The Research Of Test Bench Of Portable Seed Metering Device Based On ARM9

Now precision seeding technology is an important direction of sowing technologydevelopment. The performance testing of precision seeder machine which realized precisionseeding technology is an indispensable part in the research and development. Compared withaviation, electric power, automotive electronics, medical and other industries, the instrumentsand equipment of agricultural machinery and equipment is relatively backward. The reasonsof the price of the sensor, sensitivity to detect and the degree of difficulty cause the lack ofstandard testing instruments of the the sowing quality test project. Topics intends to design asophisticated, intelligent and environmentally friendly seed metering device test bench.The design of the test bench designed primarily comprises a control part of the design,the sensor research and the design of the mechanical part. This paper completed the controlpart and mechanical part of the test rig.The paper analysis the relevant test methods in GB/T6973. The test bench must meet thefeatures of smart, portable, easy to operate, display intuitive. We developed the overall designof the test of the the metering device. Using modular design, the whole system is divided intomain support frame, mounting bracket seeding institutions, transmission, clutch mechanism,intelligent digital display system, seeding detection system Seeding automatic control system.The paper complete the design and assembly of the mechanical part of the overall virtual testbench, including the main support frame mounting bracket seeding institutions, supportingpart of the transmission mechanism, the clutch mechanism, and electrical components. Weimplement the ANSYS finite element analysis to key parts, to ensure the feasibility of thedesign. The paper study the control strategy, and choice a the fuzzy PID closed-loop controlstrategy to control the speed of the motor, and applicate Matlab to simulate. We compose thefuzzy PID program using C language, and used in the automatic control system. We build thecontrol system of SCM,inverter and motor. We build a mathematical model of the controlsystem which uses SCM output as input values, the motor speed as the output value. In thepaper we establish the display platform of detection and control based on ARM9. Weestablish a control signal converting circuit based on TLC5615chip mainly. We establish thephotoelectric encoder tachometer module based on E6B2-CWZ6C of incrementalphotoelectric encoder produced by Omron. We built monitoring platform of ARM9based onS3C2440, and we write the software and debugging success.The innovation of this paper is ARM9to be applied to our own design portable seed metering device test bench, and used Fuzzy PID control strategy to improve the system ofcontrol accuracy and speed of response, and Experiments show that the fuzzy PID controlstrategy greatly shorten the reaction time of the system to improve the control precision andspeed of response.