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Artykuły w czasopismach na temat "Wireless technology - Acoustic"
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Hur, Sunghoon, Hyun Soo Kim i Hyun-Cheol Song. "Ultrasound Mediated Wireless Power Transfer Technology". Ceramist 24, nr 3 (30.09.2021): 314–26. http://dx.doi.org/10.31613/ceramist.2021.24.3.05.
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Wireless energy transfer (WET) is the transmission of electric power without any physical connections such as wires. Currently, inductive coupling mediated by electromagnetic (EM) waves is the most common method of WET and is widely used to charge portable devices such as smartphones, Bluetooth earphones, electric shavers, and visual prostheses. However, its application is still limited due to a number of issues including low efficiency, short charging distance, heating problem, and limited choice of transmission medium. Due to these issues, EM-based WET cannot be applied to implantable medical devices, marine cable operation sensors, and electronic devices with electromagnetic interference shielding. Recently, as an alternative to EM-based WET, acoustic energy transfer mediated by sound waves becomes more attractive. Ultrasound offers advantages for transmission in dense media such as liquids or solids and is regardless of electromagnetic shielding. In this review, we investigate recent progress in acoustic power transfer technology in terms of acoustic energy conversion mechanism and provide the future research direction of acoustic power transfer technology.
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Pan, Yong, Qin Molin, Tengxiao Guo, Lin Zhang, Bingqing Cao, Junchao Yang, Wen Wang i Xufeng Xue. "Wireless passive surface acoustic wave (SAW) technology in gas sensing". Sensor Review 41, nr 2 (22.03.2021): 135–43. http://dx.doi.org/10.1108/sr-03-2020-0061.
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Purpose This paper aims to give an overview about the state of wireless passive surface acoustic wave (SAW) gas sensor used in the detection of chemical vapor. It also discusses a variety of different architectures including delay line and array sensor for gas detection, and it is considered that this technology has a good application prospect. Design/methodology/approach The authors state the most of the wireless passive SAW methods used in gas sensing, such as CO2, CO, CH4, C2H4, NH3, NO2, et al., the sensor principles, design procedures and technological issues are discussed in detail; their advantages and disadvantages are also summarized. In conclusion, it gives a prospect of wireless passive SAW sensor applications and proposes the future research field might lie in the studying of many kinds of harmful gases. Findings In this paper, the authors will try to cover most of the important methods used in gas sensing and their recent developments. Although wireless passive SAW sensors have been used successfully in harsh environments for the monitoring of temperature or pressure, the using in chemical gases are seldom reported. This review paper gives a survey of the present state of wireless passive SAW sensor in gas detection and suggests new and exciting perspectives of wireless passive SAW gas sensor technology. Research limitations/implications The authors will review most of the methods used in wireless passive SAW sensor and discuss the current research status and development trend; the potential application in future is also forecasted. Originality/value The authors will review most of the methods used in wireless passive SAW sensor and discuss the current research status and development trend; the potential application in future is also forecasted.
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Schaechtle, Thomas, Taimur Aftab, Leonhard M. Reindl i Stefan J. Rupitsch. "Wireless Passive Sensor Technology through Electrically Conductive Media over an Acoustic Channel". Sensors 23, nr 4 (11.02.2023): 2043. http://dx.doi.org/10.3390/s23042043.
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Hydrogen-based technologies provide a potential route to more climate-friendly mobility in the automotive and aviation industries. High-pressure tanks consisting of carbon-fiber-reinforced polymers (CFRPs) are exploited for the storage of compressed hydrogen and have to be monitored for safe and long-term operation. Since neither wired sensors nor wireless radio technology can be used inside these tanks, acoustic communication through the hull of the tank has been the subject of research in recent years. In this paper, we present for the first time a passive wireless sensor technology exploiting an ultrasonic communication channel through an electrically conductive transmission medium with an analog resonant sensor featuring a high quality factor. The instrumentation system comprised a readout unit outside and a passive sensor node inside the tank, coupled with geometrically opposing electromechanical transducers. The readout unit wirelessly excited a resonant sensor, whose temperature-dependent resonance frequency was extracted from the backscattered signal. This paper provides a description of the underlying passive sensor technology and characterizes the electric impedances and acoustic transmission as an electrical 2-Port to design a functional measurement setup. We demonstrated a wireless temperature measurement through a 10 mm CFRP plate in its full operable temperature range from −40 to 110 °C with a resolution of less than 1 mK.
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Okumura, Ryota, Hiroyuki Fukumoto, Yosuke Fujino, Seiji Ohmori i Yuya Ito. "Underwater Acoustic Communication Technology for Wireless Remotely Operated Vehicles". NTT Technical Review 21, nr 8 (sierpień 2023): 16–22. http://dx.doi.org/10.53829/ntr202308fa1.
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Majeed, Ishrat, i Er Jasdeep Singh. "Design and Performance Analysis of Underwater Acoustic Sensor Networks". International Journal for Research in Applied Science and Engineering Technology 10, nr 3 (31.03.2022): 294–303. http://dx.doi.org/10.22214/ijraset.2022.40599.
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Abstract: The underwater acoustic sensor network (UASN) is essential for exploration missions and observation in demanding environments. The UASN'S connection route is acoustic waves, which limits its usefulness in comparison to ground sensor networks. This is the case because to its limited capacity, latency, and significant route loss. This article provides comprehensive research of the characteristics of UASN. We explore the functionality of underwater acoustic ad-hoc networks in the presence of disruptions. RF signals are used as a communication mechanism in wireless sensor networks, both terrestrial and aerial. However, in a sub-sea setting, such as deep-sea research, detecting and transmitting data needs a completely different method to underwater communication. The fact that the seas cover 70% of the earth's surface and contain massive amounts of unexplored riches cannot be ignored. The aquatic environment has largely escaped the effects of recent breakthroughs in wireless sensor networks (WSNS) and their broad application in latest studies and economic progress. Research on underwater acoustic sensor networks (UASNS) is developing at a snail's pace due to the difficulties in transferring most of the state-of-the-art of land and air based WSNS to its aquatic equivalent. The bulk of underwater activities rely on acoustic communication and specialized sensors that can endure the harsh environment of the oceans. The purpose of this study is to investigate how UASN works in different situations. End-to-end latency and energy consumption are examined in response to a variety of factors. We also investigate how well underwater acoustic ad-hoc networks perform when nodes are dispersed, and the network is large. Keywords: Under water Acoustics, Sensor, Wireless Sensor Networks, Energy Consumptions.
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Joshi, P. K., K. R. Latwe i M. A. Hasamnis. "Analysis and Enhancement of Q-Factor in Thin-Film Bulk Acoustic Wave Resonator (FBAR)". Journal of Physics: Conference Series 2273, nr 1 (1.05.2022): 012010. http://dx.doi.org/10.1088/1742-6596/2273/1/012010.
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Abstract In MEMS technology, MEMS Resonators has shown high potential applications in wireless communications such as Bluetooth and WIFI range. The Bulk Acoustic Wave (BAW) Resonator is a device which has more potential to meet the needs of today’s wireless technology. The Acoustic wave technology has attracted more attention and it’s an effective solution for achieving high-performance RF filters applications due to its low cost and small size of the device. The performance analysis of thin film bulk acoustic resonator (FBAR) by varying different piezoelectric material, piezoelectric material’s thickness and electrode materials is demonstrated in this paper. It is understood that the Quality factor is considerable higher for AlN as compared to ZnO and LiNbO3. Among all the materials, Aluminium electrode achieved maximum quality factor. As the thickness of piezo material decreases, it is found that the resonant frequency and Quality factor increases. Along with the Quality Factor, the top and bottom electrode thickness has a significant impact on the resonant frequency.
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Zhu, Yun Hang, i Zhi Hui Deng. "The Application of RAKE Receiving Technology in the Underwater SS Communication". Applied Mechanics and Materials 513-517 (luty 2014): 4248–52. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.4248.
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In recent years, the strategic significance of the oceans is growing as well as its research and development needs. The underwater wireless communication is becoming more and more important. The underwater acoustic communication is one of the few mediums which can conduct the underwater transmission over a long distance, and the multipath effect is the major obstacle of affecting the systems high speed and high reliability. The characteristics of underwater acoustic fading and coherent multi-path channel are studied, and the model of underwater acoustic spreading spectrum (SS) communication system is established. The affect of coding technique on the systems performance are analyzed in detail. The improved RAKE receiving technical solution is put forward, whose simulation analysis and data in different combining ways are given. It is proved that the scheme can better solve the problem of multipath interference in underwater acoustic transmission.
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Soderi, S. "Acoustic-Based Security: A Key Enabling Technology for Wireless Sensor Networks". International Journal of Wireless Information Networks 27, nr 1 (13.11.2019): 45–59. http://dx.doi.org/10.1007/s10776-019-00473-4.
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He, Jun, Jie Li, Xiaowu Zhu, Shangkun Xiong i Fangjiong Chen. "Design and Analysis of an Optical–Acoustic Cooperative Communication System for an Underwater Remote-Operated Vehicle". Applied Sciences 12, nr 11 (30.05.2022): 5533. http://dx.doi.org/10.3390/app12115533.
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Underwater wireless communication technology plays a key role in the field of marine equipment technology. In this paper, we experimentally demonstrate an underwater optical–acoustic cooperative communication platform for an underwater wireless data transmission system. The system utilizes an underwater Remote-Operated Vehicle (ROV) as a carrier, equipped with LEDbased optical communication and acoustic communication modems. In particular, the system applies optical communication to transmit large-scale data and applies acoustic communication to provide acoustic-assisted signaling exchange before optical transmission and Automatic Repeat Request (ARQ) during optical transmission. By experimentally measuring the transmission distance under different water quality conditions, we found that the system can achieve a data rate of up to 5 Mb/s over a laboratory underwater channel of 7.6 m. By comparing the attenuation coefficients for the outdoor underwater environment with that in clear seawater, we estimate that the achievable link distance in clear seawater can reach 11 m with a data rate of 3.125 MB/s. The proposed system takes both implementation complexity and cost into consideration and also provides significant guidance for future real-time high-speed underwater optical–acoustic communications.
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Pita, Antonio, Francisco J. Rodriguez i Juan M. Navarro. "Analysis and Evaluation of Clustering Techniques Applied to Wireless Acoustics Sensor Network Data". Applied Sciences 12, nr 17 (26.08.2022): 8550. http://dx.doi.org/10.3390/app12178550.
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Exposure to environmental noise is related to negative health effects. To prevent it, the city councils develop noise maps and action plans to identify, quantify, and decrease noise pollution. Smart cities are deploying wireless acoustic sensor networks that continuously gather the sound pressure level from many locations using acoustics nodes. These nodes provide very relevant updated information, both temporally and spatially, over the acoustic zones of the city. In this paper, the performance of several data clustering techniques is evaluated for discovering and analyzing different behavior patterns of the sound pressure level. A comparison of clustering techniques is carried out using noise data from two large cities, considering isolated and federated data. Experiments support that Hierarchical Agglomeration Clustering and K-means are the algorithms more appropriate to fit acoustics sound pressure level data.
Rozprawy doktorskie na temat "Wireless technology - Acoustic"
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Gruetzmann, Anna [Verfasser]. "Wireless ECG Sensor in Surface Acoustic Wave Transponder Technology / Anna Gruetzmann". München : Verlag Dr. Hut, 2010. http://d-nb.info/1009484524/34.
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Karlsson, Marika. "Smart inventory using acoustic and radio communications". Thesis, Uppsala universitet, Signaler och System, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388501.
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The world is getting connected in both small and bigger systems. Internet of Things (IoT) has flourished the past years and we no longer just connect our computers and phones but also our cars, wallets, keys and even the furniture and lighting in homes are talking. It is time to take things one step further, give your food and supplies a voice. This master thesis has the purpose to construct a smart inventory using the IoT. Its outcome is a prototype that consists of three main parts: 1) a number of sensor nodes to measure what products are left, 2) a hub to collect the inventory from the sensor nodes through acoustic communication and store it, and 3) an app on a mobile device to receive the inventory from a hub via Bluetooth and display it in a list for the user. The acoustic communication between the sensor node and the hub are thoroughly investigated taking into account the distance and angle as well as reliability. The Bluetooth communication between the hub and the mobile device with the app can be established automatically when the app is opened or when the user requests an update. The finished prototype has been tested and its performance evaluated. The results show that it functions with great satisfaction, being capable of measuring inventory, storing it and display it on the app. The sensor node and hub have highly reliable communicate within the distance of 1.9 m, a horizontal angle of 25 degrees and a vertical angle of 30 degrees. When the system is exposed to a lot of disturbance it has a reliability of 66% and the Bluetooth connection between the hub and the app can automatically connect about 70% of the times. This smart inventory system can be used in homes, storage rooms, offices, workshops and stores without Internet connection so that no one outside of Bluetooth coverage can get the information, or be expand with Internet connection so that the inventory can be updated anywhere and anytime around the world.
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Sagnard, Marianne. "Conception et développement de composants à ondes élastiques de surface, dédiés à la détection passive et sans fil de grandeurs physiques et au filtrage radiofréquences à bandes multiples". Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCD051.
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Les travaux décrits dans ce mémoire ont pour but de conduire à la réalisation de capteurs et de filtres à ondes élastiques de surface (SAW) innovants, passifs et sans fil, dédiés à une utilisation en environnement sévère. Différentes structures de composants SAW sont alors étudiées. Les caractéristiques générales, telles que les pertes d’insertion ou les bandes passantes relatives atteignables, des structures usuelles (résonateurs, lignes à retard, LCRF, filtres en échelle…) sont connues de l’homme de l’art. Cependant, pour concevoir un dispositif SAW qui respecte les critères d’un cahier des charges donné, il est impératif de définir le comportement spécifique de chaque dispositif avant son envoi en production.Pour ce faire, des modèles numériques sont développés, qui incluent à la fois la possibilité d’analyser le comportement de systèmes à la géométrie complexe (filtres en échelles, transducteurs apodisés) et qui prennent en compte la présence de phénomènes perturbateurs (modes transverses, pertes liées à la nature des matériaux). La comparaison entre les calculs numériques et les mesures a mis en avant l’adéquation des résultats expérimentaux et de calculs.La mise en place de ces outils permet le développement de capteurs et filtres SAW innovants grâce à une analyse numérique rapide et fiable de leur comportement.Ainsi, l’étude de résonateurs et capteurs dédiés à une utilisation à des températures excédant les 700°C est menée. Il est démontré qu’en dépit de son inhomogénéité, le Ba2TiSi2O8 est un matériau adapté à la réalisation de SAW soumis à des températures élevées pour des fréquences de l’ordre de 300 MHz jusqu’au GHz.Par ailleurs, une structure disposant d’un transducteur à trois doigts par longueur d’ondes est utilisée dans le but de réaliser des résonateurs insensibles aux effets de la directivité lorsque la température évolue. Cette même configuration a mis en exergue la possibilité de réaliser des capteurs n’utilisant qu’un seul résonateur (contre au moins deux jusqu’à présent). Ce dernier point permet de limiter l’encombrement des composants et résout la problématique du vieillissement différentiel des structures.Un second type de capteurs, passifs et sans fil, fondés sur l’utilisation d’un seul SAW et dédiés à la mesure d’hygrométrie, a été étudié. Dans cette nouvelle configuration, un SAW de type LCRF est utilisé comme transpondeur et la zone sensible est externalisée. La sensibilité des modes (de plus d’un MHz) à la variation d’un élément capacitif ou d’une antenne dipôle a été mise en avant numériquement. En pratique, la fabrication des dispositifs a montré une variation différentielle de plusieurs centaines de kHz des résonances selon la condition électrique appliquée à l’un des ports.Finalement, des filtres, dédiés aux applications stratégiques, agiles en fréquence sont réalisés. L’objectif de faire varier la fréquence centrale des dispositifs au cours de leur fonctionnement est atteinte en modifiant les conditions électriques appliquées aux réflecteurs. Deux types de tirage en fréquence sont observés : un glissement fin, de quelques ‰ de la fréquence centrale, cyclique, et un saut de fréquences lié au glissement et à l’ouverture de la bande de Bragg des miroirs aux hautes fréquences. La fabrication des structures et leur connexion à des interrupteurs MEMS validé la faisabilité de la structure.Ces travaux mettent en lumière les capacités de prédiction du comportement des structures SAW grâce au développement de logiciels dédiés. De plus, l’étude et la réalisation de filtres et capteurs innovants ouvre la voie à de nouvelles fonctionnalitésThis thesis aims at designing innovative, passive and wireless surface acoustic waves (SAW) sensors and filters, dedicated to harsh environments. Several types of SAW components are consequently studied. The main characteristics, such as insertion losses or relative bandwidth, of usual structures (resonators, delay lines, LCRF, ladder filters…) are known by men of the art. However, to design a SAW device that respects specific requirements, the definition of the proper behavior of each device must be established before the manufacturing.For this purpose, numerical models are developed. Not only they include the possibility to analyse he beha-vior of systems with complex geometry (ladder filters, apodised transducers) but they take into account disturbing phenomena (transverse modes, losses due to the intrinsic nature of the materials). The comparison between computations and measures points out the match between experimental results and calculations.The implementation of these tools allows the development of innovative SAW sensors and filters thanks to a fast and reliable numerical analysis of their behavior.Thus, the design of resonators and sensors dedicated to a use at temperatures exceeding 700°C is studied. It is demonstrated that despite its inhomogeneity, Ba2TiSi2O8 is suitable for the manufacturing of SAW devices subject to high temperatures and in a frequency range from 300 MHz to the GHz.Furthermore, a structure composed of a three electrodes per wavelength transducer is used to produce re-sonators that are not subject to directivity effects when the temperature changes. This configuration offers the possibility to design sensors that use a single resonator (versus at least two until now). This last point makes smaller components possible and solves the question of a differential aging of the structures.A second type of sensors, also passive and wireless, dedicated to humidity measurements, based on the use of a single SAW, is studied. In this new configuration, a LCRF is used as a transponder and the sensitive area is outsourced. The mode sensitivity (of more than a MHz) to the variation of a capacitance or a dipole antenna is numerically brought to light. In practice, the device manufacturing showed a differential variation of the resonances of about 600 kHz depending on the electric condition applied to one of the ports.Finally, filters, dedicated to strategic applications, with frequency agility are designed. The purpose is to make the frequency vary depending on the electrical conditions applied to the mirrors. Two kinds of agility are identified : a slight sliding, of a few ‰ of the initial central frequency, periodic, and a frequency jump due to the shift of the Bragg band to the high frequencies. The manufacturing of some structures and their connection to MEMS switches attest the feasibility of such a structure.This work highlights the ability to predict the behavior of SAW structures thanks to the development of dedicated software. Moreover, the analysis and the manufacturing of innovative sensors and filters pave the way to new functionalities
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Jendrzejczak, Christophe. "Développement de techniques de séparation et d’identification de capteurs passifs SAW". Thesis, Université Côte d'Azur, 2021. http://www.theses.fr/2021COAZ4119.
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De par leur nature purement passive, les capteurs utilisant la technologie SAW (Surface Acoustic Wave) présentent un fort intérêt dans le cas d’environnements sévères (forts champs électromagnétiques, haute température, …). Ces capteurs sont majoritairement basés sur la mise en parallèle de résonateurs dont la fréquence va varier en fonction de la température, chaque capteur occupant une bande de fréquence définie (sous-bande) et différente (multiplexage fréquentiel). Une des limitations actuelles est la largeur limitée des bandes ISM en Europe qui ne permet de ne gérer qu’un faible nombre de sous bandes et limite par conséquent le nombre de capteurs. Deux méthodes ont été étudiées afin de résoudre les problèmes d’identification et de séparation des mesures issues des capteurs SAW.La première méthode dite méthode du nul de rayonnement directement applicable dans le cas de deux capteurs, est basée sur l’utilisation d’un lecteur à 434 MHz qui possède deux sorties antennes déphasées et consiste à ajuster la puissance et la phase des deux signaux émis par chacune des antennes de façon à créer un nul de rayonnement localisé à l’emplacement d’un des deux capteurs. Cette méthode a fait l’objet d’une phase de simulation puis d’une validation expérimentale probante. La seconde méthode est basée sur la mesure de la superposition des réponses temporelles des résonateurs SAW (oscillations amorties caractérisées chacune par quatre paramètres : amplitude A, phase ϕ, fréquence de résonance f et amortissement σ) en deux points de l’espace et le traitement ultérieur de ces mesures à l’aide des techniques hautes résolutions introduites par Prony au début du 19ème siècle. Cette méthode présente l’avantage potentiel de pouvoir fonctionner dans le cas de N capteurs (N supérieur ou égal à 1) avec l’utilisation de deux antennes uniquement connectées au lecteur. Cette méthode permet via un échantillonnage adéquat du signal temporel de construire un système d’équations dont la résolution conduit à la détermination des quatre paramètres A, ϕ, f et σ pour chacun des résonateurs, l’information de fréquence étant le paramètre recherché, afin de pouvoir en déduire l’information de température dans le cas d’un capteur de température par exemple. Le système étant fixe, la différence de phase des ondes réémises par les résonateurs permet d’identifier les capteursDue to their purely passive nature, sensors using Surface Acoustic Wave (SAW) technology are of great interest in severe environments (strong electromagnetic fields, high temperature ...). These sensors are mainly based on the paralleling of resonators whose frequency will vary depending on the temperature, each sensor occupying a defined frequency band (sub-band and frequency multiplexing). One of the current limitations is the bandwidth of the ISM bands in Europe, which allows only a small number of sub-bands and therefore sensors to be managed. Two methods have been studied to solve the problems of identification and separation of measurements from SAW sensors.The first one, known as the radiation null method directly applicable in the case of two sensors, is based on the use of a 434 MHz reader which has two out-of-phase antenna outputs and consists in adjusting the power and the phase of the two emitted signals. Each of the antennas create a null radiation toward one of the two sensors. This method has been first validated in simulations and then experimentally.The second method is based on the measurement of the superposition of the temporal responses of the SAW resonators (damped oscillations each characterized by four parameters: amplitude A, phase φ, resonance frequency f and damping σ) at two spatial points and the post-processing of these measurements using the high-resolution techniques introduced by Prony in the early 19th century. This method is advantageous because it enables to operate in the case of N sensors (N greater than or equal to 1) with the use of two antennas only connected to the reader. This method makes it possible, through an adequate sampling of the temporal signal, to construct a system of equations whose resolution leads to the determination of the four parameters A, φ, f and σ for every resonator, the frequency information is the desired parameter. For example, we can extract the temperature in the case of a thermal sensor. The system is fixed; the phase difference of the waves re-emitted by the resonators makes it possible to identify the sensors
Książki na temat "Wireless technology - Acoustic"
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1966-, Xiao Yang, red. Underwater acoustic sensor networks. Boca Raton: Auerbach Publications, 2010.
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Benesty, Jacob, Jingdong Chen i Yiteng Huang. Acoustic MIMO Signal Processing (Signals and Communication Technology). Springer, 2006.
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Underwater Acoustic Sensor Networks. AUERBACH, 2008.
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Benesty, Jacob. Acoustic MIMO Signal Processing (Signals and Communication Technology). Springer, 2006.
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Hu, Fei. Magnetic Communications: From Theory to Practice. Taylor & Francis Group, 2018.
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Hu, Fei. Magnetic Communications: From Theory to Practice. Taylor & Francis Group, 2018.
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Magnetic Communications: From Theory to Practice. Taylor & Francis Group, 2018.
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Hu, Fei. Magnetic Communications: From Theory to Practice. Taylor & Francis Group, 2018.
Znajdź pełny tekst źródłaCzęści książek na temat "Wireless technology - Acoustic"
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Bok, Junyeong, i Heung-Gyoon Ryu. "Wireless Multimedia Acoustic Transmission with MIMO-OFDM". W Convergence and Hybrid Information Technology, 123–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24082-9_15.
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Kar, Asutosh, i Mahesh Chandra. "An Optimized Structure Filtered-x Least Mean Square Algorithm for Acoustic Noise Suppression in Wireless Networks". W Signals and Communication Technology, 191–206. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2129-6_10.
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Yoon, Dong-Jin, Ung Seomoon, Dae-Cheol Seo, Chi-Yeop Kim, Seung Seok Lee i Il-Bum Kwon. "Wireless fiber optic acoustic sensors for crack monitoring". W World Forum on Smart Materials and Smart Structures Technology. CRC Press, 2008. http://dx.doi.org/10.1201/9781439828441.ch80.
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Rani, Esha, i Vikas Juneja. "Secure Communication Techniques for Underwater WSNs". W Energy-Efficient Underwater Wireless Communications and Networking, 171–86. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3640-7.ch011.
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Earth is solitary among the rocky planets revolving in the solar system. It is the only planet that is 3/4 covered with oceans of liquid water. In today's era, wireless sensor network is used in almost places and also is an interesting topic for researchers too. But with the advancement in technology, a network similar to wireless sensor network can be deployed under the water with acoustic signals for data transmission. Because of harsh environment and some more challenges, underwater communication becomes tricky. Underwater wireless sensor networks (UWSNs) is an advanced technology for underwater explorations and have demonstrated their quality in underwater applications. UWSN is a blend of wireless technology with sensor technology that has some extraordinary features like smart sensing, intelligent computing, and communication capabilities. Further, to maintain the secure communication underwater, it becomes more and more tricky. This chapter presents an expansive analysis of challenges, attacks, and security techniques of UWSNs.
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Atham, Saira Banu, i Kalpna Guleria. "Smart City in Underwater Wireless Sensor Networks". W Energy-Efficient Underwater Wireless Communications and Networking, 287–301. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3640-7.ch019.
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The earth is covered 71% by water and the human utilizes the remaining 29% for their shelter and living. The idea of living under the water is possible only in fiction movies for our ancestors. But in this century, the idea of living in an underwater city has become a reality with the development of the existing technology. The exploration of the undersea is booming in the science community, which shows the path for underwater cities, underwater museum, and underwater hotels. This chapter contributes the information related to underwater smart cities in three folds: (1) discusses the major challenges in developing the underwater infrastructure, (2) introduces the internet of underwater things components involved in interconnecting the devices for underwater acoustic communication, (3) list the examples of the existing masterpiece architecture constructed underwater.
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Yogeesh, N. "Fuzzy Logic Modelling of Nonlinear Metamaterials". W Advances in Wireless Technologies and Telecommunication, 230–69. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-8287-2.ch010.
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Nonlinear metamaterials have interesting properties that could change the way technology works. Modelling the complex behaviour of metamaterials is needed to improve their performance and make new gadgets. This chapter looks at fuzzy logic models for complex effects in metamaterials. This part talks about fuzzy sets, membership functions, fuzzy rules, and inference systems. Metamaterials don't behave in a straight way, so there are problems with describing them. Input factors, membership functions, along with fuzzy rules are talked about in the modelling method of fuzzy logic for nonlinear metamaterials. Acoustic and visual metamaterial case studies show how fuzzy logic models can be used. This part also talks about the latest developments, possible uses, and pros and cons of fuzzy logic models in nonlinear metamaterials. This chapter tells scientists and engineers how to use fuzzy logic to model and understand nonlinear metamaterials.
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Verhulst, Pim. "Beckett’s Technography: Traces of Radio in the Later Prose". W Samuel Beckett and Technology, 95–108. Edinburgh University Press, 2021. http://dx.doi.org/10.3366/edinburgh/9781474463287.003.0007.
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This chapter traces the impact of the radio medium on Samuel Beckett’s later prose. In addition to introducing broadcast terminology and foregrounding the voice as well as the act of listening more profoundly, these texts also differ from their predecessors in the way that they formally reflect their acoustic nature. Not only are these characteristics indebted to Beckett’s brief period of writing for the radio from 1956 to 1962, they are also shaped by his failed attempts at trying to hear from Paris the BBC broadcasts of his radio plays and prose adaptations, which were often distorted by static interference. This influence of the medium is prominent during the late 1950s and the early 1960s, especially in The Unnamable and How It Is, but even as late as the 1970s. Company, for example, combines Beckett’s conception of radio as a voice emerging from the dark with his descriptions of the wireless device as a provider of companionship. This chapter thus analyzes his work from an intermedial point of view, situating it in the context of larger cultural phenomena such as technography, as a form of writing indebted to and even mediated by audiovisual technologies without being directly conceived for them.
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Khashchanskiy, Victor I., i Andrei L. Kustov. "Acoustic Data Communication with Mobile Devices". W Mobile Computing, 1135–42. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-054-7.ch094.
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One of the applications of m-commerce is mobile authorization, that is, rights distribution to mobile users by sending authorization data (a token) to the mobile devices. For example, a supermarket can distribute personalized discount coupon tokens to its customers via SMS. The token can be a symbol string that the customers will present while paying for the goods at the cash desk. The example can be elaborated further—using location information from the mobile operator, the coupons can only be sent to, for example, those customers who are in close vicinity of the mall on Saturday (this will of course require customers to allow disclosing their location). In the example above, the token is used through its manual presentation. However, most interesting is the case when the service is released automatically, without a need for a human operator validating the token and releasing a service to the customer; for example, a vending machine at the automatic gas station must work automatically to be commercially viable. To succeed, this approach requires a convenient and uniform way of delivering authorization information to the point of service—it is obvious that an average user will only have enough patience for very simple operations. And this presents a problem. There are basically only three available local (i.e., short-range) wireless interfaces (LWI): WLAN, IR, and Bluetooth, which do not cover the whole range of mobile devices. WLAN has not gained popularity yet, while IR is gradually disappearing. Bluetooth is the most frequently used of them, but still it is not available in all phones. For every particular device it is possible to send a token out using some combination of LWI and presentation technology, but there is no common and easy-to-use combination. This is a threshold for the development of services. Taking a deeper look at the mobile devices, we can find one more non-standard simplex LWI, which is present in all devices—acoustical, where the transmitter is a phone ringer. Token presentation through acoustic interface along with general solution of token delivery via SIM Toolkit technology (see 3GPP TS, 1999) was presented by Khashchanskiy and Kustov (2001). However, mobile operators have not taken SIM Toolkit into any serious use, and the only alternative way of delivering sound tokens into the phone-ringing tone customization technology was not available for a broad range of devices at the time the aforementioned paper was published. Quite unexpectedly, recent development of mobile phone technologies gives a chance for sound tokens to become a better solution for the aforementioned problem, compared with other LWI. Namely, it can be stated that every contemporary mobile device supports either remote customization of ringing tones, or MMS, and in the majority of cases, even both, thus facilitating sound token receiving over the air. Most phone models can playback a received token with only a few button-clicks. Thus, a sound token-based solution meets the set criteria better than any other LWI. Token delivery works the same way for virtually all phones, and token presentation is simple. In this article we study the sound token solution practical implementation in detail. First, we select optimal modulation, encoding, and recognition algorithm, and we estimate data rate. Then we present results of experimental verification.
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Khashchanskiy, V. "Acoustic Data Communication with Mobile Devices". W Encyclopedia of Mobile Computing and Commerce, 15–19. IGI Global, 2007. http://dx.doi.org/10.4018/978-1-59904-002-8.ch003.
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One of the applications of m-commerce is mobile authorization, that is, rights distribution to mobile users by sending authorization data (a token) to the mobile devices. For example, a supermarket can distribute personalized discount coupon tokens to its customers via SMS. The token can be a symbol string that the customers will present while paying for the goods at the cash desk. The example can be elaborated further—using location information from the mobile operator, the coupons can only be sent to, for example, those customers who are in close vicinity of the mall on Saturday (this will of course require customers to allow disclosing their location).In the example above, the token is used through its manual presentation. However, most interesting is the case when the service is released automatically, without a need for a human operator validating the token and releasing a service to the customer; for example, a vending machine at the automatic gas station must work automatically to be commercially viable. To succeed, this approach requires a convenient and uniform way of delivering authorization information to the point of service—it is obvious that an average user will only have enough patience for very simple operations. And this presents a problem. There are basically only three available local (i.e., short-range) wireless interfaces (LWI): WLAN, IR, and Bluetooth, which do not cover the whole range of mobile devices. WLAN has not gained popularity yet, while IR is gradually disappearing. Bluetooth is the most frequently used of them, but still it is not available in all phones. For every particular device it is possible to send a token out using some combination of LWI and presentation technology, but there is no common and easy-to-use combination. This is a threshold for the development of services. Taking a deeper look at the mobile devices, we can find one more non-standard simplex LWI, which is present in all devices—acoustical, where the transmitter is a phone ringer. Token presentation through acoustic interface along with general solution of token delivery via SIM Toolkit technology (see 3GPP TS, 1999) was presented by Khashchanskiy and Kustov (2001). However, mobile operators have not taken SIM Toolkit into any serious use, and the only alternative way of delivering sound tokens into the phone-ringing tone customization technology was not available for a broad range of devices at the time the aforementioned paper was published. Quite unexpectedly, recent development of mobile phone technologies gives a chance for sound tokens to become a better solution for the aforementioned problem, compared with other LWI. Namely, it can be stated that every contemporary mobile device supports either remote customization of ringing tones, or MMS, and in the majority of cases, even both, thus facilitating sound token receiving over the air. Most phone models can playback a received token with only a few button-clicks. Thus, a sound token-based solution meets the set criteria better than any other LWI. Token delivery works the same way for virtually all phones, and token presentation is simple. In this article we study the sound token solution practical implementation in detail. First, we select optimal modulation, encoding, and recognition algorithm, and we estimate data rate. Then we present results of experimental verification.
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Midani, Mowaffak T. "AI-Based Smart Access Systems and Applications for Smart Cities and Living Spaces". W Role of 6G Wireless Networks in AI and Blockchain-Based Applications, 80–111. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-5376-6.ch004.
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This chapter covers the subject of smart access systems in a world energized by 6G networks, proximity processing, digital twin modeling, artificial intelligence, machine learning, IoT devices, smartphones, and blockchain technologies. The logical representation of the system is first presented followed by the physical network architecture. Typical use cases are presented covering an entire smart city powered by 6G network, followed by targeted use cases covering residential, commercial, aviation, and industrial applications. The suite of Fourth Industrial Revolution technologies used to enable the smart access are then presented with examples from different sectors. Benefits of smart access to individuals, businesses, and the society at large are presented covering personal and property security, touchless operations, asset tracking in warehouses and factories, energy conservation, and operational optimization. The chapter concludes with some thoughts about future research work that includes fiber-based distributed acoustic sensing technology and blockchain-based traceability.
Streszczenia konferencji na temat "Wireless technology - Acoustic"
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Fei, Chen, Li Jianqing, Wu Jianfeng i Ge Yang. "Acoustic Source Localization Technology Research in Wireless Sensor Networks". W 2012 International Conference on Industrial Control and Electronics Engineering (ICICEE). IEEE, 2012. http://dx.doi.org/10.1109/icicee.2012.148.
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Wang, Mingfei, Linlin Ci, Ping Zhang i Yongjun Xu. "Acoustic Source Localization in Wireless Sensor Networks". W Workshop on Intelligent Information Technology Application (IITA 2007). IEEE, 2007. http://dx.doi.org/10.1109/iita.2007.64.
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Jia, Jingjing, Mingjie Liu i Xiaofeng Li. "Acoustic Localization Algorithm Using Wireless Sensor Networks". W 2009 Second International Conference on Intelligent Computation Technology and Automation. IEEE, 2009. http://dx.doi.org/10.1109/icicta.2009.340.
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Gao, Mingsheng, i Mingwei Wu. "On the delay performance of selective-repeat ARQ for underwater acoustic channels". W Electronic Systems Technology (Wireless VITAE). IEEE, 2009. http://dx.doi.org/10.1109/wirelessvitae.2009.5172538.
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Mataruco, Antônio, Lauren Harner i Leonardo Castellões. "Real-Time Sample Confirmation with Wireless Acoustic Technology During Downhole Sampling". W Offshore Technology Conference. Offshore Technology Conference, 2016. http://dx.doi.org/10.4043/26887-ms.
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Azevedo, Vinicios, Firman Paluruan i Robert Skwara. "Integrated Wireless Barrier Monitoring System Improves CO2 Well Intervention Efficiency". W International Petroleum Technology Conference. IPTC, 2023. http://dx.doi.org/10.2523/iptc-22891-ea.
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Abstract An LNG plant in Australia was designed to maximize energy efficiency and minimize greenhouse gas emissions. In steady-state operations, its greenhouse gas emissions are lower than any in-country LNG project. Typically, gas supplied from two offshore fields contains CO2 (~14%) and high-volume operations run smoothly. At the time of this project, an injector well was found to have critically high CO2 levels (99%), and two other injector wells were shut-in due to pressure anomalies. A solution was needed to confirm casing isolation and detect leakage, while maintaining well barrier integrity and monitoring pressure/temperature below the tubing hanger plug. An innovative acoustic transmission platform served as a barrier assurance tool. A transmitter module (below the plug) has pressure/temperature sensors sending data through tubular/casing walls. A receiver module (above the plug) also houses pressure/temperature sensors. Once configured and deployed downhole, barrier installation is recorded, and barrier setting is verified before pressure testing. During the pressure test, sensors record pressure/temperature (in Wireline mode or fed live to surface) from either side of the barrier, confirming its integrity. The integrated wireless barrier monitoring solution exceeded customer expectations, with continuous acoustic and wireless communication maintained throughout the entire operation. Simultaneous monitoring of two wells for 500+ hours accurately documented the barrier integrity via pressure testing results. The system was run downhole in conjunction with a non-explosive slickline setting tool and retrievable bridge plug allowing to not only log the setting sequence for quality assurance but also record the pressure & temperature across the barrier. Conducted on-location, the customer was able to witness the plugs being successfully set. They then received positive confirmation of established well barrier, by continuous monitoring of the pressure between the two barriers and interpreting data from the wireless system in real time. This combined technology approach reduces time to troubleshoot and verify barriers, enabling quick evaluation of the leak source. Other benefits include significant time savings over traditional isolation methods, improving personnel safety in the well bay area by conducting real-time diagnostics, while also optimizing the suspension to allow efficient intervention or abandonment operations. The main objective of the operation was met, and verification of the shallow set plug was achieved. Barrier verification without the acoustic real-time wireless system would have been questionable. During well intervention for a major LNG plant operator in Western Australia, the novel wireless barrier monitoring solution delivered efficient, real-time pressure testing and verification to ensure success. This marks the first global installation of an integrated barrier system, combining retrievable bridge plug with wireless acoustic telemetry in supercritical CO2 disposal well. It not only allows a shallow bridge plug to be verified as a leak-free barrier, but it also enables efficient evaluation of the entire well barrier envelope.
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Fan, Z., R. X. Gao i D. O. Kazmer. "Acoustic-based wireless data transmission for process monitoring". W 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2013. http://dx.doi.org/10.1109/i2mtc.2013.6555654.
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Ignatius, Manu, Prasad Anjangi i Mandar Chitre. "Smart Wireless Data Transfer Solution for Underwater Sensors Powered by Edge Computing". W Offshore Technology Conference. OTC, 2023. http://dx.doi.org/10.4043/32543-ms.
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Abstract With the ever-increasing number of underwater assets and structures driven by the energy industry's shift to renewables, the need for reliable long-term remote monitoring solutions for both environments and assets is growing. Such solutions typically consist of a suite of sensors, the data transfer mechanism, and data analytics and visualization. Underwater wireless technology is the key enabler for such a holistic monitoring solution that can be used for a variety of applications. However, many commercial operations are designed around the assumption that underwater wireless technology is not yet suitable for today's operational needs. While there are several advancements in the domain of underwater wireless systems in recent times, they have not made it to operational commercial systems. In this paper, we look at the example of Acoustic Doppler Current Profilers (ADCPs), where a typical operation relies on either offline data download or using a cable to perform real-time data transfer. We then illustrate how such an operation can be transformed by integrating a smart modem that packs technologies such as software-defined design, edge computing, and machine learning along with robust and reliable high-speed underwater wireless communications to an ADCP to achieve flexible and reliable wireless data transfer. The software-defined design aspect allows easy integration to a variety of sensors, in this example an ADCP. The edge computing and machine learning aspects allow the modems to optimize the data for a high-speed acoustic link that supports adaptive modulation and automatic retransmission to avoid data loss. Smart scheduling techniques are incorporated into the solution to support extremely low-power modes to enable long-term deployments. An application-specific web-based user interface (UI) provides a seamless user experience during the whole operation. Integrating such innovations to form a holistic solution for long-term monitoring can drive down overall costs and improve operational safety.
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Dandan, Pang, Wang Ming, Guo Dongmei i Sai Yaozhang. "Acoustic emission inspection based on wireless FBG sensing system". W 2016 10th International Conference on Sensing Technology (ICST). IEEE, 2016. http://dx.doi.org/10.1109/icsenst.2016.7796276.
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Chakraborty, Joyraj, Geoffrey Ottoy, Maxim Gelaude, Jean-Pierre Goemaere i Lieven De Strycker. "Acoustic localization of unknown sources with wireless sensor nodes". W 2014 17th International Conference on Computer and Information Technology (ICCIT). IEEE, 2014. http://dx.doi.org/10.1109/iccitechn.2014.7073119.
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