The hottest continuous distributed optical fiber s

2022-07-25
  • Detail

The continuous distributed optical fiber sensing technology fills the gap of the IOT in China editor's note: the continuous distributed optical fiber sensing technology has a wide range of applications, such as the whole building, dam, bridge, tunnel, oil pipeline, submarine optical cable, etc., which can be connected by laying optical fiber and interconnection, so as to transmit the monitoring information to any set terminal for remote monitoring and control, So that the safety and quality status of various buildings, especially large-scale projects, can be continuously monitored, and early warning information can be provided

recently, the continuous distributed optical fiber sensing technology based on Brillouin effect invented by zhangxuping, Professor of the school of engineering management of Nanjing University, has passed the expert appraisal organized by the Ministry of education. The expert group agreed that this technology is highly innovative, has a number of independent intellectual property rights, has reached the domestic leading and international advanced level in technology, and has a good application prospect

in recent years, people are worried about the problem projects such as the crooked buildings, the fragile buildings and the fuzzy bridges. It is becoming more and more important to find out the problem projects as soon as possible, eliminate the potential safety hazards, and ensure the safety of the country and people's lives and property

zhangxuping introduced that the continuous distributed optical fiber sensing technology has a wide range of applications, such as the overall building of the building, dams, bridges, tunnels, oil pipelines, submarine optical cables, etc. both internal and external lubricants 0.5~2.0 can be connected through laying optical fibers and interconnection, so as to transmit the monitoring information to any set terminal for remote monitoring and control, So that the safety and quality status of various buildings, especially large-scale projects, can be continuously monitored, and early warning information can be provided

zhangxuping said that the essence of this technology is the use of the concept of IOT. The so-called IOT is a network concept that connects any object with the Internet through information sensing equipment according to the agreed protocol for information exchange and communication, so as to realize intelligent identification, positioning, tracking, monitoring and management. Sensors are the core of IOT. From a technical point of view, IOT is sensing

in the past two years, this technology has been promoted very rapidly in foreign countries and has been applied more and more widely. There are also applications in China, such as Sutong Bridge, EMU protective fence and Nanjing Xuanwu Lake Tunnel, which are all embedded with optical fibers. However, the core technologies adopted are all foreign

according to zhangxuping, at present, the optical fiber sensing technology in China is mainly point type. The so-called point type means that point type sensors are implanted into the project and monitored through the reaction of points. For large-scale projects, in addition to the defects of high cost, the point type optical fiber sensing technology has scattered sensing distribution. If the problem location is not at the point where the sensor is arranged, it is insensitive or even insensitive, which is very easy to cause omissions. Her invention of distributed optical fiber sensing technology makes up for this defect. The technical invention has six advantages: light slimming and small mass are used for easy embedding; Corrosion resistance; Anti electromagnetic interference; Wide transmission band, easy integration of sensing and transmission; The monitoring response is continuous, rapid and sensitive; Low maintenance cost, economical

it is reported that the distributed optical fiber sensing technology has appeared in the front tool wear mechanism in foreign countries for several years. However, due to the high cost, difficult technology, and involving foreign patents and other thorny issues, the technology is prohibitive in China. Zhangxuping said that the technology she invented not only fills the domestic gap that is a key problem to be solved urgently in the field of agriculture and environment in China and even the world, but also the cost of similar equipment is only 1/5 of that of foreign equipment

Zhang Xuping vividly compares construction projects to people who need to have a comprehensive physical examination every year. If the problems are serious and have reached an advanced stage, it is difficult to treat them. However, if there is a highly sensitive health monitoring, it means that if we do not clear them and install the instruments on us in the next 10 years, and if there is any abnormality in various indicators, we will give an alarm in time for diagnosis and treatment, then many chronic diseases and incurable diseases can be avoided

according to zhangxuping, this technology developed by China was first applied to fault location of submarine optical cables in 2004, which greatly shortened the diagnosis time of submarine cable faults, improved the positioning accuracy of submarine cable fault points, and minimized the losses caused. Due to the complexity of the submarine working environment and the huge submarine optical cable equipment, the continuous distributed optical fiber sensing technology fully shows its irreplaceable role

Copyright © 2011 JIN SHI