Rectangular Gasket Sealing for Pressure Sensor Units
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Solution Overview
Problem
Conventional pressure sensors in moisture-rich environments face sealing issues due to leaks around the gasket, affecting measurement and communication accuracy.
Innovation Solution
A pressure sensor unit with a rectangular gasket design that includes a base portion, column portion, and a passage for improved sealing, featuring a dimple for sensor orientation, multiple sealing areas, and a pneumatic passage, fabricated using plastic assembly techniques for enhanced sealing performance and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gasket is used for sealing, then the sensor is protected from moisture, but leaks occur around the gasket affecting measurement accuracy
Solution Approach 1:
The gasket is divided into multiple functional segments: a base portion for housing sealing, a column portion for sensor sealing, and a dimple feature for precise positioning. This segmentation allows each portion to address specific sealing challenges independently, eliminating leaks while maintaining measurement accuracy.
Solution Approach 2:
Different portions of the gasket have specialized properties: the base portion provides general environmental sealing, while the column portion provides sensor-specific sealing with a dimple feature for precise alignment. This local differentiation ensures optimal sealing performance at each critical location without compromising measurement precision.
2Reliability
If a rectangular gasket design is implemented, then sealing performance is improved, but manufacturing complexity increases
Solution Approach 1:
The rectangular gasket design serves multiple functions simultaneously: it provides sealing surfaces for both the housing and sensor, includes a dimple for sensor orientation, and integrates a pneumatic passage. This multi-functionality is achieved through a single molded component, actually simplifying manufacturing despite the complex geometry.
Solution Approach 2:
The gasket utilizes material elasticity and deformation parameters to achieve proper sealing. The column portion is designed to deform under sensor compression, and the dimple feature deforms to create a precise seal, allowing the rectangular geometry to be manufactured using standard injection molding techniques.
3Object-affected harmful factors
If multiple sealing areas are provided, then contamination is prevented, but device complexity increases
Solution Approach 1:
Multiple sealing functions are merged into a single integrated gasket structure. The base portion and column portion work together as one component, with the dimple feature and pneumatic passage incorporated during the same manufacturing process. This consolidation provides multiple sealing areas while avoiding the complexity of assembling separate sealing components.
Data Source
AI summary
An apparatus includes a gasket and a housing assembly. The gasket may have (i) a base portion, (ii) a column portion and (iii) a passage in communication with an exterior of the apparatus. The housing assembly may have a sealing edge and may be configured to hold a sensor. The sealing edge may seal to the base portion of the gasket. The sensor (a) may seal to the column portion of the gasket and (b) may be in communication with the exterior of the apparatus through the passage.