Seat Assembly with Movement-Adaptive Bladder and PEMF Control
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Solution Overview
Problem
Existing seat assemblies fail to effectively detect and reduce discomfort by not distinguishing between different types of movements and providing inadequate responses to user discomfort.
Innovation Solution
A seat assembly equipped with a sensor to detect small and large user movements, an electronic control unit (ECU) to activate bladder assemblies and a pulsed electromagnetic field (PEMF) coil assembly to reduce discomfort, operating in different modes based on movement types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a seat assembly uses a single mode operation for both small and large user movements, then the device complexity is reduced, but the effectiveness of discomfort reduction is insufficient
Solution Approach 1:
The seat assembly employs multiple operational modes (first mode for small movements, second mode for large movements) that dynamically adjust the response strategy based on the detected movement type. This dynamic adaptation allows the system to optimize discomfort reduction effectiveness for different user behaviors without requiring overly complex control logic.
Solution Approach 2:
The system changes operational parameters (bladder activation patterns, PEMF coil activation patterns) based on the detected movement state. For small movements, the system applies gentle bladder activation and PEMF therapy, while for large movements, it intensifies the response, thereby achieving effective discomfort reduction across different scenarios.
2Reliability
If the seat assembly activates all bladder assemblies and PEMF coils for all movement types, then the discomfort reduction coverage is maximized, but the energy consumption increases
Solution Approach 1:
The system applies different activation patterns to different portions of the seat assembly based on the detected movement type. For small movements, only specific bladder assemblies and PEMF coils are activated, while for large movements, a broader set is engaged. This localized approach ensures adequate discomfort reduction coverage while minimizing unnecessary energy consumption.
Solution Approach 2:
The system applies partial activation of bladder assemblies and PEMF coils appropriate to the movement severity. Rather than always activating all components, the system uses just enough activation to address the detected discomfort level, thereby reducing energy consumption while maintaining effective coverage.
3Device complexity
If the seat assembly does not distinguish between small and large user movements, then the measurement precision is reduced, but the device complexity is lowered
Solution Approach 1:
The movement detection system is segmented into different detection thresholds that distinguish between small and large movements. The sensor system divides the movement spectrum into distinct categories, allowing the ECU to apply appropriate response modes without requiring overly complex analysis algorithms.
Solution Approach 2:
The system uses sensor-based detection combined with ECU processing to distinguish movement magnitudes, replacing what would otherwise require complex mechanical differentiation mechanisms. This substitution of mechanical complexity with electronic sensing and processing achieves precise movement discrimination while keeping the overall device complexity manageable.
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 seat assembly effectively reduces small and large user movements by adjusting the bladder assemblies and PEMF coil activation, providing targeted relief for discomfort associated with different movement patterns.
Implementation Method 1
a sensor configured to sense movement of a user of the seat
Implementation Method 2
activating a bladder assembly proximate a lower portion of a seat back of the seat
Implementation Method 3
activating a pulsed electromagnetic field (PEMF) coil assembly proximate the lower portion of the seat back
Data Source
AI summary
A seat assembly may include a seat, a biomedical sensor, a bladder assembly, a pulsed electromagnetic field (PEMF) coil assembly, and/or an electronic control unit (ECU) connected with the biomedical sensor. The ECU may be configured to control the bladder assembly and the PEMF coil assembly, and/or to determine if a user occupying the seat is in a first state or a second state. The first state may correspond to one or more small user movements. Small user movements may include movements having magnitudes below a specified value or threshold. The second state may correspond to one or more large user movements. Large user movements may include movements having magnitudes above the specified value or threshold. The ECU may operate in a first mode when said user is in the first state and operate in a second mode when said user is in the second state.


