| 摘要 |
PURPOSE:To simplify and speed up the operation by a process, wherein a spotlight is projected on an optional position where an object is photographed by a pair of television cameras, the mark within the field of vision is made to agree with said spot to find the range to the object. CONSTITUTION:In the state of the stopped reclaimer 10 a material pile 14 is reflected within the field of vision 28a and 28b of the monitor TV 26a and 26b. By means of a spot mark projector 40 spot makk Q is formed in the lighting position of the material pile 14. The cross marks 30a and 30b are moved to agree with said spot mark Q. The coordinates for the centers of the field of vision O and O' of the cross marks 30a and 30b are read, the directions of the TV cameras 20a and 20b are controlled according to said coordinate position and according to the length l of the base line between said magnetic declination and the cameras the range to the spot mark Q is automatically found. In this way the operation is done easily as well as quickly. |
