便携式快速热分析仪的设计与实现  

Design and Implementation of Portable Rapid Thermal Analyzer

作　　者：周怡君[1] 戴挺[2] 王明君[1] 

机构地区：[1]东南大学机械工程学院,江苏南京211189 [2]东南大学材料科学与工程学院,江苏南京211189

出　　处：《仪表技术与传感器》2014年第4期31-33,87,共4页Instrument Technique and Sensor

摘　　要：提出了一种基于MC9S12XS128微控制器的便携式快速热分析仪设计方案;硬件部分采用AD595组成了热电偶信号放大、冷端补偿和故障报警的调理电路,并采用高精度14位AD7367实现了数据采集;软件部分提供了基于定时器事件驱动状态机转移的测试流程,并提出了拐点与平台特征值相结合确定TL、TS的算法;最后通过实例,验证了系统完全能满足铸铁炉前快速成分分析的需要。This paper presented a design for a portable rapid thermal analyzer based on MC9S12XS128 microcontroller, The thermal analyzer employd an adjustment circuit using the AD595 to achieve thermocouple signal amplification, cold injection com pensation, and fault alarm. A high-precision 14-bit AD7367 was utilized for data acquisition. The testing procedure was based on state machine transitions driven by timer events. An algorithm based on the inflection point and/or platform eigenvalue was giyen to deteet the TL and TS. Case studies were performed to demonstrate that the proposed thermal analyzer can be effectively used for rapid component analysis.

关 键 词：热分析仪 MC9S12XS128 数据采集 测试分析算法 

分 类 号：TH832[机械工程—仪器科学与技术]