Digital Image Correlation for TPO Membrane Weld Analysis
A portable Digital Image Correlation (DIC) system for evaluating TPO membrane welds, assessing surface topography, and detecting weld defects in-field. This solution aims to enhance quality control and ensure the integrity of welds under real-world conditions.
Overview
Digital Image Correlation (DIC) offers a transformative approach for assessing the quality of Thermoplastic Polyolefin (TPO) membrane welds. By employing portable, pre-calibrated DIC systems, this technology enables in-field evaluation of weld seam surface topography and the identification of weld insufficiencies. This method is designed to improve quality control processes by providing precise, cost-effective measurement capabilities that ensure the integrity of welds under real-world conditions.
Technical specifications
- Surface Topography Measurement: DIC measures the topography of TPO weld seams by analyzing speckle patterns. These patterns can be either applied externally or embedded within the material itself.
- Defect Detection: The technology identifies the location and extent of weld insufficiencies through strain pattern analysis during tensile testing.
- Portable System: A pre-calibrated DIC system is optimized for use under field conditions, allowing for real-time analysis and decision-making.
- Proof-of-Concept Experiments: Initial experiments include evaluating acceptable versus inadequate weld seams, with further tests under controlled defects to develop pass/fail criteria.
Technology readiness level
Currently at TRL 3, this technology is in the proof-of-concept stage. Future validation includes statistical analysis of sample welds under laboratory and field conditions to refine metrics for topography and strain, ensuring comprehensive weld analysis.
About Oregon State University
Oregon State University is a comprehensive public research university and Oregon’s land‑grant institution, with a main campus in Corvallis and a statewide footprint. Industry partners tap a statewide Extension network and county offices to pilot and scale solutions with communities and companies across Oregon. A coastal marine science campus in Newport anchors ocean research and provides access to open‑ocean wave‑energy test ranges and grid‑connected infrastructure under development nearby, enabling sea‑to‑shore prototyping. Field stations and university‑managed research forests support long‑term trials and product validation in real‑world environments. A dedicated technology transfer office and the OSU Advantage programs—including the Advantage Accelerator—streamline IP, licensing, startup formation, and industry agreements.
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