Calibration and measurement performance analysis for a spectral band charge-coupled-device-based pyrometer

Area of Science:

• Optical Engineering
• Metrology
• Materials Science

Background:

• Commercial charge-coupled device (CCD) cameras are integral to industrial applications.
• Accurate non-contact temperature measurement is crucial for industrial process control.
• Existing pyrometry methods may face limitations in calibration accuracy and parameter sensitivity.

Purpose of the Study:

• To develop a spectral band CCD-based pyrometer for industrial temperature monitoring.
• To introduce an improved thermometry model for enhanced calibration accuracy.
• To analyze the impact of system parameters on pyrometer performance.

Main Methods:

• Utilized a commercial CCD camera to construct a spectral band pyrometer.
• Implemented a thermometry model based on extended effective wavelength for pyrometer description.
• Applied Tikhonov regularization to stabilize model parameters against calibration data perturbations.
• Investigated temperature measurement range, sensitivity, error, and uniformity using a blackbody furnace.

Main Results:

• The developed pyrometer operates within a temperature range of 800-1203 °C.
• Achieved a sensitivity of 0.4906-35.64 °C^-1.
• Demonstrated an average relative error of 2.5‰ and non-uniformity of 1.36%.

Conclusions:

• The spectral band CCD-based pyrometer offers accurate and reliable temperature measurements for industrial applications.
• The extended effective wavelength thermometry model and Tikhonov regularization effectively improve calibration and performance.
• System parameters like electron gain and F-number significantly influence pyrometer measurement capabilities.