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BS EN 13848-2:2020

BS EN 13848-2:2020

$189.07

Railway applications. Track. Track geometry quality – Measuring systems. Track recording vehicles

Published By Publication Date Number of Pages
BSI 2020 48
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This document specifies the minimum requirements for track geometry measuring principles and track geometry measuring systems in order to produce comparable results when measuring the same track. It applies to all measuring systems, attended or unattended, fitted on any vehicle, except those systems defined in EN 13848?3 and EN 13848?4. Only systems put into service after the standard comes into force are concerned.

This document does not define the requirements for vehicle acceptance.

This document does not apply to measuring systems dedicated to Urban Rail Systems.

PDF Catalog

PDF Pages PDF Title
25 6.3.4.3 Simplified validation
27 6.3.5 Verification of measuring runs (during operation)
6.3.5.1 Introduction
6.3.5.2 Comparison of different measurement systems on the same vehicle
6.3.5.3 Adjustment
6.3.5.4 Comparison with historical data
28 Annex A (informative)Frequency analysis
A.1 General description
A.1.1 Transfer function
29 A.1.2 Coherence function
A.1.3 Power Spectral Density (PSD)
A.2 Practical calculation
30 A.3 Applications within this standard
A.3.1 Comparison between two runs
A.3.1.1 Transfer and coherence functions
31 A.3.1.2 Power Spectral Density (PSD)
32 A.3.2 Cross check
33 Annex B (informative)Principles of measurement
B.1 General description
B.2 Longitudinal level and alignment
B.2.1 Chord measuring system
B.2.2 Inertial measuring system
B.3 Track gauge
34 B.4 Cant
B.5 Twist
35 Annex C (normative)Description of field tests: values to be respected
C.1 General
C.2 Repeatability
C.2.1 Statistical analysis of parameter data
36 C.2.2 Frequency analysis
37 C.3 Reproducibility
C.3.1 Statistical analysis of parameter data
C.3.2 Frequency analysis
38 C.4 Cross check
C.4.1 General
C.4.2 Transfer function
39 C.4.3 Coherence function
40 Annex D (informative)Track geometry measurement uncertainty
D.1 General
41 D.2 Evaluating uncertainty for track geometry measurement systems
43 D.3 Measurement uncertainty: limit values
45 Annex E (informative)Cross checks in the space domain

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BS EN 13848-2:2020
$189.07