Vibration Sensor Centering Device for Uniform Adhesive Bonding
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Solution Overview
Problem
Existing vibration sensors face challenges in achieving uniform adhesive layers due to varying adhesive viscosity and application forces, leading to inconsistent measurement results, and require additional housing for centering components, which complicates the assembly process.
Innovation Solution
A vibration sensor design featuring a centering device, such as a hollow cylinder with radial openings, on the membrane to center the drive components and facilitate adhesive distribution through capillary action, eliminating the need for additional housing and ensuring consistent adhesive thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is applied to bond the drive components to the membrane, then the components are joined together, but the adhesive layer thickness varies due to viscosity and contact force, leading to inconsistent measurement results
Solution Approach 1:
The patent changes the physical state and application method of the adhesive from a free-flowing liquid to a viscous paste that is applied in a controlled manner. The adhesive is applied in a radially extending line that is later broken up into segments, transforming the application process from a continuous variable (amount of adhesive) to a controlled discrete process, thereby achieving uniform thickness independent of viscosity variations
Solution Approach 2:
The adhesive application is segmented into discrete portions applied at different radial positions. Instead of applying adhesive uniformly across the entire bonding surface, the patent applies adhesive in segmented lines that are then broken up, creating multiple controlled application points. This segmentation allows each portion to be independently controlled, ensuring consistent thickness across the entire bonding interface
2Manufacturing precision
If a housing is used to center the drive components on the membrane, then alignment is achieved, but the device complexity and component count increase
Solution Approach 1:
The patent extracts and eliminates the housing component entirely from the assembly. Instead of using a housing to provide structural support and centering, the membrane itself is designed with integrated centering features (such as raised regions or recesses) that directly perform the alignment function, thereby removing the need for a separate housing structure
Solution Approach 2:
The centering function is merged into the membrane structure itself. The membrane is designed with integrated features (raised regions, recesses, or shaped bonding surfaces) that simultaneously serve as both the functional membrane and the centering mechanism, combining multiple functions into a single component and eliminating the need for separate centering structures
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 allows for the production of uniformly thick, high-quality adhesive layers independent of adhesive amount, simplifies the assembly process, and reduces component count by eliminating the need for a separate housing, while ensuring precise component alignment and reliable bonding.
Implementation Method 1
introducing an adhesive into a space, adjacent to the drive and the membrane, whereby the adhesive is distributed between these elements due to a capillary action
Data Source
AI summary
Vibration sensor comprising a membrane, which can be excited to vibrate by means of a drive, wherein the drive has at least one piezo actuator, which is designed so as to be bonded with the membrane, wherein the membrane has at least one centering device that is designed to be suitable for orienting and keeping the drive centered relative to the membrane.