TLS data for cracks detection in building walls

The research programme included two stages, the laboratory and the field, so the datasets are divided into two groups of data. During both measurement stages, a phase-shift (PS) scanner Z + F 5016 IMAGER (manufactured in 2019) was used. In the laboratory stage, a specimen of white silicate with ten grooves with widths from 1 mm to 10 mm was scanned. The specimen was tested from four distances, and at five angles of incidence for each of these distances, as follows: - 5 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) - 10 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) - 15 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) - 20 m (0 gon, 20 gon, 40 gon, 60 gon, and 80 gon) Such a measurement scheme provided twenty different ‘geometric’ measurement conditions. For the field tests, three real buildings with poor technical conditions (with cracks of different widths and depths) were used. In this stage, four of the above-mentioned measurement conditions were verified. For the post-processing of datasets and mapping of results, the open-source CloudCompare software was used. The structure of the name of the files is as follows: XXgonYYm.bin - where XX stands for the angle of incidence [gon], and YY stands for the distance in meters from TLS to target [m].本研究项目涵盖实验室与野外两个阶段，因此数据集分为两组。两个测量阶段均采用Z + F 5016 IMAGER型相移（phase-shift, PS）扫描仪（2019年量产型号）。 实验室阶段中，研究人员对带有10条槽缝的白色硅酸盐试样进行扫描，该试样的槽缝宽度介于1 mm至10 mm之间。测试分别从4种不同距离开展，且针对每种距离设置5个入射角度，具体如下： - 5米（0 gon、20 gon、40 gon、60 gon、80 gon） - 10米（0 gon、20 gon、40 gon、60 gon、80 gon） - 15米（0 gon、20 gon、40 gon、60 gon、80 gon） - 20米（0 gon、20 gon、40 gon、60 gon、80 gon） 该测量方案共计提供20种不同的"几何测量工况"。 野外测试阶段则选用3座技术状况欠佳的真实建筑物作为测试对象，这些建筑物带有不同宽度与深度的裂缝，并验证了上述4种测量工况。 数据集后处理与结果制图采用开源软件CloudCompare完成。 文件命名规则如下：XXgonYYm.bin，其中XX代表入射角度（单位：gon），YY代表地面激光扫描仪（Terrestrial Laser Scanner, TLS）至测试目标的距离（单位：米）。