| 摘要 |
<p>By means of the present invention, it is possible to highly precisely detect so-called defects and so-called top waves where a portion of the top surface of a bottle mouth section dimples in a wavy shape. Two points (A, B) on the top surface of the bottle mouth section are detected from an image of the mouth section captured by an imaging means, the line segment (c) having points A and B at both ends is determined, the point (D) of intersection between the top surface of the mouth section and a vertical line (d) passing through any given intermediate point (C) of the line segment (c) is determined, the difference (T) between the point (D) of intersection and the intermediate point (C) is calculated, and whether the glass bottle is satisfactory or not is determined on the basis of the value of T. If there is a top wave at the top surface of the bottle mouth section, the difference between the intermediate point (C) of the line segment (c) and the point (D) of intersection of the vertical line (d) passing through C and the top surface of the bottle mouth section increases, and so by calculating the difference (T) between C and D, it is possible to determine if T is within a predetermined range that the product is satisfactory, and otherwise that the product is defective having the defect of a top wave.</p> |
