Coplanar Pressure Transducer Interface With Overload-Limiting Inserts
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Solution Overview
Problem
Existing differential pressure transducers face challenges in adapting to different customer connections without compromising measurement sensitivity and accuracy, particularly due to the use of silicon chips with low overload resistance.
Innovation Solution
A coplanar differential pressure transducer with a measuring unit featuring two separating diaphragms and a transducer chamber, equipped with ellipsoidal disk-shaped recesses and insert disks that allow adaptation to various hardware interfaces, ensuring the weld seams are outside the diaphragms to maintain functionality and integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If insert disks are added to adapt to different customer connections, then adaptability is improved, but device complexity increases
Solution Approach 1:
The process connection is divided into a base body and separate insert disks. The insert disks are removable components that can be exchanged to adapt to different customer connections (e.g., 3051 interface, IEC interface). This segmentation allows the main transducer body to remain simple while providing versatility through interchangeable parts.
Solution Approach 2:
The base body with standardized ellipsoidal recesses serves as a universal platform that can accommodate multiple types of customer connections through different insert disks. The ellipsoidal recess design with specific dimensional relationships (larger radius adjacent, smaller radii aligned with opposite edges) creates a universal mounting structure that works with various interface standards.
2Measurement precision
If weld seams are positioned outside the separating diaphragms, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The weld seams are strategically positioned in specific locations outside the separating diaphragms, creating zones of different quality requirements. The area within the diaphragm maintains high precision for measurement, while the outer areas where welds are located have relaxed precision requirements, allowing standard welding procedures to be used.
Solution Approach 2:
The ellipsoidal recesses are pre-formed in the base body with precise dimensional relationships before the insert disks are installed and welded. This preliminary structuring ensures that when insert disks are mounted, the weld seams naturally fall outside the critical diaphragm areas, protecting measurement precision while simplifying the welding process.
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
Enables flexible connection to multiple customer interfaces while protecting the pressure-sensitive element from overload, maintaining measurement accuracy and sensitivity by limiting overpressure to prevent chip damage.
Implementation Method 1
two pressures are applied to the separating diaphragms, said pressures being hydraulically transmitted via a corresponding capillary system to a pressure-sensitive measuring element
Data Source
AI summary
A coplanar differential pressure transducer includes a measuring unit with two separating diaphragms facing the process and a transducer chamber, wherein the measuring unit is configured as a process connection for a hardware interface, wherein, in an end face of a base body of the process connection facing the process, is a disk-shaped recess downstream of each separating diaphragm, each disk-shaped recess having different radii, which intersect in an ellipsoidal structure, wherein two insert disks corresponding to each ellipsoidal disk-shaped recess are mountable in the ellipsoidal disk-shaped recesses and are configured such that the process connection can be adapted to the hardware interface of a customer connection.