一种热分析仪器的专用气氛智能控制模块设计

Design of a Kind of Specialized Module Applied for Thermal Analysis Instruments

摘要:

吹扫气氛控制是热分析仪实验中重要的一环,气氛的稳定度是影响仪器基线性能的重要因素之一,除此外,双路气氛平稳切换是进行某些热分析专业测试的重要条件;由于国产热分析仪器大多数气氛控制装置为手动,控制精度差,操作不便,为了提高热分析仪器的智能化水平,提高气氛控制的精度,设计了一种热分析专用智能化气氛控制模块;此模块采用STM32F107VC32位芯片为核心控制MCU,通过合理设计信号采集及控制驱动电路,配合控制及数据处理软件,使原来的气氛气路切换控制以及流量控制由手动完全实现微机智能控制,控制精度、响应速度以及稳定性都大为提高;此模块已获得国家专利,并应用于DSC30热分析仪,使用效果理想。

Abstract:

Gas stability is one of the important factors influencing the performance of thermal ananlysis instrument’s baseline,and besides that,switching gas channel smothly is also a fundmental condition for professional thermal analysis testing.But currently mostly home-produced instruments with manual controlling system which had short precision,and operated inconvniently.In order to improve inteligentlized level and precision of the gas controlling system, a specilized gas control module applyied for thermal analysis instruments was designed. The module used STM32F107VC 32bit MCU as the control core, through rational design of hardware and data processing software evidently promotes precision,response time and stability.The module has already won national patent and applied for DSC30 thermal analysis instruments. 