| 摘要 |
PROBLEM TO BE SOLVED: To enable recognition of a tunnel pit face and other obstacles that an upper machinery could come into contact with during a slewing operation, including the height position.SOLUTION: A plurality of first cameras 13 for forming overview images is installed on an upper machinery 3, to have a synthetic overview image 20 displayed on a display 15, the first cameras photographing images diagonally downward from various directions. Also installed are second cameras 16R, 16L that photograph slewing images, the second cameras including in its visual field range a corner part of the upper machinery 3 covering from a rear edge to a side part of the upper machinery. The second cameras are installed below a slewing frame 3a of the upper machinery 3 so that the second cameras rotate following a slewing motion of the upper machinery 3, to have corner part slewing images 30R, 30L superposed on the synthetic overview image 20 on the display 15.SELECTED DRAWING: Figure 7 |
