Pressure Sensor Seal with Blocking Member
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Solution Overview
Problem
Conventional pressure sensors are exposed to the ambient environment, making them susceptible to damage from stray wires and dirt, leading to inaccurate measurements.
Innovation Solution
A package assembly with a cover that includes a fluid-flow channel and a blocking member, protecting the pressure sensing element while allowing fluid communication for accurate pressure measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure sensor is exposed to the ambient environment, then the sensor can measure ambient pressure, but the sensor becomes susceptible to damage from stray wires and dirt
Solution Approach 1:
A cover assembly acts as an intermediary between the pressure sensor and the ambient environment. The cover includes a fluid-flow channel that allows pressure transmission while a blocking member within the channel prevents direct physical contact between contaminants (stray wires, dirt) and the sensor, thus protecting the sensor while maintaining measurement capability
Solution Approach 2:
The cover assembly segments the protection function from the fluid transmission function. The cover body provides physical protection, while the fluid-flow channel with blocking member separately handles pressure transmission and contaminant filtration, allowing each component to be optimized for its specific function
2Reliability
If a cover with blocking member is added to protect the sensor, then the sensor is protected from contaminants, but the device complexity increases
Solution Approach 1:
The cover assembly merges multiple functions into a single integrated component: physical protection (cover body), fluid transmission (fluid-flow channel), and contaminant blocking (blocking member). This consolidation provides comprehensive sensor protection while minimizing the number of separate parts and assembly steps
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
The solution provides reliable and accurate pressure measurements by shielding the sensor from external contaminants and reducing the risk of damage, enhancing the overall performance of pressure sensors.
Implementation Method 1
The cover includes a fluid-flow channel configured to put the pressure sensing element in fluid communication with an environment external to the package enclosure
Data Source
AI summary
Some embodiments of the present disclosure relate to improved package assemblies for pressure sensing elements. Rather than leaving a pressure sensing element unabashedly exposed to the ambient environment in a manner that makes it susceptible to damage from stray wires, dirt, and the like; the improved package assemblies disclosed herein include a cover that helps form an enclosure around the pressure sensing element. The cover includes a fluid-flow channel with a blocking member arranged therein. The fluid-flow channel puts the pressure sensing element in fluid communication with the external environment so pressure measurements can be taken, while the blocking member helps protect the pressure sensing element from the external environment (e.g., stray wires and dirt to some extent). In this way, the package assemblies disclosed herein help promote more accurate and reliable pressure measurements than previous implementations.