Ultraviolet Structured-Light-Induced Phosphorescence for Simultaneous 3D Shape and Temperature Imagin

Résumé fourni par la source

To address the multidimensional sensing requirements of hypersonic vehicles and aero-engine hot-section components under extreme operating conditions, this paper proposes and implements a single-optical-path integrated system for simultaneous three-dimensional (3D) topography and temperature field measurement. The core innovation of this system is the utilization of the dual functionality of a 405 nm ultraviolet Digital Light Processing (DLP) light source—both as a structured light projection source for geometric reconstruction of complex thin-walled components via Gray-code and phase-shift encoding, and as an efficient excitation source to induce thermally sensitive luminescent signals from surface-applied Polymer-Derived Ceramic (PDC) phosphor films. The study elaborates on the mathematical models governing spatial coordinate transformation and optical intensity signal decoupling, with system calibration conducted over the temperature range of 50°C–600°C. Experimental results demonstrate that the proposed approach effectively overcomes the challenge of correlating topographic and thermal measurements, thereby providing a high-precision digital tool for failure analysis of complex thermal protection structures.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.