文献类型： 外文期刊
作者： Li, He 1 ; Guo, Changle 1 ; Yang, Zishang 1 ; Chai, Jiajun 1 ; Shi, Yunhui 1 ; Liu, Jiawei 1 ; Zhang, Kaifei 1 ; Liu, Daoqi 2 ; Xu, Yufei 1 ;
作者机构： 1.Henan Agr Univ, Coll Mech & Elect Engn, Zhengzhou, Peoples R China
2.Henan Acad Agr Sci, Changyuan Branch, Xinxiang, Peoples R China
关键词： target spraying; precision weeding; machine vision; YOLOv5; lightweight model
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）
ISSN： 1664-462X
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Deep learning techniques have made great progress in the field of target detection in recent years, making it possible to accurately identify plants in complex environments in agricultural fields. This project combines deep learning algorithms with spraying technology to design a machine vision precision real-time targeting spraying system for field scenarios. Firstly, the overall structure scheme of the system consisting of image acquisition and recognition module, electronically controlled spray module and pressure-stabilized pesticide supply module was proposed. After that, based on the target detection model YOLOv5s, the model is lightened and improved by replacing the backbone network and adding an attention mechanism. Based on this, a grille decision control algorithm for solenoid valve group on-off was designed, while common malignant weeds were selected as objects to produce data sets and complete model training. Finally, the deployment of the hardware system and detection model on the electric spray bar sprayer was completed, and field trials were conducted at different speeds. The experimental results show that the improved algorithm reduces the model size to 53.57% of the original model with less impact on mAP accuracy, improves FPS by 18.16%. The accuracy of on-target spraying at 2km/h, 3km/h and 4km/h speeds were 90.80%, 86.20% and 79.61%, respectively, and the spraying hit rate decreased as the operating speed increased. Among the hit rate components, the effective recognition rate was significantly affected by speed, while the relative recognition hit rate was less affected.
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