基于NiosⅡ的ZrO_2分析仪的数据采集与处理  

Data acquisition and processing of the zirconia analyzer based on Nios Ⅱ

作　　者：唐咏[1] 程明霄[1] 储琴[1] 

机构地区：[1]南京工业大学自动化学院,江苏南京210009

出　　处：《传感器与微系统》2010年第4期105-107,共3页Transducer and Microsystem Technologies

摘　　要：基于现场可编程(逻辑)门阵列(FPGA)气体分析仪为在线实时氧含量监测仪,具有结构简单和响应快速的特点,且该ZrO2传感器符合能斯特方程特性。因FPGA浮点计算能力不强,直接用能斯特方程计算氧含量造成系统资源消耗过大,仪表不能实现快速响应。在介绍ZrO2传感器测氧原理的基础上,选择MAX197并采用NiosⅡ对测量数据进行非线性化处理,用拟合曲线替代ZrO2传感器特性方程计算氧含量,在保证仪器氧含量计算精度的同时,提高计算效率,减轻CPU的负担,快速准确地进行数据采集与处理,实现实时在线测量。Zirconia analyzer which based on field pragrammable gate array （FPGA） can monitor Oxygen content online and real-time. It has the characteristics of simple structure and fast response. The characteristics of Zirconia sensor consistent with the Nemst Equation. Due to the floating-point calculation of FPGA is not powerful, calculating Oxygen content with the Nernst Equation directly will consume a large amount of system resource. So analyzer can＇ t realize fast response. On the bas is of the introduction of the principle of Oxygen-measuring with Zirconia sensor, MAX197 is select measuremental data is non-linearly processed by using Nios II, fitting curve insteed of zirconia oxygen sensors characteristic equation, of the oxygen content is calculated by in ensuring the precision of instruments, at the same time, improve the computational efficiency, reduce the burden on CPU, acquisition and process data, fastly and accurately Realize real-time and on-line measurement.

关 键 词：氧化锆分析仪 非线性测量 数据处理 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]