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Webinar: High-voltage Pantograph Overhead-line Monitoring Using a Fiber-based Measurement Chain

Continuous monitoring of contact forces and acceleration between pantograph and catenary in regularly operated railway vehicles is fundamental for a modern predictive maintenance approach. For a safe and accurate measurement on high voltage levels, we recommend a purely optical measurement chain. Acquiring optical sensor information in parallel to vehicle bus signals and position sensing (GNSS) allows you to build a graphical map of your infrastructure and its need for maintenance.

This webinar will discuss the complete setup of the solution including:

  • Best approach for system design
  • Used components
  • Advantages of modern optical interrogators

Date: 2020 May 12th | 10:00 AM CET

Instructors: Dietmar Maicz

Duration: 1 hour

Language: English

Black and white portrait of a man's silhouette
Dietmar Maicz

Railway Monitoring Specialist

Questions from Webinar Participants Answered by Dietmar Maicz

This was not tested and needs additional consideration. If the force difference is big enough it should be possible in principle.

The products are available for sale on a project basis. Additional to the sensor’s connectors, connector boxes, etc. are also needed and differ depending on the integration possibilities. Please send us your project requirements.

A camera was not installed because of the issue of the lens soiling. But for other applications, using the QuantumX/catman product family, we do use cameras. Recording of compressed video streams from Ethernet cameras as well as Windows® DirectShow cameras are supported.

The thermal effect is compensated by the sensor body design.

We have observed, that the most robust approach to determine faults are the force values.

HBM provides APIs for direct access to the data stream. For clock synchronization, PTP is recommended, but other protocols are also available.

For more details visit: Precision Time Protocol and Drivers for Compability with Third Party Software

Accurate and reliable data are the basis for these kinds of systems. The integration in the maintenance regime with a rapid response to trends and events is also very important. Starting with the biggest faults in the network, a relatively fast and higher general quality level can be reached.

The optical eight optical channels are recorded with 1kHz and stored in an 8 byte resolution.

Frequency of sensor calibration is necessary depends on the application and quality assessment requirements. In principle, it can be handled like all other force sensors.

There is no protection for the sensors because of the fibre optical principle they are not influencing the measurement result.

All the sensors are available for sale and offered on a project basis, because of typically additional clarifications are needed for integration.

Yes, using an IMU is a possible solution.

By using IEEE1588:2008 (PTPv2). 

For more details please visit our website.

If you use the MXFS fibre optical Interrogator and IEEE1588:2008 (PTPv2), it is typically bellow 100ns.

The division by zero point is set to the last non division by zero value.

The optical interrogators from HBK (DAQ) needs to be connected to a PC for configuring and data saving. There are models, however, that can be then disconnected from the PC and operate as standalone and record data internally (FS22 Static).

Check for further details on our product page FS22 Industrial BraggMETER.

There are two approaches:

  1. Additional measurement sensors for determining the aerodynamic force/lift (and the vertical displacement) can be connected to the QuantumX module (ground potential). Due to the product family approach (it is hybrid), fully synchronized systems are no problem.
  2. An additional optical force sensor can be used to measure the aerodynamic force instead of one of the accelerometers, also at high voltages.

Force transducer – FS66HDL (Heavy Duty Fibre Optical)

Accelerometer – FS65HDA (Heavy Duty Fibre Optical)

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