Intelligent Lighting System Based On DALI

According to the increasing demands of green lighting, the dissertation designs the intelligent lighting system based on DALI, in order to create different lighting scenes, and save energy. In total, the dissertation does the following research.Firstly, the dissertation introduces the basic concept of the intelligent control, points out the characteristics, functions and feasibilities of the intelligent lighting system. And, the basic content, principle and application of DALI have been elaborated also. Next, comparing with analog technology and bus technology, the dissertation analyzes the advantages of DALI in the lighting system.Secondly, the dissertation develops and designs two prototypes of the digital addressable lighting ballast based on DALI and the DALI master control module. Ballast includes EMI filter, PFC section, IR21592 electric circuit, PIC16F877 module, the electrical transfer circuit and the intelligent dimming circuit etc. And, through analyzing the functions, the dissertation points out the components' choice and the circuit debug methods of the two prototypes above. The dissertation also studies the LC series resonance circuit of the fluorescent lamp in theory, analyzes the reason that the fluorescent lamp can be triggered.Thirdly, compared with the traditional RS-485 lighting control system, the system expands the lighting control area, it constructs the lighting system with three-tier configuration, which can realize the lighting system being integrated in BMS(Building Management System). And, the dissertation analyzes the communication and control principle of the system. In the management tier, the system realizes the TCP/IP communication, which based on TCP/IP protocol, between PC and ADAM4579, through using Winsock module. The communication between management tier and monitor tier is based on RS-485 bus, and the communication between monitor tier and locale tier is based on DALI protocol. DALI master control module can realize the transition between RS-485 data and DALI data. DALI data is coded in Manchester coding method. So, it completes centralized control and dispersive management in the lighting system based on DALI, which has various functions, such as digital addressing, stepless dimming, grouping, query and preset lighting scene, etc.Fourthly, it proposes and completes the application in the parking lot using the intelligent lighting system based on DALI, realizes intelligent control and energy saving. The dissertation develops the center control software system, designs the control interfacewith Visual Basic, uses Microsoft Access to establish the related databases, and, with ADO, realizes accessing entire parking lot databases freely, which store all lighting messages. The system brings forward that, with DALI system, it should separate control lighting level according to normal or specific lighting request, And, it realizes various functions, such as avoiding the illumination saltation at the entrance and exit, intelligent guidance and choosing the appropriate route, and so on.Lastly, the dissertation proposes the solution of the intelligent lighting system based on genetic algorithm. After analyzes the significance of using artificial intelligence in the lighting system, it designs the specific mathematical model, which is chosen to relate the internal plane illuminance, at a given point in any room, to the outdoor natural light illuminance. It also proposed the solution, which can realize the optimization of the model by using genetic algorithm, analyzes the principle of applying genetic algorithm to the intelligent lighting system based on DALI, which can make the most of natural light and save the energy.