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)