Automatic Deformation Acquisition Using Terrestrial Laser Scanner

2011 ◽  
Vol 90-93 ◽  
pp. 2811-2817 ◽  
Author(s):  
Bao Xing Zhou ◽  
Jian Ping Yue ◽  
Ke Yong Jia
Keyword(s):  
Laser Scanning ◽  
High Spatial Resolution ◽  
Laser Scanner ◽  
Deformation Monitoring ◽  
Nurbs Surface ◽  
Surface Modelling ◽  
Object A ◽  
3D Information ◽  
Geodetic Surveying ◽  
Acquisition Method

Deformation monitoring is typically undertaken using spare, point-wise geodetic surveying techniques, such as total station or GPS. Deformation monitoring using terrestrial laser scanning is gaining considerable attention mainly due to the high spatial resolution of the acquired data. It can provide dense 3D information of the surface of an object. A disadvantage of the technique may be the difficulty to assess some fixed benchmarks on the surface of the deforming area, unless they are special targets that can be recognised by the accompanying software. To solve this problem, a new automatic deformation acquisition method based on nurbs surface was presented. The paper discusses methods of nurbs surface modelling implemented for deformation monitoring and approaches used to measure the deformation from surfaces. Finally, applications involving the use of laser scanning in bridge are presented.

Research on the Data Collection Method in Road Slope Detection Based on 3D Laser Scanner

2011 ◽  
Vol 94-96 ◽  
pp. 826-829
Author(s):  
Jia Ping Zhang ◽  
He Wu ◽  
Yu Qin Feng ◽  
Guang Yang ◽  
Guo Feng Wang ◽  
...  
Keyword(s):  
Slope Stability ◽  
Data Acquisition ◽  
Laser Scanning ◽  
Laser Scanner ◽  
Engineering Application ◽  
Data Detection ◽  
Detection Point ◽  
Working Principle ◽  
Acquisition Method ◽  
Road Slope

The foundation of slope stability analysis is the data acquisition of the deformation. How to obtain the data detection point directly and efficiently is the access to achieve real-time predict method to slope stability. By introducing the Trimble GX 3D laser scanning data acquisition method, road slope detection method is put forward. According to the scanner system and working principle of the implementation steps, the slope detection and data processing procedures are developed and present references to the slope detection. With specific engineering application analysis, the feasibility of such acquisition is verified.

EXPERIENCE OF USING GLS-1500 SCANNER IN ENGINEERING-GEODETIC SURVEYING OF ROADS

2019 ◽  
Vol 13 (2) ◽  
pp. 26-34
Author(s):  
B. F. Azarov
Keyword(s):  
Laser Scanning ◽  
Laser Scanner ◽  
Field Work ◽  
Optimal Time ◽  
Data Processing Software ◽  
Federal Highway ◽  
Geodetic Control ◽  
Scan Data ◽  
Estimation Of Time ◽  
Geodetic Surveying

Abstract: modern geodetic technologies allow us to quickly obtain relevant, precise and reliable geospatial data. An example of such a technology is ground-based laser scanning. Currently, this technology is actively used in the performance of engineering and geodetic surveys of roads. The devices and software of different companies are used, differing in their accuracy characteristics and functionality. The article focuses on the experience of the use of GLS-1500 ground-based laser scanner produced by TOPCON and ScanMaster ground-based laser scanning data processing software for engineering and geodetic surveys in order to repair nine sections of the Federal highway R-256 "Chuysky tract" with a total length of over than 100 km. The article also describes the options used for registration of scanning data, the features of their use depending on the availability of geodetic control on the object. The order of processing the results of ground-based laser scanning using ScanMaster software is considered. According to the results of field work on ground-based laser scanning of nine sections of the R-256 highway, the time and accuracy of scanning data were estimated. The method of estimation of time spent on scanning works is also described. The issue of evaluating the accuracy of obtaining the scan data in the ScanMaster software is considered. It is noted that the accuracy of the geodetic reference, thus, the accuracy of the absolute orientation of the scans can be estimated by the differences between the coordinates of the marks that were scanned from the location of the device and calculated by ScanMaster software, and their specified values obtained from the equalization of the geodetic control. In conclusion, it is stated that the optimal time and accuracy of scanning with GLS-1500 device are achieved by using the geodetic reference of the scans by the inverse length-angle intersection at two points of the geodetic control.

Realization of the 3D Simulation Model of the Hui-Quan Substation

2012 ◽  
Vol 529 ◽  
pp. 195-199
Author(s):  
Qiu Long Liu ◽  
Wu Sheng Hu
Keyword(s):  
Spatial Data ◽  
Laser Scanning ◽  
3D Visualization ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Target Surface ◽  
Spatial Location ◽  
Dynamic Visualization ◽  
Three Dimensional Model ◽  
Object A

3D (three-dimensional) laser scanning can be used to collect spatial location of points rapidly and abundantly, and obtain three-dimensional coordinates of the target surface, which provides new technical means for the rapid creation of three-dimensional image model of the object. A three-dimensional modeling study on spatial object was carried out using the spatial data captured via ground-based 3D laser scanner in the Hui-Quan substation. The experiment result shows that rapid 3D visualization modeling on buildings can be achieved via the methods and procedures mentioned above. It has solved that the traditional equipment and the measuring technique is insufficiency in the special domain. It will bring the application mode and technical advantage, which tradition mapping way can not have. A platform for three-dimensional model of the substation can be achieved for the resources, landscape, security, environmental management and other social resources of digital, networked and dynamic visualization.

scholarly journals 3D TEXTURED MODELLING OF BOTH EXTERIOR AND INTERIOR OF KOREAN STYLED ARCHITECTURES

2017 ◽  
Vol XLII-2/W5 ◽  
pp. 439-442 ◽  
Author(s):  
J.-D. Lee ◽  
K.-J. Bhang ◽  
W. Schuhr
Keyword(s):  
Laser Scanning ◽  
Laser Scanner ◽  
3D Modelling ◽  
Deformation Monitoring ◽  
Terrestrial Laser Scanner ◽  
Cultural Assets ◽  
Modelling Procedure ◽  
Digital Documentation ◽  
Documentation Tool ◽  
Safety Diagnosis

This paper describes 3D modelling procedure of two Korean styled architectures which were performed through a series of processing from data acquired with the terrestrial laser scanner. These two case projects illustate the use of terrestrial laser scanner as a digital documentation tool for management, conservation and restoration of the cultural assets. We showed an approach to automate reconstruction of both the outside and inside models of a building from laser scanning data. Laser scanning technology is much more efficient than existing photogrammetry in measuring shape and constructing spatial database for preservation and restoration of cultural assets as well as for deformation monitoring and safety diagnosis of structures.

scholarly journals How Much of a Historic Town Can Be Mapped by a Terrestrial Laser Scanner within a Working Day? - A Single Touch Workflow

2017 ◽  
Vol 1 (2) ◽  
pp. 239-250
Author(s):  
Christoph Fürst ◽  
Nikolaus Studnicka ◽  
Martin Pfennigbauer
Keyword(s):  
Laser Scanning ◽  
Laser Scanner ◽  
Terrestrial Laser Scanning ◽  
Point Clouds ◽  
Urban Environments ◽  
Terrestrial Laser Scanner ◽  
Single Operator ◽  
Working Day ◽  
The One ◽  
3D Information

Downtown Vienna with its world-famous cultural sites and architectural features is most definitely worth conservation. One way to archive at least a digital 3D imprint is laser scanning. While urban mapping with airborne or mobile laser scanning is fast and efficient, the resulting point clouds might not have the required resolution or might experience gaps due to shadowing. Terrestrial laser scanning has the potential to overcome these limitations. However, it has long been considered time-consuming and labour-intensive both while capturing and also while processing the data.In order to challenge this, we performed a field test with the new RIEGL VZ-400i terrestrial laser scanner. For eight hours, in the night from 2nd to 3rd of June 2016, one single operator employed the instrument throughout the city center of Vienna. He managed to take 514 high-resolution laser scans with approximately 9m between the scan positions.The data acquired in the course of this test impressively demonstrates the potential of state-of-the-art terrestrial laser scanning to preserve detailed 3D-information of urban environments within limited amount of time. This paper describes the complete workflow from the one touch operation in the field up to the automatic registration process of the collected laser scans.     

New Technology of Surveying and Mapping in the Application of Deformation Monitoring

2013 ◽  
Vol 333-335 ◽  
pp. 1492-1495 ◽  
Author(s):  
Yan Ping Feng ◽  
Tian Zhu Zheng
Keyword(s):  
Real Time ◽  
Laser Scanning ◽  
New Technology ◽  
Three Dimensional ◽  
Laser Scanner ◽  
High Accuracy ◽  
Deformation Monitoring ◽  
High Density ◽  
Monitoring Methods ◽  
Engineering Measurement

Deformation monitoring is one of the engineering measurement tasks. Three-dimensional laser scanning technology as a new technology has developed in recent years. With its high accuracy, high density, real-time and initiative, it wins great favor of people in the industry. Its unique technical advantages and characteristics make it widely used in many fields. The article summarizes the application of deformation monitoring methods and discusses the characteristics of ground 3D laser scanner, its working principles, its application in the field of deformation monitoring and some problems that should be considered.

Movement and Erosion Quantification of Large Landslide through Terrestrial Laser Scanning

2013 ◽  
Vol 838-841 ◽  
pp. 1985-1991
Author(s):  
Man Hu ◽  
Mo Wen Xie ◽  
Bo Xu ◽  
Li Wei Wang
Keyword(s):  
Laser Scanning ◽  
Laser Scanner ◽  
Terrestrial Laser Scanning ◽  
Deformation Monitoring ◽  
Landslide Risk ◽  
Change Analysis ◽  
Analysis Methodology ◽  
Landslide Deformation ◽  
The Stability ◽  
Landslide Movement

The deformation monitoring of the landslide is an important research in the field of slope engineering. The terrestrial laser scanner is frequently applied to the deformation monitoring for landslide risk reduction in recent years. In this paper, the deformation was detected by means of comparison of sequential scanning datasets. And the erosion quantification can be extracted from the deformation. Finally, a preliminary change analysis methodology to distinguish landslide movement from erosion is presented. Our results enable us evaluate the stability of the landslide generally and basically. The application of terrestrial laser scanning to detect the movement and erosion quantification provides us another considerably effective and efficient way in the high-risk landslide deformation monitoring.

scholarly journals DATUM FEATURE EXTRACTION AND DEFORMATION ANALYSIS METHOD BASED ON NORMAL VECTOR OF POINT CLOUD

2018 ◽  
Vol XLII-3 ◽  
pp. 1601-1606
Author(s):  
W. Sun ◽  
J. Wang ◽  
F. Jin ◽  
Z. Liang ◽  
Y. Yang
Keyword(s):  
Point Cloud ◽  
Laser Scanning ◽  
Large Scale ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Deformation Monitoring ◽  
Deformation Analysis ◽  
Normal Vector ◽  
Analysis Method ◽  
Data Set

In order to solve the problem lacking applicable analysis method in the application of three-dimensional laser scanning technology to the field of deformation monitoring, an efficient method extracting datum feature and analysing deformation based on normal vector of point cloud was proposed. Firstly, the kd-tree is used to establish the topological relation. Datum points are detected by tracking the normal vector of point cloud determined by the normal vector of local planar. Then, the cubic B-spline curve fitting is performed on the datum points. Finally, datum elevation and the inclination angle of the radial point are calculated according to the fitted curve and then the deformation information was analyzed. The proposed approach was verified on real large-scale tank data set captured with terrestrial laser scanner in a chemical plant. The results show that the method could obtain the entire information of the monitor object quickly and comprehensively, and reflect accurately the datum feature deformation.

Results of studying the dimensional accuracy of the bases of complete removable prostheses made using 3D printing and traditional technologies

2020 ◽  
pp. 34-39
Author(s):  
Vokulova Yu.A. Vokulova ◽  
E.N. Zhulev
Keyword(s):  
3D Printing ◽  
Traditional Method ◽  
Laser Scanning ◽  
Laser Scanner ◽  
Digital Technologies ◽  
Dimensional Accuracy ◽  
3D Printer ◽  
Significance Level ◽  
Average Value ◽  
The Difference

This article presents the results of studying the dimensional accuracy of the bases of complete removable prostheses made using a 3D printer and the traditional method. Bases of complete removable prostheses were made using an intraoral laser scanner iTero Cadent (USA) and a 3D printer Asiga Max UV (Australia). To study the dimensional accuracy of the bases of complete removable prostheses, we used the DentalCAD 2.2 Valletta software. The Nonparametric Wilcoxon W-test was used for statistical analysis of the obtained data. We found that the average value of the difference with the standard for bases made using digital technologies is 0.08744±0.0484 mm. The average value of the difference with the standard for bases made by the traditional method is 0.5654±0.1611 mm. Based on these data, we concluded that the bases of complete removable prostheses made using modern digital technologies (intraoral laser scanning and 3D printer) have a higher dimensional accuracy compared to the bases of complete removable prostheses made using the traditional method with a significance level of p<0.05 (Wilcoxon's W-test=0, p=0.031). Keywords: digital technologies in dentistry, digital impressions, intraoral scanner, 3D printing, ExoCAD, complete removable dentures.

scholarly journals Estimation of Vegetation-Induced Flow Resistance for Hydraulic Computations Using Airborne Laser Scanning Data

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1864
Author(s):  
Peter Mewis
Keyword(s):  
Laser Scanning ◽  
Flow Resistance ◽  
Laser Scanner ◽  
Airborne Laser Scanning ◽  
Density Parameter ◽  
Vegetation Density ◽  
Airborne Laser Scanner ◽  
Airborne Laser ◽  
Bed Roughness ◽  
Available Information

The effect of vegetation in hydraulic computations can be significant. This effect is important for flood computations. Today, the necessary terrain information for flood computations is obtained by airborne laser scanning techniques. The quality and density of the airborne laser scanning information allows for more extensive use of these data in flow computations. In this paper, known methods are improved and combined into a new simple and objective procedure to estimate the hydraulic resistance of vegetation on the flow in the field. State-of-the-art airborne laser scanner information is explored to estimate the vegetation density. The laser scanning information provides the base for the calculation of the vegetation density parameter ωp using the Beer–Lambert law. In a second step, the vegetation density is employed in a flow model to appropriately account for vegetation resistance. The use of this vegetation parameter is superior to the common method of accounting for the vegetation resistance in the bed resistance parameter for bed roughness. The proposed procedure utilizes newly available information and is demonstrated in an example. The obtained values fit very well with the values obtained in the literature. Moreover, the obtained information is very detailed. In the results, the effect of vegetation is estimated objectively without the assignment of typical values. Moreover, a more structured flow field is computed with the flood around denser vegetation, such as groups of bushes. A further thorough study based on observed flow resistance is needed.

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