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Development and Investigation of an Automated Temperature Calibration for Temperature Phosphors

Xu, Xin LU (2012) In Lund Reports on Combustion Physics, LRCP-161 FYSM60 20121
Department of Physics
Combustion Physics
Abstract
This thesis achieves a semi-automatic temperature calibration for thermographic phosphors. Thermocouple temperature information and phosphorescence decay curves are recorded synchronized and continuously while the oven temperature is ramped across the entire temperature range. A LabVIEW interface was developed in this context and applied to calibrate two phosphors, CdWO4 and Mg4FGeO6:Mn. These two thermographic phosphors have different temperature sensitive ranges, 294 K to 573 K for CdWO4 phosphor, and 294 K to 973 K for Mg4FGeO6:Mn phosphor. The conventional and automatic calibrations of CdWO4 have been performed using the same experimental setup. Though in this thesis work only on automatic calibration of Mg4FGeO6:Mn has been done, the... (More)
This thesis achieves a semi-automatic temperature calibration for thermographic phosphors. Thermocouple temperature information and phosphorescence decay curves are recorded synchronized and continuously while the oven temperature is ramped across the entire temperature range. A LabVIEW interface was developed in this context and applied to calibrate two phosphors, CdWO4 and Mg4FGeO6:Mn. These two thermographic phosphors have different temperature sensitive ranges, 294 K to 573 K for CdWO4 phosphor, and 294 K to 973 K for Mg4FGeO6:Mn phosphor. The conventional and automatic calibrations of CdWO4 have been performed using the same experimental setup. Though in this thesis work only on automatic calibration of Mg4FGeO6:Mn has been done, the conventional calibration presented in the article[1] was done under similar experimental condition. The automated results were compared to conventional calibrations showed no major difference neither for CdWO4 nor Mg4FGeO6:Mn. Additionally, this thesis studies some factors which may affect the accuracy of CdWO4 phosphor automatic calibration result. These factors include the relation between the phosphor response speed and thermocouple response speed, long exposure time for phosphor in high temperature environment, and laser induced heating effects. None of these factors showed a significant impact upon the obtained results within the area of investigation. (Less)
Abstract (Swedish)
Utveckling och utredning av en automatiserad temperatur kalibrering temperatur fosfor.

I denna avhandling presenteras en halvautomatisk temperaturkalibrering för termografiska fosforer. Temperaturdata från termoelement, och fosforensens avklingningskurva registreras och synkroniseras med en temperatur som ökar kontinuerligt över ett bestämt temperaturintervall. Ett LabVIEW-gränssnitt har utvecklats för ändamålet och använts till kalibrering av de två fosforerna; CdWO4 och Mg4FGeO6:Mn. Dessa två termografiska fosforer har olika temperaturkänsliga intervall: 294 K till 573 K för CdWO4-fosforen, och 294 K till 973 K för Mg4FGeO6:Mn-fosforen. Konventionella och automatiska kalibreringar av CdWO4- har utförts med denna experimentella metod.... (More)
Utveckling och utredning av en automatiserad temperatur kalibrering temperatur fosfor.

I denna avhandling presenteras en halvautomatisk temperaturkalibrering för termografiska fosforer. Temperaturdata från termoelement, och fosforensens avklingningskurva registreras och synkroniseras med en temperatur som ökar kontinuerligt över ett bestämt temperaturintervall. Ett LabVIEW-gränssnitt har utvecklats för ändamålet och använts till kalibrering av de två fosforerna; CdWO4 och Mg4FGeO6:Mn. Dessa två termografiska fosforer har olika temperaturkänsliga intervall: 294 K till 573 K för CdWO4-fosforen, och 294 K till 973 K för Mg4FGeO6:Mn-fosforen. Konventionella och automatiska kalibreringar av CdWO4- har utförts med denna experimentella metod. För Mg4FGeO6:Mn har endast en automatisk kalibrering gjorts, dock har den konventionella kalibreringen i artikel [1] utförts under liknande betingelser. En jämförelse av de automatiska kalibreringarnas resultat mot de konventionella kalibreringarna visar inte på några större avvikelser, verken för CdWO4 eller Mg4FGeO6:Mn. Denna avhandling studerar även faktorer som kan påverkar noggrannheten i automatiska kalibreringar av CdWO4. Till dessa faktorer kan nämnas; förhållandet mellan fosforernas- och termoelementets responstid, långa exponeringtider för fosforerna i en hög temperatur och laserinducerade uppvärmningseffekter. Inga av dessa effekter visade sig, inom det undersöka området, ha någon signifikant påverkan på resultaten. (Less)
Please use this url to cite or link to this publication:
author
Xu, Xin LU
supervisor
organization
course
FYSM60 20121
year
type
H2 - Master's Degree (Two Years)
subject
publication/series
Lund Reports on Combustion Physics, LRCP-161
report number
ISRN LUTFD2/TFC-161-SE
ISSN
1102-8718
language
English
id
3053644
date added to LUP
2012-09-26 16:14:47
date last changed
2012-11-12 21:03:41
@misc{3053644,
  abstract     = {This thesis achieves a semi-automatic temperature calibration for thermographic phosphors. Thermocouple temperature information and phosphorescence decay curves are recorded synchronized and continuously while the oven temperature is ramped across the entire temperature range. A LabVIEW interface was developed in this context and applied to calibrate two phosphors, CdWO4 and Mg4FGeO6:Mn. These two thermographic phosphors have different temperature sensitive ranges, 294 K to 573 K for CdWO4 phosphor, and 294 K to 973 K for Mg4FGeO6:Mn phosphor. The conventional and automatic calibrations of CdWO4 have been performed using the same experimental setup. Though in this thesis work only on automatic calibration of Mg4FGeO6:Mn has been done, the conventional calibration presented in the article[1] was done under similar experimental condition. The automated results were compared to conventional calibrations showed no major difference neither for CdWO4 nor Mg4FGeO6:Mn. Additionally, this thesis studies some factors which may affect the accuracy of CdWO4 phosphor automatic calibration result. These factors include the relation between the phosphor response speed and thermocouple response speed, long exposure time for phosphor in high temperature environment, and laser induced heating effects. None of these factors showed a significant impact upon the obtained results within the area of investigation.},
  author       = {Xu, Xin},
  issn         = {1102-8718},
  language     = {eng},
  note         = {Student Paper},
  series       = {Lund Reports on Combustion Physics, LRCP-161},
  title        = {Development and Investigation of an Automated Temperature Calibration for Temperature Phosphors},
  year         = {2012},
}