Hydra automatic wireless telemetric system for water management and hydrology - January 8th, 1973

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Hydra automatic wireless telemetric system for water management and hydrology - January 8th, 1973

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Hydra automatic wireless telemetric system for water management and hydrology - January 8th, 1973
Parker, Garald G. (Garald Gordon), 1905-2000
Publication Date:
Physical Location:
Box 2

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Source Institution:
University of South Florida
Holding Location:
University of South Florida
Rights Management:
The University of South Florida Libraries believes that the Item is in the Public Domain under the laws of the United States, but a determination was not made as to its copyright status under the copyright laws of other countries. The Item may not be in the Public Domain under the laws of other countries.
Resource Identifier:
032968560 ( ALEPH )
891343127 ( OCLC )
G16-00683 ( USFLDC DOI )
g16.683 ( USFLDC Handle )

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,; ... ~ -... ..; ... "' tiC2 .61~ ' -~ . . t . ~~-;, ~ , ' .. . .Ii> ' } !/ , ! ••.• ~: .. , i .. . . t • E1~~8.!S~-~~ ang__J~-~ o~-9& I<. • i f,,/' 1,. "f .,,_ '>'1 V , T J lc.. l , +-' v ,-, "~ The telemetric. syster:~ is able to coll~ct information in a " . region with a radius of 50 km-s /31 miles/~ The different me~sw:• ing stati. on~ can be plaoed -according to their. ai.m -within , this area~ The measuring oente.r and tj.1e -mer 4 .auring statioJ;J.s are . oonn~ 0ted with each other by .radio transmitter-raceiverso The measuring p~ocess is :i,nitiatad by the measuring Qanter, giving through the oent.:cal r.,lclio stat ion a selective call. Having received this measuring orde. r the measu.ring proGe~s will be o~rried out at the .rel.avant meas1u~ing stat ion, and the result will.be sent back to the measuring cente~ by ;cadio, in a digital ' form~ The center e v':3-lUates the result and pr~ts it I automatioa.lly .. _ on a paper band, together with the. symbol of the relevant m easur-. / 1ng station an~ with. tb.e accurate time /rp:inut . e . , houl.'7 day, mo.th/ . . at which the1 :measu:!em.ent was carried out~ The j>.rinte.r can bs. rapl.ac,ad, if req~csted, by a t i3.:pe:r.-= ... .,,ch device., It ~s possible ~o set in the cente~ for each measuring ,station a n.on-desired value of the mea~ur.ing result~ In case . ' one of tho measuring stations sond6 a result whioh exoeds tbat proseh , value~ the measuring center gives automatiaal t"" ala??m signals~ . , Tho ~c -lemot~ing ~stem. is-doo~gned fo~ automati~ mode of ope rat-ion /without hutian c ontrol/ The mcasu .ring p.rogiam is fixed. in advanca /L,o. the sequence and frequency of calls/. Thcr measuring ccntc.,;1 however . , can' also be opo:r:ated in a -,, m~ual mode of opo~e.t ion-. Switc1hing ov_ar to this mode, a:tJ.y measur• ing station can b o _ yal~Jd by m aans of push bottoms and awitchas. T AO .'result of maasu~amon . t as well .. as al) ... othc: impo.r tant q.ata appo?,~ at the visual display unit du~ing-each measu.rement. i ,_ I • I Tho.-rQ.dio station. s a~e ope.rating with a o~.tiier frequency of 160 MHa~ Thcr infol'mation to cc t:ransmittcd consists of a--seiies of audio ~uls_e_s, modulating tbo ~arria" in frequeno1~


. . T}l.e outpu1i power is 10 W, put it can bo adjusted to the diffe~en~ applications. •. By now two ki)lds of S~llsers c.an be dGl ivered: water level meters ~nd ~ainfall mcto~s~ Thn water l evel meter ha s the following pninoiple ofcpe-, . ration-?leto.l e~actrodee isolutcd t.rom each other,. .are plaqad . . in the water verticnlly. The distance between tham isl cm. Each ot the. m is connected by wiz'es to an elect.ronio equipment. ' . The alaot;codos covered with wat'e r have a low .resistancc, the - • olcotrodas being ~bov0 the watJr level show a high rasistanoa. Tho -measuring order starts a pulse gene.rater the pulses of which a~e lad at, thG same time to. the elootrodos /ono by-one/ and to the output. ~ As soon ~ s a pulse. roaches a free electrode, the goncra~or. is stopped. Tu. this w ay the number .. of pulsos at the output cquuls tha water level in centimeters~ The measuring. aco uraoy is obviously. + l am • . ' -. The . rainfall .m~tc r it;J nsin. g also electrodes,. which ar-o covered by the' rain water~ The !!aill oorncs t •~ough tho usual recipient vcsse~ into a measuring oylider~ The clcotrod,os ~re built in vcrticnlly into tbc. c ylinder~ R eceiving a oa+l the sama measuring proccdu;o sto.r t s e s ::1bovc 1 on l y 0 1 111 pulse oorresponds ,, . . to 1 mm ~ainfo.11 .. Th e cylinder. can r e ceive 100 mm rainfall. Whan the level goes over 90 :ru:a, th, ~ n the ap~aratus evacuates it self au_ t omat iQi!."'7 u sl.!}g .an eleotromo.gnct ic value., after the --next measuring p.rooess . Tho r e sult of the aotual measurement ,/ can be obtnir).cd by subtracting the p.r _ovious result from the , actua l value. Thero i. s an .obsc;cving oucuit which offe~ .ts that tho apparq.tus answers on} _ Y if mo;a t r.i.an 015 mm rainfall was •.reooivcd in the meq.Ilt ime 1hc p .owc.r consumption can ba kept to , : a minim •um this way. For the purpose of checking it is possible ~o call. /m~uall? / in a coclcd form ___ the rainfall m~as~ing stat.ion at any tit1e ~ Raving rco0ivcd the ,coded cail the appar.atus will answe!C indapendqntly of the .rain. The ma-asu.r,ing ac~uraoy is + l mm rainfall. ~ -


I . • :,, The frequency' of measureme .nts is, for example _ in a syate~ . . \ w1th 5 ta~fall-and 5 wate~ level measuiing stations, e vsry 12 minutes, eaoh ~ainfall stat ion and eve . cy hour eaoh wate~ le:vel station~ The measur:Lng stations can be s~pplied as well fl!om t-he mains /220 V/ as :from batte:1\Y /12 V/" Obviously any sanser oan be connected to the telem~tfj.o . . , system, which gives the measured value in the form o:e d -~o~ pulses, -the numb.er of which co.J:?-responds to the value. Both the Qenter and the measuring stations are :fUll;y transistorized~ \ I


/ ' I Having proved that the Hyclra teiemetrio system is oolleot automatioly withou. t cables information ion different - • • • . . . . I . ' ' hydrologio -meteorologic measu.:. 'ed values i.n a regi~n ~ . t approximatively 50 kiiotaeters, and to ,giv~ alarm signals , if the measured val~e is .higher_ shan a cermin preset value, we pla.n to apply the system in the followi.ng main dire~t. i o,?ss a.,/ waterman.ageing ,and op. 6:catio.ti 4ir6otirig. systems, :b.,/ flo~d-warning .systems, c./ ir-rigation systems'. . :crnder section a ~.; a conc.rste application of the telems.trio sys~em is .bsing ple.nned. for the Atale.r catchmsnt area •. This , \ . . system aims t o prcmote both the fload control and the / . . .l'lageme,nt Of WaJGErr re soUr06S syst6IDS~ . U.nder section b0 / a rsgionat flo: od-warni.nf; network is consideration, which wov.ld consist of sight local tE.l~metrio . ~ystGms -situ.a ted in the mcst rainy-. area s of .the reg~ol'l. .. co-opera ting with each othGr a.nd signaling any irregular b6ha vior of any --stream observed. to_ . the main_ center• un.dGr se~tion c~./ the. irr~.ga tion system of the 2 nd barrage . . of the riv-er Ti:sza could be operatcd by th use of tn~ Hydra tale.metric ~ystem •. , . . I


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