rolf dollevoet, tu delft - railway engineering

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Railway Engineering Dutch Power

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Page 1: Rolf Dollevoet, TU Delft - Railway Engineering

Railway EngineeringDutch Power

Page 2: Rolf Dollevoet, TU Delft - Railway Engineering

Group: Railway Engineering, TU Delft

1949 – 2006 chair:

Van Veen, Cuperus, Van Bilderbeek, Van Witsen, Esveld

2006 – 2012:

Chair vacancy….

2012 > chair:

Dollevoet (part-time TU Delft and ProRail (Dutch infra manager Railway))

Challange and focus: more for less money, and interfaces research

Group: 13 staff members, 18 PhD’s, 1 PDEng, 4 Postdoc’s,

6 guest researchers

Page 4: Rolf Dollevoet, TU Delft - Railway Engineering

Page 5: Rolf Dollevoet, TU Delft - Railway Engineering

Page 6: Rolf Dollevoet, TU Delft - Railway Engineering

Page 7: Rolf Dollevoet, TU Delft - Railway Engineering

Page 8: Rolf Dollevoet, TU Delft - Railway Engineering

Page 9: Rolf Dollevoet, TU Delft - Railway Engineering

Page 10: Rolf Dollevoet, TU Delft - Railway Engineering

Remote Sensing satellites

Remote Sensing: Microwave

400 nm

700 nm

1 mm

2.5 cm3.7 cm7.5 cm15 cm30 cm75 cm

Wavelength

Visible light

Infrared

Microwaves

Ultra-high frequency

XCSL

P

Used by satellite-borne radar

Used by airborne radar to see below Earth’s surface

lMicrowave in all weatherCentimeter wavelength millimeter measurement precision

Page 11: Rolf Dollevoet, TU Delft - Railway Engineering

1st passAt time t1

Satellite measurement:• Amplitude – record the ground

target reflection • Phase – record the location/motion

of the ground targets [-π +π]

Page 12: Rolf Dollevoet, TU Delft - Railway Engineering

Satellite measurement:• Amplitude – record the ground

target reflection • Phase – record the location/motion

of the ground targets [-π +π]

calculate the phase difference between t1 and t2 -- the settlement value is obtained

2nd passAt time t2

Satellite Radar Interferometry (InSAR) techniques

f1,2

Page 13: Rolf Dollevoet, TU Delft - Railway Engineering

Q: Can these satellites observe every ground object in railway infrastructure environment?

TrainRailsEmbankmentPolesCatenarySleepersSquat GrassTree …

Page 14: Rolf Dollevoet, TU Delft - Railway Engineering

Q: Can these satellites observe every ground object in railway infrastructure environment?

TrainRailsEmbankmentPolesCatenarySleepersSquat GrassTree …

Page 15: Rolf Dollevoet, TU Delft - Railway Engineering

Gas field

(‘risk’ to be defined by end user)

Radarsat-2 data [2010.06 – 2015.08]

ExampleRisk-map

Page 16: Rolf Dollevoet, TU Delft - Railway Engineering

Rotation matrices:

LOS-vector decomposition

Page 17: Rolf Dollevoet, TU Delft - Railway Engineering

Linking the satellite reflections to assets.

Using laser scanning data, link every satellite measurement to a specific asset.

Page 18: Rolf Dollevoet, TU Delft - Railway Engineering

2 – 5 years 5 – 10 years 20 years 50 years

Atrain

Page 19: Rolf Dollevoet, TU Delft - Railway Engineering

Thanks to my COLLEGUES !