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 CR2Sensor Voltage

RangePeak 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 Knob

Simplicity 3 2 2 1 = Least Simple

Cost Free Cheap Cheap

Size None 2 1 1 = Smaller

# of Options Inf 4-8 4-8 # of Options

Ease 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 PSoC

Cost 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 1

Concept # 1

Power Source Coin Cell

Start CaptureReed Switch

Stop Capture

Sensor Connection 4-Wire

Set Sampling Rate Switches

Mount Device Drill Holes

High Pressure Plastic

High Temp Insulated

Oily Env. Mold

Data Storage microSD

Processor μC

Data Access Screws

Sample Bit Width 12-bit

Sample Rate 5kHz

CONCEPT 2

Concept # 2

Power Source UltraCap

Start Capture Power On

Stop Capture Timer

Sensor Connection BNC

Set Sampling Rate Software

Mount Device Velcro

High Pressure Metal

High Temp Passive

Oily Env. Gasket

Data Storage SD

Processor DSP

Data Access USB

Sample Bit Width 16-bit

Sample Rate 20kHz

CONCEPT 3

Concept # 3

Power Source LiPo

Start CaptureTimer

Stop Capture

Sensor Connection Ethernet

Set Sampling Rate Knob

Mount Device Magnet

High Pressure Plastic

High Temp Active

Oily Env. Sealed Connectors

Data Storage SD

Processor PSoC

Data Access Screws

Sample Bit Width 12-bit

Sample Rate 200kHz

CONCEPT 4

Concept # 4

Power Source UltraCap

Start Capture Reed Switch

Stop Capture Timer

Sensor Connection 4-Wire

Set Sampling Rate Digital Knob

Mount Device Magnet

High Pressure Composite

High Temp Insulated/Passive

Oily Env. Gaskets/Plugs

Data Storage microSD

Processor μC

Data Access USB

Sample Bit Width 16-bit

Sample Rate 10kHz

CONCEPT SELECTIONRevamped

DATUM: MSR145

DATUM MSR145Power Source LiPo

Start CaptureStop Capture

Manual/Sensor Trigger/Timer

Sensor Connection Internal/BNC

Set Sampling Rate Software

Mount Device Drill Holes

High Pressure Plastic

High Temp None

Oily Env. Optional Waterproof

Data Storage microSD

Processor μC

Data Access USB

Sample 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 CONCEPT

Concept # 4

Power Source UltraCap

Start Capture Reed Switch

Stop Capture Timer

Sensor Connection 4-Wire

Set Sampling Rate Digital Knob

Mount Device Magnet

High Pressure Composite

High Temp Insulated/Passive

Oily Env. Gaskets/Plugs

Data Storage microSD

Processor μC

Data Access USB

Sample 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.