Proposal of Non Contact Inspection Method for Concrete Structures Using High-Power Directional Sound Source and Scanning Laser Doppler Vibrometer
Proposal of Non Contact Inspection Method for Concrete Structures Using High-Power Directional Sound Source and Scanning Laser Doppler Vibrometer
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DOI：
10.7567/jjap.52.07hc12
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发表时间：
2013-07-01
影响因子：
1.5
通讯作者：
Katakura, Kageyoshi
中科院分区：
文献类型：
--
作者：
Akamatsu, Ryo;Sugimoto, Tsuneyoshi;Katakura, Kageyoshi
对建筑物、桥梁和隧道等混凝土结构进行维护是必要的，因为人们认为它们中的许多都显示出退化。作为定期检查，锤击试验是最常用的方法。然而，它有几个问题。其中一个问题是，人们无法到达的地方很难检查。因此，非接触式检测方法得到了发展。作为一种非接触式检测方法，我们提出了一个系统组成的高功率定向声源和扫描激光多普勒测振仪（SLDV）。在该方法中，空气传播的声波用于激励的混凝土墙，然后在混凝土墙上的振动速度的二维测量的SLDV。根据振动速度，可以检测出有缺陷的部件。在本文中，我们描述了两种类型的实验，我们所提出的方法的可行性。在这些实验中，混凝土墙试件，其中有人工缺陷，使用。从实验结果来看，我们证实了我们所提出的方法作为混凝土结构的非接触检测方法的有效性。(C)2013日本应用物理学会
Maintenance for concrete structures such as buildings, bridges, and tunnels is necessary, because it is thought that a lot of them show deterioration. As a periodic inspection, a hammering test is the most popular method. However, it has several problems. One of the problems is that it is difficult to inspect the places where people cannot reach. Therefore, non contact inspection methods have been developed. As a non-contact inspection method, we propose a system consisting of a high-power directional sound source and a scanning laser doppler vibrometer (SLDV). In this method, an air-borne sound wave is used for the excitation of a concrete wall, and then the vibration velocities on the concrete wall are measured two-dimensionally by the SLDV. From the vibration velocity, defective parts can be detected. In this paper, we describe two types of experiment on the feasibility of our proposed method. In these experiments, concrete wall test pieces, which have artificial defects, are used. From the experimental results, we confirmed the effectiveness of our proposed method as a non contact inspection method for concrete structures. (C) 2013 The Japan Society of Applied Physics