(rē″flek″tom′ĕ-trē) [reflect + -metry] Ib chav kuaj txheej txheem rau kev tshuaj xyuas nyias txheej ntawm cov khoom, xws li cov kab mob lom lossis cov txheej txheem hlau. Nws yog ua los ntawm kev ntsuas qhov tawg ntawm cov energized hais los ntawm txheej txheej.
Yuav ua li cas yog reflectometry le caag?
Different reflectometry techniques
In time-domain reflectometry (TDR), ib qho tawm lub tsheb ciav hlau ceev ceev, thiab tshuaj xyuas qhov loj, ntev thiab cov duab ntawm reflected pulses. Frequency-domain reflectometry (FDR): cov txheej txheem no yog ua raws li kev sib kis ntawm cov txheej txheem stepped-frequency sine waves los ntawm tus qauv.
Y Yuav ua li cas reflectometers ua haujlwm?
A TDR ua haujlwm zoo li radar. Lub sij hawm nce ceev ceev yog txhaj rau hauv lub kaw lus cable ntawm ib qho kawg (ze kawg). Raws li cov mem tes mus rau hauv lub cable, txhua qhov kev hloov pauv ntawm cov yam ntxwv impedance (impedance discontinuities) yuav ua rau qee qhov teeb meem tshwm sim los cuam tshuam rov qab mus rau qhov chaw.
Dab tsi yog optical frequency domain reflectometry?
Optical Frequency Domain Reflectometry (OFDR) yog cov thev naus laus zis tshwj xeeb uas yog siv rau kev tsom xam ntawm cov teeb pom kev zoo thiab cov yam ntxwv ntawm kev cuam tshuam hauv cov khoom siv kho qhov muag thiab cov khoom. … Los ntawm Fourier transformation ntawm lub resulting teeb liab qhov spatial faib ntawm lub teeb reflected yog ntsuas.
TDR test ua li cas?
Nws siv lub teeb liab tsis tshua muaj hluav taws xob uas yuavtsis txhob cuam tshuam txoj kab lossis cuam tshuam nrog cov kab nyob ze. Lub TDR xa cov mem tes ntawm lub zog nqes hauv kev sim; Thaum tus mem tes ntsib qhov kawg ntawm lub cable lossis ib qho kev ua txhaum ntawm cable, ib feem ntawm lub zog mem tes yog tshwm sim.
