Ultrasonic Vibration Transmitter Anti-Node Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The variability in resonance frequency due to changes in material properties or temperature causes shifts in the position of vibration anti-nodes, leading to reduced amplitude of vibration at cross-sectional increasing portions in ultrasonic treatment instruments, resulting in inconsistent vibration transmission.
Innovation Solution
A vibration transmitting unit with a specific design featuring an extending portion, a first component with a smaller cross-sectional area, a second component with a larger cross-sectional area, and a third component with an intermediate cross-sectional area, positioned to maintain the standard vibration anti-node at the third component, even when the resonance frequency varies, ensuring consistent amplitude transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the vibration transmitting unit is designed with cross-sectional increasing portions to amplify vibration amplitude, then the vibration amplitude increases, but the position of vibration anti-nodes shifts when resonance frequency varies, causing stress to act on the cross-sectional increasing portions and reducing vibration amplitude
Solution Approach 1:
The patent applies local quality by creating a specific structural configuration at the cross-sectional increasing portion with a predetermined curvature radius. This local geometric feature ensures that even when resonance frequency varies and anti-node positions shift, the stress concentration is controlled and the vibration amplitude transformation ratio remains consistent. The localized geometric design compensates for frequency variations without requiring global structural changes.
Solution Approach 2:
The patent utilizes parameter changes by carefully controlling the curvature radius of the cross-sectional increasing portion. By optimizing this geometric parameter, the structure maintains a consistent vibration amplitude transformation ratio across different resonance frequencies. The curvature radius is specifically designed to balance stress distribution and vibration amplification, making the system robust against frequency variations caused by material property changes or temperature fluctuations.
2Adaptability or versatility
If the resonance frequency varies due to material property changes or temperature, then the position of vibration anti-nodes shifts, but the cross-sectional increasing portion cannot maintain consistent amplitude transformation
Solution Approach 1:
The patent addresses frequency variability by designing a localized geometric feature (predetermined curvature radius) at the cross-sectional increasing portion. This local structural characteristic ensures that the amplitude transformation ratio remains consistent even when the overall resonance frequency changes. The localized design allows the structure to adapt to frequency variations without compromising manufacturing precision.
Solution Approach 2:
The patent applies beforehand cushioning by pre-designing the cross-sectional increasing portion with a specific curvature radius that anticipates and compensates for future resonance frequency variations. This preliminary geometric configuration acts as a buffer against frequency drift caused by material property changes or temperature fluctuations, maintaining consistent vibration transmission before actual frequency variations occur.
3Stress or pressure
If the vibration anti-node is positioned away from the cross-sectional increasing portion, then stress acts on the increasing portion, but the amplitude of vibration decreases
Solution Approach 1:
The patent resolves the stress-amplitude conflict by introducing a predetermined curvature radius at the cross-sectional increasing portion. This localized geometric feature serves dual purposes: it distributes stress to prevent concentration while simultaneously maintaining the structural configuration needed for vibration amplification. The curvature radius is optimized to balance stress management and amplitude enhancement, ensuring both stress resistance and vibration strength.
Solution Approach 2:
The patent applies curvature by designing the cross-sectional increasing portion with a predetermined curvature radius rather than a sharp or linear transition. This curved geometry smoothly distributes stress across the increasing portion, preventing stress concentration while maintaining the structural integrity needed for vibration amplification. The spherical/curved form factor inherently reduces stress concentration compared to angular transitions.
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 design reduces variability in the amplitude of vibration transmitted through cross-sectional increasing portions, maintaining consistent treatment efficacy even when resonance frequency changes, thereby stabilizing the treatment process.
Implementation Method 1
an extending portion (31), which extends along a longitudinal axis (C) and is capable of transmitting ultrasonic vibration from a proximal side (C1) to a distal side (C2)
Implementation Method 2
a standard vibration anti-node (A3), which is one of vibration anti-nodes, is positioned at the third component (37) by ultrasonic vibration causing the extending portion (31) to vibrate at a frequency in a predetermined frequency range
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An extending portion of a vibration transmitting unit is capable of transmitting ultrasonic vibration from a proximal side to a distal side, and in the extending portion, a second component provided on the distal side with respect to a first component. A third component provided between the first component and the second component in the extending portion has a third cross-sectional area that is larger than a first cross-sectional area of the first component and is smaller than a second cross-sectional area of the second component, and one of vibration anti-nodes is positioned at the third component by the extending portion vibrating at a frequency in a predetermined frequency range.