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Accelerometer for railway

The transportation system lies at the backbone of the civilized world, with the railway system being its most crucial component. As such, progress in this field has determined more and more high-tech sensors to be incorporated into trains and the infrastructure of the railways in order to ensure a proper evolution of this means of transportation. Not only do these sensors monitor the status of the trains and tracks, guide and control the train, facilitate repair planning and reduce maintenance costs, but they are also meant at improving aspects relating to passenger safety and comfort.

Accelerometers represent a large part of these sensors and they are used to monitor several types of mechanical motions such as inertial force (acceleration), tilt (inclination), vibration and shock.

Colibrys produces accelerometers based on silicon MEMS capacitive sensors, which come as a high-tech alternative to conventional accelerometers and offer higher performances in terms of size, power, reliability, long-term stability, signal to noise and robustness. By combining integrated circuit processing with specific MEMS processes, we produce microscopic mechanical structures fit for today’s ever-evolving field of railway transportation.






The need for reliable accelerometers

Most countries have a constantly evolving railway market, which is most often defined by the deployment of new generations of high-speed trains and specific infrastructure. These trains require high-tech on-board monitoring and control equipment fit to provide accurate readings about the status of the train, its carriages and the tracks. Such systems are based on reliable and high-specification accelerometers, which are crucial when it comes to guiding and controlling the vehicles, reducing maintenance costs and facilitating repair planning and also ensuring the highest safety and comfort standards.


The MEMS revolution

Although there are many sensing technologies (capacitive, piezoelectric, piezoresistive, etc.) competing to provide the best solution to the needs of today’s railways, none offer the same level of performance in terms of long-term stability, temperature stability and precision as MEMS capacitive products, which are not only qualified for safety critical applications, but are also designed to operate in harsh environments.


Specific railway applications for our accelerometers

Colibrys MEMS accelerometers have a wide range of applications in the railway system, with the most common ones being:


Colibrys – on the fast track to innovation

Colibrys MEMS capacitive accelerometers are renowned for their high reliability under harsh conditions and have been successfully qualified for safety critical railway applications.
One of our most resonating achievements was the Colibrys sensors to be successfully qualified for the latest generation of German ICE high speed trains. The Velaro D train is the fourth generation of interoperable high-speed trains made by Siemens using distributed traction and the first integrating innovative bogie monitoring systems. Download the Press Release


Colibrys accelerometers for railway applications

  • The new Colibrys VS1000 – a new reference for low to medium frequency MEMS sensing (DC 0 Hz to 1500 Hz) – offers the best performance stability with shock resistance, as well as the lowest non-linearity and noise in the marketplace. Each product is fully tested and qualified to the highest Colibrys standards. It embeds a self-test function for your confidence at all time.
  • The legacy Colibrys VS9000 – the trusted MEMS for the most demanding applications involving vibration sensing since 2008 – it offers large frequency response and performance stability, as well as low power consumption.
  • The MS9000 and MS9000P products are designed for inertial measure specially for train and metro positioning which requires long-term bias stability..