基于ARM7LPC21XX微控制器的高精度标准温度发生器  

High Precision-standard Temperature Generator Based on ARM7LPC21XX

作　　者：董慧[1] 杨景常[1] 范钧[2] 

机构地区：[1]西华大学电气信息学院,四川成都610039 [2]成都电子机械高等专科学校,四川成都610031

出　　处：《西华大学学报（自然科学版）》2009年第2期17-20,共4页Journal of Xihua University:Natural Science Edition

基　　金：四川省教育厅重点科研项目(2006-A091)

摘　　要：提出一种基于ARM7LPC21XX微控制器系列的高精度温度发生器的设计方法。它以仪器内的气体温度为被控对象，使之成为温度测试仪的温度参数校准标准；该设备以铂热电阻Pt100为温度传感器，用电阻炉丝作为加热源，并针对设备的非线形误差从软件和硬件两方面进行修正和补偿。通过实验表明，该温度发生器产生的标准温度的测量精度在0-200℃范围内可达到±0．1℃，控制精度可达±0．4℃。The paper presents a high precision-standard temperature generator based on a series of microcontroller ARMTLPC21XX, and the air temperature within the generator is the object to be controlled. So the temperature generator is regarded as the criterion of temperature calibration for the instrument of temperature-measurement. The resistance furnace is used as the heat source and the Pt 100 is employed as the temperature sensor. Because of nonlinear error of the system the software and hardware are applied to amend and compensate for it. Consequently, the temperature errors caused by the generator come up to ± 0. 1 ℃ within the range of 0℃ to 200℃ while the control errors are ±0. 4℃.

关 键 词：温度发生器 铂电阻 非线形误差 高精度 

分 类 号：TN623[电子电信—电路与系统]