Duplex Pressure Transducer Layout for Compact High-Accuracy Sensing
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Solution Overview
Problem
Conventional duplex pressure transducers face challenges in achieving improved accuracy while conforming to size and envelope restrictions, and there is a need for easy-to-make and use solutions that can withstand high temperatures and pressures.
Innovation Solution
A transducer baseplate design with a protrusion and opposed receptacles configured to accommodate larger high-temperature pressure capsules, allowing for increased accuracy and space efficiency, along with a transducer housing that can withstand extreme conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If larger pressure capsules are used to increase measurement accuracy, then measurement precision improves, but the device size increases which conflicts with envelope size restrictions
Solution Approach 1:
The patent transitions from a horizontal side-by-side arrangement of pressure capsules to a vertical stacked arrangement along the longitudinal axis. This dimensional reorganization allows larger diameter capsules to be accommodated within the same envelope by utilizing the vertical dimension, thereby improving measurement accuracy without increasing the transducer's horizontal footprint.
Solution Approach 2:
The design nests multiple pressure capsules vertically within a compact housing structure. The first and second pressure capsules are positioned one above the other, with each capsule containing its own diaphragm and fluid-filled chamber. This nested configuration maximizes the use of internal volume while maintaining a compact external envelope.
2Reliability
If high temperature and pressure resistance is improved to withstand extreme conditions, then reliability improves, but device complexity increases
Solution Approach 1:
The patent employs composite construction techniques where the housing combines multiple materials with different properties to withstand high temperatures and pressures. The pressure capsules use fluid-filled chambers with diaphragms made from materials selected for their thermal and pressure resistance, creating a composite structure that achieves high reliability without excessive complexity.
Solution Approach 2:
The transducer is divided into separate modular components including individual pressure capsules, each with its own diaphragm and fluid chamber. This segmentation allows each component to be optimized independently for temperature and pressure resistance, simplifying the overall design while improving reliability through specialized material selection for each segment.
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 design maintains less than ±1% error across a wide temperature and pressure range, accommodating larger capsules without increasing size, and ensures durability under high temperatures and pressures.
Implementation Method 1
Each plenum is in fluid connection with an area external to the protrusion through a respective pressure line
Data Source
Figure 1~2
Figure 3~4
AI summary
A transducer baseplate (100) includes a base (102), a protrusion (104) extending from the base along a longitudinal axis (A), a pair of opposed transducer receptacles (106) defined within the protrusion, and respective pressure plena (108). The pressure plena are separated by a plenum wall (110), each plenum being in fluid connection with an area external to the protrusion through a respective pressure line (112). The pressure lines provide a direct fluid path to their respective receptacles.