Precise determination of mini railway track with ground based laser scanning

Meng, Xiaolin; Liu, C.; Li, N.; Ryding, Joseph

doi:10.1179/1752270613y.0000000072

Cited by 7 publications

(4 citation statements)

References 7 publications

(3 reference statements)

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“…The deformation monitoring system based on inclination sensor [15] can automatically monitor the settlement of bridge, relative displacement of pier and deflection of beam body but is unable to obtain threedimensional coordinates of deformation points. The deformation monitoring method based on 3D laser scanner [16][17][18][19] can efficiently and real-time obtain 3D point cloud data of the structure to be tested and obtain deformation information of the structure to be tested by post-processing point cloud data. However, existing three-dimensional laser scanning point cloud method requires manual preprocessing of collected point cloud data which has complex operation, low efficiency and poor repeatability.…”

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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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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“…Mobile vehicle [24][25][26][27][28] Measured by a total station tracking a moving reflector; Measured by post-processed precise positioning solution cm Easy to operate Limited region; High cost; Depend on the type of environment Mini railway track [29][30][31] Measured by a total station sampling point-by-point on the track mm High-precision Limited region; High cost pre-surveying the mounting point through high-precision geodetic approaches.…”

Section: Introductionmentioning

confidence: 99%

“…Betaille et al tested the GPS multipath phase errors using a closed-loop track, the overall dimensions of which are 81 m × 16 m. The track is pre-surveyed accurate to the order of a few millimeters to be used as a reference trajectory [29,30]. Meng and Liu presented the use of a mini railway track for kinematic positioning tests in the Nottingham Geospatial Building on the Jubilee Campus of the University of Nottingham [31]. This track was 120 m long and had a pinched and obround shape.…”

Section: Introductionmentioning

confidence: 99%

A trajectory similarity-based method to evaluate GNSS kinematic precise positioning performance with a case study

Si-qi

Chen²,

Niu³

et al. 2022

Meas. Sci. Technol.

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There is a lack of effective testing methods to evaluate high-precision global navigation satellite system (GNSS) kinematic positioning solutions, such as GNSS real-time kinematic (RTK) or post-processed kinematic (PPK), with centimeter-level accuracy. Current methods either process static GNSS data in kinematic mode to perform a pseudo-kinematic test or use a precise motion table to make a real kinematic test but within a very limited travel distance. This study proposes a trajectory similarity method by moving a track trolley platform along a railway track, which can match the GNSS positioning trajectory and the pre-surveyed reference track. The GNSS trajectory offsets from the reference track along the cross-track and vertical directions are regarded as GNSS kinematic positioning errors. Lever-arm compensation was applied to achieve millimeter-level accuracy for this evaluation method. A case study was conducted to evaluate the positioning performance of the GPS/BDS PPK using the proposed method. The results indicate that the proposed method can provide a reference trajectory on the order of a few millimeters, which is sufficiently accurate even for PPK positioning performance evaluation and error source tracing in wide regions. In this case, cycle slips as small as 10 cm in the carrier phase measurements can be detected and studied based on the proposed method.

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“…Liu et al (2013) gave a new method to detect high speed railway subsidence and geometry irregularity using terrestrial laser scanning. Meng et al (2014) used ground based laser scanning for the determination of highly accurate railway tracks.…”

Section: Introductionmentioning

confidence: 99%

Detection of high speed railway track static regularity with laser trackers

et al. 2014

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Track regularity is of vital importance in the safety of high speed railway operation. A laser tracker can collect highly accurate three-dimensional (3D) point measurements. Therefore, it is considered as a promising surveying technique for the detection of railway track static irregularity as opposed using to a total station. This study proposes a new approach that uses a laser tracker as the main sensor for obtaining the coordinates of left-and right-track points to detect potential track static irregularities. In this method, the reflecting target of the laser tracker is on a track inspection trolley moving in a round trip along the railway track. A field experiment was conducted to validate the results by comparing the results with the field measurements gathered using a track inspection trolley. The results show that the track static regularity detection method with laser trackers is feasible and indicate that track geometry parameters such as gauges, elevations and lateral deviations of centreline, superelevations, lateral profiles and vertical profiles obtained using the laser tracker and a track inspection trolley are in a good agreement. The average of deviations of track centreline elevations, lateral deviations, and gauges are 0.8, 0.7 and 0.3 mm.

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Precise determination of mini railway track with ground based laser scanning

Cited by 7 publications

References 7 publications

A method for detecting parallelism and flatness of truss tracks

A method for detecting parallelism and flatness of truss tracks

A trajectory similarity-based method to evaluate GNSS kinematic precise positioning performance with a case study

Detection of high speed railway track static regularity with laser trackers

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