农业机械学报2023，Vol.54Issue(z1)：411-418,8.DOI:10.6041/j.issn.1000-1298.2023.S1.044
基于印制绕组的电磁式自供电拖拉机轮速传感器研究
Design of Electromagnetic Self-powered Tractor Wheel Speed Sensor Based on Printed Winding
摘要
Abstract
To solve the problem that the traditional power supply methods were difficult to adapt to the needs of modern agricultural sensor networks,an electromagnetic self-powered tractor wheel speed sensor based on printed winding and Halbach array was designed.The device adopted the structural form of an intermediate stator and two rotors on both sides.Based on Faraday's electromagnetic induction law,the output induced electromotive force of the device was theoretically derived and its influence parameters were determined.By using finite element simulation software,the magnet arrangement,coil turns and air gap which affected the output performance of the device were simulated and analyzed,and the best parameters of stator coil shape and permanent magnets pole number were determined.The back-end circuit was designed,which can rectify,measure and transmit the output voltage of the device,so as to calculate the speed,and can be directly supplied by the device.The prototype of the device was made,and the bench calibration test and actual vehicle application test were carried out respectively.The results showed that the linear fitting results of the device speed and voltage were good,the R2 was 0.999 91,and the rectified DC voltage at 400 r/min was about 3.16 V,which can meet the demand of supplying power to the back-end circuit.Compared with the commercial encoder,the measurement accuracy of the speed in the bench test was kept within 1％,and the accuracy in the actual vehicle test was basically kept within 5％.It can meet the requirements of actual use.关键词
拖拉机/轮速传感器/自驱动/印制电路板绕组/Halbach阵列Key words
tractor/wheel speed sensor/self-driven/PCB winding/Halbach array分类
农业科技引用本文复制引用
李思语,李臻,何志祝,傅梁起,王亚东,才胜..基于印制绕组的电磁式自供电拖拉机轮速传感器研究[J].农业机械学报,2023,54(z1):411-418,8.基金项目
国家重点研发计划项目(2022YFD2000300)、国家自然科学基金项目(52175259)和拼多多-中国农业大学研究基金项目(PC2023B01005) （2022YFD2000300）
