Resonator Lumped Mass Wing Unit Low Frequency Sensing
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Solution Overview
Problem
Resonators with increased length for low frequency characteristics suffer from reduced rigidity and increased size, compromising their reliability and manufacturing cost.
Innovation Solution
A resonator design featuring a vibration beam with a lumped mass unit comprising a base unit and a wing unit separated from the beam, where the wing unit's volume is greater than the contact area with the beam, maintaining low frequency sensitivity while minimizing size and material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the length of the resonator is increased to ensure low frequency characteristic, then the resonator is capable of sensing low frequency, but the size of the whole system increases and the rigidity of the resonator is reduced
Solution Approach 1:
The resonator structure is segmented into distinct functional components: a vibration beam for sensing, a lumped mass unit for frequency tuning, and a supporting member for fixation. This segmentation allows optimization of each component independently, enabling low frequency sensing without proportionally increasing the entire resonator length.
Solution Approach 2:
Instead of increasing length in one dimension to achieve low frequency characteristics, the patent introduces a lumped mass unit that extends in another dimension (perpendicular to the vibration beam). This dimensional transition allows frequency tuning without compromising the beam's length and rigidity.
2Measurement precision
If the length of the resonator is increased to ensure low frequency characteristic, then the resonator is capable of sensing low frequency, but the size of the whole system increases
Solution Approach 1:
The patent transitions from length-based frequency control to mass-based frequency control by introducing a lumped mass unit with volume greater than the contact area times thickness. This allows low frequency sensing to be achieved through mass addition rather than length extension, thereby reducing system size.
3Measurement precision
If the lumped mass unit is designed with large volume for low frequency characteristic, then the detecting sensitivity is improved, but the material deposition thickness increases
Solution Approach 1:
The lumped mass unit is segmented into a base unit (for contact) and a wing unit (for mass). This segmentation allows the mass to be distributed in a configuration that achieves the required volume without proportionally increasing the contact area thickness, thus maintaining manufacturing precision while improving detecting sensitivity.
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 enhances detecting sensitivity and reduces manufacturing costs by maintaining resonator reliability and sensitivity without increasing size or material deposition thickness.
Implementation Method 1
a vibration beam configured to vibrate in response to an external signal
Implementation Method 2
The sensing unit may include a piezoelectric material
Data Source
AI summary
Provided are resonators, a resonator system including the resonators, and a method of manufacturing the resonators. The resonator includes a vibration beam configured to vibrate in response to an external signal, a sensing unit configured to detect the movement of the vibration beam, and a lumped mass unit including a base unit that contacts the vibration beam and a wing unit arranged separately from the vibration beam on the base unit.