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Thermometric camera calibration for temperature visualization

Brinck, Hanna LU and Davidsson, Hampus (2025) In CODEN:LUTEDX/TEIE EIEM01 20241
Industrial Electrical Engineering and Automation
Abstract
Thermal cameras play a crucial role in various applications, such as monitoring industrial location, medical purposes and security surveillance. However, the
existing thermometric calibration method for temperature determination requires
a complex and time consuming process. In this project, a new thermometric calibration method was looked into that utilized a heated shutter with the goal of
determining temperature of a black body element with an accuracy of plus minus 5
degrees Celsius. A flexible printed circuit board (PCB) was designed and attached
to the shutter used in the camera and the temperature was controlled by a PI
controller. By utilizing the heated shutter, calibration images were taken with a
known temperature.... (More)
Thermal cameras play a crucial role in various applications, such as monitoring industrial location, medical purposes and security surveillance. However, the
existing thermometric calibration method for temperature determination requires
a complex and time consuming process. In this project, a new thermometric calibration method was looked into that utilized a heated shutter with the goal of
determining temperature of a black body element with an accuracy of plus minus 5
degrees Celsius. A flexible printed circuit board (PCB) was designed and attached
to the shutter used in the camera and the temperature was controlled by a PI
controller. By utilizing the heated shutter, calibration images were taken with a
known temperature. All the calibration points were then fitted into a linear regression model showing the relation between pixel values and radiance, which was used to estimate the temperature of objects in the scene. Five different tests utilizing both the heated shutter and a black body element for reference temperatures was performed. It was discovered that by re-calibrating the camera when the sensor temperature increased or decreased, a temperature determination of plus minus 5 degrees Celsius could be established. Further improving the homogeneousness of the shutter and fine tuning the calibration process could prove that the solution is viable as an application for thermal cameras. (Less)
Please use this url to cite or link to this publication:
author
Brinck, Hanna LU and Davidsson, Hampus
supervisor
organization
course
EIEM01 20241
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Calibration, Thermal camera, Radiance, Flexible PCB, Heating PCB, PI controller
publication/series
CODEN:LUTEDX/TEIE
report number
5524
language
English
id
9184072
date added to LUP
2025-02-05 16:41:36
date last changed
2025-02-05 16:41:36
@misc{9184072,
  abstract     = {{Thermal cameras play a crucial role in various applications, such as monitoring industrial location, medical purposes and security surveillance. However, the
 existing thermometric calibration method for temperature determination requires
 a complex and time consuming process. In this project, a new thermometric calibration method was looked into that utilized a heated shutter with the goal of
 determining temperature of a black body element with an accuracy of plus minus 5
 degrees Celsius. A flexible printed circuit board (PCB) was designed and attached
 to the shutter used in the camera and the temperature was controlled by a PI
 controller. By utilizing the heated shutter, calibration images were taken with a
 known temperature. All the calibration points were then fitted into a linear regression model showing the relation between pixel values and radiance, which was used to estimate the temperature of objects in the scene. Five different tests utilizing both the heated shutter and a black body element for reference temperatures was performed. It was discovered that by re-calibrating the camera when the sensor temperature increased or decreased, a temperature determination of plus minus 5 degrees Celsius could be established. Further improving the homogeneousness of the shutter and fine tuning the calibration process could prove that the solution is viable as an application for thermal cameras.}},
  author       = {{Brinck, Hanna and Davidsson, Hampus}},
  language     = {{eng}},
  note         = {{Student Paper}},
  series       = {{CODEN:LUTEDX/TEIE}},
  title        = {{Thermometric camera calibration for temperature visualization}},
  year         = {{2025}},
}