Download - ECE 477 Final Presentation Group 6 Spring 2005 Mike Lowe Eric SuJohn Parlindungan KamBiu Chan
ECE 477 Final Presentation ECE 477 Final Presentation Group 6 Group 6 Spring 2005 Spring 2005
Mike Lowe
Eric Su John Parlindungan
KamBiu Chan
OutlineOutline
• Project overviewProject overview• Block diagramBlock diagram• Professional componentsProfessional components• Design componentsDesign components• Success criteria demonstrationsSuccess criteria demonstrations• Individual contributionsIndividual contributions• Project summaryProject summary• Questions / discussionQuestions / discussion
Project OverviewProject Overview• Arbuckle’s Automatic Pet FeederArbuckle’s Automatic Pet Feeder• Dream machine for every pet loverDream machine for every pet lover• Deliver a controlled amount of food to 4 different Deliver a controlled amount of food to 4 different
cats for up to 20 days without any user maintenance.cats for up to 20 days without any user maintenance.• FeaturesFeatures
– RFID pet identificationRFID pet identification– Remote monitoring through EthernetRemote monitoring through Ethernet– Local user interface (LCD and RPG)Local user interface (LCD and RPG)
Block DiagramBlock Diagram
MicrocontrollerErgosFeeder
IR Level Detector
RelayCircuit
User Interface
LCD
RPG
SCI
I/O
InternetPC
RFIDReader
RFID
SCI
I/O
I/O
Professional ComponentsProfessional Components
• Constraint analysis and component selection Constraint analysis and component selection rationalerationale
• Patent liability analysisPatent liability analysis• Reliability and safety analysisReliability and safety analysis• Ethical and environmental impact analysisEthical and environmental impact analysis
Constraint Analysis and Constraint Analysis and Component Selection RationaleComponent Selection Rationale
• Constraint Analysis– Computation Requirement
• Speed• Memory
– Interface Requirements• SCI for LCD and RFID• Ethernet connectivity
– Power Supply Constraints– Packaging Constraints– Cost Constraints
Constraint Analysis and Constraint Analysis and Component Selection RationaleComponent Selection Rationale
• Component Selection Component Selection RationaleRationale– MicrocontrollerMicrocontroller
– RFID ModuleRFID Module
Freescale 9SHC12NE64Freescale 9SHC12NE64 Rabbit 3000Rabbit 3000
SpeedSpeed 25Mhz25Mhz 54Mhz54Mhz
MemoryMemory 64kb64kb 256kb256kb
EthernetEthernet Internal TransceiverInternal Transceiver External TransceiverExternal Transceiver
Series 2000 LF RFIDSeries 2000 LF RFID S4100 multi-functionS4100 multi-function
FrequencyFrequency 134.2kHz134.2kHz 134.2kHz – 13.56MHz134.2kHz – 13.56MHz
RangeRange 15cm15cm 12cm12cm
AntennaAntenna ExternalExternal InternalInternal
Constraint Analysis and Constraint Analysis and Component Selection RationaleComponent Selection Rationale
• Component Selection Rationale Cont’dComponent Selection Rationale Cont’d– LCD DisplayLCD Display
– Rotary Pulse GeneratorRotary Pulse Generator• Grayhill 61C11Grayhill 61C11• Optical encoder with pushbuttonsOptical encoder with pushbuttons• Small number of input pinsSmall number of input pins• Economy of spaceEconomy of space
– Pet Food DispenserPet Food Dispenser• Augger style dispenserAugger style dispenser
CrystalFontz 634CrystalFontz 634 CrystalFontz CFAH2004A CrystalFontz CFAH2004A
InterfaceInterface RS232 (serial)RS232 (serial) 8-bit or 4-bit (parallel)8-bit or 4-bit (parallel)
SizeSize 20x420x4 20x420x4
Patent Liability AnalysisPatent Liability Analysis• Literal InfringementsLiteral Infringements
– 4,510,4954,510,495: : Remote passive identification system Remote passive identification system • Recommend to continue with developmentRecommend to continue with development
• Doctrine of Equivalents InfringementDoctrine of Equivalents Infringement– 6,793,1276,793,127: Internet enabled resource constrained : Internet enabled resource constrained
terminal for processing RFID tagsterminal for processing RFID tags• Recommend to continue with developmentRecommend to continue with development
Reliability/Safety AnalysisReliability/Safety Analysis
• 4 critical components analyzed4 critical components analyzed– Micrel 4690 Power Regulator – MTTF 105 Micrel 4690 Power Regulator – MTTF 105
yearsyears– Grayhill 61C11 RPG – 1285 yearsGrayhill 61C11 RPG – 1285 years– Motorola MC9S12NE64 – MTTF 21 yearsMotorola MC9S12NE64 – MTTF 21 years– Reed Relay Circuit – MTTF 190 yearsReed Relay Circuit – MTTF 190 years
• High criticality failuresHigh criticality failures– Voltage regulator power supplyVoltage regulator power supply– Reed Relay 120V Power CircuitReed Relay 120V Power Circuit
Ethical/Environmental AnalysisEthical/Environmental Analysis
• Ethical IssuesEthical Issues– Protect electrical components from cats and human.Protect electrical components from cats and human.– SW updates through internet to correct any possible SW updates through internet to correct any possible
firmware errors.firmware errors.– Warning label on main board enclosure (Proper Care for Warning label on main board enclosure (Proper Care for
the Cats!!!)the Cats!!!)– Low food volume alertLow food volume alert
• Environmental IssuesEnvironmental Issues– PCB fabrication (high material consumption) & disposal PCB fabrication (high material consumption) & disposal
(lead, hazardous waste)(lead, hazardous waste)• Dry plasma metal deposition Dry plasma metal deposition
Design ComponentsDesign Components
• Packaging design considerationsPackaging design considerations• Schematic design considerationsSchematic design considerations• PCB layout design considerationsPCB layout design considerations• Software design considerationsSoftware design considerations
Packaging DesignPackaging Design• Weight: 15 lbsWeight: 15 lbs• Cost: $880.00Cost: $880.00• Two ArchitecturesTwo Architectures
– Feeder ArchitectureFeeder Architecture– Control Unit Control Unit
ArchitectureArchitecture• Primary ConsiderationsPrimary Considerations
– SafetySafety– AestheticsAesthetics– FunctionalityFunctionality– DurabilityDurability
Packaging DesignPackaging Design
Packaging DesignPackaging Design
Schematic DesignSchematic Design• MC9SHC12NE64MC9SHC12NE64
– Guarded with 0.22uF decoupling capacitorsGuarded with 0.22uF decoupling capacitors– BDM Port: For firmware update– ATD Port: IR sensor array– SCI Port: RFID reader, LCD– General IO: Relay– Timer Capture: RPG– Ethernet Port: Web access
Schematic DesignSchematic Design• Voltage RegulatorVoltage Regulator
– 2 Step down regulators2 Step down regulators– 12VDC unregulated input 12VDC unregulated input – 5V and 3V DC regulated output5V and 3V DC regulated output
Schematic DesignSchematic Design
• RS 232 TransceiverRS 232 Transceiver– Interface 3.3V SCI ports to Interface 3.3V SCI ports to
external 5V serial external 5V serial connectionconnection
– Provide health information Provide health information about the connectionsabout the connections
Schematic DesignSchematic Design• RPGRPG
– Optical encoderOptical encoder– Standard Quadrature 2-Bit CodeStandard Quadrature 2-Bit Code– 8 Changes per revolution8 Changes per revolution
• Relay controlRelay control– Optically isolatedOptically isolated– 120 AC Power Relay120 AC Power Relay– Power MOSFET switch with diodePower MOSFET switch with diode
Schematic DesignSchematic Design• IR SensorsIR Sensors
– 4 sensors monitoring 2 different levels of the food 4 sensors monitoring 2 different levels of the food containercontainer
– Output 0.1 – 2VOutput 0.1 – 2V– Socket based for flexibilitySocket based for flexibility
PCB Layout DesignPCB Layout Design
• 7.5” X 3.5”7.5” X 3.5”• Trace width:Trace width:
– 3.3V and 5V 3.3V and 5V GND and GND and Vcc rails: Vcc rails: 50mils 50mils
– Normal Normal wires: wires: 12mils12mils
PCB Layout DesignPCB Layout Design
• Decoupling caps for all ICsDecoupling caps for all ICs• Copper pour under relayCopper pour under relay• Separate power supply for Separate power supply for
analog and digital systemanalog and digital system• Physical isolation of the digital Physical isolation of the digital
and the analog systemand the analog system
Software DesignSoftware Design
• State machine drives menuState machine drives menu• Polling for RFIDPolling for RFID• All Others interrupt driven All Others interrupt driven • Software ModulesSoftware Modules
– Timer_isrTimer_isr– Rfid_isrRfid_isr– Lcd_isrLcd_isr– Button_isrButton_isr– Rpg_isrRpg_isr– Update_webUpdate_web
Software DesignSoftware Design
Software DesignSoftware Design
Success Criteria DemonstrationsSuccess Criteria Demonstrations
1.1. An ability to receive and decode RFID tags from the An ability to receive and decode RFID tags from the cats cats
2.2. An ability to accurately dispense food for each cat An ability to accurately dispense food for each cat demodemo
3.3. An ability to remotely monitor the system via web An ability to remotely monitor the system via web browser browser demodemo
4.4. An ability to interact with user via LCD display and An ability to interact with user via LCD display and rotary pulse generator rotary pulse generator demodemo
5.5. An ability to alert on low food volumeAn ability to alert on low food volume
Individual ContributionsIndividual Contributions
• Team Leader – KamBiu ChanTeam Leader – KamBiu Chan• Team Member 2 – Mike LoweTeam Member 2 – Mike Lowe• Team Member 3 – Eric SuTeam Member 3 – Eric Su• Team Member 4 – John ParlindunganTeam Member 4 – John Parlindungan
Team Leader – KamBiu ChanTeam Leader – KamBiu Chan
• PCB Layout DesignPCB Layout Design• Patent AnalysisPatent Analysis• Schematic DesignSchematic Design• Software Design and Testing (Peripherals)Software Design and Testing (Peripherals)• Hardware TestingHardware Testing
Member 2 – Mike LoweMember 2 – Mike Lowe
• Design Constraint AnalysisDesign Constraint Analysis• Software Design Software Design
– Main ProgramMain Program– EthernetEthernet
Member 3 – Eric SuMember 3 – Eric Su
• Packaging DesignPackaging Design• Reliability and Safety AnalysisReliability and Safety Analysis• Software Debugging and TestingSoftware Debugging and Testing• Team WebmasterTeam Webmaster
Member 4 – John ParlindunganMember 4 – John Parlindungan
• Schematic DesignSchematic Design• Ethical and Environmental Impact AnalysisEthical and Environmental Impact Analysis• Populating PCB Populating PCB • Hardware DebuggingHardware Debugging
Project SummaryProject Summary
• Important lessons learnedImportant lessons learned– Current Limiting Resistors!!!Current Limiting Resistors!!!– Debug Header is a MUST!!!Debug Header is a MUST!!!– Division of labor and individual Division of labor and individual
accountabilityaccountability– Understand components’Understand components’
soldering temperature limitssoldering temperature limits
Project SummaryProject Summary
• Second iteration enhancementsSecond iteration enhancements– Sonar for inventory trackingSonar for inventory tracking– Web administration capabilityWeb administration capability– Providing more than 1 kind of pet foodProviding more than 1 kind of pet food– WebcamWebcam– Diet LogDiet Log
Questions / DiscussionQuestions / Discussion