IDC Data Center-Application Technology Solution
1. Why do IDC data centers use optical fiber temperature sensors?
Data centers have high requirements for temperature, requiring constant temperature 365 days a year. However, in fact, in the data center computer room, the temperature of different locations is different. If the ventilation is not good, the temperature can also be different in the same data center by several degrees, so the temperature in the local location is relatively high, and it is in this location for a long time. The equipment will be affected, and even accelerate the aging of the equipment. Therefore, some temperature sensors are generally deployed in the data center to monitor the local temperature of the data center. The use methods include thermal resistance sensors, thermocouple sensors, and special semiconductors. Sensors, etc. However, this method has a small single-point measurement range, complicated wiring, easy damage, and heavy maintenance. Often only 1 to 2 temperature collection points are set in a channel, and the number of collection points is too small to detect each cabinet It is difficult to monitor the local hotspots or local super-cooling spots in the computer room. The actual effect is not very good in use, and it cannot fully reflect the real temperature of all local points inside the computer room. If the collected temperature data is inaccurate, and there are even many missing local points, it will not be able to provide meaningful data for energy saving optimization of the data center, provide a reference for the accurate air supply of air conditioners, and even fail to find local over-temperature points in time. There are serious security risks.
How to solve the problem of internal temperature monitoring in the data center?
Optical fiber temperature measurement technology provides the possibility. Optical fiber temperature measurement technology is a new technology that has only been developed in recent years, and has gradually revealed some excellent characteristics. The optical cable used is both a transmission medium and a sensing unit. The pulses emitted by the light source are transmitted along the optical cable after the wavelength division multiplexer. During the transmission, the pulses have the same effect as the fiber molecules to produce spontaneous Raman scattered light. Among them, Stokes light is not sensitive to temperature, while anti-Stokes light is Sensitive to temperature, the two scattered lights are separated by a wavelength division multiplexer and detected by a highly sensitive detector. Because the Raman scattering signals generated at different positions of the optical cable are transmitted to the detector at different times, the position of Raman scattering can be determined by the return time of the detection signal. Combining high-speed signal acquisition and data processing technology, it can be accurately and quickly obtained. Temperature information at any point on a fiber optic cable. This technology has been widely used in electric power, petrochemical, tunnel, construction and other fields. Due to the large difference in the spatial resolution, temperature accuracy, measurement range and measurement time of optical fiber temperature measurement, it is rarely used in data centers with higher accuracy requirements. application. With the improvement of optical fiber temperature measurement technology in recent years, it is possible for optical fiber temperature measurement to enter the data center. In the data center, a single optical fiber is used to realize temperature monitoring and signal transmission, and the optical fiber Raman scattering effect and optical time domain reflection measurement technology are comprehensively used to measure the spatial temperature distribution along the optical fiber in real time, which can realize real-time accurate measurement of any designated measurement point. Temperature information collection.
Advantages of optical fiber temperature measurement
Compared with traditional temperature monitoring systems in data centers, optical fiber temperature measurement has many advantages. First of all, in the data center, optical fiber has been laid throughout the entire data center. As long as there is equipment and business traffic, there is optical fiber, which covers 100% of the monitoring area and has no measurement blind spots. Secondly, because the optical fiber sensor uses wavelength coding for temperature information, the entire temperature measurement system is no longer affected by factors such as light source power fluctuations and fiber bending, and has high reliability. In addition, the optical fiber sensor has a simple structure, a small size, and does not take up space. Traditional temperature monitors are generally hung on the ceiling, and there is still a certain distance from the equipment area. The monitored temperature data is inaccurate and insensitive to local temperature. If placed near the machine frame, it will take up a lot of space. This method cannot be implemented at all, so traditional temperature monitors are installed on the ceiling. The third is that the optical fiber temperature measurement is resistant to electromagnetic interference, corrosion, and explosion-proof, and can work stably in harsh environments. There is a thick protective film on the surface of the optical fiber, unlike traditional temperature monitors that rely on probes to complete temperature monitoring. Optical fiber temperature measurement and insulation performance is also good, suitable for installation in high and low voltage power distribution equipment. Finally, the optical fiber temperature measurement is sensitive and real-time. Through the monitoring system, the temperature along the optical fiber can be displayed in real time, and the temperature distribution diagram can be drawn, which is intuitive and effective. You can see where the temperature is high at a glance through the temperature graph. When the temperature exceeds the threshold, provide timely alarm information and accurately locate the alarm location, and directly feed the alarm information back to the data center monitoring personnel. It is with these advantages that it is possible to deploy optical fiber temperature measurement technology in data centers.
2. IDC computer room data security monitoring system
Comprehensive, all-optical fiber, long distance, intrinsically explosion-proof;
Dynamic environment, computer room environment, slow change + sudden change
Guangdong Telecom has completed more than 10 implementations
Three, the significance of IDC computer room data detection
Through optical fiber temperature measurement, the real-time temperature distribution map of the entire data center can be well grasped, which gives us a green data center construction and improves reference data. The use of optical fiber temperature measurement technology can make the air conditioning system in the best energy-saving state and eliminate internal local hot spots; the use of optical fiber temperature measurement has strong reliability, stable operation, and simple construction and installation; the use of optical fiber temperature measurement improves the maintainability of the data center And management level, etc., these can save a lot of money for the data center and reduce the energy consumption of the data center. A small optical fiber temperature measurement can play a big role. Although optical fiber temperature measurement has so many benefits, it is rarely used in practice, especially in domestic data center computer rooms, and it is still in the preliminary stage of development. Optical fiber temperature measurement is a very mature technology application abroad. This is mainly because the domestic optical fiber temperature measurement technology is not accurate enough, and the price of foreign technology products is too high. The air conditioning feedback control interface is also more complicated during installation. Professional installation and later maintenance are required, and the technical requirements are relatively high. This makes the application of optical fiber temperature measurement technology basically invisible in domestic data centers. Of course, optical fiber is only deployed in places where there are equipment interconnections. In places far away from the cabinet, it is still not covered. Although the possibility of high heat generation is not high in these places, it is better to have a temperature just in case. monitor. Therefore, if possible, in a data center, it is best to use a combination of traditional temperature monitoring and optical fiber temperature measurement. Some temperature monitoring probes can be installed in places that are not touched by the optical fiber deployment to collect temperature information so that the data can be obtained. The temperature of all places inside the center in order to monitor the overall temperature.
With the improvement of the concept of building a green data center, optical fiber temperature measurement, as a new application mode of temperature monitoring, provides effective technical support for improving data center safety and energy saving, and provides a large amount of analysis data for the construction of green data center . In the data center, optical fiber temperature measurement technology is bound to gain more attention and development.
4. Application of Hoyatek DTS Distributed Optical Fiber Temperature Measurement System
This system adopts today's advanced photoelectric technology, communication technology, microprocessor technology, digital temperature sensing technology and original design of low temperature, strong electric field, and humid environment operation technology. It can separately monitor the temperature in different environments, discover potential accidents as early as possible, and minimize losses. At the same time, it can also provide a large amount of online monitoring data to provide a reliable basis for operators to fully understand the operation of power equipment.
Features of DTS distributed optical fiber temperature monitoring system
[Advancement] : Based on the internationally promoted distributed optical fiber temperature measurement technology, and on the basis of nearly 20 years of successful application experience abroad, this system has excellent technical performance and quality;
[Safety] : Using optical fiber as the medium of temperature sensing and signal transmission, the sensor does not need power supply to work, it is intrinsically safe, has excellent insulation performance and anti-electromagnetic interference, and the sensor installation meets safety regulations;
[Stability and accuracy] : The temperature data is obtained by detecting the movement of the wavelength of light waves. The sensor is only sensitive to temperature, which avoids the problem of traditional sensors that are easily affected by interference factors such as power fluctuations and transmission line loss. The system is stable and reliable; temperature measurement accuracy Reach ± 1℃, and the temperature resolution can reach 0.1℃;
[High reliability in long-term operation] : The system is safe and reliable in operation, stable in performance, suitable for long-term continuous work in harsh environments;
[Compatibility] : The monitoring host has its own standard communication interface, provides Ethernet port, RS232, USB, etc., combined with the variable power station integrated automation system, etc., to achieve data sharing, simple management, and seamless connection with related systems;
[Economy] : The cost of the system is reasonable and cost-effective. After it is completed and put into use, it can work unattended for a long time, and the maintenance cost is low;
[Ease of operation and maintenance] : Friendly man-machine interface, easy operation; the sensor has no zero drift, no need to re-calibrate, and the system is maintenance-free;
Five, related case display