In recent years, optical fiber sensing technology has developed rapidly. Different from traditional technology, it has the characteristics of anti-interference, corrosion resistance, high sensitivity, strong reliability, small size, etc. It is especially suitable for large-scale and large-capacity remote distributed measurement, which is the trend of industrialization in the future.
At present, the products developed based on optical fiber sensing technology already include intelligent optical fiber intrusion alarm system, communication optical cable safety monitoring system, oil and gas pipeline safety monitoring system, and optical fiber voice acquisition system, etc., which are mainly used for perimeter security in important places and security along oil main lines .
With the rapid economic development and the increasingly complicated security situation, some major engineering projects and key protected areas, such as airports, railway stations, military areas, etc., have put high demands on security. Optical fiber sensing perimeter security technology has also become a new research hotspot in the industry.
The traditional perimeter security system mainly includes infrared radiation, vibration cable alarm system, video monitoring system (using coaxial cable, optical cable) and so on. The traditional security technology has the disadvantages of poor performance, high false alarm rate, vulnerability to lightning strikes, and the use of copper cables. The industry widely believes that the optical fiber perimeter defense system can effectively overcome the shortcomings of the current perimeter security system, and also has a long monitoring distance. The advantages of no electromagnetic radiation, strong anti-interference ability, high reliability, and relatively simple engineering construction are the most advanced technology at present and the mainstream direction of the current security market development. Therefore, many people believe that the perimeter management system based on optical fiber vibration sensing technology will replace the traditional technology and become the mainstream technology in the future. It is reported that many domestic enterprises have launched their own optical fiber sensor security system.
Dr. Wang Honghai, the technical director of Wuhan Changyingtong Optoelectronics Technology Co., Ltd., told the author that there are still many problems in fiber optic security technology that have not been solved. The detection of optical characteristics (attenuation, phase, wavelength, polarization, mode field distribution and propagation time) is not mature At the same time, the false alarm rate is high and the cost is high. It cannot completely replace the traditional infrared and video surveillance and other security technologies. He said that the currently running fiber optic sensor security system is a combination of fiber optic sensor and video surveillance, infrared radiation. And this hybrid networking security technology will exist for a long time.
It is understood that in the field of optical fiber sensing, although it is a relatively new market relative to optical communications, many companies have already launched fierce competition. This includes companies with sensing directions and optical communication directions. Dr. Wang said that the development of the optical fiber sensing industry and the optical communication industry complement each other, and can also promote the development of the optical communication industry and its penetration into more technical fields. For example, in the digital substation, with the use of all-fiber current transformers, optical communication manufacturers will also play an important role in the field of smart grids. Some manufacturers have begun to enter this field by providing special optical fiber cables and devices and system solutions. Some optical communication manufacturers are also entering the field of optical fiber sensing to test, and many are believed to be considering entering. After all, as a FTTH fiber-to-the-home system, you already have similar experience in fiber security. This is a new direction for the more fiercely competitive and thinly profitable optical communications industry.
Langrui Energy (Shenzhen) Co.,Ltd , https://www.langruienergy.com