In recent years, with the rapid development of Chinese real estate industry, intelligent building industry has developed very rapidly, all kinds of high-grade residential communities, government office buildings, business real estate, public buildings and intelligent home applications are more and more extensive, the requirements of intelligent functions more diversified and comprehensive. At the same time, intelligent system is a high degree of system integration of a project, it has strong requirements for the integration and compatibility of technology, involving many fields, including from electrical, electronic, computer, automation to HVAC, system integration and other aspects of the content. Intelligent lighting system is one of the subsystems which is widely used and easily confused with building automatic control system in practical operation.

In the lighting system design of the existing intelligent buildings, the old design method is generally used, or in the previous lighting design system, the special control or regional control and timing switch are realized simply by connecting the contacts controlled by the building automation system (BAS) in the lighting loop, adding the central monitoring function, etc., and the infrared induction is added to realize the shape control. Of course, this method of control has its obvious limitations:

1) Economy: In order to save costs, the number of electrical circuits designed in this way is generally small, and the design often only focuses on the control of a large area. If the electrical circuit is subdivided from the perspective of humanization and energy saving, it will cause a large increase in the cost of an investment, which is what investors do not want to see. But fewer loops, in turn, significantly increase the ultimate owner's usage costs (electricity).

2) Convenience: Because switches are usually not set on site in this kind of design, and all lighting circuits are centrally controlled through BA central control room, users cannot switch and adjust according to the actual situation on site, and cannot interfere with the state and illumination of lighting, which brings very inconvenience to actual use. At the same time. As the control function is too simple, the traditional lighting design +BAS mode can only realize the function of simple timing switch. If the scene presetting, scene transformation and brightness adjustment of a specific area are to be realized, the technical difficulty of actual operation is quite large.

3) Independence: Since this kind of simple superimposed lighting system is not a truly independent subsystem, when BAS fails, the lighting system will be affected at the same time, especially for lighting circuits with emergency evacuation lighting function, which is absolutely unforgivable.

Intelligent lighting system (LLS) is an intelligent system developed specifically for lighting needs. It can not only operate independently, but also achieve the effect that the traditional lighting design in the existing intelligent building can not achieve. For example, Shanghai Di Control CNCOMATE intelligent lighting system, it has embedded web page servo controller, and compared with BA system control is more simple, but also can meet the needs of general building lighting control. Intelligent lighting system based on system bus, its open protocol, flexible connection mode, well ensure the openness of the system. Its main functions and characteristics are as follows:

1. Simple design is more economical. The lighting circuit design of the system is simple, the system installation is convenient, the operation and maintenance is easy, the software is programmable and the hardware is flexible structure, greatly saving the construction developer's investment cost and maintenance operation cost, shorten the installation period, improve the return on investment. The input, output and system support units in the system can be connected through the intelligent lighting system controller, large section of the load cable from the output unit of the output directly connected to the lighting fixture or other electrical load without going through the switch, installation without considering any control relationship, after the installation of the whole system through the software to set the address code of each unit. Thus the corresponding control relationship is established. Installation only between the output unit and the load using load cable connection, can save a lot of cables, but also shorten the construction time and labor costs.

2. Intelligent control saves social cost. Intelligent lighting system uses control software for remote control and central monitoring of the entire lighting system, which can be easily modified according to user requirements at any time. When the lighting control relationship needs to be changed for some reason, you only need to modify it in the software instead of relaying the cable. At the same time, due to the use of infrared sensor, brightness sensor, timing switch and dimmable technology and intelligent operation mode, to achieve any single point, double point, multi-point, area, group logic control, timing switch, brightness hand/automatic adjustment, infrared monitoring, remote control, scene combination and other lighting control functions, not only can show rich lighting effects, So that the entire lighting system can be in accordance with the best economic plan to accurately operate, thus greatly reducing the operation and management costs, the maximum energy savings. And compared with the traditional lighting control mode, but also can save energy, reduce the use of costs, so as to achieve social cost savings.

3. It can better reflect the compatibility and functional diversity of the system. Since each input and output unit in the system is stored with system status and control instructions, no data will be lost after power failure. When power is restored, the system will automatically restore the working state before power failure according to preset memory parameters, realizing unattended operation. At the same time, the control loop is separated from the load loop, and the input and output unit is only connected with a two-core control line as the bus, which can add a new control unit in the network at any time. The design of distributed intelligent control and open system can make it well combined with other building management system (BMS), building automatic control system (BA), security and fire protection system, so as to improve the level of property intelligent management, in line with the development trend of modern life. As long as the system administrator according to the user needs and changes in the external environment, just modify the software Settings, or a small amount of transformation of the line, you can adjust the lighting layout and expand the function, suitable for commercial, industrial, home use of different requirements. If the intelligent lighting system is taken into account in the design of the building with BA system, the intelligent degree of the building will be improved.