Characteristics and application of intelligent lighting dimming control system

The connection method of the line.

As an important part of the modern intelligent building automation control system (BAS), the intelligent lighting dimming control system not only meets the visual environment of intelligent buildings, but also in certain places such as: gymnasium, exhibition hall, theater theater, banquet hall, conference Halls, multi-purpose halls, etc., where lighting has some specific requirements and where it is necessary to comprehensively manage lighting. This paper only briefly discusses the characteristics and practical applications of intelligent lighting control systems.

1 Intelligent lighting dimming control system application features versatility. A good office space requires proper illumination and limited glare. Stadiums and theaters require different lighting effects in different functions such as competitions, performances, conferences, movies, etc. Conference halls, multi-purpose halls, banquet halls, etc., as well as cocktail parties, press conferences, education and training, etc. There are different requirements. Therefore the control device must meet these requirements.

flexibility. The diversity of functions, changes in seasons, differences in climate conditions and outdoor sunlight, and changes in room furnishings and furnishings require flexibility in lighting and may change at any time. Even the same situation will vary depending on the preferences and moods of different people.

Comfort. High lighting quality, in addition to the appropriate illumination, should limit the glare and strobe as much as possible, but also pay attention to the static and dynamic balance of the brightness of the light to meet the comfort requirements of people.

artistry. Stage and TV professional lighting dimming requirements are gradually adopted in general environmental lighting, especially the artistic atmosphere of hotels, bars, clubs and buildings exterior lighting, making the environment more vivid and rich, more appealing.

2 The intelligent economy control system of the intelligent lighting dimming control system changes the brightness to meet the lighting requirements through the preset of the scene, and does not need to achieve 100% of the total load brightness. In some cases, some circuits can be bright 80%, 50%, or even 0. %, thereby reducing power consumption and achieving energy saving purposes. For some light sources such as incandescent lamps, proper voltage reduction can extend the service life. It also suppresses grid surges and makes the light source last longer. From the above two points, it will inevitably reduce the maintenance, maintenance and management costs of the line and the light source. The lighting control system can make the illumination of the working environment more uniform, the strobe and glare are minimized, and it will not cause eye fatigue and dizziness, which creates a good condition for the improvement of work efficiency. The artistic effect will undoubtedly bring indirect economic benefits.

3 Intelligent lighting dimming control system components Intelligent lighting control systems are usually distributed and centralized, and most of them currently adopt modular design. The system is mainly composed of dimming module: 2003-05-07 yuan and control panel, replacing the traditional power distribution cabinet and switch. The basic form of control is as follows.

Each module unit of the distributed system has no primary and secondary points on the control network, and can independently store and write scenes, sequences and other modes without a shared central processing unit.

Therefore, it can minimize the probability of causing the overall system to collapse due to the failure of the central processing unit. However, the overall cost is higher than the centralized one. Typical manufacturers are Australian Dynalite products. The centralized system has a main control unit and a sub-control unit. The system central processor is installed in the main control unit, and the auxiliary control unit has only the decoder. Although the stability of the central processing unit is very high, this method will still cause the whole system to be uncontrolled by the panel due to the failure of the central processing unit, but the brightness of the last scene can be preserved. The overall cost is lower than the former. Typical manufacturer Aitustar's Aurostar series. Other manufacturers, Qisheng C-bus, Germany's Merten's EIB products mainly focus on control, the single-loop maximum power is smaller than the former, only a few hundred watts, the dimming concept is not too strong, mainly used in small power places.

Several manufacturers' control panels are similar, four or eight scene panels, multi-function panels, pusher panels, etc. to meet different requirements, as well as panel lock, remote control, up and down fine-tuning and clock control and other different functions.

4 The practical application of intelligent lighting dimming control system 4.1 Connection mode of control system Most of the connection mode of the system is connected by the control module unit through one signal cable, and the panel is connected by another signal cable.

Each module unit and control panel are connected in a hand-in-hand manner. A small part is connected by a signal cable, such as Merten's EIB product.

Daisy chain connections are also available. The foreign useful carrier mode is connected to the control panel. This method has high precision requirements and has not been adopted in China.

4.2 Connection with Intelligent Bus Intelligent Bus Control BUS is widely used in the building electrical industry. Lonworks and InstabusEIB. There are two forms of connection between the lighting dimming control system and the external bus. One is to switch the trigger control panel through infrared detectors, relays, light-sensing devices and other related electrical components, or by directly writing the control panel program to the device with read/write function on the bus. Such as the joint application of Aurostar in the China Radio, Film and Television Bureau's video conference center and the CRESTRON control system. Such as. The other is to achieve unified control by using a unified communication protocol to become a node in an intelligent network system.

4.3 The actual design method In the actual use process, for the entire intelligent building according to the functional division, there are usually office areas, lobby foyer, restaurant, conference room, multi-function hall and so on. For the banquet hall, theater, and stadium, it can be controlled as an independent whole or divided into several areas to achieve different effects. The following is a brief description of the design method steps using a simple conference room as an example.

(1) Prepare a list of lighting circuit loads. Group all the lighting devices, the light sources are not divided into the same group, so as not to affect the dimming characteristics, and even cause equipment failure. Count the single power and total power of each loop, mark the load type, set the load dimming curve, and list the loop load table. See Table 1. Table 1 loop load table (power unit W) loop name number single power total power Load type track light incandescent downlight 2 incandescent light trough fluorescent lamp wall lamp incandescent dimming control equipment selection. According to the above circuit table, select the equipment manufacturer dimming module unit specification model, as above, select four loops, 6A or 10A dimming module unit. As a conference room, the scene usually has “preparation, conference, training, AV display”, and corresponding to the optional four scene control panel.

Consider intelligent networking with other devices. Consider clock control, emergency lighting control, and manual remote control as needed. Each manufacturer usually has some accessories to perform other functions or to connect to other networks to achieve specific functions. For example, motion detection, illumination compensation, curtain linkage, AV system access and disconnection. The lighting control system can also be integrated as a subsystem into the building intelligence system.

The layout of the scene. The preset scene needs to be determined according to different functions of the conference room, such as “preparation, conference, training, AV display”, see Table 2. Table 2 scene layout scheme loop name scene 1 scene 2 scene 3 scene 4 track light 2 light The characteristics of the intelligent lighting dimming control system and the common design methods are briefly analyzed. The use and economic benefits of intelligent lighting dimming control systems are obvious. As a high-tech, especially the continuous development of the economy, intelligent buildings, various cultural facilities are increasing, and its application prospects will certainly be better.

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