铂电阻温度传感器实现线性测温方案的研究

Process Automation Instrumentation(2011)

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Abstract
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。
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Key words
Temperature sensor Constant current source Linear correction Instrumentation Amplifier Non-linearity Microprocessor
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