摘要
为了提高热电阻温度测量的精度,从温度传感器的选型、测量方案的设计、实际测量电路、硬件自校正、微处理器的选择、模拟信号预处理、滤波算法和软件非线性校正等方面给出了具体的设计方案。详细分析了自校正补偿及微信号采集转换电路的设计方案,设计了与DSP F2812的接口电路。实际应用表明,通过上述改进方案,热电阻温度测量准确度可以达到10 ppm的设计要求。
To improve the precision of thermal resistance temperature measurement, the specific solutions are proposed from the selection of thermal resistance thermometer, the design of measurement scheme, the measuring circuit, hardware self-compensating, the choice of microprocessor, pretreatment of analog signal, filtering algorithm and software nonlinear correction. The principles of self-tuning compensation and signal acquisition and conversion circuit are analyzed in detail, and the interface circuit with DSP TMS320F2812 is designed. The practical application shows that by the above improvement program, the precision of thermal resistance temperature measurement can reach the design demand of 10 ppm.
出处
《测控技术》
CSCD
北大核心
2014年第8期145-147,152,共4页
Measurement & Control Technology
关键词
热电阻
温度测量
自补偿
转换开关
滤波算法
非线性校正
thermal resistance
temperature measurement
self-compensating
changer
filtering algorithm
nonlinear correction
