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Application Prospects of Fiber Optic Sensors
2020-11-17
Fiber optic sensors have become a rapidly rising "tech darling" in recent years, due to their advantages such as extremely high sensitivity and accuracy, resistance to electromagnetic interference, high insulation strength, corrosion resistance, and compatibility with digital communication systems. They have been widely used in power grid systems, road monitoring, rail transit, and food safety, among other fields.
Fiber Optic Sensors: The Tech Darling
Fiber optic sensing technology is a new type of sensing technology. Through the effects of light reflection, refraction, and absorption, as well as the optical Doppler effect, acousto-optics, electro-optics, magneto-optics, and elastooptics, parameters such as the amplitude, phase, polarization state, and wavelength of light waves can be directly or indirectly changed. Therefore, optical fibers can be used as sensitive elements to detect various physical quantities.
China has become a major consumer of fiber optic sensors globally, and has made some breakthroughs in domestic production. It is understood that universities and research institutions such as Nanjing University and Shenzhen Zhongke Sensing have basically mastered the complete set of fiber optic sensor solutions. In terms of core components of fiber optic sensing systems, domestic companies such as Xiamen Beige's narrowband light source and Shiweitong's lithium niobate waveguide are striving for independent research and development.
Looking at the entire industry market, China's independent research and development of fiber optic sensors is still a "shortcoming," and the overall market level still lags behind foreign countries. Statistics show that China's new sensor development rate lags behind that of the US and Japan by nearly 10 years, and its industrialization level lags by 10-15 years. In the future, the industrialization pattern of China's fiber optic sensor market needs to be improved. The support of Internet of Things (IoT) technology will push the Chinese fiber optic sensor market towards a new peak of development.
Analysis of Fiber Optic Sensor Application Scenarios
The Internet of Things (IoT) has become an important driving force for the domestic production of fiber optic sensors. The development of the IoT must rely on a large number of sensors to obtain various environmental parameters, providing the IoT with more reliable data information. After system processing, the desired results are obtained. It is clear that fiber optic technology has broad application prospects in the IoT.
By keenly capturing the increasingly close industry trends of fiber optic sensor technology in the above-mentioned fields, the 8th China (Beijing) International Fiber Optic Sensing Technology and Application Conference and Exhibition aims to comprehensively expand the terminal application fields of fiber optic sensor technology, focusing on smart grids, mine safety, rail transit, ocean and environment, geology and water conservancy, and showcasing innovative comprehensive solutions from leading domestic enterprises.
Fiber optic sensors play a significant role in the smart grid field. Using fiber optic sensing technology to monitor power transmission lines, real-time monitoring of disturbances such as touching optical cables, junction boxes, and optical cores on power transmission lines, collecting and analyzing information, and determining the location, type, and intensity of disturbances can help line maintenance personnel promptly discover damage to power transmission lines, effectively addressing early warning monitoring of line damage, and providing the power system with alerts, intelligent analysis, and auxiliary decision support.
Fiber optic sensors are also making inroads into road safety. With the development of industry and transportation, the increasing span and complexity of bridges have led to greater concern about safety hazards. Embedding fiber optic sensing systems into cement structures creates the ability to sense stress and fracture damage. Simultaneously, using tension sensors to detect deformation in sections of tunnels prone to collapse, this information can be combined with the internet to achieve long-term, stable, real-time monitoring of these infrastructures, reducing the occurrence of accidents.
The role of fiber optic sensors in rail transit is also noteworthy. Taking the Harmonious 380AL high-speed train, a representative work of China's independently developed high-speed trains, as an example, a single train contains more than 1,000 sensors, averaging one sensor for every 40 components. They undertake functions such as status monitoring, fault alarms, and on-board equipment control. Academician Ding Rongjun of the Chinese Academy of Engineering and general manager of CRRC Zhuzhou Institute once pointed out the significant role of fiber optic sensors, which are indispensable for collecting train operating status information, high-speed comprehensive train testing, rail flaw detection, remote monitoring of track status, and indoor and outdoor environmental comprehensive sensing.
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