Flexible Strain and Temperature Sensing NFC Tag for Smart Food Packaging Applications

2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)

2022

Self Cite

Smart textiles can sense different stimuli such as pressure, temperature etc., to allow users to react and adapt. Such features are accomplished through integration of various fiber-based sensors and electronic components in textile structures. Yarn is 1-dimensional structure which can be modified to behave as a sensor and can further be integrated with other sensors or electronics to form smart textile by techniques like weaving, knitting, and braiding. In this work, a flexible temperature sensor is reported by modifying a stainlesssteel yarn with V2O5 nanowires. The current profile and temperature sensing performance is measured from 5 to 50 °C. The device exhibits sensitivity of 3.7 %/°C and response time of ∼9s. The present work demonstrates the potential of using yarn as a flexible temperature sensor that can be used to realize smart textile for wearable and healthcare applications.

Section: Introductionmentioning

confidence: 99%

V₂O₅ nanowires coated yarn based temperature sensor for smart textiles

Khandelwal

2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)

2022

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“…The development of customizable, inexpensive, and massproducible smart radio frequency identification (RFID) tags or labels is in high demand as they have the power to enhance the visibility and efficiency across the supply chain in several areas ranging from health and beauty to apparel, pharmaceuticals and beyond [1][2][3][4][5]. Such smart labels could also improve the food monitoring and prevent food spoilage [6], and their battery-free identification with low-power electronics is a huge advantage [7][8][9][10]. Near field communication (NFC), the subset of highfrequency RFID, is more advanced in this battery-free sensing of the environmental parameters and provides an extra degree of freedom in safety and quality measurement.…”

Section: Introductionmentioning

confidence: 99%

Reliability Analysis of Screen-printed Tags with Low-power Electronics on Flexible Substrates

Chakraborty

Mukherjee

2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)

2022

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The additive manufacturing of RFID smart tags typically involves printing of antennas using electrically conductive materials along with the hybrid integration of the offthe-shelf low-power electronic components. In this case, the conductivity of printed material could significantly influence the reliable working of electronics as the electromagnetic performance of the antenna depends on it. In this research, we demonstrate the effect of conductive materials for printed antenna and show how their reliable operation could be attained by using suitable number of coatings. The printed antenna with its lowpower electronics circuit is also compared with the conventional copper etched rigid and flexible tags to show the challenges regarding the electromagnetic performance. The printed tags are further subjected to different bending cycles to investigate their mechanical stability under varying strain conditions.

“…Reliable and robust soft sensors in flexible and stretchable form factors are of significant interest in application such as robotics [1][2][3], the internet of things [4][5][6], healthcare [7][8][9], electronic skin (e-skin) [10][11][12][13][14][15][16], etc. These sensors are critical in these applications for accurate feedback based on reliable measurements of various stimuli of interest such as pressure, strain etc.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of stress distribution in soft sensors under torsional loading

Christou

2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)

2022

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The wearable and flexible sensors are enabling advances in next-generation technologies such as soft robotics, mobile healthcare, internet of things etc. In consequence, novel materials and manufacturing methods have received most of the attention so far. However, with the growing use of these technologies in real applications, other important areas such as mechanical reliability under repeated mechanical deformations also require greater consideration. A few studies covering this aspect have mainly focused on mechanical stress under simple bending conditions and ignored stress evolution under twisting (torsional) movements. The present work studies the influence of different parameters such as carrier substrate dimensions and its material and twisting angles on the stress distribution during torsional movements using finite element method. Following this, highly stretchable strain sensors are fabricated using nanocomposite of carbon nanotubes and Ecoflex™ and tested under various twisting angles. The soft strain sensor possesses excellent repeatable and robust torsional strain detection properties with >100% change in resistance at ±90° of twisting and has shown potential for wearable and robotics applications.