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~~nas~~
<br />nnmole s+~e
<br />ec ro.,,, ` nc ro»,.
<br />swan __
<br />_ sw,m
<br />/ nun uaanm
<br />ns'.J3C n.+Ufe~~ ~ Eanrp 1J~--/GnMn
<br />I rnurlq„n l
<br />_~ MnJ•m~ -~ I 4oE m/ ~ f IUII
<br />lot--J I___ic~ ,/~ cnnln rnwn
<br />UMm G+mpnm N., I ri..,n iU. n rn,,,,n N onin vx•.ectm
<br />W.lI1 J.i.F W.,O Jn(1, CnLln
<br />*na c.,wn
<br />FIG. 12. NUMOD Real Time, Remotely Controlled TDR Data-Acquisition System
<br />'I~hc following cquipntcnl is Iuc:ucJ :u the cunlnd sitr with accts to a
<br />public telephone line. which in this arse Svcs 9011 km :ova v:
<br />• IISh1-rnngtalihlc rungnller ,vilh ('GA ul li(i/V V(iA numitul
<br />• Gxlcncd 1.'11(1-haul I-la}•cs-compatible "smart" modem
<br />• RS-2120 serial cable fur connecliu^ bet wren contpulet :unl uuulrm
<br />-! Aldutngh a lughcr bawd talc such ;a '_,4110 byk•s pct xamJ (bps) may be
<br />uxJ, the lower r:nc has been chosen dt miuindte data IranamiSSion errors
<br />because high line noise is oflrn encountered in rural areas.
<br />Since the Sy:}ICm i.c renulldy cuulrollrJ and upu:u"r unn0ende J. Svslem
<br />- power fur hulk cable Tesler ;nut moJCw nutst he Icfl on :II all limes. II powcl
<br />is turned off, nu ammuntic;lliu^ nr tlala acyuisiliun is possible. A positive
<br />:ISpeel of continual posvet is cunlinu:d healing. which prohibits eundern:d ion
<br />_ of nutiSlure. which way cause excassivr cnnusinn ;utJ Shutting. un the cif alit
<br />hua nls.
<br />Nearby lightening strikes may d:unagc the "I~UI( cable 4'sler ;nut modem
<br />clrcullrv d surge Suppression is nut Supplied lot bulb power and Irlephunc
<br />Inces. Willi such J:unagu amholiud personnel mull repo i+ the hardware al
<br />- the site. which not only inclcascs mainten:mce cu.Sl but resuhs in (Ie1ayS:m(I
<br />loss of data. Cvcn surge suppression Joc.a not eliminate the need fur lucll
<br />rcp;ur and stocking of spare bu:u (Is al a central luc;llinn. Lund repair, which
<br />is essentially bnarJ sv;giping, may he :I000ngtlishcd by pct.cunncl btmil:u
<br />with repair u! tt•Ilular ur qV clcctruuics.
<br />Itrquircd Soflwarc
<br />'hhc NUMOD Iclccunununicaliun protocol iucludcs Iwo components: utu-
<br />Jcm annmunic'alum ;nt(I data acquisition. Conuucrcially :IVailablc cum-
<br />nnmicalion Soflwarc (!'KOCOdl Al 1944) wax cmpluycJ During syctcm Jc_
<br />vclupntcnl and tcSliug, but any numlcm c'unnnunicali'+^ Soflwarc that permits
<br />.cc rial emm~unticalion is arlcqu:JC. 'ILe J;IIa-acquisition pl ugram (Sl'2.1Z
<br />1'1'111) with the SP212 serial digital intcl l;lec Joel nut suppul I nnJliple baud
<br />rates for mm~lem crnnnumicalinn. 'I~he cungtlrle nuulificaliull lul the Jata-
<br />:mquisition snflw•;trc is IislcJ in I lu:mg cl al. (1'1'11 ). 'I'o acquire "I'UIt w;tvc-
<br />funny via a modem :R 1,200 bps, the data-.ll-(I It ISIh OIt Sl1fh4;1rC fOr IISC w1U1
<br />flit SP212 serial digital interface required mollification for that model. The
<br />'I'cklronix (IcL•udl baud rate was 9,4110, which had lu be ch;wgcJ l0 1,200.
<br />1'hc currcm model (version L(19) does nut require This muddicalion as a
<br />1,2110 baud Irutsmission raft is now user sclcctablc without program mod-
<br />IflC;111011.
<br />Aflcr acquisition of lar),c :uuuunts of wavcfunn Jala with NUMOD,
<br />SignaUuc :m:Jysix is :I000nq,lishcJ vi;t NU'ISA. 'I'bis pmgt:uu :dluws visual
<br />comparison of up lu Ihrec, G10-m (2,000 fl) 'I-DR cable signatures with a
<br />digiliraliun (Icnsily of 251 samples per fool. II aulonutlically records the
<br />location, :unplilude, anJ wiJlh of user-identified refleelions fur subsequcnl
<br />:malyxis.
<br />Bulb NUMOIJ anJ NU'hSA programs arc available (rum either the U.S.
<br />14urcau of Mines in A4innc:q,olis, Minn., ur the Ucparlntcul of Civil Gn-
<br />I;iuccring al NullhwcSlcm Univ. (I luting cI al. 199}).
<br />APPENDIX II. REFERENCES
<br />Il:mcr, R. A., Uuwding, ('. IL, V:m Ruox ndaal, U..L, Mrhucrt, 14. 14., Su, M.
<br />I4_ O'Cunnul, K. M. (1991). "Application of lime dunmin u'llcctnntet ry to subei-
<br />dcncc nuatituring." l•7rud Rrp., rl.cci.ctrulre Agrrnnrnr Nu. 1IQS!-C%'G-0!5.17. U.S.
<br />Ih•pl of the Inlcnor, W:,chinglmt, U.C.
<br />Rr~nn. ll. R. h1., Ihunun, f_ ('..:uul I.in G. (1'1'17.). "liva hl alien :uul :m:Jysis of
<br />Icutcdml nlcasurs fur rallh-cln¢Imc d:uu age mitigation." hinu! lirp.. (/..S. lfu~
<br />rrnu of M1lu+cc C'unrrncr No..5027,SOSN, University of "hcnncsscc, Knoxvdlc,'I'cnn.
<br />Uuwding, C. I L, Su. M. 13., and O•Cunnor, K. M. (194R). "Principles of lime domain
<br />+rflrclomctry appheJ ^r mctsurc ntc nt of nu'k maw drfunnanun." /rlr. 1. Itnrk
<br />Alrrh. Alin..5'ri. Grnrnrrh. rt M1anurr, 25(S), 247-2'17.
<br />Uuwding, C. I L, Su. M. B., and O'Connor, K. M. (1949). "Mcnsurcutcnl of rocA
<br />mass deformation with grouted coaxial antenna cables." Rnrk A1ed1. and Rock
<br />l~:ngrg.. 22, I-23.
<br />"Geophysical luggutg of wilcliuc th dl hole al hcnm rd. vlMidcncc +cs•aleh silt."
<br />(1971)..Srr rirr Curururl No. !'UI /.f2G5. U.S. 1lurcau u(hlincs. M inncapulis, Minn.
<br />(ioaJman, R. li. (1949). /nrrndurtinn ro rnrk mrrhueicr, 2nd Gd., John Wiley C
<br />Suns, Ncw Ynrk, N.l'.
<br />Ilu;utg, I'. ('.. U'Cnnnul, K. M., Ymchak, U. M .:md UuwJiug, C. IL (19'11).
<br />"NUMOU tied NlfI .SA: xrl ova rc fur interactive aaluixilinn and analysis of Iiulc
<br />domain rc Ocetuntclry ntcasulcmm~ts." Info+nuvurr+ Crrndnr' 9.146. U.S. Ucparl-
<br />mcnl of the Inferior, Washington, 0.C.
<br />Ilu:mg, I'. C. (I'12i). "'fclrcauununlcannn enh:uu'u,mnl of lime domain rrflectunr
<br />coy uuawrcmunS." I'hU daiellalinn, Nwlhwcstcnl Univm sit y, fivanskm, III.
<br />Kint, M. I1. (1449). '•Ouantification of rock mast nllwcnunl with grouted arlsial
<br />cable," Mti thesis. Norlhweslcm Univc reify, Gvanslun, 111.
<br />Mchncrl. U. IS., \'an Rouscudanl, D. J., :uul Kawamura. N. (1792). "OvcrburJcn
<br />characleritatiun (ur heron road whsidcncc silt " hinnl Rrp. m U..S. Qurrn^ of
<br />Alinec, /'021.129,1, Illinois Slate Geological Survey, Champ;lign, III.
<br />I'ctcrsun, D. (1991). lnlrr nal tire. Syncnulc Canada, Lld., Gdmm~lon. Alberta,
<br />Canada.
<br />!'NUCOAIAI rrrciun 2.J rcfrrrncr nmrurul. (1946). UataSlunu'I'cchnulugicx, Colmm
<br />bia, Mo.
<br />.S!'2.12 host npplirminn program u.ccrguirlr. (1990). Tckln,nix, Inc.. Redmond. Oreg.
<br />Su. M. R. (1947). "Ou:ntl ificalion of c;lble deGttm:uiun wish lime domain reOec-
<br />Wwcuy Icchniyucs," I'hU Ui.wellatiun, Nulthwc>ICIn llnivcrsily, 1'vanston, III.
<br />li'iring .t vsn•rn.r proctor( rruuln,G. (1'1'11 ). Anislct lion., Inc, Skukic, III.
<br />~ 1.126 1427
<br />~ 1
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