| 摘要 |
PURPOSE:To simplify the constitution of the title instrument and, at the same time, to eliminate the need of constituting the title instrument itself in an explosion-proof structure even when there is a possibility of a combustible gas which a stratum gives off by setting corner cubes which only reflect light on the main body side a shield as targets. CONSTITUTION:The title instrument is constituted of two corner cubes 5A and 5B set on the main body 2 of a shield, light emitter 12 which emits light towards the corner cubes 5A and 5B, camera device 13 which receives reflected light rays from the corner cubes 5A and 5B, and picture processor 14 which finds the center position of the corner cubes 5A and 5B by processing the picture received by means of the camera device 13, and arithmetic processor 15 which calculates the position and attitude of an object from the picture data obtained by means of the processor 14. |
