TANG Yong, CHENG Ming-xiao, CHU Qin. Data acquisition and processing of the zirconia analyzer based on Nios Ⅱ[J]. 2010, 29(4): 105-107. DOI: 10.13873/j.1000-97872010.04.036.
基于NiosⅡ的ZrO2分析仪的数据采集与处理
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。
Abstract
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 Nernst 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.