P14452: Systems Design Review
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Transcript of P14452: Systems Design Review
P14452:SYSTEMS DESIGN REVIEWTake Two
OVERVIEW• Updates
• Engineering Specifications• Morph Chart
• Concepts• Development• Presentation• Selections
• Action Items
NEW SPECIFICATIONS
Number Source Name Measure Units Minimum Ideal Maximum
ES7.1 CR2 Start Capture Present Binary FALSE TRUE TRUE
ES7.2 CR2 Stop Capture Present Binary FALSE TRUE TRUE
ES12.1 CR3 Voltage Accuracy ADC Accuracy mV / LSB 5 10 10
ES16 CR2 Sensor Voltage Range Peak to Peak Volts -10V - 10V
UPDATED MORPH CHARTProblems 1 2 3 4 5 6
Power Source Li-ION LiPo NiMH UltraCapacitor Coin Cell
Start Capture Power On Timer Reed Switch Wireless Sensor Trigger
Stop Capture PowerOff Timer Reed Switch Wireless Sensor Trigger
Sensor Connection Permanent BNC S-Video/PS/2 Ethernet (RJ-45) Phone (RJ-11) 4-Wire Audio
Set Sampling Rate Software Switches Digital Knob
Mount Device Drill Holes Magnet Velcro Glue High Pressure Diamond Metal Plastic Composites
High Temp Insulated Active Cooling Passive Cooling
Oily Env. Molded Case Gaskets Leak-Proof Connectors
Data Storage NAND Flash SD microSD CF Card Processor μC DSP FPGA PSoC
Data Access Screws USB
CONCEPT DEVELOPMENTRevisited
FUNCTIONAL DECOMPOSITION
HARDWARE TREE
POWER SOURCES
Criteria Li-Ion LiPo NiMH Ultra Capacitor Coin Cell
Size 3 2 3 1 1 1 = Smallest
Capacity 3 2 2 2 1 1 = Lowest
Voltage 3.7V 3.7V-3.8V 1.25V Variable 3.0V
Heat 2 3 2 1 1 1 = Coolest
Reusability 500-800 1000 500-1000 >1000 1 # Cycles
Charge Time 2 1 3 2 N/A 1 = Shortest
Weight 3 2 3 1 1 1 = Lightest
Cost $7 $8 $2 $10 $2
START/STOP CAPTURE
Criteria Power On Timer Reed Switch Wireless Sensor Trigger
Simplicity 3 2 3 1 1 1 = Least Simple
Cost Free Free/Cheap Cheap $40-$100 Free
Size None None/1 1 2 None 1 = Smaller
Memory Req. 3 2 1 1 1 1 = Least Mem Req
Ease of Use 3 2 3 2 1 1 = Easiest
SENSOR CONNECTORS
Criteria Permanent BNC S-Video/PS/2 Ethernet Phone 4-Wire Audio
Simplicity 3 3 2 2 2 2 1 = Least Simple
Cost Free $5 $2 $1 $1 $1
Size None 3 2 3 2 1 1 = Smallest
Conductors Variable 2 4/6 8 4 4 # Conductors
Commonality N/A 3 1 1 1 2 1 = Least Common
SAMPLING RATE SELECTION
Criteria Software Switches Digital KnobSimplicity 3 2 2 1 = Least Simple
Cost Free Cheap CheapSize None 2 1 1 = Smaller
# of Options Inf 4-8 4-8 # of OptionsEase of Use 2 1 2 1 = Easiest
DEVICE MOUNTING
Criteria Drill Holes Magnet Velcro Glue
Simplicity 1 3 2 3 1 = Least Simple
Cost 3 1 1 1 1 = Cheapest
Size 3 2 1 1 1 = Smallest
Secure 3 2 2 1 1 = Least Secure
Ease of Removal 2 3 3 1 1 = Least Easy
HIGH PRESSURE SOLUTIONS
Criteria Diamond Metal Plastic Composites
Cost 3 1 2 2 1 = Cheapest
Strength 3 2 1 3 1 = Weakest
Durbaility 3 2 2 2 1 = Least Durable
Weight 2 3 1 1 1 = Lightest
Machinability 3 1 1 2 1 = Easiest
HIGH TEMP SOLUTIONS
Criteria Insulate Active Cooling Passive Cooling
Cost 2 3 1 1 = Cheapest
Thermal Protection 2 3 2 1 = Least Protective
Durbaility 2 1 3 1 = Least Durable
Weight 1 3 2 1 = Lightest
Size 2 3 2 1 = Smallest
OILY ENVIRONMENT SOLUTIONS
Criteria Molded Gaskets Leak-Proof Conn.
Cost 1 2 3 1 = Cheapest
Thermal Protection 3 2 3 1 = Least Protective
Durbaility 3 1 2 1 = Least Durable
Weight 2 1 1 1 = Lightest
DATA STORAGE
Criteria NAND Flash SD microSD CF Card
Cost 3 1 2 2 1 = Cheapest
Capacity 1 3 2 1 1 = Lowest Capacity
Size 2 2 1 3 1 = Smallest
Complexity 3 2 1 3 1 = Least Complex
Durability 3 2 2 1 1 = Least Durable
PROCESSING AND CONTROL
Criteria μC DSP FPGA PSoCCost 1 2 3 2 1 = Cheapest
Speed 2 3 2 3 1 = Slowest
Size 1 2 3 2 1 = Smallest
Power 1 2 3 2 1 = Least Power
I/O Capacity 3 2 3 2 1 = Least Capacity
Simplicity 3 2 1 1 1 = Least Simple
CONCEPTSReinvented
CONCEPT 1Concept # 1
Power Source Coin CellStart Capture
Reed SwitchStop Capture
Sensor Connection 4-WireSet Sampling Rate Switches
Mount Device Drill HolesHigh Pressure Plastic
High Temp InsulatedOily Env. Mold
Data Storage microSDProcessor μC
Data Access ScrewsSample Bit Width 12-bit
Sample Rate 5kHz
CONCEPT 2Concept # 2
Power Source UltraCapStart Capture Power OnStop Capture Timer
Sensor Connection BNCSet Sampling Rate Software
Mount Device VelcroHigh Pressure Metal
High Temp PassiveOily Env. Gasket
Data Storage SDProcessor DSP
Data Access USBSample Bit Width 16-bit
Sample Rate 20kHz
CONCEPT 3Concept # 3
Power Source LiPoStart Capture
TimerStop Capture
Sensor Connection EthernetSet Sampling Rate Knob
Mount Device MagnetHigh Pressure Plastic
High Temp ActiveOily Env. Sealed Connectors
Data Storage SDProcessor PSoC
Data Access ScrewsSample Bit Width 12-bit
Sample Rate 200kHz
CONCEPT 4Concept # 4
Power Source UltraCapStart Capture Reed SwitchStop Capture Timer
Sensor Connection 4-WireSet Sampling Rate Digital Knob
Mount Device MagnetHigh Pressure Composite
High Temp Insulated/PassiveOily Env. Gaskets/Plugs
Data Storage microSDProcessor μC
Data Access USBSample Bit Width 16-bit
Sample Rate 10kHz
CONCEPT SELECTIONRevamped
DATUM: MSR145DATUM MSR145
Power Source LiPo
Start CaptureStop Capture Manual/Sensor Trigger/Timer
Sensor Connection Internal/BNC
Set Sampling Rate SoftwareMount Device Drill HolesHigh Pressure Plastic
High Temp None
Oily Env. Optional Waterproof
Data Storage microSDProcessor μC
Data Access USBSample Bit Width 12-bit
Sample Rate 50Hz
PUGH
Criteria 1 2 3 4 MSR145
Cost + s s +
DATUM
Size + + s +
Easy Data Access - s - s
Lead time + s - s
Accuracy + + + +
Easy to Setup s + + +
Durability s + s +
Robustness + s s +
Simple Design s s - -
+/- 5/1 4/0 2/3 6/1
CHOSEN CONCEPTConcept # 4
Power Source UltraCapStart Capture Reed SwitchStop Capture Timer
Sensor Connection 4-WireSet Sampling Rate Digital Knob
Mount Device MagnetHigh Pressure Composite
High Temp Insulated/PassiveOily Env. Gaskets/Plugs
Data Storage microSDProcessor μC
Data Access USBSample Bit Width 16-bit
Sample Rate 10kHz
ACTION ITEMSMoving Forward
COMPONENT SELECTION• Need to Choose
• Microcontroller• microSD card• Ultracapacitor• Attenuator Op-amp• Power Regulator• Cable Connectors• Component Parts
• Resistors• Capacitors
PROTOTYPING• Develop a Breadboard Design
• Existing Materials• Processor Development Board• Signal Generator
• Systems to Refine• Input Attenuation• Power Regulation
• Software• User Configuration• Sampling Routine• Filter Routine• Storage Routine
MATERIALS TESTING• Evaluate Materials
• Metals• Aluminum and Steel
• Plastics• Polysulfone• PVDF• PFA• Teflon PTFE
• Composites• Fiberglass and Carbon Fiber
• Target Measurements• Axial Strength (Pressure)• Elasticity (Pressure)• Thermal Conductivity (Temp)• Porosity (Oil)
SCHEMATIC CAPTURE• Circuit Schematics
• Microprocessor I/O• Power Regulation• Input Attenuator
• Simulations• Input Attenuator
• Frequency Response• Attenuation Performance
• Power Regulator• Noise Performance
• Initial PCB Layout
QUESTIONS?fin.