中文摘要
摘
要
本论文要做的课题是基于虚拟仪器的加热炉温控系统设计，要求加热炉温度稳定在80℃，允许有±1℃的误差。本论文采用美国NI公司虚拟仪器开发软件LabVIEW85开发出一套低温电加热炉温度控制系统。系统具体设计方案如下：由传感器测得的炉温信号经过变送环节送给数据采集卡，采集卡对信号进行AD转换后传输至虚拟仪器，虚拟仪器中的PID算法对信号处理后产生控制信号，再经过采集卡DA转换后输出控制PWM波产生电路，改变PWM波占空比，产生的PWM波经过光耦MOC3041控制双向可控硅的通断，以此改变加在电阻上的电压，达到温控目的。本论文首先按照上述设计方案设计了硬件电路，接着进行系统软件的设计。经过简单的实验，系统可以正常采集数据并显示。关键词：虚拟仪器，LabVIEW，温控系统，过零调功，PWM
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fAbstract
Abstract
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f目录
目录
摘要
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ABSTRACT英文摘要Ⅱ目录Ⅲ第一章绪论11课题的研究的目的和意义r