Textile-Based, Interdigital, Capacitive, Soft-Strain Sensor for Wearable Applications

Atalay Ö.

MATERIALS, vol.11, no.5, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 5
  • Publication Date: 2018
  • Doi Number: 10.3390/ma11050768
  • Journal Name: MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: wearable electronics, soft strain sensors, capacitive sensors, electronic textiles, conductive fabrics, silicone elastomer, HUMAN MOTION, TEMPERATURE, PRESSURE, SKIN
  • Istanbul Technical University Affiliated: Yes


The electronic textile area has gained considerable attention due to its implementation of wearable devices, and soft sensors are the main components of these systems. In this paper, a new sensor design is presented to create stretchable, capacitance-based strain sensors for human motion tracking. This involves the use of stretchable, conductive-knit fabric within the silicone elastomer matrix, as interdigitated electrodes. While conductive fabric creates a secure conductive network for electrodes, a silicone-based matrix provides encapsulation and dimensional-stability to the structure. During the benchtop characterization, sensors show linear output, i.e., R-2 = 0.997, with high response time, i.e., 50 ms, and high resolution, i.e., 1.36%. Finally, movement of the knee joint during the different scenarios was successfully recorded.