Wildlife Tracker: Subsystems Design Review
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Transcript of Wildlife Tracker: Subsystems Design Review
Wildlife Tracker: Subsystems Design
Review
MSD ITeam P14347
Progress Report Cellphone & Google Maps Integration has been researched & found
to be a viable User Module Circuitry Block Diagrams Established (w/ Pin Connections) Enclosure Model Completed Began Purchasing Test Parts
Arrows & Broadheads Linx Technologies
Initial Arrow Attachment Deviation Experiment ready for trial Refined Budget Faculty Review Consultations Completed
Dr. Amuso Dr. P. Venkataraman
Previous Questions: Burst vs. Continuous Transmission – Burst will utilized for the
application (10-15 min. bursts) FCC Safety Requirements – SAR (Specific Absorption Rate) 1.6 W/kg
Project Deliverables Durable re-attachable tracking device that connects onto an
arrow Handheld user device that monitors the location of the GPS
attachment ‘Second Chance’ retrieval feature (In case shot is not fatal) Intuitive, easy to understand User Manual
Functional DecompositionLocate
Wildlife/Game
Attach to Arrow
Access Arrow
Attach to Wildlife
Does not alter Shot
Detach from Arrow
Link to Animal
Remains attached during
Flight
Protect Functional Integrity
Safeguard Electronics
Indicate Location of Attachment
Device
Transmit Signal
Activate Transmitter
Receive Signal
Activate Receiver
Process and Interpret Signal
Arrow Attachment - Electronics GPS Receiver
Receive location coordinates from GPS satellites Power Consumption : 66mW (at 3.3V)
Microcontroller Takes data from GPS receiver and converts it to be compatible with
RF Transmitter Power Consumption : 5 mW (at 2.5V)
RF Transmitter Transmit GPS location from arrow attachment to handheld device Power Consumption : 9mW (at 3.0V)
Battery Provide power to Receiver, Transmitter, and Microcontroller Voltage : 3V
User Device - Electronics Receiver: Radio Frequency Size Constraints: Mobile (Easy to Handle) Power Constraints: Mild User Interface: Straightforward RF Receiver
Receives GPS data from arrow attachment Power Consumption : 15mW (at 3.0V)
GPS Receiver Receive location coordinates of user Power Consumption : 66mW (at 3.3V)
Small LCD Screen Displays map, user, and location of animal
Microcontroller Converts data from RF Receiver to LCD screen Power Consumption : 5 mW (at 2.5V)
Battery (4) AA [1.5V*4 = 6V Power Supply]
Transmission of Signal
RF Transmitter
Satellite
RF Receiver
Microcontroller
Arrow Attachment User Device
GPS Receiver
Microcontroller
LCD Screen
GPS Receiver
Transmission of Signal Must meet FCC Regulations Low frequency waves
Work better around obstacles (e.g. trees) Goal is to utilize AM frequency range (535-1705kHz)
Transmitter must be low weight, low power consumption Receiver has more flexibility
GPS Receiver LOCOSYS GPS MC-1612-2R module Input voltage: 3.3V Supply current: ~20mA -40 to 85 degree Celsius operation 12.2 x 16 mm
RF Transmitter/Receiver LR Series Small size Input voltage: 3.0V Supply current: ~3-15mA -40 to 85 degree Celsius operation Transmit/receive RF signals
4.3” TFT LCD Screen Thin-Film-Transistor Liquid-Crystal Display (TFT LCD) Input Voltage: 4.0V Supply Current: 25mA Operation Temperatures: -20 to 60°C
Power Consumption
Arrow Attachment Electronics
DevicePower Consumption
(mW)GPS Receiver 66
Microcontroller 5RF Transmitter 9
Total: 80
User Device Electronics
DevicePower Consumption
(mW)RF Receiver 15
Microcontroller 5 TFT LCD 100
Total: 120
𝑃=𝑉 ∗𝐼
ID Risk Item Effect CauseLikelihood
Severity
Importamce
Action to Minimize Risk Owner
1 Effect on flight of the arrowThe attachment could
cause an inaccurate shot
The aerodynamics of the arrow become
faulty3 3 9
Ensure the aerodynamics of the arrow are unaffected by the attachment Tim/Alex
2 Range of the DeviceLocation of the animal
unknown
The animal becomes out of range of the
device3 3 9 Wireless data transmission test Eric/Joe/Frank
3 Enough holding force for the attachment to the arrow
Tracker doesn’t stay on arrow during flight or
impact
Not enough holding force to the arrow
3 3 9Test by applying a pulling force to the
attachment of the arrowTim/Alex
4 Unfamiliarity with wireless Transmitting/Receiving
Difficulties choosing the best method for signal
translation
Lack of RF/wireless transmission knowledge
3 3 9Seek help from an expert in the signals
field (ie. Dr. Amuso)Eric/Joe/Frank
5 Circuitry size constraintWeight and size of arrow
becomes too robust Unnecessary circuitry 3 3 9Keep the circuitry small enough to fit
into your palm Eric/Joe/Frank
6 Placement of mechanism onto arrow
Cause injury/ harm to the user or effect the accuracy
of the shot
Placing the device towards the butt of the
arrow3 3 9 Avoid placing the device towards the
back or mid section of the arrowTim/Alex
Risk Assessment A
Risk Assessment BID Risk Item Effect Cause
Likelihood
Severity
Importance
Action to Minimize Risk Owner
7 Lose of Signal Transmission Animal becomes lost
Heavily wooded areas or obstacles blocking the
signal of the attachment to the user device
2 3 6
Explore all frequencies for which the RF components can operate on, and select the frequency which provides the most minimal
interference
Eric/Joe/Frank
8 Animal falling on top of attachment
The signals from the attachment will be seriously if not completely attenuated
The body of the animal causes a median, for
which signals cannot pass through
2 3 6 Operate in a range of frequency, which signals can pass through the deer carcass Team P14347
9 Detachability of the device
If the device doesn’t detach the attachment
could block the penetration of the shot
Faulty detachment mechanism 2 2 4
Test the device on different material surfaces Tim/Alex
10 Part Lead Times Delays in the projection Procrastination 2 2 4 Ensure the parts are ordered ahead of schedule
Team P14347
11 Avoiding Patent Infringement Product can’t go to marketLack of attention to detail and patents
1 2 2Be aware and research all current
restraints by patentsTeam P14347
12 Durability of attachment (Reusability)
Device is fragile and requires replacing
periodically
Weak materials and poor construction of
device2 1 2
Ensure that weak, brittle materials are a last resort
Tim/Alex
13 Budget Conservation Going over budget Poor budgeting 1 1 1 Draft and follow a strict budget Team P14347
14 Geometry of the deviceAn alarming sound, alerting the animal Bulky geometry 1 1 1
Computation model of the aerodynamic drag of the attachment Tim/Alex
iPhone Application
Integration with Google MapsApplication Programming Interface (API)Web based application (Cellular Service is assumed by Saber)