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Remote image monitoring system should have the characteristics of capturing, compressing and network transmissing video real-time[1]. Remote image monitoring system based on embedded Linux and OMAP3530 can achieve these functions well. In this system, we use B/S model. It can be divided into two parts, server and browser The first component is to capture video through the analog camera, compress the...
As power is applied more and more widely, the user on the efficiency of power supply, the volume, reliability, put forward higher request, using the traditional single-ended forward converter will be difficult to meet this requirement. Active clamp forward converter has many advantages. It allows wider input voltage range or higher turns ratio and offers higher efficiency and lower noise. It is widely...
In this paper, the nominal formula Mg2(SixAl1-x)O4-δ (x≤0.2) ceramics were synthesized by traditional solid phase reaction methods, and the phase evolution and microstructures of that were investigated by XRD and SEM. The testing results of XRD and SEM show that by substitution of Al for Si in the B site of Mg2SiO4, the MgSiO3 secondary phase can be suppressed, whereas the secondary phase of MgAl2...
Wireless sensor networks are important development direction of current sensor technology. Power consumption is the key factor for the nodes longevity in practice. This paper introduces the design of a small scale self-organized sensor networks based on fire monitoring. The system consists of sensor node and routing protocol. The network tested experiment proves the feasibility of the routing protocol.
The technology of MD multicasting and its application on E-Government MPLS VPN are studied. MD can easily be implemented on E-Government MPLS network. Using MD multicasting method, every site on PE belongs to the same VPN is added to one multicasting domain; these sites can send and receive packets across service provider network. The realization of MD multicasting is only little changes on the original...
This paper introduces the design of magnetic field sensor remote nodes based on wireless sensors net, which have been used in magnetic measuring system. The node circuit consists of nRF9E5 single-chip RF transceiver and AMR sensor IC; operating frequency is 866MHz, max RF output power is +10dBm, receive sensitivity hits - 105dBm, data transmission rates up to 100kb/s
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