Maple seed sensor housing for desert reconnaissance

1
Maple seed sensor housing for desert
reconnaissance

• Group 17
• Clinton Bencsik
• Mark Brosche
• Christopher Kulinka
• Christopher Redcay
• FAMU-FSU College of Engineering

2
Overview

• Introduction
• The Design Concept
• Experimental Calculations
• Prototype Design
• Bill of Materials Cost Analysis
• Conclusion
• Planned Future work

3

• Harris Corporation
• 5.3 billion revenue in 2008
• Fields
• Communications and Intelligence Programs
• Defense programs
• Communications and information processing
  products
• Data Links, Visualizations, and Digital Mapping
• Seeking a way to monitor battle field terrain
• Monitor foot travel
• Monitor vehicle presence

4
Project Scope
Design a sensor vehicle to house a battlefield
awareness network that can be dropped from any
altitude.
5
What is significant about a Maple seed?

• Wing on seed is a natural mechanism for
  dispersing seeds over a large area.
• Seeds float to the earth using auto-rotating
  flight
• Why a Maple seed?
• Simplifies design to avoid complex moving parts
• Produces a desirable spread pattern to monitor a
  large area

6
The Design Concept

• Single wing auto-rotating design
• Seed sensor housing (1)
• SDM manufactured
• Integrated sensors and controllers
• Integrated circuits
• Integrated transmitter and power source
• Wing with flexible solar cells (2)
• Provides power to battery and capacitor
• Curve and shape cause auto-rotation in flight
• Wing spine (3)
• Provides support for
• the light, thin wing

1
3
2
7
The Design Components

• Sensors
• Infrared Sensor
• Glolab DP-001
• Vibration sensor
• SQ-SEN-200 Omni-directional tilt
• and vibration sensor (a)
• Power
• Flexible Solar cells (b)
• Silicon Solar
• 4.5 x 1.5 (3V at 50 mA)
• Battery
• Sanyo 3V RLITH-5
• Capacitor (c)
• Panasonic 5.5V

a
b
d
c
8
The Design Concept Video
Dramatization. Objects not to scale.
9
Proposed Component Diagram

• Power collected from solar cell.
• Energy stored in DC battery.
• Simultaneously senses infrared signals and ground
  vibrations.
• Sensor outputs directed to microcontroller.
• Signal transmitted to central unit.

10
Application of the Lift Equation to Auto-Rotating
Wings
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Simplifying the Area

• Equation of area in terms of the total length of
  the maple seed.
• Constant wing shape in order to introduce a coef.
  that represents that common shape.
• Combining these two equations and substituting a
  known area, length and width

12
Obtaining the Final Equation

• We now combine the approximated lift equation
  with the simplified area to get lift as a
  function of length

Note CI lift coef. , ? air density , ?
angular velocity
13
Optimization

• Center of Gravity
• Inside head
• Maximizes use of entire wing length

14
Optimization

• Use rounded edges
• Initial prototypes failed due to stress
  concentrations

15
Prototype Design
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Prototype Design Detail

• Exploded View
• 1 - Wing
• 2 - Solar Panel
• 3 - IR Sensor (2)
• 4 - Vibration Sensor
• 5 - Micro Controller
• 6 - Spine
• 7 - Head

17
Fused Deposition Modeling Prototype
Overall Length 6.75, Seed Length 1.5, Wing
Width 1.75
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Final Bill of Materials Cost Analysis

• Total Cost per Seed 92.52

19
Future Plan
WE ARE HERE

• In the next two weeks before final presentation
• Final components decided upon
• Cost analysis completed
• Shape prototype will be completed and tested
• Design ready for construction

20
References

• http//www.signalquest.com/sq-sen-200.htm
• http//www.siliconsolar.com/flexible-solar-panels-
  3v-p-16159.html
• https//www.ccity.ie/site/index.php?optioncom_vir
  tuemartpageshop.browsecategory_id0keywordma
  nufacturer_id0Itemid3orderbyproduct_namelimi
  t20limitstart100vmcchk1Itemid3
• http//www.amazon.com/exec/obidos/ASIN/B000X27XDC/
  refnosim/coffeeresearch23436-20

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Acknowledgement

• Dr. Jonathan Clark - FAMU/FSU College of
  EngineeringDepartment of Mechanical Engineering
• Use of the STRIDE Lab
• Mr. Matt Christensen Harris Corporation