Optical Fiber Pyrometer Designs for Temperature Measurements Depending on Object Size.

Area of Science:

• Optical Physics
• Metrology
• Thermal Engineering

Background:

• Accurate temperature measurement of hot objects is crucial in many industrial and scientific applications.
• Optical fiber pyrometry offers a non-contact method for high-temperature measurements.
• Existing models may have limitations in accuracy concerning object size and measurement distance.

Purpose of the Study:

• To develop and present a generalized model for temperature measurements using optical fiber pyrometers.
• To analyze the impact of hot object size and measurement distance on temperature measurement accuracy.
• To propose solutions for minimizing errors in optical fiber pyrometry.

Main Methods:

• Development of closed-form equations for radiated power coupled to optical fibers.
• Introduction of new generalized integration limits for pyrometer modeling.
• Analysis of error estimation based on target size and distance.
• Discussion of two-color fiber pyrometers as a generalized approach.

Main Results:

• Accurate predictions of critical distances to avoid errors in optical fiber end location.
• Models for estimating temperature measurement errors based on object size and distance.
• Demonstration of the influence of fiber types and object sizes on measurement accuracy.
• Validation of the proposed modeling approach for practical applications.

Conclusions:

• The developed model enhances the accuracy of optical fiber pyrometry for diverse applications.
• Understanding critical distances and error factors is essential for robust pyrometer design.
• Two-color fiber pyrometry presents a promising avenue for generalized high-temperature measurements.