Query: corn harvester

title: Study on height Control of Corn harvester in Hilly and mountainous area
abstract: The cutting table of corn harvester in hilly and mountainous areas can't be automatically adjusted to the complex terrain, which makes the level of corn harvest in hilly and mountainous areas on the low level. In order to solve this problem, the height control system of cutting table of corn harvester in hilly and mountainous area is studied in this paper. A height control framework of cutting table is proposed based on inclination sensor to test the angle of terrain changing and the adjusting angle of cutting table, which is based on the hydraulic dynamic model of harvester. Furthermore, the estimative method of ground slope is obtained, and three kinds of cutting table height control algorithms with different detection angle ranges of the system are designed. Finally, Simulation analysis and experimental verification are done. The results show that the simulation test time of the cutting table height reach to adjusting balance position is 0.8s and the actual test time is 1s on the upper 10deg, and the simulation test time of the cutting table height reach to the adjusting balance position is 0.5s and the actual test time is 0.6s on the upper 5deg. The maximum error of cutting table height control of corn harvester is less than 20% which adapts to the changing working conditions in hilly and mountainous areas and meets the design requirements. It meets the needs of harvest and improves the degree of automation of corn harvesting in hilly and mountainous areas.

title: SIMULATION ANALYSIS ON THE PERFORMANCE OF SPLITTING AND PICKING DEVICES OF CORN HARVESTER
abstract: In the design of corn combine harvester, there is a high demand for customization and diversification in China. Aiming at the problems of backward design method, lack of design knowledge and long product development cycle, the discrete beam method is used to establish the corn plant model. The model of subdevice and the vertical and horizontal roller picking device is established by using UG, and the virtual prototype model is established by using ADAMS software. Meanwhile, the simulation experiments on the kinematics and dynamics performance of the separating device, the corn plant and the picking roller are carried out, and the simulation results are verified by field experiments. Through this method, the design parameters of the separating device and the picking roller are serialized, the method of evaluating the separating performance and the picking performance is provided, and the development and design cycle is shortened, which provides certain reference and theoretical basis for the development and design of the corn harvester header.

title: Experimental Study on the Structural Safety of the Corn Harvester Attached to a Tractor

title: Machine Vision Based Algorithm for Blockage Recognition of Jittering Sieve in Corn Harvester
abstract: Jittering sieve is a significant component of corn harvester, and it is used to separate kernels from impurities. The sieves may be blocked by kernels during the separating process, leading to the reduction of working performance. Unfortunately, the automatic recognition of blockage has not been studied yet. To address this issue, in this study we develop machine vision based algorithms to divide the jittering sieve into sub sieves and to recognize kernel blockages. Additionally, we propose the metric to evaluate blocking level of each sub sieve, aiming to provide the basis for automatic blockage clearing. The performance of the proposed algorithm is verified through simulation experiments on real images. The success ratio of edge determination reaches 100% The mean cross correlation coefficient of the blockage levels and the actual numbers of blocked kernels for all test scenes is 0.932. The results demonstrate the proposed algorithm can be used for accurate blockage recognition, and the proposed metric is appropriate for evaluating the blockage level.

title: Six Sigma as Strategy of Maintenance in the Corn Harvester Massey Ferguson Model 7252
abstract: This article summarizes the results of a research aimed at implementing the Six Sigma methodology as a maintenance strategy in the Massey Ferguson model 7252 combine, and from this implementation, to know the current sigma level of the belt transmission system, a mechanism whose failures, cause low readiness of the system and the machine. The content of the work shows the particularities of the six sigma method. The results obtained after the implementation have allowed knowing the sigma value of the transmission system between two and three s, which does not allow transmitting the power with quality, torque and revolutions that the internal combustion engine of the machine offers. The repair cycle for the transmission subsystem, composed of two technical services, was completed. These results are applicable in similar systems, where high levels of operational safety are required.

title: Research Status and Development Trend of Corn Harvester Threshing Device

title: Design of Row Guidance Control System for Combine Corn Harvester
abstract: Row guidance is an important aspect of precision agriculture. Navigation system based on Global Positioning System has been well developed, however Global Positioning System cannot provide enough information on crop row and sometimes suffers from disturbance from the environment. So it is necessary to develop local sensor that can detect crop row during harvesting tasks. This article aims to integrate a self developed mechanical detection sensor into a row guidance control system. The mechanical row detection device based on angular sensor was used to detect crop row and return detected values as deviation for row guidance controller. The control method was introduced after linearizing the kinematic model of farm vehicle, then the road test platform was introduced. The test was conducted under three different speeds. We used Global Positioning System and inertial measuring unit to record the position and heading of the vehicle. For the road test, the average cross track error are below 0.1m, which meet the demand of navigation of combine corn harvester.

title: Design of On line Detection Device for Grain Breakage of Corn Harvester Based on OpenCV

title: Design of Picking Roller for Corn Harvester Picking Machine and Selection of Hydraulic Motor
abstract: In the actual application process, the corn harvester has problems such as high loss rate of fruit and energy waste. This article analyzes the corn picking device, the reason for the high loss rate is found, and a new picking roller is designed. Through the calculation of the force and torque of the picking roller and the chain during the harvesting process of the corn harvester, the power required for the picking device is obtained, and the hydraulic motor model required for the picking device is further obtained. Through design and analysis, we determined the optimum speed of picking roller in corn picking process: 836r/min, picking roll inclination angle: 35deg, and picking roll radial size: 75mm. The article determines that the hydraulic motor model is the American white cycloidal motor WS80.

title: Development of an Assembly Consistency End of Line Inspection System for Corn Harvester
abstract: Nowadays, along with the application of intelligent equipment and new technology, automation degree of manufacturing becomes more and more advanced. While corn harvester, as one of the most important agricultural machineries, the assembly quality was still inspected by traditional method depending on workers' experience in China. Transmission is the core part of corn harvester, which is also the vibration source of whole machine. Detecting and keeping transmission assembly consistency can reduce the vibration degree and increase the mean time to failure, and improve the performance of whole machine. In this paper, a transmission assembly consistency inspection system was designed and a method for judging the assembly consistency was proposed. The proposed approach included two parts, the vibration signals analysis, which was processed based on six bands method to calculate the energy of six bands; and the consistency comparison, which was used to judge the assembly consistency intuitively through the chart. In the last we chose the corn harvester pulverizer as an analysis object. According to result, the third and the fifth are incongruous.