professionalSURVEYING INSTRUMENTThe good faith for thisTheodoliteisakindofAnglemeasuringinstrument,itisequippedwithatelescope,thehorizontalcircleandreadingsoftheindex,theverticalscaleandindexofreading. Theodoliteiswestsen(Sisson)bythemechanicaboutfirstdevelopedin1730,afterformingtheimprovement,theformalusedinBritishgeodesy. In1904,Germanybegantoproduceglassdialtheodolite.Withthedevelopmentofelectronictechnology,the60selectronictheodolite.Onthisbasis,the70smadetheelectronicmeasuringinstrument.

Prism,akindofbybothtwointersecteachotherunparallelplaneoftransparentobjects,tolightordispersioninthebeam. Prismisthetransparentmaterial,suchasglass,crystal,etc.)madeofsolid.Itiswidelyusedinopticalinstruments.Prismaccordingtoitsnatureandpurposecanbedividedintoseveralkinds. Inthespectruminstrument,forexample,thecompositelightisdecomposedintospectraldispersionprism,iscommonlyusedisequilateralprism;Atperiscope,binocularsandotherinstrumentsinthechangeindirectionofthelight,

Insidedish Isclosetothecompasscanoutsidetherotatingdisk.Insidedishsurfacewithmanyconcentriccircle,acircleiscalledalayer.Eachlayerisdividedintodifferentslices,somemorelayergrid,somelesslayergrid,theleastonlydividedintoeight,alayerofthreehundredandeighty-four,mostofthegrid.Eachdifferentcharactersareprintedonthegrid.LuoPanyoumanytypes,layernumberofsomemore,someless,mostofthe50secondfloor,aminimumoffivelayers.[5]

Intheprocessofengineeringconstruction,especiallytherailways,highways,Bridgesandconstructionofmining,constructionandotherindustries,distancemeasurementisanindispensablestep. Becauseonlymeasuredthedistanceofanaccuratedata,toensurethattherewillbenodeviationinconstruction. Inallkindsofdistancemeasurementtools,electronictheodoliteisakindofdistancemeasurementtoolsareoftenused.Classificationisoneofthetheodolite,itisakindofAnglemeasurementtoolbyphotoelectrictechnology,

combininghuman-machineinteractivevisualinterpretation,andthedynamicchangeofwetlandmonitoringonthecoastline. Accordingtohistoricaldata,regionalplanning,suchasdata,carriesonthecurrentdataandhistoricaldataofcomparativeanalysis, trendsandchanges,fordifferenttimemonitoringthetargetimagechanges(areacorridorlineofchange,change,functionchange,Marineenvironmentalconditions,etc.);

suchaslongjumpabovetheinstrumentfurtherafield. Restrictedtelescope,togetherwiththeverticalplatearoundthehorizontalaxisintheshift,thecollimationaxisoftelescopeshallbethehorizontalaxisorthogonal, horizontalaxisshouldbethroughthedescriptionofwaterdish.Sightingofanumberline(sightingaxis)intoinstrumentswithinthebaseofthecollar,sightingdepartmentmaymakelevelchange.

itshouldbenotedthataslongasthescrewbrakeitscorrespondingtosmalladjustment. Inaddition,theopticalviaopticaltoimplement,toseeinatheodoliteitcanmaketheinstrumentaccuracy.Theinstrumentisalsoequippedwiththeleveloftheinstrument,itisoneoftheimportantadjuvantjinweiinstrumentonthedevice. Theodolitemethodusingatripodforthelengthandheight,theappropriateoperatorswillinstrumentfixedonatripod,theinstrumentbasesurfaceparalleltothetopofthetripod.Putinstrumentdanceonthetestsite,

Ameasuringinstrumentisameasuringobjectfactorsassociatedwithequipment,theequipmentisinuseprocessisnotentirelyaccurate, duetovariousfactorsaffectthestatusoftheinevitableerror,therestofthisarticleaboutlengthmeasuringinstrumentsinuseasfaraspossibleavoiderrorsofmeasureswereintroducedsimply. Firstneedtoensurethatthemeasuringinstrumenttomeasurethetemperaturestabilityofthesurroundingenvironment.