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JRM Vol.35 No.1 pp. 65-73
doi: 10.20965/jrm.2023.p0065
(2023)

Development Report:

Development of Automatic Inspection Systems for WRS2020 Plant Disaster Prevention Challenge Using Image Processing

Yuya Shimizu, Tetsushi Kamegawa, Yongdong Wang, Hajime Tamura, Taiga Teshima, Sota Nakano, Yuki Tada, Daiki Nakano, Yuichi Sasaki, Taiga Sekito, Keisuke Utsumi, Rai Nagao, and Mizuki Semba

Okayama University
3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan

Received:
July 20, 2022
Accepted:
November 20, 2022
Published:
February 20, 2023
Keywords:
WRS2020, image processing, auto inspection, YOLO, OCR
Abstract

In this article, an approach used for the inspection tasks in the WRS2020 Plant Disaster Prevention Challenge is explained. The tasks were categorized into three categories: reading pressure gauges, inspecting rust on a tank, and inspecting cracks in a tank. For reading pressure gauges, the “you only look once” algorithm was used to focus on a specific pressure gauge and check the pressure gauge range strings on the gauge using optical character recognition algorithm. Finally, a previously learned classifier was used to read the values shown in the gauge. For rust inspection, image processes were used to focus on a target plate that may be rusted for rust detection. In particular, it was necessary to report the rust area and distribution type. Thus, the pixel ratio and grouping of rust were used to count the rust. The approach for crack inspection was similar to that for rust. The target plate was focused on first, and then the length of the crack was measured using image processing. Its width was not measured but was calculated using the crack area and length. For each system developed to approach each task, the results of the preliminary experiment and those of WRS2020 are shown. Finally, the approaches are summarized, and planned future work is discussed.

A result in WRS by our proposed method

A result in WRS by our proposed method

Cite this article as:
Y. Shimizu, T. Kamegawa, Y. Wang, H. Tamura, T. Teshima, S. Nakano, Y. Tada, D. Nakano, Y. Sasaki, T. Sekito, K. Utsumi, R. Nagao, and M. Semba, “Development of Automatic Inspection Systems for WRS2020 Plant Disaster Prevention Challenge Using Image Processing,” J. Robot. Mechatron., Vol.35 No.1, pp. 65-73, 2023.
Data files:
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