1. IOT & Railway rolling stock
Enabling monitoring of OLDER fleets
SNCF – rolling stock Engineering dept.
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

2. VISION : New maintenance organiSation
SMART TRAIN
Better knowledge of operating condition 1
CLOUD
Improvement of data quality 2
CORPORATE IT
Lifecycle management optimisation 3
WORK ORDERS
ANALYTIcs
Data-driven process 4
ASSET MANAGEMENT SYSTEM
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

3. Getting data from legacy fleets
Sensors
Capteurs intégrés au matériel roulant
Fully integrated to the train control (or maintenance) system
Sensors not interfering with train systems, except power supply
Sensors not interfering with train systems
Connectivity
Wireless to an on-board communication gateway
Direct network connectivity with LPWA
Wired to an on-board train network
Cost of the 1st data stream
Very high except new train or heavy overhaul
Moderate: power feed and gateway integration
Lowest cost for single sensor use case
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

4. Connecting older fleets : 4 main categories
Tank level monitoring
Remote log retrieval 1 2
Fuel, sand, water, oil…
Operations management
Enable anticipation
Connect maintenance plugs of control units
Cost reduction
Reliability
Availability
Operating hours count
Health monitoring of critical systems 3 4
Telematics on significant devices
Cost reduction
Better maintenance planning
Monitoring critical thresholds: temperature, vibration level, peak current…
Reliability
Cost reduction (avoid heavy repair)
Murphy law tells us that there’s always a problem.. That’s why it’s important to have the data…
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

5. Use case : water level monitoring
ISSUES Toilets availability &
Delayed trains
Replenishment management
Communication every 30 minutes
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

6. Implementation : 4 trainsets – 9 months
Pressure sensor on the bottom of the tank
Transmission: off-the-shelf LPWA modules
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

7. Data Transmission – lessons learned
IN-MOTION TRANSMISSION
SIGFOX : Tests have shown that there is no in-motion (> 30km/h) data transmission
Better with LORA, capability up to 100 km/h, depending on network
STATIC TRANSMISSION
6273 of 6440 messages correctly received (97,40% success)
position R1 R2 R3 R5 R6 R7 R8
Signal (dBm)
- 118,4
- 117,4
-118,4
- 116,7
- 117,3
- 115,5
- 116,5
Bad ( below -136 dBm)
<1%
Good (-135 to -123 dBm)
32%
Excellent ( -122 dBm):
67%
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

8. Tank level monitoring results (1)
WATER LEVEL PER CARBODY
trainset #720 R1 R2 R3 R5 R6 R7 R8
Mean level
84%
80%
79%
81%
76%
70%
Minimum level
47%
15%
13%
34%
35%
25%
0%*
Conclusions (1)
Overall mean level of water tank is 80 %. This could allow to suppress unnecessary replenishments.
Low level still exists, can be and were flagged thanks to monitoring, before assigning the TGV on a commercial journey.
SNCF - Rolling Stock Engineering dept.
Friday, 21 September 2018
MARCH 20th, 2017

9. Tank level monitoring results (2)
WATER LEVEL OVER TIME
Water consumption vary significantly depending on toilet’s location. This was expected.
Water replenishment vary significantly depending on toilet’s location. This was less expected !
Conclusions (2)
Replenishments being charged, but not “full-filled” !  contract management
Especially in-station replenishment most expensive & lest effective
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

10. CLIENT’S BENEFITS SUCCESSFUL EXPERIMENT !
better efficiency through better knowledge
FIELD DATA MAY IMPROVE TRAIN DESIGN
Mean water consumption / hour for each toilet position
Systematic water loss after replenishment (5% - 11%) (tank design)
SUCCESSFUL EXPERIMENT !
Monitoring currently being implemented on 30 TGVs (Paris-Lyon)
Extension to all TGVs with clear water toilets in preparation
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

11. Is everything that easy ?
Limits of consumer electronics
On-board railway systems meet specific needs
Passenger’s safety (fire & smoke regulations)
Reliability and maintenance cost through compliance with standards for EMI, vibration, maintainability …
Strategy : going for a railway-ready communication node & gateway
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

12. As a conclusion: It’s a beginning ! Real opportunities with IOT
Pushing forward with more data
Moving the organisation
SNCF - Rolling Stock Engineering dept.
MARCH 20th, 2017

13. Q & A
SNCF - Rolling Stock Engineering dept.
December 7th, 2016