塑性混凝土防渗墙在册田水库除险加固工程中的应用

塑性混凝土防渗墙是坝体坝基防渗处理的一种有效方法,文中结合在册田水库除险加固工程中的实际应用,介绍了塑性混凝土防渗墙特点、施工工艺、混凝土配合比设计和质量检查。     

承担单一工业供水水库供水保证率推荐按月计算的方法

径流调节是确定河流治理开发方案及水利枢纽工程规模的重要环节,供水水库径流调节计算的任务是在来水确定的情况下,计算兴利库容、保证供水量和设计保证率三者之间的关系。根据《水利工程水利计算规范》（SL104-95）,对于综合利用的水库工程,当各用水部门设计保证率以不同方式表示时,先进行换算,统一以年保证率表示。但对承担单一供...     

PVC建材表面缺陷检测系统研究与设计

为满足PVC建材表面缺陷在线系统高速、高分辨率的检测要求,提出PVC建材表面缺陷检测的系统设计方案。为保证检测系统的实时性,硬件上采用面阵CCD摄像机与LED面光源相结合的图像采集装置,软件上采用实时处理和准实时处理相结合的图像处理方法。针对缺陷图像高噪声、直方图单峰明显的特征,提出边缘检测分割技术与数学形态处理相结合的算法流程。通过分析图像缺陷的统计特性,提取PVC建材表面缺陷区域的特征参数,利用基于决策树的分类器将缺陷分为气泡、色痕、裂痕等。实验结果验证算法的有效性和实时性,其缺陷的检出率达到95%以上,识别率达90%以上。     

GPU并行加速的均值偏移算法

为克服mean shift算法计算复杂度高、运行速度慢的缺点,提出一种基于GPU的快速mean shift算法.首先使用k-means算法对图像像素进行预分类,之后在预分类、下采样后缩小的数据集上进行mean shift聚类,以有效地降低算法复杂度.此外,借助GPU的通用计算功能对k-means和mean shift分别进行并行了处理.实验结果表明,通过对图像进行预处理,有效地提高了几何模板查找在强噪声、低信噪比图像中的识别率;同时,改进后的mean shift算法的运行速度提高了近40倍,满足了高速机器视觉检测的实时性要求.     

拉铆钉多参数实时在线视觉检测系统研究

本文以引进吸收再创新的模式,综合机器视觉技术、自动化技术和集群协作处理技术,研发“拉铆钉多参数实时在线视觉检测系统”。     

基于创达版特种设备检验管理系统的条形码开发及应用

探讨了基于创达版特种设备检验管理系统进行检验报告条形码管理的二次开发,重点介绍了条形码的选型和电子表单架构下条码的生成机制,并给出了条形码文件管理。     

Evaluation of tile–wall bonding integrity based on impact acoustics and support vector machine

It is well recognized that the impact-acoustic emissions contain information that can indicate the presence of the adhesive defects in the bonding structures. In our previous papers, artificial neural network (ANN) was adopted to assess the bonding integrity of the tile–walls with the feature extracted from the power spectral density (PSD) of the impact-acoustic signals acting as the input of classifier. However, in addition to the inconvenience posed by the general drawbacks such as long training time and large number of training samples needed, the performance of the classic ANN classifier is deteriorated by the similar spectral characteristics between different bonding status caused by abnormal impacts. In this paper our previous works was developed by the employment of the least-squares support vector machine (LS-SVM) classifier instead of the ANN to derive a bonding integrity recognition approach with better reliability and enhanced immunity to surface roughness. With the help of the specially designed artificial sample slabs, experiments results obtained with the proposed method are provided and compared with that using the ANN classifier, demonstrating the effectiveness of the present strategy.     

Characterization of surface deformation with the Edge of LightTM technique

The aircraft lap joints are inspected with an enhanced visual inspection technique named “Edge of Light”, which is patented by the NRC Institute for Aerospace Research. This technique is applicable for rapid detection of possible hidden corrosion in lap joints. The surface deformation due to hidden corrosion can be characterized by this optical-based inspection method. In this study, a calibration procedure is developed to quantify the lap joint surface deformation. The effect of surface reflectivity is investigated with the solid film highlighting technique (SolidHi^TM), which helps achieve a uniform reflectivity during the inspection. The efficiency of the technique is demonstrated with the experimental results. This work is supported by NRC-IAR New Initiative Research Funding.     

基于视觉检测技术的浮球姿态测量

给出一种基于图像信息估计被测浮球及其中心轴孔空间姿态的视觉检测方法.若相机焦距已知,且给定空间球与圆特征的形状参数,则可由单视方法估计该球心与圆特征中心位置及其法向方向.基于该算法,可实现对被测球体中心轴端面法线方向的估计,同时还可估计出被测球体及端面中心的位置,从而实现对目标浮球位置及姿态的非接触测量.数值仿真及实际图像处理结果表明了该算法的有效性.     

计算机视觉检测技术在吻合器检测中的应用研究

提出了一种利用计算视觉检测带手柄吻合器漏针新方法。通过采用正面光源投照的检测装置,综合运用图像处理和识别方法对利用CMOS相机采集的吻合器图像进行数学形态学,图像增强等方法处理,并提出模糊局部阈值分割算法实现吻合器漏针的自动识别,并根据面积特征判别漏针数。实验表明：该方法能够对多种型号颜色的吻合器进行稳定、准确的快速检测,检测正确率可达95.6％,平均每次检测时间为2.385s,本方法实用性强,适合现代化生产的要求。