9862 – Stretchable Fiber Optic Plantar Pressure Sensor

Wearable gait monitoring technology for gait correction
  • Wearable gait monitoring technology for gait correction

Abstract

Gait abnormality affects children with autism and cerebral palsy as well as elderly citizens, and members of the public who are going through the gait rehabilitation process. Even athletes might also need posture/gait correction to improve their performance. Hence, the demand of smart shoes that can map gait pattern has created a global market of $115.3M in 2018 and is said to increase to $223.4M by 2026.Cornell’s inventors have developed a wearable gait monitoring technology that can identify changes in gait pattern based on a two-dimensional plantar-pressure mapping system made with soft and stretchable fiber optics. As the subject walks in the stance phase (parts of the feet are in contact with the ground) it creates a pressure in the insole fabric optic arrays. The plantar pressure deforms the fiber optic, which can be accelerated by another set of fiber optics on an upper or lower layer creating dents at the intersection. The deformation of the optical fibers decrease the intensity of the infrared ray traveling through the fibers. The conventional products based on soft conductive material of ink between two polymer films have issues in the repeatability, reliability, and user comfort. When the data was compared to the F-Scan system from Tekscan Inc., it was found that the current fiber optic was sensitive to the pressing event in every location throughout the foot, as well as the magnitude of the signal change corresponds to the reference data. The entire ensemble of the fiber optic plantar is a detachable unit for the benefit of the user

Website

https://cornell.flintbox.com/technologies/F20C6DA5C0E44BF6B638C46092D2FB1B

Advantages

• Relatively cheaper, more comfortable, and reliable compared to existing products in the market (Tekscan Inc., Boston MA and novel, Germany).

• No need for constant physician supervision for gait correction.

• No use of big data transmitter to act as data collector. The data can be tracked using Bluetooth.

• The fiber optic can be applied in ambient temperature and pressure conditions and is lightweight, breathable, chemically stable, thin, stretchable, and flexible.

• Immune to most of the electromagnetic spectrum

Potential Applications

  • Diagnosis of gait abnormality.

Contact Information

Name: Ryan Luebke

Email: rtl77@cornell.edu

Phone: 607-254-4483