Pipeline plays a vital role in transporting fluids like oils, water, and petrochemical substances for longer distances. Based on the materials they carry</span><span style="white-space:normal;font-size:1...Pipeline plays a vital role in transporting fluids like oils, water, and petrochemical substances for longer distances. Based on the materials they carry</span><span style="white-space:normal;font-size:10pt;font-family:"">,</span><span style="white-space:normal;font-size:10pt;font-family:""> prolonged usage may cause the initiation of defects in the pipeline. These defects occur due to the formed salt deposits, chemical reaction happens between the inner surface and the transferring substance, prevailing environmental conditions, etc. These defects, if not identified earlier may lead to significant losses to the industry. In this work, an in-line inspection system utilizes the nondestructive way for analyzing the internal defects in the petrochemical pipeline. This system consists of a pipeline inspection robot having two major units namely the visual inspection unit and the power carrier unit. The visual inspection unit makes use of a ring-type laser diode and the camera. The laser diode serves as a light source for capturing good quality images of inspection. This unit is controlled by the Arduino in the power carrier unit which provides the necessary movement throughout the pipe. The inspected images captured by the camera are further processed with the aid of NI vision assistant software. After applying the processing function parameters provided by this software, the defect location can be clearly visualized with high precision. Three sets of defects are introduced in a Polylactide (PLA) pipe based on its position and angle along the circumference of the pipe. Further, this robot system serves as a real-time interactive image synchronization system for acquiring the inspected images. By comparing the actual and calculated defect size, the error percentage obtained was less than 5%.展开更多
在大多数国省道路场景下,基于计算机视觉的交调方式都面临着车型划分精细、道路交通参与者类型繁杂、噪声干扰多等,导致车型流量占比计算困难的问题。为此,本文提出了一种基于细粒度目标检测与跟踪的九型车识别框架,引入基于无锚框和密...在大多数国省道路场景下,基于计算机视觉的交调方式都面临着车型划分精细、道路交通参与者类型繁杂、噪声干扰多等,导致车型流量占比计算困难的问题。为此,本文提出了一种基于细粒度目标检测与跟踪的九型车识别框架,引入基于无锚框和密集特征采样的实时目标检测器(real-time models for object detection,RTMDet)作为检测模块来执行高效、精准的九型车检测任务;同时设计了一种具有任务针对性的感兴趣区域(region of interest,ROI)噪声抑制模块,用于过滤背景噪声和路面无效车辆。通过进一步与深度简单在线和实时跟踪(deep simple online and realtime tracking,DeepSort)框架集成,本文在检测和跟踪精度方面相较于主流方法都得到了提升,可以为二级交调任务提供精准、细粒度的道路流量信息。展开更多
文摘Pipeline plays a vital role in transporting fluids like oils, water, and petrochemical substances for longer distances. Based on the materials they carry</span><span style="white-space:normal;font-size:10pt;font-family:"">,</span><span style="white-space:normal;font-size:10pt;font-family:""> prolonged usage may cause the initiation of defects in the pipeline. These defects occur due to the formed salt deposits, chemical reaction happens between the inner surface and the transferring substance, prevailing environmental conditions, etc. These defects, if not identified earlier may lead to significant losses to the industry. In this work, an in-line inspection system utilizes the nondestructive way for analyzing the internal defects in the petrochemical pipeline. This system consists of a pipeline inspection robot having two major units namely the visual inspection unit and the power carrier unit. The visual inspection unit makes use of a ring-type laser diode and the camera. The laser diode serves as a light source for capturing good quality images of inspection. This unit is controlled by the Arduino in the power carrier unit which provides the necessary movement throughout the pipe. The inspected images captured by the camera are further processed with the aid of NI vision assistant software. After applying the processing function parameters provided by this software, the defect location can be clearly visualized with high precision. Three sets of defects are introduced in a Polylactide (PLA) pipe based on its position and angle along the circumference of the pipe. Further, this robot system serves as a real-time interactive image synchronization system for acquiring the inspected images. By comparing the actual and calculated defect size, the error percentage obtained was less than 5%.
文摘在大多数国省道路场景下,基于计算机视觉的交调方式都面临着车型划分精细、道路交通参与者类型繁杂、噪声干扰多等,导致车型流量占比计算困难的问题。为此,本文提出了一种基于细粒度目标检测与跟踪的九型车识别框架,引入基于无锚框和密集特征采样的实时目标检测器(real-time models for object detection,RTMDet)作为检测模块来执行高效、精准的九型车检测任务;同时设计了一种具有任务针对性的感兴趣区域(region of interest,ROI)噪声抑制模块,用于过滤背景噪声和路面无效车辆。通过进一步与深度简单在线和实时跟踪(deep simple online and realtime tracking,DeepSort)框架集成,本文在检测和跟踪精度方面相较于主流方法都得到了提升,可以为二级交调任务提供精准、细粒度的道路流量信息。