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1.
In this paper, white light digital image analysis in frequency domination area for measuring 3D displacement is put forward. The measuring system has the characteristics of wholefield, non-contact and omnibearing measurement. It is simple and the coherent light is not demanded. Gray images before and after deformation are recorded using two CCDs at two different shooting angles, then digitalized and analyzed by frequency domination correlation arithmetic. The 2D displacement obtained is used to formulate 3D displacement via mathematical transformation, The experimental plate is 40 mm in length, 30 mm in width and 10 mm in height. The definite displacement is given using a 3D precise adjusting frame. The 3D displacement is calculated and compared with the definite displacement. The error is 4%-11% and the availability of this method was certified. Using this method, the compression deformation of a thin-wall cylinder with 140 mm in height, 64 mm in inner diameter and 64,6 mm in external diameter, was also measured. This method is proper to measure dynamic deformation.  相似文献   

2.
数字图像分析方法在螺纹检测中的应用   总被引:3,自引:0,他引:3  
This paper describes the use of computer-aided measurement for external metric screw threads.Thread parameters,including thread pitch,thread angle,pitch giameter and major diameter,were measured with CCD cameras and image analysis software.New technologies such as digital image processing were used to increase the efficiency of measurements.In this study,by reconstructing the toolmaker‘s microscope,the computer-aided semi-automated measuring system was developed,which could evaluate the accuracy of screw thread fpofile.It is concluded that the measuement accuracy is comparable to that of traditional toolmaker‘s microscope method.  相似文献   

3.
分析现有几种凸轮升程误差测量方法的优、缺点后,提出一种基于图像处理的凸轮升程误差的非接触式测量新方法.理论分析和比较实验结果表明,该测量方法简便易行,测量精度较高,具有一定的应用价值.  相似文献   

4.
视觉测量是采用机器视觉精确测量和定位空间几何尺寸的技术,能够有效提高工业检测的精度和效率。运用基于HALCON和VC++混合编程方法开发了电子元件视觉测量软件工具,实现了测量图像采集与显示、视觉测量等核心算法及其功能;设计并构建了由工业数字摄像机、工业镜头、光源等仪器组成的电子元件视觉测量硬件平台,并依此对软件工具的可靠性和稳定性进行试验验证,结果表明系统检测速度快、检测精度达到预期技术指标。  相似文献   

5.
针对光学透镜的焦距和后焦距的测量问题,设计了一套由平行光管和自准直仪组成的检测系统。基于数字图像处理技术,解决了测量系统中的自动对焦和双缝图像间距检测两个关键技术问题。实验结果表明,焦距的测量误差小于0.14%,后焦距的测量误差小于0.21%,能够满足一般工业检测需求。  相似文献   

6.
用电子分析天平测量液体的表面张力系数   总被引:1,自引:0,他引:1  
阐述用电子分析天平测量液体表面张力系数的原理和方法.对液体表面张力系数测量公式进行分析讨论,指出某些文献中所给出的拉脱法测液体表面张力系数实验测量公式存在的问题.  相似文献   

7.
提出了一种由单幅图像得到目标物体深度信息的方法。该方法通过计算机图像处理技术获取相关的图像信息,再结合光学成像原理将所用数码相机的实际物理焦距和图像中目标物体的大小均效到135相机的标准上,由计算机编程计算得出目标与测量系统之间的相对位置关系。介绍了测量原理,推导出了参数计算公式。实验表明,此系统测量精度满足工程测量要求。  相似文献   

8.
探讨了一个基于Labview图像处理模块的微循环流速测量软件系统的构建,并提供了一种无须跟踪同一个血细胞来测量微循环血细胞流速的方法。  相似文献   

9.
针对圆弧金刚石砂轮磨损检测及砂轮修形的实际需要,通过研究圆弧金刚石砂轮的在位测量原理,设计相应的软硬件控制方案.利用KEYENCE公司LK-G1O高精度激光位移传感器,设计圆弧金刚石砂轮的精密在位检测系统,实现圆弧金刚石砂轮表面轮廓的精密检测.实验结果表明:该检测系统适用于圆弧金刚石砂轮精密测量和评价,为光学非球面磨削加工提供参数依据.  相似文献   

10.
报道了一种快速测量针状颗粒显微图象长宽比的方法,使用该方法统计意义上较原有方法的测量精度高,并在图象分析仪上实现了本算法  相似文献   

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