介绍了一种二氧化硅浓度自动分析仪的设计方法。采用自校正的方法,在线修正由于环境温度的变化引起的光电池输出信号的零点和斜率的漂移;用多项式拟合方程表示光电池输出信号与二氧化硅浓度的非线性关系。该自动分析系统以80C196KC单片机为核心,能对使用水进行自动采样、自动分析,并能显示、打印分析结果,同时兼具样水温度、化学试剂量、光源电池电压和二氧化硅浓度超限报警功能 A method for designing an automatic analyzer of silica concentration is introduced. The self-calibration method was used to correct the drift of the zero point and slope of the photocell output signal caused by the change of ambient temperature on-line. The polynomial fitting equation was used to express the nonlinear relationship between photocell output signal and the concentration of silica. The automatic analysis system to 80C196KC microcontroller as the core, the use of water can automatically sample, automatic analysis, and can display and print the results of the analysis, both the sample temperature, the amount of chemical reagents, light source battery voltage and silica concentration limit Alarm function