| China has a long history of farming civilization.In the traditional cultivation process,the amount of production and labor is large,and the labor intensity of personnel is high.Therefore,agricultural mechanization is the only way for agricultural development.For a long time,due to the high energy consumption of tillage machinery,the cost performance of the tillage operation has been greatly reduced.The large mechanical resistance of soil is the most important factor affecting high energy consumption.Therefore,it is important to study the method of collecting tillage resistance,which is related to the study of farming tool design and soil-cultivation and crop-crop.This paper designed a farming resistance collection system,using two kinds of basic farming machines,namely plow and rotary tiller,as testing equipment,in Zengcheng District of Guangzhou City,Guangdong Province,Daowai District of Harbin City,Heilongjiang Province,Datong Lake District of Yiyang City,Hunan Province and Jiujiang City of Jiangxi Province.Tillage resistance collection experiments and data analysis studies were carried out in four different areas of Chang County.The main research contents include:1.A farming resistance collection system based on the three-pin summing force measurement method and attitude correction was designed.Three shaft pin sensors were used to measure the farming tool resistance.The GNSS(Global Navigation Satellite System)system was used to measure the pitch angle of agricultural implements.The soil resistance was corrected and the field test was carried out after laboratory calibration.The results showed that the traction resistance error measured by the tillage resistance acquisition system was 6.0%,compared with the no-angle correction.The error of the three-pin summing force measurement method is reduced by 4%,which indicates that the farming resistance collection system uses the dual-antenna GNSS system to measure the pitch angle of the agricultural implement and correct the resistance,which improves the measurement accuracy.2.A GNSS-based method for measuring the depth of tillage is proposed.The field comparison test is carried out with the conventional manual surveying method.The results show that the average error of the GNSS tillage measurement method compared with the manual measurement is 2.7%,and the measured data volume is obviously The manual sampling method shows that the GNSS ploughing depth measurement method is feasible and the measurement accuracy is high.3.Based on the depth of tillage,one-way analysis of variance was carried out on the main tillage resistance of ploughing and rotary tillage.The results showed that the tillage depth had a significant effect on the traction resistance of the ploughing,and the traction resistance increased with the increase of the tillage depth.There is a significant influence on the traction resistance of rotary tillage.The traction resistance decreases slightly with the increase of tillage depth.The depth of tillage has a significant effect on the torque resistance of rotary tillage,and the torque resistance increases with the increase of tillage depth.4.The regression analysis of the rotational tillage torque and the traction resistance shows that the rotational tillage torque has a negative correlation with the traction resistance,mainly because the driving force generated by the contact between the rotary cutter and the soil increases with the increase of the torque,thereby increasing The forward thrust of the rotary tiller reduces the traction of the loaded tractor.5.Through data statistics and calculations,the power consumption per unit area of ploughing and rotary tillage was compared.The results showed that the power consumption per unit area of ploughing was less than that of rotary tillage,and the average power ratio of ploughing and rotary tillage was 27.5%.By comparing the rotational tillage power,torque power and total power,the rotary tilling power consumption only accounts for a small part of the total power consumption,with an average of 19.5%,and the torque power consumption accounts for a large proportion.6.Through the regression analysis of compaction and main tillage resistance of ploughing and rotary tillage,the results showed that there was a significant positive correlation between compaction and main tillage resistance of ploughing and rotary tillage.The main tillage resistance of ploughing and rotary tillage The increase in the degree ofcompaction increases. |
