Adaptive Insole with Variable Compressibility Bladders
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Solution Overview
Problem
Existing orthotic inserts fail to effectively offload pressure from localized plantar surface areas, leading to discomfort or harm due to concentrated pressure, especially in scenarios where foreign bodies are present in footwear or in cases of foot injuries, and they do not automatically adjust to alleviate pressure.
Innovation Solution
A system comprising an insole with adjustable compressible bladders and pressure sensors that adjust compressibility based on measured pressure thresholds, redistributing pressure from high-pressure areas to other areas of the foot, using either electromagnetic field control or fluid management to alter bladder compressibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If passive orthotic inserts are used, then foot support is provided, but pressure cannot be dynamically adjusted to offload localized high-pressure areas
Solution Approach 1:
The patent applies dynamics by making the insole system adjustable and adaptive rather than static. Multiple bladders with variable compressibility allow the insole to dynamically change its pressure distribution characteristics in response to detected pressure levels, transforming a passive support structure into an active, responsive system
Solution Approach 2:
The patent implements feedback through pressure sensors that continuously monitor pressure distribution on the plantar surface. This feedback is processed by a controller that adjusts bladder compressibility in response to detected high-pressure areas, creating a closed-loop control system that automatically adapts to the user's needs
2Object-affected harmful factors
If compressible bladders are added to enable pressure redistribution, then pressure offloading capability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the insole into multiple independent bladder sections, each capable of independent compressibility adjustment. This segmentation allows targeted pressure management in different foot regions while maintaining a modular structure that can be manufactured and assembled systematically
Solution Approach 2:
The patent utilizes pneumatic or hydraulic principles by filling bladders with fluid or gas that can be pressurized or depressurized to control compressibility. This approach enables smooth, continuous adjustment of pressure characteristics and provides a reliable mechanism for distributing loads across different foot areas
3Speed
If electromagnetic field control is used to adjust bladder compressibility, then rapid pressure response is achieved, but energy consumption and device complexity increase
Solution Approach 1:
The patent applies parameter changes by utilizing electromagnetic fields to alter the physical properties of the bladder material or fluid, specifically changing compressibility as a controllable parameter. This allows rapid adjustment of pressure characteristics without mechanical moving parts, achieving fast response times through field-based control
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 system automatically reduces pressure on high-risk areas, providing comfort and preventing injuries by dynamically adjusting the insole's compressibility to redistribute force, thus alleviating pressure and improving gait and joint stress distribution.
Implementation Method 1
each bladder of the plurality of bladders includes (i) a fluid having a compressibility that varies based on an electromagnetic field applied to the fluid and (ii) a controllable electromagnetic source configured to apply a variable electromagnetic field to the fluid, and adjusting the compressibility of the respective bladder includes causing the electromagnetic source of the respective bladder to adjust the electromagnetic field applied to the fluid of the respective bladder
Implementation Method 2
each bladder of the plurality of bladders includes a fluid, the compressibility of each bladder depends on an amount of the fluid in the bladder, the system further comprises a pump configured to pump the fluid to or from each bladder, and adjusting the compressibility of the respective bladder includes causing the pump to pump the fluid to or from the respective bladder
Implementation Method 3
A plurality of pressure sensors are also coupled to the insole, and each pressure sensor of the plurality of pressure sensors is configured to measure a pressure exerted on a respective portion of the foot
Data Source
AI summary
A plantar surface pressure offloading system includes an insole capable of coupling with a shoe and interfacing with a foot. A number of compressible bladders and pressure sensors are coupled to the insole. Each bladder has an adjustable compressibility, and each pressure sensor is configured to measure a pressure exerted on a respective portion of the foot. A controller of the system can perform, for each compressible bladder, a compressibility adjustment process including (i) receiving, from a respective pressure sensor associated with a respective bladder, a signal indicative of a pressure exerted on a respective portion of the foot, (ii) determining, based on the signal, that the pressure exerted on the respective portion of the foot exceeds a threshold pressure, and (iii) responsive to the determination, adjusting the compressibility of the respective bladder, thereby offloading pressure from the respective portion of the foot to a different portion of the foot.