STAFF GAUGE AND LEVEL MEASURING APPARATUS USING IT

摘要

PROBLEM TO BE SOLVED: To obtain a level measuring apparatus by which a level is measured with high accuracy by suppressing the vibration or the deformation of a tilting plate when the image of the tilting plate installed in a level measuring place is imaged so as to find the level on the basis of the image of the tilting plate. SOLUTION: A staff gauge 3 is constituted of at least two columns 4 which are erected and installed in a level measuring place, of tilting plates 5 which are fixed to the columns 4 and which are installed so as to be tilted with reference to the columns 4 and of a plurality of reinforcing materials 6 which fix the two columns 4. The respective reinforcing materials 6 are installed at equal distances in the up-and-down direction. The level contact place of the staff gauge 3 is imaged by an imaging means from a distant place, an imaged image is processed, and a level position is found on the basis of images of the tilting plates 5. Since the columns 4 are reinforced by the plurality of reinforcing materials 6, the deformation or the vibration of the tilting plates 5 is suppressed.