Smart Insole COP Detection and Targeted Vibration for Balance
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Solution Overview
Problem
Existing wearable devices fail to effectively enhance balance by accurately detecting the center of pressure (COP) and providing targeted vibrations to correct gait patterns, leading to instability and potential falls.
Innovation Solution
A smart insole equipped with pressure sensors and vibrators that determine the COP and adjust vibration intensity based on its positional relationship to a setting point, providing differential vibrations to enhance balance by sensitizing specific areas of the foot to re-center the COP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure sensors and vibrators are added to shoes to detect gait pattern and assist stable walking, then balance enhancement capability is improved, but device complexity increases
Solution Approach 1:
The insole is divided into multiple functional zones with pressure sensors and vibrators strategically positioned at specific locations (front, rear, left, right) to detect COP position and provide targeted vibrations. This segmentation allows the system to achieve balance enhancement through localized sensing and actuation without requiring a complete coverage system, thereby managing device complexity.
Solution Approach 2:
Different regions of the insole are assigned different functions: pressure sensors are placed at specific locations to detect COP position, and vibrators are positioned to provide targeted vibrations based on COP deviation. The controller selectively activates specific vibrators based on the detected COP position, creating local quality variations that enhance balance without requiring uniform distribution of all components throughout the insole.
2Reliability
If multiple vibrators are controlled based on COP position to provide targeted vibrations, then balance correction effectiveness is improved, but control system complexity increases
Solution Approach 1:
The controller dynamically adjusts vibrator activation based on real-time COP position detection. The system transitions from static vibrator control to dynamic control where the activation state and intensity of vibrators change according to the detected COP deviation. This dynamic approach enables effective balance correction while managing control complexity through rule-based decision making (e.g., activate rear vibrator when COP is forward).
Solution Approach 2:
The system implements feedback control by continuously monitoring COP position through pressure sensors and using this information to adjust vibrator activation. The controller receives feedback from pressure sensor data, determines COP position, and accordingly controls vibrator output to correct balance deviations. This closed-loop feedback mechanism ensures effective balance correction while keeping the control logic straightforward through clear cause-effect relationships.
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 smart insole effectively enhances balance by selectively applying vibrations to adjust foot sensitivity, thereby improving stability and reducing the risk of falls by re-centering the COP, ensuring a more stable gait.
Implementation Method 1
a plurality of pressure sensors associated with the support layer, the plurality of pressure sensors configured to sense a pressure applied thereto by a foot of the user
Implementation Method 2
a plurality of vibrators associated with the support layer, the plurality of vibrators configured to generate a vibration
Data Source
AI summary
Provided is a smart insole including a support layer; a plurality of pressure sensors provided to the support layer and configured to sense a pressure; a plurality of vibrators provided to the support layer and configured to generate a vibration; and a controller configured to determine a center of pressure (COP) based on a pressure sensed by each of the plurality of pressure sensors and to control the plurality of vibrators based on a positional relationship between a setting point and the COP.