[Testing Research of Transient Temperature Distribution for the Barrel Surface by Speckle Pattern Interferometry]

Area of Science:

• Optical Metrology
• Thermal Analysis
• Surface Deformation Measurement

Context:

• Traditional transient temperature test equipment suffers from high thermal inertia and single-point detection limitations.
• Accurate real-time monitoring of transient temperature distribution on surfaces, such as gun barrels, is crucial for performance and safety.

Purpose:

• To design and validate a novel test system for real-time monitoring of transient temperature distribution.
• To utilize Speckle Pattern Interferometry (SPI) and spectroscopy for non-contact temperature measurement.
• To compare the accuracy and robustness of Image Recognition-Speckle Pattern Interferometry (IR-SPI) and Fourier Transform-Speckle Pattern Interferometry (FT-SPI).

Summary:

• A transient temperature distribution test system was developed using SPI and spectroscopy, converting surface deformation due to temperature changes into speckle interference fringes.
• The spectral distribution function, obtained via Fourier transform of the fringes, allows for temperature data inversion at any sampling time.
• Experiments demonstrated that both IR-SPI and FT-SPI can detect transient temperatures, with FT-SPI showing superior accuracy and resilience to surface imperfections.

Impact:

• The developed FT-SPI method provides a more accurate and reliable approach for transient temperature distribution measurement compared to traditional methods.
• This technology can overcome challenges posed by surface defects, paint wear, and other surface anomalies, enhancing measurement integrity.
• Enables real-time, non-contact monitoring of dynamic temperature changes on various surfaces, with potential applications in defense, manufacturing, and material science.