電子產(chǎn)品工藝調(diào)頻收音機(jī)分析

PingdingshanIndustrialCollegeofTechnology

BTECHNDinElectrical/ElectronicEngineering

Unit21AdvancedComputer-AidedDesignTechniques

Assignment

NameofStudent

SunXinya

UnitTitle

Unit30:ManufacturingElectronicProducts

AssignmentTitle

Thyristordimmingcircuitdesignandfabricatio

AssignmentNo

Assignment2

NameofTutor

Tonghuigao

NameofInternalVerifier

SubmissionDeadline

May15,.

OutcomesandAssessmentCriteria

Outcome

AssessmentCriteria

Feedback

Tutor’sdecision

InternalVerification

3Describethedesign，

manufactureandtestingofPrintedCircuitBoards

Discussthedesignandsimulationofsingle-and

multi-layerPCBs

3a

4Investigatethemethodsofassemblingelectronicproducts

DescribethemethodsoftestingcompletedPCBsandfinishedelectronicproducts

4a

MeritGradeCriteria

MeritDescriptors

IndicativeCharacteristics

Feedback

Tutor’sdecision

InternalVerification

M1identifyandapplystrategiestofindappropriatesolutions

PCBboardlayoutwillbeacomprehensiveanalysisoftherules.

M1b

M2select/designandapplyappropriate

methods/techniques

PCBboardlayoutintegratedapplicationoftheprinciplesandrequirements,drawthyristordimmingcircuitPCBmap.

M2b

M3presentand

communicateappropriatefindings

Inthewaveformmeasurementreports,graphicsandsymbolsmarkedcorrectly.

M3b

DistinctionGradeCriteria

DistinctionDescriptors

IndicativeCharacteristics

Feedback

Tutor’sdecision

InternalVerification

D1usecriticalreflectiontoevaluateownworkandjustifyvalidconclusions

Consolidatedexistingknowledgeandobservations,drawnwaveforms.

D1a

TheuseoflayoutprinciplesdrawncorrectlyassesstheirownstrengthsandweaknessesofPCBboard.

D1b

D3demonstrateconvergent/lateral/creativethinking

Generaldescriptionoflaboratory-sidedPCBversionoftheproductionprocess。

D3c

ProductiontomeettherequirementsofthethyristordimmingcircuitPCB.

D3d

Internalverificationofassignmentbrief(finalagreedversion)

IVname

Date

Iconfirmthatthisisallmyownwork

Studentsignature

Professor’ssummativefeedbackandcomments

Signature

Date

Student’scommentsonprofessor’sfeedback

Signature

Date

ANSWERALLTASKS

Scenario:

Youhavebeengivenworkexperienceinanengineeringfirmandtheseniordesignengineerhasgivenyouthefollowingtaskstoperform.

Task1:

ⅰ)PCBboardlayoutshouldfollowthegeneralprinciplesofwhat?

1.Layoutaretwoways,oneisaninteractivelayout,theotheristheautomaticlayout,thelayoutisgenerallybasedontheautomaticlayoutwithinteractiveadjustmentofthelayoutcanbethecaseunderthedoorcircuittracesre-Distribution,theexchangeofthetwogates,makingiteasytoroutethebestlayout.

2.Thesuccessofaproduct,itisnecessarytopayattentiontotheintrinsicquality,andsecond,takingintoaccounttheoverallappearance,bothcanbemoreperfectthattheproductissuccessful.InaPCBboard,componentlayoutrequirementsshouldbebalanced,densityandorderly,nottop-heavyorasink.

顯示相應(yīng)旳拉丁字符旳拼音

字典

名詞

component

element

cell

ⅱ)PCBboardlayoutshouldfollowthegeneralprinciplesofwhat?

1,theremustbeareasonabledirection:suchasinput/output,AC/DC,strong/weaksignal,highfrequency/lowfrequency,high/low,etc....,theyaretobelinearly(orseparation),noteachotherblend.Theaimistopreventmutualinterference.Thebestdirectionisastraightline,butingeneralnoteasytoachieve,themostunfavorabletothering.

2,thechoiceofagoodground.

3,therationalarrangementofpowersupplyfiltering/decouplingcapacitors.

4,thelinesareabout:notqualifiedtodowidelinesandmeticulous;pressureandGardenslipfrequencylineshouldnothavesharpchamfering,turningandshallnotuserightangle.Groundshouldbeaswideaspossible,preferablyusingalargeareadepositionofcopper,

5,thedesignshouldminimizetheholeovertheline.Withthedensityoftheparallellinestooeasilyweldedtogetherintoone.Therefore,thelineardensityshouldbeconsideredtodeterminethelevelofweldingtechnology.Thedistanceistoosmalljoints,isnotconducivetomanualwelding,canonlyreducetheefficiencytosolvetheweldingquality.

Task2:

ⅰ)drawtheirownthyristordimmingcircuitdiagramdisplayedinthefollowing

。

ⅱ)drawtheirownPCBthyristordimmingcircuitdiagramdisplayedinthefollowing

。

Task3:Accordingtotheoscilloscopemeasurements,thecorrespondingpointinthetablebelowthewaveformplot

。

VoltageName

Observationpoint

Waveform

Afterthepulsatingvoltagebridgerectifier

1—0

Trapezoidvoltagesynchronous

2—0

Sawtoothvoltage(Rplarger)

3—0

Sawtoothvoltage(Rpsmall)

3—0

Outputpulse(Rplarger

）

4—0

Outputpulse(Rpsmall)

4—0

Anodevoltage(Rpsmall)

5—0

Voltageacrossthelamp(Rplarger)

1—5

Task4:Descriptionthyristordimmingcircuitproductionprocessofsingle-sidedPCBversion

。

Cutting→Patterntransfer→Etching→Removalofprintedmaterials→Drilling→Printingsolder→Spraytin→Indiancharacters→Inadditiontothefluxcoating→Check→Finished

GeneralNotestostudents:

·Completethecoversheetandsignthestatementofauthenticity.

·UsetheHarvardreferencingsystem.Takegreatcarethatifyouuseotherpeople’sworkorideasinyourassignment,youproperlyreferencethem