一种基于可编程计数阵列和最小二乘法的模数转换器  

A/D Converter Based on Programmable Count Array and Least Square Method

作　　者：王树森[1,2] 王希杰[3] 赵冬玲[2] 

机构地区：[1]重庆大学自动化学院,重庆400030 [2]济源职业技术学院信息工程系,河南济源459000 [3]安阳师范学院计算机与信息工程学院,河南安阳455000

出　　处：《化工自动化及仪表》2012年第5期626-630,共5页Control and Instruments in Chemical Industry

基　　金：河南省科技厅科技攻关项目(092102210327);河南省教育厅科学技术研究项目(2008C520005);河南省青年骨干教师资助项目(2010GGJS-258)

摘　　要：设计了一款软硬件结合的八位模数转换器。分析了脉宽调制波形的特性,研究了可编程计数阵列的工作原理,建立了系统实现的理论模型。经过理论分析和实际测试,设计了系统硬件电路。对硬件系统进行了抽样测试,并将抽样数据与理论值进行对比研究。采用最小二乘法对抽样数据进行拟合,对拟合结果进行对比分析研究,建立了优化的模数转换数学模型。在Keilv4平台上,设计了模数转换的软件系统。在某钢化玻璃加热炉上得到应用,系统工作稳定可靠。The 8-bit A/D converter which boasting of hardware and software combination was designed;the PWM characteristics and the working principle of programmable count array were analyzed to establish system’s theory model;basing on theoretical analysis and actual testing,the system hardware circuit was designed;hardware system was sampled to compare with the theoretical value.By using least square method,sampling data were fit and analyzed to establish an optimized mathematical model and to design the software system in Keilv4 platform for this A/D converter.Application in a toughened glass furnace proves the stability and reliability of the system.

关 键 词：模数转换 脉宽调制 可编程计数阵列 最小二乘法 数学模型 

分 类 号：TH865[机械工程—仪器科学与技术]