Pressure Sensor Shock Mitigating Member Fluid Redirection
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Solution Overview
Problem
Conventional pressure sensors with diaphragms deteriorate quickly due to direct fluid impact, especially when fluids contain moisture or oil, leading to reduced durability.
Innovation Solution
A pressure sensor design incorporating a shock mitigating member with a first flow path that blocks linear fluid flow and redirects it through a second flow path, preventing direct impact on the diaphragm, and a gap between the mitigating member and the sensor's inner surface to adjust pressure, improving durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a through-hole orifice member is used to regulate fluid inflow, then pressure attenuation effect is provided, but the fluid still moves straightforward to the diaphragm and collision of moisture and oil readily damage the diaphragm
Solution Approach 1:
The flow route is segmented into multiple sections: a first flow route for pressure attenuation, a second flow route for fluid redirection, and a third flow route for final pressure equalization. This segmentation prevents direct linear flow to the diaphragm while maintaining pressure regulation functionality.
Solution Approach 2:
The shock mitigating member acts as an intermediary component between the orifice member and the diaphragm. It includes blocking walls that intercept and redirect fluid flow, preventing direct collision with the diaphragm while allowing pressure regulation to occur.
2Measurement precision
If the fluid flows linearly through the passage to the diaphragm, then pressure detection is direct, but the diaphragm receives direct fluid impact and durability deteriorates
Solution Approach 1:
The flow passage is divided into three distinct flow routes that separate the pressure detection function from the direct fluid impact path, allowing pressure measurement while protecting the diaphragm.
Solution Approach 2:
The fluid flow is redirected from a linear one-dimensional path into multi-dimensional pathways using the second and third flow routes, causing the fluid to move in different directions and preventing concentrated impact on the diaphragm center.
3Reliability
If a shock mitigating member with blocking wall is introduced to redirect fluid flow, then direct impact on diaphragm is prevented, but device complexity increases
Solution Approach 1:
The shock mitigating member integrates multiple functions into a single component: it contains the first flow route with the orifice member, the second flow route with blocking walls for redirection, and the third flow route for pressure equalization, all within one attached structure.
Solution Approach 2:
The shock mitigating member serves multiple purposes simultaneously: pressure attenuation through the first flow route, flow redirection through the second flow route, and pressure equalization through the third flow route, eliminating the need for separate components.
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 solution effectively prevents damage to the diaphragm by redirecting fluid flow, enhancing the sensor's durability and allowing for easy adjustment of the flow path area, facilitating maintenance and reducing shock on the diaphragm.
Implementation Method 1
a first flow path communicating with the passage and configured to cause the fluid to linearly flow, a wall portion provided so as to face the first flow path and configured to block the fluid from linearly flowing, and a second flow path configured to allow the first flow path and an opening formed in an outer circumferential surface of the shock mitigating member to communicate with each other, and configured to cause the fluid to flow in a direction different from an axial center of the first flow path
Implementation Method 2
A gap is formed between the shock mitigating member and an inner circumferential surface of the main body portion, wherein the gap is configured to adjust the pressure of the fluid flowing out from the opening
Implementation Method 3
a diaphragm configured to detect the pressure of the fluid flowing in the detection space
Data Source
AI summary
A pressure sensor includes a joint portion, and a shock mitigating member including therein a flow path communicating with a branch path. The shock mitigating member includes a first flow path configured to cause a fluid to linearly flow, a blocking wall configured to block the fluid from linearly flowing, and a second flow path communicating with the first flow path and configured to cause the fluid to flow in a direction different from an axial center of the first flow path. Further, the shock mitigating member includes outlets with which the second flow path communicates, and a gap for adjusting a pressure of the fluid is formed between the shock mitigating member and the joint portion.