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为了快速准确地检测地表水、污水的化学需氧量(COD),设计了一种十字通透式结构光纤传感器,建立了一种水质COD全光谱检测系统。基于该系统,建立了COD与光谱吸光度的相关性数学模型。对配置的检测水样进行了测量,并比较哈希DR 6000多参数水质检测仪对相同水样测量得到的数据,可以发现,所构建的系统与哈希DR 6000多参数水质检测仪测量COD的示值误差小于3%,能较好的适用于水质COD实时在线检测。
In order to detect the chemical oxygen demand (COD) of surface water and sewage rapidly and accurately, a cross-permeable optical fiber sensor was designed and a water quality COD detection system was established. Based on this system, a mathematical model of correlation between COD and spectral absorbance was established. The configuration of the test water samples were measured and compared Hach DR 6000 multi-parameter water quality measurement of the same water samples obtained data can be found, the system built and Hach DR 6000 multi-parameter water quality measurement of COD Indication error is less than 3%, can be better applied to water quality COD real-time online testing.