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1、第38卷第3期煤炭學報Vol.38No.32013年3月JOURNALOFCHINACOALSOCIETYMar.2013文章編號:0253-9993(2013)03-0522-07煤礦井下基于RSSI的加權質心定位算法1,2111韓東升,楊維,劉洋,張玉(1．北京交通大學電子信息工程學院,北京100044;2．華北電力大學電氣與電子工程學院,河北保定071003)摘要:針對基于無線傳感器網(wǎng)絡的礦井災害無線監(jiān)測信息系統(tǒng),提出了一種基于接收信號強度(RSSI)的加權質心定位算法。算法首先動態(tài)獲取路徑衰落指數(shù),然后通過加權質心算法計算出
2、自身位置。動態(tài)獲取路徑衰落指數(shù)實時計算了定位區(qū)域下的路徑損耗指數(shù),能夠準確反映巷道不同區(qū)域對信號衰落的影響,增強了測距算法對環(huán)境的適應能力。加權質心算法通過加權系數(shù)體現(xiàn)各參考節(jié)點對質心坐標決定權的大小,提高了定位精度。實驗測試表明,算法提高了定位精度,計算量小,定位流程簡單,適合用于煤礦井下環(huán)境。關鍵詞:加權質心算法;接收信號強度;煤礦井下;人員定位;無線傳感器網(wǎng)絡中圖分類號:TD676文獻標志碼:AAweightedcentroidlocalizationalgorithmbasedonreceivedsignalstrength
3、indicatorforundergroundcoalmine1,2111HANDong-sheng,YANGWei,LIUYang,ZHANGYu(1．SchoolofElectronicandInformationEngineering,BeijingJiaotongUniversity,Beijing100044,China;2．SchoolofElectricalandElectronicEngineering,NorthChinaElectricPowerUniversity,Baoding071003,China)Abs
4、tract:Aweightedcentroidlocalizationalgorithmbasedonreceivedsignalstrengthindicator(RSSI)wasproposedforundergroundminedisastermonitoringsystemwhichbasedonwirelesssensornetwork(WSN).Itfirstlyaccessedtothepathofdeclineindexdynamically,andthencalculateditsownlocationbyweig
5、htedcentroidalgorithm.Whenitac-cessedtothepathofdeclineindexdynamically,pathlossexponentwascalculatedinlocationareaswhichaccuratelyreflectstheaffectofthesignalfadingindifferenttunnelareasandenhancesadaptivecapacitytotheenvironmentofdistancedetectionalgorithm.Weightedce
6、ntroidalgorithmembodiestheimpactofeachreferencenodetothecentroidcoordinatebyweightedcoefficients,whichimprovestheaccuracyofpersonnellocalization.Theexperimentalresultsshowthattheproposedalgorithmachievesbetterpositioningaccuracywithsimplecalculationandprocess,whichdem-
7、onstratesitissuitableforcoalmineenvironment.Keywords:weightedcentroidalgorithm;receivedsignalstrengthindication;undergroundcoalmine;personnelloca-tion;wirelesssensornetwork煤礦井下工況環(huán)境十分復雜,有線監(jiān)控系統(tǒng)由于通信方式,建立礦井災害無線監(jiān)測信息系統(tǒng)可以對有自身的局限性難以對火災、溫度、風速、地壓、瓦斯、煤線監(jiān)控系統(tǒng)難以監(jiān)測的區(qū)域實施有效、實時和靈活的塵、礦塵等
8、對礦井安全生產(chǎn)具有重要影響的礦井環(huán)境監(jiān)測。無線傳感器網(wǎng)絡布點靈活,可根據(jù)煤礦井下實參數(shù)實施全面、有效的監(jiān)測,而且有線監(jiān)控系統(tǒng)難以際情況布置、更換和增加監(jiān)測點,能夠實現(xiàn)對井下區(qū)監(jiān)測到的區(qū)域往往是安全隱患最為突出的地方,這樣域的全覆蓋,彌
