Txoj kev xeem cwj mem rau lub teeb-emitting diodes ua haujlwm
Daim ntawv no qhia txog tus cwj mem tshiab uas tsis tshua muaj hluav taws xob, uas nws txoj haujlwm thiab kev siv tau zoo ib yam li cov qauv neon tube xeem cwj mem. Ceramic nti tawm suab, thiab qhia seb qhov ntsuas qhov ntsuas puas raug them los yog tsis nyob rau hauv daim ntawv ntawm lub suab thiab lub teeb dual ntsuas, uas tsis yog tsuas yog ua rau qhov kev ntsuam xyuas pom ntau qhov muag, tab sis kuj kov yeej qhov tsis txaus ntawm neon raj xau thiab tsis ua haujlwm, thiab paub qhov solidification ntawm passive test zaub li.
Raws li peb txhua tus paub, qhov ntsuas tam sim no tau tso cai los ntawm cov xaum ntsuas feem ntau nyob hauv qib microampere. Xws li ib tug me me tam sim no tsis tuaj yeem ncaj qha tsav lub luminous raj rau emit lub teeb thiab piezoelectric ceramics los tsim suab, tab sis los ntawm kev xav ntawm lub zog, qhov pib voltage ntawm lub raj neon yog li ntawm 100V, thiab pib tam sim no yog xam raws li 1μA, yog li nws qhov tsawg kawg nkaus luminous hwj chim yog 0.1mw thiab lub turn-on voltage ntawm lub teeb-emitting diode yog 1.6V-2V, qhov tsawg kawg nkaus luminous tam sim no yuav ua tau raws li tsawg li 0.1mA, thiab nws qhov tsawg kawg nkaus luminous hwj chim yog hais txog 0.16mW, uas yog tib yam kev txiav txim ntawm magnitude raws li qhov tsawg kawg nkaus luminous hwj chim ntawm lub neon raj. Yog hais tias lub zog-sau Circuit Court yog ntxiv los ua kom cov mem tes zog, lub teeb-emitting diode tuaj yeem raug tsav los tawm lub teeb nrog lub zog hluav taws xob ntawm lub raj neon. Tsis tas li ntawd, qhov tam sim no xav tau rau piezoelectric ceramics ua haujlwm yog me me, thiab nws tsis muaj teeb meem rau kev cia siab rau qhov ntsuas hluav taws xob ntawm lub raj neon los txhawb nws lub suab.
Raws li kev txheeb xyuas saum toj no, tus neeg sau tau tsim lub hauv paus ntsiab lus ntawm cov cwj mem hluav taws xob raws li qhia hauv daim duab txuas. Tus qauv ntawm qhov voltage faib tam sim no limiting resistor R, lub xeem davhlau ya nyob twg CS, thiab kov lub davhlau ya nyob twg CM yog zoo ib yam li cov tsoos hluav taws xob ntsuas cwj mem. Diodes VD1-VD4 tsim tus choj rectifier, thiab daim ntawv piezoelectric ceramic YD tsis yog tsuas yog siv los ua lub suab nrov xwb, tab sis kuj siv nws tus kheej lub peev xwm los them thiab sib sau ua ke lub zog thiab mem tes tawm. Thyristor VS thiab trigger tubes VS1 ~ VS4 tsim ib qho hluav taws xob hloov, uas tswj lub sijhawm them ntawm YD capacitor, thiab nws qhov hluav taws xob hluav taws xob tuaj yeem hloov kho los ntawm kev hloov tus naj npawb ntawm cov hlab ntsha, kom qhov "glow" voltage ntawm tus cwj mem xeem tuaj yeem ua tau. kho. Thaum lub sij hawm kuaj fais fab, tus choj rectifier hloov qhov tsis muaj zog AC kuaj tam sim no rau hauv DC, thiab tsub lub peev xwm ntawm YD nws tus kheej kom sib sau lub zog. Thaum qhov hluav taws xob ntawm ob qho kawg nce mus rau qhov hluav taws xob ntawm VS1 ~ VS4, VS tau tshwm sim los ntawm nws thiab ua haujlwm sai. YD tso tawm thiab tso tawm lub zog rau LED los ntawm VS nyob rau hauv lub sijhawm luv luv, thiab LED tau txais cov mem tes tam sim no uas nws qhov kev siv zog tshaj nws qhov tsawg kawg nkaus lub teeb-emitting tam sim no, thiab flashes nrog lub siab ci. Nyob rau tib lub sijhawm, YD kuj tawm suab uas tuaj yeem hnov los ntawm tib neeg pob ntseg. Nrog rau kev them nyiaj tas mus li thiab tso tawm ntawm YD capacitor, LED yuav ua kom flashing, thiab YD tseem yuav ua kom lub suab tsis sib xws, kom lub cwj mem hluav taws xob muaj lub luag haujlwm ntawm lub suab thiab lub teeb pom kev zoo dual. Tau kawg, koj tuaj yeem siv lub capacitor hloov YD. Lub sijhawm no, tus cwj mem xeem tsuas muaj qhov ua haujlwm ntawm luminous qhia, tab sis qhov ci yuav siab dua; koj tuaj yeem tshem tawm lub teeb-emitting raj los tsim ib qho kev ua haujlwm audio test cwj mem.
Qhov ci ntsa iab ntawm neon tube xeem cwj mem txawv heev nrog rau qhov chaw siv, tab sis lub teeb ci ci thiab lub suab ntawm lub ntsuas ntsuas ntsuas tsuas yog txiav txim siab los ntawm lub voj voog, thiab tsis muaj dab tsi cuam tshuam nrog kev siv ib puag ncig, thiab yog qhov tseem ceeb. Nws tsuas yog tias qhov ceev ntawm flickering thiab suab hloov pauv nrog qhov loj ntawm qhov ntsuas tam sim no. Qhov loj dua qhov ntsuas tam sim no, qhov ceev ntawm flickering thiab suab nrov, thiab vice versa. Qhov no ua rau lub flashing thiab sounding ceev ntawm tus cwj mem xeem roughly qhia txog tus neeg teb xov tooj qhov tsis kam mus rau hauv av los yog qib ntawm qhov ntsuas hluav taws xob, vim tias ob yam no txiav txim siab qhov loj ntawm qhov ntsuas tam sim no.
Thaum lub ntsuas hluav taws xob ntsuas hluav taws xob ua haujlwm, lub voj voog yog nyob rau hauv micro-tam sim no lub xeev, yog li nws muaj lub neej ua haujlwm ntev. Tom qab ntau tshaj li ib xyoos ntawm kev sim thiab kev sim los ntawm tus sau, nws tau raug pov thawj tias cov hluav taws xob tsis zoo ntawm cov cwj mem hluav taws xob ua tau raws li qhov yuav tsum tau ua ntawm cov txheej txheem kev nyab xeeb hluav taws xob, thiab kev ua haujlwm ua haujlwm ruaj khov thiab txhim khu kev qha. Raws li kev tsim thiab tsim ntawm nws lub plhaub, nws tuaj yeem tswj tau yooj yim raws li qhov ua tau raws li cov kev qhia tshwj xeeb.
