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Senior Design Senior Design

Senior Design - PowerPoint Presentation

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Uploaded On 2016-12-08

Senior Design - PPT Presentation

Hardware Presentation David Anthony Outline CraneTracker Project Hardware Design Design Software Fabrication Process CraneTracker Needed connectivity for highly mobile target Limited energy reserves ID: 498795

process design battery power design process power battery connection solar layout cranetracker fabrication lipo rule components schematic you

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Presentation Transcript

Slide1

Senior DesignHardwarePresentation

David AnthonySlide2

OutlineCraneTracker Project

Hardware Design

Design Software

Fabrication ProcessSlide3

CraneTrackerNeeded connectivity for highly mobile targetLimited energy reserves

Long term mission

Light weightSlide4

CraneTracker CapabilitiesGSM Connection

Integrated GPS

Solid State Compass

Solar Recharging

Iris Connection

Lithium Polymer BatterySlide5

GSM ConnectionTelit GE-865 module

UART Communications

External SIM CardSlide6

GPS MediaTek MT-3329 Module

Integrated Antenna

NMEA 0183 Connection

Interchangeable with many other solutionsSlide7

Solid State CompassHoneywell HMC-6343Heading, pitch, roll

3D Acceleration

Temperature

Not just magnetometerSlide8

Solar RechargingMCP-73831Needed for

LiPo

battery

Not just for solar recharging

USB

Battery

7V MaximumSlide9

Iris Connection51 Pin Hirose DF-9Can be used with most motes in lab

Iris provides microcontroller, flash,

ZigBeeSlide10

LiPo BatteryCan use any single cell battery

Why

LiPo

?

High energy density

Flat discharge characteristics

3.7V nominal voltageSlide11

Design ConsiderationsConnectivity needsSensing needs

Processing & Storage

Power supply needs

Driven by other considerations

Possibly most challenging part

RF NeedsSlide12

ConnectivityMobilityCost

RangeSlide13

SensingWhat do your clients want?What do you need?

Had to add current and voltage detectors to crane projectSlide14

Processing and StorageKeep it simpleUse motes in lab if possible

Mission duration?Slide15

Power SupplyConsider your power sourceSnow plow, several options

Pheasant team, probably solar

What are the differences?

What are your power needs?

GSM has high peak power consumption

GPS is also power hungry

Microcontroller, compasses, are negligible

How sensitive are components?Slide16

Radio FrequencyCan be extremely difficultHard to replicate problems

Hard to testSlide17

Design ProcessCraneTracker was designed completely in

Altium

EE Department has licenses for the labs

Eagle is your best free solutionSlide18

Design Process Part 1Gather requirementsChoose components

Examine requirements of those componentsSlide19

Design Process Part 2Design schematicDefines logical connections

Does

not

describe physical layout

Mistakes made here are extremely difficult to correct

Plan to spend a lot of time here

Use independent reviews to ensure accuracySlide20

Schematic ViewSlide21

LayoutThe physical realization of your schematicNot as fun as it sounds

Correctly implemented schematics ensure the automatic rule checkers detect your problems hereSlide22

LayoutSlide23

PCB LayoutDefining different layers of boardFabrication process is like developing a photograph

Top & Bottom Copper

Silkscreens

SoldermasksSlide24

Design Rule CheckerThis will save youDefine the rules you want your design to conform to

Minimum widths

Neckdown

rules

Finds erroneous connectionsSlide25

Fabrication ProcessSo you’ve got a design…First question:

How much of the process do you want done?

How much of the process can you

afford

?

Who is going to make it for you?

In the past, have used Advanced Circuits

Based in Colorado, so fast shipping

Great student deals

Advanced Circuits can do whole board assembly

Best if you’re going to make a lotSlide26

Fabrication, cont.From your design, create Gerber files and NC drill filesMachine readable descriptions of your process

Each layer has its own Gerber file

Submit design to fab house

Most will run their own rule checker

Can produce many false positives

But when they don’t…

Wait 1-2 weeks

Anticipate this in your schedules

Find out everything you’ve done wrong

Go back

to beginning