- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2018 10th IAPR Workshop on Pattern Recognition in Remote Sensing (PRRS) - Beijing (2018.8.19-2018.8.20)] 2018 10th IAPR Workshop on Pattern Recognition in Remote Sensing (PRRS) - FPGA Optimization for Hyperspectral Target Detection with Collaborative Representation
摘要： Most applications based on wireless sensor networks (WSN) have devices with constraints of limited energy and computational/storage capabilities. The traditional security mechanisms are not desirable to these applications. A lightweight security and energy-efficient clustering protocol was proposed in this paper to solve the security problem in the clustering-based sensor networks. Firstly, a lightweight security algorithm is proposed to meet the security requirements, which reduces the communication overload by using the transmission key index. Secondly, in the process of clustering, the base station (BS) and cluster head (CH) use lightweight authentication procedure to verify the identities hierarchically, to reduce the risk of attacks from malicious nodes posing as BS or CH. Thirdly, the proposed protocol is analyzed in the aspects of security and energy consumption. Simulation results show that the proposed protocol not only enhances the network security but also improves the energy efficiency.
关键词： Lightweight security,Energy-efficient protocol,Clustering WSN
更新于2025-09-23 15:23:52
-
Design of Real-Time Slope Monitoring system using Time-Domain Reflectometry with Wireless Sensor Network
摘要： Slope monitoring systems using WSN is an efficient technique to track slope movements or failures. Instability in slope contributes greatly in hazards caused to lives and property in mining areas and operations. Electronic instrumentation like wire-line extensometers, piezometers, total stations etc. are used for sensing the slope stability. The available wireless monitoring systems like SSR, LiDAR, Laser monitoring techniques are more expensive. In order to overcome this, efficient and economically feasible measurement systems for slope monitoring are needed. This paper presents the design, development and field implementation of an online, cost-effective wireless system for real-time slope monitoring which gives visible warning of a possible slope failure. The system is designed on Arduino board as a platform with RF module (ZigBee) for wireless communication. Additionally, using python the database and GUI are implemented. The experimental field TDR data is also verified with the total station monitoring system.
关键词： ZigBee,slope monitoring,time domain reflectometry (TDR),Coaxial cable,wireless sensor network (WSN)
更新于2025-09-23 15:22:29
-
Light and pressure sensors based on PVDF with sprayed and transparent electrodes for self-powered wireless sensor nodes
摘要： In this work, we report on the fabrication of light and pressure sensors based on the piezo-and pyro material polyvinylidene fluoride (PVDF). In addition to the operation as sensors, the presented devices are characterized as energy harvesters. To form an electrical connection to the 39 μm thick PVDF foil, solution-based and transparent electrode (TE) materials such as silver nanowires (AgNWs) and poly(3,4-ethylene dioxythiophene) polystyrene sulfonate (PEDOT:PSS) are utilized and compared with commercial aluminum electrodes on polymer substrate. We show that the performance with regard to sensitivity and generated output power of the TE-PVDF devices outperforms the one for the aluminum foil devices. For the piezo- and pyroelectric effect, a pressure and light sensitivity of 3.6 mV/Pa and 42 V cm2/W, respectively, are measured. The maximum RMS power for the piezo- and pyro effect yield to 1 μW and 0.42 μW, respectively, for an active PVDF area of 8 cm2. At the end of this contribution, we show that this power suffices to drive an energy autarkic wireless sensor node (WSN) that is capable of measuring and transmitting an analog sensor signal using ultra-low power components. This application contributes substantially to the notion of the internet of things (IoT) since paramount aspects such as wireless technology, embedded electronics, and environmental sensor data together with an ultra-low power management are addressed.
关键词： wireless sensor nodes,PEDOT:PSS,WSN,Internet of Things,IoT,spray deposition,energy harvesting,silver nanowires,transparent electrodes
更新于2025-09-23 15:21:21
-
Reliability Analysis of Distributed Grid-connected Photovoltaic System Monitoring Network
摘要： A large amount of distributed grid-connected Photovoltaic systems have brought new challenges to the dispatching of power network. Real-time monitoring the PV system can efficiently help improve the ability of power network to accept and control the distributed PV systems, and thus mitigate the impulse on the power network imposed by the uncertainty of its power output. To study the reliability of distributed PV monitoring network, it is of great significance to look for a method to build a highly reliable monitoring system, analyze the weak links and key nodes of its monitoring performance in improving the performance of the monitoring network. Firstly a reliability model of PV system was constructed based on WSN technology. Then, in view of the dynamic characteristics of the network’s reliability, fault tree analysis was used to judge any possible reasons that cause the failure of the network and logical relationship between them. Finally, the reliability of the monitoring network was analyzed to figure out the weak links and key nodes. This paper provides guidance to build a stable and reliable monitoring network of a distributed PV system.
关键词： Monitoring Network,Fault Tree Analysis,Photovoltaic System,WSN,Reliability
更新于2025-09-23 15:19:57
-
[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Frequency Conversion of Broadband mid-IR Carbon Monoxide Laser Radiation into THz Range
摘要： Energy savings optimization becomes one of the major concerns in the wireless sensor network (WSN) routing protocol design, due to the fact that most sensor nodes are equipped with the limited nonrechargeable battery power. In this paper, we focus on minimizing energy consumption and maximizing network lifetime for data relay in one-dimensional (1-D) queue network. Following the principle of opportunistic routing theory, multihop relay decision to optimize the network energy efficiency is made based on the differences among sensor nodes, in terms of both their distance to sink and the residual energy of each other. Specifically, an Energy Saving via Opportunistic Routing (ENS_OR) algorithm is designed to ensure minimum power cost during data relay and protect the nodes with relatively low residual energy. Extensive simulations and real testbed results show that the proposed solution ENS_OR can significantly improve the network performance on energy saving and wireless connectivity in comparison with other existing WSN routing schemes.
关键词： one-dimensional (1-D) queue network,wireless sensor network (WSN),Energy efficiency,opportunistic routing,relay node
更新于2025-09-23 15:19:57
-
Photovoltaic Modules Monitoring Based on WSN With Improved Time Synchronization
摘要： In order to avoid clock skew in WSN (Wireless Sensor Networks) for large-scale photovoltaic modules monitoring, an improved time synchronization algorithm, TSP-GDM (Time Synchronization Protocol with Gaussian Delay Model) is proposed in this paper. Interdependence of local time stamps is established between network nodes according to a linear clock model. Local exchange and share of local time stamps in nodes are achieved by means of wireless transmission. An estimation method with the Gaussian Delay Model is designed to deal with the estimation problems of the node clock offset. The synchronization accuracy of the proposed method is veri?ed with the MATLAB simulation. It is found that TSP-GDM can be applied to synchronous topology of large-scale photovoltaic modules monitoring with a higher synchronization accuracy. Compared to RBS (Reference Broadcast Synchronization), TPSN (Timing-synchronization Protocol for Sensor Networks) and RTSP (Recursive Time-Sync Protocol for WSN), its synchronization accuracy in an inner layer has been increased by 22.57 μs, 15.7 μs and 4.26 μs respectively.
关键词： photovoltaic modules monitoring,time synchronization,Gaussian delay model,WSN
更新于2025-09-11 14:15:04
-
[IEEE 2018 10th International Conference on Information Technology and Electrical Engineering (ICITEE) - Bali, Indonesia (2018.7.24-2018.7.26)] 2018 10th International Conference on Information Technology and Electrical Engineering (ICITEE) - Implementation of Solar Tracking System to Maximize Energy Absorption in Wireless Sensor Network
摘要： Wireless Sensor Network is a system to monitor area condition from the different place. WSN is usually located in distant or difficult to reach places, therefore the use of energy is very important and become a big concern. One of the solutions is WSN must be able to generate energy from the renewable energy such as sunlight. There are so many researches which propose the new way of increasing energy produced by solar cells. This is effective but still have a room of improvement such as to ensure maximum absorption energy by solar panels, the direction of the coming light must be perpendicular to the surface solar panels, and this is not yet achieved. Therefore, to improve the efficiency of solar panels, the author took the initiative to combine Maximum Power Point Tracking technology with dual axis solar tracking system to optimize absorption energy by solar panels. The proposed solar tracking technology uses LDR sensors to detect the direction of the coming light, so this system can adjust to various conditions to make sure the absorption is maximum.
关键词： Wireless Sensor Network (WSN),Arduino,Solar Tracking,Internet of Things,Maximum Power Point (MPP)
更新于2025-09-10 09:29:36
-
[IEEE 2018 IEEE 23rd International Conference on Emerging Technologies and Factory Automation (ETFA) - Torino, Italy (2018.9.4-2018.9.7)] 2018 IEEE 23rd International Conference on Emerging Technologies and Factory Automation (ETFA) - An Energy Measurement System for Characterization of Energy Harvesting Systems
摘要： Energy neutral computing is seen as a design approach for wireless sensor nodes (WSN) which are powered by energy harvesters. The approach relies on keeping an equilibrium between consumption and harvesting of energy and typically uses models for energy prediction and management. To adapt models to specific systems and environments, often characterization measurements are used. Measurements strongly influence the model quality and with this the usability of such WSN. In this paper a novel measurement system (PiEMS) is presented that outperforms existing approaches and helps to optimize typical characterization tasks. The increased accuracy of characterization and modeling are exemplified for different WSN applications.
关键词： Wireless sensor node (WSN),Characterization,Energy harvesting,Energy neutral computing,Current measurement,Low power measurement,Energy measurement system
更新于2025-09-10 09:29:36
-
[Advances in Intelligent Systems and Computing] Advances in Big Data and Cloud Computing Volume 750 (Proceedings of ICBDCC18) || Luminaire Aware Centralized Outdoor Illumination Role Assignment Scheme: A Smart City Perspective
摘要： In the modern era of smart cities, devices are becoming much smarter, smaller, and energy-ef?cient. Modern devices are able to communicate and process with the adaptation of Internet of Things. Despite breakthrough in technologies, a majority of the power generated is utilized for outdoor illumination. Existing smart outdoor illumination methods are self-actuated by the onboard sensors in the luminaire leading to power savings. Investigation reveals the need of ef?cient illumination through the smart collaboration among luminaires. A centralized outdoor illuminating role assignment scheme is proposed to address the collaborative illumination between the heterogeneous luminaires. Simulations and comparisons were carried out on the proposed centralized scheme with the legacy approach and the self-actuated ZB-OLC assignment scheme. The paper concludes with the comparative analysis and simulation results of the effect of role assignment on various types of luminaires, overall power consumption and lifetime analysis of the luminaires with perspective to zones, duration, and neighboring luminaires.
关键词： WSN,Street lighting,WSAN,Smart city,IoT
更新于2025-09-04 15:30:14