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The paper aims to design video wireless sensor nodes based on IEEE 802.11 communication protocols, using SPI interfaces on the connection of the WIFI communication module and the host controller for data exchange because of the fact that there exist limitations in terms of the display of live video images due to Zigbee transmission rate limit. In addition, the video wireless WIFI sensor node also...
As the human pays more and more attention to the exploration of marine resources, the marine activities show diversity. At the aspect of the exploration of some uncharted and potentially dangerous waters or islands, the marine low altitude surveillance UAV (unmanned aerial vehicle) is obviously very important. As a tool to obtain first-hand information, UAV can take off near the monitored area. Carrying...
A Solar-Powered Sensor Module (SPSM) that uses low-cost capacitors as energy buffers to power wireless sensor motes was investigated. Compared to batteries or super capacitors, SPSM is particularly suitable for light-weight tasks since it buffers limited energy and powers up periodically. With our method, the energy charging time can be shortened to about 100 ms for a maximum power point tracking...
Underwater acoustic sensor networks (UASN) based on the advances in underwater data collection and observing systems may play an important role in oceanographic research. UASN typically comprises of sensor nodes that are deployed in sufficiently large numbers for data collection, monitoring and surveillance, where sensor nodes are also energy limited without easy way to replenish power unfortunately...
Based on analysis of characteristics of UV (Ultraviolet) light power envelope and the output signal of the detector, a modulation scheme for UV communication system employing low pressure mercury lamp as lamp house was proposed. In the scheme, the frequency of UV power envelope is controlled by the current frequency in the electronic ballast and the scheme is similar to the BFSK (Binary Frequency-Shift...
In wireless sensor networks, object tracking is one of the important topics in research of wireless sensor networks. However, the core technology of object tracking is the positioning technique. In recent years, many positioning methods have been proposed. The main purpose of this paper is to achieve an object tracking mechanism with low complexity of computation and low cost based on various constraints...
Underwater acoustic sensor networks typically comprised of sensor nodes that are deployed in sufficiently large numbers for data collection, monitoring and surveillance. Multi-hop relay transmission manner is used to deliver acquired data from sensor nodes to the sink node; nevertheless, hot spots around sink node will bring severe problems. In underwater sensor networks model of this paper, nodes...
In this paper, we present a Distributed Power Control algorithm with Multi-QoS Constraints (MQDPC) for WSNs (wireless sensor networks). Energy consumption, reliability and QoS provisioning are three key objectives in WSNs. In MQDPC algorithm, each sensor node independently builds its local maximum QoS topology according to the local information collected from its one-hop neighbors using MST (minimum...
In this paper, we present a Multi-QoS Optimization distributed Topology Control (MQOTC) algorithm for WSNs. Energy consumption, reliability and QoS provisioning are three key objectives in WSNs. In MQOTC algorithm, each sensor node independently builds its local maximum QoS topology according to the local information collected from its one-hop neighbors using MST (minimum spanning tree) scheme, therefore...
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