一种高精度光谱信号采集系统的设计及应用

Design and application of a high precision spectroscopy signal acquisition system

介绍一种高精度光谱信号采集系统的设计方法及其在连续分光式生化分析仪中的应用。系统以基于ARM技术的S3C2440为控制核心,采用基于数字电位器的柔性增益放大电路设计技术,并选用16位高分辨率A/D对光谱信号进行数据采集,实现了生化分析仪吸光度准确度偏差不大于0.01Abs的性能指标。生化分析仪的临床应用表明,系统具有运行稳定、抗干扰能力强和精度高等优点。

The design method and clinical application in a continuous spectral type of biochemical analyzer of a high precision spectroscopy signal data acquisition system is introduced.The system using S3C2440 which based on ARM technoligy as control core,combineing flexible gain amplification circuit design techniques which based on the digital potentiometer and choosing 16 bit high resolution A/D to acquisite spectroscopy signal,has realized the performance indicators of no more than 0.01 Abs in absorbance accuracy deviation of biochemical analyzer.The clinical application of the biochemical analyzer shows that the system has a series of merits,such as stable operation,anti-jamming ability,high precision and so on.