| 摘要 |
PURPOSE: A structure variation measuring system and method thereof are provided to can always measure a displacement in any external circumstances all the time because point positions can be inside of a screen by controlling a direction of the lasers irradiated for measuring a displacement of a structure. CONSTITUTION: A structure variation measuring system and method thereof comprise a laser scanner(413), a second laser scanner(423), a first camera(415), a second camera(425), and a control module. The first laser scanner is installed in a first structure and projects a laser beam to a second screen(421) attached on a second structure. The second laser scanner is installed in the second structure and projects the laser beam to a first screen(411) attached on the first structure. The first camera takes a photograph of the first screen, thereby creating a first image. The second camera takes a photograph of the second screen, thereby creating a second image. The control module controls a glancing angle of the first laser scanner so that the projected laser beam from the first laser scanner is projected to inside of the second screen. The control module controls a glancing angle of the second laser scanner so that the projected laser beam from the second laser scanner is projected to inside of the first screen. The control module presumes a relative displacement of the first structure with respect to the second structure by using the first and second images.
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