Thermal imaging dataset from buried ductile iron pipe inspected by in-pipe thermography under convective heating

This dataset presents a thermal imaging dataset from a buried ductile iron pipe that were in-pipe inspected by infrared thermography with convective heating by hot air to validate whether convective heating is a reliable way in detecting and characterising external corrosion of metallic underground utilities (manually milled flat bottom holes on the outer pipe wall representing corroded regions). A heat blower was set to 50 °C, and the hot air was blown into the pipe with a 400 mm diameter at a velocity of 0.8 m/s for approximately 140 seconds. The pipe is 1.5 m long with a wall thickness of 8 mm, with an initial temperature of 22.3 °C. 36 flat-bottom holes were milled on the outer pipe wall, spread in 6 circumferential rings and angular direction. Three types of milled shapes with three different lateral sizes of 75 mm, 50 mm, and 25 mm were designed with varying residual thickness ranging from 1.7 mm to 4.4 mm. A Tau2 infrared camera in tunnel-view (facing frontward) is used to record the thermal images at an 8.7 frames per second sampling rate. Finally, the dataset proposed consists of 1 sequence of 4446 images of 640 x 512 pixels.本数据集为一套地下球墨铸铁管的红外成像数据集，该管道通过红外热成像（infrared thermography）结合热风对流加热（convective heating）开展了管内检测，旨在验证热风对流加热是否可作为可靠方法，用于检测并表征地下金属公用设施的外腐蚀（在管道外壁手工铣削平底孔（flat-bottom holes）以模拟腐蚀区域）。实验中热风鼓风机设置为50℃，以0.8 m/s的流速、通过直径400 mm的风道将热空气吹入管内，持续时长约140秒。待测管体长1.5 m，壁厚8 mm，初始温度为22.3℃。研究人员在管道外壁铣削了36个平底孔，沿6个圆周环向与角向均匀布设。设计了3种铣削构型，对应75 mm、50 mm、25 mm三种横向尺寸，且各孔的残余壁厚范围为1.7 mm至4.4 mm不等。采用Tau2型红外相机（Tau2 infrared camera），以隧道视角（即朝前正对拍摄），以8.7帧/秒的采样速率录制热成像图像。最终本数据集包含1组序列，共计4446张分辨率为640×512像素的热图像。

搜集汇总

背景与挑战

背景概述

该数据集是一个用于评估对流加热检测地下球墨铸铁管道外部腐蚀可靠性的热成像数据集。数据集包含4446张热图像，记录了管道在加热和冷却过程中的热演化，管道外壁加工了36个模拟腐蚀的平底孔，具有不同尺寸和剩余厚度。