摘要
介绍了基于干化学法的尿液分析仪研制以及系统组成,并对系统误差进行了分析。分析仪利用红、绿、蓝LED灯作为光源对不同的试纸块进行照射,利用光电池和信号调理电路将反射光转换为相对应的电压信号,输出信号与分析仪预存的阈值比较得出检验结果。利用STM32F103ZET6作为分析仪的控制单元,通过D/A转换器输出直流电压作为信号调理电路的直流偏置电压,以补偿环境光和元件所产生的误差。理论分析与实验数据表明,该补偿方式取得了较好的效果。
A urine analyzer based on dry chemistry method is developed, the composition of the system is described, and the systematic error is analyzed. The analyzer uses red, green, and blue LED lamps as the light source for the type of test strip block, and converts the reflection light into corresponding voltage signal by using light batteries and signal conditioning circuitry. The output signal is compared with preset threshold value in the analyzer to yield test results. STM32F103ZET6 is used as the control unit, and the DC output voltage from the D/A converter as the DC bias voltage for the conditioning circuit, so as to compensate for ambient light components errors. Theoretical analysis and experimental data show that the compensation achieved good results.
出处
《电子科技》
2013年第10期47-49,52,共4页
Electronic Science and Technology
