Modeling Systematic Errors for the Angle Measurement in a Virtual Surveying Instrument

Shiu, Ruei-Shiue; Kang, Shih‐Chung; Han, Jen-Yu; Hsieh, Shang‐Hsien

doi:10.1061/(asce)su.1943-5428.0000046

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Over the past decade, researchers have focused on improving the measurement accuracy and convenience of optical levels. Shiu modeled the systematic errors in angle measurement in a virtual level [8]. Pellegrinelli designed a low-cost motorization of the Leica DNA03 digital level to enable the automatic monitoring of deformations, without compromising its manual use in leveling [9].…”

Section: Measurement Science and Technologymentioning

confidence: 99%

A flexible and cost-effective compensation method for leveling using large-scale coordinate measuring machines and its application in aircraft digital assembly

Deng

Huang

2018

Meas. Sci. Technol.

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In the assembly process of large-size aerospace products, the leveling and horizontal alignment of large components are essential prior to the installation of an inertial navigation system (INS) and the final quality inspection. In general, the inherent coordinate systems of large-scale coordinate measuring devices are not coincident with the geodetic horizontal system, and a dualaxis compensation system is commonly required for the measurement of difference in heights. These compensation systems are expensive and dedicated designs for different devices at present. Considering that a large-size assembly site usually needs more than one measuring device, a compensation approach which is versatile for different devices would be a more convenient and economic choice for manufacturers. In this paper, a flexible and cost-effective compensation method is proposed. Firstly, an auxiliary measuring device called a versatile compensation fixture (VCF) is designed, which mainly comprises reference points for coordinate transformation and a dual-axis inclinometer, and a kind of network tighten points (NTPs) are introduced and temporarily deployed in the large measuring space to further reduce transformation error. Secondly, the measuring principle of height difference is studied, based on coordinate transformation theory and trigonometry while considering the effects of earth curvature, and the coordinate transformation parameters are derived by least squares adjustment. Thirdly, the analytical solution of leveling uncertainty is analyzed, based on which the key parameters of the VCF and the proper deployment of NTPs are determined according to the leveling accuracy requirement. Furthermore, the proposed method is practically applied to the assembly of a large helicopter by developing an automatic leveling and alignment system. By measuring four NTPs, the leveling uncertainty (2σ) is reduced by 29.4% to about 0.12 mm, compared with that without NTPs.

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Section: Measurement Science and Technologymentioning

confidence: 99%

A flexible and cost-effective compensation method for leveling using large-scale coordinate measuring machines and its application in aircraft digital assembly

Deng

Huang

2018

Meas. Sci. Technol.

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“…Another desktop-based attempt was SimuSurvey and SimuSurvey X, developed by [29][30][31], which simulated manipulation of surveying instruments. Furthermore, the software simulated instrument errors and their interaction, which aided student comprehension of instrument operation and systematic erratic behavior [33]. Assessment of the software in surveying education showed an improvement of student academic performance [34]; however, some of the identified limitations were the inability to read measured data and decision-making of surveying procedures in a 3D environment that includes terrain constraints [34].…”

Section: Introductionmentioning

confidence: 99%

Surveying Reality (SurReal): Software to Simulate Surveying in Virtual Reality

Bolkas

Chiampi

Fioti

et al. 2021

IJGI

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Experiential learning through outdoor labs is an integral component of surveying education. Cancelled labs as a result of weather, the inability to visit a wide variety of terrain location, recent distance education requirements create significant instructional challenges. In this paper, we present a software solution called surveying reality (SurReal); this software allows for students to conduct immersive and interactive virtual reality labs. This paper discusses the development of a virtual differential leveling lab. The developed software faithfully replicates major steps followed in the field and any skills learned in virtual reality are transferable in the physical world. Furthermore, this paper presents a novel technique for leveling multi-legged objects like a tripod on variable terrain. This method relies solely on geometric modeling and does not require physical simulation of the tripod. This increases efficiency and ensures that the user experiences at least 60 frames per second, thus reducing lagging and creating a pleasant experience for the user. We conduct two leveling examples, a three-benchmark loop and a point-to-point leveling line. Both surveys had a misclosure of 1 mm due to observational random errors, which demonstrated that leveling can be conducted with mm-level precision, much like in the physical world.

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Collaborative Virtual Reality Training Experience for Engineering Land Surveying

Franzluebbers

Tuttle

Johnsen

et al. 2020

Cross Reality and Data Science in Engineering

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Modeling Systematic Errors for the Angle Measurement in a Virtual Surveying Instrument

Cited by 5 publications

References 12 publications

A flexible and cost-effective compensation method for leveling using large-scale coordinate measuring machines and its application in aircraft digital assembly

A flexible and cost-effective compensation method for leveling using large-scale coordinate measuring machines and its application in aircraft digital assembly

Surveying Reality (SurReal): Software to Simulate Surveying in Virtual Reality

Collaborative Virtual Reality Training Experience for Engineering Land Surveying

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