Control system for a pneumatic support mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high cost of manufacturing inflatable support mechanisms due to the use of multiple sensors and valves, particularly the expense of gauge pressure sensors and the complexity of systems requiring multiple absolute pressure sensors, which are then passed on to consumers.
Innovation Solution
A control system for an inflatable support mechanism that utilizes a single absolute pressure sensor to measure both bladder pressure and atmospheric pressure, reducing the number of components and simplifying the design by eliminating the need for multiple sensors and valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple absolute pressure sensors are employed to measure bladder pressure and atmospheric pressure separately, then measurement reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The single absolute pressure sensor is designed to perform multiple functions: measuring atmospheric pressure during deflation phases and measuring bladder pressure during inflation phases. This multi-functional approach eliminates the need for separate sensors while maintaining measurement reliability throughout the complete operational cycle.
Solution Approach 2:
The patent combines the functions of multiple pressure sensors into a single absolute pressure sensor. By integrating atmospheric pressure sensing and bladder pressure sensing capabilities into one device, the system reduces component count and complexity while achieving the same measurement objectives.
2Ease of manufacture
If gauge pressure sensors are used to measure bladder pressure, then manufacturing cost is reduced compared to absolute pressure sensors, but measurement precision and reliability deteriorate
Solution Approach 1:
The patent replaces the mechanical gauge pressure sensor system with an absolute pressure sensor system that uses atmospheric pressure as a reference. This substitution eliminates the need for complex gauge sensor mechanisms while providing more reliable and precise measurements through direct absolute pressure detection combined with atmospheric reference measurements.
3Adaptability or versatility
If multiple sensors and valves are used in the inflatable support mechanism, then functional versatility is improved, but manufacturing cost increases
Solution Approach 1:
The single absolute pressure sensor serves multiple functional purposes throughout the inflation and deflation cycles, providing both atmospheric pressure reference and bladder pressure measurement capabilities. This multi-functionality maintains the system's adaptability while significantly reducing the number of components required.
Solution Approach 2:
The system uses the atmospheric environment itself as a free reference source for pressure measurements. By opening the purge valve to allow atmospheric pressure to equalize in the conduit, the system obtains a reference pressure without requiring additional sensors or components, thereby reducing manufacturing costs while maintaining functional versatility.
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 solution reduces manufacturing complexity and costs, leading to lower prices for consumers by using a single absolute pressure sensor to control the inflation and deflation of inflatable bladders.
Implementation Method 1
No more than one absolute pressure sensor fluidically connected between the fluid inlet and the inlet of the at least one inflate valve and the inlet portion of the purge valve the no more than one absolute pressure sensor selectively sensing pressure within the inflatable support mechanism and atmospheric pressure
Data Source
AI summary
A control system for an inflatable support mechanism having a fluid inlet includes at least one inflate valve including an inlet, and a purge valve including an inlet portion and an outlet portion. The inlet portion is fluidically connected to the inlet. No more than one absolute pressure sensor is fluidically connected between the fluid inlet and the inlet of the at least one inflate valve and the inlet portion of the purge valve the no more than one absolute pressure sensor selectively sensing pressure within the inflatable support mechanism and atmospheric pressure.