Certification mark PPP 80012
Systems for the exact identification of infrastructure objects along railway tracks
Subject of audit:
Accuracy and reliabilty of systems for the exact identification of facilities along railway tracks. Furthermore the systems are evaluated concerning their suitability for tunnel measurement.
Examination based on:
The certification mark is awarded within the framework of voluntary testing and certification based on predefined test criteria. Test measurements are conducted on behalf of a test vehicle on an approved railway track .
Therefore measurement points are attached at particular positions alongside of the railway track which are exactly determined by means of GPS-RTK recording. These measuring points are the basis for the determination of the measurement accuracy.
Examination emphasis is thereby on:
1. Determination of measurement accuracy:
- recording of measured data
- evaluation and analysis of measurement data
- behaviour under impacts like:
- shadowing effects
- multipath scattering
- loss of GNSS signals
- acceleration and deceleration phase
- calculation of measurement accuracy
- calculation of relative measurement accuracy according to DIN ISO 5725-2:2002
- calculation of absolute measurement accuracy according DIN ISO 17123-8:2003
- evalustion of the system in regard its' suitability for tunnel measurement
2. Reliability:
- system failure
- incorrect measurements
- identification of errors
- protection of hardware components
3. Data type:
- data type for import (e.g. list of facilitites)
- data type for export (e.g. MS-Excel, TXT, AutoCAD, ESRI Shape)
- functionality
- conformity of formats
