Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Technology Category/Market
Category- Non-destructive evaluation (NDE), Structural Health Monitoring
Applications – Ultrasonic wave inspection/ monitoring methods, long-term corrosion monitoring and suitable for leave-in-place sensor applications in a Structural Health Monitoring mode.
Market – Magnetostrictive Material Market size is forecast to reach $25.2 billion by 2025, after growing at a CAGR of 8.6% during 2020-2025.
Targeted Industries
Watermarking IP design,
Electronic circuits
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Problem Statement
- In magnetostrictive patch transduction, the patch dimension in the direction of wave propagation influences its frequency response.
- Generally, the patch-width must be equal to half the wavelength of the wave produced.
- However, in conventional magnetostrictive patch transducers, the selection of patch width effects the sensor’s frequency response, the excitation of guided waves occurs in a narrow bandwidth.
- Despite certain advantages such as better sensitivity and signal to noise ratio, the scope of applications where a narrowband magnetostrictive patch transducer can be used is limited due to limited frequency response.
- There is therefore a need for magnetostrictive patch (MP) transducers that overcome the limitations and provide a broadband frequency response.
Technology
- The proposed Staircase Magnetostrictive Patch(ScaMP), constructed like a staircase, contributes to the transducer’s wide-banded frequency response.
- The width and length of each step are to be selected in such a way that it will all have the same area exposed to the magnetic field.
- The number of steps and widths can be chosen based on the required frequency coverage.
- The ScaMP has a staircase-like structure/shape comprising a plurality of steps 202a-202n, each step having a corresponding patch-width Ws1-Wsn as shown in Fig 1.
- Additionally, ScaMP can excite inside the designated frequency band in relation to the excitation frequency bandwidth if the corresponding step width was taken into account during design.
- The user can employ the frequency-sweep strategy as necessary because ScaMP on the other hand will be able to excite individual narrowband frequencies in accordance with the steps included.
Key Features/Value Proposition
1.The method effectively identify dimensions and orientation of a work pieces in the workspace from the 3D model using photogrammetry.
2.This method detects weld trajectory on a dimensions and orientation of the work pieces by considering intensity differences of each work pieces using a self-learning algorithm.
3.This method transforms the identified weld trajectory into machine instructions to perform welding in a physical space.
4.The size of the work piece and the weld seam is not limited by the workspace.
5.This method can be used for welding large structures that are bigger than the workspace.
6.This system is designed to use fusion arc welding processes such as gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), etc.
Questions about this Technology?
Contact for Licensing
Research lab
Prof. Krishnan Balasubramanian,
Department of Mechanical Engineering
Intellectual Property
- IITM IDF Ref. 2455
- IN 202241070456
Technology Readiness Level
TRL – 4
Experimentally validated in lab.