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交流电桥电路的电压灵敏度研究

论文编号:DZXX117  论文字数:11498,页数:28
摘要
 电桥是用于将经由传感器转换成的电阻、电容、电感等一类电路参数的变化,进一步变换成电压或电流输出的测量电路,电桥电路广泛应用于现代检测技术中。
 电桥可分为平衡电桥和非平衡电桥,非平衡电桥往往和一些传感元件配合使用。某些传感元件受外界环境(压力、温度、光强等)变化引起其内阻的变化,通过非平衡电桥可将阻值转化为电压输出,从而达到观察、测量和控制环境变化的目的,在工程测量中交流不平衡电桥已经得到了广泛的应用。在使用中,用户可以有不同组桥方式,在研究中发现,传感变换元件在电路中的位置不同, 测量结果明显不同。
 本文主要介绍了交流电桥的工作原理及在电阻、电容和电感式等传感器使用中的应用,并将根据交流不平衡电桥的不同的组桥方式,对电桥的电压灵敏度进行理论分析,并根据理论推导结果进行比较,然后用电容电桥的两种不同的接线方法做实验加以验证。
关键词:交流电桥,不平衡电桥,电压灵敏度

ABSTRACT
 Bridge is used to convert the a series of circuit parameter such as resistance, capacitance and inductance into voltage or current output of the measurement circuit, the bridge circuit is widely used in modern detection technology.
 Bridge can be divided into Balanced Bridge and Unbalanced Bridge.Unbalanced Bridge often with the use of some sensor. Some of the sensing element by the external environment (pressure, temperature, light intensity, etc.)caused by the change of its resistance changes. Resistance through the Unbalanced Bridge can be converted into a voltage output,then it can be achieved observation, measurement and control of the environmental change. Unbalanced Bridge has been widely used in the engineering survey. User can have different bridge in use,research found that exchange the location of the two sensing elemen,the result is obviously different.
 This paper introduces the operation principle of the bridge and the use of the sensor such as resistance, capacitance and inductance.We analysis the sensitivity of the a.c unbalanced bridge based on the different bridge of the a.c unbalanced bridge, and based on the theoretical results, then we will give out the method of solving the problem.
  
 Keywords: A.C Bridge, Unbalanced Bridge, Sensitivity.
目录
摘要 I
ABSTRACT II
第1章 引言 1
    1.1 背景 1
    1.2 交流电桥发展历史 1
    1.3 研究内容 2
第2章 测量电桥 3
    2.1 电桥的分类 3
    2.2交流电桥的工作原理 4
    2.3 交流电桥在传感器检测技术中的应用 7
第3章 交流电桥灵敏度 13
    3.1 交流电桥电压灵敏度的推论 13
    3.2桥臂系数的讨论 15
    3.3结论 17
    3.4电容电桥电压灵敏度的比较 17
第4章 仿真实验设计与验证 19
    4.1 Proteus软件简介 19
    4.2 实验仿真过程 19
第5章 结束语 23
致谢 24
参考文献 25
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