POSITION MEASURING SYSTEM, COMPUTATION DEVICE FOR POSITION MEASUREMENT AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a position measuring system determining the three-dimensional position of an acting part using basic markers disposed in different regions even when the region including the acting part is rotated or hidden, a computation device for position measurement and a program.SOLUTION: The position measuring system includes a marker set 5 having three or more basic markers attached to a front arm 2 in a known positional relationship; an image-taking device 6 having a two-dimensional image-taking element for taking an image of the marker set 5; a recording device 7 for recording the coordinate of an acting part 10 with respect to the marker set 5; and a computation device 8 for computing the three-dimensional position of the acting part 10 by using the position and angle of the marker set 5 determined based on the image of the marker set 5 taken by the image-taking device 6 and the coordinate of the acting part 10 with respect to the marker set 5 recorded in the recording device 7.