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Smart Contract Defect Detection Method Based on Multi-Feature Fusion [PDF]
Smart contracts are one of the most successful applications of the blockchain technology. Owing to their widespread application, the security issues of smart contracts have attracted widespread attention from researchers.
Yifeng WANG, Cheng ZENG, Qingyu QUAN, Jiaoran WANG, Peng HE
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The Research on Steel Plate Defects Inspection by Magneto-acoustic Testing with Induction [PDF]
, 2015 随着工业化的发展，钢材被应用在了各种各样的领域，比如：天然气管道、轮船、汽车等等。然而，随着时间的推移，钢材在使用过程中会出现腐蚀、裂纹等缺陷，这些缺陷严重影响了使用的安全，所以必须在事故发生之前对其进行检测以评估其安全性。本文在对比多种无损检测方法及研究感应式磁声成像的基础上提出了感应式磁声检测的新方法。该方法是在静态磁场下，通过脉冲电流激励被测钢板表面，进而在钢板内部发生电－磁－声的相互转化，最后提取钢板表面的磁声信号。该方法与被测材料无接触，无耦合，可在恶劣环境下进行工作，非常适合钢板的在线检测。
游德海
core
Gaoya dianqi, 2019 SF6气体绝缘全封闭组合电器（GIS）内部可能出现金属微粒等异物缺陷导致故障,因此对GIS设备内部的异物缺陷故障进行检测具有重要的意义。X射线成像法是一种检测GIS设备内部缺陷的有效方法,但缺乏成熟的参数选择方法。文中对X射线检测的基本理论进行了介绍,对GIS设备X射线检测参数选择方法进行了讨论,并为220kV GIS设备内异物缺陷检测选择了合适的参数。在选定参数下,使用双丝像质计对射线成像系统的不清晰度进行了研究,验证了X射线对金属微粒缺陷检测的可行性 ...
周艺环 +5 more
doaj
Design and development of a AOI device control system for TFT-LCD electrode line defect detection [PDF]
, 2017 近年来，伴随着电子信息产业的蓬勃发展，薄膜场效应管液晶显示屏（ThinFilmTransistor-LiquidCrystalDisplay，TFT-LCD）的工艺技术也不断进步和提升，使得液晶外围电极线路的尺寸越来越小，已达到微米数量级，相应的缺陷尺寸缩小至亚微米量级。为满足TFT-LCD高质量高效率的生产要求，AOI（AutomaticOpticInspection）技术已开始用于TFT-LCD缺陷检测的相关工艺中，用来取代传统人工目视检测。而国内用于液晶屏电极线路检测的AOI研究尚未见报道 ...
郭振雄
core
A 3D printing defect detection algorithm incorporating attention mechanism [PDF]
In recent years, 3D printing technology has played an increasingly important role in a growing number of industries. However, as a relatively new technology, it tends to exhibit more defects during the printing process compared to traditional ...
DONG Xisong +5 more
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Research on Wood Surface Detection Based on Computer Vision [PDF]
, 2016 基于机器视觉技术对板材表面缺陷检测进行研究,设计了在线检测的硬件系统和软件处理流程,介绍了图像预处理、图像分割和目标提取等处理方法并对缺陷图像进行相应处理。利用C#软件对板材缺陷在线检测进行人机交互界面设计和在线调试及在线检测。实验结果表明,本检测方法可行,误检率低,可很好地应用于木材自动化生产过程的在线检测。This paper presents a study into board surface defect detection based on machine vision technology.
冯勇建, 郑志霞, 黄元庆
core
Internal Thread Defect Detection Based on Spherical Catadioptric Imaging and YOLOv7 [PDF]
Nuts are crucial components in mechanical manufacturing, where the quality of their internal threads significantly impacts mechanical connections. This study proposes a non-contact defect detection method for the internal threads of nuts using an image ...
Shijing ZHANG, Xutao MO, Xing ZHAO, Yanglin DONG
core +1 more source
Gaoya dianqi, 2021 利用特高频局部放电检测方法及时发现并处理气体绝缘金属封闭开关设备（GIS）内部固体绝缘缺陷,是GIS设备运维的重要手段。目前将异常特高频信号与现行标准、规范和典型模拟缺陷图谱进行比对从而诊断缺陷类型及严重程度的方法,因现场情况复杂、设备结构各异,准确性有待进一步提升。因此文中针对现场检测中发现的GIS固体绝缘表面放电缺陷和内部气隙放电缺陷,研究该类缺陷所激发特高频局部放电信号的PRPS统计图谱特征,并利用傅里叶变换和连续小波变换分析单次特高频原始脉冲的频谱特征和时频特征 ...
周电波 +6 more
doaj
Research Progress on Inspecting Food Bottle and Can Packaging Shortcomings Based on Machine Vision [PDF]
Based on the literature in recent years, the application and development of machine vision in the detection of food bottle and can packaging defects were introduced, and the hardware structure and detection process of the detection system were explained.
CHEN Wei-dong +3 more
core +1 more source
Shiyou jixie, 2012 鉴于传统检测方法的不足，研制了一种基于磁记忆检测原理的高压管汇直管便携式检测仪。介绍了高压管汇磁记忆检测及评价方法流程，对含典型缺陷的高压管汇进行磁记忆检测，对其剩余强度进行分析，建立了磁记忆检测信号与剩余强度的评价指标。分析结果表明，磁记忆检测信号值与高压管汇的缺陷类型、缺陷尺寸参数具有明显的相关性；检测信号可以较好地反映缺陷尺寸的变化；高压管汇的缺陷类型、缺陷尺寸参数与其剩余强度存在一定的定量关系，可据此关系建立高压管汇的检测评价标准；该研究内容可为高压管汇的定量化安全评价提供一种新思路。
张继信 +4 more
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