在线式氨含量监测仪的研制

Development of on-line Instrument of Monitoring and Measuring Ammonia Content

本文根据系统的功能要求,提出了系统的硬件结构组成和软件实现流程。对高阻抗毫伏级信号放大器的设计进行了深入的研究并设计了应用电路。对具有指数特性关系的NH3电极,采用软、硬件相结合的技术提高系统的测量精度。使用C51高级语言和MCS51汇编语言相结合技术,实现浮点数的运算和实时控制。提出对具有指数特性的电化学传感器的快速校正算法。

s: The hardware structure and software flow of system is brought forward based on its function requirements. The design of milli-voltage level amplifier with high impedance is thoroughly researched and application circuit is designe d. The measurement precision of the system is raised by adopting technology of c ombining software with hardware for ammonia electrode with index-number characte ristic. Floating-point-number calculation and real-time control are realized by applying the technology of C51 advanced language and assemble language. The fast calibrating algorithm for electrochemistry sensor with index-number characteri stic is put forward.