IDC Data Center——Application Technology Solutions

1. Why do IDC data centers use fiber optic temperature sensors?

        Data centers have very high temperature requirements and need to maintain a constant temperature 365 days a year. However, in fact, the temperature at different locations inside the data center room is different. If the ventilation is not good, the temperature can differ by several degrees even in the same data center. In this way, the temperature at a local location is relatively high, and the equipment in this location for a long time 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 resistor sensors, thermocouple sensors, special semiconductor sensors, etc. However, this method has a small single-point measurement range, complex wiring, easy damage, and a large maintenance workload. Often, only 1 to 2 temperature collection points are set in a channel. The number of collection points is too small to detect the inlet and outlet air temperatures of each cabinet. It is difficult to monitor the local hot spots or local over-cooling points in the room. The actual effect is not very good in use, and it cannot fully reflect the real temperature of all local points in the room. If these collected temperature data are inaccurate, and there are even many missing local points, it cannot provide meaningful data for data center energy-saving optimization, provide reference for accurate air supply of air conditioners, and even fail to detect local over-temperature points in time, which poses serious safety hazards.

How to solve the problem of temperature monitoring inside the data center?

        Fiber optic temperature measurement technology provides a possibility. Fiber optic 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 pulse emitted by the light source is transmitted along the optical cable after passing through a wavelength division multiplexer. During the transmission process, it has the same effect as the optical fiber molecules, generating spontaneous Raman scattered light, of which Stokes light is insensitive 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. Since the Raman scattering signals generated at different positions of the optical cable are transmitted to the detector at different times, the location where the Raman scattering occurs can be determined by detecting the signal return time. Combined with high-speed signal acquisition and data processing technology, the temperature information of any point on the entire optical cable can be accurately and quickly obtained. This technology has been widely used in the fields of power, petrochemicals, tunnels, and construction. Since the spatial resolution, temperature accuracy, measurement range, and measurement time of optical fiber temperature measurement are quite different, it is rarely used in data centers with high accuracy requirements. With the improvement of optical fiber temperature measurement technology in recent years, it has become possible for optical fiber temperature measurement to enter data centers. In the data center, a single optical fiber is used for temperature monitoring and signal transmission. The fiber Raman scattering effect and optical time-domain reflectometry measurement technology are used to measure the spatial temperature distribution along the optical fiber in real time, which can realize real-time and accurate temperature information collection at any specified measurement point.

Advantages of fiber optic temperature measurement

        Compared with the traditional temperature monitoring system in the data center, fiber optic temperature measurement has many advantages. First, in the data center, fiber optic laying has been spread throughout the entire data center. As long as there are equipment and business traffic, there is fiber optic, 100% coverage of the monitoring area, no measurement blind area. Secondly, because the fiber optic sensor uses wavelength encoding 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 fiber optic sensor has a simple structure, small size, and does not take up space. Traditional temperature monitors are generally hung on the ceiling, which is still a certain distance from the equipment area. The monitored temperature data is inaccurate and is not sensitive to local temperature. If placed near the frame, it will take up a lot of space. Sometimes this method cannot be implemented at all, so traditional temperature monitors are installed on the ceiling. Third, fiber optic temperature measurement is resistant to electromagnetic interference, corrosion, and explosion-proof. It 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. Fiber optic temperature measurement also has good insulation performance and is suitable for installation in high and low voltage power distribution equipment. Finally, optical fiber temperature measurement is sensitive and real-time. The monitoring system can display the temperature along the optical fiber in real time and draw a temperature distribution map, which is intuitive and effective. Through the temperature map, you can see at a glance where the temperature is high. When the temperature exceeds the threshold, it will provide alarm information in time and accurately locate the alarm position, and directly feedback the alarm information to the data center monitoring personnel. It is precisely because of these advantages that the deployment of optical fiber temperature measurement technology in data centers has become possible.

2. IDC Data Center Data Security Monitoring System

Advantages:

        Comprehensive, all-fiber, long-distance, inherently explosion-proof;

        Power environment, computer room environment, slow change + sudden change

        Guangdong Telecom has completed more than 10

3. The significance of IDC data room detection

        Through optical fiber temperature measurement, we can well grasp the real-time temperature distribution map of the entire data center, which provides us with reference data for the construction of green data centers. Using optical fiber temperature measurement technology can make the air conditioning system in the best energy-saving state and eliminate the problem of internal local hot spots; using optical fiber temperature measurement has strong reliability, stable operation, and simple construction and installation; using optical fiber temperature measurement improves the maintainability and management level of the data center, etc., which 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 plays a significant role. Although optical fiber temperature measurement has so many benefits, in practice, it is rarely used, especially in the computer room of domestic data centers, and is still in the initial development stage. In foreign countries, optical fiber temperature measurement is already a very mature technical application. This is mainly because the accuracy of domestic optical fiber temperature measurement technology is not enough, and the price of foreign technology products is too high. During installation, the air conditioning feedback control interface is also relatively complicated, requiring professional installation and post-maintenance, and the technical requirements are relatively high. This makes it basically impossible to see the application of optical fiber temperature measurement technology in domestic data centers. Of course, optical fiber is only deployed where there are interconnected devices. It cannot cover places far from the cabinets. Although the possibility of high heat in these places is not high, it is better to have temperature monitoring just in case. So if possible, in a data center, it is best to combine traditional temperature monitoring and optical fiber temperature measurement. Some temperature monitoring probes can be installed in places that are not covered by optical fiber deployment to collect temperature information. In this way, the temperature of all places inside the data center can be known, so as to monitor the overall temperature.

        As people's concept of building green data centers improves, fiber optic 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 analytical data for building green data centers. In data centers, fiber optic temperature measurement technology will surely receive more attention and development.

4. Application of Haoyuan DTS Distributed Optical Fiber Temperature Measurement System

        This system uses today's advanced optoelectronic technology, communication technology, microprocessor technology, digital temperature sensor technology and original low temperature, strong electric field and humid environment operation technology. It can monitor the temperature in different environments, detect potential accidents early and minimize losses. At the same time, it can also provide a large amount of online monitoring data, providing a reliable basis for operators to fully understand the operation of power equipment.

Features of DTS distributed optical fiber temperature monitoring system

[Advancedness]: Based on the internationally popular 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]: Optical fiber is used as the medium for temperature sensing and signal transmission. The sensor does not need power supply to work, is inherently safe, has excellent insulation performance and anti-electromagnetic interference, and the sensor installation meets safety regulations;

[Stability and Accuracy]: Temperature data is obtained by detecting the movement of light wavelength. The sensor is only sensitive to temperature, avoiding the problem that traditional sensors are easily affected by interference factors such as power supply fluctuations and transmission line losses. The system is stable and reliable; the temperature measurement accuracy reaches ± 1℃, the temperature resolution reaches 0.1℃;

[Long-term operation with high reliability]: The system runs safely and reliably, with stable performance, suitable for long-term continuous operation in harsh environments;

[Compatibility]: The monitoring host has its own standard communication interface, providing Ethernet port, RS232, USB, etc., combined with the integrated automation system of the variable power station, to achieve data sharing, simple management, and seamless connection with related systems;

[Economical]: The system cost is economical and reasonable, with high cost performance. After it is built and put into use, it can work unattended for a long time, with low maintenance cost;

[Ease of operation and maintenance]: The human-machine interface is friendly and easy to operate; the sensor has no zero drift, no need to calibrate again, and the system is maintenance-free;

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