The Wireless Sensor Networks (WSNs), which is made up of a large number of sensor nodes, is a data-centric and self-organized distributed network. It is widely used in environmental monitoring, industrial automation, agricultural, medical and many other commercial applications. With the continued promotion and development of Internet of Things, as a core technology, the applications
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ZigBee developed by the ZigBee Alliance is a wireless communication technology based on the IEEE802.15.4protocol. It has the characteritics of low cost, low data rate, short distance, latency and high security. ZigBee has become a hot technology among wireless communications in short-distance and small amount of data transmission.Meter-reading by manual in residential area is the
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In electric power system, capacitive devices are one of the most important ones.They occupy about40%-50%of all the devices, and they always breakdown. If thesedevices fail, it can definitely affect the operation of the substation, and can even causecasualties. So it is necessary to monitor the insulation of these devices, and found thehidden problems in time
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Wireless sensor network is one of the emerging strategic industries in China.IPv6is the objective trend of the development of the next IP protocol generation. It hasabundant resources in address. And IPv6supports the automatic configuration of theaddress. Even, it has the advantages that it is high safety and mobility. The meaning isbroad if each wireless sensor
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ZigBee technology is usually used by automation and wireless control and its advantage is low speed, low power consuming and low price. IEEE802.15.4 define the protocol of PHY and MAC layer. ZigBee alliances define the protocol of network layer. The user can develop the application layer according to their need. Along with the ZigBee technology
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EPA standard has become a formal international standards, it provides a perfect platform and technical support for the development of China’s industrial Ethernet. Industrial Ethernet development process clearly indicates that closely follows the trend of technology, introduce the advanced technologies into industrial process, will greatly enhance productivity.As wireless sensor network technology’s rapid development, wireless access
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EPA standard has become a formal international standards, it provides a perfect platform and technical support for the development of China’s industrial Ethernet. Industrial Ethernet development process clearly indicates that closely follows the trend of technology, introduce the advanced technologies into industrial process, will greatly enhance productivity.As wireless sensor network technology’s rapid development, wireless access
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Nowadays, cable communication based on 485 bus and CAN bus is adopted widely in measuring and controlling system for greenhouse. But the cable communication manner has several disadvantages such as complex line, difficult maintenance and high cost. It is an effective method for solving the communication problems of greenhouse measuring and controlling system to utilize
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In recent years, the research of wireless sensor network gradually gets the focus from the industry and academe. It has a great application future in the military and civil area. Design of intelligent environmental monitoring system is one of the most active research fields in wireless sensor networks. Theoretical analysis and experimental researches of wireless
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With the environmtental requirement more and more high in some special fields,the real-time observation of the environmental parameters becomes a big problem.In this thesis,the corresponding realizable scheme is put forward to solve the problem in practice. This system,including the part of data collection in wire or wireless multi-channels,the main control platform of the embedded operaton
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