METHOD AND DEVICE FOR SETTING REFERENCE LINE

PROBLEM TO BE SOLVED: To provide a method for setting a reference line for use in accurately and stably fixing a vibration-preventing bar in a short time.SOLUTION: An intersection point of a tube plate 5 disposed at an end 2a of a body 2 of a steam generator and a normal 2x on the surface of the tub...

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Bibliographic Details
Main Authors IMOTO HARUTAKA, DEGASHIRA NOBUYUKI
Format Patent
LanguageEnglish
Published 27.09.2012
Subjects
GYROSCOPIC INSTRUMENTS
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR POWER PLANT
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
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Summary:PROBLEM TO BE SOLVED: To provide a method for setting a reference line for use in accurately and stably fixing a vibration-preventing bar in a short time.SOLUTION: An intersection point of a tube plate 5 disposed at an end 2a of a body 2 of a steam generator and a normal 2x on the surface of the tube plate 5 represents the origin point of a coordinate system. A method includes the step of setting at least three reference points 50 around the normal 2x at positions closer to the other end 2b of the body 2 than the origin point, and measuring the coordinates of the reference points 50 in the coordinate system; the step of defining the coordinates of the points on the normal 2x positioned at the other end 2b based on the coordinates of the reference points 50 for setting a reference line which overlaps the coordinates and is orthogonal to the normal 2x, and calculating the coordinates of the two points which overlap the reference line; and the step of causing laser light passing through the coordinates of the two points to be emitted.
Bibliography:Application Number: JP20110046201