Information on documents

The Scientific and Technical Collection of Czech Railways is a Collection of Papers (“VTS ČD”) from the field of railway transport. Its aim is to enable publishing of especially original specialised works dealing with technical and technological challenges and principal issues in such areas as management, economy and ecology regarding railway transport.

 

1997 / 03

DIAGNOSTICS MEANS OF MEASUREMENT OF QUALITY OF ČESKÉ DRÁHY TRACK GEOMETRY

The aim of the article is to describe two new diagnostics railway vehicles designed for the measurement of parameters of the track geometric position, namely a measuring track motor car for measurements on lines of class 2 and 3, and a measuring car for measurements of the track geometric position, track surface defects, track cross profiles, and for the determination of the railway vehicle response on modernized lines.


 Document of the article


 Štefan Mayerberger  Bohumil Vančura

DIAGNOSTICS IN THE SIGNALLING

Diagnostic devices, jigs and methods in the repair sphere of the signalling technics become at present a necessity to maintain the required quality of repairs. Therefore, the article describes and summarizes some aspects of the knowledge and experience arising from the development and operation use of diagnostic devices in the railway protection technology. The article stresses the fact that the most efficient diagnostic methods are performed in modern computer orientated systems. The diagnostics of the relay signalling devices used until now can also be performed without problems using the present technical tools, however, the economic efficiency of such solution should be carefully considered and documented.


 Document of the article


 Ivan Konečný  Libor Lochman

DIAGNOSTICS OF THE TRAIN SAFEGUARD

The article deals with the diagnostics of a line train safeguard operated on the ČD network. Its first part introduces the problematics and present situation in the diagnostics of the station any part which is carried out during the usual operation. The second part introduces a new testing device - ZZLVZ 91.1, which is especially designed for the diagnostics of the train safeguard mobile part at the places of the operation treatment of driving cars.


 Document of the article


 Karel Peška

DIAGNOSTICS IN THE JSPD DATA NETWORK

The article deals with the protocols used in the ČD data network (X.25, Frame Relay, TCP/IP). It compares the diagnostic possibilities of individual protocols. A part is devoted to the bit error rate and its effect to the block fault rate with regard to the situation in ČD. Specifically, the values which can be acquired in the ČD data network nodes are mentioned.


 Document of the article


 Arnošt Dudek  Zdeněk Vomočil

DIAGNOSTICS OF THE PRACTICABILITY AND GEOMETRIC POSITION OF THE ČD TROLLEY SYSTEM

The article deals with a catenary measuring car. The car measures the trolley wire stagger and height. During measurements the car registers the swings of its body and corrects the above mentioned measured values of the trolley wire stagger and height by the swings of the car body. The article analyses the results of and experience arising from measured data and their use in the maintenance.


 Document of the article


 Josef Konvičný  Jiří Kaštura  Libor Zátopek  Marcela Šaňková

PROTECTION OF EMBEDDED DEVICES AGAINST NEGATIVE EFFECTS OF STRAY EARTH CURRENTS

The article describes in an encyclopedic form the legislative and technical measures for the protection of conductive embedded devices and structures against the effects of direct stray earth currents. The preventive activities performed by a ČD specialized workplace are stressed. The specialized workplace also provides for technical development tasks and cooperates at their solving.


 Document of the article


 Ivo Laníček  Jan Matouš  Karel Černovský

FAILURE OF HEAT TREATED SPRING STEELS IN THE ČD OPERATION

Determination of the state of stress using the method of finite elements and failure characteristics of materials. Prediction of expansion of the fatigue failure in the spring steel elements (the contribution for the diagnostics should be seen there).


 Document of the article


 Jan Kout

VTS 03 - Complete Issue

Resume of the Anthology No. 03