CAJ | 학술논문

提出了基于四线制恒流源驱动和恒流换向技术的高精度温度测量方案，挑选性能优异的铂电阻Pt100作为温度传感器，与参考电阻串联后由恒流源驱动，然后采集信号经过调理放大，通过单片机自动校正和控制，并内嵌ITS-90国际温标计算公式，以此实现高精度温度测量。实验结果表明，该方案较好实现了消除引线电阻和非线性的影响，提高了测量精度，温度测量误差小于0．01℃，系统性能稳定。
제출료기우사선제항류원구동화항류환향기술적고정도온도측량방안，도선성능우이적박전조Pt100작위온도전감기，여삼고전조천련후유항류원구동，연후채집신호경과조리방대，통과단편궤자동교정화공제，병내감ITS-90국제온표계산공식，이차실현고정도온도측량。실험결과표명，해방안교호실현료소제인선전조화비선성적영향，제고료측량정도，온도측량오차소우0．01℃，계통성능은정。
This paper proposed a high -precision temperature measuring scheme based on the four-wire constant-current source driver and constant current commutating technology , and selected Pt100 platinum resistor with excellent properties as temperature sensor , driven by constant current source after series connecting with a reference resistor .After being conditioning amplified , collecting signals with ITS-90 international temperature scale calculating formula were automatic calibrated and controlled by MCU in order to make high -precision temperature measurement come true .The experimental result showed that this design achieved a better result to eliminate the effects of lead resistance and nonlinear , and im-proved the measuring accuracy , the temperature measurement error is less than 0.01 ℃ and the system performance is stable .