level is 10-15 years behind. In the future, the industrialization pattern of China's optical fiber sensor market needs to be improved. The blessing of Internet of things technology will push China's optical fiber sensor market towards a new round of development peak.

       Application scenario analysis of fiber optic sensor

       The Internet of things has become an important driver of the localization of optical fiber sensors. The development of the Internet of things must rely on 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 through systematic processing, get the results people need. Therefore, optical fiber technology has a broad application prospect in the Internet of things.

        Is keen to capture optical fiber sensor technology in the field of the increasingly close the wind field, the eighth China (Beijing) international optical fiber sensing technology and application of the convention and exhibition is dedicated to developing fiber optic sensor technology application field terminal, focus on smart grids, mine safety, rail transportation, Marine and environment industry, geology and water conservancy, and other applications, present domestic giant enterprises corresponding innovative integrated solutions.

       Fiber optic sensors play an important role in the field of smart grid. Using the optical fiber sensing technology to safety monitoring of transmission line, by touch to occur on the transmission line, cable, connector box, optical core disturbance such as real-time monitoring, information collection and analysis, determine the location of the disturbances, types, intensity, in order to help the line maintenance personnel found that the destruction of the transmission lines in time, effectively solve the monitoring, early warning system for line damaged for the power system to provide the alarm, intelligent analysis and auxiliary decision support.

       Fiber optic sensors are also contributing to road safety. With the development of industry and transportation, the span of the bridge increases and the complex trend of the structure, the safety hidden danger is paid more attention to. The fiber optic sensor system is embedded into the cement structure to form the ability to sense stress and fracture damage. At the same time, the tension sensor is used to feel the local deformation of the tunnel that is prone to collapse. This information can be combined with the Internet to realize long-term and stable real-time monitoring of these infrastructures and reduce the occurrence of accidents.

       Fiber optic sensors in the field of rail transit can not be underestimated. Take harmony 380AL, a representative of high-speed railway trains independently developed by China, for example. There are more than 1,000 sensors in a train, with one sensor in every 40 parts. They are responsible for status monitoring, fault alarm, vehicle equipment control and other functions. Ding rongjun, academician of the Chinese Academy of Engineering and general manager of CRRC zhuzhou institute, once pointed out the important role of fiber optic sensors, which have played an indispensable role in collecting the running status information of trains, comprehensive high-speed detection of trains, rail flaw detection, remote monitoring of track status, and comprehensive sensing of indoor and outdoor environment.