Thermal-wave radar imaging for non-destructive weld inspection
Thermal-Wave Radar Imaging (TWRI) offers rapid, non-destructive inspection of welds in TPO membranes, detecting both surface and subsurface defects with high sensitivity. This advanced thermography technique enhances quality assurance and installation standards in real time.
Overview
Thermal-Wave Radar Imaging (TWRI) is a cutting-edge active infrared thermography technique designed for the non-destructive inspection of welds, particularly in thermoplastic polyolefin (TPO) membranes. This innovative method allows for the rapid detection of both surface and subsurface defects, such as bubbles, wrinkles, voids, and misalignments, enhancing the quality assurance process. By generating modulated thermal waves, TWRI provides high-contrast imaging that differentiates between defective and intact weld areas, ensuring consistent installation standards.
Technical specifications
TWRI utilizes modulated laser-induced thermal excitation combined with advanced signal processing to achieve superior depth resolution and defect contrast compared to conventional methods. Key features include:
- Detection capabilities: Identifies defects up to 4 mm deep, including subsurface issues not visible through traditional visual methods.
- Real-time imaging: Offers immediate feedback on weld integrity for efficient quality control.
- Three-dimensional imaging: Uses thermal-wave coherence analysis to reconstruct detailed images of subsurface defects.
- Field applicability: Designed for non-contact inspection, suitable for varied environmental conditions.
Technology readiness level
Currently at TRL 4, TWRI has been validated in laboratory settings for detecting subsurface defects in TPO membranes and automotive parts. The ongoing research includes optimizing parameters, refining algorithms, and developing a prototype for field deployment. Future phases will involve collaboration with industry partners to enhance usability and performance through machine learning and real-world testing.
About University of Toronto
The University of Toronto is a comprehensive public research university with three campuses in the Toronto region and a globally scaled research enterprise. Its downtown footprint is embedded within a major academic health network and an adjacent innovation district, enabling co-located labs, clinical trials, and rapid testing with end users. Companies connect through co-op and long-duration internships, sponsored research, and access to shared core facilities and prototyping resources. Research is supported by Canada’s Tri‑Agency (NSERC, CIHR, SSHRC) and the Canada Foundation for Innovation, alongside provincial programs and industry partnerships. A dedicated technology transfer office provides IP management, licensing, and startup support through a coordinated entrepreneurship network.
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