INVESTIGATION OF THE MECHANICAL TESTING CONDITIONS ON SENSING PROPERTIES OF TEXTILE-BASED STRAIN SENSOR

Year 2017, Volume: 27 Issue: 1, 3 - 9, 31.03.2017

Ozgur Atalay Asli Atalay Muhammad Dawood Husaın

Abstract

The aim of this research study is to investigate the effect of different mechanical test conditions on the sensing properties of proposed knitted strain sensors. In order to fulfill this aim, initially, the effect of quasi-static testing on the sensing properties of sensors is discussed. Thereafter, effect of the tensile testing machine cross head speed on sensor characteristics is investigated. A single design of proposed knitted strain-sensing fabric was devised using computerised flat-bed knitting technology, comprising silver coated nylon conductive yarn with 2 Ω/cm linear resistance and insulating core-spun Lycra yarns with different yarn fineness. It was observed that that sensors produced with the yarn low extension capability showed less imprecision during quasi-static tests and alteration on machine crosshead speed also affected some sensor properties such as hysteresis and linearity but no affect found on gauge factor values. Proposed knitted strain sensing structures can be used for measuring the physiological parameters of the human body, i.e., respiration rate or body articulation.

Keywords

Knitted sensor; strain sensor; knitting; test conditions; silver yarn

MEKANİK TEST KOŞULLARININ TEKSTİL BAZLI UZAMA SENSÖRLERİNİN ALGILAMA ÖZELLİKLERİNE ETKİSİNİN İNCELENMESİ ÜZERİNE BİR ARAŞTIRMA

Abstract

Bu çalışma farklı mekanik test koşullarının örme yapılı uzama sensörlerinin algılama özelliklerine etkisini incelemektedir. Bu amaç doğrultusunda öncelikle yarı statik test koşullarının sensörlerin algılama özelliklerine etkisi tartışılmıştır. Daha sonra ise çekme makinesinin üzerindeki hareketli çenenin kumaşa uyguladığı farklı çekme hızlarının sensör karakteristiklerine etkisi incelenmiştir. Örme yapılı sensörler 2 ohm/cm elektrik direniıne sahip gümüş kaplı naylon iplikleri ve farklı kalınlığa sahip elastomerik iplikler kullanılarak düz örme makinesinde üretilmiştir. Yarı statik test sonuçlarına göre; göreceli olarak daha az uzama kapasitesine sahip elastomerik ipliklerle üretilen sensörler daha az elektriksel ölçüm hatası vermiştir. Ayrıca, farklı çekme hızlarının sensörlerin histeresiz ve doğrusallık değerlerine etkisi gözlemlenirken, hassasiyet değerlerine etkisi gözlemlenmemiştir. Bu çalışmada incelenen sensörler insan fizyolojik özelliklerinin ölçülmesinde kullanılabilir.

Keywords

Örme sensörler, gümüş kaplı iplik, uzama sensörleri, mekanik test, elastomerik iplik

References

• 1. Zeng, W., et al., Fiber-Based Wearable Electronics: A Review of Materials, Fabrication, Devices, and Applications. Advanced Materials, 2014. 26(31): p.5310-5336.
• 2. Fleury, A., M. Sugar, and T. Chau, E-textiles in Clinical Rehabilitation: A Scoping Review. Electronics, 2015. 4(1): p. 173-203.
• 3. Patel, S., et al., A review of wearable sensors and systems with application in rehabilitation. Journal of neuroengineering and rehabilitation, 2012. 9(12): p.1-17.
• 4. Ferreira MS, Bierlich J, Becker M, Schuster K, Santos JL, Frazão O. Ultra-high sensitive strain sensor based on post-processed optical fiber Bragg grating. Fibers. 2014.2(2):142-9.
• 5. Husain MD, Kennon R. Preliminary Investigations into the Development of Textile Based Temperature Sensor for Healthcare Applications. Fibers. 2013.1(1):2-10.
• 6. Kirstein, T., et al., Wearable Computing Sytems - Electronic Textiles, in Wearable electronics and photonics, X. Tao, Editor. 2005, Crc Press Boca Raton, FL. p. 177-197.
• 7. Usher, M. and D. Keating, Sensors and Transducers: Characteristics, Applications, Instrumentation. Interfacing. Maxmillan, 1996.
• 8. Atalay, O., W. Kennon, and M. Husain, Textile-Based Weft Knitted Strain Sensors: Effect of Fabric Parameters on Sensor Properties. Sensors, 2013. 13(8): p. 11114-11127.
• 9. Wijesiriwardana, R., Inductive fiber-meshed strain and displacement transducers for respiratory measuring systems and motion capturing systems. Sensors Journal, IEEE, 2006. 6(3): p. 571-579.
• 10. Yang, C., et al. Textile-based capacitive sensor for a wireless wearable breath monitoring system. in Consumer Electronics (ICCE), 2014 IEEE International Conference on. 2014. IEEE.
• 11. Atalay, O. and W.R. Kennon, Knitted Strain Sensors: Impact of Design Parameters on Sensing Properties. Sensors, 2014. 14(3): p. 4712-4730.
• 12. Krajewski, A.S., et al., Piezoelectric Force Response of Novel 2D Textile Based PVDF Sensors. Sensors Journal, IEEE, 2013. 13(12): p. 4743-4748.
• 13. Husain, O.A., Richard Kennon, , Effect of Strain and Humidity on the Performance of Temperature Sensing Fabric. International Journal of Textile Science , 2013. 2(4): p. 105-112.
• 14. Chiarugi, F., et al. Measurement of heart rate and respiratory rate using a textile-based wearable device in heart failure patients. in Computers in Cardiology, 2008. 2008. IEEE.
• 15. Atalay, O., W.R. Kennon, and E. Demirok, Weft-Knitted Strain Sensor for Monitoring Respiratory Rate and Its Electro-Mechanical Modeling. Sensors Journal, IEEE, 2015. 15(1): p. 110-122.
• 16. Gilsoo, C., et al., Performance Evaluation of Textile-Based Electrodes and Motion Sensors for Smart Clothing. Sensors Journal, IEEE, 2011. 11(12): p. 3183-3193.
• 17. Holleczek, T., et al. Textile pressure sensors for sports applications. in Sensors, 2010 IEEE. 2010.
• 18. Window, A.L. and G.S. Holister, Strain gauge technology. 1982: Applied science publishers.
• 19. Wijesiriwardana, R., T. Dias, and S. Mukhopadhyay. Resistive fibre-meshed transducers. in Proceedings of the 7th IEEE International Symposium on Wearable Computers. 2003. IEEE Computer Society.
• 20. Atalay, O., et al., Comparative study of the weft-knitted strain sensors. Journal of Industrial Textiles, 2015: p. 1528083715619948.
• 21. Guo, L., L. Berglin, and H. Mattila, Improvement of electro-mechanical properties of strain sensors made of elastic-conductive hybrid yarns. Textile research journal, 2012. 82(19): p. 1937-1947.
• 22. Li, L.F. and Y.S. Ding, Design and analysis of woven structure-based flexible strain sensor. Chinese Journal of Sensors and Actuators, 2008. 21(7): p.1132-1136.
• 23. Bashir, T., et al., Stretch sensing properties of conductive knitted structures of PEDOT-coated viscose and polyester yarns. Textile Research Journal, 2014.84(3): p. 323-334.
• 24. Krucińska, I., Development of Screen-Printed Breathing Rate Sensors. FIBRES & TEXTILES in Eastern Europe, 2013. 21(6): p. 102.