Yuav Paub
- Tshuaj xyuas kev puas tsuaj, kuaj cov pa luam yeeb lossis tsw ntxhiab, mloog cov suab tsis ua haujlwm, thiab sim cov khoom sib txawv.
- Feem ntau ua rau cov khoom siv hluav taws xob tsis ua haujlwm suav nrog overheating, corrosion, hluav taws xob kev ntxhov siab, thiab kev tsim khoom tsis raug.
- Txawm kom txo tau txoj kev pheej hmoo ntawm kev puas tsuaj loj, niaj hnub tshuaj xyuas qhov chaw paub tias ua tsis tiav tom qab qee lub sijhawm lossis siv.
Kab lus no hais txog yuav ua li cas txheeb xyuas cov khoom siv hluav taws xob tsis ua haujlwm, feem ntau yog vim li cas cov khoom siv hluav taws xob tsis ua haujlwm, thiab cov lus qhia rau kev tiv thaiv tsis ua haujlwm hauv cov khoom siv hluav taws xob.
Yuav ua li cas txheeb xyuas qhov ua tsis tiav
Thaum ib qho khoom ua tsis tiav, muaj ob peb qhov ntsuas uas tuaj yeem txheeb xyuas cov khoom uas ua tsis tau thiab pab daws teeb meem cov khoom siv hluav taws xob.
- Pom qhov muag tshuaj xyuas qhov kev puas tsuaj. Ib qho kev qhia pom tseeb tias ib feem ua tsis tiav yog los ntawm kev tshuaj xyuas qhov muag. Cov khoom ua tsis tiav feem ntau muaj qhov chaw hlawv lossis melted, los yog muaj bulged thiab nthuav. Capacitors feem ntau bulged tawm, tshwj xeeb tshaj yog electrolytic capacitors nyob ib ncig ntawm cov hlau saum. Cov pob khoom sib xyaw ua ke (IC) feem ntau muaj qhov me me uas kub hnyiab tau qhov chaw kub ntawm cov khoom siv vaporized cov yas tag nrho los ntawm pob IC.
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Tshawb xyuas cov pa taws lossis tsw tsw. Thaum cov khoom ua tsis tiav, lub thermal overload feem ntau tshwm sim, ua rau cov pa luam yeeb xiav thiab lwm cov pa luam yeeb muaj yeeb yuj tso tawm los ntawm cov khoom ua txhaum cai. Cov pa luam yeeb muaj cov ntxhiab tsw txawv thiab txawv ntawm hom kev tivthaiv. Qhov no feem ntau yog thawj qhov cim qhia ntawm kev tiv thaiv tsis ua haujlwm dhau ntawm lub cuab yeej tsis ua haujlwm. Feem ntau cov ntxhiab tsw txawv ntawm cov khoom ua tsis tau zoo nyob ib puag ncig ntawm cov khoom siv rau hnub lossis lub lis piam, uas tuaj yeem pab txheeb xyuas cov khoom ua txhaum cai thaum daws teeb meem.
- Mloog cov suab tsis ua haujlwm. Qee zaum ib feem yuav ua suab nrov thaum nws ua tsis tiav. Qhov no tshwm sim ntau zaus nrog thermal tsis ua haujlwm sai, dhau-voltage, thiab dhau-tam sim no cov xwm txheej. Thaum ib feem ua tsis tau qhov no hnyav, ib qho tsw qab feem ntau nrog rau qhov tsis ua haujlwm. Kev hnov lus tsis zoo yog qhov tsawg dua. Nws feem ntau txhais tau hais tias cov khoom ntawm cov khoom yog xoob hauv cov khoom, yog li kev txheeb xyuas cov khoom ua tsis tau zoo tuaj yeem nqes los nrhiav seb cov khoom twg tsis nyob ntawm PCB lossis hauv qhov system.
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Tam sim cov khoom ntiag tug. Qee lub sij hawm tib txoj hauv kev los txheeb xyuas qhov ua tsis tiav yog sim nws. Cov txheej txheem no tuaj yeem nyuaj rau PCB vim tias lwm cov khoom tuaj yeem cuam tshuam qhov ntsuas. Vim tias kev ntsuas cuam tshuam nrog kev siv hluav taws xob me me lossis tam sim no, lub voj voog yuav teb rau nws thiab kev nyeem ntawv yuav raug muab pov tseg. Yog tias lub kaw lus siv ntau qhov sib txuas, hloov cov no feem ntau yog ib txoj hauv kev kom txo qis qhov teeb meem nrog lub kaw lus nyob.
kab lus no piav qhia
Cas of Component Failure
Qhov tsis ua haujlwm, thiab hluav taws xob tawg. Kev tsim qauv zoo tuaj yeem zam qee qhov ua tsis tiav, tab sis ntau yam tsuas yog tawm ntawm koj txhais tes. Kev txheeb xyuas qhov ua txhaum cai thiab vim li cas nws yuav ua tsis tiav yog thawj kauj ruam hauv kev txhim kho tus qauv tsim thiab ua kom muaj kev ntseeg siab ntawm lub kaw lus uas ua rau muaj kev cuam tshuam ntau dua.
Muaj ntau yam laj thawj vim li cas cov khoom tsis ua haujlwm. Qee qhov ua tsis tiav yog qeeb thiab zoo nkauj, muab sijhawm los txheeb xyuas cov khoom thiab hloov nws ua ntej nws ua tsis tiav. Lwm qhov kev ua tsis tiav yog nrawm, hnyav, thiab tsis tau xav txog.
Qee yam laj thawj rau cov khoom ua tsis tiav suav nrog:
- Nyiaj
- Kev tsim hluav taws xob tsis zoo
- Cascading tsis ua hauj lwm
- Hloov hauv qhov chaw ua haujlwm
- Kev sib txuas tsis raug
- Kev sib txuas tsis ua haujlwm
- Kev tsis sib haum xeeb
- Corrosion
- kev nyuaj siab
- Electrostatic tso tawm
- Kev tsim khoom tsis raug
- Mechanical shock
- Mechanical stress
- Nyob rau
- Kub dhau
- Overvoltage
- Oxidation
- Packaging defects
- Radiation
- kev nyuaj siab
Cov khoom tsis ua haujlwm feem ntau ua raws li qhov sib txawv. Nyob rau hauv lub neej thaum ntxov ntawm lub tshuab hluav taws xob, cov khoom tsis ua haujlwm feem ntau muaj ntau dua thiab muaj feem cuam tshuam tsis ua haujlwm raws li cov khoom siv. Yog vim li cas rau qhov poob ntawm cov nqi tsis ua hauj lwm yog tias cov khoom uas muaj cov ntim, soldering, thiab kev tsim khoom tsis zoo feem ntau ua tsis tiav nyob rau hauv feeb lossis teev ua ntej siv lub cuab yeej. Qhov no yog vim li cas ntau manufacturers suav nrog ob peb teev hlawv-hauv lub sijhawm rau lawv cov khoom. Qhov kev sim yooj yim no tshem tawm qhov kev pheej hmoo ntawm cov khoom tsis zoo los ntawm cov txheej txheem tsim khoom, ua rau cov cuab yeej tawg hauv cov sij hawm ntawm kev yuav khoom.
Tom qab lub sijhawm pib kub hnyiab, cov khoom ua haujlwm tsis ua haujlwm feem ntau hauv qab thiab tshwm sim random. Raws li cov khoom muaj hnub nyoog, cov tshuaj tiv thaiv ntuj txo qhov zoo ntawm cov ntim, cov xov hlau, thiab cov khoom siv. Mechanical thiab thermal cycling kuj tseem cuam tshuam rau lub zog ntawm cov khoom. Cov yam ntxwv no ua rau qhov tsis ua haujlwm nce ntxiv raws li cov khoom muaj hnub nyoog. Qhov no yog vim li cas kev ua tsis tiav feem ntau raug cais los ntawm lub hauv paus ua rau lossis thaum nws ua tsis tiav hauv lub neej ntawm cov khoom.
Koj tuaj yeem txo qhov kev pheej hmoo ntawm kev puas tsuaj loj los ntawm kev tshuaj xyuas qhov chaw paub tias ua tsis tiav tom qab qee lub sijhawm lossis kev siv. Piv txwv li, nyob rau hauv kev lag luam aviation, cov khoom tseem ceeb raug hloov tom qab ua haujlwm rau ib lub sijhawm tshwj xeeb, tsis hais seb cov khoom puas qhia pom tias muaj kev ntxhov siab lossis kev puas tsuaj.
