Abstract
In order to improve the automation and reliability of the mechanized transplanting, a vegetable seedling automatic conveying system was designed. The functional execution component of the system consists of a tank-wheel storage seedling mechanism, a seedling tray conveyor, and a hanging cup circulating conveying mechanism. Combined with the communication technology between host computer and programmable logic controller (PLC), the user interface software of automatic conveying system for potted vegetable was developed by using Visual Studio to control and monitor the transmission progress. The PVDF pressure sensor was used to detect the pressure change of the seedling storage disk to obtain the information of the loading seedling tray. The limit switch and stroke switch were combined to obtain the information of the push rod and feed plate. The timing of each component is controlled by the PLC controller combined with the feedback information of each sensor. The test results show the effect of taking an individual seedling is excellent, the error rate of the pushing mechanism is about 2.08%, and the success rate was 97.91%.
Highlights
Vegetable bowl seedling automatic conveying is an important step in the realization of automatic vegetable transplanting technology [1, 2]; the key problem is how to convey seedlings orderly to planting institutions, including the exact supply of seedlings, seedling bowl individual removal, and orderly delivery and delivery operations [3,4,5]
Wang et al designed a vegetable bowl seedling transplanter automatic potting and conveying device based on programmable logic controller (PLC), using of the top of the folder to take the seedling method to achieve the accurate launch and positioning of vegetable seedlings, effectively reducing the degree of loss of vegetable seedlings [11]
Yang et al designed a seedling transplanter automatic transfer device based on the PLC vegetable and precise control of the motor speed to improve the accuracy of the vote during the delivery process [12]
Summary
Vegetable bowl seedling automatic conveying is an important step in the realization of automatic vegetable transplanting technology [1, 2]; the key problem is how to convey seedlings orderly to planting institutions, including the exact supply of seedlings, seedling bowl individual removal, and orderly delivery and delivery operations [3,4,5]. The conveying process of most vegetable automatic transplanting machine seedlings rely on the mechanical structure of the transmission [9]. In order to improve the operation quality of automatic transplanting machine and enhance the automation level and reliability for vegetable seedling delivery, a mechanical automatic transmission system of vegetable seedlings is designed in this paper. Mechanical transmission, sensor technology and PLC control technology, and the functions of monitoring and control technology were combined to develop a fully automated vegetable seedling conveying control software. 3.1 Automatic conveying device design the automatic conveying device of potted vegetable seedling includes grooved wheeled seedling storage mechanism, push rod mechanism, limit sensor, missing tray detection sensor, seedling plate conveyor belt, seedling picking mechanism, potted. The CCD camera is arranged above the conveying track of the cup to monitor the leakage and load status of the potted vegetable seedling in the cups and to obtain the conveying information
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