Uncertainty evaluation of proposed setup for the calibration of vertical angle measuring systems by using means for the flat angle calibration

Šiaudinytė, Lauryna; Suh, Hae Sun

doi:10.1016/j.measurement.2015.01.001

Cited by 13 publications

(13 citation statements)

References 3 publications

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“…The angle measurement pitch can be controlled by adjusting the distance between the device and the reference scale. Although, the measurement range is limited to 90°± 17°, which is smaller in comparison with method described in [12], it can be expanded by adapting a longer calibration scale. Moreover, by using proposed method, some very small angles could be measured by controlling both horizontal and vertical distances.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, by using proposed method, some very small angles could be measured by controlling both horizontal and vertical distances. However, the smallest measurement pitch mentioned in [12] is dependent on the indexing table used and often limited to 15 00 when using Moore 1440 Precision Index.…”

Section: Discussionmentioning

confidence: 99%

“…A further setup for vertical angle calibration of total stations has been proposed by colleagues at KRISS (Korea Research Institute of Standards and Science) [12]. A special piece of apparatus with a tribrach and total station support is mounted on Moore's Special index.…”

Section: Related Researchmentioning

confidence: 99%

“…The mirror is attached to the telescope of a total station, to which an autocollimator is pointed. In this way the setup for flat angle calibration was used to calibrate the vertical angles, with the expanded uncertainty of U 95% = 0.52 00 (k = 2) [12,13].…”

Section: Related Researchmentioning

confidence: 99%

“…The uncertainties due to the limited display resolution of the devices can be evaluated as shown below in (12):…”

Section: Uncertainty Evaluationmentioning

confidence: 99%

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Uncertainty evaluation of trigonometric method for vertical angle calibration of the total station instrument

Šiaudinytė

Grattan

2016

Measurement

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The total station is an instrument, widely used in civil and environmental engineering, for flat and vertical angle as well as distance measurements. Typically, routine calibration of such an instrument is obligatory, and depending on the local regulations, is performed typically annually or biannually. Analysis of previous research shows that undertaking flat angle calibration under laboratory conditions is more common than calibration of vertical angle measuring systems. This paper deals with a trigonometric vertical angle calibration method and research into determining the main sources of uncertainty is described in the paper. The principle of the method is explained, as well as the uncertainty evaluation based on GUM and the advantages as well as the weaknesses of the setup are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Related Researchmentioning

confidence: 99%

Section: Related Researchmentioning

confidence: 99%

“…The uncertainties due to the limited display resolution of the devices can be evaluated as shown below in (12):…”

Section: Uncertainty Evaluationmentioning

confidence: 99%

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Uncertainty evaluation of trigonometric method for vertical angle calibration of the total station instrument

Šiaudinytė

Grattan

2016

Measurement

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Reflector automatic acquisition and pointing based on auto-collimation theodolite

Luo

Wang

Zheng

et al. 2018

Review of Scientific Instruments

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An auto-collimation theodolite (ACT) for reflector automatic acquisition and pointing is designed based on the principle of autocollimators and theodolites. First, the principle of auto-collimation and theodolites is reviewed, and then the coaxial ACT structure is developed. Subsequently, the acquisition and pointing strategies for reflector measurements are presented, which first quickly acquires the target over a wide range and then points the laser spot to the charge coupled device zero position. Finally, experiments are conducted to verify the acquisition and pointing performance, including the calibration of the ACT, the comparison of the acquisition mode and pointing mode, and the accuracy measurement in horizontal and vertical directions. In both directions, a measurement accuracy of ±3″ is achieved. The presented ACT is suitable for automatic pointing and monitoring the reflector over a small scanning area and can be used in a wide range of applications such as bridge structure monitoring and cooperative target aiming.

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Camera-aided autocollimation approach for increasing the effective measurement range of a photoelectric collimator

Liu

Meng²,

et al. 2019

Review of Scientific Instruments

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A camera aided autocollimation (CAAC) system is proposed to enhance the working range of a photoelectric collimator (PEC). This system consists of a camera surrounded by point light sources (LSs), a PEC, a rotary table, and a translation stage. As the tilt angle of the target varies, the intensity of the light from the LSs that is reflected by the target and received by the camera exhibits two symmetric peaks. The camera guides the target into the scope of the PEC by scanning these two peaks. This CAAC approach can automatically collimate a prism with an edge length of 10 mm and an initial tilt angle of 5° at a working range of 1.5 m. The error of the coarse collimation at 99.7% confidence is 602″.

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Uncertainty evaluation of proposed setup for the calibration of vertical angle measuring systems by using means for the flat angle calibration

Cited by 13 publications

References 3 publications

Uncertainty evaluation of trigonometric method for vertical angle calibration of the total station instrument

Uncertainty evaluation of trigonometric method for vertical angle calibration of the total station instrument

Reflector automatic acquisition and pointing based on auto-collimation theodolite

Camera-aided autocollimation approach for increasing the effective measurement range of a photoelectric collimator

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