摘要
针对铂电阻测温的特性结合虚拟仪器技术,设计了一种高精度温度测量系统;采用四线制恒流源温度测量电路克服由于铂电阻引线带来的误差,同时利用LabVIEW软件完成曲线拟合,最后对温度测量系统误差进行了分析;测试结果表明,系统具有测量精度高、可靠性高、使用灵活等特点,当被测温度范围在8℃～100℃之间,测量的绝对误差小于±0.1℃,可广泛使用于要求高精度温度测量的领域。
According to the platinum resistance temperature characteristics and virtual instruments, a high accurate temperature meas- urement system has designed. The system adopted four--wire temperature measurement, it used constant--current source to overcome the error caused by platinum resistance wire. This system used the LabVIEW software to complete curve fitting. The temperature measurement system errors have been analyzed. The experimental results showed that the system has high accuracy, high reliability and flexibility, if the measured temperature range of between 8℃ to 100℃, the absolute measurement error is less than ±0. 1℃, it can be widely applied to the high accuracy temperature measuremeht field.
出处
《计算机测量与控制》
CSCD
北大核心
2012年第4期924-925,938,共3页
Computer Measurement &Control
基金
西南石油大学校级科技基金资助(2010XJZ204)
关键词
铂电阻
曲线拟合
虚拟仪器
恒流源
platinum resistance
curve fitting
virtual instruments
constant--current source
