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The smart home network urban rail transit is booming, and its social benefits are increasingly recognized by people. The station lighting system is related to the service quality of the station and the operating cost. Therefore, under the national policy of energy saving and emission reduction, the intelligent lighting control system is one of the focuses of the metro operation department and the design department. At present, compared with the traditional lighting control system, the intelligent lighting control system is recognized by people because of its flexible and humanized characteristics, and it is more and more widely used in practical applications.
To meet the comfort of passengers as the primary purpose, according to the different areas, the normal lighting of the subway station is divided into equipment area lighting and public area lighting (including entrance and exit lighting). The equipment area lighting is generally controlled by a rocker switch set at the door of the room. For a large room, when there are many lamps, it is controlled by double, triple, quadruple switch or multiple switches. Since the equipment room of the subway only allows authorized staff to enter, it is basically able to save electricity when people turn on the lights and people turn off the lights. For public areas, lighting must ensure a certain illumination and uniformity, and control the number of long-lights. It is necessary to build complex power distribution by increasing the loop of the lighting distribution box and cross-wiring. The line, by controlling the lighting circuit to achieve power saving function.
The lighting requirements of the public areas of the subway station are relatively high. Firstly, the passengers should be provided with a comfortable lighting environment to make the lighting humanized. At the same time, through reasonable management, the lamps can be turned on at the required time and area to optimize energy utilization. Management, flexible and low-cost lighting control system.
In the traditional lighting control system, the lighting in the public area of ​​the station is distributed through two types of lighting distribution boxes (basic lighting distribution box and superimposed lighting distribution box) and controlled by the equipment management system (referred to as BAS system). : At the peak of operation, all open; after the peak of operation, the superimposed lighting can be turned off, and the basic lighting and evacuation lighting are used as the public area lighting; after the end of the operation, all the basic lighting can be turned off as needed, and the evacuation lighting is used as the public area duty and security guard. illumination.
The normal lighting of the public area of ​​the station is controlled locally by the lighting distribution room, and is centrally controlled and remotely monitored by the BAS system located in the comprehensive control room of the station. According to the time division, the lamps are controlled to perform full-bright, partial-bright and all-bright control, so as to achieve relative energy-saving control.
Six characteristics of the control system The characteristic intelligent lighting control system is a distributed control network lighting management system composed of a field data bus. All components have a built-in processor, and each component on the network has an address that splits all components through a bus into a single control network.
The intelligent lighting control system is composed of a control component, an execution component, a monitoring component, and a network component. The control component includes a control panel, a touch display screen, a detector, a controller, a smart clock, a user editor, etc.; the execution component includes a dimming module, a switch module, and the like; and the monitoring component includes a communication cable, a gateway, and the like. The intelligent lighting control system can realize the brightness control of each lamp or loop through the programming of each controller and panel according to the needs of the system, thereby achieving different lighting scenes and system control effects.
The intelligent lighting control system has the following characteristics: First, the intelligent lighting control system has various control methods. Field panel manual control, light sensing control, motion sensing control, infrared remote control, timing control, scene control, central control. Second, the size of the intelligent lighting control system control module is standard modular design, small size, no additional control box is required. The third is a fully decentralized modular structure, components can be dispersed, each component has a built-in microprocessor, each component can work independently, does not require host control, and the components are in a peer relationship. Any component damage will not affect other components. The operation of the component. Fourth, a light sensor can be installed at the entrance and exit of the underground station and the ground station. The light switch can be automatically controlled according to the illumination of natural light. When the natural light is sufficient, the light can be automatically turned off to achieve energy saving.
Fifth, it can be linked with fire protection, cut off advertising lighting and normal lighting during fire alarm, and set the priority level of fire alarm control to the highest. In the fire alarm, the on-site panel or timing control will not work, improving safety. . The sixth is to have the system equipment monitoring function, which can monitor the communication status of the equipment distributed in different distribution boxes in different locations in the system. Once the equipment is found to be unable to communicate normally, it is immediately displayed on the central control computer to facilitate the maintenance of the operation department.
More flexible control method The traditional lighting control scheme is based on the BAS system. It can only perform simple group control and time control on the lighting facilities. The intelligent lighting control system can intelligently manage the lighting of the station, according to the user. Demand control group control and time control for each lighting circuit, and also added scene control, dimming control and sensor control for lighting facilities.
If you use the BAS system to control each lighting circuit, you need to increase the volume of the lighting box, and the I/O module of the BAS system needs to be increased accordingly. The intelligent lighting control system is modular, and you do not need to increase the volume of the lighting box. The above group control and time control are achieved.
Comparison with the station BAS interface. The traditional lighting control system realizes the automatic control of the BAS system through the contactor and the secondary control component. According to the position of the secondary control component placement, centralized and decentralized, distributed or control components are placed in each power distribution. In the box; centralized control is to set up a control box in a certain room (duty room or power distribution room), the secondary control components of each lighting are placed in the control box, and the control signals are connected to the field power distribution through the control cable. The contactor of the box. The interface between the traditional lighting control system and the BAS system is at the secondary terminal of the lighting control box, and the interface form is a passive dry contact.
The intelligent lighting control system is an internal independent system, the internal wiring is through the bus form, and the interface with the BAS system is interfaced with the host of the intelligent lighting control system, and the interface form is a communication interface. This way the BAS system can save a lot of cables.