Gyro Sensor Temperature Correction via Dual Resonance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sensors, such as gyro sensors, face challenges in achieving high detection accuracy due to temperature variations and manufacturing inconsistencies, which affect the accuracy of rotation angle measurements.
Innovation Solution
The sensor design incorporates a base body with two structure bodies, one of which includes a movable member that vibrates along two directions, and a control device that corrects the rotation angle based on the resonance frequency of the second movable member, ensuring accurate temperature correction and uniform vibration characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature correction is applied using a single movable member, then the device complexity is reduced, but the measurement precision deteriorates due to insufficient temperature compensation
Solution Approach 1:
The sensor is divided into two independent structure bodies: a first structure body with a first movable member for rotation angle detection, and a second structure body with a second movable member dedicated to temperature correction. This segmentation allows each component to perform its specific function optimally without interfering with the other, thereby improving measurement precision while maintaining manageable device complexity through modular design
Solution Approach 2:
The second movable member acts as an intermediary element that indirectly measures temperature effects through its resonance frequency changes. Instead of directly measuring temperature, the system uses the resonance frequency of the second movable member as a mediator to detect temperature variations and apply corrections to the rotation angle measurements from the first movable member
2Measurement precision
If manufacturing tolerances are relaxed, then the ease of manufacture is improved, but the measurement precision deteriorates due to inconsistencies in movable member characteristics
Solution Approach 1:
The second movable member performs self-service by automatically tracking temperature-induced changes in its own resonance frequency and using this information to correct measurements from the first movable member. This self-compensation mechanism eliminates the need for external temperature sensors or complex calibration procedures, maintaining high measurement precision while simplifying the manufacturing process
Solution Approach 2:
The system monitors changes in the resonance frequency parameter of the second movable member as an indicator of temperature variation. By detecting and responding to this parameter change, the system can dynamically adjust and correct rotation angle measurements, thereby maintaining measurement precision despite variations in manufacturing tolerances
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 approach enhances the accuracy of rotation angle detection by stabilizing measurements against temperature changes and manufacturing variations, leading to improved sensor performance.
Implementation Method 1
a second movable member that vibrates; The second rotation angle is obtained by correcting the first rotation angle based on a resonance frequency of the second movable member
Data Source
Figure 1A~1B
Figure 2A~2D
Figure 3
AI summary
According to one embodiment, a sensor includes a base body including a first surface including first and second base body regions, a first structure body provided in the first base body region, a second structure body provided in the second base body region, and a control device. The first structure body includes a first movable member configured to vibrate. The vibration of the first movable member includes first and second components. The second structure body includes a second movable member configured to vibrate. The control device includes a controller configured to perform a processing operation. The processing operation includes outputting a second rotation angle. The second rotation angle is obtained by correcting a first rotation angle based on a resonance frequency of the second movable member. The first rotation angle of the first movable member is obtained based on the first component and the second component.