Mine Wireless Sensor Networks, Mobile Positioning Technology

In recent years, with the maturating of communication technology,embedded technology, semiconductor technology, microelectronics technologyand sensor technology, wireless sensor network(WSN) has obtained a rapidlydevelopment and application. WSN which is organized by lots of nodes thatintegrates sensors units, analog to digital conversion unit and processor unit,communication module was distributed in different positions, is able to monitormultiple target objects and collection data in real time. The node localizationtechnology which is one key support technology of WSN, has become the focusof WSN research.In this paper first the traditional WSN localization algorithms and itscharacteristics are analyzed and evaluation standards of WSN localizationalgorithm are introduced. Then the Monte Carlo Localization(MCL) algorithmand the Monte Carlo Anchor Box Localization(MCB) algorithm which is usedfor WSN node mobile localization are mainly been analyzed and compared, andshortcomings of two algorithm used in underground environment are points out.On this basis, having analyzed particularity of underground environment andmoving characteristics of mobile node in tunnel, the Center Monte-Carlolocalization (CMCL) algorithm is proposed in this paper. The CMCL algorithmwhich has decreased sampling area of anchor box of MCB algorithm by thecharacteristic of tunnel width, can improve success rate of sampling samplepoints, and improve positioning accuracy greatly.Finally, on base of above algorithm, a WSN location prototype system isdeveloped with CC2430/2431zigbee node and position experiment was carriedon. The experimental results show that the location system can meetlocalization requirement of simulation underground environment.