Micromechanical Gyroscope Dual-Axis Detection
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Solution Overview
Problem
Current micromechanical gyroscopes are limited in their ability to detect angular velocities in all directions due to their size, restricting differential detection capabilities.
Innovation Solution
A micromechanical gyroscope design featuring two movement members oscillating in perpendicular directions with a detection member positioned to detect displacement along a common axis, allowing for simultaneous detection of angular velocities in two directions through independent operation modes, enhanced by symmetric parts and a distributed drive mechanism for improved sensitivity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single movement member is used in conventional micromechanical gyroscopes, then the device size is reduced, but the ability to detect angular velocities in all directions is limited
Solution Approach 1:
The gyroscope is divided into multiple independent movement members (first movement member and second movement member) that can oscillate in different directions. Each movement member is coupled to the drive member through separate connection members, allowing independent operation and detection in different orientations, thereby achieving multi-directional detection capability while maintaining compact size.
Solution Approach 2:
The drive member serves multiple functions by being able to drive both the first movement member and the second movement member through different connection members. This multi-functional design allows the single drive mechanism to enable detection in multiple directions simultaneously, improving adaptability without proportionally increasing device size.
2Measurement precision
If two movement members with 180° phase difference are used for differential detection, then detection sensitivity is improved, but differential detection cannot be realized in all detection directions due to limited size
Solution Approach 1:
The patent introduces a third connection member that couples the first movement member and second movement member in addition to the existing connection members. This additional coupling dimension enables the system to achieve differential detection in multiple directions simultaneously by creating new oscillation modes that combine the effects of both movement members, thereby expanding detection direction coverage while maintaining sensitivity.
3Adaptability or versatility
If multiple movement members are added to achieve multi-directional detection, then detection capability is improved, but device complexity increases
Solution Approach 1:
The first movement member and second movement member are coupled together through the third connection member, merging their oscillation modes to create new detection capabilities. This merging approach allows the system to achieve multi-directional detection without requiring completely separate detection systems, thereby improving detection capability while controlling overall device complexity through integrated design.
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
Enables simultaneous detection of angular velocities in two directions with reduced interference and increased sensitivity, expanding application scenarios while improving detection accuracy and signal quality.
Implementation Method 1
the plurality of drive members driving the first movement member to oscillate along the first direction and the second movement member to oscillate along the second direction
Implementation Method 2
when the micromechanical gyroscope rotates with angular velocity of a direction perpendicular to the above plane, the movement member is applied with Coriolis force perpendicular to the above determined direction, and a displacement of the movement member will happen
Data Source
AI summary
A micromechanical gyroscope and an electronic device are related. The micromechanical gyroscope includes a first movement member, a second movement member, many drive members and a detection member, the first movement member has a first center, with two ends along a second direction oscillating around the first center along a first and a third directions, the second movement member has a second center, with two ends along the first direction oscillating around the second center along the second and third directions. The drive members can drive oscillations of the first and second movement members. The detection member is located above or below the first and second movement members in the third direction, to detect moving distances of the first and second movement members along the third direction. The micromechanical gyroscope can detect angular velocities in two directions simultaneously and perform differential detection to reduce errors, thus expanding application scenarios.