3D-6 New Solution to Air-Data Transmission Using Low-Cost Narrow-Band Ultrasonic Transducers

2007 ◽  
Author(s):  
J.-P. Sandoz
Keyword(s):  
Data Transmission ◽  
Narrow Band ◽  
Low Cost ◽  
Ultrasonic Transducers

scholarly journals Sensor Networks for Structures Health Monitoring: Placement, Implementations, and Challenges—A Review

Vibration ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 551-584
Author(s):  
Samir Mustapha ◽  
Ye Lu ◽  
Ching-Tai Ng ◽  
Pawel Malinowski
Keyword(s):  
Sensor Networks ◽  
Health Monitoring ◽  
Data Transmission ◽  
System Integration ◽  
Structural Integrity ◽  
Low Cost ◽  
Data Communication ◽  
Total Cost ◽  
Design And Optimization ◽  
Successful Case

The development of structural health monitoring (SHM) systems and their integration in actual structures has become a necessity as it can provide a robust and low-cost solution for monitoring the structural integrity of and the ability to predict the remaining life of structures. In this review, we aim at focusing on one of the important issues of SHM, the design, and implementation of sensor networks. Location and number of sensors, in any SHM system, are of high importance as they impact the system integration, system performance, and accuracy of assessment, as well as the total cost. Hence we are interested in shedding the light on the sensor networks as an essential component of SHM systems. The review discusses several important parameters including design and optimization of sensor networks, development of academic and commercial solutions, powering of sensors, data communication, data transmission, and analytics. Finally, we presented some successful case studies including the challenges and limitations associated with the sensor networks.

The Design and Implementation of ECC High-Speed Encryption Engine Based on FPGA

2012 ◽  
Vol 459 ◽  
pp. 544-548 ◽  
Author(s):  
Wei Liang ◽  
Jian Bo Xu ◽  
Wei Hong Huang ◽  
Li Peng
Keyword(s):  
Data Transmission ◽  
High Speed ◽  
Lower Cost ◽  
Low Cost ◽  
Rapid Development ◽  
Security Technology ◽  
Multiplication Algorithm ◽  
Secure Data Transmission ◽  
And Performance ◽  
Computation Speed

Network security technology ensures secure data transmission in network. Meanwhile, it brings extra overhead of security system in terms of cost and performance, which seriously affects the rapid development of existing high-speed encryption systems. The existing encryption technology cannot meet the demand of high security, low cost and high real-time. For solving above problems, an ECC encryption engine architecture based on scalable public key cipher and a high-speed configurable multiplication algorithm are designed. The algorithm was tested on FPGA platform and the experiment results show that the system has better computation speed and lower cost overhead. By comparing with other systems, our system has benefits in terms of hardware overhead and encryption time ratio

scholarly journals Fiber-optic Synchronization and Data Transmission Subsystem of Multichannel Phased Array

2020 ◽  
Vol 23 (3) ◽  
pp. 7-12
Author(s):  
Y. A. Svetlichniy ◽  
Keyword(s):  
Data Transmission ◽  
Phased Array ◽  
Fiber Optic ◽  
Low Cost ◽  
Digital Data ◽  
Processor Core ◽  
Analog Signals ◽  
Distribution Scheme ◽  
Optical Analog ◽  
Data Transferring

The article deals with the practical aspects of synchronization and data transferring in multichannel phased array systems, especially in systems with big antenna dimensions. In multichannel passed array antenna commonly used an optical analog signals distribution scheme for RF and heterodyne signals and wired interfaces for control and digital data. For modern digital antennas the data transferring and synchronization method, based on digital fiber optic channels, was presented. The schemes, constructions, and algorithms of the method are described. The method was realized as SDR system using FPGA with soft-processor core. For data transferring the 8b/10b code is used. The following result of experiment are discussed: digital optical lines are resistant to signals distortions, can transfer big data massive with minimal delay, have excellent synchronization capabilities at quite low cost.

scholarly journals Comparative Analysis of QoS Management and Technical Requirements in 3GPP Standards for Cellular IoT Technologies

2018 ◽  
Vol 2 ◽  
pp. 41-47 ◽  
Author(s):  
Valery Tikhvinskiy ◽  
Grigory Bochechka ◽  
Andrey Gryazev ◽  
Altay Aitmagambetov
Keyword(s):  
Comparative Analysis ◽  
New Technologies ◽  
Narrow Band ◽  
Low Cost ◽  
Low Latency ◽  
Qos Management ◽  
Technical Requirements ◽  
Iot Devices ◽  
Positive Results

Optimization of 3GPP standards that apply to cellular technologies and their adaptation to LPWAN has not led to positive results only enabling to compete on the market with the growing number non-cellular greenfield LPWAN technologies – LoRa, Sigfox and others. The need to take into consideration, during the 3GPP standard optimization phase, the low-cost segment of narrow-band IoT devices relying on such new technologies as LTE-M, NB-IoT and EC-GSM, has also led to a loss of a number of technical characteristics and functions that offered low latency and guaranteed the quality of service. The aim of this article is therefore to review some of the most technical limitations and restrictions of the new 3GPP IoT technologies, as well as to indicate the direction for development of future standards applicable to cellular IoT technologies.

scholarly journals Remote-Point Photonic Sensors (Rphos): Concepts-Materials-Devices

2018 ◽  
Vol 4 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Nikolaos A. Vainos
Keyword(s):  
Data Transmission ◽  
Electromagnetic Interference ◽  
Low Cost ◽  
Health And Safety ◽  
Quantitative Detection ◽  
Remote Point ◽  
Security Applications ◽  
Sensor Device ◽  
Photonic Sensors ◽  
Nanocomposite Sensor

Abstract Photonic sensors receive an increasing global attention focusing on critical applications such as the protection of the environment, the health and safety of the citizens. In this work we are concerned with sensing of gaseous environments and focus on a novel class of nanocomposite sensor materials, which are capable to react to external stimulant-agents. These interactions amend their optical properties, fact which provides the means for optical detection. An unpowered sensor device is thus formed, which is interrogated optically and remotely to provide quantitative detection of the “agent”. “Sensing-by-light” thus unfolds the emerging conceptsof “Remote-point Photonic Sensors (RPHOS)”,we review and revisit in this work. The method offers unique means for spatially localized, real-time, multivariable sensing. This “point-in-space” detection may be contrasted to opticalpath- integrating LIDAR operations. Synergy with diffractive and holographic approaches enhance detectability and offer further innovative modes of operation. The low cost of this unpowered sensor-head, the flexibility of fabrication, the capacity for parallel / multiplexed/ data transmission and the immunity to electromagnetic interference, makes this technology ideal for use in harsh and adverse environments of industrial and security applications.

Research on Variable-Frequency-Point Variable-Bandwidth Wireless Broadband Radio Frequency Chip and its Application in the Smart Grid

2011 ◽  
Vol 347-353 ◽  
pp. 3107-3115
Author(s):  
Zi Guan Zhou ◽  
Xiao Shan Pan ◽  
Shu Gang Yin ◽  
Wei Li Ren ◽  
Sheng Bo Sun ◽  
...  
Keyword(s):  
Smart Grid ◽  
Power System ◽  
Radio Frequency ◽  
Communication Technology ◽  
Data Transmission ◽  
Narrow Band ◽  
Frequency Range ◽  
Broadband Radio ◽  
Wireless Broadband ◽  
Residential Electricity

With the development of the smart grid, residential electricity services have a higher bandwidth and frequency requirement to the power system communication , the existing power 230MHz narrow-band data transmission communication has been unable to meet the needs of the two-way interaction between the users and the smart grid. In terms of current communication technology in the power system, this paper introduces a wireless broadband radio frequency chip ,which supports 100MHz to 1.2GHz frequency range, and 5KHz to 2MHz tunable bandwidth.With the chip embedded in intelligent electricity interactive terminals, distribution monitoring terminals and other devices, it can achieve flexible and intelligent electricity services. This paper describes the architecture of the RF chip,and gives key technology solutions such as broadband matching, adjustable IF bandwidth of the channel, sums up the advantages of the chip,presents the application in the smart grid. The analysis finds that the chip has a variety of charateristics such as high integration, good redundancy, versatility, flexibility and so on, and can satisfy the growing application needs of power speacial network,and has an extremely promising market .

scholarly journals Efficient solar-driven water splitting by nanocone BiVO4-perovskite tandem cells

2016 ◽  
Vol 2 (6) ◽  
pp. e1501764 ◽  
Author(s):  
Yongcai Qiu ◽  
Wei Liu ◽  
Wei Chen ◽  
Wei Chen ◽  
Guangmin Zhou ◽  
...  
Keyword(s):  
Water Splitting ◽  
Light Absorption ◽  
Diffusion Length ◽  
Narrow Band ◽  
Low Cost ◽  
High Water ◽  
Hydrogen Electrode ◽  
Efficient Charge ◽  
Multiple Light Scattering ◽  
Pec Water Splitting

Bismuth vanadate (BiVO4) has been widely regarded as a promising photoanode material for photoelectrochemical (PEC) water splitting because of its low cost, its high stability against photocorrosion, and its relatively narrow band gap of 2.4 eV. However, the achieved performance of the BiVO4 photoanode remains unsatisfactory to date because its short carrier diffusion length restricts the total thickness of the BiVO4 film required for sufficient light absorption. We addressed the issue by deposition of nanoporous Mo-doped BiVO4 (Mo:BiVO4) on an engineered cone-shaped nanostructure, in which the Mo:BiVO4 layer with a larger effective thickness maintains highly efficient charge separation and high light absorption capability, which can be further enhanced by multiple light scattering in the nanocone structure. As a result, the nanocone/Mo:BiVO4/Fe(Ni)OOH photoanode exhibits a high water-splitting photocurrent of 5.82 ± 0.36 mA cm−2 at 1.23 V versus the reversible hydrogen electrode under 1-sun illumination. We also demonstrate that the PEC cell in tandem with a single perovskite solar cell exhibits unassisted water splitting with a solar-to-hydrogen conversion efficiency of up to 6.2%.

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