Study Of Vibration Signal Acquisition System Based On Wireless Sensor Network

Wireless sensor network is the current international concern,involving a high degree of multi-disciplinary cross,but a high concentration of cutting-edge hot research field.It combines sensors,embedded computers,modern network and wireless communication and distributed information processing technology,through various types of micro-sensors integrated collaborative environment or completion of the test objects of various real-time monitoring of information,perception, and acquisition, This information is sent wirelessly, and multi-hop network since the group is sent to the user terminal,in order to achieve the physical world, the computing world and human society, this triple world of connectivity.TopDisc algorithm main idea is the use of color theory to find the cluster head node tag; in which the degree of node-based algorithm LMA and LMN, GAF algorithm, TopDisc algorithm is the most common algorithms.In this thesis,a detailed study TopDisc algorithm and its improvement,improvement principle is power sensor nodes by setting the minimum threshold,the first node when the cluster threshold is less than the specified power range, the cluster head node will be in the R/10 search whether there is within the reserve margin above the set threshold,the node,then let some of the first node as a cluster,then the message is passed up until the focal point of the record of failure of convergence node cluster,when the convergence point of failure found that too many clusters, the message is broadcast to the whole network,the network instead of the cluster head node to the second focal point along the flow of the corresponding Spanning Tree convergence point.Improved stability has been enhanced to make the energy consumption is more balanced out.This paper is Study of vibration signal acquisition system based on wireless sensor network By building a Zigbee wireless sensor networks based on the vibration signal acquisition system.Focused on the sensor node hardware platform design and implementation of Zigbee technology and ARM design techniques based on vibration signal acquisition system, namely through the CC2430 module and MEMS accelerometer ADXL345 build wireless sensor network, through which the data transfer module, while control commands will be forwarded to the Zigbee LAN, the main process is induced by the acceleration sensor the size of the acceleration measuring point, using the serial SPI communication sent to the CC2430, and then from the chip to pass through the PC, wireless sensor networks, in order to achieve vibration signal test.