Development and application of deformation monitoring system for lanslide at Funchunjiang Dam

Yao, Lianbi; Sun, H. L.; Zhu, Ling; Zhou, Yang

doi:10.1179/1752270614y.0000000109

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…Usually the displacements of the dam body, slopes on both banks and unfavorable geological bodies near the reservoir are obtained to grasp the operational status of the dam [9]. Y Prat et al [10,11] tested different types of robotic total stations for automatic dam displacements monitoring and proved strong feasibility of the method. J Zhou et al [12] analyzed the accuracy of dam displacements monitoring with robotic total stations and verified the correction methods for refraction.…”

Section: Introductionmentioning

confidence: 99%

Water level measurement for reservoir dams with robotic total station during displacements monitoring

Zhou,

Gao,

Xiao

et al. 2024

Eng. Res. Express

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This study proposes a novel method for water level measurement of reservoir dams by utilizing the image sensor of robotic total station rather than requiring a staff gauge during displacements monitoring. The robotic total station is first aimed at the waterline manually and an image is captured by the telescope coaxial camera to obtain the initial elevation and waterline equation. In the periodic measurement stage, the zenith angle of the telescope is adjusted according to the predicted result to take pictures, and the waterline is extracted based on the parameters of the initial waterline equation through image processing technologies. The waterline is verified, and the water level elevation is estimated then. Simulation and field test results show that waterline extraction error affects the accuracy of the proposed method most, and an accuracy of around 2 pixels can be achieved for the waterline extraction method. And a water level measurement result with centimeter-level accuracy at a distance of about 350m can be expected, which has engineering application prospect.

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Section: Introductionmentioning

confidence: 99%

Water level measurement for reservoir dams with robotic total station during displacements monitoring

Zhou,

Gao,

Xiao

et al. 2024

Eng. Res. Express

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“…At present, the measurement sensors used in the automatic deformation monitoring system mainly include measurement robots, GNSS receivers, tilt cameras, laser tracking instruments, fiber grating sensors, inclination sensors, and 3D laser scanners. The automatic deformation monitoring system based on the measuring robot mainly includes a single monitoring system [2][3][4] and multiple monitoring systems [5] . A single monitoring system is simple in structure and convenient to deploy but when there are many deformation points and discrete distribution, a period of observation will consume a lot of time and cannot guarantee visibility.…”

Section: Introductionmentioning

confidence: 99%

A method for detecting parallelism and flatness of truss tracks

Fan,

Jing,

Jing

2023

International Conference on Remote Sensing, Mapping, and Geographic Systems (RSMG 2023)

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As a large structure, the truss track will inevitably wear and deform during long-term operation, which can negatively impact construction safety and quality. Therefore, it is necessary to safely, quickly and accurately detect the parallelism and flatness of the truss track. This paper proposes a new method for detecting parallelism and flatness of truss track based on point cloud data of 3D laser scanner. A corresponding data post-processing system is developed based on the method proposed above. Finally, the proposed method and system have been successfully applied to an actual detecting project of truss track in a large-scale iron and steel enterprise. The results show that the new method proposed in this paper is effective and feasible.

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“…The total station is one of the most representative geodetic instruments, and it plays an important role in the field of deformation monitoring. It has been broadly employed in deformation monitoring and geological hazards monitoring of dams [ 17 ], bridges [ 18 ], tunnels [ 19 ], and other civil infrastructures. Especially with the improvement of accuracy and automation in the total station [ 20 – 22 ], the birth of the robotic total station (RTS) makes its advantages in continuous automatic monitoring of deformation more obvious.…”

Section: Introductionmentioning

confidence: 99%

Accuracy analysis of dam deformation monitoring and correction of refraction with robotic total station

et al. 2021

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Robotic total stations have been widely used in continuous automatic monitoring of dam deformations. In this regard, monitoring accuracy is an important factor affecting deformation analysis. First the displacements calculation methods for dam deformation monitoring with total stations are presented, and the corresponding mean square error formulas are derived. Then for errors caused by atmospheric refraction, two correction methods are described. Simulations were conducted to compare the displacement accuracy calculated through different methods. It indicated that the difference between polar coordinate method and forward intersection is less than 0.5mm within around 400m’ monitoring range, and in such cases, the polar coordinate method is preferred, as only one total station is required. Refraction correction tests with observations from two dams demonstrated that both correction methods could effectively enhance the monitoring accuracy. For observation correction, correction through the closest reference point achieves better correction results.

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Development and application of deformation monitoring system for lanslide at Funchunjiang Dam

Cited by 8 publications

References 2 publications

Water level measurement for reservoir dams with robotic total station during displacements monitoring

Water level measurement for reservoir dams with robotic total station during displacements monitoring

A method for detecting parallelism and flatness of truss tracks

Accuracy analysis of dam deformation monitoring and correction of refraction with robotic total station

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