Tunable Pressure Transducer Filter Assembly
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Solution Overview
Problem
Pressure transducer assemblies used in systems like gas turbine engines are affected by pressure ripples, leading to reduced lifespan and high costs due to the need for custom designs for each system, as existing solutions either require costly filter assemblies or are not adaptable to various systems.
Innovation Solution
A tunable pressure transducer assembly with a filter assembly comprising a cap and tube that can be adjusted to control pressure access and frequency, allowing for the same assembly to be adapted for different systems by varying the dimensions and position of the cap and tube to achieve desired dampening frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter assembly is designed specifically for each individual system, then high frequency pressure ripples are eliminated, but manufacturing costs increase significantly
Solution Approach 1:
The filter assembly is designed with adjustable components (cap and tube) that can be configured to work with multiple different systems. The tube can be positioned at different distances from the sensing element, and the cap can be adjusted to create different enclosed volumes, allowing a single filter assembly design to adapt to various system requirements and eliminate pressure ripples across different applications without requiring custom designs for each system.
Solution Approach 2:
The filter assembly incorporates adjustable and reconfigurable elements rather than fixed components. The tube position relative to the sensing element can be varied, and the cap can be positioned at different distances, enabling the filter to be tuned dynamically to match different system characteristics and pressure ripple frequencies, thereby eliminating the need for completely different filter designs for each application.
2Measurement precision
If pressure transducers are designed with minimal resonances near ripple frequencies, then measurement accuracy is improved, but design complexity and development time increase
Solution Approach 1:
The filter assembly acts as an intermediary component between the pressure source and the sensing element. Instead of modifying the sensing element itself to avoid resonances, the filter assembly preprocesses the pressure signal by eliminating high frequency ripples before they reach the sensor, thereby protecting the sensing element from resonant conditions without requiring complex resonance-free sensor design.
3Object-affected harmful factors
If custom filter assemblies are created for each system, then pressure ripple elimination is optimized, but adaptability to various systems is reduced
Solution Approach 1:
The filter assembly is divided into separable, adjustable components including the cap, tube, and the sensing element housing. This segmentation allows individual components to be adjusted or repositioned to optimize performance for different systems. The tube can be moved to different positions, and the cap can be adjusted independently, enabling customization for various applications while using the same basic filter assembly design.
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 solution enables a single pressure transducer design to be tuned for multiple systems, reducing costs and extending the lifespan by effectively filtering out high-frequency ripples while allowing static and quasi-static pressures to be measured accurately.
Implementation Method 1
The filter assembly is operative to substantially reduce high frequency pressure ripples and allow static and quasi-static pressures to pass through to the sensing element
Data Source
AI summary
A tunable pressure transducer assembly that comprises a sensing element disposed within a housing, wherein the sensing element is adapted to output a signal substantially indicative of an applied pressure, and a filter assembly also disposed within the housing. In one example embodiment, a method includes receiving, at a filter assembly having a tube, a cap and a cavity defined by a housing, a pressure, wherein the cap is positioned to set a predetermined volume of the cavity and the tube is associated with an application of the pressure to the cavity, wherein the pressure includes a static pressure component and a dynamic pressure component; filtering, by the tube and the cavity, at least a portion of the dynamic pressure component of the pressure to obtain a filtered pressure; outputting, from the filter assembly, the filtered pressure; and wherein the filtered pressure is used to determine the static pressure component of the pressure.