基于ARM11的微库仑综合分析仪的研制

Design of Micro-Coulomb Analyzer Based on ARM11

利用微库仑滴定技术的测量原理设计一款基于ARM和WinCE6.0实时操作系统的嵌入式新型微库仑分析仪。硬件设计包括电解电极采集信号电路、炉温控制电路、进样器电路、积分电路、背压检测电路、串口通信电路及质量流量控制电路;软件设计包括积分起始点和终点的判定、滴定曲线绘制、峰形面积计算、样品含量计算、参数设置以及利用校准法得到样品浓度。实验结果表明,该系统具有精度高、测量速度快、小型化、一体化、智能化等优点,能够测量固体、液体、气体中的硫、氯、氮等元素的含量,对今后同类系统的研发有一定的参考价值。

Using the measuring principle of micro-coulometric titration technique,a new embedded micro-coulomb analyzer based on ARM and WinCE6.0 is designed.Hardware system includes electrode signal acquisition circuit,control circuits of furnace temperature and injector operating,integrating circuit,back-pressure detection circuit,serial communication circuit and a mass flow control circuit.Software system includes determination of integration start-point and end-point,titration curve drawing,calculations of the peak shapes area and the sample content,parameter setting and using calibration method to obtain a sample concentration.The results prove that this system has high-precision,high-speed,miniaturization,integration and intelligentization,which can measure the contents of sulphur,chlorine,nitrogen.Moreover this reasearch provides great reference value for the development of similar systems.