Offset Header Low Differential Pressure Transducer
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Solution Overview
Problem
Existing low differential pressure transducers face challenges in bringing out leads due to the need for different-sized diaphragms, leading to pressure variations and compromised operation, as the larger diaphragm is more compliant and experiences less back pressure.
Innovation Solution
A low differential pressure transducer design featuring a header with offset cylindrical housing, allowing diaphragms of the same size and diameter, with leads brought out through a semi-circle pin arrangement and a channel that minimizes oil usage, ensuring uniform operation and compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If leads are brought out through traditional arrangements, then leads can be connected, but diaphragms must be of different sizes causing pressure variations and operational compromise
Solution Approach 1:
The housing is designed with an asymmetric offset structure where the sensor is positioned offset from the center, allowing leads to be brought out through the offset section without interfering with the diaphragms. This asymmetric arrangement enables both diaphragms to be of equal size while still providing access for lead connections, thereby resolving the contradiction between ease of operation and measurement reliability
2Reliability
If diaphragms are made of equal size, then operational consistency is improved, but lead extraction becomes difficult
Solution Approach 1:
Instead of trying to extract leads from the traditional radial arrangement around the diaphragms, the invention moves the lead extraction path to a different spatial dimension by using the offset housing section. This allows leads to be brought out axially through the offset portion of the housing, eliminating interference with the equal-sized diaphragms while maintaining operational consistency
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 leads to be brought out expeditiously while maintaining diaphragms of equal size and diameter, reducing pressure variations and improving the operational consistency of the transducer.
Implementation Method 1
the sensing diaphragm communicates with the first and second diaphragms and deflects in accordance with the difference between the first and second pressures
Implementation Method 2
the piezoresistors employed on the diaphragm surfaces are connected together to form a bridge which will provide a differential output
Data Source
AI summary
It is an object of the present invention to provide a pressure transducer having a header wherein the header is comprised of a first section and a second section that are offset from each other. Each first and second section has a flexible diaphragm adapted to receive a first and second pressure, respectively. A central channel connects the diaphragms and a pressure sensor, located within the central channel, communicates with the channel and produces an output equal to the difference between the first and second pressures. The resultant device is a low differential pressure transducer which enables one to bring leads from the sensor out while having diaphragms of substantially the same size and diameter, therefore enabling the diaphragms to exhibit the same back pressure and be equally compliant.