H-Shaped Header Differential Pressure Transducer
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Solution Overview
Problem
Existing low differential pressure transducers face challenges in bringing out leads from semiconductor sensors, leading to unequal diaphragm sizes, which affects the device's operation by causing pressure variations and compromising compliance.
Innovation Solution
A pressure transducer design featuring an H-shaped header with equal-sized diaphragms and an oil-filled channel system allows for the same-size diaphragms to be used, enabling leads to be brought out efficiently while maintaining uniform back pressure and compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If leads are brought out from semiconductor sensor in prior art devices, then leads can be connected, but diaphragm sizes become unequal which compromises operation
Solution Approach 1:
The header is designed with an asymmetric H-shaped structure where the front and back sections have different geometries. The front section has a larger outer diameter than the back section, allowing unequal diaphragm sizes to be accommodated while maintaining equal active diaphragm areas for pressure sensing. This asymmetric design enables lead extraction through the larger front section without compromising the equality of the sensing diaphragms.
Solution Approach 2:
The header is segmented into distinct front and back sections with different dimensions. The front section accommodates one diaphragm while the back section accommodates the other diaphragm, allowing each section to be optimized independently for its specific function while maintaining overall system integrity.
2Adaptability or versatility
If larger diaphragm is used, then back pressure decreases and compliance increases, but diaphragm sizes must be unequal in prior art devices
Solution Approach 1:
The header employs asymmetric dimensions in its front and back sections, with the front section having a larger outer diameter. This allows the housing to accommodate diaphragms of different overall sizes while ensuring that the active sensing areas remain equal, thus maintaining manufacturing precision for the critical sensing function while allowing compliance optimization.
3Reliability
If equal size diaphragms are used, then compliance and back pressure are uniform, but leads cannot be brought out in prior art devices
Solution Approach 1:
The H-shaped header features asymmetric front and back sections with different outer diameters. This asymmetry provides an enlarged front section through which leads can be extracted without interfering with the equal-sized diaphragms in the back section, thus enabling both equal diaphragm sizes for consistent pressure measurement and practical lead extraction.
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 ensures equal compliance and back pressure across both diaphragms, improving the operational consistency and accuracy of the differential pressure transducer by allowing leads to be brought out without compromising diaphragm size.
Implementation Method 1
a channel positioned within said central section and extending and communicating with said first and second depressions
Implementation Method 2
said sensor diaphragm deflects in accordance with the difference in pressure applied to said sides
Data Source
AI summary
A pressure transducer has an H-shaped header having a front and a back section. The front and back sections are of equal diameter and are circular. Each front and back section has a depression with a diaphragm covering the depression. Each diaphragm is of equal size and the depressions communicate one with the other via a central channel in the central arm of the H. A pressure sensor communicates with the channel, where the pressure sensor responds to a first pressure applied to the first diaphragm and a second pressure applied to the second diaphragm. The pressure sensor produces an output equal to the difference in pressure. The differential pressure inducer having both diaphragms of the same size and still enabling leads from the sensor to be brought out.