Oscilloscope tso saib Circuit Court muaj pes tsawg leeg
Cov khoom siv hluav taws xob muaj xws li ob ntu: lub raj oscilloscope thiab nws cov tswj Circuit Court. Lub oscilloscope yog ib hom tshwj xeeb ntawm cov raj hluav taws xob thiab yog ib feem tseem ceeb ntawm oscilloscope. Lub oscilloscope raj muaj peb ntu: phom electron, deflection system thiab fluorescent screen.
(1) Electron phom
Cov phom hluav taws xob yog siv los tsim thiab tsim kom muaj kev kub ceev, tsom electron kwj deg los foob lub fluorescent screen thiab ua rau nws tawm lub teeb. Nws feem ntau muaj filament F, cathode K, tswj electrode G, thawj anode A1, thiab thib ob anode A2. Tsuas yog cov filament, cov qauv ntawm lwm cov electrodes yog hlau thooj voos kheej kheej, thiab lawv cov axes yog khaws cia rau tib axis. Tom qab lub cathode yog rhuab, nws muaj peev xwm emit electrons raws axial kev taw qhia; tus tswj electrode muaj qhov tsis zoo uas cuam tshuam rau cathode. Kev hloov lub peev xwm tuaj yeem hloov pauv tus naj npawb ntawm cov hluav taws xob dhau los ntawm qhov me me, uas yog los tswj qhov ci ntawm lub teeb me ntsis ntawm lub vijtsam fluorescent. Txhawm rau ua kom lub teeb ci ntawm qhov chaw ntawm lub vijtsam tsis tas yuav txo qhov rhiab heev rau electron beam deflection, tom qab acceleration electrode A3 yog ntxiv ntawm deflection system thiab phosphor screen nyob rau hauv niaj hnub oscilloscope raj.
Thawj anode muaj qhov zoo voltage ntawm li ob peb puas volts siv rau cathode. Ib qho hluav taws xob zoo dua li thawj anode yog siv rau qhov thib ob anode. Cov kab hluav taws xob hla dhau lub qhov me me heev yog nrawm los ntawm qhov muaj peev xwm ntawm thawj anode thiab thib ob anode thiab txav mus rau qhov screen fluorescent ntawm kev kub ceev. Vim hais tias zoo li cov nqi sib tw, cov nqaj hluav taws xob maj mam nthuav tawm. Los ntawm kev tsom mus rau cov hluav taws xob hluav taws xob ntawm thawj anode thiab thib ob anode, cov hluav taws xob tau rov ua dua thiab sib sau ua ke ntawm ib qho chaw. Los ntawm kev tswj xyuas qhov sib txawv ntawm qhov sib txawv ntawm thawj anode thiab thib ob anode, qhov ua kom pom tseeb tuaj yeem poob rau ntawm lub vijtsam fluorescent thiab lub teeb ci thiab me me yuav tshwm sim. Hloov qhov sib txawv ntawm qhov sib txawv ntawm thawj anode thiab qhov thib ob anode tuaj yeem kho qhov pom ntawm lub teeb pom kev. Qhov no yog lub hauv paus ntsiab lus ntawm "focus" thiab "auxiliary focus" hloov ntawm oscilloscope. Qhov thib peb anode yog tsim los ntawm txheej sab hauv ntawm oscilloscope lub khob hliav qab nrog ib txheej ntawm graphite. Nws yog feem ntau yog siv nrog ib tug high voltage. Nws muaj peb lub luag haujlwm: 1. Nws txuas ntxiv ua kom cov electrons tom qab dhau los ntawm lub deflection system, kom cov electrons muaj lub zog txaus rau Bombard lub vijtsam fluorescent kom tau txais qhov ci txaus; ② Cov txheej graphite yog coated rau tag nrho lub khob hliav qab, uas tuaj yeem ua lub luag haujlwm tiv thaiv; ③ Cov kab hluav taws xob tawg ua rau lub vijtsam fluorescent tsim cov khoom siv hluav taws xob thib ob, thiab A3 ntawm lub peev xwm siab tuaj yeem nqus tau cov electrons.
(2) Deflection system
Feem ntau ntawm cov deflection systems ntawm oscilloscope raj yog electrostatic deflection hom, uas muaj ob khub ntawm parallel hlau daim hlau perpendicular rau ib leeg, hu ua kab rov tav deflection daim hlau thiab ntsug deflection daim hlau feem. Tswj kev txav ntawm lub teeb hluav taws xob nyob rau hauv kab rov tav thiab ntsug cov lus qhia feem. Thaum cov electrons txav ntawm daim hlau deflection, yog tias tsis muaj qhov hluav taws xob siv rau ntawm daim hlau deflection thiab tsis muaj hluav taws xob ntawm daim hlau deflection, cov hluav taws xob nkag mus rau hauv deflection system tom qab tawm ntawm qhov thib ob anode yuav txav mus rau hauv axis thiab tua ntawm qhov chaw ntawm qhov screen. Yog tias muaj qhov hluav taws xob ntawm lub phaj deflection, muaj qhov hluav taws xob nruab nrab ntawm daim hlau deflection, thiab cov hluav taws xob nkag mus rau qhov deflection system yuav raug coj mus rau qhov chaw xaiv ntawm lub vijtsam fluorescent nyob rau hauv qhov kev txiav txim ntawm deflection hluav taws xob teb.
Yog hais tias ob daim hlau deflection yog sib npaug rau ib leeg thiab lawv qhov sib txawv muaj peev xwm sib npaug li xoom, ces cov kab hluav taws xob hluav taws xob nrog ceev υ dhau los ntawm qhov chaw deflection phaj yuav txav mus rau qhov qub kev taw qhia (teeb raws li axis kev taw qhia) thiab ntaus lub hauv paus chiv keeb. ntawm qhov screen fluorescent. . Yog tias muaj qhov sib txawv tsis tu ncua ntawm ob daim hlau deflection, ib qho hluav taws xob yuav raug tsim los ntawm cov phaj deflection. Qhov hluav taws xob teb no yog perpendicular mus rau cov kev taw qhia ntawm lub zog ntawm cov electrons, yog li cov electrons yuav deflect mus rau lub deflection phaj nrog lub peev xwm ntau dua. Nyob rau hauv txoj kev no, nyob rau hauv qhov chaw ntawm ob daim hlau deflection, cov electrons txav tangentially raws parabola ntawm qhov no. Thaum kawg, cov electron tsaws ntawm point A ntawm lub vijtsam fluorescent. Qhov point A no yog ib qho kev ncua deb ntawm lub hauv paus chiv keeb (0) ntawm lub fluorescent screen. Qhov kev ncua deb no yog hu ua tus nqi deflection, sawv cev los ntawm y. Tus nqi deflection y yog proportional rau qhov voltage Vy siv rau lub phaj deflection. Nyob rau hauv tib txoj kev, thaum DC voltage yog siv rau kab rov tav deflection phaj, qhov xwm txheej zoo sib xws tshwm sim, tshwj tsis yog tias lub teeb pom kev yog deflected nyob rau hauv txoj kab rov tav.
(3) fluorescent screen
Lub vijtsam fluorescent yog nyob rau ntawm lub davhlau ya nyob twg ntawm lub oscilloscope raj. Nws txoj haujlwm yog los tso saib cov kab hluav taws xob deflected rau kev soj ntsuam. Sab hauv phab ntsa ntawm lub oscilloscope lub phosphor screen yog coated nrog ib txheej ntawm luminescent khoom, yog li cov chaw ntawm lub phosphor screen uas muaj kev cuam tshuam los ntawm high-speed electrons emit fluorescence. Lub brightness ntawm lub teeb pom kev nyob rau lub sij hawm no nyob ntawm tus naj npawb, ceev thiab ceev ntawm lub electron beam. Thaum qhov hluav taws xob ntawm cov hluav taws xob tswj hluav taws xob hloov pauv, tus naj npawb ntawm cov hluav taws xob hauv cov hluav taws xob hluav taws xob yuav hloov raws li, thiab qhov ci ntawm lub teeb pom kev kuj yuav hloov. Thaum siv lub oscilloscope, nws tsis pom zoo kom tso cai rau lub teeb ci ntsa iab tshwm nyob rau hauv ib txoj hauj lwm ntawm lub oscilloscope raj lub fluorescent screen, txwv tsis pub cov khoom siv fluorescent ntawm qhov taw tes yuav raug hlawv vim muaj kev cuam tshuam mus sij hawm ntev los ntawm electrons, yog li. poob nws lub peev xwm emit teeb.
Cov ntxaij vab tshaus fluorescent coated nrog cov tshuaj fluorescent sib txawv yuav pom cov xim sib txawv thiab cov sijhawm sib txawv tom qab muaj kev cuam tshuam los ntawm electrons. Feem ntau, tus siv los soj ntsuam cov teeb liab waveforms emits ntsuab lub teeb thiab yog nruab nrab-afterglow oscilloscope raj rau kev soj ntsuam tsis-periodic Rau high-frequency thiab low-frequency signals, lub oscilloscope raj uas emits txiv kab ntxwv-daj teeb thiab yog ib tug ntev- persistence oscilloscope feem ntau yog siv. Hauv oscilloscopes siv rau kev yees duab, luv-permanence oscilloscope raj uas emit xiav teeb feem ntau yog siv.
