POSITION MONITORING SYSTEM, AND POSITION MONITORING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a position monitoring system capable of accurately measuring the position of a lift-up structure. SOLUTION: This position monitoring system comprises a scale 115 for height measuring and a camera 113 that displace relatively vertically in response to lifting of the lift-up structure 1 along a guide column 11. The scale 115 for height measuring has a template image showing a vertical direction position and extends in the vertical direction. The camera 113 photographs the scale 115 for height measuring. The position monitoring system has a computer for calculating the vertical direction position of the lift-up structure 1 based on the position of the template image in the image photographed by the camera 113. COPYRIGHT: (C)2009,JPO&INPIT