ERTMS Solutions TVMLifeCheck - Technical presentation

The TVMLifeCheck (TLC) enables full diagnose of TVM430 Systems.
As the BaliseLifeCheck, it is a lab on wheels and can be embedded in test vehicles, as to automate maintenance, and enable predictive maintenance on the long run of installed TVM430 trackside systems.
It is a moving laboratory, automating the balise maintenance for Infrastructure Managers. The TVMLifeCheck is able to produce extremely detailed signal quality information when it passes over a TVM track circuit or condensator.
In the past, such signal quality information was not available.
Contact us to receive in-depth information about the TVMLifeCheck product ([email protected])

1. TVM Life Check [TLC] - A Technical Overview Emmanuel Fernandes, Hardware Engineering

2. 1/31/2017 2 TVM Life Check – Features Hardware Architecture Some Pictures Agenda

3. 1/31/2017 3 Goals: Offer an independent tool to test and measure TVM track circuits Modular approach in order to offer future expansions A tool entirely design and manufactured at ERTMS Solutions to be completely independent from track circuits manufacturers (CSEE/ANSALDO) TVM Life Check system is composed of the following six sub-systems: 1. TVM Life Check – Features TLC/ICC Module : to measure shunted track circuits currents | Icc | TLC/ ZT Module : to measure transversal impedances TLC/EPI : to measure EPI loops (TVM-300) TLC/ BSP : BSP loops measurement (TVM-430) TLC/ ODO Module : odometry module (Wheel Sensor/Doppler Radar, GPS- IMU ) TLC-SYS Module : (SOFTWARE) control and data analysis TLC-AMI/AMD : Alarms for corrective maintenance [OPTION] Under development

4. 1/31/2017 4 TLC/ICC: measurement of the track circuits shunted current by measuring the inductive magnetic field radiated by the currents on the rails. Icc shunted current at the first axle (as in the picture): Icc (f=1700, 2300, 2000, 2600 Hz) Icc TVM/2G or TGV/ PSB Sensors 1. TVM Life Check – Features

5. 1/31/2017 5 TLC/ICC – Measurement Targets for preventive and corrective maintenance: Minimal Level : verify that | Icc | > 0.8 A on all active segments except JES/JIC (or any other maintenance targets) Longitudinal crosstalk : verify that in the side segment | Icc | < 0.32 A (or any other maintenance targets) Transversal crosstalk : check that on adjacent tracks | Icc | < 0.16 A (or any other maintenance targets) F1 = 1700 Hz F2 = 2300 Hz F1 = 1700 Hz F2 = 2300 Hz F3 = 2000 Hz F4 = 2600 Hz F3 = 2000 Hz F4 = 2600 Hz Longitudinal crosstalk : F1, F2 presence in side segments on the same track Transversal crosstalk : between two different tracks 1. TVM Life Check – Features

6. 1/31/2017 6 Crosstalk illustration: 1. TVM Life Check – Features

7. 1/31/2017 7 TLC/ICC : Measurement methodology Simultaneous measurements of the four frequencies 1700, 2000, 2300, 2600 Hz on the same signal (on the same segment): Sampling time/measurement frequency: 1 ms (1 kSa /s) 1. TVM Life Check – Features

8. 1/31/2017 8 TVLC / ZT : Transversal impedances measurements – Detection of the compensation capacitors and JES elements. Icc Compensation capacitors Measured Icc with capacitors every 80/100m Icc on a non-compensated track 22 µF 1. TVM Life Check – Features

9. 1/31/2017 9 Purpose: Detect the presence of any transversal impedance : capacitors and JES elements like DB, BU, SVAC, SVPMM. [OPTION, under dev] Measuring the complex impedance Z of the transversal dipole  it is possible then to distinguish the transversal dipole and detect in a precise way the nature of the problem 22 µF Track circuit transversal dipole Impedance at 25 kHz [ W ] Compensation capacitor C=22 µF Z = -0.29i Bloc d'Accord F1=1700 Hz (BUf1) Z = 6.42i Bloc d'Accord F2=2300 Hz (BUf2) Z = -0.041i SVPMM (Self Mise au Rail Structure Métalliques ) Z = 51.8i Zt 1. TVM Life Check – Features

10. 1/31/2017 10 TLC/ ZT : Methodology Emission of a 25 kHz carrier 2. Reception of the 25 kHz after inductive coupling ANT TX  Track  RX ANT 1. TVM Life Check – Features

11. 1/31/2017 11 No transversal dipole present in-between the front and rear axles: In the eight-shaped RX antenna the EMF is zeroed due to the inverse loop windings I1 @ 25 kHz I2 @ 25 kHz I1 I0 @ 25 kHz I1 1. TVM Life Check – Features

12. 1/31/2017 12 I1 Zt I2 @ 25 kHz I1 I0 @ 25 kHz Transversal dipole in the middle of the RX antenna: EMF appears in the left side of the RX antenna  unbalance at the eight-shaped loop Maximal unbalance when the dipole is in the middle of the RX antenna Inductive magnetic field B is present here Inductive magnetic field B is NOT present here (or very week) I1 1. TVM Life Check – Features

13. 1/31/2017 13 Measuring the unbalance gives only the presence of the transversal element. The analysis needs a human intervention and some good expertise to make a diagnostic of the type of failure (like in the IRIS train). 1. TVM Life Check – Features

14. 1/31/2017 14 TLC/EPI: Measurement of the EPI (TVM-300) loops: The envelope (level of the signal) and the frequency of the loop carrier are measured. n° Hz 1 1318,4 2 1459,2 3 1600 4 1740,8 5 1881,6 6 2022,4 7 2163,2 8 2304 9 2444,8 10 2585,6 11 2726,4 12 2867,2 13 3008 14 3148,8 Central EPI sensor CW carriers : Each unique frequency codes a message (14 available) F=2444,8 Hz  track is clear 1. TVM Life Check – Features

15. 1/31/2017 15 When signal is present (Signal Detection), the instantaneous frequency is measured. One precise measure of the frequency quality/stability of the CW frequencies Possibility of detection of frequency/phase stability  this could have an impact on the message availability . 1. TVM Life Check – Features

16. 1/31/2017 16 BSP demodulator/decoder architecture Detection of BSP signal (carrier detection) Measurement of the two components 62.5 kHz and125 kHz Demodulation and bit extraction (4807,7 bits/s) ( Tbit = 208.0 µs) 1. TVM Life Check – Features

17. 1/31/2017 17 TLC- ODO : Odometry Module Two options are possible (requested by two different clients): A Wheel Speed Sensor sending +-90° phase shifted signals coding speed, distance and direction. An odometry re-calibration is performed each time the train passes exactly over some EPI/ BSP loops (significant elements on the track at well known position) If no wheel sensors  A GPS/ IMU (GPS + Inertial Measurement Unit). In both cases: a position re-calibration using well known fixed elements in the track ( EPI,BSP Loops, Balises, etc..) 1. TVM Life Check – Features

18. 1/31/2017 18 TLC/SYS: Control and Analysis module Powerful PC workstation containing: the Command and Control Unit [CCU] Signal Processing Unit [SPU] Alarms Management Unit [AMU] [OPTION under dev] Server (Workstation) Visualization Software 1. TVM Life Check – Features

19. 1/31/2017 19 TLC/AMI/AMD: Maintenance Alarm Module [OPTION] Possibility of real-time transmission using: SMS 3G/4G TCP/IP connections of detected alarms and values out of nominal values (depending on pre-defined maintenance targets) All alarm messages are geo-localized and timestamped 1. TVM Life Check – Features

20. 1/31/2017 20 2. TVM Life Check – Hardware Architecture Sub-systems installed in a 19” rack bay: UPS TLC - SYS TLV ICC / TLC – EPI/ BSP TVMLC – ZT Router GPRS /3G/4G TVMLC - ODO TVM SENSORS EPI/ BSP SENSORS ANT TX 25 kHz ANT RX 25 kHz Speed Sensors CONSOLE RACK 19’’ 230 V AC / 1000W

21. 1/31/2017 21 3. Some pictures Measurement of ICC shunted currents on the track – Two adjacent segments with 2000-2600 Hz frequencies

22. 1/31/2017 22 3. Some pictures Measurement when passing over an electrical joint (JES)

23. 1/31/2017 23 3. Some pictures A crossover: transversal crosstalk in visible at the switch

24. 1/31/2017 24 3. Some pictures Track circuit instantaneous frequency is also evaluated

25. 1/31/2017 25 3. Some pictures

26. 1/31/2017 26 3. Some pictures

27. 1/31/2017 27 TVM Life Check – Technical Presentation 3. Some pictures

28. 1/31/2017 28