Ultrasonic Generator Waveguide Structure to Reduce External Leakage
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Solution Overview
Problem
Existing ultrasonic generators face issues with ultrasonic wave leakage to the outside when the waveguide comes into contact with external objects.
Innovation Solution
The ultrasonic generator includes a configuration with a converging portion and a waveguide that uses reflecting surfaces to introduce ultrasonic waves as plane waves, and incorporates a jutting out portion or cover to minimize contact with external objects, reducing wave leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the waveguide outer circumferential surface comes into contact with external objects, then the ultrasonic wave leaks to the external object, but if the waveguide is isolated from external objects, then the device complexity increases
Solution Approach 1:
The waveguide is segmented into multiple sections: a first shaft portion, a second shaft portion, and a jutting out portion. This segmentation allows the waveguide to limit contact with external objects to specific regions while maintaining structural integrity and reducing ultrasonic wave leakage without requiring complete isolation.
Solution Approach 2:
The jutting out portion extends in a direction orthogonal to the ultrasonic wave propagation direction, creating a three-dimensional structure that limits contact with external objects. This dimensional approach allows the waveguide to reduce leakage while maintaining a relatively simple overall structure.
2Power
If the ultrasonic wave is converged strongly, then the energy concentration increases, but the wave attenuation increases
Solution Approach 1:
The jutting out portion acts as an intermediary structure between the first and second shaft portions. It helps to guide and maintain the ultrasonic wave as a plane wave while limiting contact with external objects, thereby reducing energy loss from leakage while preserving the converged energy state.
Solution Approach 2:
Different portions of the waveguide have different structural characteristics optimized for their specific functions: the first shaft portion for wave introduction, the jutting out portion for limiting external contact, and the second shaft portion for wave transmission. This local optimization allows strong convergence while minimizing attenuation.
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 configuration effectively reduces ultrasonic wave leakage by limiting contact with external objects, maintaining wave integrity and minimizing energy loss.
Implementation Method 1
The first reflecting surface reflects the ultrasonic wave generated at the ultrasonic wave generation source
Implementation Method 2
The second reflecting surface reflects the ultrasonic wave reflected by the first reflecting surface
Implementation Method 3
an ultrasonic wave converged while being less attenuated is propagated to a waveguide constituted by the shaft member
Data Source
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AI summary
A leakage of an ultrasonic wave propagating through a waveguide to the outside is reduced. An ultrasonic generator (10) includes an ultrasonic wave generation source (11), an ultrasonic wave converging portion (12), and a waveguide (13). The waveguide (13) includes a first shaft portion (21), a second shaft portion (22), and a jutting out portion (30). The first shaft portion (21) extends from the ultrasonic wave converging portion (12) to one side in a predetermined direction. The second shaft portion (22) is disposed on the one side in the predetermined direction relative to the first shaft portion (21) and extends in the predetermined direction. The jutting out portion (30) is provided between the first shaft portion (21) and the second shaft portion (22) in the predetermined direction. The jutting out portion (30) juts out more outward than the outer circumferential surfaces of the first shaft portion (21) and the second shaft portion (22) in a plane direction orthogonal to the predetermined direction.