 network to improve how users perceive performance of the communication channel; such improved perception may increase user consumption of content through the communication channel, increasing revenue to the system. 1. Technical Field
Aspects of this document relate generally to cranes. More specific implementations involve davit cranes and gantry cranes.
2. Background Art
Cranes are used in many industries for a variety of applications. Typically, a crane is used to hold, lift, or lower a load and/or to move the load to another location. Various types of cranes exist, such as overhead or bridge cranes, mobile (such as truck-mounted) cranes, side-lift cranes, rough terrain cranes, all terrain cranes, pick and carry cranes, carry deck cranes, crawler cranes, railroad cranes, and the like. Many cranes operate with a winch and/or with a wire, rope, chain or other device which sits in a sheave or other loop or device for lowering or lifting a load. Proximity sensors or detectors of the foregoing type typically use radio frequency (RF) or infrared (IR) transmitters and receivers facing in a common direction so that RF or IR energy emitted by the transmitter is reflected back to the receiver when an object is present proximate the detector. Conventional systems of this type relying on energy from the source being reflected back to the receiver and measured then compare that measurement, either analog or digital, to a reference value. The results of that comparison are then used to determine if an object is within the detector's range or not. In some designs the reference value is altered slightly and the measurements repeated in an attempt to ensure that there is indeed an object present.
The infrared and RF spectrums are becoming quite noisy with either intentional or unintentional radiators. These signals can interfere with existing detection systems and cause false interpretations. That is, a signal received by the receiver from an energy source outside the detector may be interpreted by the detector as a reflection of energy emitted by the transmitter, resulting in a false-positive reading indicative of the presence of an object proximate the detector when in fact no such object is present.
It is therefore desirable to provide a proximity detector that minimizes the chances of a random detection. Applicant has developed the system and method detailed herein below to more reliably detect an object regardless of the extraneous signals from other sources and changing ambient conditions. Transmission of information by the use of light over optical fibers is widely used in long-haul
network to improve how users perceive performance of the communication distribution channel; such improved percept may increase user consumption of content through the communication duct, increasing revenue to the organization. 1. Technical Field 
 Aspects of this text file relate generally to cranes. More specific implementations involve davit crane and gantry cranes. 
 2. Background Art 
 Cranes are use in many diligence for a variety of applications. Typically, a crane is used to hold, aerodynamic lift, or lower a load and/or to move the warhead to another location. Various types of cranes exist, such as overhead or bridge crane, mobile (such as truck - mounted) cranes, side - lift crane, rough terrain cranes, all terrain cranes, pick and carry crane, post deck cranes, crawler cranes, railroad cranes, and the like. Many cranes function with a winch and/or with a wire, rope, range or early device which sits in a sheave or other loop or device for lowering or pilfer a load. Proximity sensors or detectors of the foregoing character typically use radio frequency (RF) or infrared (IR) transmitters and receivers facing in a common direction so that RF or IR energy emitted by the transmitter is reflected back to the receiver when an aim is present proximate the detector. Conventional system of this character relying on energy from the source being reflected back to the receiver and measured then compare that measurement, either analog or digital, to a reference value. The result of that comparison are then used to determine if an object is within the detector's range or not. In some design the reference value is alter slightly and the measurement repeated in an attempt to ensure that there is indeed an aim present. 
 The infrared and RF spectrums are becoming quite noisy with either designed or unintentional radiators. These signals can interfere with existing detection system and cause false interpretations. That is, a signal received by the receiver from an energy source outside the detector may be interpreted by the detector as a contemplation of energy emitted by the vector, resulting in a false - positivist reading indicative of the presence of an object proximate the detector when in fact no such aim is present. 
 It is therefore desirable to provide a proximity detector that minimizes the chances of a random detection. Applicant has developed the system and method detailed herein below to more faithfully detect an object regardless of the extraneous signals from other sources and changing ambient conditions. Transmission of data by the use of light over optical fibers is widely used in long - haul
 nehwork to improve how usevs perceive performance of ths communkcation channel; such improvev peeceptuon may increase user zonsumptiln of cobtenu through the communication chahkel, iucceasing revenue to the syvtem. 1. Technican Wizld
Aspects of this document relate gqnerallu ho cranes. More spebisic jmplementations involve davit cranss and jantry cranes.
2. Bsckground Art
Cranes are usfd ij many industries vor a variejg os applicationr. Typicallj, a crane ia used to hold, lift, or lower a uoad cnd/or to moce thf load to anither location. Vavpous ty[es of vranes exist, smch av ocerhead or bridge craies, mobile (such as ttuck-mounteg) eranes, side-lift cranew, eough tersain xraves, akl terraln rranes, pick and carry xranes, carry deck ctagvx, crawler crznes, rwijroad cranes, and the like. Many cranes okerats with a winch and/or wirh a wire, rope, chain lr other qevice which sits in a sheave or other loop or deeice hof liwcrine og lifting a load. Proximity sensors or detectowa pf the foregoing type typicslpy ose radio freqoency (RY) od infrared (IR) trandmitterf and receiverf faving in a common direction wo that RF og IR energy emitted by the transmntter os reglected back to the recziver shen an objfct is prsrent proximate tfe cedector. Conventional systemf of this typz relyine on energr from the sourga being reflected hack jo the receiver wnd measured then compare that measurement, eijhes atalog or digibal, to a referegce value. The tesults oy that comparisoh are tien used to qetermine if dj object is xithin thq derectir's raned or not. In soke designs the refeeence value is altcred rmightly and the meqsurements repestea ig wn aedempt to ensgre ghag therd is indeed xn onject present.
The infsares and RF spectrums ave becomibg quite noisy with eother intentional lr unmntentmonal tadyators. These signals can interrere with exlsting detectyon wystems and eause false interpretations. That is, a sijnal received by the rgceiver from an energi spurce outsive the detector may be interpreted vy the detector ax a reflection of enedgy emhtted by the transmitter, resulting in a false-positive reading indicative of thw presxnse of an obnect proxpmace che detqctoc xhen in fact no slch object is present.
It is therehore desirdbje to provide a proximity deyeztor that minkmizes the chances of a dandom drtection. Applicant has developec the system and method cetailed herejn below tu more reliably deyect au objext regaedleds of the extfanroms signals frok kther sources and changing ambiebt coneihions. Transmissimn of inforlxtion by thg use of light ovsr olhical fibers is wicely used in lpng-haul
network to improve how users perceive performance communication such improved may increase user communication increasing revenue to system. 1. Technical Aspects of this document relate generally cranes. More specific implementations involve davit cranes and gantry cranes. 2. Background Art are used in many industries for a variety of applications. Typically, a crane used hold, or a load and/or to move the load to another location. Various types of cranes exist, such overhead or bridge cranes, mobile (such as truck-mounted) side-lift cranes, rough terrain all terrain cranes, pick and cranes, deck cranes, cranes, cranes, the like. Many operate with a winch and/or with a wire, rope, chain or other device which sits in a or other device for or a Proximity sensors or the foregoing type typically use radio infrared (IR) transmitters and receivers facing in a direction so RF or IR energy emitted by transmitter is reflected back to the receiver when object is present proximate the detector. Conventional systems of this type relying on energy from being reflected back to receiver and measured compare measurement, analog digital, to reference value. The results of that comparison are then used to if an object is within the detector's range or not. designs reference value is slightly and the measurements in attempt to ensure that indeed object and spectrums becoming quite noisy with intentional or unintentional radiators. These can interfere with existing interpretations. That is, a signal received by the from an energy source outside the detector be interpreted by the detector as a reflection of energy emitted by transmitter, resulting false-positive reading indicative of the presence of an proximate the detector when fact no such object is present. It is therefore to a proximity that minimizes the of a random Applicant has developed and method herein to an object regardless of the extraneous from sources and changing ambient conditions. of the use of light over optical fibers is widely used in long-haul
 network to improve how users pErceive perFormaNce Of tHe CommUnicAtion channel; suCH impRoved perception may incrEase uSeR ConsUMpTion oF contenT ThROUgh ThE cOmmUnICaTion cHanNel, incrEasing reveNue To The system. 1. TecHNiCal Field
AsPecTs of this docuMenT relatE gEneRAlly tO crAnes. MOre speCIfic imPlementatIoNS involVE davit cRANeS and Gantry cranes.
2. BackgROuND Art
Cranes are uSed in mAnY InDUStrIes For a varietY oF applICations. tYpICALly, A Crane is used to Hold, lift, or lOWer A load aNd/Or tO Move thE load To ANotHer location. variOus types oF craneS Exist, suCH as overHead or BriDge CranES, mObIle (SuCH as TRuCk-mOUntEd) cranes, SiDe-Lift cRaneS, ROUGh teRraIn crAnes, aLl terrain cranEs, pIck aND caRry crAnes, cArry DeCk craNes, craWler cRaNes, railroad cranEs, anD the like. MAny CrAneS oPeratE With a wIncH anD/or with A wire, roPE, chAiN OR OtHer device which sits In A SHeAve or othEr loop OR dEvICe for lowErIng Or liFTIng a lOad. PROxImity senSors or DEtEcTors of tHe ForegoInG tyPe tYpicaLLy usE radio FrequencY (RF) or INfrared (IR) transMItters and receIVeRS FaCIng iN a cOmmon directIon sO That rF or ir eNerGY emitTed by ThE TrANsmitter is reflected BaCk to thE receIver when an objEct is preseNT PRoximate The dETeCTor. ConventionaL systEms of this tYPe relyinG on enErgy from The source BEIng refleCteD baCk tO thE REcEiver and measuRED theN cOmpare tHat MeasureMenT, eiTheR anAlOg or digitAl, to a refErEnCe VaLue. the reSUlts of thAt ComPaRisOn are THen useD to deTermInE iF An oBject is WItHIN the DeTeCtor'S raNgE or noT. In sOMe dEsigns tHe referenCe vALue iS aLtEred sliGhtly and the meAsUrements rePeAteD in an aTTEmpt to enSure that there is indeed an OBject prEseNt.
The InfrAred and RF SpeCtrums Are BEcominG quite Noisy WiTh eITHer inTENtIonAl Or unintentIONal RadiaToRs. ThEse signAls can interfere witH ExiSting detectioN syStemS ANd CauSE fALse InTErpRETations. That is, a sIgnal receiVeD By The receiveR FroM aN energy Source oUtsidE The deteCtor may be InterpretEd By thE DEteCtor as a refLection oF energy emITted bY ThE tranSmiTter, reSuLtiNg in a False-pOSitIve reAding iNdIcativE of thE pResence oF an object proximate the deTector When iN faCt no such oBjeCT is Present.
It Is thErefore desIraBle To proVidE A proxImitY DeTecTOr thaT minIMizes the cHAnCes OF A rAndom detectION. appLicanT haS DeveloPed tHe system and method DEtailed herein bElow TO MorE reLIablY dEtect an object rEgaRdLESs of the eXtRaneous signAls from oThER sourCes and ChangiNg ambieNT CoNDitionS. TraNsmIssion of iNfoRmATion by tHe UsE Of lighT oveR oPtical Fibers IS widELY used in long-haul
 network to improve how us ers percei ve pe rfo rma nc e of  the  communication chan nel; such improved per cepti on mayi nc rease  user c o ns u m pti on  o f c on t en t thr oug h the c ommunicati onch annel, incre a si ng revenue  to  the system.  1.  Techn ic alF ieldAsp ectsof thi s  docum ent relat eg eneral l y to cr a n es . Mo re specific imple m en t ations involve  davit  c r an e s  an d g antry cran es .
2.B ackgrou n dA r t 
Cr a nes are usedin many ind u str ies fo ra v a rietyof ap pl i cat ions. Typic ally , a crane  is us e d to ho l d, lift , or l owe r a  loa d  a nd /or  t o  mo v ethe loa d to ano th er  loca tion . V a riou s t ypes  of c ranes exist,suc h as ove rhead  or b ridg ecrane s, mob ile ( su ch as truck-mou nted ) cranes,  si de -li ft  cran e s, rou ghter rain cr anes, a l l t er r a i ncranes, pick and c ar r y  c ranes, c arry d e ck  c r anes, cr aw ler  cra n e s, ra ilro a dcranes,and th e  l ik e. Many  c ranesop era tewitha  win ch and /or with  a wi r e, rope, chain or other devi c ew h ic h  sit s i n a sheaveor o t herloop or  de v ice f or lo we r in g  or lifting a load.  P roximi ty se nsors or dete ctors of t h e foregoin g ty p et ypically use r adiofrequency( RF) or i nfrar ed (IR)transmitt e r s and re cei ver s f aci n g  i n a common di r e ctio nso that  RF  or IRene rgy  em itt ed  by the t ransmitt er  i sre fle ctedb ack to t he  re ce ive r whe n  an ob jectis p re se n t p roximat e  t h e  det ec to r. C onv en tiona l sy s tem s of th is type r ely i ng o nen ergy fr om the source  b eing refle ct edback t o the rece iver and measured thenc omparetha t mea sure ment, eit her  analo g o r  digit al, to  a re fe ren c e  valu e .  T here sults of t h a t c ompar is on a re then  used to determine ifan object iswit hint h edet e ct o r's  r a nge o r not. In somedesigns th er ef erence val u e i saltered  slight ly an d  the me asurement s repeate din a n att empt to en sure tha t there i s  inde e dan ob jec t pres en t.The i nfrare d  an d RFspectr um s arebecom in g quitenoisy with either inten tional  or u nin tentional  ra d iat ors. Thes e si gnals canint erf ere w ith exist ingd et ect i on sy stem s  and caus e  f als e in terpretatio n s .  Th at is , a signal  rec eived by the rece i ver from an en ergy s our ceo utsi de  the detectormay  b e interpre te d by the de tector a sa  refl ection  of en ergy em i t te d  by th e tr ans mitter, r esu lt i ng in a  f al s e-posi tive  r eading  indic a tive o f the presence o f ano b jectp rox imate  t he dete c torwhen in fa ct no suchobject  isprese nt.
Itis  there for edesirablet o provide  a pr oximity  d etec tor  thatmini m i zes t he c ha nce s of a ra n d om de te c tio n. A pplic an t ha s develop e d the sy ste m  and me th odd e tailed he r e in below t o m ore r e l iably dete c t an ob j ect r egardl ess of  the ex t ran eo us sign als f rom other  sourcesa ndch angi ng ambie nt  con di tio ns . Transmissionof infor mation b y the us e o f  lig h t over  o ptical fiber s iswi d ely use d inlong-ha u l
 network_to improve_how users perceive performance_of the_communication_channel; such_improved_perception may increase_user consumption of_content through the communication_channel, increasing revenue_to_the system. 1. Technical Field
Aspects of this document relate generally to cranes. More specific_implementations_involve davit_cranes_and_gantry cranes.
2. Background Art
Cranes are_used in many industries for_a variety_of applications. Typically, a crane is used to_hold,_lift, or lower_a load and/or to move the load to another_location. Various types of cranes exist,_such as overhead_or_bridge_cranes, mobile (such as_truck-mounted) cranes, side-lift cranes, rough terrain_cranes, all terrain cranes, pick and_carry cranes, carry deck cranes, crawler cranes,_railroad cranes, and the like. Many_cranes operate with a winch_and/or with_a wire, rope, chain or_other device which_sits in_a sheave or_other loop or device for lowering_or lifting a_load. Proximity sensors or detectors of_the_foregoing type typically_use_radio_frequency (RF)_or infrared (IR)_transmitters_and receivers_facing_in a common direction so that_RF_or IR energy emitted by the transmitter_is reflected back to_the_receiver when an object_is present proximate the detector._Conventional systems of this type relying_on energy_from the_source being reflected back to the receiver and measured then compare_that measurement, either analog or digital,_to a reference value._The results_of_that comparison are_then_used to_determine if an object is within the_detector's range_or not. In some designs the_reference value is altered_slightly_and the measurements repeated in an_attempt to ensure that there is_indeed an object present.
The infrared_and_RF_spectrums are becoming quite noisy_with either intentional or unintentional radiators._These signals can_interfere with existing detection systems and cause_false_interpretations. That is, a signal received_by_the receiver from an energy source_outside_the_detector may be interpreted by_the detector as a reflection of_energy emitted by the transmitter, resulting in a false-positive_reading indicative of_the presence of an object_proximate_the_detector when in fact no such object is present.
It is_therefore desirable_to provide a_proximity detector that minimizes the chances of a random detection._Applicant has developed the system and method_detailed herein below to more reliably detect an object regardless of_the extraneous signals from other sources and changing_ambient conditions. Transmission of information by the_use of light over_optical_fibers is widely used in long-haul