类磁栅液压缸位移传感器工作机理及仿真分析

Working Mechanism and Simulation Analysis of Displacement Sensor for Magnetic-like Cylinder

由于类磁栅液压缸位移传感器在定量分析困难及测量精度不高等方面的不足,使其独特的结构优势无法得到充分发挥。在充分分析其结构的基础上,利用电磁场相关理论,采用分子电流假说建立了永磁体数学模型,通过Ansoft Maxwell软件对所求模型进行仿真并验证了所求模型的准确性。详细介绍两种磁敏感元件的工作原理和响应模型,依托对敏感元件响应模型本身及工作过程仿真数据的分析,得到霍尔元件更适合作为传感器的敏感元件及类磁栅液压缸位移传感器的测量精度与永磁体表面形状等几何尺寸密切相关等结论,为该传感器高精度测量提供理论支撑。

Due to the difficulty of quantitative analysis and poor measurement accuracy,the unique structural advantages of the magnetic like cylinder displacement sensor can not be fully exploited.In order to solve the problem of low detection accuracy effectively for the sensor,on the basis of analyzing the structure based on the electromagnetic field theory,we establish a mathematical model for the permanent magnet by the molecular current hypothesis.The model is simulated by the software Ansoft Maxwell and the accuracy of the model is verified.Then,the working principle and response model of the two kinds of magnetic sensors are introduced in detail.By the analysis of the sensor model itself and the simulation data of the working process,the Hall element is more suitable as the sensitive element of the sensor.The measurement accuracy of the magnetic like cylinder displacement sensor is closely related to the geometrical shape of the permanent magnet surface,which provides a theoretical support for the high precision measurement of the sensor.