Vibration Element Noise Shielding via Constant Potential Terminal
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Solution Overview
Problem
Existing vibration elements face challenges in reducing noise incorporation into detection signal terminals, leading to decreased detection accuracy due to the limited functionality of the detection ground terminal as a shield layer and the increased surface area of signal terminals.
Innovation Solution
The proposed configuration includes a vibration element with a detection signal electrode and terminal positioned on one side of the support portion, a constant potential terminal positioned further towards the first end portion, and a detection ground electrode connected to the constant potential terminal, which reduces noise incorporation by effectively using the constant potential terminal as a shield layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the detection signal terminal and drive signal terminal are disposed to extend over the lower surface and the upper surface of the support portion to increase their areas, then the terminal areas are increased, but noise is easily incorporated from these terminals, causing detection accuracy to decrease
Solution Approach 1:
A constant potential terminal is introduced as an intermediary element between the detection signal terminal and the drive signal terminal. This constant potential terminal acts as a mediator that maintains a stable electrical potential, preventing noise coupling from the drive signal terminal to the detection signal terminal while allowing the signal terminals to maintain their extended configuration for adequate area.
2Object-affected harmful factors
If the detection ground terminal is positioned between connection portions with the pair of beam portions of the support portion to function as a shield layer, then noise reduction capability is improved, but the detection ground terminal cannot be sufficiently widely formed, limiting its shielding function
Solution Approach 1:
The constant potential terminal serves as an additional intermediary shielding element that complements the detection ground terminal. By positioning the constant potential terminal to overlap with the detection signal terminal, it provides enhanced noise shielding without requiring the detection ground terminal to be excessively large, thus maintaining effective shielding while respecting spatial constraints.
3Device complexity
If the detection signal terminal is positioned to overlap the drive signal terminal, then electrical connection is simplified, but noise from the drive signal terminal is incorporated into the detection signal terminal, decreasing detection accuracy
Solution Approach 1:
The constant potential terminal is strategically positioned to overlap both the detection signal terminal and the drive signal terminal, creating an intermediary shielding barrier. This arrangement maintains the simplified overlapping configuration for electrical connection while introducing the constant potential terminal as a noise-blocking mediator that prevents direct noise coupling between the signal terminals.
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 configuration enhances detection accuracy by minimizing noise incorporation into the detection signal terminal, thereby improving the reliability of the vibration element and associated sensors and electronic apparatus.
Implementation Method 1
a portion of the constant potential terminal is disposed so as to be positioned further toward the first end portion side than a connection portion with the beam portion of the support portion... effectively using the constant potential terminal as a shield layer
Data Source
AI summary
A vibration element includes a detection signal electrode provided in a detection vibrating arm, a detection signal terminal which is provided in a support portion and electrically connected to the detection signal electrode, and a detection ground terminal provided in the support portion, and the detection ground terminal is disposed between a first connection portion which is a connection portion with a beam portion of the support portion and a second connection portion which is a connection portion with a beam portion, and is provided to extend to the outside of the first connection portion, and the detection signal terminal is provided between the detection ground terminal and an end portion of the support portion.