ASSESSMENT of PANTOGRAPH LOSS-of-CONTACT TRANSIENTS A FOLLOW-UP - - PowerPoint PPT Presentation

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JRC2017-2270 ASSESSMENT of PANTOGRAPH LOSS-of-CONTACT TRANSIENTS A FOLLOW-UP Bih-Yuan Ku & Guan-Ru Chen Taipei University of Technology Taipei, Taiwan Joint Rail Conference - April 4 - 7, 2017 1 Philadelphia, 2017 JRC2017-2270

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ASSESSMENT of PANTOGRAPH LOSS-of-CONTACT TRANSIENTS A FOLLOW-UP

Bih-Yuan Ku & Guan-Ru Chen Taipei University of Technology Taipei, Taiwan

Joint Rail Conference - April 4 - 7, 2017 Philadelphia, 2017

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Contents Intr troducti tion Previo ious Work Arc Images Arc Intensity ty Sensin ing Conclu lusio ion

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Introduction ▶A follo low-up of previo ious work on Panto tograph arc assessme ment t ▶ Use both arc image and intensit ity detecti tion ▶ Refer to EN50119 Standards ▶ Examin minati tion of video clip ips and arc intensit ity data from m field ld tests ts

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Previous Work ▶ Previo ious paper in 2013 JRC “Quantitative measurement of pantograph loss-of-contact dynamics” ▶ First t presenta tati tion of arc intensit ity sensor for quantit itati tive assessme ment ▶ Combin ined with accele lerome mete ter and video camera for loss-of

  • f-conta

tact t monito torin ing

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▶ Previo ious paper in 2013 JRC Previous Work

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▶ Arc intensit ity sensor outputs ts in 2013 JRC Previous Work

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▶ Arc intensit ity sensor outputs ts in 2013 JRC Previous Work

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▶ Video images from m older camcorder Previous Work

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▶Arc intensit ity sensor good for fast arc intensit ity transie ient Q : What else can be done ? ▶ Use consume mer-grade video camera, not profes fessional l high-speed camera Q : Any consume mer-grade camera good for arc video image ? Previous Work

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▶ High-speed cameras are good but not economi micall lly feasib ible le ▶ Acti tion cameras are inexpensiv ive and can be insta tall lled on loco/c /car roof. Q : Are consume mer-grade acti tion camera good for arc video image ? Arc Image

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Arc Image

Small arc with blue color r in its s periphery ry

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Arc Image

Small arc with yellow to red color r in its s periphery ry

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Arc Image

Arcs s on both contact ct stri ripes s simultaneousl sly y (I)

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Arc Image

Arcs s on both contact ct stri ripes s simultaneousl sly y (II)

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Arc Image

Arcs s on both contact ct stri ripes s simultaneousl sly y (III)

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Arc Image

Arc intensi sity y differs rs in various s direct ctions s (I)

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Arc Image

Arc intensi sity y differs rs in various s direct ctions s (II)

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▶ Acti tion cameras can produce high- qualit ity arc images at high frame me rate ▶ Arc shapes and intensit ity are not uniform m in diff fferent t directi tions ▶ Acti tion cameras capture very small ll arcs, , raisin ing the questi tion of crit iteria ia for “measurable arcs” in EN50119 Arc Image

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Arc Intensity Sensing ▶ Two field ld tests ts were conducte ted in 2014 in Taiwan’s East Mainline ▶ Two arc sensors insta tall lled on both sides of locomo moti tive roof f under the pantograph in the 1st

st

fie ield ld test ▶ Arc sensors insta tall lled in front t and rear

  • f the pantograph in the 2nd

nd field

ld test

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Arc Intensity Sensing

1st

st field

ld test t arc c senso sor deploym loyment 2nd

nd field

ld test t arc senso sor deploym loyment

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Arc Intensity Sensing Arc intensit ity sensor outputs ts in 1st

st field

ld test t :

  • n both sides of loco roof under pantograph
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Arc Intensity Sensing Arc intensit ity sensor outputs ts in 2nd

nd field

ld test t :

  • n loco roof under pantograph/

/ front t & rear

mV

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Arc Intensity Sensing Arc intensit ity sensor outputs ts in 2nd

nd field

ld test t :

  • n loco roof under pantograph/

/ front t & rear

V

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Arc Intensity Sensing Arc intensit ity sensor outputs ts in 2nd

nd field

ld test t :

  • n loco roof under pantograph/

/ front t & rear

V

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Arc Intensity Sensing Arc intensit ity sensor outputs ts in 2nd

nd field

ld test t :

  • n loco roof under pantograph/

/ front t & rear

V

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Arc Intensity Sensing Arc intensit ity sensor outputs ts in 2nd

nd field

ld test t :

  • n loco roof under pantograph/

/ front t & rear

V

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Arc Intensity Sensing Arc intensit ity sensor outputs ts in 2nd

nd field

ld test t :

  • n loco roof under pantograph/

/ front t & rear

V

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Conclus lusion ion ▶ Consume mer-grade actio ion cameras can be an inexpensiv ive alternati tive for high-speed camera to capture high- resolutio lution arc images at high rates tes ▶ Arc images and intensit ity sensor out- puts confi firm m that arcs do not proje ject light t uniformly mly in all directi tions

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Conclus lusion ion ▶ Need for more precis ise crit iteria ia for “measurable arcs” in international standards such as EN50119 in terms ms

  • f arc image siz

ize and/or intensit ity ▶ Sensor deployme ment t should also be inclu luded in Internati tional l standards updates or revis isions

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Conclus lusion ion

Camera ras s and arc sensor r deployme yment examp mple

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Thank ank you

  • u

Ques esti tions?

  • ns?