Dragging feet is an important indicator of potential falls. We propose using a motion sensor-embedded wearable device deployed near the ankle to sense walking motions and detect dragging feet continuously. To adapt to...
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ISBN:
(纸本)9798350345025;9798350345018
Dragging feet is an important indicator of potential falls. We propose using a motion sensor-embedded wearable device deployed near the ankle to sense walking motions and detect dragging feet continuously. To adapt to the limited computation ability and power supply of the wearable device, only several most representative features are selected to build a lightweight classification model. This model can achieve high recognition accuracy while reducing computation and energy costs. Experimental results show that using only five features common to all users, the proposed method can accurately distinguish normal walking from dragging feet. The average accuracy of the four algorithms is greater than or equal to 93.0% for all five users and up to 98.7% for user 2.
This paper presents a new class of programmable embroidered pressure sensors on cloth for textile electronics leveraging interdigitated capacitor designs. Our work demonstrates the fabrication procedure for programmab...
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ISBN:
(纸本)9798350345025;9798350345018
This paper presents a new class of programmable embroidered pressure sensors on cloth for textile electronics leveraging interdigitated capacitor designs. Our work demonstrates the fabrication procedure for programmable embroidered capacitive and resistive sensors through the integration of conductive yarns into fabric substrates, thus engendering flexible pressure sensors. The experimental findings heightened sensitivity and rapid response to applied force in the developed sensors, showcasing their potential for various applications in wearable technology and smart textiles.
The design and development of low-cost intelligent sensor networks has been made possible by recent advancements in wireless communications, signal processing, and embedded systems. sensor networks have a wide range o...
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This study delves into the evolution of battery-less Radio-Frequency Identification (RFID) sensor tags, a technology that uses wireless communication for object, person, or animal identification and tracking. Recogniz...
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ISBN:
(纸本)9798350373592;9798350373608
This study delves into the evolution of battery-less Radio-Frequency Identification (RFID) sensor tags, a technology that uses wireless communication for object, person, or animal identification and tracking. Recognized for their cost effectiveness, extended useful life, and sustainability, these RFID tags are the focus due to their increasing significance. The main goal is to uncover trends and advances in battery-less RFID sensor systems, offering insights into their current status and future trajectories. The comprehensive review covers energy harvesting technologies, prevalent energy sources, participating countries, operational bands, and reading distances. The results indicate a predominant focus on the development of RFID devices without specific applications, with a notable emphasis on health and wellness applications. This study contributes valuable information on the dynamic landscape of battery-less RFID sensortechnologies, fostering potential innovations in various sectors.
This work presents a compact Complementary Dual Split Ring Resonator (CDSRR) based microstrip patch antenna for sensing application. The antenna substrate is made using 3D Printer where the substrate material is PLA (...
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ISBN:
(纸本)9798350385939;9798350385922
This work presents a compact Complementary Dual Split Ring Resonator (CDSRR) based microstrip patch antenna for sensing application. The antenna substrate is made using 3D Printer where the substrate material is PLA (Polylactic acid) of dielectric constant 3.47 and loss tangent 0.073. A novel omega shape channel is incorporated within the substrate to feed the sensing liquid to the antenna sensor. The patch and ground of the antenna is designed on a copper tape and placed on the substrate. A CDSRR slot is cut on the radiating patch of the proposed antenna to make the antenna resonates around 2.4 GHz which is a ISM band. The antenna resonates in various frequencies by the changing of microfluid inserted into the channel. In this way it senses the microfluid. The proposed design boasts a remarkably compact liquid volume requirement, yet delivers exceptional sensitivity. Following fabrication and rigorous testing of a prototype, commendable alignment is observed between the extracted data and the reference values. This outcome underscores the efficacy and reliability of the design, affirming its potential for practical implementation in diverse applications requiring precise liquid measurement and sensitivity.
In this study, the problem of designing a multi-sink clustered Wireless sensor Network (WSN) is considered. WSNs are central to the Internet of Things (IoT), and an extensive range of applications has emerged. WSN app...
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ISBN:
(纸本)9798350373981;9798350373974
In this study, the problem of designing a multi-sink clustered Wireless sensor Network (WSN) is considered. WSNs are central to the Internet of Things (IoT), and an extensive range of applications has emerged. WSN applications demand prolonged unattended operation. As sensor nodes have limited battery capacity, maximizing network lifespan is challenging. In this article, we investigate the hierarchical clustering to save energy, assigning distinct roles (master, bridge, or slave nodes) to sensors. We propose a mixed integer programming flow-based formulation with arc-sink assignment variables. In addition, a set of valid inequalities is proposed, either derived from existing literature or adapted versions. Computational experiments are conducted to evaluate the proposed approach, involving up to forty nodes and eight sinks.
Capacitive readout circuits are essential circuit blocks that convert capacitive value to a proportional voltage one. They are critical in applications like biosensing and in applications that need robust, low - cost,...
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ISBN:
(纸本)9798350384826;9798350384819
Capacitive readout circuits are essential circuit blocks that convert capacitive value to a proportional voltage one. They are critical in applications like biosensing and in applications that need robust, low - cost, integrated diagnostic technologies. This paper presents various versions of capacitive readout circuits in the application of acetone sensing whether for non-invasive diabetic screening or the detection of volatile compounds in the atmosphere. Features such input frequency, voltage, mode of actuation, and types of technology that utilize capacitive sensing are discussed as well. In addition, insights into capacitive readout circuits developed for different sensing applications have been discussed along with their circuit parameters such as resolution, sensitivity, power consumption, and voltage input.
This paper discusses the application of wireless energy transfer (WET) for powering smart sensors, addressing the challenges associated with directly utilizing solar energy in environments with difficult access. The s...
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ISBN:
(纸本)9798350373981;9798350373974
This paper discusses the application of wireless energy transfer (WET) for powering smart sensors, addressing the challenges associated with directly utilizing solar energy in environments with difficult access. The study involves a theoretical examination of wireless electricity transfer, complemented by practical implementations to illustrate key concepts. The integration of two primary aspects is emphasized throughout the research: the recovery and adaptation of solar energy, followed by its transmission without the need for a physical electrical connection. The proposed system involves the retrieval of solar energy, its subsequent adaptation for wireless transmission, reception without direct electrical contact, and the final utilization of the harvested energy to power intelligent sensors. This holistic approach aims to provide a comprehensive understanding of the wireless energy transfer process and its practical implementation in the context of smart sensorapplications.
Since their development, stretchable sensors have attracted significant interest owing to their distinctive attributes of being highly flexible and stretchable without compromising performance, as well as being lightw...
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ISBN:
(纸本)9798350383270;9798350383263
Since their development, stretchable sensors have attracted significant interest owing to their distinctive attributes of being highly flexible and stretchable without compromising performance, as well as being lightweight and adaptable to various surfaces and wearable technologies. These sensors have found widespread application in fields such as healthcare and sports, ensuring comfort for users. However, for optimal performance in these applications, a thorough characterization is crucial. In this study, a capacitive-type stretchable strain sensor based on an elastomer was characterized with the particular aim of integrating it into wearable health systems and sports clothing for human activity recognition. Thanks to a stepper motor, static and dynamic tests were conducted applying controlled stretches to the sensor, while video recording allowed the accurate extraction of the strain. A linear relationship between sensor output and stretch was observed in both conditions, while hysteresis behavior was revealed in continuous stretch analysis. Results show good performances with a stretch error introduced by the conditioning system and by the output drift in the range of 1.4%. In the end, the sensor was employed to distinguish signals between walking and different types of kicks, applying it to the knee. Motion study showed the possibility to use this sensor in human activity recognition field.
Wireless sensor Networks are predominantly used in a wide range of applications because of their efficiency in providing solutions to many complex problems. However, the wireless sensor network presents few constraint...
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