汽车前照灯仪校准器的CCD检测系统研究

本文介绍了一种以面阵CCD成像技术作为测试原理的汽车前照灯仪校准器检测系统的研究.该系统使用计算机数字图像处理技术和V C＋ ＋编程实现自动测量被测校准器的发光强度、远光光束中心、近光明暗截止线转角坐标以及光轴偏移角等特征参数的目的.其优点是测量精度高,重复性好,实现了测量自动化.     

大视场线阵CCD图像灰度均匀化

针对大视场线阵 CCD 图像不均匀现象,提出了一种基于图像像素灰度补偿的均匀化方法。首先分析并计算线形目标上不同坐标位置的微小面元在线阵CCD上产生的辐射照度,并由此推导线阵CCD面元上不同像素灰度值与中心像素灰度值之间的关系,进而建立大视场线阵CCD像面上像素的灰度补偿模型,实现大视场线阵CCD图像快速均匀化的目的。对大量线阵 CCD 采集的高速路面图像进行了处理,结果表明我们提出的方法具有较强的可行性、鲁棒性和实用性。     

基于多线阵CCD的激光投线仪数字化检测

在分析现有激光投线仪主要技术指标的基础上,提出了利用8个线阵CCD和1个面阵CCD对激光投线仪进行检测的基本原理以及误差判定方法,通过上位机软件对CCD所采集到的数据进行统一处理,并给出检测结果,同时进行存档打印。实践证明,该方法能大大提高检测效率。     

线阵CCD测量技术在烟草物理检测中的应用

论述线阵CCD技术及其在几何尺寸测量中的应用,对线阵CCD的特点和信号的处理方法进行了较为详细的描述。针对CCD信号二值化这一关键技术,提出了更为合理、精确的算法。并结合这一技术在卷烟厂中有关烟支长度的检测,进一步论述线阵CCD技术在大尺寸测量中的具体应用。     

采用面阵CCD对大尺寸轴径进行高精度测量的研究

采用面阵CCD对大尺寸轴径进行高精度的拼接非接触测量,克服了单片面阵CCD测量范围小的缺点,解决了用线阵CCD拼接测量时测量带太窄又不能扩展情况下所带来的问题。面阵CCD进行图像拼接的测量方法,适用于测量128-135mm的轴径,其测量精度高达±0.01mm。     

基于DSP技术的CCD测量系统构建

数字信号处理器(DSP)技术的线阵CCD测量系统由四部分构成:线阵CCD传感器,模数转换器(ADC),DSP处理器,主机等。在讲述CCD光采集和模数转换器的工作原理之后,结合DMA技术,介绍了DSP存储器双缓冲区工作原理。最后对DSP处理器与主机间的通信方式进行了陈述。系统很好地满足了实时控制系统的连续检测要求以及系统体积精小而容易装配等特点。     

激光投线仪线阵CCD检测终端的安装与标定

在利用线阵CCD进行激光投线仪的数字化检测与检定过程中,需要对多个线阵CCD检测终端进行正确安装和标准值获取.本文借助水准仪、经纬仪以及全站仪等测绘仪器进行安装,获取基本标准值,然后通过上位机软件将标准值进行存储,为激光投线仪的检测提供标准.该方法可以很好地做到量值溯源,为激光投线仪的检定提供了法定依据.     

机器视觉波纹阻火盘表面波高测量方法

针对目前波纹阻火盘采用人工取点的方式对波高进行测量引起的效率低、误差大等问题,提出一种基于机器视觉的波纹阻火盘表面波高测量方法。该方法先利用线阵CCD相机配合二维运动平台扫描的方式获取图像,再利用改进的FLANN自适应特征点匹配筛选算法优化拼接过程,提高线阵图像配准准确度,然后采用基于Zernike矩的亚像素边缘检测算法准确获取边缘定位,并结合该文提出的波高尺寸测量原理以及最小二乘法,确定最大波高对应的两个像素点的坐标,最后根据线阵相机标定结果计算得到实际波高尺寸。利用波纹阻火盘线阵图像进行实验,并与影像仪法测量结果进行对比,实验结果表明该测量方法测量误差在±0.02 mm以内,满足实际工业生产需要。     

CCD技术在光散射法测量微粒直径分布中的应用

本文提出了以线阵CCD光电探测阵列作为接收器,并以悬浮法测量固体粉末或混浊液中悬浮粒子大小及分布的激光粒度仪的设计方案;设计了径向散射光强分布的多周期间隔采样的CCD数据采集系统。使用研制的样机完成了多项实验,取得满意的结果。     

利用CCD测量单缝衍射的光强分布

本文介绍了线阵CCD测量系统的组成,利用线阵CCD对衍射光强分布进行了测量.本文中采用数据处理软件Origin对测量结果中的噪声进行了处理,同时拣出极大值和极小值位置.与用螺旋测微器测量的数据结果相比相对误差为4%.文中分析了影响测量结果的三个主要因素,结果表明,在没有外界光线干扰的环境下,CCD所得到数据结果能够达到很高的测量精度.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in     

Systematic Approach for Emerging Industry

正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration.     

Strictest Pollutants Emission Standards

正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions.     

Instructions to Authors

New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope     

Progress on Standards Copyright Protection

正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection.