【作者】 马青；

【导师】 史金飞；

【作者基本信息】 东南大学 ， 机械电子工程， 2004， 硕士

【摘要】 位移测量具有广泛应用,电感式传感器以其结构简单可靠、输出功率大、线性好、抗干扰和稳定性好、价格低廉等特点获得了大量的应用。针对目前电感式位移传感器的应用现状,在对电感式直线位移传感器深入分析的基础上,本文提出了一种新型结构的电感式角位移传感器。本文首先对电感式直线位移传感器的各种形式进行了对比,对螺管型传感器的结构、特性进行了重点讨论,并用有限元软件对论文设计的电感式直线位移传感器进行了磁场分析,获得了传感器线圈螺管内的磁通量线图及螺管轴线上的磁场分布曲线。在此基础上,设计了一种新结构的电感式角位移传感器,利用磁芯的特殊形状,使线圈的电感变化与磁芯旋转角度成比例。针对角位移传感器的结构及工作特点,采用有限元软件ANSYS对其磁场进行了分析,得到磁芯不同转角时线圈螺管内的磁通图、磁场分布曲线及传感器输出特性曲线,同时分析了传感器结构参数对性能的影响。结果表明在一定范围内,传感器的输出与磁芯转角成正比,螺管内的空气隙越小传感器的灵敏度越高。本文还设计了相应的电感式传感器的测量电路。其中,自感式传感器的测量电路主要有正弦波发生及放大、交流电桥、减法电路、相敏检波和低通滤波部分,互感式传感器的测量电路有正弦波发生及放大、减法电路、差动整流和低通滤波部分。最后给出了螺管型角位移传感器三个样品的标定实验数据,得到了传感器的特性指标。传感器的线性范围超过±50o时,线性度小于±0.41%,线性范围超过±60o时,线性度小于±1.9%。更多还原

【Abstract】 The measurement of displacement is very important in engineering. Inductive displacement transducers are widely used due to their simple structures, high output capacities, good linearity, good disturbance resistance, good stability and low prices. Based on thoroughly analysis of linear inductive displacement transducers, a new inductive angular displacement transducer were designed in this thesis.A comparative study of varies inductive transducer structures was conducted in this thesis, with the coil type inductive transducers were emphasized. The FEM was used to analyze the magnetic fields in the coils of this type of inductive transducers. Based on above analysis, a new structure of inductive angular displacement transducer was designed, in which the mutual inductance changes proportional with the rotation angle of the core. The commercialized FEM software ANASYS was employed in the analysis of the magnetic field in the transducer. The distribution maps of the magnetic field and the output specification curves were obtained by the FEM analysis. The affections of the structure parameters to the output specifications were also studied. It was found that in a specific range, the mutual induction changes linearly with the angular displacement It was also concluded that the smaller the structure gap, the bigger the transducer output.The correspondent amplifier circuits were also discussed in this thesis. Three type of practical circuits were given.Finally, the calibration data of three experimental angular displacement transducers were given, which shows that the linear range is no less than +/- 50 degrees with linearity error less than 0.41%. When a bigger linearity error, namely 1.9%, is acceptable, the linear range will exceed +/- 60 degrees accordingly.更多还原