Design Of Electronic Control System For Vegetable Seedling And Seeding Assembly Line

In recent years,the development of intelligent greenhouses has become more and more mature,and intelligent vegetable factories are slowly changing our lives.The vegetable seedling planting line is the front-end step of the intelligent vegetable factory,and the processed seedling tray will be placed in the intelligent vegetable factory for subsequent seedlings.This kind of automatic seeding equipment can greatly improve the production efficiency compared with the previous manual purely manual completion of soil paving,hole pressing,seeding,and soil covering of the seedling tray.At present,although my country’s existing vegetable seedlings and seeding lines can realize automatic paving,hole pressing,seeding,soil covering and other related functions to a certain extent,its seeding accuracy and production efficiency still need to be improved.This design is based on research at home and abroad,in order to improve the control accuracy and production efficiency of leafy vegetable seedlings and seeding lines:1.The improvement of the mechanical structure of the seeding assembly line.In order to improve the production efficiency of the seeding assembly line and reduce the distance between adjacent seedling trays on the assembly line during the production process,the original passive cavitation roller is improved into an active cavitation roller,whose rotation power is provided by a stepping motor.In addition,through theoretical analysis and practical verification,the original 12-row indenter in the circumferential array of the hole-pressing roller was changed to a full-circumferential array of 15 indenters.2.The hardware circuit design of the seeding assembly line electric control system.According to the technical indicators of the assembly line,the hardware circuits required for the design are designed.Including microcontrollers,sensors,actuators,etc.,using a travel switch to detect the position of the seedling tray on the assembly line,and the microcontroller sends related instructions to other driving mechanisms to perform corresponding actions.At the same time,the software Processing matched with the microcontroller is used to make a human-computer interaction interface,which can directly set the production efficiency and display the production status on the industrial computer,and cleverly uses the advantages of the combination of Arduino and Processing software and hardware.3.The software design of the electric control system of the seeding assembly line.Combined with the operation technical indicators,complete the control program of the entire assembly line for automated production.It mainly includes the bottom drive when each device is individually controlled,the closed-loop compensation algorithm design of the cavitation device and the seeding device,and the comparison of single-core or multi-core microcontrollers when the entire pipeline is integrated.It also includes the design of program logic algorithms such as how to automatically match the rotation speed of the pipeline conveyor belt in real time and how to realize the automatic initialization position of the cavity pressing roller and the seeding roller.4.Test and analysis of the electric control system of the seeding assembly line.For some mechanical structural improvements,hardware circuit design,software algorithm design and other related theoretical designs,actual experiments are conducted to verify.It mainly includes related tests such as the detection and control of the transmission device,the control of the paving device,the control of the cavitation device,and the control of the seeding device.Through the shortcomings revealed in the test,the design plan is continuously optimized.Finally,the overall control effect of this design has been verified by actual experiments,and it can achieve the agronomic production requirements of leafy vegetable seedlings and planting and the operating technical requirements of the equipment.The sowing qualification rate is 91% and above,the cavitation rate is controlled at 3.9% and below,and the rebroadcast rate is controlled at 5.1% and below.Under the premise of meeting the sowing qualification rate,cavitation rate,and rebroadcast rate,the highest production efficiency can be Achieve the work target of800 disks per hour and meet the technical requirements of the operation.