印刷品缺陷检测的方法研究

主要阐述了印刷品缺陷检测系统的硬件构建,以及在VC 环境中,如何获取图像,处理图像,标出待测印刷品与标准印刷品的差别之处,以及显示2幅印刷品的墨量差别,最后阐述了如何对2幅印刷品进行定位.     

印刷品在线检测系统在应用中出现的问题及解决方案

论述了印刷品在线检测系统在实际应用中出现的几个问题,以及企业工人对印刷品在线检测系统的认识,并对在线检测系统以后的改进提出了自己的观点.     

基于欧氏距离方法的缺陷识别技术研究

通过分析常见的印刷缺陷特征,提出了基于缺陷几何形状和墨量变化共同判断缺陷类型,即通过欧氏距离方法检测缺陷的形状、位置等特征,并设计了一种色度和密度转化算法,来判断印刷缺陷的墨量变化,成功实现了对印刷品缺陷的提取、分类及反馈。     

基于840D数控系统的机床功率在线监控方法研究

本文针对数控机床功率在线监控的需求,提出了一种基于西门子840D数控系统的机床功率监控解决方案,并开发了功率在线监控系统。该系统通过840D系统的内部PLC以及AD数据采集卡,实现了对数控机床功率数据的实时采集,进而实现了机床功率在线监控功能。     

全自动印品质量检测系统的技术分析

介绍了印品质量在线检测系统的结构、原理及意义,分析了该系统中图像采集、图像处理、模板建立等关键技术,介绍了图像采集及处理的方法,对模板的建立提出了取现法、特定样张法、比较平均法等多个解决方案,并对系统的应用进行了讨论,当系统的检测速度及精度达到一定要求后,可直接应用到印刷设备上,进行在线检测,使机器对墨量进行自行控制.     

应用光纤传感器和旋转编码器的印刷品在线标废系统设计

实现产品由人工离线检测变为实时在线检测对企业具有重大意义。本系统利用单片机控制技术、光纤传感器探测技术和旋转编码器测距技术，实现了对印刷品的实时在线标废。本文从控制系统方案论证、传感器选型、硬件配置、软件开发等方面作了介绍。经过长期运行，证明该系统高效、可靠。     

阳极化整流器在线校准系统研究与实现

本文介绍了阳极化整流器在线校准系统的技术方案和关键技术实现途径.该系统分为数据采集端和远程控制端,数据采集端实现对整流器数据的实时采集;远程监控端实现远程控制现场设备,已应用于生产任务中,不仅实现了对阳极化整流器的不停产在线校准,而且还可推广至其它生产线上设备的在线校准,最大程度缩短设备停机时间,提高生产效率.     

基于iCAM的印刷品在线颜色复制质量的检测与评价

目的为了提高印刷品在线检测中颜色复制质量评价的准确性,构建基于iCAM图貌模型的印刷品在线检测色差计算模型。方法将印刷品在线检测系统中CCD相机拍摄的待检测样张按照墨区进行分区,基于iCAM图貌模型和IPT均匀颜色空间建立在线色差检测模型,并计算样张各个墨区的色差;设计视觉心理学实验评价样张各墨区颜色的复制质量;采用STRESS值评价基于iCAM的色差检测模型计算出的色差与视觉感受色差的一致性,并与基于CIELAB的色差进行比较,验证该模型的在线色差预测精度。结果基于iCAM的色差模型计算结果具有较高的视觉一致性,更符合视觉评价结果,且与传统色差模型相比,具有更高的在线色差检测精度。结论基于iCAM的印刷品在线检测色差计算模型考虑了人眼视觉的空间特性及色适应,适用于复杂观察条件,能提高印刷品在线检测中的色差检测精度,可用于实际生产中印刷品在线颜色复制质量的检测与评价。     

彩色印刷品缺陷在线检测方法的研究与探讨

介绍彩色印刷品图像在线检测的基本流程.探讨相比于灰度图像缺陷在线检测的几个关键技术,对彩色印刷图像颜色缺陷在线检测提出一些新思路.     

基于全画面的印刷品在线色差检测模型

介绍了基于全画面的彩色印刷品在线色差检测模型的结构,从实际需求的实时性和可靠性两方面,论述了模型中所采用算法的基本原理.为彩色印刷品在线色差检测构建了一种新模型.     

Accuracy of color determination from spectroscopic ellipsometry measurements

In many coating and display applications, quantitative determination of the sample color is required. Standard procedures exist for converting an experimentally measured reflectivity spectrum into color coordinates such as CIE L*a*b*. In this paper we evaluate CIE L*a*b* color coordinates using a reflectivity spectrum which is calculated from an optical model determined by a spectroscopic ellipsometry (SE) analysis of the sample. The accuracy of the SE-determined color coordinates are compared with traditional color measurements, and the advantages of using SE for color determination are discussed.     

An integrated model for statistical and vision monitoring in manufacturing transitions

Manufacturing transitions have been increasing due to higher pressures for product variety. One dimension of this variety is color. A major quality control challenge is to regulate the color by capturing data on color in real‐time during the operation and to use it to assess the opportunities for good parts. Control charting, when applied to a stable state process, is an effective monitoring tool to continuously check for process shifts or upsets. However, the presence of transition events can impede the normal performance of a traditional control chart. In this paper, we present an integrated model for statistical and vision monitoring using a tracking signal to determine the start of the transition and a confirmation signal to ensure that any process oscillation has concluded. We also developed an automated color analysis and forecasting system (ACAFS) that we can adjust and calibrate to implement this methodology in different production processes. We use a color transition process in plastic extrusion to illustrate a transition event and demonstrate our proposed methodology. Copyright © 2003 John Wiley & Sons, Ltd.     

Remedy of dye manufacturing process effluent by UV/H2O2 process

The effluent from dye manufacturing industry is more difficult to be treated than laboratory synthesized wastewater according to high variability of composition and color intensity. Thus, this study aimed to propose the method for remedying industrial effluent by UV/H2O2 process in a recirculated batch reactor system while considering the effects on hydrogen peroxide dosage, UV power and wastewater intensity for the removal of color and COD. From the experimental results, it was feasibly treated that the distinguished removal of color and COD by increasing the hydrogen peroxide dosage and UV power, but not by the strong intensity of industrial effluent. Therefore, UV/H2O2 process of the developed reactor was a positively superior treatment or pre-treatment for dye manufacturing plant effluent to comply the regulated requirements.     

色彩空间转换的理论和实证研究综述

首先介绍了一些主流的色彩空间,对色彩空间转换流程进行了介绍,随后对国内外关于各种主流色彩空间的转换的研究文献进行了综述,最后给出了未来色彩空间转换研究的发展方向。     

胶态金纳米型时间-温度指示器性能研究

目的 探究基于金纳米颗粒的时间温度指示器（Time-temperature indicator, TTI）的变色机理及不同制备参数对其动力学参数的影响,为其在食品上的实际应用提供参考依据。方法 以明胶与氯金酸的还原反应为基础制备胶态金纳米型时间-温度指示器。通过紫外-可见分光光度计对TTI的吸光度进行测定,并将其与时间进行非线性拟合。采用单因素实验探讨制备参数对反应速率、变色寿命和活化能的影响。结果 TTI体系中生成的金纳米颗粒使得TTI呈现紫红色,金纳米颗粒数量的增加导致TTI的颜色变深。明胶用量减少而明胶-氯金酸质量比不变,以及明胶用量不变而明胶-氯金酸质量比增大的情况下,TTI体系的反应速率变慢,变色寿命延长。明胶-氯金酸质量比决定了TTI体系的活化能。TTI的活化能的范围为77.89～84.58 kJ/mol。结论 TTI具有监测因脂肪氧化而变质食品的潜能,通过调节TTI的制备参数可改变其变色寿命以匹配不同货架期的食品。     

纳米二氧化钛对质子辐照下MQ增强硅橡胶力学性能的影响

采用空间综合辐照模拟设备研究了纳米二氧化钛对100 keV和150 keV能量质子辐照下MQ增强加成型硅橡胶力学性能的影响。试验结果表明,质子辐照后,未添加纳米粒子的硅橡胶表面颜色明显加深,同时出现不同程度的老化龟裂裂纹,裂纹数量和深度随辐照能量和剂量的增加而增加;硅橡胶的硬度和拉伸强度随辐照剂量的增加先增加而后降低。添加纳米二氧化钛的硅橡胶与未改性硅橡胶相比,经过相同能量、剂量的质子辐照后,表面颜色加深和表面裂纹损伤的程度均减小,硬度和力学性能的损伤程度下降,表现出明显的抗质子辐照性能。     

UV固化喷墨中光引发体系的研究

本文选择了6种光引发剂和5种颜料，测试了光引发剂和颜料的吸收谱图。研究了不同颜料体系的光引发剂与UV喷墨固化时间的关系，其中涉及单引发体系与复合引发体系对固化时间的影响。     

The color removal of dye wastewater by magnesium chloride/red mud (MRM) from aqueous solution

In this study, the MgCl₂/red mud system (MRM) was used to investigate the color removal efficiency of dye solutions. Parameters such as the effect of the dosage of red mud (RM) and MgCl₂ have been studied. The effect of pH on the conversion rate of Mg²⁺ has also been studied. The color removal efficiency of MRM was compared with that of PAC/RM and PAC/NaOH. Meanwhile, the color removal efficiency of RM was compared with that of NaOH. The results show that the MRM system can remove more than 98% of the coloring material at a dosage of 25 g RM/L dye solution and a volume of 1.5 mL MgCl₂/L dye solution in the decolorization process of reactive dye, acid dye and direct dye. The color removal efficiency was better than PAC/RM and PAC/NaOH system. The adsorption data have been analyzed using Langmuir and Freundlich isotherms. The results indicated that both models provide the best correlation of the experimental data. The decolorization mechanism of MRM was discussed, too. The MRM system was a viable alternative to some of the more conventional forms of chemical treatment of dye solutions and also provided another way to make use of industrial waste red mud.     

竹篾染色工艺的优化研究

在竹篾的染色过程中,研究了添加双季铵盐表面活性剂来改善染色效果。探讨了表面活性剂的用量、染色时间、温度等因素对竹篾色差值的影响,采用响应面法对染色工艺进行了优化,研究结果表明,表面活性剂能够有效地提高色差值。当表面活性剂的用量为0.9%、染色温度93.0℃、染料质量分数为0.7%、染色时间为60min时,竹篾的色差值可达到70.13NBS,比在相同工艺条件下未加入表面活性剂时,提高了15.76NBS。     

Effects of gap size and UV dosage on decolorization of C.I. Acid Blue 113 wastewater in the UV/H2O2 process

The wastewater from textile dyeing industry is difficult to be treated successfully according to both high variability of composition and color intensity. To investigate the effects of reactor gap size and UV dosage on the decolorization of dye wastewater, a commercially available azo dye C.I. Acid Blue 113 was chosen as a model compound. UV/H2O2 processes with various gap sizes and setups of plug flow reactor and recirculated batch reactor were proposed to deal with the dye wastewater in this study. The experimental parameters including the design of reactor configurations of annular gap size, and in batch system or plug flow reactors and hydrogen peroxide dosage, UV dosage were investigated. The gap size of reactor was adjusted by different diameter of reactor shells in order to optimize the reactor configuration. The color removal percentage was used to evaluate the treatment efficiency. An optimal hydrogen peroxide concentration of 46.53 mM was observed in this study for highest decolorization rate. Besides, the pseudo-first-order rate constant of 3.14 min(-1) was obtained by plug flow reactor with 0.5 cm gap size, 120.70 W/l of UV dosage and 23.27 mM of H2O2 dosage. The first-order rate constant, which was about 20 times less than that of plug flow reactor, was obtained 0.1422 min(-1) by recirculated batch reactor with 2.0 cm gap size, 7.0 W/l of UV and 23.27 mM of H2O2 dosages. Ultimately, we developed an effective pre-treatment or treatment technology for dye wastewater to provide the dyeing industries and dye manufacturers an alternative to meet the effluent standards.