Design And Application Of RDM Technology Based On DMX Landscape Lighting System

With the national urbanization planning,more and more cities need to express the attractiveness of their night scenery and show the unique charm of the city.With the increase of diversi:fication of night life,lighting has changed from functional lighting of original single public facilities to urban night landscape lighting.As a very important part of urban planning,it not only reflects the financial development of new cities,but also reflects the civilized degree and cultural background of cities.Nightscape lighting refers to a kind of lighting landscape created by combining natural light and light at night.Urban night lighting is the use of lighting to rebuild the image of the night city.With the increasing depth and breadth of landscape lighting demand,the scale of control is increasing.How to achieve large-scale stability control and reduce the difficulty of maintenance of landscape lighting becomes particularly important.In this paper,the problem of information feedback of landscape lighting control system is studied,and the application of RDM(Remote Deployment Manager)information feedback technology to large-scale outdoor landscape lighting is studied.The lighting control system based on ART-Net network protocol and DMX512 protocol is designed to realize the application of RDM technology in outdoor landscape lighting.It has a positive demonstration effect on the popularization and application of advanced landscape lighting control system.The main work of this thesis is as follows:(1)The characteristics of Art-Net network protocol and DMX512 protocol are analyzed,and the control system architecture combining the two protocols is built to expand the control scale and realize remote control.The protocol meets the engineering requirements,and is simple.reliable and convenient to expand.(2)According to the characteristics of Guangzhou Nightscape Lighting Project and the actual needs of bidders,a control system is built based on network technology and DMX512 protocol technology.The controller realizes on-line,off-line master-slave synchronization and automatic conversion between single-machine working modes.In order to ensure the stability of the system,detailed technical parameters are proposed for the main equipment and debugging is completed.(3)For the first time,RDM information feedback technology is applied in a large number of outdoor night lighting projects.This paper presents a new method to make RDM protocol compatible with existing DMX512 infrastructure.The data frames sent to the DMX512 client are split and repackaged as RDM data packets.The RDM data packets are transmitted to the RDM module controller and converted to DMX512 data frames in response to RDM data packets,which are used to control DMX512 devices and form a two-way convertible closed-loop control system model between the DMX512 frameworks.This method can not only upgrade the feedback function of the original DMX512 system without changing the existing infrastructure,but also solve the compatibility problem between the new RDM device and the original DMX device.Experiments show that the method is feasible,and it has been successfully applied to practical projects,running well.(4)Solve the problems and solutions of lighting failure encountered in this project,and provide guidance for other landscape lighting projects.