docRead avout the improvised wing rotor for an
download 
Report Transcription
Read avout the improvised wing rotor for an
INMARGYVER Award IMPROVISEDWINGROTORFORANAANDERAA CURRENTMETERUSEDASHEADINGDEVICE By ArturoCastellón1,Marcel.líFarrán2,JoanEsquius3,JoanJorba 1MarineTechnologyUnit.UTM.CSIC.Spain,2MarineScienceInsitute.ICM.CSIC. Spain,3InstitutdeCienciesdeMaterialsdeBarcelona.ICMAB.CSIC.Spain Duringageo-cruisewithR/VGarcíadelCidintheStraitof Gibraltar,in1989,aSideScanSonarwasusedwhencrossingthe straitNorth-South,andSouth-Northdirections. SideScanSonaronnewspapers Becausethestrongcurrentsthere,thebodyoftheSSSwas towedobliquelytotheshiptrackandwasimpossibletoprocess theinformation,atthistime,recordedinEPCthermalchart recorder. Forthefollowingcruise,thechiefscientistdecidedtousean Aanderaacurrentmeter(thiswithmagnetictape)attachedtothe mouthoftheSSSbody.Then,theinformationofthecurrentmeter compasswillprovidetheheadingoftheSSSandthenprocessing theinformationwillbe possible. Hedecidednottobringon boardtherotorofthe currentmeter(fig.1) consideringthattheimportant datawasthedirectionandthe compassofthecurrentmeter willprovidethat. Theproblemwasthat,on Aanderarotorcurrentmeter,if thereisnomovementofthe rotor(nomodulo),thereisno Fig1.Aanderaarotor INMARGYVER Award directionrecordedbecausethereisnovectoratall. Then,wehadtoimproviseawingrotor. Thebaseoftherotorcontainsamagnetthatinduceanother magnetinsidethecaseforcountingrevolutions(fig.2) Weusedacylindricalplasticcase,thoseusedforpackaging echosounderdrypaper(carbon paper)anddivideditinthree partsforthewingsoftherotorIn theimagespresentedweuseda CDplasticcase.(fig.3to5). Wesolderthethreewingswith thesameplastictoaplasticink ballpen(fig.6andfig.7).Theball ofthepenmadeeasytherotation oftheaxintheupperpart(fig.8). Thelowerneedle(fig.9)stacked inthepencapdidthesame functioninthelowerpartoftheax holdtotheAanderaaframe.(fig. 10andfig.11) Therotorturnsverywellwith Fig.2. nofriction.Weimaginethat underwater,thebuoyancyoftheplasticwillavoidthefrictionof thelowerpart. Themagnetwasattachedtothepenwithglueandtape(fig.12 andfig.13).Atthistimewehavenotthermoretractiletube. Becausetheonlydataneededwasthedirection,nomatterwhat currentthedevicemeasured,onlysomerotationoftherotorwas necessaryforgettingtheheadingoftheSSS.Unfortunatelywe havenopicturesofthesemomentbutwereproducetheprocess atthepresentforshowinghowwastheMacGyverade. Wesavedthecruise¡¡¡ Fig.3 Fig.4 INMARGYVER Award Fig.7 Fig.6 Fig.5 Fig.8 Fig.9 Fig.10 Fig.11 INMARGYVER Award Fig.12 Fig.13 INMARGYVER Award
