Bolster Spring Visual Servo Positioning Method Based on Depth Online Detection

IF 5.2 2区 计算机科学 Q2 ROBOTICS
Huanlong Liu, Zhiyu Nie, Yuqi Liu, Jingyu Xu, Hao Tian
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引用次数: 0

Abstract

The intelligent assembly system for railway wagon bolster springs needs to realize the positioning and grabbing of bolster springs, and also has high requirements for grabbing efficiency. To solve the problem of low efficiency of traditional visual servo positioning methods, an image visual servo (IBVS) control method based on depth online detection is proposed to improve the efficiency of maintenance operations. Based on MobileNetv3 network architecture and ECA attention mechanism, a lightweight object detection ME-YOLO model is proposed to improve the real-time positioning efficiency of bolster springs. The training results show that compared with the original YOLOv5s model, the detection accuracy of ME-YOLO is slightly reduced, but the model size is reduced by 81% and the detection speed is increased by 1.7 times. Taking advantage of the real-time detection advantages of the depth camera, a visual servo control method based on depth online detection is proposed to speed up the convergence of the IBVS system. A bolster spring grasping robot experimental platform was used to conduct a visual servo bolster spring positioning comparison test. The results show that the proposed ME-YOLO detection model can meet the grabbing needs of the bolster spring assembly robot system based on IBVS, while reducing the system convergence times by about 35%. The proposed IBVS method based on deep online detection can also further improve system operation efficiency by 7%.

基于深度在线检测的枕弹簧视觉伺服定位方法
铁路货车枕弹簧智能装配系统需要实现枕弹簧的定位和抓取,对抓取效率也有很高的要求。针对传统视觉伺服定位方法效率低的问题,提出了一种基于深度在线检测的图像视觉伺服(IBVS)控制方法,提高了维修作业的效率。为了提高枕弹簧的实时定位效率,基于MobileNetv3网络架构和ECA注意机制,提出了一种轻量级的目标检测ME-YOLO模型。训练结果表明,与原始的YOLOv5s模型相比,ME-YOLO的检测精度略有降低,但模型尺寸减小了81%,检测速度提高了1.7倍。利用深度摄像机实时检测的优点,提出了一种基于深度在线检测的视觉伺服控制方法,以加快IBVS系统的收敛速度。利用抱枕弹簧抓取机器人实验平台,进行了视觉伺服抱枕弹簧定位对比试验。结果表明,所提出的ME-YOLO检测模型能够满足基于IBVS的支撑弹簧装配机器人系统的抓取需求,同时将系统收敛时间缩短约35%。提出的基于深度在线检测的IBVS方法还能进一步提高系统运行效率7%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Field Robotics
Journal of Field Robotics 工程技术-机器人学
CiteScore
15.00
自引率
3.60%
发文量
80
审稿时长
6 months
期刊介绍: The Journal of Field Robotics seeks to promote scholarly publications dealing with the fundamentals of robotics in unstructured and dynamic environments. The Journal focuses on experimental robotics and encourages publication of work that has both theoretical and practical significance.
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