为满足环境监测预警体系建设的需求,系统集成嵌入式技术、全光谱检测技术、电子舌检测技术,研制了基于物联网和光电子技术的环境自 动检测系统,实现对pH、电导率、氨氮、浊度、色度、COD的在线检测。经实验验证系统性能良好, pH、电导率、氨氮、浊度和COD的测量精度分别为-0.02, 0.4%, 2.9%, 2.1%, 1.1%; 电导率、浊度和COD的测量检出限分别为0.7 μS/cm, 0.9 NTU, 0.5 mg/L。实际水样比对测试符合要求,可满足水质在线快速监测的需求。

To meet the construction requirements of environmental monitoring and early-warning system, the environmental automatic testing system which based on the internet of things and optoelectronic technology was designed. Combined embedded technology, full-spectrum detection technology and e-tongue inspection technology, the online testing on a number of water quality parameters, such as pH, conductivity, ammonia nitrogen, turbidity, chroma and COD, et al. could be implemented successfully. This system could evaluate the change of water quality. According to the performance of the system verified by series experiments, the accuracies of pH, conductivity, ammonia nitrogen, turbidity and COD measurement were -0.02, 0.4%, 2.9%, 2.1%, 1.1%, respectively. The detection limits of conductivity, turbidity and COD measurement were 0.7 μS/cm, 0.9 NTU and 0.5 mg/L, respectively. The results of the actual water samples for comparison between the system and standard methods were acceptable. The consequence could satisfy the demand of on-line water quality monitoring.