Vibrating Gyroscope Air Gap Support Plate Isolation
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Solution Overview
Problem
Existing vibrating gyroscopes face challenges in accurately detecting rotational angular velocity due to interference from support plate vibrations, leading to shifted vibration frequencies and larger device sizes.
Innovation Solution
A vibrating gyroscope design that isolates torsional vibrations by using a support plate with a joining member and outer frame portion, allowing the vibrator to vibrate in an expected mode, with additional support portions and hollow portions to enhance vibration isolation, reducing the overall size and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the support plate is supported by supporting rods at locations outside the portion at which the vibrator is adhered, then the support plate can be supported at the node lines of bending vibration, but the support plate cannot freely bend and the torsional vibration of the vibrator is impeded, causing shifted vibration frequency and reduced measurement precision
Solution Approach 1:
The invention extracts the supporting rods from the system by replacing them with an air gap portion that suspends the joining portion without physical contact. This removal eliminates the harmful constraint on the support plate's bending motion while maintaining positional stability through the air gap configuration.
Solution Approach 2:
The air gap portion acts as an intermediary between the joining portion and the external environment, providing suspension without mechanical contact. This intermediary structure allows the support plate to bend freely while maintaining the joining portion's position, resolving the contradiction between stability and freedom of motion.
2Stability of the object's composition
If the support plate extends to regions around the two node lines of bending vibration to accommodate supporting rods, then the support plate can be properly supported, but the overall size of the vibrating gyroscope becomes relatively large
Solution Approach 1:
The invention removes the supporting rods and the need for the support plate to extend to node line regions. The air gap portion provides support functionality without requiring the plate to extend outward, thereby reducing the overall gyroscope size while maintaining support stability.
Solution Approach 2:
The invention transitions from a two-dimensional support structure (supporting rods on the plate surface) to a three-dimensional configuration (air gap providing vertical suspension). This dimensional change allows support functionality to be achieved without increasing the horizontal footprint of the device.
3Strength
If supporting rods are used to fix the vibrator to the case, then the vibrator is securely mounted, but the bending vibration of the support plate impedes the vibration of the vibrator, reducing reliability
Solution Approach 1:
The invention extracts the supporting rods that cause vibration impediment while maintaining vibrator mounting through the air gap suspension system. This removal eliminates the source of vibration interference while preserving secure mounting functionality.
Solution Approach 2:
The air gap portion serves as an intermediary mounting structure that secures the vibrator to the case without creating rigid constraints on the support plate. This intermediary configuration provides secure mounting while allowing the plate to vibrate freely, thereby maintaining detection reliability.
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 enables accurate detection of rotational angular velocity with reduced vibration interference, resulting in a smaller and more efficient vibrating gyroscope capable of performing signal processing operations.
Implementation Method 1
The vibrator 2 includes two tuning-fork-shaped piezoelectric substrates 3a and 3b that are laminated on each other
Implementation Method 2
when a rotational angular velocity about a central axis of the vibrating gyroscope 1 is applied, a Coriolis force is applied to the legs 2b and 2b along an axis substantially perpendicular to the direction of fundamental vibration
Data Source
AI summary
A vibrating gyroscope includes a tuning-fork vibrator having a base and legs. The vibrator is joined to a support plate by conductive adhesive members. The support plate includes an outer frame portion in which a joining portion is provided at a location near a longitudinal end of the outer frame portion. The joining portion is supported by a first support portion in the air gap portion. The width of the first support portion is less than the width of the joining portion. The vibrator is joined to the joining portion of the support plate.