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Design Review

Design Review. S13-44-GLCK 4/18/2013. Who We Are. Baker Alotaibi Mechanical Engineer. Travis Arnold Electrical Engineer. Richard Posada Computer Engineer. Devin Scarborough Mechanical Engineer. Fahad Alotaibi Electrical Engineer. Design Overview. Locking Mechanism

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Design Review

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  1. Design Review S13-44-GLCK 4/18/2013

  2. Who We Are Baker Alotaibi • Mechanical Engineer Travis Arnold • Electrical Engineer Richard Posada • Computer Engineer Devin Scarborough • Mechanical Engineer FahadAlotaibi • Electrical Engineer

  3. Design Overview • Locking Mechanism • Lock Case Material • Power Subsystem • Microcontroller Subsystem • Software Subsystem

  4. Locking Mechanism Rack and Pinion mechanism • Handles much travel depending on setup • Simple to manufacture • Key Failsafe and Mechanism Relation

  5. Locking Mechanism Key and Matching Lock Cylinder • Typical Key Pros and Cons • Barrel or Tube Key and Cylinder

  6. Locking Mechanism Solenoids • Ideal use for simple lock operation • Solenoid Force versus Plunger Extension

  7. Lock Case Material Stainless Steel: • Advantages: hard material does not corrode. • Disadvantages: High cost, hard to fabricate. • Brass: • Advantages: high-class look, corrosive resistance, easily machined, cheaper. • Disadvantages: Weak, easily damaged, non-weather resistant • Steel: • Advantages: Very strong, easy construction. • Disadvantages: heavy, corrosion, action of rust.

  8. Power Subsystem Power subsystem: • Batteries Will be used as a power source • Will supply power to the microcontroller • Microcontroller will provide power to the solenoid and the Bluetooth receiver • Microcontroller supports AAA batteries at 1.5v, and a coin battery “cr2032” 3v

  9. Microcontroller Subsystem Microcontroller subsystem • Rfduino will be the microcontroller used for this design • Is Arduino compatible and uses the same Arduino code • Has low power mode and can run for a long duration of time using only a 3V CR2032 coin battery • Built in wireless communication. i.e. Bluetooth 4.0. • Small in size and low cost • Easy to program with the USB shield Function • Obtains input from phone application • Uses the output mechanisms of the microcontroller to control the solenoids • Will need an N-Channel Mosfet (TIP 102 works fine) as a relay that will provide and switch the power for the 12 V solenoids

  10. Software Subsystem Phone Application • Coded in Eclipse • Java based application • Free Software Microcontroller Application • Coded using Arduino Software • Using Arduino based libraries • Free software

  11. References • N/a. Stepper Motors. 2011. February 2013 <http://www.omega.com/prodinfo/stepper_motors.html>. • Society of Robots. ACTUATORS - SOLENOIDS. 2013. February 2013 <http://www.societyofrobots.com/actuators_solenoids.shtml>. • Bob Simon. Plant Services. 2013. February 2013 <http://www.plantservices.com/articles/2010/02dcmotors.html?page=full>. • Open Source RF, Kickstarter, [online] 2013. http://www.kickstarter.com/projects/1608192864/rfduino-iphone-bluetooth-40-arduino-compatible-boa (accessed: 14 April 2013). • Mohammad Hamdar. IPhone and Android are Taking over. May 28,2012. February 2013 <http://infomagnet.wordpress.com/2012/05/28/iphone-and-android-are-taking-over/>. • David Cogen. Android Application Development 101: Getting Setup. January 2011. February 2013 <http://theunlockr.com/2011/01/03/android-application-development-101-getting-setup/>.

  12. Questions?

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