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首页> 外文会议>Conference on sensors and smart structures technologies for civil, mechanical, and aerospace systems >Detection of flaws on surface of civil infrastructures and their profiling using imaging system with laser displacement sensor
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Detection of flaws on surface of civil infrastructures and their profiling using imaging system with laser displacement sensor

机译：使用带激光位移传感器的成像系统检测民用基础设施表面的缺陷并进行轮廓分析

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Civil infrastructures such as buildings, bridges, roads and pipelines are the integral part of people's lives and their failure can have large public safety and economic consequences. Early detection of flaws in civil infrastructures and their appropriate retrofitting will aid in preventing this failure. Flaws such as cracks and impact damages initially occur on the surface and propagate inside the materials causing further degradation. There is a need to develop systems that can detect these surface flaws. Developing a system with one sensing technique which can detect the flaws is a challenging task since infrastructures are made up of diverse materials such as concrete, metal, plastics, composite and timber that have different electrical and mechanical properties. It is also desired that non-plain surfaces with complex profiles can be interrogated and surface flaws can be detected. We have proposed an imaging system capable of interrogating structures with complex surface profiles for the purpose of detection and evaluation of surface flaws such as cracks and impact damages using laser displacement sensor (LDS). The developed system consists of LDS mounted on the scanner which is able to perform raster scan over the specimen under test. The reading of displacement from the sensor head to the laser spot on the surface of the test material is then used to generate images which can be used to detect the surface flaws. The proof of concept is given by testing specimens made of metal, concrete and plastics with complex surface profiles.
机译：诸如建筑物，桥梁，道路和管道之类的民用基础设施是人们生活中不可或缺的一部分，它们的失败会给公共安全和经济带来巨大后果。尽早发现民用基础设施中的缺陷并对其进行适当的改造将有助于防止这种故障。诸如裂纹和冲击损伤之类的缺陷最初出现在表面上，并在材料内部传播，从而导致进一步的退化。需要开发可以检测这些表面缺陷的系统。用一种可以检测出缺陷的传感技术来开发系统是一项艰巨的任务，因为基础设施是由具有不同电气和机械特性的各种材料构成的，例如混凝土，金属，塑料，复合材料和木材。还希望可以查询具有复杂轮廓的非普通表面，并可以检测到表面缺陷。为了使用激光位移传感器（LDS）检测和评估诸如裂纹和冲击损伤的表面缺陷，我们提出了一种能够询问具有复杂表面轮廓的结构的成像系统。开发的系统由安装在扫描仪上的LDS组成，该LDS能够对被测样品进行光栅扫描。从传感器头到测试材料表面上激光点的位移读数然后用于生成可用于检测表面缺陷的图像。通过测试由金属，混凝土和塑料制成的具有复杂表面轮廓的标本，可以提供概念证明。

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