摘要
介绍了基于PT100型铂热电阻的测温装置的软硬件设计,并进行了实验验证。该装置采用惠斯通电桥电路采集PT100型铂热电阻的阻值,并将其转换为电压差值;PIC单片机采用分段线性方式将电压差值转换为温度值。实验结果表明,该测温装置测量精度高,误差小,可以快速、准确地测量预埋入PT100型铂热电阻的大型动力设备的内部温度。
The paper introduced designs of hardware and software of a temperature measuring device based on PT100 platinum thermistor,and gave experimental verification.The device uses Wheatstone bridge circuit to collect resistance of PT100 platinum thermistor,and converts the resistance to voltage difference.PIC microcontroller converts the voltage difference to temperature using piecewise linear method.The experimental result showed that the temperature measuring device has high measuring accuracy and small error,and can measure internal temperature of large power equipment with PT100 platinum thermistor quickly and accurately.
出处
《工矿自动化》
北大核心
2012年第3期89-91,共3页
Journal Of Mine Automation
关键词
热电阻测温
PT100
铂热电阻
惠斯通电桥
分段线性方式
PIC单片机
RTD temperature measurement； PT100； platinum thermistor； Wheatstone bridge； piecewise linear method； PIC microcontroller
