Research On Remote Monitoring System Of In-situ Spectral Water Quality Analysis

With the rapid development of national science and technology,the threat of ecological environment pollution is gradually increasing.The pollution caused by industrial wastewater,municipal drainage and agricultural water is more and more dangerous to people’s health.In-situ water quality analysis technology obtains the pollutant information in the original water sample through the spectral detection of the ultraviolet band of the water body,which is suitable for real-time online monitoring of surface water quality.In this paper,a buoy type online remote water quality monitoring method is used to design a set of in-situ monitoring system for online collection of multi-parameter information of ultraviolet spectrum and water quality.The system is composed of five parts: ultraviolet multi-spectral monitoring equipment,multi-parameter water quality sensor,data transmission system,solar power supply system and monitoring server.It realizes real-time online monitoring of multiple parameters such as conductivity,COD,water temperature and dissolved oxygen in water.Secondly,the potassium hydrogen phthalate solution was used to model and calibrate the spectroscopic equipment,a multivariate statistical analysis model and a spectral likelihood analysis model were established,and the Jingye Lake of Tianjin University was monitored online for more than one year,using the factor analysis method.The changes of various water quality parameters of Jingye Lake are discussed,and the main pollution factors of Jingye Lake in different seasons are analyzed.Based on the monitoring of water quality in five different waters,the difference between different waters was analyzed using the spectral similarity method,and the main pollution spectral bands were found through factor analysis.Finally,a pollution source monitoring experiment was carried out by establishing a remote monitoring system and factor analysis model.Compared with traditional monitoring methods,the in-situ immersion real-time online water quality monitoring work carried out in this paper has the advantages of real-time,high efficiency,high integration,no chemical reagents and no secondary pollution.The remote transmission system improves the data transmission efficiency,Which improves data processing capabilities.The established multivariate statistical analysis model and spectral likelihood model provide an effective method for Pollution analysis.In summary,this paper has carried out research on the multi-parameter remote data acquisition system of ultraviolet spectroscopy and water quality.Through the long-term monitoring of the artificial lake,it has been verified that the system works stably and has comprehensive information.It is expected to play a greater role in the monitoring and management of surface water quality in the future.