METHOD AND DEVICE FOR DETECTING POSITION OF COLUMNAR OBJECT

PROBLEM TO BE SOLVED: To easily detect a position of a columnar object by calculating its specific direction center coordinate and width from a specific direction distance distribution data of both end surfaces of the columnar object by light or ultrasonic wave and reflecting light or reflecting wave thereof. SOLUTION: An arithmetic control part 40 is built in with a microcomputer, to be electrically connected to a light receiving part 34. By a principle of trigonometrical survey method using a crossing angle between laser light 31 and reflecting light 33, a function calculating a distance to a coil stored is provided. A speed of a swing motor 35 and a ceiling crane 20 can be also controlled. A distance distribution data of Y-Z direction or the like of each coil 10, 11, 12, obtained by operating a distance meter 30, is once stored in a memory of the built-in microcomputer, and based on a data of the memory after completing scanning, data necessary for coil carrying by a crane 20, that is, a number of coils, size of each coil, each coil width and each coil center coordinate are calculated.