Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Method and System for Determining Material Property of Sample using Edge Wavefront Signal
Categories for this Invention
Technology: Determining material property using edge wave front signal
Category: Advance Material & Manufacturing
Industry: Material Science
Application: Non-destructive Testing (NDT), Acoustic microscopy, Material characterization,
2D-FFT.
Market: The global market size of valued at USD 14.28 billion in 2022 and is projected to grow from USD 15.78 billion in 2023 to USD 33.73 billion by 2030, exhibiting a CAGR of 11.5% during the forecast period.
Problem Statement
- Acoustic microscopy is a method used for material characterization of metallic and biological samples by generating surface waves using a single transducer in pulse echo mode.
- The energy leaks back into the coupling fluid, and the surface wave velocity is determined by analyzing interference.
- Ultrasonic waves can be focused using a lens or a 30 lens-less approach using a flexible piezo polymer element like Polyvinylidene Fluoride (PVDF).
- Edge waves can degrade image quality in high-frequency imaging applications.
- Matching the transducer’s aperture angle with the material’s critical angles is necessary.
- There is a need for an improved system and method for improving material imaging and characterization, especially in situations where conventional ultrasound methods are limited.
Technology
Key Features / Value Proposition
Techniques
- an acoustic wavefront signal that includes an acoustic wavefront signal and
- receive a plurality of reflected acoustic wave signals from the sample for each of the adjusted defocus distance and
- generate information for each of the defocus distance based on the plurality of received reflect acoustic wave signals.
- Sequentially, the control unit is configured to analyze the information for each of the defocus distance to determine the material property of the sample.
Control unit
- To control incident angle of the acoustic wavefront signal of the curved ultrasonic transducer
- based on the element diameter and focal length of the transducer.
- generate surface velocity of the sample based the generated plurality of curves
Remote pulse unit
- It is operatively coupled to the pulse generator/receiver and configured to amplify the electrical signal sent to the curved ultrasonic transducer for excitation
A non-transitory computer-readable medium
- It stores instructions
- It involves mounting a curved ultrasonic transducer on a sample’s top surface, providing an electrical signal for excitation,
- generating an acoustic wavefront signal, guiding it towards the sample, adjusting defocus distance, receiving reflected signals,
- generating information for each defocus distance, and analyzing the information to determine the sample’s material properties.
- comparing wave property of modes in the curve with a predefined wave property of modes present in the database of the system
Performance
- Includes mounting a curved ultrasonic transducer over a top surface of the sample such that the curved ultrasonic transducer is adjustable in 3 dimensions.
- This method ensures accurate and reliable results.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Krishnan Balasubramanian
Department of Mechanical Engineering
Intellectual Property
IITM IDF Ref. 2420
Patent No: IN 540337
PCT /IN2023/050886
Technology Readiness Level
TRL-4
Experimentally validated in Lab;