一种嵌入式净水系统在线水质监测装置的研发

设计完成了一种适用于末端净水系统的嵌入式在线水质监测装置。选用280 nm波长的深紫外LED激发溶解性有机物腐殖质类荧光团产生发射波长在400 nm^500 nm范围内的荧光,将探测的荧光和散射光信号通过跨阻运放和低通滤波电路后,送入微处理器进行模数转换和数据处理。采用国际腐殖质协会自然有机物标准品配制溶液测试,结果发现监测装置的荧光信号值与溶解性有机碳浓度呈现出良好的线性关系,且具有响应快速、灵敏度高和功耗低等优点。

Development of an Online Water Quality Monitoring Device for Embedded Water Purification System

An embedded online water quality monitoring device has been developed. The 280 nm wavelength deep ultraviolet LED is used to excite the soluble organic humic fluorophore to generate fluorescence with an emission wavelength in the range of 400~500 nm. The fluorescent or scattered light signal detected by the photodiode is processed by the transimpedance amplifier circuit and the low pass filter circuit. And then convert from analog to digital. Calibrated with the Natural Organics Solutions of the International Society of Humic Substances,the fluorescence signal values of the device showed a good linear regression with the dissolved organic carbon concentration. In addition,this small fluorescence spectrometer has the characteristics of high speed,high sensitivity and low power consumption.