Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Tvådimensionell avbildning av temperaturen hos en solid yta: Tvåfärgs pyrometer med en CCD-kamera
2014 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

Two dimensional two-color pyrometer was developed with a 3 CCD for imaging high solid surface temperatures in the research at Luleå University of Technology (LTU). The initial calibrations has been performed with a blackbody radiation source for a temperature range from 900 K up to 1700 K. The camera has been calibrated for how the gain and exposure time affect the pixel intensity (DN). The gain was shown to have an exponential correlation to the pixel intensity. For the exposure time there was a linear correlation towards the pixel intensity where slope and intercept were functions of the energy. The ratio of the green and red pixel intensity for an image is translated into the corresponding temperature. Based on calibration results, algorithm was created to convert the ratio of the two colors to temperature by a polynomial function for gain and exposure time input. This decreased the program computing time compared to if the temperature had to be calculated iteratively from the equations for the both pixel intensities, for each pixel.The resulting calibration is valid for the temperature range from 1300 K up to 1700 K and is within the target area for the temperature range needed for the research at LTU. The validation of the calculated temperatures delivered a good results from 1100 K up to 1700 K. A pixel intensity in the range 150 < DN < 200 is suggested for the red channel for imaging. The calibration was done for 8 bit images which correspond to a range of pixel intensity from 0 to 255 for the colors red, green and blue (RGB). A validation experiment was done by imaging the surface of a thermocouple heated by a flat flame burner. The lowest offset between the measured temperature (thermocouple) and the calculated temperature (3CCD) was ca. 25 K and the highest ca. 100 K. The results showed that the evaluated technique of using a 3CCD camera as a two-color pyrometer is valid for measuring solid surface temperature. The calibration will make it possible to measure the surface temperature on fuel particles which will be done during the future research at LTU.

Ort, förlag, år, upplaga, sidor
2014. , s. 37
Nyckelord [en]
Technology, CCD, 3CCD, Pyrometer, Two-color, Solid surface, Temperature
Nyckelord [sv]
Teknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-46099Lokalt ID: 3bd165a0-0cd0-465a-af02-2ac8926776d0OAI: oai:DiVA.org:ltu-46099DiVA, id: diva2:1019411
Ämne / kurs
Examensarbete, minst 30 hp
Utbildningsprogram
Maskinteknik, master
Handledare
Examinatorer
Anmärkning
Validerat; 20140310 (global_studentproject_submitter)Tillgänglig från: 2016-10-04 Skapad: 2016-10-04Bibliografiskt granskad

Open Access i DiVA

fulltext(1345 kB)86 nedladdningar
Filinformation
Filnamn FULLTEXT02.pdfFilstorlek 1345 kBChecksumma SHA-512
60cef205b41d2d9b8e01d0916b22b23c443d4aa31c71be14b76ae8619bb6a543a29c517950e22b6d0fb640f4071dc0ccc48e7bdf2fefed6424a6220406354e0d
Typ fulltextMimetyp application/pdf

Sök vidare i DiVA

Av författaren/redaktören
Holmros, Daniel

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 86 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 112 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf