Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Distortion Correction of Surface Temperature Measurement Using an Infrared Camera

적외선 카메라를 이용한 표면온도측정의 왜곡 보정

  • Received : 2016.03.05
  • Accepted : 2016.06.29
  • Published : 2016.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

Surface temperature of supersonic wind tunnel model was measured using an infrared thermography technique. To measure the temperature quantitatively, various calibration techniques such as blackbody calibration which converts detected camera signal to temperature, distortion correction due to the camera lens and an imbalance of camera pose, and emissivity calibration which considers viewing angles to the model surface, were employed. Throughout the study, for the quantitative as well as qualitative surface temperature measurement, it was verified that the distortion correction must be considered even for the use of two-dimensional model in aerodynamics testing.

적외선 열화상 방식을 사용하여 초음속 풍동모델 표면온도를 측정하였다. 표면온도를 정량적으로 파악하기 위해 적외선 카메라 감지신호의 흑체 보정, 카메라와 렌즈의 불완전한 평형 등으로 야기되는 왜곡 보정, 그리고 모델표면 시야각에 따른 방사율 보정을 수행하였다. 본 연구를 통해 적외선 카메라를 이용한 표면온도측정의 왜곡보정 기술을 확보하였으며, 공력특성 실험을 통해 통상적으로 사용되는 이차원 시험모델 사용시 정성적일 뿐만 아니라 정량적인 계측을 위해서는 왜곡보정이 고려되어야 함을 입증하였다.

Keywords

References

  1. Sant, Y. L., Marchand, M., Millan, P., and Fontaine, J., "An Overview of Infrared Thermography Techniques Used in Large Wind Tunnels," Aerospace Science and Technology, Vol. 6, 2002, pp. 355-366. https://doi.org/10.1016/S1270-9638(02)01172-0
  2. Cardone, G., Ianiro, A., Ioio, G. D., and Passaro, A., "Temperature Maps Measurements on 3D Surfaces with Infrared Thermography," Experiments in Fluids, Vol. 52, 2012, pp. 375-385. https://doi.org/10.1007/s00348-011-1225-9
  3. Henkels, A., and Maurer, F., "Application of Infra-Red Thermography in a Hypersonic Blowdown Wind Tunnel," Institute of Electrical and Electronics Engineers, 1989, CH276-3, pp. 516-524.
  4. Schrijer, F. F. J., "Experimental Investigation of Re-Entry Aerodynamic Phenomena," Ph.D Thesis, Delft University of Technology, 2010.
  5. Heikkila, J., "Geometric Camera Calibration Using Circular Control Points," Institute of Electrical and Electronics Engineers, Vol. 22, No. 10, 2000.
  6. Ochs, M., Horbach, T., Schulz, A., Koch, R., and Bauer, H. J., "A Novel Calibration Method for an Infrared Thermography System Applied to Heat Transfer Experiments," Measurement Science and Technology, Vol. 20, 2009, 075103 https://doi.org/10.1088/0957-0233/20/7/075103
  7. Zhang, Z., "A Flexible New Technique for Camera Calibration," IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 22, No. 11, 2000, pp. 1330-1334. https://doi.org/10.1109/34.888718
  8. Schmidt, E., and Eckert, E., "Uber die Richtungsverteilung der Warmestrahlung von Oberflachen," Forschung im Ingenieurwesen Vol. 6, No. 4, 1935, pp. 175-183. https://doi.org/10.1007/BF02578830