Catalyst Awardee

Project Description

Smart insole for 3 D force measurement

 

Chao-Ching Ho, PhD | National Taipei University of Technology; Jung-Tang Huang, PhD; Chuan-Yu Lo, MS; Che-Yu Chang; Yi-Ming Li; Wei-Ting Zheng
Competition Sponsor:
Academia Sinica
Awardee Year: 2022

In this project, a magnetic sensing IC array will be integrated into a flexible circuit board to develop a smart insole for measuring the normal pressure and shear stress of the sole of the foot. At present, most plantar pressure sensing insoles can only measure and analyze the normal pressure, but the actual action of the foot usually includes the shear stress. Bearing force from different directions, if the force of three axes can be measured, it will be possible to further analyze the force on the foot, and it can also help patients to protect their feet or help athletes to know how to make use of their foots optimally.
It will develop machine learning models between the applied 3D forces and the 3D magnetic field readouts of the magnetic sensing IC based on our home-made automatic calibration platform of 3D force load-cell. In summary, the following benefits are expected: 1) all-in-one insole: provide three-axis force and 3D trajectory of the foot based on 9-axis IMU measurement and calculation; 2)Multi-point detection: detect multi-point force at the same time; 3)Easy calibration:(A) The production of magnet silicone gaskets is standardized, and the gaskets are standardized through high-precision molds and calibration methods.(B) Various models are pre-designed, and the models are self-adjusted when the sensor is replaced. (C) Adjust the rigidity of the magnet silicone gasket, which will be attached on the top of the magnetic field sensor, so as to be used for foot patients.
In this project, a magnetic sensing IC array will be integrated into a flexible circuit board to develop a smart insole for measuring the normal pressure and shear stress of the sole of the foot. At present, most plantar pressure sensing insoles can only measure and analyze the normal pressure, but the actual action of the foot usually includes the shear stress. Bearing force from different directions, if the force of three axes can be measured, it will be possible to further analyze the force on the foot, and it can also help patients to protect their feet or help athletes to know how to make use of their foots optimally.
It will develop machine learning models between the applied 3D forces and the 3D magnetic field readouts of the magnetic sensing IC based on our home-made automatic calibration platform of 3D force load-cell. In summary, the following benefits are expected: 1) all-in-one insole: provide three-axis force and 3D trajectory of the foot based on 9-axis IMU measurement and calculation; 2)Multi-point detection: detect multi-point force at the same time; 3)Easy calibration:(A) The production of magnet silicone gaskets is standardized, and the gaskets are standardized through high-precision molds and calibration methods.(B) Various models are pre-designed, and the models are self-adjusted when the sensor is replaced. (C) Adjust the rigidity of the magnet silicone gasket, which will be attached on the top of the magnetic field sensor, so as to be used for foot patients.

 

To learn more about this proposal, email healthylongevity@nas.edu.

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