基于机器视觉的零件表面瑕疵自动分拣系统设计

针对精密零件表面瑕疵人工检测工作量大且人为误差较大的状况,将计算机视觉技术用于精密零件表面瑕疵检测分析中,并结合嵌入式系统控制分拣机构对零件进行自动分拣。本文设计的一个基于机器视觉的零件表面瑕疵自动分拣系统,采用图像处理及模式匹配的方法,实现了零件表面瑕疵自动分拣。     

电动吸盘式分拣机械手自动控制系统设计

由于传统手动系统存在电机回转角度不准确、分拣效率低等问题,研究出一套自动分拣控制系统是具有必要性的,为此,提出设计电动吸盘式分拣机械手自动控制系统。架构自动控制整体方案框图,分别对系统硬件与软件展开设计,根据控制系统硬件原理,实现机械手上下料的自动传输,设计分拣机械手自动上下料装置方案,并对系统输入输出信息进行分配;设计触屏界面,对回转角度允许的误差和机运行速度展开分析,由此实现系统自动控制与运行。通过实验对比结果可知,采用自动控制系统电机回转角度准确、且分拣效率高。     

单片机在乒乓球自动分拣中的应用

本文研究了乒乓球自动分拣系统的各个组成部分的功能及各个组成部分的设备,把模块化设计和系列化设计的方法应用于乒乓球自动分拣系统,对系统各个组成部分的设备进行了模块划分,有助于提高乒乓自动分拣系统设计的通用化、标准化程度,为乒乓球自动分拣系统软件开发提供基础模块。     

物料自动分拣系统中PLC与上位机的通信

介绍了物料自动分拣系统的组成和控制原理，阐述了该系统所采用的松下公司的FP1型PLC与上位机之间串行通信程序的设计与实施，对串行通信协议和参数设置作了说明，给出了部分基于visual basic 6.0编写的串行通信程序。该通信功能的实现使得物料自动分拣系统具有智能程度高、可靠性高、便于二次开发等特点。     

条烟自动分拣机监控系统的设计

分析目前我国条烟分拣机的现状,并在此基础上开发了条烟高效自动分拣系统,简单介绍了条烟分拣系统,并对异步分拣法进行了阐述,设计了基于Profibus现场总线的监控系统,对硬件组成进行分析;研究了条烟分拣系统的控制策略,提出用"预测控制"下载订单,分析了上位机的软件系统,对条烟自动分拣机试验结果表明,该监控系统运行稳定可靠,效率高,具有一定的实用性和推广价值.     

基于机器视觉的工业机器人自动分拣系统设计

经济的发展推动了我国工业自动化进步,自动分拣是工业自动化中的一部分,传统的工业机器人自动分拣系统的分拣精确度较低,无法满足目前的工业化生产需求,因此基于机器视觉设计了新的工业机器人自动分拣系统.硬件部分设计了CCD图像采集器和运动控制卡,软件部分首先处理了工业机器人自动分拣图像,其次基于机器视觉识别了自动分拣工件类型,...     

浅谈邮件中文地址的自动处理

信函自动分拣系统在我国的一、二级邮区中心局普遍使用。系统采用先进的OCR技术识别和人工(单字)补码技术，对六位邮政编码进行识别，并按照不同的分拣方案．对邮件进行自动分拣，为大规模、高效率进行邮件处理提供了保证。计算机技术的迅猛发展，为信函分拣的自动化提供了技术支撑，如采用多种OCR识别模式对打印体的窗口信封、贴条信函等的识别，大大提高了信函分拣的处理率，降低了误识率。     

烟叶自动分离及智能定级分拣系统的研究

当前,科学技术和人工智能的快速发展,为烟叶的自动分离和烟叶质量的自动检测分析提供了有效的方法和手段;针对目前烟叶的分离和分级仍采用传统的人工方式,从而使分级结果的主观性较强,导致分级不具备科学性、客观性等一系列问题的出现,提出对烟叶自动分离及智能分级分拣系统的研究。该系统在设计上以工业计算机为核心,使用Visual Basic编程语言编制软件,应用专家系统结构进行智能控制,采用DCS分布式控制系统,监控各个工段的运行工作,并且详细阐述了该系统实现烟叶的自动分离、智能检测定级、智能分流分拣的过程和系统间各个工段的工作原理。模拟实验测试结果表明,本系统各个工段都运行流畅,烟叶分离效果明显,分级结果的正确率也较高,可以实现对烟叶的有效分离、分级和分拣。     

基于树莓派和OpenCV的视觉识别与分拣系统

由于传统的人工分拣技术在物流分拣环节中具有成本高、效率低、易出错等缺点，随着物件的增加，分拣难度越来越大，因此各行各业都在研究如何提高分拣效率和精确度。基于树莓派和OpenCV的物品分拣系统，具有成本低、效率高、易部署、可维护等优点。该系统利用摆轮分拣机灵活可操作性的特点，采用方向分拣和树形分拣两种结构，通过树莓派和OpenCV的结合应用，识别出对应物品后，向摆轮机传输指令，摆轮机对物品进行不同方向的快速分类操作，可以有效解决传统人工分拣的问题。     

基于改进Faster RCNN的工业机器人分拣系统

传统的分拣作业无法伴随工作环境的变化进行相应的调整,针对此种不足,出现了基于机器视觉的分拣机器人的相关研究,通过将图像处理和特征工程技术引入视觉模块,使得分拣系统能适时的调整.不同于这些方法,本研究基于实验室的工业分拣系统,将深度学习方法应用其中.通过将Faster RCNN检测算法引入视觉模块并对区域提取网络RPN进行相关改进,加快Faster RCNN模型的检测过程,使得该系统满足工业的实时性要求.Faster RCNN作为一种端到端的方法,能自动对输入图像生成更具表达力的特征,对相应目标提取相应特征,这避免了人工设计特征,它的特征自动生成能力使其能适用于各种场景,这提升了工业分拣机器人的环境适应能力.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

正~~     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate