The method of firefighters real-time locating based on RFID Xiaohui Zeng1, a, Jianhua Jiang2, bbaoyong Cheng3,c

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1 d Ittol Cof o Mh, Mtls d Ifomto holog ppltos ICMMI 05 h mthod of ffghts l-tm lotg sd o RFID Xohu Zg,, Jhu Jg, BoYog Chg, Ntol sttut of duto, NChg sttut of S & holog, NChg, 008, Ch Ntol sttut of duto, NChg sttut of S & holog, NChg, 008, Ch Ntol sttut of duto, NChg sttut of S & holog, NChg, 008, Ch ml: 007_mst@6.om, ml: @qq.om, @qq.om Kwods: postog;rg;rssi;coodt stmt;f;of;rfid stt. hs pp poposs fm postog mthod sd o RFID tholog, whh omd RSSI d OF gg utomt postog ffghts. Wh th sstm 't msu th dst du to vous sos, t wll stmt th tgt loto of th ut sd o hstol dt. h pmtl sults show tht th mthod posto tgts qukl d utl. So t usd fghts postog fo th f. Itoduto I t s, du to th s of lt pow, th um of f dsst lso psts th td of sd, d th fm sft dts lso sd. I od to su th sft of ffghts, postog fm th f hs om mpott gut to pott th sft of ffghts []. h WSN, GPS, th otto of ZIGBEE, d, WIFI d llul twoks tdtol o-vsul postog mthods. h hv lot of shotomgs, suh s hgh ost, lk of ptl d th pso of postog[-6]. RFID tholog hs lots of dvtgs, suh s th lg g of tsmsso, hgh postog u, ovt stllto, low ost d so o. I f vomts, t hs ovous dvtg. I ths pp, t poposs fm postog mthod sd o RFID tholog, whh omd RSSI d OF gg utomt postog ffghts[7]. Wh th sstm s l to ot tgt loto fomto, t dtm th tgt loto usg th lst squ mthod. I th poss of opto, f th gg fld osoll, t wll stmt th loto of th ojt usg th tjto fttg sd o th pvous dt loto. h sptl th-dmsol oodts ssumg tht th svl f ods th th-dmsol sp, P,,,P,,, P,,, movg th-dmsol sp oodts of msug pots P,,, d th dst tw th f od to th mol od s d, d,...,d sptvl. h t stlsh spf,, d th f od,, d th sptv dst tw qutos sd o th th dmsol sp d dst fomul.,, d d d 05. h uthos - Pulshd tlts Pss 799

2 Suppos d,th sutt th hd quto fom th fo quto tp,d gt th Nohomogous l qutos th smplf : Mk tp wtt mt fom: h offt mt s: , d th ukow vtos s :, h podut s:. Fo ukow mol tgt postog polm s ovtd to th ov sstm of l qutos to solv th polm. Ol wh th mt vsl, th soluto of qutos s. I od to gt th ol su oodts X, ou wll d to mt R,, tht ms th tp t lst hs fou ls. ht s to s, to solv th ukow tgt loto th d vomt oodt, w d to st up t lst fou f ods th sm pl to dtm th oodts. But pt, us th msumt vomt s ot dl, th wll t o g. hs wll ld to fou fo msug pot s th t, dst to th f od s spf fo th dus of th ll ot tst fo t. d th poss of tul msumt, th tf d ostls oft pp ll sots of qupmt. hs wll ld to th pdg pot of f fo th mol od 't v ll fomto, whh wll ld to tp th uddtmd d 't lot th tgt. hfo, ud oml umsts, wh do fm postog, t wll st svl f ods, mk th tp fo th ovdtmd qutos [8-0]. Wh th tp om ovdtmd qutos, th soluto of qutos s ot pst. ht wll mk th sum of th squs J of th o vto mod ˆ to th mmum. Wh th J tks th mmum, th soluto s lld th lst squs soluto LS ˆ. Fom th sgf of th lst squs, w kow tht th lst-squs soluto s uqu, ts psso s: LS ˆ 4 Estmt th sttous oodts of th ud tst movg tgt I th poss of tul f, th f ods dttd th mol ods wll lss th 4. t ths pot tp s ud dtmd, th sstm ould't gt th ud tst movg tgt oodts. But tul f su, s sult of vomtl mpt, th spd of fm th f s't ptull fst, d ffghts gl movg s fst s possl. t th sm tm, th movg tgt postog oft ptd. odgl, wh t 't lotd, w st up th tgt tjto modl odg to th sults of pvous tgt postog th 800

3 loto of th tjto. h us th modl to ft out th ut tm tgt loto oodts [0-]. h movmt of fm th f gdd s ufom o vl moto svl postog tms. Wh th sstm tgt flu, w us pvous moto spd, postog tm tvl d momt fo th tgt loto fomto to stmt th tgt loto oodts t th ut momt. Suppos th sstm postog fo, d th oodts of th gols h of th postog tm t 0,t,,t -,t,t, s 0, 0, 0,,,,, -, -, -,,,,,,, sptvl. h vluto t of th gol th tm t -,t,,, wth,, s dto s: v v v 5 If th sstm lot flu t th tm t, d postog suss t th tm t -5,t -,t s l to us th vg spd of tm t -5,t - s th movmt spd of tm t -,t. d gt th tgt vlot ompot of tm t -,t log th s dto: ~ v v v v4 v v 4 6 Smll w wok out th dto vlot ompot v ~, v~ of tm t -,t log th s d s. Postult tht th movg tgt oodts s -, -, - t th tm t -, th w lult th movg tgts tm t oodts s follows: ~ v, ~ v, ~,, v 7 h pmtl sults d lss h smulto pmt out th movmt of th ffghts s t gul spd th 5 * 65 m doo. Bus of th pmtl odtos, th mol od to msud d th f od vomt t th sm hootl pl. s sult, th d oodts dgdd to two oodts t ths pot, d th qud um of f ods to th loto should du to. I th sm hootl pl, to 0 m dto fo th s, 60 m fo th dto, stlsh o ght gl oodt sstm. Slt th oodt sstm th fst qudt of 0 dom oodts to th f od. h f ods 70,90, 80,680, 00,0, 4470,440, 550,440, 650,870, 7540,570, 8640,60, 9880,50, 0000,680 sptvl. Ud tst tgt oughl log th dto, th postog tvl s 500 ms, d od v momt tgt's tul loto. Bus th m som os wh postog d msumt oodts, wh postog pt, movg tgt's tul oodts s dfd s th tul msud vlus wth dom o tw 0 ~ 50 m. W dtt t lst th f ods t v momt th doo sktll outs, so w wll shut dow th f od dtto t th postog momt of 8,,6,9,4,9 tfll. d stmt th oodts usg th postog dt tht suss of tgt loto t fom fou tms. Compd th movg tgts ud tul oodts wth postog o stmt oodts of th sstm, suh s. 80

4 l th ompso sults of tul oodts d movg tgt postog sstm o stmt th oodts tm tul oodts Estmt th oodts Dvto tm tul oodts Estmt th oodts Dvto,50 94, ,66 596, ,47 0, ,444 7, ,686 94, ,690 79, ,870 44, , , ,058 48, , , ,5 569, ,454, ,4 709, ,4474 8, , , , , , , ,484, ,048 05, ,5070 5, ,84 8, ,584 66, ,48 6, , , ,60 4, , , ,86 407, ,5850 9, ,090 54, , , Fom tl w s tht movg tgt's tul oodts d sstm dfd oodt oth hv hgh u whth sstm stmt o th oodt msumt. ll th osvto tm, th sstm mmum o s smll s 5 m, th mmum o s lss th 65 m, vg o s ol 47 m, o wth th ptl g. Coluso hs pp poposs fm postog mthod sd o RFID tholog, whh omd RSSI d OF gg utomt postog ffghts. Wh th sstm lot, t dtms tgt l-tm oodts wth th lst squ mthod sttg th dudt f od. Wh th sstm ot lot, t dtms th tgt oodts usg th pvous tgt oodts d tjto fttg mthod. B lg th pmtl sults, t foud tht th mthod postog l tm d utl. h mthod hs tt pfom pso, omputg spd d postog ost. hfo, th sstm hs t gg us vlu, d t ppld f ffghts postog fftvl. Rfs [] Wg Shouhu, Cg Xo L, h-hug kuo, Mg Fku. w mthod of ffghts postog [J]. Joul of fomto s d tholog of Ch, 0, 0 : [] L Wfg. h sh of doo lolto sd o RFID tholog [D]. Mst's dg thss. Shgh jotog uvst

5 [] Wg Yl. h sh d pplto of doo lotg mthod sd o RFID [D]. Mst's dg thss. X uvst of s d tholog, 00. [4] Zho Gg, Lu Hogwu, Yg Guow, Sog Goju. Sp pttog vtul gd of RFID doo lolto lgothm [J]. Comput sstm pplto, 0, : [5] L Ku, Lu Zhg, Ch Xug. Ffghts postog sd o RFID [J]. Joul of ltos, 05 : 45 [6]Yu-HugL,Mg-Ygs.DRFIDSttstSstmUsgSphlN-Fldt MsumtChm[J].tsdPopgto,0,6:6-70 [7] Hug odog, Lu Xod, Dg Zhomg. RSSI d OF gg tholog d smulto stud [J]. Joul of vl outl gg sttut, 0, 7 5 : [8] Bo jju, Huo Zhlog, Xu Hu t. hgh pso wlss m psol postog lgothm [J]. Joul of dustl utomto, 009, 5 0 : 8 to. [9] L Jg. h sh of FID doo th-dmsol lolto lgothm [D]. Uvst of lto s d tholog. 0. [0] Xu Suhog, Zhg Dogg, Sh Quog t. h stud of movg tgt ut postog dptv flt lgothm [J]. Joul of mssls d gudd joul, 00, : 5-7. [] L Zhgdog, Zhg Kf, Bo Jju. Udgoud movg tgt postog mthod sd o dst msumt tholog [J]. Joul of dustl utomto, 05 4 : 9-. [] Ch jo,ch W, Lu Xo, Gu WL. h stud of GPSO vgto d posto lultd sd lolto lgothm [J]. Comput d dgtl gg, 0 : 6 to 8 80