Title:
変状検出装置及び変状検出プログラム
Document Type and Number:
Japanese Patent JP6687969
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a state change detection apparatus and a state change detection program which are capable of evaluating the occurrence state of a state change in an object to be detected effectively and quantitatively.SOLUTION: A lattice pattern 5A is formed on the surface of bridge girder where the occurrence of a state change is expected. On the basis of a photographed image of a region to be detected Awhere the lattice pattern 5A exists, displacement in the region to be detected Abefore/after the occurrence of the state change is calculated by a sampling moire method. A photographed image dividing part divides the photographed image of the region to be detected Ainto a plurality of regions Ato A, and a relative displacement calculating part calculates relative displacement for each of a plurality of the regions Ato A. A relative displacement difference calculating part calculates a difference of relative displacement between a plurality of the regions Ato A, and when the difference of the relative displacement exceeds a threshold value, a state change detection part detects that state change occurs between a plurality of the regions Ato A. The difference of the relative displacement is considered to be the width of the crack, and a visualized image generation part generates a contour diagram corresponding to the width of the crack.SELECTED DRAWING: Figure 5
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Inventors:
Shintaro Minoura
Tokunaga Munemasa
Tsutomu Watanabe
Fumiaki first half
Ryo Nagai
Nimura Takafusa
Tokunaga Munemasa
Tsutomu Watanabe
Fumiaki first half
Ryo Nagai
Nimura Takafusa
Application Number:
JP2016148475A
Publication Date:
April 28, 2020
Filing Date:
July 28, 2016
Export Citation:
Assignee:
Railway Technical Research Institute
Kurashiki Spinning Co., Ltd.
Kurashiki Spinning Co., Ltd.
International Classes:
G01B11/25; G01N21/95
Domestic Patent References:
| JP8297020A | ||||
| JP2009236754A | ||||
| JP2015141151A | ||||
| JP2016020891A | ||||
| JP2011180048A |
Foreign References:
| WO2015159469A1 | ||||
| US20150015894 |
Other References:
車谷麻緒,ほか3名,コンクリートのひび割れ進展計測のための画像解析手法に関する基礎的研究,土木学会論文集A2(応用力学),日本,2014年,70巻2号,135-144
Attorney, Agent or Firm:
Taketo Okuma