生化分析仪数据采集系统的设计  

Design of the biochemical analyzer data acquisition system

作　　者：李新[1] 杨勇[1] 

机构地区：[1]沈阳工业大学

出　　处：《电子设计工程》2016年第20期113-117,共5页Electronic Design Engineering

摘　　要：针对生化分析仪数据采集电路庞杂与计算繁琐等问题,提出了多路自动增益控制光电转化电路,并给出具体的分析与计算。在此系统中可变增益互导放大器在光学系统中实现最大的动态测量范围,利用多路复用开关精简电路结构并实现12路信号统一滤波和放大。经过滤波和放大的电压信号通过集成高精度ADC的高性能处理器进行处理和传输,提高的采集系统的集成度与稳定性。通过对测试数据的处理和分析,光度计的吸光度线性范围,准确性、稳定性与重复性满足行业标准。In view of the biochemical analyzer data acquisition circuit was so large and the calculation of the system was confused, the multiplex automatic gain control photoelectric conversion circuit was put forward, detailed analysis and calculation was given. In this system, programmable-gain transimpedance amplifiers maximized dynamic range, multiplex switch was used to simplify circuit structure and realizese the unity of No.12 signal filtering and amplification. The voltage signal that was filtered and amplified was processed and transmited though high-performance processor integrated high precision ADC. It was to improve the acquisition system integrity and stability.Through the test data processing and analysis, the photometric absorbance linear range, accuracy, stability and repeatability are meet industry standards.

关 键 词：生化分析仪 光电比色计 互导放大器 自动增益控制 

分 类 号：TN29[电子电信—物理电子学]