scholarly journals Verification of GNSS Measurements of the Railway Track Using Standard Techniques for Determining Coordinates

2020 ◽  
Vol 12 (18) ◽  
pp. 2874 ◽  
Author(s):  
Cezary Specht ◽  
Andrzej Wilk ◽  
Wladyslaw Koc ◽  
Krzysztof Karwowski ◽  
Paweł Dąbrowski ◽  
...  
Keyword(s):  
Measuring System ◽  
Railway Track ◽  
Satellite Measurements ◽  
Railway Line ◽  
University Of Technology ◽  
Railway Infrastructure ◽  
Spatial System ◽  
Mobile Satellite ◽  
Gnss Measurements ◽  
Geometric Layout

The problem of the reproduction of the railway geometric layout in the global spatial system is currently solved in the form of measurements that use geodetic railway networks and also, in recent years, efficient methods of mobile positioning (mainly satellite and inert). The team of authors from the Gdańsk University of Technology and the Maritime University in Gdynia as part of the research project InnoSatTrack is looking for effective and efficient methods for the inventory of railway lines. The research is part of a wider investigation BRIK (Research and Development in Railway Infrastructure, in polish: Badania i Rozwój w Infrastrukturze Kolejowej). This paper presents a comparative analysis of the problem of the reproduction of the trajectory of the measuring system using tacheometry, satellite measurements made using a measurement trolley, and mobile satellite measurements. Algorithms enabling the assessment of the compliance of satellite measurements with classic tacheometric measurements were presented. To this end, the authors held measurement sessions using modern geodetic instruments and satellite navigation on a section of the railway line. The results of the measurements indicate the convergence of the level of accuracy achieved by different measuring techniques.

scholarly journals Analysis of the possibilities in railways shape assessing using GNSS mobile measurements

2019 ◽  
Vol 262 ◽  
pp. 11004 ◽  
Author(s):  
Wladyslaw Koc ◽  
Cezary Specht ◽  
Piotr Chrostowski ◽  
Jacek Szmagliński
Keyword(s):  
Low Cost ◽  
Railway Track ◽  
Satellite Measurements ◽  
Positioning Systems ◽  
Railway Line ◽  
Design Changes ◽  
Satellite Positioning ◽  
Measurement Methodology ◽  
Mobile Satellite ◽  
Gnss Measurements

In recent years, a dynamic development of satellite positioning techniques using both static and mobile GNSS coordinates register mode can be observed. In addition, still developing Real-time GNSS Networks, post-processing algorithms and another measurement signal analysis algorithms, make the satellite measurements increasingly used in railway industry sector. In the article the possibilities which follows from the mobile satellite measurements in railway engineering are briefly presented. In the years 2009-2015, the authors conducted a series of field investigations on operated railway lines. The obtained results of these measurements led to the development of a number of algorithms that increase the range of applicability of GNSS measurements. The analysis of obtained results also showed how the accuracy of the measurements have increased since 2009. The achieved accuracy has been increased due to a development of GNSS positioning systems as well as improvement of the measurement methodology, i.e. configurations of satellite receivers and layouts of their placement on a mobile measuring platform. It was also found that the development of data analysis algorithms contributed to the increase in the obtained accuracy in assessment of a railway track axis shape. The authors indicate the possibilities of applying GNSS techniques at various stages of construction and operation of railways. According to the authors, the most important advantage of both the presented measurement technique and computational methodology is the ability to effectively and relatively low-cost data acquisition regarding the existing state of the railway line. These data can be successfully used to design changes to the geometry of railway lines, and therefore satellite positioning has enormous application potential in the process of modernization of operated railway lines.

scholarly journals Evaluation of the Possibility of Identifying a Complex Polygonal Tram Track Layout Using Multiple Satellite Measurements

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4408
Author(s):  
Andrzej Wilk ◽  
Cezary Specht ◽  
Wladyslaw Koc ◽  
Krzysztof Karwowski ◽  
Jacek Skibicki ◽  
...  
Keyword(s):  
Measurement Data ◽  
Satellite System ◽  
Infrastructure Management ◽  
Satellite Measurements ◽  
University Of Technology ◽  
Management Processes ◽  
Railway Infrastructure ◽  
Mobile Satellite ◽  
Global Navigation Satellite ◽  
Geometric Layout

We present the main assumptions about the algorithmization of the analysis of measurement data recorded in mobile satellite measurements. The research team from the Gdańsk University of Technology and the Maritime University in Gdynia, as part of a research project conducted in cooperation with PKP PLK (Polish Railway Infrastructure Manager), developed algorithms supporting the identification and assessment of track axis layout. This article presents selected issues concerning the identification of a tramway line’s axis system. For this purpose, the supporting algorithm was developed and measurement data recorded using Global Navigation Satellite System (GNSS) techniques was evaluated and analyzed. The discussed algorithm identifies main track directions from multi-device data and repeated position recordings. In order to observe the influence of crucial factors, the investigated route was carefully selected. The chosen tramway track was characterized by its location in various field conditions and a diversified and complex geometric layout. The analysis of the obtained results was focused on the assessment of the signal’s dispersion and repeatability using residuals in relation to the estimated track’s direction. The presented methodology is intended to support railway infrastructure management processes, mainly in planning and maintenance through an efficient inventory of the infrastructure in service.

scholarly journals The analytical design method of railway route’s main directions intersection area

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Wladysław Koc
Keyword(s):  
Design Method ◽  
Design Procedure ◽  
Analytical Form ◽  
Local System ◽  
Railway Track ◽  
Satellite Measurements ◽  
Railway Line ◽  
Universal Approach ◽  
Intersection Area ◽  
Mobile Satellite

Abstract The paper presents a design method related to railway track sections situated in a bend. In the method advantage is taken of an analytical form of description by using appropriate mathematical formulae. This may becomeparticularly usefulwhen the investigations are based on the data obtained from mobile satellite measurements. In the paper attention is concentrated on an universal approach creating an opportunity to diversify the type and length of the transition curves in use. The design procedure of the geometric lay-out is allocated to a particular local system of coordinates to be followed by a special transfer of the obtained solution to the national frame of space references 2000. The adopted course of procedure together with adequate theoretical relations has been provided. All the study has been illustrated with calculation examples based on data obtained from the railway line in operation.

scholarly journals Determination of the tram track axis using a multi receiver GNSS measurement system

2020 ◽  
Vol 2020 (4) ◽  
pp. 1-17
Author(s):  
Andrzej Wilk ◽  
◽  
Cezary Specht ◽  
Władysław Koc ◽  
Krzysztof Karwowski ◽  
...  
Keyword(s):  
Interdisciplinary Research ◽  
Railway Track ◽  
Satellite Measurement ◽  
Accuracy Analysis ◽  
Satellite Measurements ◽  
University Of Technology ◽  
Gnss Receivers ◽  
Multiple Measurements ◽  
Mobile Satellite

This article refers to research, that has been conducted by an interdisciplinary research team from the Gdańsk University of Technology and the Maritime University in Gdynia since 2009. These investigation concerns the determination of a railway track axis using the mobile satellite measurement technique. Following the dynamic development of GNSS techniques, that could be seen in the last decade, the team carried out further experiments aimed at developing an effective measurement method. Using the acquired experience in this period, another measurement campaign was carried out on the tram tracks in Gdansk. The main goal of these measurements was to check how the new assumptions regarding the method of mounting the antennas as well as their placement on the measuring platform will work in various field conditions. For this purpose, ten sets of GNSS receivers offered by two independent manufacturers – currently market leaders – were used. The choice of testing track section made it possible to analyze the repeatability of results obtained from multiple measurements in conditions of varying GNSS signal availability. The article presents in a synthetic way the course of this research and the obtained results. Keywords: Tram track; Satellite measurements; Accuracy analysis

scholarly journals A Method for Determination and Compensation of a Cant Influence in a Track Centerline Identification Using GNSS Methods and Inertial Measurement

2019 ◽  
Vol 9 (20) ◽  
pp. 4347 ◽  
Author(s):  
Wladyslaw Koc ◽  
Cezary Specht ◽  
Jacek Szmaglinski ◽  
Piotr Chrostowski
Keyword(s):  
Local Coordinate System ◽  
Target Position ◽  
Satellite System ◽  
Railway Track ◽  
Inertial Measurement ◽  
Track Geometry ◽  
Method Of Calculation ◽  
Mobile Satellite ◽  
Global Navigation Satellite ◽  
Geometric Layout

At present, the problem of rail routes reconstruction in a global reference system is increasingly important. This issue is called Absolute Track Geometry, and its essence is the determination of the axis of railway tracks in the form of Cartesian coordinates of a global or local coordinate system. To obtain such a representation of the track centerline, the measurement methods are developed in many countries mostly by the using global navigation satellite system (GNSS) techniques. The accuracy of this type of measurement in favorable conditions reaches one centimeter. However, some specific conditions cause the additional supporting measurements with a use of such instruments as tachymetry, odometers, or accelerometers to be needed. One of the common issues of track axis reconstruction is transforming the measured GNSS antenna coordinates to the target position, i.e., to the place between rails on the level of rail heads. The authors in their previous works described the developed methodology, while this article presents a method of determining the correction of horizontal coordinates for measurements in arc sections of the railway track. The presence of a cant causes the antenna’s center to move away from the track axis, and for this reason, the results must be corrected. This article presents a method of calculation of mentioned corrections for positions obtained from mobile satellite surveying with additional inertial measurement. The algorithm presented in the article and its implementation have been illustrated on an example of a complex geometric layout, where cant transitions exist without transition curves in horizontal plane. Such a layout is not preferable due to the additional accelerations and their changes. However, it allows the verification of the presented methods.

scholarly journals Analytical design method of reverse curves

2016 ◽  
Vol 2016 (6) ◽  
pp. 14-25
Author(s):  
Władysław Koc
Keyword(s):  
Design Method ◽  
Railway Track ◽  
Mathematical Notation ◽  
Satellite Measurements ◽  
New Approach ◽  
Analytical Design ◽  
Circular Arcs ◽  
Mobile Satellite ◽  
Transition Curves

The paper deals with a new approach relating to the design of the region of railway track direction alteration adapted to Mobile Satellite Measurements technique. The method may be particularly useful in situations when both the straights of the route directions cannot be connected in an elementary way using a circular arc with transition curves; this also refers to the application of a compound curve. Thus the only solution becomes the application of two circular arcs of opposite curvature signs to the geometric system, i.e. the use of an inverse curve. The solution of the design problem takes advantage of a mathematical notation and concentrates on the determination of universal equations describing the entire geometric system. This is a sequential operation involving successive parts of the system. The presented method has been illustrated by appropriate calculation examples.

scholarly journals The Continuous Monitoring of Selected Railway Structures using the Autonomous Data Logger

2020 ◽  
Vol 22 (2) ◽  
pp. 88-96
Author(s):  
Dusan Janostik ◽  
Viktor Nohal ◽  
Herbert Seelmann ◽  
Jaroslav Smutny
Keyword(s):  
Czech Republic ◽  
Continuous Monitoring ◽  
The Other ◽  
Measuring System ◽  
Dynamic Parameters ◽  
Data Logger ◽  
Line Managers ◽  
The Czech Republic ◽  
Railway Line ◽  
Railway Infrastructure

This contribution focuses on issue of the autonomous monitoring of selected dynamic parameters of the railway lines test sections under conditions in the Czech Republic. Description of the possibilities of such data collection, including the designed hardware and software, is a part of this contribution. At the same time, the contribution describes application of such a measuring system, comparing the selected dynamic parameters of the two types of switches, the first one was a switch with a standard fastening node, the other one with an elasticized fastening node. Recommendations and conclusions of railway infrastructure manufacturers and railway line managers are parts of this contribution, as well.

scholarly journals Design of compound curves adapted to the satellite measurements

2015 ◽  
Vol 34 (2) ◽  
pp. 37-49 ◽  
Author(s):  
Władysław Koc
Keyword(s):  
Design Problem ◽  
Local System ◽  
Railway Track ◽  
Satellite Measurements ◽  
New Approach ◽  
Circular Arcs ◽  
Main Track ◽  
Mobile Satellite ◽  
New System

The paper deals with a novelty related to the design of a region for an alternative railway track direction adequate for mobile satellite measurements. The new approach may become particularly useful in the design of the existing track axis control when the determination of both the main track directions becomes impossible. The only solution in that case is to apply to the geometrical system two circular arcs of a different radius, namely, to take advantage of compound curves. In the presented method the design of a new system is carried out by the use of the local system of coordinates. The solution of the design problem is aided by mathematical recording and is based on the determination of some universal equations describing the entire geometrical system. This procedure takes place sequentially involving consecutive parts of the system. The method has been illustrated by an appropriate calculation example.

THE POSSIBILITIES OF RAILWAY LINE CONNECTION BETWEEN KAUNAS FEZ AND KAUNAS INTERMODAL TERMINAL

2017 ◽  
pp. 47
Author(s):  
Artūras Glušakovas ◽  
Aidas Aurelijus Ganelinas ◽  
Simona Jankauskaitė
Keyword(s):  
Road Transport ◽  
Railway Track ◽  
Railway Line ◽  
Free Economic Zone ◽  
Railway Infrastructure ◽  
Reduced Costs ◽  
Economic Zone

Throughout the last decade, development in the logistics sphere is clearly visible. New logistics centers are being built. Trains, ships and road transport transfers cargos every day. Research shows that apparently in Lithuania most developed transportation method is car transport (Palšaitis, 2005). However, modernization of railway track and railway infrastructure, allows more and more companies to choose transportation by railways, which can help distribute cargos in bigger quantities and significantly reduced costs (Vilkevičius, 2012). Therefore this article tries to reveal the need for railway connection between Kaunas Free Economic Zone and the Intermodal Terminal of Kaunas and its future benefits.

scholarly journals The Analysis of Tram Tracks Geometric Layout Based on Mobile Satellite Measurements

2017 ◽  
Vol 3 (4) ◽  
pp. 214-226 ◽  
Author(s):  
Cezary Specht ◽  
Wladyslaw Koc ◽  
Piotr Chrostowski ◽  
Jacek Szmaglinski
Keyword(s):  
Satellite Measurements ◽  
Mobile Satellite ◽  
Geometric Layout
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