Angular Velocity Sensor with Segmented Arms for Lateral Acceleration Rejection
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Solution Overview
Problem
Angular velocity sensors face challenges in distinguishing between vibrations caused by angular velocity and translational acceleration, particularly in lateral directions, due to complex configurations that either compromise stability or fixation, and existing solutions complicate the fixation process.
Innovation Solution
A horizontally located angular velocity sensor design with upper and lower detection arms coupled directly or indirectly to drive arms without a fixed section in between, allowing direct transmission of Coriolis force distortions, and an integrated circuit for drive and detection signal transmission, facilitating easy fixation and improved vibration distinction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the fixed section is firmly fixed on the support surface, then the stability of the detection arms is improved, but the transmission efficiency of Coriolis force distortion deteriorates
Solution Approach 1:
The sensor is divided into separate functional sections: a fixed section for stable mounting, drive arms for generating Coriolis force, and detection arms for sensing. This segmentation allows the fixed section to be firmly mounted while the drive and detection arms remain mechanically coupled through flexible connections that transmit Coriolis force distortion efficiently.
Solution Approach 2:
Flexible connections serve as intermediaries between the fixed section and the drive/detection arms. These flexible connections transmit Coriolis force distortion from the drive arms to the detection arms while allowing the fixed section to remain firmly fixed, thus resolving the contradiction between stable mounting and efficient force transmission.
2Reliability
If the fixed section is weakly fixed on the support surface, then the transmission of Coriolis force distortion is improved, but the stability of the detection arms deteriorates
Solution Approach 1:
By separating the fixed section from the drive and detection arms, the invention allows the fixed section to be firmly mounted for stability while the drive and detection arms are connected through flexible elements that enable efficient Coriolis force transmission without requiring weak fixation.
Solution Approach 2:
The flexible connections act as intermediaries that decouple the stability requirement of the fixed section from the force transmission requirement of the drive and detection arms, allowing both to be optimized independently.
3Reliability
If a complicated configuration of the fixed section with multiple flexural bridges is provided, then the transmission efficiency of Coriolis force distortion is improved, but the ease of fixation deteriorates
Solution Approach 1:
The invention segments the force transmission path into separate drive arms and detection arms that are mechanically coupled, eliminating the need for a complicated fixed section with multiple flexural bridges. This simplifies the fixation process while maintaining efficient Coriolis force transmission through the direct mechanical coupling of the arm sections.
Solution Approach 2:
The invention extracts the Coriolis force transmission function from the fixed section and relocates it to the mechanical coupling between drive and detection arms. This removes the complexity of the fixed section configuration while preserving the essential force transmission function.
4Measurement precision
If the sensor is designed to eliminate lateral acceleration influence, then the measurement precision of angular velocity is improved, but the device complexity increases
Solution Approach 1:
The detection arms are positioned and oriented asymmetrically with respect to the drive arms, creating a configuration where lateral accelerations affect both arms equally while Coriolis forces create differential effects. This asymmetric arrangement enables automatic elimination of lateral acceleration influence through signal differential processing, improving measurement precision without requiring additional complex components.
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 the detection accuracy of angular velocity by efficiently transmitting Coriolis force distortions and eliminating lateral acceleration influences, while simplifying the fixation process and potentially miniaturizing the sensor.
Implementation Method 1
distortion generated by a Coriolis force acting on the pair of upper drive arms and the pair of lower drive arms
Data Source
AI summary
Proposed is a horizontally located angular velocity sensor hardly affected by a translational acceleration in a lateral direction, and in which a fixed section is easily fixed. The angular velocity sensor includes a fixed section fixed on a support surface. On both sides of the fixed section, an arm section of an upper detection arm and a pair of upper drive arms extending along a plane parallel to the support surface, and an arm section of a lower detection arm and a pair of lower drive arms extending along the plane parallel to the support surface are coupled, respectively. The upper detection arm and the pair of upper drive arms are coupled without the fixed section in between, and the lower detection arm and the pair of lower drive arms are coupled without the fixed section in between.