A Fluid Dynamic Based Coordination of a Wireless Sensor Network of Unmanned Aerial Vehicles: 3-D Simulation and Wireless Communication Characterization

2011 ◽  
Vol 11 (3) ◽  
pp. 722-736 ◽  
Author(s):  
Apratim Shaw ◽  
Kamran Mohseni
Keyword(s):  
Wireless Sensor Network ◽  
Wireless Communication ◽  
Unmanned Aerial Vehicles ◽  
Sensor Network ◽  
Fluid Dynamic ◽  
Wireless Sensor ◽  
Aerial Vehicles

scholarly journals Passive localization of signal source based on wireless sensor network in the air

2018 ◽  
Vol 14 (3) ◽  
pp. 155014771876737
Author(s):  
Pengwu Wan ◽  
Yongjing Ni ◽  
Benjian Hao ◽  
Zan Li ◽  
Yue Zhao
Keyword(s):  
Wireless Sensor Network ◽  
Unmanned Aerial Vehicles ◽  
Sensor Network ◽  
Multipath Fading ◽  
Time Difference ◽  
Wireless Sensor ◽  
Signal Source ◽  
Time Difference Of Arrival ◽  
Aerial Vehicles ◽  
Passive Localization

Passive localization of the wireless signal source attracts a considerable level of research interest for its wide applications in modern wireless communication systems. To accurately locate the signal source passively in the downtown area, sensors are carried on the unmanned aerial vehicles flying in the air, where the wireless sensor network can be established with an optimal geometry configuration conveniently. In this case, the influence of multipath fading can be avoided and the time difference of arrival measurement can be estimated precisely in Rician channel. By employing the operating center as a calibration source to refine the positions of the unmanned aerial vehicles, we present a simplified formulation of the time difference of arrival localization method according to the min-max criterion. To accurately estimate the position of the source, the nonlinear equations are relaxed using semidefinite programming to obtain an initial solution, which is utilized as the starting point of the iterative algorithm to refine the solution. In the simulation section, the validity and the robustness of the proposed methods are verified through the performance comparison with the Cramer–Rao lower bound.

scholarly journals Design and Implementation of a Wireless Sensor Network Node Based on Arduino

2017 ◽  
Vol 13 (11) ◽  
pp. 128 ◽  
Author(s):  
Yang Wang
Keyword(s):  
Wireless Sensor Network ◽  
Wireless Communication ◽  
Sensor Network ◽  
Information Acquisition ◽  
Communication Protocol ◽  
Functional Module ◽  
Wireless Sensor ◽  
Network Node ◽  
Network Nodes ◽  
Communication Program

<p><span style="font-family: 宋体; font-size: medium;">For dealing with the limitations and deficiencies of present wireless sensor network nodes, including poor flexibility, low degree of variability, low generality, Arduino development advantages are combined with ZigBee wireless communication technologies characteristics. The versatility and flexibility of wireless sensor network nodes and the cost and energy consumption of nodes are studied. First of all, ZigBee communication protocol and networking technology are studied, and based on this, communication protocols that the subjects need are designed. Secondly, the hardware system of ZigBee wireless sensor network node based on Arduino technology is discussed and designed. In addition, suitable Arduino development panel is selected in accordance with requirements of ZigBee wireless sensor network node. With the development panel as the design prototype, the circuit of functional module is designed. Thirdly, based on the wireless sensor network node communication protocol and hardware design, the software system of wireless sensor network node is designed and realized. The results showed that, through designing reasonable software working flow and compiling efficient information acquisition and wireless communication program, the intelligence orientation of node information acquisition and information transmission is achieved. In a word, it can be concluded that, combined with Arduino, a better function can be achieved.</span></p>

Diminishing Connectivity Failures by Auto-Reconfiguration in WSN

2017 ◽  
Vol 8 (3) ◽  
pp. 662
Author(s):  
K. Gugan ◽  
V. Saravanan
Keyword(s):  
Wireless Sensor Network ◽  
Wireless Communication ◽  
Sensor Network ◽  
Long Range ◽  
Network Performance ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Energy Depletion ◽  
Total Communication ◽  
Node Energy

<p>The Wireless Sensor Network is one of the most significant purposes behind the accomplishment of long range wireless communication. Frequent connectivity failures are occurred in the sensor-organised network due to obstruction, snags, message drop because of node energy depletion; obstacle and so forth. The total communication gets collapsed if there any lessening in the nature of correspondence or quality between the sensor nodes or from the sensor nodes to the sink nodes and this prompts to connection failures. To overcome the frequent connectivity failures we propose Diminishing Connectivity Failures by Auto-Reconfiguration in WSN (DCFA). This scheme provides steadfast routes to reduce the connectivity failure and improve the network performance. </p>

scholarly journals Application of Wireless Sensor Network based on LoRa in City Gas Meter Reading

2017 ◽  
Vol 13 (12) ◽  
pp. 104 ◽  
Author(s):  
Kun Wang
Keyword(s):  
Wireless Sensor Network ◽  
Wireless Communication ◽  
Power Consumption ◽  
Low Power ◽  
Sensor Network ◽  
Communication Technology ◽  
Wireless Sensor ◽  
Low Power Consumption ◽  
Long Distance ◽  
Reading System

<span style="font-family: 'Times New Roman',serif; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: DE; mso-bidi-language: AR-SA;">At present, the common meter reading method in gas meter reading system is manual. The meter reader enters the meter reading system to calculate the cost after getting the reading. This work is not only labour-intensive, but also inefficient. In addition, incorrect reading may occur due to human errors. With the development of the wireless communication technology, a wireless communication technology named LoRa for long-distance and low-power-consumption devices appeared. LoRa is a wireless communication technology with long transmission distance, low power consumption, low transmission speed, low complexity and low cost. It is mainly used in automatic control and internet of things. Through the comparison and analysis of several wireless communication technologies, a gas meter reading platform based on LoRa spread spectrum and wireless sensors is proposed. First of all, this paper briefly introduces the LoRa wireless communication technology and machine vision technology. Secondly, it gives a detailed introduction to the overall design of the system which includes system architecture design, information acquisition terminal, image acquisition module and wireless sensor module. Finally, an experiment is carried out in a residential area. The results show that the gas meter reading platform based on LoRa and wireless sensor network has a high practical value.</span>

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