PB06210385杨迪电阻应变式传感器灵敏度特性的研究实验目的：见预习报告实验原理：见预习报告实验内容：一实验步骤：1．接线测量单臂电桥的电压灵敏度2．接线测量半桥电路的电压灵敏度3．接线测量全桥电路的电压灵敏度二数据处理一、单臂电桥砝码(g)020406080100120140160180200电压(V)上升00.0140.0270.040.0530.0670.080.0920.1050.1190.132电压(V)下降0.0020.0160.0280.0410.0540.0670.080.0930.1060.1190.132V平均0.0010.0150.02750.04050.05350.0670.080.09250.10550.1190.132Vi+5-Vi0.0660.0650.0650.0650.06550.0650501001502000.000.020.040.060.080.100.120.140501001502000.000.020.040.060.080.100.120.14(V)电压(g)砝码图中红线为电压增的图像,蓝线为电压降的图像,两者略有不同。S增=0.657（V/kg）S降=0.648（V/kg）由逐差法计算得：灵敏度S=△V平均/△W=∑（Vi+5-Vi）/（5×5×0.02）=0.6525（V/kg）二、半桥电路砝码(g)020406080100120140160180200电压(V)上升00.0260.0520.0780.1050.1310.1580.1840.210.2370.263电压(V)下降0.0030.0290.0550.0810.1070.1320.1590.1850.2110.2370.263V平均0.00150.0280.05350.07950.1060.13150.15850.18450.21050.2370.263Vi+5-Vi0.130.1310.1310.1310.1310.13150501001502000.000.050.100.150.200.250.300501001502000.000.050.100.150.200.250.30(V)电压(g)砝码图中红线为电压增的图像,蓝线为电压降的图像S增=1.32（V/kg）S降=1.3（V/kg）由逐差法计算得：灵敏度S=△V平均/△W=∑（Vi+5-Vi）/（5×5×0.02）=1.309167（V/kg）三、全桥电路砝码(g)020406080100120140160180200电压(V)上升00.050.1010.1520.2030.2540.3050.3560.4070.4580.509电压(V)下降0.0010.0520.1020.1530.2030.2540.3050.3560.4070.4580.509V平均0.00050.0510.10150.15250.2030.2540.3050.3560.4070.4580.509Vi+5-Vi0.25350.2540.25450.25450.2550.2550501001502000.00.10.20.30.40.50501001502000.00.10.20.30.40.5(V)电压g砝码（）图中红线为电压增的图像,蓝线为电压降的图像由逐差法计算得：S增=2.55（V/kg）S降=2.54（V/kg）灵敏度S=△V平均/△W=∑（Vi+5-Vi）/（5×5×0.02）=2.544167（V/kg）四、比较0501001502000.00.10.20.30.40.5V电压（）g砝码（）单臂电桥半桥电路全桥电路单臂电桥S1=0.652（V/kg）半桥电路S2=1.309（V/kg）全桥电路S3=2.544（V/kg）可知S3〉S2〉S1，即全桥电路的灵敏度最高，单臂电桥的灵敏度最低...
