Magnetostrictive Phased Array Transducer Without Waveguide
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Solution Overview
Problem
Conventional magnetostrictive transducers face challenges in generating directional ultrasonic waves efficiently due to the use of separate waveguides, which reduce efficiency and require a large area for the magnetostrictive patch, making it difficult to mount and use effectively.
Innovation Solution
A magnetostrictive phased array transducer is designed with multiple plate-shaped ferromagnetic members adhered to a surface, featuring a meander coil and static magnetic field to generate shear horizontal bulkwaves without a separate waveguide structure, allowing for efficient generation and focusing of ultrasonic waves using the magnetostriction effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a separate waveguide or waveguide structure is used in conventional magnetostrictive transducers, then directional ultrasonic waves can be generated, but the efficiency is reduced and the required area increases
Solution Approach 1:
The invention extracts and eliminates the separate waveguide structure from the transducer system. By directly coupling the magnetostrictive patch to the test object surface, the waveguide component is removed entirely, reducing the overall area requirement and improving transduction efficiency through direct energy transfer without intermediate structural losses
Solution Approach 2:
The invention merges the magnetostrictive patch directly with the test object surface by adhering it closely to the mounting place. This integration eliminates the need for separate waveguide structures and reduces the total area required, as the magnetostrictive patch itself serves as both the transducer and the coupling medium
2Ease of operation
If a separate waveguide structure is used, then ultrasonic waves can be directed, but the device complexity and mounting difficulty increase
Solution Approach 1:
The separate waveguide structure is extracted and removed from the system. The magnetostrictive patch is applied directly to the test object surface using adhesive, eliminating complex waveguide assembly requirements and simplifying both the device structure and mounting procedure
Solution Approach 2:
The invention changes the operational parameters by eliminating the need for precise waveguide alignment and coupling. The direct adhesion method allows for more tolerant positioning and simplifies the mounting process, transforming a complex mechanical assembly into a simple adhesive bonding operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables efficient generation and focusing of shear horizontal bulkwaves, reducing the required area and improving efficiency by eliminating the need for a separate waveguide, allowing for precise ultrasonic wave manipulation and defect detection in measurement samples.
Implementation Method 1
a plurality of magnetostrictive members generate a plurality of shear horizontal bulkwaves while being deformed by the magnetostriction effect
Implementation Method 2
a meander coil having a plurality of coil lines extended in the direction parallel with the bottom surface on each insulator, wherein adjacent coil lines are connected so that current flows in the opposite directions to each other, thereby generating a dynamic magnetic field with respect to each magnetostrictive member
Data Source
AI summary
A magnetostrictive phased array transducer for transducing shear horizontal bulkwaves including a plurality of magnetostrictive members each having a bottom surface of a plate-shaped structure made of a ferromagnetic material, which is mounted to be adhered closely to the surface of a mounting place; an insulator disposed on a side surface of each magnetostrictive member; a meander coil having a plurality of coil lines extended in the direction parallel with the bottom surface on each insulator, wherein adjacent coil lines are connected so that current flows in the opposite directions to each other, thereby generating a dynamic magnetic field with respect to each magneto strictive member; and a magnet mounted to generate a static magnetic field perpendicular to the dynamic magnetic field. When the current is supplied to the meander coil, a plurality of magnetostrictive members generate a plurality of shear horizontal bulkwaves while being deformed by the magnetostriction effect.