1 Subway electrical and mechanical equipment monitoring and control system technology needs analysis

Subway electrical and mechanical equipment monitoring and control system technology needs analysis and countermeasures

In computer technology, the rapid development of network communication technology of today, automated monitoring system is in production and people in all aspects of life play an important role. Fast-track underground in the city, the Electrical and Mechanical Control System (BAS) also play an important role, which provide people with safe, comfortable environment, saving energy and manpower, to improve equipment management. 1 Overview

Station (BAS) is a subway station ventilation and air-conditioning range, water supply and drainage equipment, lighting equipment, equipment-oriented, automatic escalator, platform screen doors, crossing the river tunnel, such as Flood Gate surveillance and control of an automated system. In the case of a fire station with fire alarm systems and work closely with low-voltage power distribution system so that the disaster relief facilities designed in accordance with the running condition, for passengers to create comfortable, safe, reliable traveling environment through intelligent control so that energy-efficient operation of control equipment. Station (BAS) can be divided into three levels: central level, station level and at the field level. Central-level devices including servers, workstations (server, workstations are shared with other systems), all network equipment and network connections. When installing a comprehensive automation system at the same time, the electrical and mechanical equipment of the central monitoring system by the integrated automation equipment, general system configuration. The main function of the central level include: all mechanical and electrical equipment monitoring system data (including equipment, information and environmental information) of the collection, storage, management, and output; receive automatic fire alarm system, fire information sent to the accident report to the police, if necessary, on all mechanical and electrical equipment monitoring system related to equipment control mode control and single point of control. Station level equipment including workstations, emergency back-up disk

(IBP), controller, network stations and network connections. At the same time, set up in integrated automation systems, electrical and mechanical equipment of the station-level monitoring system workstations combined with other systems in general by the integrated automation system configuration. Operation of the station-level management functions include: stations and electrical and mechanical equipment under the jurisdiction of interval data monitoring system (including equipment, information and environmental information) of the collection, storage, management, and output (including the printing, the screen display on the workstation and uploaded to the control Center); to receive automatic fire alarm system sent a message of fire and accident report to the police, under the jurisdiction of equipment on mode control and single point of control. Station-level control layer functions include: range of stations and under the jurisdiction of the ventilation air-conditioning, water supply and drainage equipment, lighting equipment, equipment-oriented, automatic escalator, platform screen doors, cross-river tunnel Flood Gate of electrical and mechanical equipment such as monitoring, control on the part of the equipment; of ventilation and air conditioning control system to optimize its energy-saving operation; in the Electrical and Mechanical Control System station failure or emergency situations, providing important fire start mode manual mode control of the emergency button. To the workstation or in the receiving automatic fire alarm system (FAS) to send the fire command mode, the automatic removal of non-fire power, according to the fire to start the appropriate mode of ventilation fans, air valve, start-driven equipment; or manually set in accordance with IBP button to carry out the directives issued by the relevant operation. The main equipment at the field level including on-site controller and network communications equipment, sensors. Equipment at the field level is the main function: local control of equipment to meet on-site equipment testing requirements; the completion of on-site signal acquisition, signal conversion and output control signals. 2 features

Electrical and Mechanical Control System station can be considered as a

building automation system (BAS) a, the electrical and mechanical equipment monitoring system is sometimes also called as a BAS, it has a building automation system, the general characteristics. At the same time, monitoring of mechanical and electrical equipment as a result of the railway system was applied to the special environment, it has a lot different from the general characteristics of building automation systems.

(1) Electrical and Mechanical Control System with other systems, multi-device interface. At present, the electrical and mechanical equipment monitoring system and integrated automation, low-voltage distribution, lighting and direction, ventilation and air conditioning, water supply and drainage, escalators and elevators, automatic fire alarm, PSD and Flood Gate and many other system interfaces. In order to facilitate the equipment with other systems, and reliable exchange, the Internet, require mechanical and electrical equipment has a good monitoring system openness.

(2) The investment in land by the construction and many other factors, the need for construction and implementation stages, is generally case-by-line construction, even with the sub-lines also require the construction. Lines in a multi-intersection of the transfer station, a station monitoring system of electrical and mechanical equipment will belong to a few lines at the same time. All these require that electrical and mechanical equipment monitoring system has good scalability.

(3) the same equipment in order to avoid duplication, reduce investment in day-to-day use of subway ventilation, air-conditioning system and smoke, smoke extraction system combined with mechanical and electrical equipment to monitor the implementation of joint control system. Mechanical and electrical equipment which requires a good monitoring system availability.

(4) railway operating environment of the dust density is higher than in the general environment of the buildings, which contain the ingredients are also very complex, and more humid, so that electrical and mechanical equipment monitoring and control system equipment components by dust, tidal erosion, premature aging or damage . In addition, the dust caused by electrostatic induction equipment are subject to different

levels of interference. All these require that electrical and mechanical equipment monitoring system with better protection against dust, moisture resistant.

(5) of the equipment in the subway area, high-strength low-voltage and power are often cross-cutting or laying with the regional phenomenon, difficult to each other to avoid interference, the electromagnetic environment is a source of electromagnetic interference by a number consisting of an integrated electromagnetic environment. Train in the road moments arc process, which brought about a greater sphere of influence of electromagnetic interference; Electrical and Mechanical Control System for DC 24V equipment and components, and its sensitive components susceptible to electromagnetic interference. This requires equipment, electrical and mechanical equipment monitoring system has a good anti-interference ability.

(6) the length of a subway line in the 10 km or more generally, and the distance between two stations at 1 km above the general. This means that the electrical and mechanical equipment monitoring system comprising a separate network of their own higher costs across the board to require mechanical and electrical equipment monitoring system with other systems to share information transmission network between stations.

(7) in the electrical and mechanical equipment monitoring system to monitor the object in subway ventilation and air conditioning system is energy-hungry operations, therefore, through the Electrical and Mechanical Control System so that intelligent control of ventilation and air conditioning systems running energy-saving operation for improving the subway economy is particularly important. 3 Countermeasures

3.1 to ensure the openness and good scalability

Good scalability and openness of the environment is not only a special subway monitoring system for electrical and mechanical equipment requirements, development of automation systems is the inevitable result. Open with good scalability to the achievement of the interoperability of equipment from different manufacturers, the Internet, interoperability, and even the replacement of mutual

back-up and interoperability will help to break the monopoly, to encourage fair competition, so that the owners from the shackles of proprietary systems, better products and services. In order to make the open system has good scalability and, electrical and mechanical equipment monitoring and control system hardware and software should be open, standardized and modular design. In terms of software, electrical and mechanical equipment monitoring system should be introduced into the process control in the Object Linking and Embedding (OLE for process COB-trol, OPC), in order to enhance openness and scalability. OPC is open connectivity standards, it will visit the scene of the development of mission equipment in the form of standard interfaces on the equipment manufacturer or a third party, and the form of interface to the server transparently to the user, a reliable system for different Connect to create the conditions to provide real interoperability, to ensure good scalability. In terms of hardware. Industrial Ethernet to achieve the management, control layer, site layer, \improve overall system performance, reduce maintenance personnel training and maintenance tasks, are highly open and scalable sexual. With the maturing of industrial Ethernet to solve real-time communications, bus-powered, intrinsically safe, long-distance transmission and so on. Anti-interference ability, high reliability industrial Ethernet, will be the Mass Transit Railway Electrical and Mechanical Control System Control System the best choice for the network.

3.2 focus on the use of operations management methods and control of decentralized

Railway Electrical and Mechanical Control System hardware design should be high and fast the wrong anti-recovery capabilities. Equipment can be divided into 4 categories of accused: not only to monitor control and prevention equipment has nothing to do, not only to monitor control and prevention-related equipment, both to monitor and control equipment has nothing to do with the prevention, surveillance and control of both prevention related equipment. Different types of equipment to control the requirements are different, with different levels should be the controller.