三次元画像解析によるコンクリート水路表面粗度の測定手法に関する研究  [in Japanese] Study on Measurement Method of Surface Roughness of Concrete Canal by Three Dimensional Image Processing  [in Japanese]

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Abstract

コンクリート水路の摩耗は,水理性能の指標である粗度係数に影響を与える可能性があり,機能保全には水路通水面の情報収集が必要となる.本報では,コンクリート水路表面状態の簡易で統一的な数値情報の取得を目的として,デジタルスチールカメラで撮影した画像を三次元化し,得られた数値データの再現性及び推定した粗度係数の妥当性について検討した.模型板を対象とした検討結果から,レーザー変位計で測定した二次元の実測値と比較し,画像解析結果の再現性が良好なことを明らかにした.カメラの有効画素数は,凹凸の再現性に影響し,画素数の大きい方の再現性が高かった.また,有効画素数に関わらず,換算粗度係数はほぼ同じ値となった.実コンクリート水路を対象とした解析結果から,表面形状を精度よく再現できることを確認した.

There is a possibility of influencing the roughness coefficient of abrasion concrete canal that is the index of the hydraulic performance. Therefore, it is necessary to figure out surface roughness of the canal to recognize the hydraulic performance. In this report, using the three dimensional image of canal surface by image analysis software, from the picture taken with the digital still camera, with the aim of figure out the surface roughness that obtained a simple, united value of concrete canal. From the image analysis result, the model version was able to reproduce the canal surface asperity excellently, compared with the actual value measured by the laser displacement sensor. The camera pixel affected to surface asperity reproducibility, however, the calculated roughness coefficient from three dimensional image was not affected by difference of camera pixel count. Moreover, from the result of the three dimensional image, taken a picture at real concrete canal, it is able to obtain asperity of concrete canal surface with good accuracy.

Journal

  • Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

    Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 80(4), 311-317, 2012-08-25

    The Japanese Society of Irrigation, Drainage and Rural Engineering

References:  6

Codes

  • NII Article ID (NAID)
    10031171437
  • NII NACSIS-CAT ID (NCID)
    AA12240517
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    18822789
  • NDL Article ID
    023958697
  • NDL Call No.
    Z18-365
  • Data Source
    CJP  NDL  J-STAGE 
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