Network coverage and construction is the foundation of the entire CMMB industry. It is the “lifelineâ€. The quality of the network directly affects the user's satisfaction. How to make the CMMB signal cover the entire region, establish its own single-frequency network and provide good signal quality. A simple matter.
As a city with a relatively early CMMB signal coverage, Shanghai has extended from the urban coverage of the first phase to the suburban county extension of the second phase, and has developed to the suburbs of the third phase. It has a small scale in the construction of CMMB network, 1KW. 16 high-power transmission stations have been built, and 5 supplementary stations in the suburbs of the third phase will be opened in the near future.
But whether it is a room system or an outdoor point, the signal comes from the transmitting station, so the signal quality of the transmitting station directly affects the effect of deep coverage, and the CMMB room is the heart of each transmitting station, which is the core of the whole system. Scientific computer room design, good computer room environment and system professional maintenance will be the guarantee of the entire CMMB signal, so the construction and maintenance of the computer room is particularly important.
Second, the current inadequacies in the broadcasting and television industry equipment roomDue to the differences between the broadcasting industry and the communications industry, due to various aspects such as engineering design, construction investment, human resources, and property resources, there are still some areas for improvement in the computer room of the broadcasting and TV industry. Most of the computer rooms are planned, designed, operated, and managed. Sex, availability, scalability, etc. need to be improved. The design of the equipment room should conform to the trend of equipment racking. It maximizes the use of space in the equipment room and racks while taking into account the heat dissipation and safety.
Planning and operation management:
At present, the domestic computer room can be summarized as "first-class equipment, second-rate design, three-stream management." First-class equipment refers to equipment in the equipment room, including transmitters and UPSs, which are the most advanced in the world. The second-flow design refers to the backward design and planning of the equipment room. Three-stream management means that management after the completion of the computer room is very difficult. The reason for this result is that users pay more attention to the construction of the computer room facilities and experience.
System and availability of the equipment room:
The environment of the equipment room does not meet or meet the requirements of the standard equipment room. There may be some unsuitable site selection at the initial stage of construction, and there are no positive adjustments in the equipment room after the environmental changes around the equipment room. This has caused some hidden dangers to the security of the equipment room. Relevant facilities should be taken seriously. Most of the supporting facilities were designed according to the design in the initial stage of the computer room construction. However, for this part of the facilities, our attention is often insufficient. It is easy to see that the supporting facilities cannot keep up with the system construction expansion or overload operation. Factors affecting the availability of the equipment room include power supply systems, air conditioning systems, monitoring systems, and rack systems.Equipment racking trend:
Users tend to ignore the problem of air distribution in the cabinet. When the equipment room is built, there is a phenomenon of local hot spots. Due to unreasonable design and maintenance, most of the equipment rooms are under negative pressure on the outside of the equipment room during operation, resulting in serious dust cleanliness in the equipment room. Management and maintenance methods of the scientific system: After the completion of the construction of the computer room, the maintenance cannot be followed up in time, resulting in unstable system operation and affecting the service life of the equipment; the technical level and experience of the maintenance personnel are insufficient, the training is not enough, and the actual operation is not skilled enough. Some equipment emergency plans have insufficient enforcement. The domestic CMMB machine room is different from the ordinary machine room. Not only is the equipment expensive, the volume is large, but the transmission power is strong and the heat is high. These problems are more obvious.In order to solve the above problems and cope with the needs of future development, the future of the equipment room will develop in the direction of high security, high availability, high flexibility, racking and energy saving.
Third, the "integration" of the computer room constructionAs an integrator authorized by Shanghai Wenguang, Aowei Communication Co., Ltd. is committed to the coverage of CMMB signals, from indoor distribution systems to outdoor signal supplements, while also shouldering the construction of the transmitting station.
Our company puts forward the concept of "integration". In the process of designing and deploying integrated equipment in the computer room, there is a necessity and possibility to achieve standardization in almost every link. We design “integrated†machine rooms for users, apply standardization to the construction of each site, and adopt the same “integrated†configuration and process of the machine room to promote industry standardization.
Since standardization can significantly improve the commercial value of the “integration†of the equipment room, that is, the improvement of availability, adaptability and total cost of ownership, it will inevitably become a strategic long-term development trend in the development of computer room integration technology.
We must avoid the inefficiency of one-time unique engineering, reduce complexity, reduce error rates, and transparently manage physical infrastructure to achieve the high quality of the infrastructure that users expect. Therefore, the "integration" of the equipment room requires us to develop standards and processes from various aspects:
1. Equipment room selection requirements
In order to ensure the stable operation of the equipment room, it is very important in a good operating environment. The location of communication room similar to CMMB is more important. It should not be in high temperature, dust, air pollution and voltage instability. Avoid places with frequent vibration or strong noise; keep away from substation.
Therefore, in the pre-engineering design, according to the technical requirements of CMMB network planning and equipment, comprehensive consideration of hydrological, geological, seismic, electric power, traffic and other factors, select the address that meets the design requirements of the communication equipment engineering environment.
2, equipment room equipment and specifications
The main function of the safety barrier is to restrict the dangerous energy in the safe place from entering the dangerous place, that is, to limit the voltage and current sent to the dangerous place.
1. Due to the tripartite isolation mode, there is no need for system grounding line, which brings great convenience to the design and on-site construction. The requirements for instruments in hazardous areas are greatly reduced, and isolated instruments are not required on site.
2. Since the signal line does not need to be grounded together, the stability and anti-interference ability of the detection and control circuit signal are greatly enhanced, so as to improve the reliability of the whole system.
3. The isolated safety barrier has stronger input signal processing ability and can accept and process thermocouple, thermal resistance, frequency and other signals, which is impossible for Zener safety barrier.
4. The isolated safety barrier [2] can output two mutually isolated signals to be used by two equipment using the same signal source, ensure that the signals of the two equipment do not interfere with each other, and improve the electrical safety insulation performance between the connected equipment.
Isolated Safety Barrier,Output Intrinsic Isolated Safety Barrier,Explosion-Proof Relay Isolated Barrier,Switch Explosion-Proof Relay Barrier
Taizhou Jiabo Instrument Technology Co., Ltd. , https://www.taizhoujbcbyq.com