Kokusai Kogyo wins the 6th Infrastructure Maintenance Award “Excellence Award”

Kokusai Kogyo Co., Ltd.
Kokusai Kogyo wins the 6th Infrastructure Maintenance Award “Excellence Award”
Kokusai Kogyo Co., Ltd. (President: Satoshi Hijikata, hereinafter “Kokusai Kogyo”) won the Excellence Award in the ingenuity category at the maintenance site of the 6th Infrastructure Maintenance Awards sponsored by the Ministry of Land, Infrastructure, Transport and Tourism.
The award-winning initiative is “efficient three-dimensional measurement of port facilities using narrow multi-beam laser scanners and UAVs.”
The Infrastructure Maintenance Award “commends excellent efforts and technological developments related to the maintenance of social capital in Japan, and introduces them widely as good examples to promote the efforts of business operators, organizations, researchers, etc. involved in infrastructure maintenance in Japan. It will be implemented with the aim of promoting the maintenance industry, and disseminating the philosophy of infrastructure maintenance. (Excerpt from Ministry of Land, Infrastructure, Transport and Tourism website) ■Outline of initiatives
“Efficient 3D measurement of harbor facilities using narrow
multi-beam, laser scanner, and UAV”
At the offshore outer facilities installed to maintain the calmness of the harbor, high waves caused by typhoons and seasonal winds cause deformation such as sliding and subsidence of the main body of the structure, subsidence and scattering of the wave dissipating works. This method acquires 3D data using a safe method (on land: UAV and laser scanner combined, underwater: narrow multi-beam) for checking the current status of port facilities (crown height, deformation, etc.). It is a method that has been worked on for the purpose of achieving efficiency, quantification, and visualization of maintenance management, and contributes to appropriate maintenance and repair and longevity of port facilities and work safety.
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Overall image of the initiative
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Left: Laser scanner measurement   Right: Narrow multi-beam depth sounding

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Point cloud display
■Reason for award
Since there is no need for surveying work on the wave-dissipating block or diving work, it is possible to improve the efficiency and safety of field work, and it is possible to supplement unmeasured areas with UAV photogrammetry It was evaluated as an initiative that realizes efficiency, quantification, and visualization of maintenance and maintenance, and contributes to appropriate maintenance, repair, and longevity.
■ Points of efforts
Avoiding survey work and diving work on the wave-dissipating block not only improves the efficiency of field work, which has been affected by weather and sea conditions, but also greatly improves work safety. In addition, the method of measuring the land part from the breakwater with a laser scanner and the underwater part with a narrow multi-beam has the problem that the sea side of the wave-dissipating block is an unmeasured area. In order to solve this problem, by interpolating with aerial photographs in combination with UAV photogrammetry, it was possible to eliminate unmeasured areas. As a result, it has become possible to create highly objective current state materials from 3D topographic data and photographs obtained using this method. Kokusai Kogyo will continue to contribute to the realization of a sustainable society by using positioning technology using various sensors.
▼ Reference site
Ministry of Land, Infrastructure, Transport and Tourism press release https://www.mlit.go.jp/report/press/content/001574213.pdf
List of winners https://www.mlit.go.jp/report/press/content/001574214.pdf Details about this release:



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