FUTURE CHALLENGES TO AXLE COUNTING SYSTEMS by Martin Rosenberger ASPECT CONVENTION 2012 Frauscher Sensortechnik GmbH 2012
Agenda 1. History of track vacancy detection - the basis of safe train management - 2. Challenges to Wheel Detection - Key component of Axle Counting System - 3. State of the Art Axle Counting Systems 4. Integrated Axle Counting Systems 5. Summary
History of track vacancy detection - the basis of safe train management - Systems for automatic track vacancy detection Track-circuits Axle counting technologies 1870 first system based on track circuits 1950 first axle counting system Today, many rail operator rely on axle counting Highly-avaiable and safe system Widest range of applications Based on high-end wheel detection technologies Low life cycle costs
Agenda 1. History of track vacancy detection - the basis of safe train management - 2. Challenges to Wheel Detection - Key component of Axle Counting System - 3. State of the Art Axle Counting Systems 4. Integrated Axle Counting Systems 5. Summary
Challenges to Wheel Detection - Key component of Axle Counting System - Wheel detection is basis for safe, reliable and available axle counting systems Mechanical loads (vibration and shock) Climatic constraints (temperature, humidity, snow) Rail temperature, track currents Magnetic field generated by track return currents Traction current commutation Electro-magnetic rail brakes, eddy current brakes Interfering magnetic fields generated by vehicles Vehicle geometris (effective ranges) Installation and mounting RSR 123 RSR 122 RSR 180
Agenda 1. History of track vacancy detection - the basis of safe train management - 2. Challenges to Wheel Detection - Key component of Axle Counting System - 3. State of the Art Axle Counting Systems 4. Integrated Axle Counting Systems 5. Summary
Functionalities of Axle Counting Systems Basic functionalities Fail safe clear/occupied message Reset (conditional, unconditional, etc. ) Benefits compared to track circuits Low maintenance Quick installation High availability Easy to modify Independent of traction and track conditions
Agenda 1. History of track vacancy detection - the basis of safe train management - 2. Challenges to Wheel Detection - Key component of Axle Counting System - 3. State of the Art Axle Counting Systems 4. Integrated Axle Counting Systems 5. Summary
Integrated Axle Counting System Serial interface between electronic interlocking and Digital Axle Counting System using Customized vital protocol Frauscher open vital protocol Providing more than just clear and occupied Additional functionalities Direction output Reset variants Diagnostic information
Architecture of Axle Counting System Centralised architecture
Architecture of Axle Counting System Decentralised architecture
Applications of Axle Counting Systems Main Lines Track vacancy detection on open lines and in stations Block proving systems Metros and Trams Continuous track vacancy detection Back-up system for CBTC Point changeover protection High-reliable changeover protection for points Level crossings Strike-in, release / clearance Shunting and industrial Line Track vacancy detection and switching tasks
Agenda 1. History of track vacancy detection - the basis of safe train management - 2. Challenges to Wheel Detection - Key component of Axle Counting System - 3. State of the Art Axle Counting Systems 4. Integrated Axle Counting Systems 5. Summary
Summary Wheel Detection Highly available inductive sensors Application of rail claw Extended sensor information (speed, wheel diameter, etc.) Standardisation and disclusrue of immunity levels Axle Counting Systems Economical and robust Customer-specific configuration Centralised and decentralised architectur Integration through serial customer-specific protocols for interlocking applications
Questions? Martin Rosenberger Sales, Head of Product Management martin.rosenberger@frauscher.com Frauscher Sensortechnik GmbH Gewerbestr. 1 4774 St.Marienkirchen AUSTRIA E: office@frauscher.com Your contact in UK: Richard Colman richard.colman@uk.frauscher.com Frauscher UK Ltd. Suite 5 Yeovil Innovation Centre Barracks Close Copse Road Yeovil Somerset BA22 8RN UK