Pressure Sensor Assembly With Elastic Mounting and Tolerance Compensation
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Solution Overview
Problem
Existing pressure sensor devices have complex structures, reliability issues, and are difficult to produce and automate due to their delicate components and small dimensions.
Innovation Solution
The pressure sensor device features an elastically mounted sensor body within a chamber, using a seal element or gasket for association, and a separate positioning body with elastic contact elements to compensate for positioning tolerances, along with a ventilation hole and electromagnetic shielding, allowing for automated assembly without damaging delicate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the sensor body is rigidly fixed into the chamber, then the structural stability is improved, but the risk of mechanical stress and damage to delicate components increases
Solution Approach 1:
The device is divided into separate functional modules: the sensor body, the circuit board, and the positioning body. This segmentation allows each component to be optimized independently and assembled with appropriate mounting methods that reduce mechanical stress while maintaining structural stability.
Solution Approach 2:
A positioning body acts as an intermediary element between the sensor body and the circuit board. This intermediary component provides precise positioning and electrical connection while isolating the delicate sensor membrane from direct mechanical constraints, thereby reducing stress concentration and damage risk.
2Reliability
If the sensor body is elastically mounted using seal elements, then the risk of mechanical stress is reduced, but the positioning precision and stability may deteriorate
Solution Approach 1:
The positioning body serves as a mediator that provides precise positioning features (such as定位 holes and guide pins) while the seal elements provide elastic mounting. This combination achieves both accurate positioning and reduced mechanical stress by distributing forces through the positioning structure.
Solution Approach 2:
Different parts of the mounting system have different functional qualities: the positioning body provides rigid geometric constraints for precision, while the seal elements provide compliant force distribution for stress reduction. This local differentiation of mounting characteristics achieves both precision and reliability.
3Ease of manufacture
If the device structure is simplified for easier manufacturing, then the manufacturing cost and ease of production are improved, but the functionality and reliability may worsen
Solution Approach 1:
The device is segmented into modular components that can be manufactured using standard, cost-effective processes and assembled through straightforward operations. This segmentation enables simplified manufacturing while maintaining full functionality through proper component integration.
Solution Approach 2:
The positioning body performs multiple functions simultaneously: it provides mechanical positioning, electrical connection support, and structural alignment. This multi-functionality reduces the overall component count and assembly complexity while ensuring reliable device operation.
4Productivity
If automated assembly is implemented, then the productivity is improved, but the risk of damaging delicate components during assembly increases
Solution Approach 1:
The positioning body is designed with pre-formed positioning features (定位 holes, guide pins, engagement protrusions) that guide automated assembly equipment. This preliminary preparation of positioning structures enables automated handling and assembly without damaging the delicate sensor membrane or other 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 results in a cost-effective, reliable, and accurate pressure sensor device that can be easily assembled, reducing measurement errors and mechanical stress risks while maintaining stability and accuracy over time.
Implementation Method 1
the sensor body is not rigidly associated to the casing, i.e. it is mounted elastically with respect to the casing and/or to other parts of the device inside the chamber, preferably through at least one seal element or gasket
Implementation Method 2
operatively interposed between the first portion of the terminals and a circuit support are elastic contact elements, the elastic contact elements being configured and arranged to be in a compression condition between the first portion of the terminals and the circuit support, particularly with the aim of compensating possible positioning tolerances or movements between parts of the device
Data Source
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AI summary
A pressure sensor device comprises a casing (2a, 3a) defining a chamber (20) and an inlet passage (14a, 14b) of the chamber. Accommodated in the chamber (20) is a pressure sensor (17) having a sensor body with a cavity and a membrane capable of deformation under pressure action of a fluid present in the inlet passage (14a, 14b). The device further comprises a circuit arrangement (26, 27, 30) to which the pressure sensor (17) is electrically connected, the circuit arrangement including a circuit support at least partially accommodated in the chamber (20). The sensor body is not rigidly associated to the casing (2a, 3a) and/or to other parts of the device (26, 27, 30, 35), i.e. it is mounted elastically or in a moveable manner with respect to the casing (2a, 3a) and/or to said other parts (26, 27, 30, 35) inside the chamber (20).