基于ImagePro Plus的粗集料针片状颗粒含量分析
2016-11-08杨芬马丽英曹源文乔峰王琪
杨芬++马丽英++曹源文++乔峰++王琪++肖伟��



摘要:为了准确、快速地测出粗集料颗粒中针片状颗粒的含量,设计了“无影灯箱”,结合数码相机和计算机图像处理软件(ImagePro Plus),应用IPP分析法和游标卡尺法测量了集料颗粒的形状特征参数,并分析其针片状颗粒的含量。实测结果表明:ImagePro Plus具有良好的可行性和较高的准确度,适于集料生产加工过程中对针片状颗粒含量的测量。
关键词:粗集料;图像分析;ImagePro Plus;针片状颗粒
中图分类号:U414文献标志码:B
Analysis of Flat and Elongated Particles in Coarse Aggregate Based on ImagePro Plus
YANG Fen, MA Liying, CAO Yuanwen, QIAO Feng, WANG Qi, XIAO Wei
(School of Mechanical and Automotive Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
Abstract: The shadowless lamp box was designed to quickly and accurately measure the content of flat and elongated particles in coarse aggregate.Combined with a digital camera and the image processing software, ImageProPlus, parameters for the shape features of the particleswere measured with IPP analysis and vernier caliper, and the content was calculated. The results indicate that with its favorable feasibility and accuracy, ImagePro Plus is suitable for the measurement of of flat and elongated particles during the processing of coarse aggregate.
Key words: coarse aggregate; image analysis; ImagePro Plus; elongated particle
0引言
针片状颗粒是指颗粒长度大于该颗粒所属粒级平均粒径的24倍、厚度小于平均粒径04倍的颗粒。由于针片状颗粒形状过于细长、扁平,在施工中极易折断[13],从而增大集料空隙,且在一定程度上造成集料级配变异[23],影响混合料的性能,是一种有害颗粒。而且较多的针片状颗粒将使颗粒互相搭接,细小颗粒无法进入,对混合料的集料强度、抗车辙能力以及混合料的和易性、均匀性均有较大的影响[45]。传统的针片状颗粒测量方法为游标卡尺法[6],该方法费时费工,试验过程单一、枯燥,且准确率受人为因素影响较大,效率极低[7]。
数字图像处理(Digital in Age Processing)技术是通过扫描仪、数码相机等图像采集设备,将连续的数字图像离散化为计算机可以处理的信息,并对信息进行各种操作处理,以达到某一效果[89]。数字图像处理技术具有可利用信息量大、经济方便和形象化存储等优点,且准确率高,不易受人为因素影响[10]。
ImagePro Plus图像分析处理软件支持图像采集、增强、标定、计数、测量分析和宏记录等功能,还有VB宏编程扩展功能[10]。……
