Throttle Element Damping Pressure Peaks in Fluid Sensors
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Solution Overview
Problem
Existing pressure sensors face increased manufacturing costs due to the need for laser weld points to secure the throttle element, and they are prone to pressure peaks and cavitation effects from vapor bubbles, which can cause preliminary damage to the sensor chip membrane.
Innovation Solution
A pressure sensor design featuring a symmetrically manufactured throttle element that is stamped or pressed into the pressure channel, eliminating the need for laser welding and allowing for independent assembly, which prevents pressure peaks and cavitation effects by damping high pressure pulses and vapor bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a throttle element is installed in the pressure channel to prevent pressure peaks and cavitation, then the sensor reliability is improved, but the manufacturing cost increases due to additional laser weld points
Solution Approach 1:
The throttle element is integrated directly into the pressure channel structure, merging two previously separate components (throttle element and pressure channel) into a single unified structure. This eliminates the need for separate securing operations like laser welding, thereby maintaining reliability while reducing manufacturing complexity and cost
Solution Approach 2:
The pressure channel is designed to serve multiple functions: it conveys the fluid medium and simultaneously houses the throttle element as an integrated component. This multi-functionality reduces the number of separate components and assembly steps, addressing the contradiction between reliability improvement and manufacturing cost increase
2Stability of the object's composition
If a throttle element is secured by laser weld points to prevent it from falling out, then the throttle element stability is improved, but the device complexity increases
Solution Approach 1:
The throttle element and pressure channel are merged into a single integrated structure, eliminating the need for separate securing mechanisms. The throttle element becomes an inherent part of the pressure channel geometry, ensuring stability without adding assembly complexity
Solution Approach 2:
The integrated structure serves itself by incorporating the throttle function directly into the pressure channel geometry. The structure that conveys the fluid also provides the throttling function, eliminating the need for additional securing operations and reducing overall device complexity
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 design reduces manufacturing costs and effectively prevents damage to the sensor chip membrane from pressure peaks and cavitation, ensuring reliable and cost-effective pressure measurement.
Implementation Method 1
a throttle element for throttling a pressure prevailing in the pressure channel, wherein the throttle element has at least one first recessed portion on a side facing the pressure sensor module and at least one second recessed portion on a side facing away from the pressure sensor module
Data Source
AI summary
A sensor is provided for recording a pressure of a fluid medium. The sensor includes a sensor housing, a pressure sensor module that is at least partially disposed in the sensor housing, a pressure connection having a pressure channel, and a throttle element for throttling a pressure prevailing in the pressure channel. On a side facing the pressure sensor module, the throttle element has at least one first recessed portion and, on a side facing away from the pressure sensor module, at least one second recessed portion.