大功率拖拉机电液提升专用力传感器磁路设计与仿真

发布时间：2018-04-11 08:55

本文选题：力传感器 + 大马力拖拉机　；参考：《农业机械学报》2017年08期

【摘要】：基于压磁效应原理,对大马力拖拉机电液提升控制专用力传感器的磁路结构进行了研究。分析了该力传感器的工况和现有柱状磁芯型力传感器的磁路工作原理,并针对其不足提出了一种十字芯型的力传感器磁路结构方案,将现有柱状磁芯型力传感器产品的受力维度从二维变为三维,在同等受力变形的基础上增大了磁路结构的变形程度,增加了磁场的偏置程度,提高了传感器的灵敏度与线性度。建立了磁结构的三维模型与磁路数学模型,并基于Matlab/Simulink模块分别建立了柱状磁芯型与十字芯型2种力传感器的系统仿真模型。结果表明,与柱状磁芯型力传感器相比,十字芯型力传感器线性度由1.85%降低为0.08%,灵敏度由0.09 mV/kN提高为0.21 mV/kN,适用于重载荷作用下电液提升系统中力的测量与控制,能够更好地适应恶劣的工作环境,提升拖拉机的耕作效果。
[Abstract]:Based on the principle of piezomagnetic effect, the magnetic circuit structure of the special force sensor for electro hydraulic lifting control of high horsepower tractor is studied.The working conditions of the force sensor and the magnetic circuit working principle of the existing cylindrical core force sensor are analyzed, and a magnetic circuit structure scheme of the cross core force sensor is put forward in view of its shortcomings.Three dimensional model of magnetic structure and mathematical model of magnetic circuit are established, and the system simulation models of cylindrical core type and cross core type force sensor are established based on Matlab/Simulink module.The results show that the linearity of the cross core force sensor is reduced from 1.85% to 0.08%, and the sensitivity is increased from 0.09 mV/kN to 0.21 MV / KN, which is suitable for the measurement and control of the force in the electro-hydraulic lifting system under heavy load.Can better adapt to the harsh working environment, improve the tractor farming effect.
【作者单位】：山东科技大学机械电子工程学院;山东五征集团;山东科技大学交通学院;山东海卓电液控制工程技术研究院;
【基金】：国家发改委增强制造业核心竞争力重点领域关键技术产业化专项资金项目(1511010015)
【分类号】：S219;TP212

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