816 research outputs found

    Wireless body sensor networks for health-monitoring applications

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    This is an author-created, un-copyedited version of an article accepted for publication in Physiological Measurement. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0967-3334/29/11/R01

    Analysis of Wireless Body-Centric Medical Sensors for Remote Healthcare

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    Aquesta tesi aborda el problema de trobar solucions confortables, de baixa potĂšncia i sense fils per aplicacions mĂšdiques. La tesi tracta els avantatges i les limitacions de tres tecnologies de comunicaciĂł diferents per la mesura de parĂ metres del cos i mĂštodes per redissenyar sensors per avaluacions ĂČptimes centrades en el cos. La tecnologia RFID es considera una de les solucions mĂ©s influents per superar el problema del consum d'energia limitat, a causa de la presĂšncia de molts sensors connectats. TambĂ© s'ha estudiat la tecnologia Bluetooth de baixa energia per resoldre els problemes de seguretat i la distĂ ncia de lectura que, en general, representen el coll d'ampolla de RFID pels sensors de cos. Els dispositius analĂČgics poden reduir drĂ sticament les necessitats d'energia a causa dels sensors i les comunicacions, considerant pocs elements i un mĂštode de transmissiĂł simple. S'estudia un mĂštode de comunicaciĂł completament passiu, basat en FSS, que permet una distĂ ncia de lectura raonable amb capacitats de detecciĂł precises i confiables, que s'ha discutit en aquesta tesi. L'objectiu d'aquesta tesi Ă©s investigar mĂșltiples tecnologies sense fils per dispositius portĂ tils per identificar solucions adequades per aplicacions particulars en el camp mĂšdic. El primer objectiu Ă©s demostrar la facilitat d'Ășs de les tecnologies econĂČmiques sense bateria com un indicador Ăștil de parĂ metres fisiopatolĂČgics mitjançant la investigaciĂł de les propietats de les etiquetes RFID. A mĂ©s a mĂ©s, s'ha abordat un aspecte mĂ©s complex respecte a l'Ășs de petits components passius com sensors sense fils per trastorns del son. Per Ășltim, un altre objectiu de la tesi Ă©s el desenvolupament d'un sistema completament autĂČnom que utilitzi tecnologia BLE per obtenir propietats avançades mantenint baix tant el consum com el preuEsta tesis aborda el problema de encontrar soluciones confortables, inalĂĄmbricas y de baja potencia para aplicaciones mĂ©dicas. La tesis discute las ventajas y limitaciones de tres tecnologĂ­as de comunicaciĂłn diferentes para la mediciĂłn en el cuerpo y los mĂ©todos para elegir y remodelar los sensores para evaluaciones Ăłptimas centradas en el cuerpo. La tecnologĂ­a RFID se considera una de las soluciones mĂĄs influyentes para superar el consumo de energĂ­a limitado debido a la presencia de muchos sensores conectados. AdemĂĄs, la baja energĂ­a de Bluetooth se ha estudiado se ha estudiado la tecnologia Bluetooth de baja energia para resolver los problemas de seguridad y la distancia de lectura que, en general, representan el cuello de botella de la RFID para los sensores de cuerpo. Los dispositivos analĂłgicos pueden reducir drĂĄsticamente las necesidades de energĂ­a debido a los sensores y las comunicaciones, considerando pocos elementos y un mĂ©todo de transmisiĂłn simple. Se estudia un mĂ©todo de comunicaciĂłn completamente pasivo, basado en FSS, que permite una distancia de lectura razonable con capacidades de detecciĂłn precisas y confiables, que se ha discutido en esta tesis. El objetivo de esta tesis es investigar mĂșltiples tecnologĂ­as inalĂĄmbricas para dispositivos portĂĄtiles para identificar soluciones adecuadas para aplicaciones particulares en campos mĂ©dicos. El primer objetivo es demostrar la facilidad de uso de las tecnologĂ­as econĂłmicas sin baterĂ­a como un indicador Ăștil de dichos parĂĄmetros fisiopatolĂłgicos mediante la investigaciĂłn de las propiedades de las etiquetas RFID. AdemĂĄs, se ha abordado un aspecto mĂĄs complejo con respecto al uso de pequeños componentes pasivos como sensores inalĂĄmbricos para enfermedades del sueño. Por Ășltimo, un resultado de la tesis es desarrollar un sistema completamente autĂłnomo que utilice la tecnologĂ­a BLE para obtener propiedades avanzadas que mantengan la baja potencia y un precio bajo.This thesis addresses the problem of comfortable, low powered and, wireless solutions for specific body-worn sensing. The thesis discusses advantages and limitations of three different communication technologies for on body measurement and investigate methods to reshape sensors for optimum body-centric assessments. The RFID technology is considered one of the most influential solutions to overcome the limitated power consumption due to the presence of many sensors connected. Further, the Bluetooth low energy has been studied to solve security problems and reading distance that overall represent the bottleneck of the RFID for the body-worn sensors. Analog devices can drastically reduce the energy needs due to the sensors and the communications, considering few elements and a simple transmitting method. An entirely passive communication method, based on FSS is studied, enabling a reasonable reading distance with precise and reliable sensing capabilities, which has been discussed in this thesis. The objective of this thesis is to investigate multiple wireless technologies for wearable devices to identify suitable solutions for particular applications in medical fields. The first objective is to demonstrate the usability of the inexpensive battery-less technologies as a useful indicator of such a physio-pathological parameters by investigating the properties of the RFID tags. Furthermore, a more complex aspect regards the use of small passive components as wireless sensors for sleep diseases has been addressed. Lastly, an outcome of the thesis is to develop an entirely autonomous system using the BLE technology to obtain advanced properties keeping low power and a low price

    A review of recent innovations in remote health monitoring

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    The development of remote health monitoring systems has focused on enhancing healthcare services’ efficiency and quality, particularly in chronic disease management and elderly care. These systems employ a range of sensors and wearable devices to track patients’ health status and offer real-time feedback to healthcare providers. This facilitates prompt interventions and reduces hospitalization rates. The aim of this study is to explore the latest developments in the realm of remote health monitoring systems. In this paper, we explore a wide range of domains, spanning antenna designs, small implantable antennas, on-body wearable solutions, and adaptable detection and imaging systems. Our research also delves into the methodological approaches used in monitoring systems, including the analysis of channel characteristics, advancements in wireless capsule endoscopy, and insightful investigations into sensing and imaging techniques. These advancements hold the potential to improve the accuracy and efficiency of monitoring, ultimately contributing to enhanced health outcomes for patients.Publisher's VersionQ2WOS:001130630400001PMID:3813832

    Wearable flexible lightweight modular RFID tag with integrated energy harvester

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    A novel wearable radio frequency identification (RFID) tag with sensing, processing, and decision-taking capability is presented for operation in the 2.45-GHz RFID superhigh frequency (SHF) band. The tag is powered by an integrated light harvester, with a flexible battery serving as an energy buffer. The proposed active tag features excellent wearability, very high read range, enhanced functionality, flexible interfacing with diverse low-power sensors, and extended system autonomy through an innovative holistic microwave system design paradigm that takes antenna design into consideration from the very early stages. Specifically, a dedicated textile shorted circular patch antenna with monopolar radiation pattern is designed and optimized for highly efficient and stable operation within the frequency band of operation. In this process, the textile antenna's functionality is augmented by reusing its surface as an integration platform for light-energy-harvesting, sensing, processing, and transceiver hardware, without sacrificing antenna performance or the wearer's comfort. The RFID tag is validated by measuring its stand-alone and on-body characteristics in free-space conditions. Moreover, measurements in a real-world scenario demonstrate an indoor read range up to 23 m in nonline-of-sight indoor propagation conditions, enabling interrogation by a reader situated in another room. In addition, the RFID platform only consumes 168.3 mu W, when sensing and processing are performed every 60 s

    Microwave Devices for Wearable Sensors and IoT

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    The Internet of Things (IoT) paradigm is currently highly demanded in multiple scenarios and in particular plays an important role in solving medical-related challenges. RF and microwave technologies, coupled with wireless energy transfer, are interesting candidates because of their inherent contactless spectrometric capabilities and for the wireless transmission of sensing data. This article reviews some recent achievements in the field of wearable sensors, highlighting the benefits that these solutions introduce in operative contexts, such as indoor localization and microwave sensing. Wireless power transfer is an essential requirement to be fulfilled to allow these sensors to be not only wearable but also compact and lightweight while avoiding bulky batteries. Flexible materials and 3D printing polymers, as well as daily garments, are widely exploited within the presented solutions, allowing comfort and wearability without renouncing the robustness and reliability of the built-in wearable sensor

    Analysis of a compact multi-band textile antenna for WBAN and WLAN applications

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    A dual-band wearable antenna is designed on a textile material. The design operates at ISM bands available for Wireless Body Area Network (WBAN) and Wireless Local Area Network (WLAN) with an input match better than -15 dB. The antenna is designed by using Computational Electromagnetic Software (CEMS) based on Finite-Difference Time-Domain (FDTD) method. A three-layer phantom model including skin, fat and muscle has been considered to compute the specific absorption rate (SAR). The maximum value of SAR averaged over 1g and 10g of tissue is less than 1.6 W/Kg and 2 W/Kg, respectively, when the maximum incident power of the antenna is 63 mW. These values are incompliance with the international electromagnetic safety standards

    Electrically Small Antenna For RFID-based Implantable Medical Sensor

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    Wearable Textile Antennas with High Body-Antenna Isolation: Design, Fabrication, and Characterization Aspects

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    This chapter provides a brief overview of the types of wearable antennas with high body-antenna isolation. The main parameters and characteristics of wearable antennas and their design requirements are discussed. Next, procedures (passive and active) to test the performance of wearable antennas are presented. The electromagnetic properties of the commercially available textiles used as antenna substrates are investigated and summarized here, followed by a more detailed examination of their effects on the performance of wearable antennas with high body-antenna isolation. A trade-off between substrate electromagnetic properties and resonant frequency, bandwidth, radiation efficiency, and maximum gain is presented. Finally, a case study is presented with detailed analyses and investigations of the low-profile all-textile wearable antennas with high body-antenna isolation and low SAR. Their interaction with a semisolid homogeneous human body phantom is discussed. The simulations and experimental results from different (in free-space and on-body) scenarios are presented

    Integration of electronic systems on wearable textile antenna platforms

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