Studies On The Synchronous Intelligent Control System Of The Precision Sowing Pipeline For Tobacco Grow Seedling

Apart from a small portion of makhorka and sun-cured tobacco adopt direct-seeding, the majority of tobacco planting areas are seedling transplantation in China’s tobacco cultivation. The basic requirement of the seedling is that timely bred in sufficient quantity and size suitable for strong seedling. The level of the tobacco seedling’s quality direct impact the quality of the production of flue-cured tobacco. The disadvantage of traditional seedling methods are laborious, time-consuming, the amount of seed and high cost. The seedling of nursery seedling plate can be subject to environmental impact, and can be easy to implement the intensive seedling production, at the same time can be mechanized production which has high efficiency. Making the seedling cycle shortened, higher seedling yield, seed cost and higher improved variety’s utilization.The technology of the seedling of nursery seedling plate is suitable in very large range, it not only can be used in tobacco grow seedlings, but also widely used in the cultivation of flowers and plants seedling and vegetable seedling.The study of the synchronous intelligent control system of the seedling production line has been carried out based on the study of the the seedling production line home and abroad. With the use of MCU, stepping motor, photoelectric sensor, electromagnetic clutch, the control system realized the seedling of nursery seedling plate on the entire pipeline unattended operation, it means that all aspects of the pipeline have automated and intelligent features. It has realized the purposes of the efficiency increasing, the seeding accuracy, the different species adaptability and the reduction of labor intensity. The main content we studied and results as following:1. Combined with the agronomic requirements of tobacco grow seedlings, analyzed the key technology of planting tobacco grow seedlings sowing pipeline. Determined the composition of the pipeline and described the structure and mechanical control methods for each device. Designed a float tray and automatic plate stacked disk device on the basis of the existing pipeline, which effectively reduced the labor intensity and enhanced labor efficiency.2. Combined with each device’s working principle on the pipeline, designed the hardware circuit for each module which include the selection of components and determine relevant parameters. And designed touch-screen communication system which based on Modbus protocol, which improved the man-machine interface of control system.3.On the basis of hardware circuit’s design, the program is developed in this paper, which includes system flowchart and subroutine flow chart of each module.4. The related device’s real-time response for the movement of float tray, and the simultaneously harmonize compensate between the devices, and intelligent control of system have been verified based on the experiment of each device on pipeline. And introduced the "one-button control" thought, realized the fool operation of the pipeline.Through the study of tobacco seedlings synchronization intelligent control system and dynamic simulation, and with the hardware and software design and commissioning, the results show that the system design is feasible. There is a certain practical value to improve the automation and intelligent level of the tobacco grow seedlings line.