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The ZigBee technology based on IEEE 802.15.4 is widespread use of biomedical applications providing wireless networks. A fully integrated low-power 2.4GHz ZigBee transceiver implemented in CMOS technology is demonstrated. It has RF and analog front-ends, a frequency synthesizer, and digital modulator and demodulator compliant to IEEE 802.15.4. The direct-modulation using fractional-N synthesizer is...
This work investigates whether a contactless, wireless underwater coupling could be developed for underwater sensor networks. This requires the wireless transmission of power from the sensor hub to the transducer module, and the two-way wireless data communication between hub and transducer. Results from a trial deployment of systems with conventional waterproof couplings show that these are a major...
This work focuses on the properties of received signal strength indication (RSSI) of ZigBee wireless sensor network, which can be used to implement indoor location system. The study collects a set of measurement samples in a closed room from an implementation of indoor localization application based on ZigBee Cluster Library (ZCL) framework. The measurement data are analyzed for their statistical...
Power distribution system is one of the important parts of smart grid. Due to its large scale, only a small part in power distribution system employs optical fiber infrastructure. In this paper, we propose an architecture of hybrid short distance RF and wide band communication. We analyze why these two technologies complementary well in power distribution level. We summarized three short distance...
Wireless Sensor Networks (WSN) are used in various fields with the purpose of establishing low cost network for data exchange. An important aspect in ZigBee WSN study is the reduction of node power consumption in order to reduce the overall power consumption of a network and to reduce the induced CO2 emissions. One approach in power consumption reduction is the Adaptive Transmission Power Control...
In Intelligent Space, the paper was successfully constructed using ZigBee wireless sensor networks intelligent systems, and the corresponding software and hardware design. The system uses star topology network.The information is collected on each node (such as temperature, humidity, light intensity, etc) integration, he central node accords corresponding information to take automatically intelligent...
Nursery sheds have the characteristics of staying closely, quantity, parameter changing slowly, a small amount of data, so the article presents a distributed centralized monitoring system based on a short-range radio transceiver IA4421 chip. The front-end system circuit choose single-chip STC89LE52RC as the control of the core, complete a humidity sensor HS1101, the temperature sensor DS18B20 circuit...
In this paper, we conceive and develop a prototype of a car parking management system. The system gives a real-time snapshot of the monitored parking equipped by a Wireless Sensor Network (WSN). The developed application consists of two parts; one embedded in sensor nodes and another one executed at the pc containing interfaces. Moreover, this system enables to develop a Web application which allows...
In recent years, the phenomenon of global warming has become increasingly serious, resulting from human factors such as excessive increases of human and environmental pollution and gas emissions and depletion of natural resources. According to research, global warming leads to desertification, drought, reduction of rainfall and the crisis of a lack of fresh water. Due to the continual growth of the...
This article describes the toxic, flammable software and hardware design methods of gases wireless monitoring network nodes based on sensor array. By collecting signals with gases sensors and receiving and emitting data with wireless sensors network, we can measure the gas concentrations. We describe the toxic and flammable gas concentration measuring circuit and illustrate the theory. We choose the...
A technique of linear networking utilizing Zigbee wireless sensor network is introduced in this paper, which applies the wireless sensor network, usually used in short-distance area network group, to long-distant monitoring system. The designed linear network group, combined with relaying networking method under traditional communication mode, brings about the linear networking of multiple network...
This paper designed and implemented a WSN monitoring system for grain depot based on XBee/XBee Pro module. It is accomplished by OEM module XBee/XBee Pro, which integrates wireless RF chip and Zigbee protocol stack. Characterized by simple hardware interface, self-organized mesh network and AT commands, this system can monitor temperature and humidity in the grain depot with stable performance including...
Based on analysis of features of ZigBee Wireless sensor networks and RFID technology, we implemented a protocol stack of ZigBee using method of module dividing. From the perspective of improving teaching methods, combining teaching practices, a teacher-student interaction system based on ZigBee and RFID technology was designed and implemented for the application of actual teaching. Results show that...
This paper describes the CC2430 ZigBee chip used In the design of photovoltaic power generation system, specifically is to TI's CC2430 ZigBee chip implanted into the photovoltaic power generation system, take advantage of CC2430 features in the single-chip computer to achieve the photovoltaic solar panel system, voltage, current, temperature, light intensity and the voltage inverter, current, and...
Develops a gas leak detection and location system for the production safety in Petrochemical Industry. The system is based on Wireless Sensor Networks (WSN), it can collect the data of monitoring sites wirelessly and sent to the computer to update values in the location software. Consequently, it can give a real-time detective of the potential risk area, collect the data of a leak accident and locate...
Wireless Sensor Networks (WSN) are nowadays widely used in monitoring and tracking applications. This paper presents the feasibility of using Wireless Sensor Networks in active control for reducing low-frequency noise inside car interiors. This work presents the design of a WSN for active control law, from global specifications to hardware architecture of node with evaluation of the network performances...
The goal of the work is to investigate the Radio Frequency (RF) propagation of ZigBee devices operating within a hospital environment to analyze their real indoor behaviour to design healthcare systems. Different Received Signal Strength Inidcation (RSSI) measurement campaigns have been carried out to characterize the main propagation features. On the basis of the experimental results it has been...
A system of wireless Smart home sensor network based on ZigBee technology was proposed in this paper. A common control unit and binding idea are used in design of this system, which improves the development efficiency and makes it easy to expand and upgrade various functions. The proposed system has high availability and reliability. It could meet the requirements of daily life such as the control...
This paper deals with global power consumption modeling dedicated to Wireless Sensor Network (WSN) nodes. After having introduced various existing approaches for the energy modeling, our choices and experiments using the Ns-2 simulator and the iMote2 hardware platform (over an IEEE 802.15.4 protocol) are presented. First results show that Ns-2 simulator provides RF energy consumption metrics very...
Typical ZigBee location applications consume significant amounts of power when end devices receive messages for configuration and synchronization. These intervals often consume more power than the transmission process reducing significantly the devices battery life time. This paper describes an implemented ZigBee low power consumption location protocol, achieved by reducing end devices communication...
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