The Study Of City Regional Environmental Noise On-Line Monitoring System

Regional environmental noise monitoring of city is conventional testing work of environmental monitoring department, its objects is realizing integral status of city sound environment quality.Architecture of city regional environmental noise is a complex noise pollution system, it relates to many environmental information, it has characteristic of obviously spatial layout in addition timeliness and dynamic, therefore powerful computer technique must be taken to establish noise monitoring net of entire city region for regional environmental noise monitoring of city.The thesis was illustrated Beijing city, a series of problems of city regional environmental noise on-line monitoring integrated development of Beijing regional environmental noise on-line monitoring system were studied in the thesis. State of current city regional environmental noise and noise monitoring was analysed, problems were listed in the thesis. Geographical information system,code division multiple access and database technique were introduced, necessity and feasibility of establishing city regional environmental noise monitoring system based on computer technique were expatiated in the thesis. Designing object,principle,structure,main function,development and run environment of system software and hardware etc. were confirmed through investigation,analysis and contrasting with other national and foreign noise monitoring system.The main study results of thesis were as follows: Map of Beijing was digitized using MapGIS geographical information system;Noise monitoring terminal was selected, and effective modification was done so as to it could collect,process,restore noise data and transmit data based on CDMA...