Vibration Element Asymmetric Processing Mark for Frequency Tuning
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Solution Overview
Problem
Existing vibration elements face challenges in accurately adjusting resonance frequencies due to variations in mounting position and processing position of frequency adjustment devices, leading to inconsistent weight removal and prolonged adjustment times.
Innovation Solution
A vibration element design featuring a weight with a processing mark that includes a first and second processing end, where the first processing end overlaps one weight end and has a narrower width than the second, reducing variations in the center of gravity position and frequency adjustment rate, even when the processing mark position shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If weight is removed from the vibration arm to adjust resonance frequency, then the resonance frequency can be tuned to target value, but the adjustment accuracy deteriorates due to position variations causing inconsistent weight removal
Solution Approach 1:
The processing mark is designed with asymmetric geometry where the first processing end has a narrower width than the second processing end. This asymmetric shape ensures that even when the processing position shifts due to mounting variations, the center of gravity position of the weight changes minimally, thereby maintaining consistent frequency adjustment accuracy
Solution Approach 2:
The processing mark is pre-designed with specific geometric dimensions before the actual weight removal process. By calculating and optimizing the widths of the first and second processing ends in advance, the system compensates for expected position variations, ensuring accurate frequency adjustment without requiring repeated iterations
2Productivity
If traditional weight removal method is used, then frequency adjustment can be performed, but the adjustment time increases due to repeated iterations required to reach target frequency
Solution Approach 1:
The processing mark geometry is optimized in advance to achieve the desired frequency adjustment in a single operation. By pre-calculating the appropriate widths for the first and second processing ends, the system eliminates the need for repeated weight removal iterations, significantly reducing adjustment time
Solution Approach 2:
The asymmetric processing mark design provides built-in compensation for position variations, creating a self-correcting system that maintains accurate frequency adjustment even when processing positions vary, thereby reducing the need for iterative adjustments
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 enhances adjustment accuracy and reduces the number of iterations required to reach the target resonance frequency, thereby shortening the frequency adjustment time and improving manufacturing efficiency.
Implementation Method 1
irradiating the weight with a laser or ion beam, and changing a resonance frequency of the vibration element by removing the weight
Implementation Method 2
irradiating the weight with a laser or ion beam, and changing a resonance frequency of the vibration element by removing the weight
Implementation Method 3
when an angular velocity in a predetermined direction is received with the drive vibration arm flexibly vibrated, Coriolis force acts on the drive vibration arm, and accordingly, the detection vibration arm is flexibly vibrated
Implementation Method 4
a physical quantity detection device that detects a physical quantity such as an angular velocity and acceleration using a vibration element such as a piezoelectric vibrator
Data Source
AI summary
A processing mark that is thinned or removed in a thickness direction of a vibration arm is formed at a weight provided at a drive vibration arm of a vibration element, and including a pair of weight ends aligned in an extending direction of the vibration arm. The processing mark includes a first processing end and a second processing end aligned in the extending direction of the vibration arm, the first processing end overlaps one weight end of the weight in plan view in the extending direction of the vibration arm, and a width of the first processing end is smaller than a width of the second processing end.