Composite Sensor Shield Pattern Impedance Noise Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Composite sensors with acceleration and angular velocity sensors mounted on a common mount member face interference from electrical noise, leading to decreased detection accuracy due to the positioning of connection members, which restricts vibration transmission and affects sensor performance.
Innovation Solution
A composite sensor design featuring a first and second shield pattern with varying impedance, where the first shield pattern connects the second and third shield patterns, preventing noise propagation between the sensors, thereby reducing mutual interference and maintaining detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common shield pattern is employed for both sensors, then the device complexity is reduced, but mutual interference of electrical noise between sensors occurs and detection accuracy decreases
Solution Approach 1:
The shield pattern is segmented into multiple independent shield patterns (first shield pattern for acceleration sensor, second shield pattern for angular velocity sensor) instead of using a single common shield pattern. This segmentation allows each sensor to have its own dedicated noise shielding, preventing mutual interference while maintaining manageable device complexity.
Solution Approach 2:
Different regions of the mount member are assigned different shield patterns with specific local functions. The first shield pattern is locally optimized for the acceleration sensor while the second shield pattern is locally optimized for the angular velocity sensor, allowing each sensor to receive tailored noise protection appropriate to its specific requirements.
Data Source
AI summary
A composite sensor includes a first shield pattern that functions as a noise shield of a circuit board, a second shield pattern that functions as a noise shield of a first sensor, and a third shield pattern that functions as a noise shield of a second sensor. The first shield pattern has an impedance lower than the second shield pattern and the third shield pattern. The second shield pattern and the third shield pattern are electrically connected to each other through the first shield pattern. Accordingly, deterioration of detection accuracy caused by electrical noise is restricted.