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Established a wireless sensor networks and a concrete plan is brought forward based On ZigBee technology. Corrected the time of network by Time Protocol. The hardware and software of the system is designed. Finally, the application effects of the system are analyzed and compared. The System realized the goals such as low cost, low consumption, high stability, high flexibility and expansibility. The...
Xiang Lia Load-balancing Clustering Algorithm of WSN for Data Gathering (LCA-DG) is proposed based on load equalization. The LCA-DG uses the comprehensive weight value that composed of two factors, that distance between head and members and residual energy, to improve cluster members choice strategy for balancing load of each bunch, and uses optimization threshold value and receiving threshold value...
Aiming at the shortage of network source consumption and load balance in traditional shared tree multicast algorithm, this paper takes the network coding into account and puts forward a new shared tree multicast route protocol based on network coding. This algorithm adopts the method of minimum link consumption to select the node, and realizes the data transfer from multi-source nodes to multi-destination...
As one of the wireless communication technology, Ultra-Wide Ban(UWB) technology will be applied more in position in future for its advantage of high-speed, low-cost and low-power. The paper introduce the basic concept of UWB technology and the thing of domestic and foreign study. the current situations and problems of the emergency materials warehouse is analyzed. the paper put forward the assumption...
The received signal strength indication is usually used to measure the distance between two nodes. There are random errors and outliers in the received signal strength indication. In order to overcome the two ranging error on the positioning accuracy of localized nodes in wireless sensor network. In this paper, the characteristic of the analysis of two errors is proposed based on a weighted value...
In order to solve environmental parameters monitoring problem of the individual small-scale greenhouse in Hanzhong area. The article provides a design of wireless greenhouse environment monitoring system based on ZigBee technology. The system uses SPCE3200 microcontroller as the core composition of data processing and monitoring terminals, it can control the CC2420 wireless data transceiver modules,...
In this paper, a multi-interface Wi-Fi node for Wireless Sensor Network (WSN) is constructed. Wi-Fi is connected through SPI (Serial Peripheral Interface Bus) to form the relatively energy saving wireless transmission. Along with other interfaces, the multi-interface function requirements are satisfied. Firstly, the overall module design framework is introduced, followed by the hardware and software...
In allusion to the current developing situation and shortcoming of transmission lin aeolian vibration monitoring. a transmission lin aeolian vibration monitoring system is designed based on CC2430 for wireless transmission, the design scheme and architecture are introduced. The emphasis of design is the system hardware circuit including sensor module, signal processing, filtering and amplifier module,...
Aimed at control automation and unmanned manage systems which are located in open country, field and orchard have difficult in putting wire, a wireless data communication system was designed. Wireless radio frequency technology was used as transmission interface in this system, STC89C52 micro control unit(MCU) was used as major controller and logic processer, wireless radio frequency chip CC1101 was...
Pressure was important measuring and controlling technical parameter during industrial production process. In order to operate industrial production well, pressure should be accurately measured and controlled. This system's wireless pressure transmitter module was composed of pressure sensor PTB203, A/D converter ADC0804, MCU STC89C52, wireless communication module CC1101 while receiver module was...
according to study the a Maximal Lifetime with Constrained Energy problem (MLCE)in a sensors net, we discuss the bound of the option value of mix integer program (MIP). Since the Maximun of the MIP is NP complete problem, so the exact solution can not be obtained, but the bound of the option value is exist. This paper use Lagrangian relaxation method to derive theoretical upper bound on the optimal...
According to the greenhouse environment of the application needs,design of the thesis is about a greenhouse environment monitoring system. The wireless monitoring network system includes temperature gathering module and the wireless transmission module. Sensor nodes and the wireless transceiver module use core microprocessors of cc2430, to build wireless sensor networks based on ZigBee protocol. The...
The task process model is a very important part in wireless sensor-actuator network. Node types and task classification of wireless sensor-actuator network are introduced. The theory and the process of the task process method are analyzed and the specific task process of all kinds of nodes are researched.
The exorbitant gaseous carbon dioxide (CO2) content does cuase hazard to the environment, animals, plants and human health. This paper explores the Wireless Sensor Networks (WSN) combined with carbon dioxide gas sensor for testing the content of carbon dioxide gas in environment. This system can be applied to the forest, mine, green house and indoor environment whose circumstances are unattended....
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