Different Conceptual Designs

Different Conceptual Designs

Designs for Further Consideration and Evaluation

BELT

VEST

NECKLACE

Concept Evaluation CriteriaDirectionally IntuitiveSimple User InterfaceOne Size Fits AllRecognizable Feedback to UserVersatileRelatively Inconspicuous

PUGH Method

NecklaceVestBelt/Fanny Pack

abcdef

ModularMagnetometer not in DesignMagnetometer IncludedVibrationActuation

Non Modular (Consolidation of Components)KEY

PUGH Method Concept Criteria ace bce ade bde acf bcf adf bdfSize + + + + S S S SWeight + + + + S S S SCost S S S S S S S SFeasibility S S S S S S S SComfort + + + + S S S SConspicuous Nature + + + + + + + +Usability S S S S S S S SVersatility + + + + + + + +Durability + + + + + + + +Communication Capability - + - + - - - -Ergonomic + + + + + + + +Attachment/Removal Ease + + + + + + + +Training Time S S S S S S S SConsistency S S + + S S + +Power Consumption S S S S S S S SHeat Dissipation - + - + - + - +Fashion Appeal S S S S S S S SSimplicity + - + - S - S -Direction Sensing S S + + S S + +Total Score Positives 9 0 11 2 5 6 7 8

Negatives 2 1 2 1 2 2 2 2

NECKLACE

PUGH Method Concept Criteria ace bce ade bde acf bcf adf bdfSize + + + + S S S SWeight + + + + S S S SCost S S S S S S S SFeasibility S S S S S S S SComfort + + + + S S S SConspicuous Nature + + + + + + + +Usability S S S S S S S SVersatility + + + + + + + +Durability + + + + + + + +Communication Capability - + - + - - - -Ergonomic + + + + + + + +Attachment/Removal Ease - - - - - - - -Training Time S S S S S S S SConsistency S S + + S S + +Power Consumption S S S S S S S SHeat Dissipation - + - + - + - +Fashion Appeal S S S S S S S SSimplicity S + S + S + S +Direction Sensing + + + + + + + +Total Score Positives 8 11 9 2 5 7 6 8

Negatives 3 1 3 1 3 2 3 2

VEST

PUGH Method Concept Criteria ace bce ade bde acf bcf adf bdfSize + + + + S S S SWeight + + + + S S S SCost S S S S S S S SFeasibility S S S S S S S SComfort + + + + S S S SConspicuous Nature + + + + + + + +Usability S S S S S S S SVersatility + + + + + + + +Durability + + + + + + + +Communication Capability - + - + - - - -Ergonomic + + + + + + + +Attachment/Removal Ease + + + + + + + +Training Time S S S S S S S SConsistency S S + + S S + +Power Consumption S S S S S S S SHeat Dissipation + + + + + + + +Fashion Appeal + + + + + + + +Simplicity S + S + S + S +Direction Sensing S S + + S S + +Total Score Positives 0 2 2 4 7 8 9 0

Negatives 1 S 1 S 1 1 1 1

BELT/FANNY PACK

Final Designs: General DesignVibrating Feedback MotorsModular DesignMagnetometer

Functional Decomposition

Benefits of Final DesignInconspicuous in NatureComfortable Placement for UserIntuitive to UserReliable DirectionalityConsistent FeedbackClient Approved (Interview with Potential

Customer)

Combination of ComponentsModular design with vibrationStationary placement for directional deviceHeat dissipation and locationReduced potential for damage

Final Design: KeypadPad Size: 2.0” x 1.5” x 0.1” Weight: 0.17oz Connector: 7 pins (Pitch 2.54mm)Maximum Circuit Rating:

35VDC, 100mA

 

Final Design: MagnetometerHMC6352 0.6” x 0.6”Simple, clean, degree resolution compass

heading with full integration of 2-Axis magnetic sensors and electronics

Cost: $34.95http://www.sparkfun.com/products/7915

HMC6343 0.8” x 0.8” 3-axis accelerometer with tilt compensation Cost: $149.95http://www.sparkfun.com/products/8656

Final Design: MagnetometerLSM303 Breakout Board 2.0cm × 2.0cm 3-axis accelerometer combined with a

3-axis magnetic sensor Cost: $29.95http://www.sparkfun.com/products/10703

**Micro-controller must be selected first, so it can be determined where or not the digital compass will be able to affectively interact.(MCU selected might already include a digital compass)

Final Design: Radio-Frequency IDentification SystemIncludes:A scanning antennaA transceiver with a decoder to interpret the

dataA transponder - the RFID tag

**Antenna puts out radio-frequency signals in a relatively short range. Providing the RFID tags with the energy to communicate with the reader.

Final Design: RFID AntennaLight weight (>1lb) and only 8.5 inches

squareSuperior performance8 dBi gain with broad coverageIt is suitable for both indoor and outdoor

wireless applications in the 900MHz ISM band, GSM, 900MHz cellular and RFID applications.

Final Design: RFID Reader

Criteria SkyetekModel M9 Module (MH)

Read Range 3.5mI/O Pins 4

Size (mm) 70x53x9Weight 12.5g

Frequency 862-955 MHZ

Supply voltage 4.5-5.5V

Final Design: RFID TagsCriteria Alien Alien Alien Alien AlienModel "G" "Squiggle" "Squiglette" "Short" "2x2"Frequency 840-960MHz 840-960MHz 840-960MHz 840-960MHz 840-960MHzRead Ranges 20ft 20ft 20ft 20ft 20ftSize 3.8"x.9" 3.73"x.319" 2.76"x.37" 2.76"x.67" 1.73"x1.81"factory programmed UID code yes yes yes yes yes# of bits in UID 64 64 64 64 64