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Flexible Pressure Sensors for Integration into Karate Body Protector.

Derya Tama Birkocak1,2, Pedro Gomes3, Helder Carvalho3

  • 12C2T-Centre for Textile Science and Technology, University of Minho, 4800-058 Guimarães, Portugal.

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Summary

Researchers developed smart karate body protectors using textile-based pressure sensors. These sensors can detect and quantify punches, aiding in injury prevention, skill improvement, and accurate scoring in karate.

Keywords:
karate sportpiezoresistive pressure sensorssmart body protectortextile sensors

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Area of Science:

  • Sports Engineering
  • Textile Science
  • Biomedical Engineering

Background:

  • Karate's growing popularity necessitates technological integration for safety and performance.
  • Smart protective gear is underdeveloped in karate compared to other martial arts like taekwondo.
  • There's a need for unobtrusive sensors to monitor karate techniques and scoring.

Purpose of the Study:

  • To develop piezoresistive, textile-based pressure sensors for karate body protectors.
  • To integrate these sensors for injury prevention, skill enhancement, and scoring.
  • To characterize sensor performance under various conditions and real-world application.

Main Methods:

  • Fabrication of small-scale piezoresistive sensors using ultrasonic welding, hot press welding, and oven curing.
  • Characterization using universal testing machines, specialized hardware, and custom software.
  • Manufacturing and cyclic testing of large-scale sensors for integration into body protectors.

Main Results:

  • Stable sensor signals with an output up to 0.03 V/N were achieved.
  • Sensor transfer functions exhibited expected hysteresis and nonlinearity, but with compensation potential.
  • Real-world tests demonstrated the ability to detect and quantify light punches accurately.

Conclusions:

  • Piezoresistive textile-based pressure sensors are viable for smart karate applications.
  • The developed sensors offer a practical solution for performance monitoring and score calculation.
  • This technology can enhance the safety and competitive aspects of karate training and competition.