The Design And Experimental Analysis Of Yield Monitor Device Of Tomato Harvester

Xinjiang is largest production base for processing tomato in China, and one of the main producing regions for tomato sauce in the global market. With the development of modern agriculture, the mechanization level of processing tomato industry is gradually popularized and promoted. The crucial Competitive factors for the China’s processing tomato industry in global market are the building of intellectualization, and sustainable development. Based on the production & distribution information of agriculture products, the implementation of precious agriculture is the main method to improve tomato fruit yields and quality. At present, the study in real-time monitoring of agriculture filed in China is mainly focused on the cereal crops. However, there is not relevant research in the field of production of processing tomato.In this study, using the combination of methods which are specified as following: Theoretical analysis, Computer Simulation, Experimental Design and Analysis, we do some research and investigation about Tomato harvesting machine, which include the analysis the dynamic theorem of yield monitoring devices, the improvement of key parts by modeling & design, and the investigation & selecting of the factors that affects the weighing system’s accuracy.Starting from the dynamic weighing principle and influence factors of weighing error, and by the combination of mechanical modeling, virtual design, simulation and experimental design, I modeled and design the yield monitoring devices to match it the tomato harvester for the purpose of realizing the real-time monitoring mission. The detail are as follows:(1) This part demonstrates the principle of dynamic weighing, the key dynamic factors that affects the weighing system’s accuracy. Through theoretical analysis, it is concluded that the running speed of the measuring belt, the feeding amount of the tomato(Load) and the weight collecting point are mainly responsible for the weighing precision.(2) In this part, there are demonstrations which are including: the structure characteristics and working parameters of the monitoring devices about the domestic tomato harvester; illustration of the basis about the design, modeling, and selection of the key parts; test production apparatus frame structure design; The determination about support rollers, the operating parameters and a mounting position of the weight plate; the Weighing belt and load sensor design and selection.(3) This part determined the structural strength of test devices and tomato harvester hydraulic leveling test production to meet needs. First, according to the design parameters, the measuring device for virtual assembly modeling based on SolidWorks software; ANSYS software is used to measuring the production scale frame modal analysis, judging from the effect of the excitation frequency of the tomato harvesting machine to test the structure of the industry; the tomato harvester walking adjustable leveling device for virtual modeling and imported into Adams(4) kinematics simulation, judge harvester in the ups and downs road operation, hydraulic leveling mechanism can meet the measurement device of the inclination of the requirements.(5) To design the orthogonal experiment of three factors and three levels, to find out the optimal combination of factors, I Used the optimal factor combination to adjust the belt running speed of the tomato harvester and the speed of the tomato harvesting machine, the weighing accuracy of the field verification test was achieved.