ECS-LAC - Tramway Pantograph Monitoring System

ECS-LAC is a UNIQUE solution capable of detecting and authenticating streetcars. It analyzes pantograph and carbon strip integrity in real time, and generates a report only when an anomaly is detected, avoiding unnecessary data. 

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ECS-LAC, Yumain's DSP with on-board AI for monitoring and analyzing pantograph status

The numerous checks required before a pantograph can be put into service in the urban environment, and the impact of damage on the operator, have led to the need for a device that can detect pantograph damage as early as possible.

Yumain's ECS-LAC solution is an innovative pantograph monitoring device that addresses several key issues linked to pantograph maintenance in the urban sector. It is very compact and can be installed on a dedicated gantry, requiring only a connection to the electrical network to operate. What's more, the ECS-LAC is able, via AI, to detect the ID of the tramway being analyzed, making it possible both to track its progress and to avoid having to carry out these searches by hand once an anomaly is detected.

Only useful information in one place: ECS-View

ECS-LAC provides essential support to operators and maintenance managers faced with voluminous data management in their CMMS software, thanks to the use of on-board AI, which retrieves only useful information and therefore facilitates data analysis by creating a targeted, easily exploitable spectrum of data.

What's more, all retrieved data is stored and archived in an easy-to-access and easy-to-use tool, ECS-View, making it possible to centralize data for efficient consultation. 

dashboard ecs view

An ECS-VIEW demo is available online

image multiplication controles

Reduced costs

The ECS-LAC is the key for operators and maintenance managers who wish to multiply control points, thanks to its considerably lower cost than alternatives on the market, enabling them to create a larger control network, while also ensuring that anomalies are tracked over time and on the move.

Instant, early detection of anomalies

ECS-LAC is also an essential support for operators and maintenance managers wishing to keep their systems in optimum operating condition, thanks to its ability to anticipate unforeseen incidents through early, real-time detection of anomalies, enabling proactive management of interventions to ensure trouble-free operation.

image pantographes tramway

ECS-LAC, with the AI embedded in its sensor, brings a wealth of benefits

Compact, self-contained product with quick and easy commissioning

Operates on streetcars in service, but also at depot entrances and exits, so there's no need for routine manual inspections

A solution at a lower cost than other solutions, allowing the multiplication of control points on the rail network

Only useful information with detailed reports. All centralized in an easy-to-use and efficient tool, ECS View.


installation sur site ecs lacExample of on-site installation

ecs lac

Device image 

Find out more about this innovative solution

To detect the non-conformity of a pantograph (raised or not) on a train running under a sensor, the system will rely on a combination of image analysis and on-board algorithms based on artificial intelligence.

The arrival of the train will be identified either by image analysis (Sigma/Delta technology), or by an external sensor (the device authorizes 2 inputs via dry contact).

Train identification can be performed either by:

  • Reconciliation of the time-stamped event with the operator's train schedule database
  • Locating and reading the train identification plate (if located on the front panel)
  • Any other signal (radio) to authenticate the train

The location and analysis of all pantographs (deployed or not) present on the railcars is fully automatic and in real time (< 5 minutes). If an anomaly is identified, an alarm is immediately generated:

  • dry contact (2 outputs) to power a local PLC.
  • a time-stamped email with photos of defects
  • a complete message via FTP and Ethernet or wifi connection.

This information can also be stored and time-stamped for statistical purposes, as well as to supply the QSE manager with useful indicators.

Thanks to its fanless design, this solution requires no maintenance.

Installation on a mast, on a wall or on track gantries are the most common solutions.

This device includes all the elements required for its operation and installation: an "Edge Computing" solution. In its basic version, it requires only an external power supply + connection to a 4G modem. A local connection to a customer's processing unit is also possible.

In view of the various possible installation configurations, the devices can be powered in several ways:

  • By permanent power supply (240 VAC)
  • Via DC power supply
  • By solar panel

The sensor is designed for outdoor use (IP 57)

Night-time use of the device is currently only possible with the basic offer.


4,5 kg.

Size excluding mounting and power supply unit (WxHxD) 

21 x 12 x 18 cm.

Power consumption
Supply voltage

16 W

12 or 24 VDC

Detection distance

2 to 10 metres 

Installation angle 

between 40 and 50° from the horizontal. 


CEM EN 61000-6-2

Railway applications / EMC: EN 50121-4:2006/AC:2008

IP standard

IP54 to IEC/EN 60529 

Detection environment 

Exterior by day, or by night with LED lighting. 

Operating temperature 

-10°C to 50°C


In line with the track to be monitored (on gantry) 

Time required for installation 

< 2 hours

On-site calibration time 

< 1 hours

On power-up, the system is operational in less than 

2 minutes

Noise generated by the system 

0 db (Fanless)

Equipment lifetime 

10 years 

Warranty period 

2 years 

The device is easily accessible and removable, without the need for catenary consignment or stopping train movements. 



Typology of objects detected (image trig)

Train front, Train roof, Pantograph, Archer, Horns, Contact strips

Influence of train acceleration/deceleration


Minimum distance between 2 pantographs

0 meters

Pantograph detection/analysis


Detection/Analysis pantograph down


Analysis of the thickness of each carbon strip

Yes (in %)

Cracks and grooves all over the carbon belts.

Yes (size > 5mm.)

Measuring the archer's trim angle


Absence or presence of horns


Maximum time from pantograph detection to end-user analysis results

20 s.

On-line analysis HMI interface (Full Web)

Yes: see "ECS-View

Annual preventive maintenance workload

< 3 h.H (optical cleaning not required)

Corrective maintenance workload per intervention

< 1 hours

The system is equipped with self-diagnostic capabilities, and data is automatically transmitted to the ground.


The device is easily accessible and removable, without the need for catenary consignment or stopping train movements.


Spare parts list for on-site maintenance.


5- and 10-year hardware and software maintenance contracts.






Certificates and instructions for use are available on request. To do so, go to the contact page by clicking on

Yumain online store

Our online store is now available. Here you can find all our railway-related products.

It's also a useful tool: on request, your basket can be sent to you in the form of a quote!

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On January 19, 2021, the E.C.S. Product with its pantograph detection and analysis application won us the Embedded Trophy in the Industry & Services IoT category.

This award was presented to us by CEA-List, a partner who has been with us since the beginning and recognizes Yumain's skills in embedded AI.

Trophée détourée de l'embarqué IOT industrie & services décerné a Yumain



OCS2 is a French company specializing in the supply of railway equipment and catenary installations.

Contact OCS2:

Manager: Jérôme Anselme 

ZA La Petite Champagne 

14 rue des Cerisiers 


Email :

Phone : +336 7928 9281

visuel ecs lac

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