A Non-contact approach for cable tension evaluation based on 3D laser scanning data and nonlinear finite element analysis

Srimontriphakdi, Thaniyaphat; Mahasuwanchai, Peerasit; Athisakul, Chainarong; Leelataviwat, Sutat; Klaycham, Karun; Poovarodom, Nakhorn; Magteppong, Nuttaphon; Chucheepsakul, Somchai

doi:10.1016/j.measurement.2023.112680

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…The three-dimensional laser scanning method [16,17] is used to collect three-dimensional images of metal artefacts, and the normal information of point cloud model is used to realize three-dimensional reorganization of metal artefacts. Gradient cloud point information of three-dimensional feature points of metal artefacts is extracted, and the Laplace scale decomposition fusion formula for visual feature detection of three-dimensional reconstruction of metal artefacts is obtained by combining the depth and brightness analysis of colour space:…”

Section: Pretreatment Of Laser 3d Scanning More Features Of Metal Cul...mentioning

confidence: 99%

“…The three‐dimensional laser scanning method [16, 17] is used to collect three‐dimensional images of metal artefacts, and the normal information of point cloud model is used to realize three‐dimensional reorganization of metal artefacts. Gradient cloud point information of three‐dimensional feature points of metal artefacts is extracted, and the Laplace scale decomposition fusion formula for visual feature detection of three‐dimensional reconstruction of metal artefacts is obtained by combining the depth and brightness analysis of colour space:

\begin{equation}{W}^{ij}(x,y) = \frac{{{G}^{ij}(x,y)}}{{\sum\nolimits_{i = 1}^{{n}_x} {\sum\nolimits_{j = 1}^{{n}_r} {{G}^{ij}(x,y) + \varepsilon } } }}\end{equation}

where

x,y

represents the distribution coordinates of three‐dimensional pixel points of metal cultural relics laser,

{G}^{ij}(x,y)

is the significant parameter of the internal structure of metal cultural relics,

({x}^{ij},{y}^{ij})

is the template feature matching value of metal cultural relics image under the window size,

{n}_x,{n}_r

are the optimal three‐dimensional visual feature quantity of metal cultural relics laser and ε respectively represents the global contrast information of metal cultural relics visual image.…”

Section: Construction and Preprocessing Of Feature Point‐to‐line Mode...mentioning

confidence: 99%

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Optimization method of 3D reconstruction of metal cultural relics based on 3D laser scanning data reduction

Chen,

Wang,

Ding

2023

The Journal of Engineering

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The extraction effect and feature matching are poor in the three‐dimensional reconstruction of metal cultural relics, which leads to a poor reconstruction effect. Therefore, an optimization method of three‐dimensional reconstruction of metal cultural relics based on 3D laser scanning data reduction is proposed. The overall technical design route of the method is shown as follows. Based on this model, the 3D laser scanning method is used to collect 3D images of metal artefacts, combined with colour space and 2D entropy detection methods to pre‐process 3D images, and feature matching of point clouds is carried out to extract and optimize the significant value of superpixels, and a 3D reconstructed visual model is constructed. Affine transformation is used to obtain the affine invariant moment of the structural light parameters of the visual feature lines of metal cultural relics. The light stability adjustment of the three‐dimensional reconstruction of metal cultural relics is realized by using the linear structural light adjustment method in the HSV colour space. The rigid and non‐rigid registration methods are introduced to match the point cloud. The product quantization algorithm is used to linearize the error function, and the block feature detection and matching model of spatial image is obtained. The noise number is judged by the threshold value, and the three‐dimensional reconstruction technology is combined to realize the three‐dimensional reconstruction of metal relics. The simulation results show that this method has good visual expression ability, high feature recognition rate, and improves the three‐dimensional reconstruction ability of metal relics.

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Section: Pretreatment Of Laser 3d Scanning More Features Of Metal Cul...mentioning

confidence: 99%

\begin{equation}{W}^{ij}(x,y) = \frac{{{G}^{ij}(x,y)}}{{\sum\nolimits_{i = 1}^{{n}_x} {\sum\nolimits_{j = 1}^{{n}_r} {{G}^{ij}(x,y) + \varepsilon } } }}\end{equation}

where

x,y

represents the distribution coordinates of three‐dimensional pixel points of metal cultural relics laser,

{G}^{ij}(x,y)

is the significant parameter of the internal structure of metal cultural relics,

({x}^{ij},{y}^{ij})

is the template feature matching value of metal cultural relics image under the window size,

{n}_x,{n}_r

are the optimal three‐dimensional visual feature quantity of metal cultural relics laser and ε respectively represents the global contrast information of metal cultural relics visual image.…”

Section: Construction and Preprocessing Of Feature Point‐to‐line Mode...mentioning

confidence: 99%

Optimization method of 3D reconstruction of metal cultural relics based on 3D laser scanning data reduction

Chen,

Wang,

Ding

2023

The Journal of Engineering

View full text Add to dashboard Cite

show abstract

“…Comparing with 2D measurements' methods, 3D measurements can provide more comprehensive structural information, facilitating precise measurements at multiple angles. For example, Srimontriphakdi [8] proposed a non-contact method for evaluating the top tension and bending stiffness of large cable-stayed objects using three-dimensional laser scanning data from ground-based laser scanners. However, the disorder and sparsity of point cloud data result in a time-consuming measurement process, which highlights the need for a more efficient processing method.…”

Section: Introductionmentioning

confidence: 99%

Gap measurement method based on projection lines and convex analysis of 3D points cloud

Pan,

Jiang,

Tang

et al. 2024

Meas. Sci. Technol.

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Accurate measurement of the gap between the lower surface of the relay and the ground is critical for ensuring the quality of the finished product. Traditional gap measurement methods have some shortcomings, such as low accuracy, poor robustness, and loss of depth clues in obscured areas. In this study, a novel gap measurement method based on computer vision is proposed, which includes a projection line model based on guided filtering and a 3D surface point cloud model based on a three dimensional plane reference.- The relay gap was measured by calculating the projection lines of the upper and lower surfaces of the gap with an error of ±0.016 mm. A 3D point cloud model captures the key features of the underside of the relay through image processing techniques, and combines convex hull and centroid estimation to construct a three-dimensional reference plane for the gap, which could achieve high-precision, real-time measurement of the gap (with an error less than ±0.0087 mm). The experimental measurement results show that the proposed method is better than the SelfConvNet method, which has a high measurement accuracy and strong anti-interference ability, and an accuracy rate of up to 99.5% in factory relay quality inspection experiments.

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3D laser scanning for automated structural modeling and deviation monitoring of multi-section prefabricated cable domes

Zhang,

Ma,

Zhao

et al. 2024

Automation in Construction

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A Non-contact approach for cable tension evaluation based on 3D laser scanning data and nonlinear finite element analysis

Cited by 8 publications

References 40 publications

Optimization method of 3D reconstruction of metal cultural relics based on 3D laser scanning data reduction

Optimization method of 3D reconstruction of metal cultural relics based on 3D laser scanning data reduction

Gap measurement method based on projection lines and convex analysis of 3D points cloud

3D laser scanning for automated structural modeling and deviation monitoring of multi-section prefabricated cable domes

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