POSITION MEASUREMENT METHOD OF LONG-LENGTH MEMBER

• Main Authors: NAKAMURA ATSUSHI, ONO KANTA, HOSONO HIROMI, KAKEHASHI TAKAO, ASAI HIROTAKA, KOGA YUICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 02.02.2017
• Subjects: BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; FIXED CONSTRUCTIONS; FORMS; HANDLING BUILDING MATERIALS ON THE SITE; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING; TESTING

PROBLEM TO BE SOLVED: To provide a position measurement method of a long-length member which can efficiently measure a position of the long-length member in an axial line direction.SOLUTION: A reference point frame 5 having a plurality of reference points 6 is disposed in the vicinity of a position in which a long-length member 3 having a prescribed length in a center axial line direction is disposed at the substantially same cross section. Three points in which separation distances between the reference points are known and the long-length member are photographed by digital cameras 4a and 4b from two different points so that three points and the long-length member are imprinted. A relative positional relation between the respective photographing positions and the reference points is specified from a position of the reference point which is imprinted into the photographed image, and a relation between a plurality of positions on a surface of the long-length member is calculated from the two images. A position of a center axial line is calculated at a plurality of positions along an axial line from the calculate position of the surface on the basis of a cross section shape of the long-length member. The calculated position of the center axial line is compared with a scheduled arrangement position of the long-length member, and displayed in a chart.SELECTED DRAWING: Figure 1 【課題】軸線方向に長い部材の位置を効率よく計測することができる長尺部材の位置計測方法を提供する【解決手段】ほぼ同じ断面で中心軸線方向に所定の長さの長尺部材３が配置された位置付近に、複数の基準点６を設けた基準点フレーム５を設置する。これらの基準点の互いに離隔距離が知られた３点と長尺部材とを写し込むように、２つの異なる位置からデジタルカメラ４ａ，４ｂで撮影する。撮影された画像に写し込まれた基準点の位置から、それぞれの撮影位置と基準点との相対的な位置関係を特定し、長尺部材の表面における複数の位置との関係を、２つの画像から演算する。演算された表面の位置から該長尺部材の断面形状に基づいて中心軸線の位置を軸線に沿った複数の位置で演算する。演算された中心軸線の位置は該長尺部材の計画配置位置と対比し、図化して表示する。【選択図】図１