Passive UHF RFID tag consists of a microchip attached directly to an antenna. Proper impedance match between the antenna and chip is crucial in design. It influences system performance characteristics such as range tag. known that nonlinear load whose complex each state varies with frequency input power. This paper illustrates proper calculation power reflection coefficient for maximum transfer by taking into account changing versus frequency.

Purpose The purpose of this paper is to develop a wireless strain sensor for measuring large strains. based on passive ultra high‐frequency radio frequency identification (RFID) technology and it can be embedded into variety structures. Design/methodology/approach Silver ink conductors RFID tags were printed by the screen printing method stretchable polyvinyl chloride fabric substrates. development strain‐sensitive tag was behavior selected antenna substrate materials. Performance effect...

In this study, the effect of conductive ink layer thickness on performance printed ultra-high-frequency (UHF) radio-frequency identification (RFID) tag antennas was investigated. A simple quarter wave dipole for European UHF RFID frequencies designed to be tested in study. All tags were made by using screen-printing technique. Three different thicknesses used. Performance analyzed measurement threshold and backscatter power. The results show that it is possible produce screen printing...

(Radio frequency identification) RFID tags integrated into clothing enable monitoring of people without their conscious effort. This requires to be an unnoticeable part and comfortable wear. In this study, antennas were screen printed on two different fabrics, six coating materials for the (integrated circuits) ICs applied, reliability these was tested with moisture laundry tests. Generally, glue-type easier handle could spread precisely. All operational immediately after coatings five seen...

Future welfare and healthcare applications require wearable radio-frequency identification (RFID) tags where the tag antenna is an integral part of clothing endures repeated stretching. In this study, passive ultra-high-frequency (UHF) RFID antennas were fabricated from silver-plated stretchable fabric by screen printing them on non-conductive, fabric. The reliability was studied stretching repeatedly initial length 10 cm to 13.5 cm, up 200 cycles. According our results, electro-textile...

The integrated functionalities of smart furniture can support both caregivers and their clients, improving safety, comfort, efficiency. This article describes three prototypes which have been co-developed earlier with end users, studies potential benefits as well further development needs (second iteration) by an online survey. In this iteration round the aim was to involve healthcare professionals, new users from different countries. total 21 professionals 19 end-users six European...

In this study, polymeric silver inks, paper substrates, and screen printing were used to produce prototype Bow-Tie tags. Because of increasing interest in applying passive UHF-RFID systems industry, the antenna study was designed work through paper. The maximum reliable read ranges tags measured thorough stacked also air. analysis functioning design are discussed. All inks substrates suitable as material tag antennas had good reading performance. quite same for copper aluminum studied...

In passive Radio Frequency Identification (RFID), transponders or tags are used to label objects be identified. this study tag antennas were produced using etching, screen-printing, and gravure printing methods. The threshold backscattered signal strengths of the measured determine effect different manufacturing methods on tags' performance. Conductivity, skin depth, thickness, quality conducting layer have a major Each method sets its own boundary conditions processibility high conduction...

Strain measurements could be utilized in monitoring human bodily functions and movements. Cost effective low maintenance wearable sensors are needed this field. The goal of paper was to produce strain based on UHF RFID technology the behavior materials which were prototypes. Two tag geometries compared. Polymer thick film silver ink used as conductive medium. tags fabricated by screen printing stretchable PVC fabric substrates. Performance effect mechanical straining functioning examined....

Cognitive self-rehabilitation lacks updated means and tools. This paper provides a synopsis of novel cognitive recreation game tools, an analysis their user feedback, as well potential new ideas for developers. The purpose this study was to evaluate the attitudes experiences Chinese elderly people on mobile memory rehabilitation games originally developed in Finland, Europe. Mobile that require skills were tested with test group care home. User feedback collected by interviews observations...

Novel interactive solutions provide new possibilities for designing appealing game experiences wider demographics. The development of motion-based controllers has facilitated the advance an exergame genre that involves physical activity as means interacting with a game. Furthermore, major reason increased interest in exergaming is concern over high levels obesity Western society. This paper summarizes results four small-scale studies order to distinguish design principles facilitate low-tech...

Purpose – Cognitive self-rehabilitation lacks updated means and tools. The purpose of this paper is to evaluate the effect cognitively simulating mobile games on cognitive skills recreation older people with memory impairment. Design/methodology/approach Mobile that require were developed. tested by memory-impaired adults, average age 90. Gaming interventions took place for three months a daily basis. Game outcomes automatically recorded user feedback was collected interviews. progress...

In this study copper and silver ink microstrip lines (MSLs) are simulated, measured compared. Implementation performance of a coupled-line coupler using printed MSLs was investigated. At microwave frequencies it is important to consider conductor losses, especially in thin conducting structures. The effect the conductivity material, substrate losses protective coating were also results showed that despite lower compared copper, screen-printed authors studied still applicable applications.

This article is an interesting substrate material for environmental-friendly printable electronics. In this study, screen-printed RFID tags on paper are examined. Their reliability was tested with low temperature, high slow temperature cycling, and humidity water dipping test. Environmental stresses affect the tag antenna impedance, losses radiation characteristics due to their impact ink film substrate. Low cycling did not have a radical effect measured parameters: threshold power,...

We present a passive ultra-high frequency (UHF) radiofrequency identification (RFID)-based strain sensor, which is designed for simple and efficient body movement monitoring. This RFID platform fabricated from electro-textile materials can thus be seamlessly integrated into our everyday clothing. The sensor has an reference tag, in order to avoid the effects of reflections or external disturbances on tag performance. prototype on-body read range 1 meter normal office environment with...

Moisture measurements of the body can be used for healthcare purposes as well helping in exercising. In this paper, suitability passive UHF RFID technology moisture sensing is investigated. The has a great potential wearable, comfortable, and wireless systems, although it not originally purposes. our study, tag antenna outlines are embroidered on fabric substrate, ICs attached by embroidery or with conductive glue, performance sensor evaluated measurements. All tags attained peak read ranges...

Sweat rate measurements can be used for healthcare purposes as well helping in exercising. In this paper, the suitability of passive UHF (ultra high frequency) RFID (radiofrequency identification) technology sweat sensing is investigated. The has a great potential wearable, comfortable, and wireless systems, although it not originally purposes. Two types textile tag prototypes are presented, their performance evaluated by measurements, prospects concerns these discussed paper. achieved...

Childhood obesity and physical inactivity are well-known problems which typically related with videogames. The goal of this study is to develop digital games motivate children adolescents exercise more, instead. realized in such way that no special game consoles required. can be played a regular computer while mobile phones heart rate monitors used as the controllers. Thus also from public screen schools, for example, thus offering new exercising possibilities among youngsters. In study, two...

Abstract A strain sensor tag with screen printed antenna for seamless integration clothing is examined to provide a wireless method monitoring of human body movements. The response the investigated in air and on body. While results indicate strong antenna-body interaction, found be monotonic function strain.

Abstract This paper presents the Design for Somebody (DfS) philosophy targeted to iterative, user‐oriented development of solutions special user groups. In this article, DfS is discussed using a game context. The gives concrete examples how can be used in developing motivating serious games. three games which adjusted according user's abilities. aim generate personalized means enable and motivate physical, cognitive social skill development. process described order clarify approach features...