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1 monitoring object
When determining the monitoring content, we adhered to the principle of "can not be resolutely avoided monitoring projects," and strive to streamline and improve system reliability. The amount of monitoring is based on telemetry and remote messaging, supplemented by remote control. When determining the monitoring volume of the municipal or county office, it includes main circuit AC voltage, AC current, important switch status, battery voltage, oil start, battery voltage, oil level, main engine room environmental parameters, various smart devices, etc. When determining the amount of branch office monitoring, it includes contents such as intelligent equipment, environment parameters of the equipment room, and detection voltage of the battery. In addition, taking into account the need for expansion of equipment, data collection and controller should have a certain amount of redundancy in the configuration.
2 The realization of the system 2.1 Planning and design principles 2.1.1 Reduce hardware bad sections, improve reliability, reduce hardware costs
Communication power and air conditioning equipment are the heart of telecommunications networks, and it is important to maintain reliability, stability and high quality operation. The centralized monitoring system is an intermediate medium between the operational personnel and the equipment operating status, and its reliability cannot be lower than the monitored equipment. The overall planning must be based on the concept of the local network, careful on-site investigation, selection of high-quality and reliable hardware equipment, use of optimized system architecture, and reduction of hardware intermediate links, such as protocol converters, communication procedures, etc., to reduce the possibility of failure Sex, improve hardware reliability, reduce costs. Use reliable communication methods (or use alternative measures) in the transmission to reduce the game rate that interrupts monitoring due to transmission failures.
2.1.2 Improve Software Performance and Increase Utility
Simple and good hardware must be equipped with powerful software to reflect the good performance of the entire system. At the same time, the software must have good practicality. During the system planning and design stage, specific requirements are put forward according to the needs of maintenance and use, and they are reflected in the design. In terms of system man-machine interface, they should be simple and friendly, and provide functions that meet the needs of duty, maintenance, and management work. The system should have good scalability.
2.2 System Scheme The scheme is based on the Yuan-Xi Telecom Bureau.
2.2.1 System Structure
• Monitoring Center SC is a local network monitoring and management center. Peer-Peer is used, and an open software HUB platform is used. Equipped with 2 PCs for connecting large screens and 2 workstations to complete the daily maintenance of monitoring; 1 high-configured server for storing history, and 1 printer for automatic fault alarming print. They are interconnected via HUB to form a star-type LAN.
• The monitoring stations SS are located in the county bureaus divided by administrative regions or in the main branch offices in the city. They are responsible for the monitoring and fault command and dispatch of each station within their jurisdiction. The monitoring station is equipped with a monitoring node PC, an engineer station and a printer. The monitoring node machine completes communication tasks with various data acquisition devices SU (including direct communication with smart devices and communication with non-intelligent device collectors) and the monitoring center SC. The engineer station completes routine maintenance work and the printer completes the printing of data. They are interconnected via HUB to form a star-type LAN.
• The monitoring unit SU is the monitoring data acquisition and processing center of each communication bureau (station), and is equipped with an industrial control PC. The SU is connected to various monitoring modules through the RS485 bus.
• The monitoring module SM is used to complete the collection and upload of various data. Unlike the above three levels, the SC, SS, and SU are all management levels, and the monitoring module SM is a data acquisition level. For smart devices, the monitoring module is a self-contained monitoring module of the smart device and completes the collection and upload of various parameters. For non-intelligent devices, the monitoring module completes the collection and upload of various power and non-battery powers.
2.2.2 Transmission Method
The interface between the monitoring unit (SU) and the smart device is RS485/422, RS232, the monitoring unit is connected with the non-intelligent device through the monitoring module (SM), and the CAN bus is adopted. The monitoring module has the digital 1/0, the analog 1/0, and the count input. The interface shall be interfaced with the non-intelligent monitoring device's phase 3 monitoring unit (SU) structure diagram. Between the SM and the SU, a fieldbus connection is used. For example, smart devices can use RS232 point-to-point communication.
The connection between the monitoring unit (SU) and the monitoring station (SS) and between the monitoring station (SS) and the monitoring center (SC) is currently available with many transmission means such as El line, DDN, and PSTN. Communication using the TCP/IP protocol can be specifically selected based on actual communication conditions and requirements. However, in order to ensure safety, both primary and backup transmission methods should be adopted and they can be automatically switched. According to the actual situation of the telecommunication sector's network, it is considered that the most convenient is to use the existing 97 network, which can achieve the purpose of sharing resources and saving investment. The power system can be used as a subsystem to connect to the 97 network. The main transmission channel of the 97 network is El and the backup channel is DDN. The branches of the branches (such as CISC02501), the County Board SS through the network card access County Office (such as CISC02514), the power monitoring center can be set up separate LAN and 97 network connection.
In areas not covered by the 97-net, a 2M time slot add/drop multiplexer can be added to each end of the SC and the SS. A time slot is extracted from the SS end to transmit the communication power centralized monitoring data. The time slot containing the communication power monitoring information is extracted to complete the transmission of monitoring data. In order to save investment, PSTN transmission may also be adopted. A modem is installed at both ends and a dial-up mode is adopted. However, this mode is unstable, and it is generally used only for transmission from branch offices to county offices.
When determining the network transmission mode, the site conditions should be selected, and the backup of the transmission router should be fully taken into consideration. For the stations (stations) covered by the 97 network, the 97 network can be preferentially selected, and the station (station) that is not covered by the 97 network can be selected. Using methods such as El pumping time slots, DDN, and PSTN dialing as backup transmission means, SDH (PDH) service channels can also be used for transmission.
2.2.3 System Hardware
The hardware selection follows the principle of reliability and practicality. The monitoring center and the monitoring station use high-performance servers and computers to form a network to perform background processing such as monitoring content display and storage; the monitoring unit (SU) in the communication office (station) is controlled by a stable industrial computer. The monitoring module (SM) is equipped according to the monitored object. The monitored objects can be divided into intelligent devices with communication interfaces and non-intelligent devices without communication interfaces. The intelligent devices can pass RS485 and RS232 according to the interface protocol provided by the device manufacturers. Data line to pick people, such as Qiaoxing power, Helos air conditioning. Non-intelligent devices use front-end data acquisition devices for monitoring, such as Y02 rectifiers and battery packs. The environmental monitoring parameters can be set up sensors and intelligent access control to achieve monitoring.
2.2.4 System Software
Monitoring Center (SC) and monitoring station (S-concave computer system software uses internationally common systems: the operating system uses WINDOWSNT, the database management system uses SYBASE, the network communication protocol uses TCP/IP, and the programming language uses Delphi 4.0. Due to the adoption of the latest software modularization and configuration design, the software BUG is reduced, the credibility of the system is improved, and the system function expansion and updating are facilitated at the same time.The monitoring system software function module structure is shown in Figure 4, the software module structure.
Main program flow:
(1) The database is the core of the entire system. Communication, operation, setup, monitoring, backup, and modules are all around the database. Utilizing the database server/client model to separate the modules can achieve a safe and reliable purpose.
(2) The communication control module decomposes, translates, and writes people's databases. First of all, after collecting the data of each end office, the corresponding array unit is stored. At the same time, the thread invokes the module types of the equipment types of various end offices and various device data translations to store the translated data in the database. A device is equivalent to a module, and its translation program is also seen as a module (subroutine) repeated calls. Each end office also considers a module, where the same type of device is a sub-module.
(3) The software operation module is only related to the database and shows the status of each end office. The parameters of various equipments display various alarms in time, and the monitoring equipment can be operated through this program, and the control signals are transmitted to the monitoring equipment by using the reverse transmission of the collected data.
(4) The monitoring module can monitor the operating status of the entire system and make judgments. The monitoring of the database, communication, and operating software can make the system run smoothly. Once a problem arises, it can prompt and write a log for later resolution.
(5) The system equipment module mainly sets various equipment information and end office information to establish a complete system.
(6) The function of the database backup module is to retain the parameters of various important equipments during system operation for mapping, analysis, and searching for causes of accidents. In addition, when the main server fails, the utilization equipment can The server is restored and the system can operate normally even after an unexpected situation occurs.
(7) The function of the alarm processing module is to display the latest alarm and issue an audible and visual alarm to remind the on-duty personnel to handle the alarm.
3 System Benefit Analysis
This benefit analysis is based on the actual operation of the power supply air-conditioning monitoring system of the Yuan-Xi Telecom Bureau. The system project has invested more than 5 million yuan to implement monitoring on more than 60 communications bureaus (stations). The average investment for each monitoring point is about 60,000 yuan. The monitoring content includes power supply, air conditioning, battery, and environment, except for the 5 major transit bureaus. With regard to the implementation of care-type maintenance, other bureaus (stations) use part-time personnel in the daytime or in the engine room and are unattended at night. The Power Equipment Division currently employs more than 80 people, and according to the traditional maintenance system, if four electric power crews are assigned to each board, 25 air conditioner maintenance personnel are required to measure, and 260 electric power crews are required overall, which saves 180 staff. Calculated on the basis of annual income of 20,000 yuan per capita, the cost savings of 3.6 million yuan a year, and one year and a half to recover the project investment.
4 Conclusion
The establishment of a centralized monitoring system for communication power supply and computer room air conditioning is a need for a telecommunications maintenance system and a need for the development of communication power supply technology. Implementation of centralized monitoring of power supply air-conditioning not only saves maintenance costs, but also enables timely and accurate control of the operation of all power equipment on the Internet, improving the quality of power supply and ensuring safe power supply. "Journal of Nanjing Normal University"
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[2] Yu Qichen. Modern telecommunications network [M]. Beijing: People's Posts and Telecommunications Press. 1993 [3J Wu Deben, Li Huimin. Information Highway [M] Beijing 2 People's Posts and Telecommunications Press. 1993
[4] Zhou Baoxin, Cui Jiping. Telecommunications New Business [MJ. Beijing z People Posts and Telecommunications Press. 1993
According to the specific requirements of the Ministry of Posts and Telecommunications for zero-growth for enterprise personnel, in order to reform power supply maintenance methods, improve the maintenance and management system of communication power supply and computer room air conditioners, improve the degree of automation, and ensure the stability and reliability of the power supply system for safe power supply and communication bureaus (stations). It is imperative that centralized power supply and computer room air conditioners be monitored centrally. The purpose of this article is to investigate the construction and implementation of the centralized power supply and computer room air-conditioning monitoring system in Wuxi, and how to achieve low input, high output, and to achieve the purpose of power equipment personnel or less.