| 基于角度检测的拖拉机悬挂耕深电液监控系统研究 |
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| 引用本文： | 夏俊芳,李栋,刘国阳,程健,郑侃,罗承铭.基于角度检测的拖拉机悬挂耕深电液监控系统研究[J].农业机械学报,2021,52(8):386-395. |
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| 作者姓名： | 夏俊芳 李栋 刘国阳 程健 郑侃 罗承铭 |
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| 作者单位： | 华中农业大学 |
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| 基金项目： | 公益性行业（农业）科研专项（201503136）和国家重点研发计划项目（2017YFD0301303） |
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| 摘 要： | 针对长江中下游农业区土壤黏重潮湿、机具碾压导致地表平整度差、耕作时耕深不稳定等问题，提出了一种基于拖拉机车身俯仰角与悬挂装置提升臂转角的耕深监控方法。首先，对旋耕作业机组姿态进行分析，确定了耕深与角度之间的几何关系，建立了耕深控制模型，并利用角位移传感器和倾角传感器分别测量提升臂转角和拖拉机车身俯仰角的变化，从而间接确定耕深;然后设计了耕深电液监控系统，该系统可预设耕深和实时显示耕深;最后，选用Simulink软件通过仿真对耕深电液监控系统进行响应速度检验，仿真结果显示，系统能在0.6s达到稳定状态，满足耕深控制要求。进行了耕深自动监控系统准确性试验，结果表明，系统能检测因倾仰导致的三点悬挂下拉杆悬挂点高度的变化量，调控高度稳定在设定值，验证了系统的准确性。为检验耕深电液监控系统田间作业性能，选择所设计的电液监控系统与原机械调节系统进行了对比试验，结果表明，利用电液监控系统进行旋耕作业时，其在各工况中耕深稳定性变异系数不超过4.28%，耕深标准差和耕深稳定性变异系数均低于机械调节系统。
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| 关 键 词： | 拖拉机 电控液压系统 监控 耕深稳定性 倾角传感器 |
| 收稿时间： | 2020/9/19 0:00:00 |
Design and Test of Electro-hydraulic Monitoring Device for Hitch Tillage Depth Based on Measurement of Tractor Pitch Angle |
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| XIA Junfang,LI Dong,LIU Guoyang,CHENG Jian,ZHENG Kan,LUO Chengming.Design and Test of Electro-hydraulic Monitoring Device for Hitch Tillage Depth Based on Measurement of Tractor Pitch Angle[J].Transactions of the Chinese Society of Agricultural Machinery,2021,52(8):386-395. |
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| Authors: | XIA Junfang LI Dong LIU Guoyang CHENG Jian ZHENG Kan LUO Chengming |
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| Institution: | Huazhong Agricultural University |
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| Abstract: | Aiming at the problems of heavy and wet soil in agricultural areas in the middle and lower reaches of the Yangtze River, poor surface flatness due to machine rolling, and unstable tillage depth during farming. Firstly, the posture of the rotary tillage operation unit was analyzed, the geometric relationship between tillage depth and angle was determined, and the tillage depth control model was established. The angle displacement sensor and the tilt angle sensor were used to measure the rotation angle of the lift arm and the pitch angle of the tractor body to indirectly determine the tillage depth. Secondly, an electro-hydraulic monitoring system was designed, which can realize preset tillage depth value and display real-time tillage depth. Finally, Simulink software simulation was used to test the response speed of the tillage electro-hydraulic monitoring system. The simulation results showed that the system can reach a stable state in 0.6s and meet the tillage depth control requirements. In the field test stage, the accuracy test of the automatic tillage depth detection system was adopted, and the test result was obtained that the system which can detect the change in the height value of the three-point suspension drop-bar suspension point caused by the tilt, and the control height was stable at the set value. The performance of the automatic detection system for tillage depth was verified. In order to test the field operation performance of tillage depth electro-hydraulic monitoring device, the designed electro-hydraulic monitoring system and the original mechanical control system were selected for comparison tests. The results showed that when the electro-hydraulic monitoring system was used for rotary tillage operations, the value of the variation coefficient of tillage depth stability was 4.28% under each working condition at most. The standard deviation of tillage depth and the coefficient of variation of tillage depth stability were both lower than that of the mechanical control system. It was verified that the electro-hydraulic monitoring system improved the stability of tillage depth and can achieve a good stable tillage effect. |
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| Keywords: | tractor electronically controlled hydraulic system monitor stability of tillage depth tilt sensor |
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