The Study Of Building Indoor Environment Monitoring System Based On Adaptive Energy-balanced Routing Algorithm Of WSN

With the development of wireless sensor network(WSN)technology,its application in indoor environment is becoming more and more extensive,and the indoor environment of the buildings occupies a large proportion in the daily work and life.Wireless sensor network applications in building environment monitoring and traditional outdoor application environment has very big difference,building indoor environment is multi-obstacle,and then movement of doors,windows and people makes the building indoor environment become a complex and dynamic environment.Traditional wireless sensor network routing algorithms do not consider the complexity and dynamics of indoor environment and perform not well when applied in building environment.The consumption of network energy is uneven in most current routing algorithms,some nodes die prematurely that cause the segmentation of network.The system will then loss the monitor in some regional environment and network life cycle.is reduced.In addition,the dynamic nature of the indoor environment also leads to the increase of the packet loss rate,the increase of data transmission delay and the decrease of data transmission stability in the wireless data transmission.In this thesis,an adaptive energy equalization routing algorithm based on building indoor environment is proposed to solve the problem of energy imbalance and short network life cycle in traditional indoor environment.The clustering and construction of the network are against the special indoor environment in this algorithm.At the same time,the characteristics of the dynamic change of the indoor environment of the building are considered which reduces the packet loss rate of data transmission,the data transmission delay and improves the reliability and stability of the building indoor environment data transmission.Firstly,various existing routing algorithms are analyzed and the shortcomings of these routing algorithms in the indoor application of buildings are introduced.As building indoor environment is dynamic and it is difficult to judge if the nodes can communicate according to the distance of nodes and calculate the energy consumption of the transmission,a clustering routing algorithm for network energy balance based on multiple attribute decision method for building indoor environment applications is proposed.The clustering and network establishment process of the algorithm are analyzed in detail,and compared with several common routing algorithms,it is verified that the algorithm has better network energy balance and longer network life cycle.Then,the overall design of environment monitoring platform were carried out,also with the hardware and software design.The design mainly includes the technical indicators of the data collected by the building environment monitoring,the technical indicators of the wireless data transmission and the overall network framework of the system.The hardware design includes the design of the hardware structure of the node,the circuit design of the controller and the RF module,the selection and circuit of the sensor design and other peripheral circuit design.The software design combines ZigBee technology,including the networking process of all kinds of nodes in the system and software design process and the software design of the PC monitoring.Finally,the integrated system is test and the test result is analyzed,including the verification of building indoor environment data acquisition,PC monitoring and system network energy balance,network life period,data packet loss rate and data transmission delay.