BS EN 13848-1:2019 pdf free

BS EN 13848-1:2019 pdf free.Railway applications – Track – Track geometry quality Part 1: Characterization of track geometry.
6.1.2 Measurement method
Track gauge can be measured using a contact system or a non-contact system.
6.1.3 Wavelength range
Not applicable.
6.1.4 Resolution
The values of resolution depend on the type of measuring system and are given in the corresponding parts of the standard EN 13848-2, EN 13848-3 and EN 13848-4.
6.1.5 Measurement uncertainty
The values of uncertainty depend on the type of measuring system and are given in the corresponding parts of the standard EN 13848-2, EN 13848-3 and EN 13848-4.
6.1.6 Range of measurement
The range shall be the nominal gauge -15 mm/+50 mm.
6.1.7 Analysis method
Individual defects are represented by the amplitude from the nominal value to the peak value
(minimum and maximum peak value).
6.2 Longitudinal level
6.2.1 General
Longitudinal level is the deviation Zii in z-direction of running table levels on any rail from the smoothed vertical position (reference line) expressed in defined wavelength ranges. The smoothing is applied over a length that covers the wavelength range of interest (minimum two times the upper limit of the wavelength range of interest). The reference line and the longitudinal level are calculated from successive measurements (refer to Figure 6).
6.2.2 Measurement method
Longitudinal level measurements shall be made with either an inertial system or a versine system (that should preferably be asymmetric) or by a combination of both methods. If the versine method of measurement is used, a decolouring of the measured signals is necessary in order to eliminate the influence of the transfer function of the versine system (see Annex A).
When measuring in the DO domain, the sampling distance should be reduced to 0,1 m. Due to the lack of
experience in this domain no additional requirements are given presently.
The filters used for calculating DO, Dl, D2 and D3 shall comply with the requirements of Annex C.
6.2.4 Resolution
The values of resolution depend on the type of measuring system and are given in the corresponding parts of the standard EN 13848-2, EN 13848-3 and EN 13848-4.
6.2.5 Measurement uncertainty
The values of uncertainty depend on the type of measuring system and are given in the corresponding parts of the standard EN 13848-2, EN 13848-3 and EN 13848-4.
6.2.6 Range of measurement
The requirements are specified in Table 2.BS EN 13848-1 pdf free download.