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Creep Monitoring of Submersible Observation Windows Using Mueller Matrix Imaging
Haibo Tu1,2, Xingying Bu2, Ran Liao2
1Department of Physics, Yangtze University, Jingzhou 434100, China.
Materials (Basel, Switzerland)
|July 14, 2023
Summary
This study introduces a novel method for monitoring submersible observation window creep using a dual-DoFP polarization camera. The technique effectively quantifies deformation under pressure, enhancing safety assessments.
Area of Science:
- Optical Engineering
- Materials Science
- Mechanical Engineering
Background:
- Manned submersible observation windows face safety risks due to extrusion and creep deformation under underwater static pressure.
- Current deformation assessment methods lack real-time, non-contact capabilities, hindering timely safety evaluations.
- Accurate monitoring of window deformation is crucial for ensuring submersible operational safety and optical performance.
Purpose of the Study:
- To develop and validate a real-time, non-contact method for monitoring creep deformation in submersible observation windows.
- To assess the effectiveness of polarization-based techniques in characterizing window material behavior under pressure.
- To establish a foundation for advanced safety monitoring systems for deep-sea exploration vehicles.
Main Methods:
- A conceptual setup utilizing waveplate rotation and a dual-division of focal-plane (DoFP) polarization camera was designed.
- Mueller matrix images of observation window samples were acquired under varying pressures and durations.
- Characteristic parameters (t1, R, r, R', ψ, A, D) were extracted using Mueller matrix transformation (MMT) and Mueller matrix polar decomposition (MMPD).
Main Results:
- The extracted parameters effectively described observation window creep at different pressure levels, validated by finite element analysis simulations.
- The study demonstrated the capability of polarization imaging to detect and quantify subtle material deformations.
- The developed method showed potential for real-time, non-contact creep monitoring.
Conclusions:
- The proposed polarization-based method offers a promising solution for real-time, non-contact creep monitoring of submersible observation windows.
- This technique can significantly contribute to enhancing the safety and reliability of manned submersibles.
- Further development could lead to integrated systems for continuous structural health monitoring in extreme environments.
