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A Novel Textile Stitch-Based Strain Sensor for Wearable End Users
Orathai Tangsirinaruenart1, George Stylios2
1Research Institute for Flexible Materials, Heriot Watt University, Edinburgh EH14 4AS, UK. ot32@hw.ac.uk.
Materials (Basel, Switzerland)
|May 10, 2019
Summary
This study developed novel textile strain sensors using conductive threads and various stitch structures. Stitch 304 2-ply demonstrated optimal performance for wearable physiological monitoring applications.
Area of Science:
- Materials Science
- Textile Engineering
- Wearable Technology
Background:
- Textile-based sensors are crucial for wearable technology.
- Developing reliable and sensitive strain sensors is an ongoing challenge.
Purpose of the Study:
- To investigate novel textile-based strain sensors.
- To evaluate the performance of different sensor configurations.
Main Methods:
- Measured electrical resistance and mechanical properties of seven textile sensors.
- Utilized conductive threads (silver-plated nylon) in various stitch structures on knit fabric substrates with spandex.
- Analyzed the effects of elongation on resistance, sensitivity, repeatability, and hysteresis.
Main Results:
- Stitch 304 2-ply exhibited the most suitable performance for strain movement.
- Achieved a wide working range (>50%), high linearity (R²=0.984), low hysteresis (6.25% ΔR), good gauge factor (1.61), and excellent repeatability (drift R²=-0.0073).
- Negligible drift in electrical resistance was observed across different stitch structures.
Conclusions:
- The developed stitch-based sensor shows significant potential for wearable applications.
- Ideal for physiological wellbeing monitoring, including body movement and heart monitoring.
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