Research And Design On Aspirated Air Control System Of Tray Seeding

Xinjiang is a cotton-growing region.seedling transplanting is its main cultivation mode and theseedling planter is one of the key equipment of seedling transplanting technology. Start-up current basedon sucker toss-up the semiautomatic Plug precision planter production practices solenoid valve is tooprone response slow and unresponsive, and sowing suck species seeding action to be done manually,unable to complete the automation sowing due to air pressure The size can not be adjusted, can not beachieved automation sowing seeds of different varieties. In this paper, based on the original one-way plugseedling planter,we have a new ideas for a two-way pneumatic plug seedlings. The S51microcontrollerbi-seeded automatically controlled by the a bidirectional the nursery automatic control system.Seedling planting operation of the control process strategy has carried on the research and analysis,first of all, the two-way pneumatic hole plate of the seedling planter structure and working principle wereanalyzed. The function of control system were analyzed, It has carried on the overall design of itshardware system, It established the general flow chart of software, A mathematic model of thebi-directional control metering part that has carried On the simulation and analysis on the model, It buildthe mathematical model of the pressure automatic control system, The simulation is finished about themathematical model of MATLAB, It determie the speed of conveyor belt that is0.95m/s, It determie thesystem movement time that is1.2s, It determine the best pressure value of10kpa..It respectively designed on the hardware system of power supply module, data acquisition controlmodule, main control MCU and actuator control module, keyboard display module, serial portcommunication module. Power supply module included power supply parameters of the theoreticalcalculation and the design of power circuit; The data acquisition module included the selection of sensorlocation and sensor launch about receiving circuit, The control module included the stepper motor controlof module and the design of relay control module.As the core of the AT89S51constitutes software system,It included the design of analog input of theprogram, the design of main control program, the design of display module program. One of the maincontrol program includes the design of voltage regulation module program and the design of suitablecontrol program, It combined with the simulation software of uVision3which has be carried on the system,It combined protues software to finish the working process of visualization simulation system.Performance tests and experimental analysis of infrared sensor performance testing, the output signallinear processing orthogonal experiment Plug working-bit precision error analysis of the experimentalresults to determine the A2B2C2, the optimal combination of the experiment, the conveyor speed of themain factors of0.8m/s, and the top side of the secondary factors sensor distance of20cm, The secondaryfactors disk distance of30cm. Analysis of the source of the error. Solve the problem of low productivityPlug unidirectional sowing, provides a new way of thinking for the Plug sowing factory production.