Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras

Flexible Ribbed Bar Waveguide Array Transducer Add-on For Ultrasonic Guided Wave Generation

Categories for this Invention

Category: Non-Destructive Testing Methods and Equipment (NDT/NDE)

Industry: Materials Testing, Lab Testing Automotive, Structural Health Monitoring (SHM), Biomedical Application, Environmental Use

Application: NDT Equipment & Service, Pipeline Inspection, Biomedical Imaging Devices, Civil & Health Structural Monitoring Solutions

Market: The global waveguide market was valued at $1.30 Bn in 2021, expected to reach $2.14 Bn by 2030 at 5.8% CAGR in 2022 to 2030.

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Problem Statement

  • Traditional ultrasonic transducers lack the ability to selectively enhance specific guided wave modes, hindering accurate testing.
  • Methods like angle beam techniques and comb transducers are widely used but they are bulky, imprecise and inflexible, limiting adaptability to various test specimen shapes, impacting reliability of non-destructive testing processes.
  • Achieving precise control over guided wave modes is crucial for effective inspection.
  • Hence, the present patent invention is needed to address the limitations and challenges posed by existing methods in ultrasonic testing applications.

Technology

  • The present patent invention primarily discloses a Flexible Ribbed Bar Waveguide Array Transducer. The technology overcomes traditional ultrasonic transducers drawbacks by offering a flexible & precise system to selectively generate guided wave modes in ultrasonic testing.

Invention Disclosure:

The key components of this technology include:

  • The technology includes a flexible central waveguide bar that transfers signals from an excitation element to the test object, adapting to different shapes and sizes of specimens.
  • Multiple secondary films are attached at set widths and intervals on both sides of the central waveguide bar.
  • These films are essential for selectively boosting specific guided wave modes in the test object.
  • An excitation element, like a piezoelectric transducer, is used to activate the central waveguide bar. This triggers the creation of guided wave modes that are transmitted to test object through attached secondary films.
  • The central waveguide bar’s material is selected for a different velocity than the test object. This velocity difference, coupled with correction factors, corrects time delays & optimizes guided wave mode efficiency.

Method of Non-Destructive Testing:

  • The technology involves a non-destructive testing method:
  • Excite the central waveguide bar, contact the test object, and receive signals from the test object for further analysis.

Key Features / Value Proposition

User perspective:

  • Offers precise control over guided wave modes, enhancing the accuracy of non-destructive testing.
  • Adapts to various shapes and sizes of test specimens, providing versatility in testing.
  • Streamlines testing processes, making it user-friendly & efficient.

Industrial perspective:

  • Improves NDT efficiency & reliability, providing a cost-effective solution compared to bulky & complex alternatives.
  • Applicable in diverse industries such as civil engineering, pipeline inspection, and biomedical applications.

Technology perspective:

  • Allows targeted testing by enhancing specific guided wave modes.
  • Utilizes materials with different velocities for waveguide and test object, optimizing wave mode efficiency.
  • Simplifies technology with single excitation element, reducing complexity and cost.

Questions about this Technology?

Contact For Licensing

sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in

Research Lab

Prof. Prabhu Rajagopal

Department of Mechanical  Engineering 

Intellectual Property

  • IITM IDF No.: 1441

  •  IP No.: 394271 (Granted)

Technology Readiness Level

TRL-4

Validated in Laboratory

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