Dissertation
Dissertation > Agricultural Sciences > Agricultural Engineering > Agricultural machinery and implements > Harvesting machinery > Grain,wheat combine harvester ( Awn )

Study on the Monitoring System for Cleaning Loss of the Grain Combine Harvester

Author ZhouXianLong
Tutor ZhuRuiXiang
School Northwest University of Science and Technology
Course Agricultural Mechanization Engineering
Keywords Grain combine harvester Cleaning the loss rate Monitor SCM
CLC S225.3
Type Master's thesis
Year 2010
Downloads 64
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Grain combine harvester is one of the major items of equipment in the modern agricultural production process , with the increase in the useful life of the combine harvester and maintenance , improperly adjusted , the harvesting losses caused more and more attention . Currently , the country has not matched with a grain combine harvester cleaning loss monitoring products , most of the cleaning loss rate is calculated using the harvest time by manual count bags or post-harvest , low efficiency , large errors , and not real-time monitoring . In this paper, the grain combine harvester job cites election losses and not real-time detection problems , the design of an intelligent monitoring system , timely alarm when the loss rate exceeded the driver , to achieve real-time monitoring purposes, aimed at reducing the harvest losses. Loss test method of analysis of the reasons for the loss of the cleaning and domestic and international grain combine harvester cleaning products on the basis of the design of a sensing film , by sensing membrane cereal impact pulse count , loss of cereal grain measurement of the amount of . According to the the combine harvester operating environment of sensing membrane performance requirements induction film works , determine the material and structure of the sensing film , and sensing membrane in Pro / Engineer and Auto-CAD , 3D solid modeling and engineering design drawings . Monitoring system hardware design STC89C52 microcontroller as the core , the hardware is the main power circuit , speed sensor , microcontroller and its peripheral circuit , keyboard circuit , photoelectric isolation circuit , logic circuits , liquid crystal display circuit and alarm circuit and other components . Select the appropriate components to build the hardware circuit , and circuit debugging . Modular programming ideas , use C51 language preparation of the monitoring system software , the software part of the main initialization module , keyboard module , interrupt module, LCD module and the main program module, etc. . By Keil and Proteus joint system , hardware and software debugging and emulation . The simulation results show that : the the human estimate the conditions set grain yield and grain weight automatic acquisition equipment forward speed , the loss of grain quality and loss calculation and monitoring ; in the case of loss rate exceeded the automatic alarm ; system is running stable , reliable, and meet the design requirements .

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