Feem ntau ntawm covtransmittersraug teeb tsa rau ntawm qhov chaw, thiab lawv cov cim tso tawm mus rau chav tswj hwm, thiab nws cov khoom siv hluav taws xob los ntawm cov chav tswj. Muaj feem ntau muaj ob txoj hauv kev ntawm cov kev xa khoom kis thiab fais fab hluav taws xob rau lub transmitter:
(1) plaub-hlau system
Lub zog hluav taws xob thiab cov paib tawm suab tawm kis tau los ntawm ob cov xaim, thiab txoj kev hlau yog qhia hauv daim duab 2.3. Cov transmitters no hu ua plaub-hlau transmitters. Lub transmitter ntawm DDZ-ⅱ series ntsuas cov hom hluav taws xob no.Saib lub zog thiab teeb liab yuav tsum sib cais ntawm cov teeb liab tam sim no thiab kev siv hluav taws xob tam sim no ntawm cov khoom siv. Lub zog hluav taws xob yuav yog AC (220V) lossis DC (24V), thiab cov paib tawm suab tuaj yeem tuag xoom (0-10xoo) lossis nyob xoom (4-20mA).
Daim duab 2.3 Plaub-Hlau Kis
(1) Ob-Hlau System
Rau ob-lub transmitter, muaj tsuas yog ob txoj kab txuas ntxiv txuas nrog, thiab ob txoj hauv hluav taws xob xa cov paib hluav taws xob rau tib lub sijhawm, raws li muaj nyob hauv daim duab 2.4. Nws tuaj yeem pom tau hais tias lub zog hluav taws xob, xa khoom siv hluav taws xob thiab cov khoom siv thauj khoom muaj sib txuas nrog cov tsis sib haum uas nws txoj kev tiv thaiv yog tswj tau los ntawm cov ntsuas ntsuas ntsuas. Thaum cov ntsuas ntsuas ntsuas hloov pauv, qhov hloov pauv hloov ntawm lub tshuab xa tawm hloov pauv, yog li qhov tam sim no ntws los ntawm kev thauj khoom kuj tau hloov.
Daim duab 2.4 Ob-Qhov Kis
Ob-hlau transmitters yuav tsum ua kom tau raws li cov xwm txheej hauv qab no:
①THTH Kev ua haujlwm tam sim no ntawm lub transmitter yuav tsum muaj sib npaug lossis tsawg dua qhov tsawg kawg nkaus tus nqi ntawm cov teeb liab tam sim no
, Uas yog
Txij li cov hluav taws xob kab thiab cov kab teeb liab yog ib qho, lub zog muab rau lub transmitter los ntawm lub teeb liab tau muab los ntawm cov teeb liab tam sim no. Thaum cov zis tam sim no ntawm lub transmitter yog nyob rau qis qis, nws yuav tsum tau ua kom raug tseeb tias semiconductor li hauv nws tseem tuaj yeem ua haujlwm ib txwm.
Yog li ntawd, qhov qis dua tus nqi ntawm cov teeb liab tam sim no tsis tuaj yeem qis dhau. Vim tias ntawm qhov qis dua ntawm cov zis tam sim no ntawm lub tshuab xa khoom, thiab hluav taws xob ua haujlwm ib txwm xav tau, yog li lub teeb liab tam sim no yuav tsum muaj lub chaw muaj pes tsawg. Lub thoob ntiaj teb Unified tam sim no kos npe Adopts 4-20madc, uas tsim cov kev cai rau kev tsim cov ob-hlau transmitters.
②the kev mob voltage rau lub transmitter mus ua haujlwm nquag yog
Hauv cov qauv:
yog cov zis hluav taws xob ntawm lub transmitter;
yog tus nqi tsawg kawg nkaus ntawm lub zog hluav taws xob voltage;
yog qhov txwv ntawm cov zis tam sim no, feem ntau 20ma;
yog qhov siab tshaj plaws thauj tau tus nqi ntawm lub transmitter;
yog tus nqi tiv thaiv ntawm cov hlau txuas.
Ob-lub transmitter yuav tsum tau siv hluav taws xob ib zaug DC. Lub npe hu ua ib leeg fais fab hluav taws xob yog hais txog lub peev xwm tshaj tawm raws li lub zog uas pib, ntau dua li qhov muaj zog thiab tsis zoo hluav taws xob voltage. Cov zis voltage u ntawm lub transmitter yog sib npaug rau qhov sib txawv ntawm lub zog hluav taws xob thiab qhov hluav taws xob poob ntawm cov zis tam sim no ntawm RL thiab cov tsis kam ntawm cov kis hlau. Txhawm rau kom ntseeg tau tias qhov kev ua haujlwm ib txwm ntawm lub transmitter, cov zis voltage muaj txiaj ntsig tsuas yog hloov pauv hauv ib qho tsawg. Yog tias lub nra tsis kam nce ntxiv, hluav taws xob voltage yuav tsum tau nce ntxiv; Txwv tsis pub, lub hwj chim hluav taws xob voltage tuaj yeem poob qis; Yog lub hwj chim muab voltage txo qis, lub nra tsis yuav tsum tau poob qis; Txwv tsis pub, lub load tsis zoo yuav nce.
③the Qhov tsawg kawg hluav taws xob rau lub transmitter mus ua haujlwm ib txwm
Txij li thaum lub zog siv ntawm ob-lub tshuab hluav taws xob me me heev, thiab cov khoom hluav taws xob hloov pauv, cov khoom siv ua haujlwm ntawm txhua feem ntawm cov kab hloov siab heev. Yog li ntawd, thaum ua ob-lub xa khoom siv ob-hlau, nws yuav tsum siv lub zog hluav taws xob tsawg tshaj plaws thiab teeb tsa qhov sib txuas hluav taws xob thiab tam sim no ua rau cov kev ua tau zoo.
Ob-lub cav hlau muaj ntau yam zoo, uas tuaj yeem txo tus nqi ntawm lub cuab yeej, thiab muaj kev tiv thaiv kom nyab xeeb thiab tawg kev tiv thaiv. Yog li ntawd, ntau lub teb chaws nyob hauv lub ntiaj teb tam sim no siv ob hom transmitters.
Lub Sijhawm Post: Dec-16-2022