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    • 3. 发明申请
    • A METHOD AND DEVICE TO ASCERTAIN PHYSICAL CHARACTERISTICS OF POROUS MEDIA
    • 一种确定多孔介质物理特性的方法和装置
    • WO2003065017A2
    • 2003-08-07
    • PCT/GB2003/000447
    • 2003-01-31
    • ABERDEEN UNIVERSITYHURST, AndrewGRANDJEAN, ValerieKOVALCHUK, AlexanderPLAYER, MichaelWATSON, John
    • HURST, AndrewGRANDJEAN, ValerieKOVALCHUK, AlexanderPLAYER, MichaelWATSON, John
    • G01N15/08
    • G01N33/24G06T7/0002G06T7/0004G06T7/41G06T7/586G06T7/62
    • The present invention relates to a method and device for ascertaining characteristics relating to porosity and grain size in rock sample. Four illuminators A, B, C and D direct collimated illuminating beams to a point O at the centre of a sample 40 and have projections onto the plane of the surface of the sample 40 at points A 1 , B 1 , C 1 , and D 1 . Angles 1 , 1 , 1 , and 1 have the same value of 45°. A camera (41) located directly above the point (O) acquires four images as the illuminators are individually illuminated. A processing section receives the acquired image data on line (42) and, after filtering, a common point distribution is evaluated based on the common points in the light intensity distribution data of two pairs of images with opposite illumination directions is found (A & C, B & D). At the same time, an edge enhancing distribution is evaluated based on the opposing value points in the light intensity distribution data for the opposing directions. These two distributions are combined and after thresholding, a binarised distribution is produced which is analysed using a measuring area to establish the relative amounts of one value or the other that occur in the distribution. From this, pore size distribution, grain size distribution and porosity of the sample can be found.
    • 本发明涉及用于确定岩石样品中与孔隙度和粒度有关的特征的方法和装置。 四个照明器A,B,C和D将准直照明光束引导至样品40中心处的点O,并且在点A 1,B,B处具有投影到样品40表面的平面上。 1,C 1,D 1和D 1。 角度< AOA 1,< BOB 1,< COC 1< 1>和< DOD 1具有 相同的值45°。 位于点(O)正上方的照相机(41)在照明器被单独照亮时获取四个图像。 处理部分在线(42)上接收所获取的图像数据,并且在滤波之后,基于具有相反照射方向的两对图像的光强分布数据中的公共点来评估公共点分布(A& C,B和D)。 同时,基于相对方向的光强度分布数据中的相对值点来评估边缘增强分布。 将这两种分布结合起来,并在阈值化之后产生二值化分布,其使用测量区域进行分析以建立分布中发生的一个值或另一个值的相对量。 由此可以发现样品的孔径分布,粒度分布和孔隙度。