PowerPoint Presentation

Y BAN NHN DN THNH PH H CH MINHTRNG I HC SI GNKHOA IN T-VIN THNG

MN HC :K THUT O LNG

TN TI : TM HIU MY DAO NG K IN T OSCILLOSCOPE

GHVD: THS NGUYN HU PHCSVTH: HU TON LP DDT1111

LOGOwww.trungtamtinhoc.edu.vnwww.trungtamtinhoc.edu.vnMC LCI.NG TIA IN TII.CC KHI CHC NNG TRONG DAO NG KIII.DAO NG K 2 KNHIV.NG DNG V CCH S DNG

IV.DAO NG K IN Twww.trungtamtinhoc.edu.vnT VN Lch s ra i : Nm 1880, JulesFrancois Joubert pht minh ra Hand-drawn oscillograms l tin thn ca my hin sng hin i, Tip theo l s ra i ca ondograph hospitalier(cn c gi l oscillographs) vo nm 1903. Mc d s ra i ca oscillograms, oscillographs(Ondograph Hospitalier),mirror galvanometer(in k gng)l bc t ph quan trng, nhng tt c ba k thut hin th in p ny qu chm iu dn n sra i ca ng tia cathode( CRTthnh phn quan trng ca oscilloscope), c xut bi Albert Hess v Ferdinand Braun trong nhng nm 1890, tuy nhinmi n nhng nm 1920 mn hnh CRT mi trthnh thc t v ph bin, vy n nm 1920 oscilloscopec s dng rng ri, n khc phc c s chp chp ca cc th htrc.Tm quan trng ca my o in t OSCILLOSCOPE trong lnh vc in t -vin thng ?Bng cch s dng my hin sng ta xc nh c :Gi tr in p v thi gian tng ng ca tn hiuTn s dao ng ca tn hiu.Gc lch pha gia hia tn hiu.Dng sng ti mi im khc nhau trn mch in t.Thnh phn ca tn hiu gm thnh phn mt chiu v xoay chiu nh th no.Trong tn hiu c bao nhiu thnh phn nhiu v nhiu c thay i theo thi gian hay khng.

www.trungtamtinhoc.edu.vn

TDS210www.trungtamtinhoc.edu.vnI.NG TIA IN TRealityCreativty

CU TO NG TIA IN Twww.trungtamtinhoc.edu.vnI.NG TIA IN TThemeGallery is a Design Digital Content & Contents mall developed by Guild Design Inc.A.cu to ng in t CRT( cathode ray tube) L 1 ng thy tinh hnh tr u c cha cc in cc,pha cui loe ra hnh nn ct,mt y c ph mt lp hunh quang to thnh mn hnh :cu to gm 3 phn :+Mn hnh :Lp hunh quang ( c ch r trn hnh v) l hp cht photpho.

www.trungtamtinhoc.edu.vnI.NG TIA IN TSng in t :Gm si t F, catot K, li iu ch G(M), cc anot A1, A2.:Nhim v: to gia tc v hi t.chm tia in t.-Cc in cc c dng hnh tr( lm bng Niken), ring Katot c ph lp Oxit kim loi tng kh nng bc x in t.-.Ngun cp:UK=2kV.UKG= 0=>50V.UA2=0V.UA1= 300 V.

www.trungtamtinhoc.edu.vnI.NG TIA IN T

www.trungtamtinhoc.edu.vnI.NG TIA IN TH thng li tia :Lm lch chm tia in t bn ti mn hnh theo chiu ng hoc chiu ngang ca mn hnh.Cu to: gm hai cp phin lm lch c t trc, sau v bao quanh trc ca ng:Cp li ng Y1 Y2.Cp li ngangX1 X2.

www.trungtamtinhoc.edu.vnI.NG TIA IN TLm sao quan st c tn hiu trn Oscilloscope ?

www.trungtamtinhoc.edu.vnI.NG TIA IN TNguyn l lm vic Catot pht ra electron v c cc h thng in cc iu khin c s lng ht, vn tc v hi t cn thit. H thng lm lch s lm cho chm tia in t di chuyn trn mn hnh theo phng ngang v phng ng hin dng ca tn hiu. ch hin th dng sng thng thng, tn hiu cn hin th c a vo cp lm lch ng cn mt tn hiu dng rng ca c a vo cp lch ngang.Khi vi tn s rng ca (cn gi l tn s qut) ph hp trn mn hnh s c mt sng ng c dng sng cn hin th.

www.trungtamtinhoc.edu.vn II.CC KHI CHC NNG TRONG DAO NG K

www.trungtamtinhoc.edu.vn II.CC KHI CHC NNG TRONG DAO NG K

www.trungtamtinhoc.edu.vnChc nng tng khi :Ngun cung cp to ra in p mt chiu ant (vo khong vi kV) cho li, catt, cc gia tc v tt c in th DC cho cc mch in trong dao ng k.Khi khuch i tn hiu iu khin chm tia in t qut theo chiu dc .Khi to tn hiu rng ca p lm chun thi gian cho trc X ca mn nh dao ng k Khi khuch i tn hiu iu khin chm tia in t qut theo chiu ngang q. Khi to tn hiu xung kch rcho s ng b ha,iu khin chm tia in t qut dc v ngang cho hnh nh hin th trn mn nh ng yn (ngha l phi c s phi hp ng b cho s iu khin qut dc v qut ngang ca chm tia in t)

www.trungtamtinhoc.edu.vnKhi khuch i qut dc

www.trungtamtinhoc.edu.vn

www.trungtamtinhoc.edu.vnkhi khuch i qut ngang.

www.trungtamtinhoc.edu.vn

www.trungtamtinhoc.edu.vnS ng b gia tn hiu qut dc v qut ngang.

www.trungtamtinhoc.edu.vn

www.trungtamtinhoc.edu.vnThang o ca dao ng k

www.trungtamtinhoc.edu.vnIII.Dao ng k 2 knh

c th cng lc quan st c hai tn hiu kho st trn mn nh, ngi ta thc hin dao ng k hai knh (hoc nhiu knh). Trc ht, ci tin ng phng tia in t (CRT)

www.trungtamtinhoc.edu.vnC hai loi: - Loi hai catt pht ra hai chm tia in t (dual beam) - Loi mt catt pht ra mt chm tia in t nh kha chuyn iin t thc hin tun t chm tia in t c qut dc mi knh (do tn s chuyn mch ln hn tn s lu nh ca mt cho nn chng ta thy c hai hnh nh ca hai knh trn cng mt mn nh). Nh vy mch khuch i qut dc s c hai mch cho mi knh. Tn hiu qut ngang tun t phi hp vi tn hiu mi knh A v B theo hnh

www.trungtamtinhoc.edu.vn

www.trungtamtinhoc.edu.vnIV. My dao ng k in t su im : duy tr nh ca tn hiu trn mn hnh vi khong thi gian khng hn ch. tc c c th thay i trong gii hn rng c th xem li cc on hnh nh lu tr vi cht lng thp hn nhiu hnh nh tt hn p hn xo vi my tng t vn hnh n gins liu c th truyn trc tip vo my tnh khi kt ni vi my tnh

www.trungtamtinhoc.edu.vn2. cu to v hot ng

www.trungtamtinhoc.edu.vnV.ng dng v cch s dng dao ng k_ng dng: +o bin v chu k:ph thuc vo nt phn tm o(Volt/Div) v nt chu k ca tn hiu( sec/div). +o sc lch pha gia 2 tn hiu:o bng cch cho tn hiu A knh X,cho tn hiu B vo knh Y,chuyn my o sang ch X-Y.Nu hon ton khng lch pha s c mt ng cho nghing 45 ,nu thnh hnh elip l c lch pha,bin mp rng bao nhiu l lch pha ngn .Nu c mo pha,mo hi xut hin th ng bin thnh hnh hoa vn ty theo bin ca cc hi chn. +o thi gian ln ,xung ca xung. +V c tuyn V-I ca linh kin in t.

www.trungtamtinhoc.edu.vn_Lm quen vi tn gi v chc nng ca mt s nt c bn trn my dao ng k.

1)Nt ngun 6)Ngun tn hiu 1Khz(chnh Probe) 7)Nt iu chnh v tr tia sng 9)Nt iu chnh gia tr Vold/DIV13)Ng vo knh A 14)Ng vo knh B19)iu chnh gi tr sec/DIV

www.trungtamtinhoc.edu.vnHng dn oo in p :V=(s ng)x VOLTS/DIV.Lu :s ng ti a l 8 VD:

www.trungtamtinhoc.edu.vnHng dn oo chu k :T=(s ngang)xTIME/DIVLu s ngang ti a l 10 .VD:

www.trungtamtinhoc.edu.vnHng dn oo s lch pha gia 2 tn hiu :

www.trungtamtinhoc.edu.vnHng dn oo in p xoay chiu :V c tuyn V-I ca linh kin in t

www.trungtamtinhoc.edu.vnwww.themegallery.comThank You !Add your company slogan

LOGOwww.trungtamtinhoc.edu.vnwww.trungtamtinhoc.edu.vn