Cov ntawv luam tawm Circuit Board (PCB) yog kev txhawb nqa rau cov khoom siv hluav taws xob thiab cov khoom siv hauv cov khoom siv hluav taws xob. Nws muab cov hluav taws xob sib txuas ntawm cov khoom siv hluav taws xob thiab cov khoom siv. Nrog rau txoj kev loj hlob sai ntawm cov cuab yeej hluav taws xob, qhov ceev ntawm PGB tau nce siab dua thiab siab dua, PCB tsim muaj kev cuam tshuam zoo rau kev tiv thaiv kev cuam tshuam. Yog li ntawd, hauv PCB tsim. Yuav tsum ua raws li cov hauv paus ntsiab lus ntawm PCB tsim, thiab yuav tsum ua raws li cov kev cai ntawm kev tiv thaiv kev cuam tshuam.
Cov ntsiab cai dav dav ntawm PCB tsim
Txhawm rau kom tau txais kev ua tau zoo tshaj plaws ntawm cov hluav taws xob hluav taws xob, kev teeb tsa ntawm cov khoom thiab cov txheej txheem ntawm cov hlau yog qhov tseem ceeb heev. Txhawm rau tsim cov khoom zoo, tus nqi qis PCB. yuav tsum ua raws li cov hauv qab no.
Ua ntej, xav txog qhov loj ntawm PCB loj. PCB loj dhau lawm thaum cov kab luam tawm ntev, nce impedance, suab nrov tiv thaiv qis, tus nqi kuj nce; me me dhau, nws tsis zoo cua sov dissipation, thiab cov kab nyob sib ze yog qhov yooj yim rau kev cuam tshuam. Tom qab txiav txim qhov loj ntawm PCB. Tom qab ntawd txiav txim siab qhov chaw ntawm cov khoom tshwj xeeb. Thaum kawg, raws li kev ua haujlwm ntawm lub voj voog, kev teeb tsa ntawm tag nrho cov khoom ntawm lub voj voog.
Hauv kev txiav txim siab qhov chaw ntawm cov khoom tshwj xeeb kom ua raws li cov hauv qab no.
1. txo qhov kev sib txuas ntawm cov khoom siv hluav taws xob ntau ntau li ntau tau, sim txo lawv cov kev faib tawm thiab kev cuam tshuam ntawm electromagnetic cuam tshuam. Cheebtsam cuam tshuam rau kev cuam tshuam tsis tuaj yeem nyob ze rau ib leeg, cov tswv yim thiab cov khoom siv yuav tsum nyob deb li deb tau.
2. Qee cov khoom siv lossis cov xaim hluav taws xob muaj peev xwm sib txawv ntawm lawv, yuav tsum ua kom qhov kev ncua deb ntawm lawv, kom tsis txhob tso tawm ua rau muaj kev sib tsoo luv luv. Cheebtsam nrog high voltage yuav tsum tau nteg tawm kom deb li deb li sai tau nyob rau hauv cov chaw uas tsis yooj yim mus cuag los ntawm txhais tes thaum debugging.
3. Cheebtsam uas hnyav tshaj 15g yuav tsum tau kho nrog brackets thiab ces welded. Cov khoom loj thiab hnyav, cov khoom siv hluav taws xob tsim hluav taws xob, yuav tsum tsis txhob muab ntsia rau ntawm cov ntawv luam tawm, tab sis yuav tsum tau muab tso rau hauv lub chassis ntawm tag nrho cov chassis, thiab yuav tsum xav txog qhov teeb meem ntawm cov cua kub dissipation. Thermal Cheebtsam yuav tsum nyob deb ntawm lub tshav kub-generating Cheebtsam.
4. Rau potentiometers, adjustable inductor coils, hloov pauv capacitors, micro keyboards thiab lwm yam adjustable Cheebtsam layout yuav tsum xav txog cov yam ntxwv ntawm tag nrho cov tshuab. Yog tias lub tshuab hloov kho, nws yuav tsum tau muab tso rau ntawm lub rooj tsavxwm luam tawm kom yooj yim rau kev hloov ntawm qhov chaw; yog tias lub tshuab raug kho sab nraud, nws qhov chaw yuav tsum tau hloov mus rau qhov chaw ntawm qhov hloov kho pob qhov rooj ntawm lub chassis vaj huam sib luag.
5. yuav tsum tau tawm ntawm lub tshuab luam ntawv qhov chaw qhov chaw thiab cov hlua ruaj ruaj nyob ntawm qhov chaw.
Raws li lub functional unit ntawm lub Circuit Court. Kev teeb tsa ntawm txhua yam ntawm lub voj voog yuav tsum ua raws li cov hauv qab no.
1. Npaj qhov chaw ntawm txhua qhov chaw ua haujlwm hauv Circuit Court raws li qhov ntws ntawm lub voj voog, kom qhov kev teeb tsa ua kom lub teeb liab ncig thiab ua kom lub teeb liab nyob rau hauv tib txoj kev kom deb li deb tau.
2. Siv lub hauv paus tseem ceeb ntawm txhua qhov kev ua haujlwm hauv Circuit Court ua qhov chaw, thiab teeb tsa nyob ib puag ncig nws. Cheebtsam yuav tsum sib npaug, zoo zoo thiab compactly teem rau ntawm PCB. Txo thiab txo cov kev coj ua thiab kev sib txuas ntawm cov khoom.
3. Circuits kev khiav hauj lwm ntawm high zaus, xav txog kev faib tsis tau ntawm cov khoom. General circuit yuav tsum kom deb li deb tau kom cov khoom sib xyaw ua ke. Ua li no, tsis tsuas yog zoo nkauj. Thiab yooj yim rau assemble thiab solder. Yooj yim rau huab hwm coj ntau lawm.
4. Cov khoom siv nyob rau ntawm ntug ntawm lub rooj tsavxwm, los ntawm ntug ntawm lub rooj tsavxwm feem ntau tsis pub tsawg tshaj 2 hli. qhov zoo tshaj plaws zoo ntawm lub rooj tsavxwm yog rectangular. Length rau dav piv ntawm 3: 2 rau 4: 3. board nto loj dua 200x150mm. Yuav tsum xav txog lub zog txhua yam ntawm lub rooj tsavxwm.
Cov hauv paus ntsiab lus ntawm kev xaim yog raws li nram no.
1. Cov tswv yim thiab cov zis terminals nrog cov xaim yuav tsum sim kom tsis txhob muaj qhov sib npaug sib npaug. Nws yog qhov zoo tshaj rau ntxiv hauv av interline kom tsis txhob tawm tswv yim coupling.
2. Qhov tsawg kawg nkaus qhov dav ntawm cov ntawv sau npe yog txiav txim siab los ntawm kev ua kom lub zog ntawm cov hlau thiab cov txheej txheem insulated thiab cov nqi tam sim no ntws los ntawm lawv. Thaum lub thickness ntawm tooj liab ntawv yog 0 05 hli, qhov dav ntawm 1 ~ 15 hli. Qhov kub yuav tsis siab tshaj 3 degree rau tam sim no ntawm 2A, yog li ntawd. Tus neeg xyuas pib dav ntawm 1.5mm tuaj yeem ua tau raws li qhov yuav tsum tau ua. Rau kev sib xyaw ua ke, tshwj xeeb tshaj yog digital circuits, feem ntau xaiv 0.02 ~ 0.3mm hlau dav. Tau kawg, ntev li ntev tau, lossis ntev li ntev tau nrog txoj kab dav. Tshwj xeeb tshaj yog cov kab hluav taws xob thiab hauv av. Qhov tsawg kawg nkaus qhov sib txawv ntawm cov xaim feem ntau yog txiav txim siab los ntawm qhov phem tshaj plaws ntawm cov rwb thaiv tsev tiv thaiv thiab kev tawg hluav taws xob ntawm cov kab. Rau kev sib xyaw ua ke, tshwj xeeb tshaj yog cov digital circuits, ntev npaum li cov txheej txheem tso cai, qhov sib txawv tuaj yeem ua me me li 5 txog 8 hli.
3. Cov kab ntawv luam tawm feem ntau yog muab sib npaug, thaum lub kaum sab xis lossis lub kaum sab xis ntawm lub voj voog ntau zaus yuav cuam tshuam rau kev ua haujlwm hluav taws xob. Tsis tas li ntawd, sim kom tsis txhob siv thaj tsam loj ntawm cov ntawv ci tooj liab, txwv tsis pub. Thaum rhuab rau ib lub sij hawm ntev, cov ntawv ci tooj liab yog qhov ua rau nthuav dav thiab qhov tshwm sim tshwm sim. Yuav tsum siv thaj tsam loj ntawm cov ntawv ci tooj liab, nws yog qhov zoo tshaj plaws los siv daim phiaj duab. Qhov no yuav pab kom tshem tawm cov roj tsis hloov pauv uas tsim los ntawm cov cua sov ntawm cov nplaum ntawm cov ntawv ci tooj liab thiab cov substrate.
Lub qhov nruab nrab ntawm lub ncoo yuav tsum yog me ntsis loj dua li cov khoom siv lead ua kab. Lub ncoo loj dhau thiab yooj yim los tsim ib qho khoom cuav. Solder pad sab nraud txoj kab uas hla D yog feem ntau tsis tsawg dua (d ntxiv rau 1.2) hli, qhov twg d yog cov hlau lead aperture. Rau high-density digital circuits, qhov tsawg kawg nkaus txoj kab uas hla ntawm lub ncoo tuaj yeem yog (d ntxiv rau 1.0) mm.
