Aplicación del Láser Escáner Terrestre (TLS) a la modelización de estructuras: precisión, exactitud y diseño de la adquisición de datos en casos reales

Ramos, Lilian Sandra Miranda; Marchamalo, Miguel; Rejas, Juan Gregorio; Martínez, R.

doi:10.3989/ic.13.103

Cited by 11 publications

(13 citation statements)

References 2 publications

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“…Based on Figure 1 and the conclusions of the study [10], it was expected to obtain differences below 4 mm between the movements given by the pendulums and the ones obtained from the point clouds of the last three campaigns. It was enough making a single station to cover the whole facing of the dam which is certainly important because it reduces the time for data collection and also eliminates some part of the back office work: the recording of 3D point clouds taken from different stations.…”

Section: Figure 1 Test Dam Place Of the Five Fixed Stations And Of Tmentioning

confidence: 85%

“…In the analysis of the results of this work, the findings of the study about equipment characterization and the design of data acquisition campaigns in real cases, already mentioned [10], have been taken into account. In that study, a graphic pattern dispersion/precision is proposed from which ranges of values of "distance-beam incidence angle" can be obtained to ensure precision values below a certain value.…”

Section: Figure 1 Test Dam Place Of the Five Fixed Stations And Of Tmentioning

confidence: 99%

“…The same can be said about the differences between the four positions of Table 2 Errors, mean and standard deviation of the data obtained from TLS in each campaign (mm) the pendulums in the same campaign, which is currently under study. An advance was presented in the study of 2013 [10].…”

Section: Figure 9 Radial Movements At Dam Crest At Pendulum-4 Locatiomentioning

confidence: 99%

“…• How to characterize a TLS equipment for its right choice to measuring seasonal movements of dams [10].…”

Section: Introductionmentioning

confidence: 99%

“…• Implementing TLS equipment characterization for the correct determination of the station points downstream of the dam, in each case [10].…”

Section: Introductionmentioning

confidence: 99%

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Comparing dam movements obtained with Terrestrial Laser Scanner (TLS) data against direct pendulums records

Ramos-Alcázar

Marchamalo

Marín

2015

Rev. Fac. Ing. Antioquia

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ABSTRACT:The results of the study carried out in a gravity-arch dam to measure its seasonal movements with TLS are presented. These values are compared with radial movements of the dam crest recorded by direct pendulums. The results show differences, only few millimeters, being the best result one millimeter discrepancy. The factors that have been considered are the precision and accuracy of the equipment, distance and angle of incidence of the laser beam, the density of the point cloud and the size of the triangles of the meshes. Considerations about density of point clouds and size of triangular meshes are made. In this study, a 7 cm distance between points and a 20 cm mesh size have given good results. Finally, a methodology is proposed to compare by reference to one of the meshes. RESUMEN:En este artículo se presentan los resultados del estudio llevado a cabo en una presa de arco-gravedad, presa para medir sus movimientos estacionales con datos TLS. Estos valores se comparan con los movimientos radiales en coronación de la presa registrados por péndulos directos. Los resultados muestran diferencias en milímetros, siendo el mejor del orden de un milímetro. Los factores que se han considerado son la precisión y la exactitud de los equipos, la distancia y el ángulo de incidencia del rayo láser, la densidad de la nube de puntos y el tamaño de los triángulos de las mallas. Se hacen consideraciones acerca de la generación de nubes de puntos y mallas de triángulos. En este estudio, 7 cm de distancia entre puntos y 20 cm de tamaño de las mallas han dado buenos resultados. Por último, se propone una metodología para hacer estas comparaciones por referencia a una de las mallas.

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Section: Figure 1 Test Dam Place Of the Five Fixed Stations And Of Tmentioning

confidence: 85%

Section: Figure 1 Test Dam Place Of the Five Fixed Stations And Of Tmentioning

confidence: 99%

Section: Figure 9 Radial Movements At Dam Crest At Pendulum-4 Locatiomentioning

confidence: 99%

“…• How to characterize a TLS equipment for its right choice to measuring seasonal movements of dams [10].…”

Section: Introductionmentioning

confidence: 99%

“…• Implementing TLS equipment characterization for the correct determination of the station points downstream of the dam, in each case [10].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparing dam movements obtained with Terrestrial Laser Scanner (TLS) data against direct pendulums records

Ramos-Alcázar

Marchamalo

Marín

2015

Rev. Fac. Ing. Antioquia

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Application of Object Detection Algorithm for Efficient Damages Identification of the Conservation of Heritage Buildings

Tang,

Feng,

Wang

et al. 2024

Archaeological Prospection

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Heritage buildings are crucial for any area's cultural and political aspects. Proper maintenance and monitoring are essential for the conservation of these buildings. However, manual inspections are time‐consuming and expensive. We propose a deep learning–based detection framework to identify the damages on the ancient architectural wall. The algorithm applied in this study is YOLOv5. Comparing its five different versions, it was decided to use YOLOv5m as the most accurate detection algorithm with a mAP of 0.801. The damage types identified are physical weathering and visitors' scratches. High‐resolution images were selected for the experiment and effectively identified image. In addition, the applied algorithm allows real‐time detection and the identification of seasonal sources of disruption, which is proved by the video test in this study. The findings contribute to the development of an intelligent tool for health monitoring with the goal of fast and remote damage detection in the routine maintenance of heritage buildings.

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HBIM. Parametric Families from Point Clouds in Heritage Elements

Miranda

Chorro

Sánchez-Fernández

et al. 2020

Lecture Notes in Mechanical Engineering

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Aplicación del Láser Escáner Terrestre (TLS) a la modelización de estructuras: precisión, exactitud y diseño de la adquisición de datos en casos reales

Cited by 11 publications

References 2 publications

Comparing dam movements obtained with Terrestrial Laser Scanner (TLS) data against direct pendulums records

Comparing dam movements obtained with Terrestrial Laser Scanner (TLS) data against direct pendulums records

Application of Object Detection Algorithm for Efficient Damages Identification of the Conservation of Heritage Buildings

HBIM. Parametric Families from Point Clouds in Heritage Elements

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