摘要
介绍了一种应用铂电阻进行高准确度测温的方法。24位的Σ-Δ型A/D转换器AD7714的应用保证了0.001℃的测量分辨力,温度的采集采用了极其简洁的铂电阻平衡桥电路,测量软件中的对分搜索查表法使铂电阻测温不再存在T/R转换的非线性误差,用软件方法进行了测量值的零点和满幅的调准,使测量误差在全量程小于0.02℃。
A method of proceeding high accuracy temperature measurement with platinum resistor is introduced. A resolution of 0.001#℃is guaranteed through the application of 24 bits Σ-Δ#A/D converter AD7714. A very simple balanced bridge of platinum resistor is used in the temperature sampling. Because the bisection searching method in the measuring software is used,there is no nonlinear error of T/R converting on the temperature measuring with platinum resistor. A full scale error of no more than 0.02#℃ is reached through calibrating the offset and gained with software.
出处
《传感器技术》
CSCD
北大核心
2003年第11期69-71,共3页
Journal of Transducer Technology
关键词
铂电阻
温度测量
准确度
查表线性化
软件校准
A/D转换器
platinum resistor
temperature measurement
accuracy
check form method linearity
adjusting in software
