测控电路课程设计

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1、测控电路课程设计题目：PT100温度变送器设计学院：物理与信息工程学院专业：测控技术与仪器班号：B10072021姓名：李沙学号：201007202118一、实验要求：设计一个用热电阻Pt100制作的温度变送器，要求其温度变化范围为0℃-400℃,输出为0.3V-1.5V,精度为5％，在此基础上构成一个输出为4mA-20mA的电流源。二，实验原理图三，实验材料芯片LM324（内含4个放大器）一个，4个10K的电阻，6个100K的电阻，2个200K的电阻，3个滑动变阻器（502,401,201各一个）四，

2、实验步骤1.将PT100调至100Ω接入电路，分别测Uo1和Uo2,调滑动变阻器104和502，使其电压均接近于1V,并且Uo1>Uo2。对电路信号放大部分先进行调零：测Uo的值并调节502，是输出为0.3V,再对电路信号放大部分进行调满：先将PT100调至247Ω接入电路,再测Uo的值并调节104，使输出为1.5V。如此反复对该电路进行调零和调满的操作，使其输出稳定在0.3V-1.5V之间即可。2.测实验数据：调节PT100的阻值，使其以每隔50℃的阻值接入电路，再测输出Uo的值，电流源电路接好后，开

3、始测电流的输出。测量时应按PT100的阻值增大时测一次，再依次减小其阻值测一次。五，准备材料1，热电阻pt100de分度表温度℃0123456789电阻值（Ω）010203040100.00103.90107.79111.67115.54100.39104.29108.18112.06115.93100.78104.68108.57112.45116.31101.17105.07108.96112.83116.70101.56105.46109.35113.22117.08101.95105.85109

4、.73113.61117.47102.34106.24110.12114.00117.86102.73106.63110.51114.38118.24103.12107.02110.90114.77118.63103.51107.40111.29115.15119.015060708090119.40123.24127.08130.90134.71119.78123.63127.46131.28135.09120.17124.01127.84131.66135.47120.55124.39128.221

5、32.04135.85120.94124.78128.61132.42136.23121.32125.16128.99132.80136.61121.71125.54129.37133.18136.99122.09125.93129.75133.57137.37122.47126.31130.13133.95137.75122.86126.69130.52134.33138.13100110120130140138.51142.29146.07149.83153.58138.88142.67146.44

6、150.21153.96139.26143.05146.82150.58154.33139.64143.43147.20150.96154.71140.02143.80147.57151.33155.08140.40144.18147.95151.71155.46140.78144.56148.33152.08155.83141.16144.94148.70152.46156.20141.54145.31149.08152.83156.58141.91145.69149.46153.21156.9515

7、0160170180190157.33161.05164.77168.48172.17157.70161.43165.14168.85172.54158.07161.80165.51169.22172.91158.45162.17165.89169.59173.28158.82162.54166.26169.96173.65159.19162.91166.63170.33174.02159.56163.29167.00170.70174.38159.94163.66167.37171.07174.751

8、60.31164.03167.74171.43175.12160.68164.40168.11171.80175.49200210220230240175.86179.53183.19186.84190.47176.22179.89183.55187.20190.84176.59180.26183.92187.56191.20176.96180.63184.28187.93191.56177.33180.99184.65188.29191.