Research On BIM-based Architectural Lighting Simulation Design Software

With the improvement of the level of people’s living and the development of the technology,the design method of architectural lighting integration has become more and more popular among the public,providing architects and lighting engineers with a lighting building integration simulation software designed collaboratively under the health lighting evaluation system.Is a new way to achieve integrated lighting for architectural lighting.First of all,this paper reviewed the literatures from home and abroad,and finds that the lighting software on the market can not meet the needs of architectural lighting and healthy lighting.Then,I found that Building Information Modeling(BIM)technology can achieve the collaborative design of building and lighting in the same interface,and meet the requirements of lighting integrated simulation design.Based on the above research,according to the requirements of architectural lighting integration,the overall architecture of the method module is designed,and the two technical means of BIM system "application program interface" and "information format conversion" are alternately used to read and return the architectural information in BIM system and the lighting information in lighting software,so as to realize the organic combination of LED light source / lamp and architectural interface or components,so as to achieve Building and lighting design integration,information integration.At the same time,the functions of each module are clarified,including building information model module for lighting,integrated lighting information module,calculation grid module,core algorithm module,calculation results and report module,and the realization method of integrated index calculation module.In this paper,the core algorithm module and the integrated index calculation module are selected to carry out the key research.In the aspect of core algorithm,because it is difficult to develop an accurate lighting simulation core independently and takes too long,we hope to find a more accurate computing core for indoor artificial lighting.Through literature review,two popular algorithms are found out,and two indoor lighting simulation software based on BIM Technology are selected.Comparing the physical accuracy of these two softwares with the experimental case of CIE 171-2006 lighting computer software accuracy evaluation issued by CIE,analyzing the advantages and disadvantages of the two softwares,and finally selecting a more accurate software as the core algorithm of this method.In terms of the integrated index calculation module,taking the development of spatial luminance coefficient(Feu)as an example,a plug-in of spatial luminance coefficient analysis system is developed on the BIM platform with C#,which complements the part of health lighting index that cannot be calculated by the core algorithm,puts forward the realization method and tests the finished software.Based on the BIM platform,this paper realizes the methodology research of integrated lighting simulation software.The research results not only provide the possibility for architectural designers in the field of lighting design,but also provide reference and practical guidance for the follow-up research of lighting simulation under BIM Technology.