| 摘要 |
<p>PURPOSE:To measure the utility pole from the ground non-destructively to know the curving degree quantitatively and diagnose the healthiness of the utility pole. CONSTITUTION:The whole image of a utility pole is photographed with a camera 1, A/D conversion is carried out with a converter 2, and the results are sent to a computing apparatus 3. The computing apparatus 3 calculates the outline of the utility pole by image processing and an assumed straight line and a bent line consisting of a first straight line and a second straight line with different tilt and length are calculated based on the maximum value of the addition value of the density values of respective lines which overlap with the image of the outline of the utility pole wherein the assumed straight line has the largest overlapping degree with the outline of the utility pole and the bent line has the largest overlapping degree and is near the assumed straight line. By comparing the overlapping degrees of both lines, the curving of the utility pole 20 is calculated and evaluated mathematically and geometrically. In this way, independently of a measuring person, quantitative measurement of the curving degree of a utility pole is made possible and the easy and speedy non-destructive measurement can be carried out from the ground.</p> |
