Ring Piezoelectric Vibrator Layout for High-Q Phase-Coherent Vibration
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Solution Overview
Problem
Existing vibrators using a plurality of unit vibrators face challenges in maintaining coordinated vibration intensity and resonance frequency due to processing accuracy errors, leading to a decrease in Q-value.
Innovation Solution
A vibrator design utilizing a piezoelectric body made of zinc blende type single crystal with alternately arranged first and second vibrating portions, coupled by electrodes and reflection portions, which circulate vibration waves to enhance intensity and maintain phase coherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the resonance frequency is increased, then the vibration performance is improved, but the vibration intensity decreases due to processing accuracy errors
Solution Approach 1:
The vibrating portion is divided into multiple first vibrating portions and second vibrating portions that are alternately arranged. Each portion acts as an independent unit vibrator, and their combined vibration produces the desired high-frequency oscillation with enhanced intensity, overcoming the intensity loss associated with high resonance frequencies
Solution Approach 2:
Multiple unit vibrators are arranged in a two-dimensional configuration and electrically coupled through first and second coupling portions. The vibrations from individual units are merged and reinforced, producing coordinated vibration at high resonance frequency while maintaining sufficient vibration intensity through constructive interference
2Adaptability or versatility
If multiple unit vibrators are arranged two-dimensionally, then the vibration coordination in multiple directions is achieved, but the Q-value decreases due to processing accuracy errors
Solution Approach 1:
The first vibrating portions and second vibrating portions are arranged with different orientations and electrical coupling configurations. This asymmetric arrangement allows independent optimization of vibration characteristics in different directions while the coupling portions ensure phase coordination, maintaining high Q-value despite processing variations
Solution Approach 2:
Different regions of the vibrating portion have specialized functions: first vibrating portions are optimized for vibration in one direction, while second vibrating portions are optimized for vibration in an orthogonal direction. This local specialization allows each region to tolerate processing errors independently while contributing to overall coordinated vibration
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
The design increases vibration intensity and achieves a high Q-value by ensuring phase alignment of vibration waves, reducing distortion and thermal elastic loss.
Implementation Method 1
a vibrator using a piezoelectric body made of a zinc blende type single crystal
Data Source
AI summary
A vibrator using a piezoelectric body made of a zinc blende type single crystal includes a vibrating portion having a ring shape and having a plurality of first vibrating portions and a plurality of second vibrating portions alternately arranged in at least a part of the ring shape, wherein the vibrating portion includes first electrodes provided respectively to the plurality of first vibrating portions, second electrodes provided respectively to the plurality of second vibrating portions, a first coupling portion electrically coupling the first electrodes to each other, and a second coupling portion electrically coupling the second electrodes to each other, and the plurality of first electrodes and the plurality of second electrodes are alternately arranged on a plane perpendicular to a axis of the single crystal.