摘要
针对普通测温方法存在测温误差大、精确度低等缺陷,分析了铂电阻Pt100温度传感器的非线性,研究了线性化测温的实现方法,并设计了采用低温漂恒流源式非线性补偿的电路和温度测量的方案。试验证明,该测量方法可使测量精度提高到±0.06 K;且该方案所采用的电路简洁,具有测量精度高和可靠性高的特点,可在温度的精确测量中得到广泛应用。
Aiming at the disadvantages of ordinary temperature measurement methods,i.e.,low accuracy and large temperature error,the non-linearity of Pt100 resistance sensor is analyzed,and the implementing method of linear temperature measurement is studied.The measurement strategy by adopting low temperature drift constant current source and nonlinear compensation circuit is designed.The tests verify that the measurement method enhances the accuracy to ±0.06 K,and the circuit proposed is simple and reliable,it can be widely used in precise temperature measurement.
出处
《自动化仪表》
CAS
北大核心
2011年第11期84-86,共3页
Process Automation Instrumentation
关键词
温度传感器
恒流源
线性校正
仪表
放大器
非线性
微处理器
Temperature sensor Constant current source Linear correction Instrumentation Amplifier Non-linearity Microprocessor
