DEVICE FOR MEASURING LIST OF SPREADER

摘要

PURPOSE: A list measuring apparatus for a spreader is provided to control the position of the spreader by detecting the list angle of the crane spreader accurately with sensing image of linear elements. CONSTITUTION: A list measuring system for a spreader is composed of an image detecting pattern(110) having plural linear elements arranged in parallel on the spreader; a camera(120) installed vertically in the upper part of the image detecting pattern to reduce or enlarge the image according to the distance from the image detecting pattern with a zoom unit; a distance measuring unit providing vertical distance information between the camera and the upper face of the spreader; a zoom controller(122) adjusting the zoom unit according to the vertical distance information from the distance measuring unit; and an angle output unit(170) calculating the list angle of the spreader corresponding to the gap between linear elements. The position of the spreader is controlled by measuring the list angle of the spreader accurately.