Smartphone-Integrated Gunlock (Team 1444)Sponsor: CJD & Assoc. Mentor: Gary Redford

Ariel Austin, Aaron Clark, Christopher Downs, Edward Enhelder, Aaron Grabowska, Simon Noudelman

Objectives Casing Design & Subsystems Smartphone App

•  Recent rise in public and school has created a need for more secure gun safety measures

•  Currently available gunlocks currently utilize outdated physical locking protocols that are easy to bypass

•  Our product utilizes currently available technology to enhance security measures for the unlocking process as well as remote device monitoring

•  Product is an effective tool in firearm-owning households with mentally unstable children because the gunlock acts as an early warning device when gun is moved

•  Effective alternative to similarly positioned competitors

Requirements

Market Analysis

•  Displacement notification sent within 5 minutes•  Displacement notification sent when device moves 6 in.

•  GPS accuracy within 50 ft.•  Lost communication notification sent within 5 minutes

•  Unlocking protocol must be complete within 60 seconds

•  Battery life must be maintained for 7 days•  Battery must be rechargeable

•  Low battery notification must be sent at 20% capacity•  Operates at extreme temps (0-120 °F) for 12 hours

•  Operates at extreme humidity (90%) for 3 days

Two currently available competitors:

•  Smart Guns

•  First-party biometric sensors or RFID built-in for user identification

•  Seen as an intrusive technology•  Has not experienced market traction

•  The Gunbox

•  Small, safe-like device with cost that scales with features chosen ($300-$500)

•  Cannot house rifles or shotguns•  $75 yearly fee for GPS monitoring

Modeling

Commercialization

•  Unlocking utilizes the iPhone’s Touch ID sensor for biometric unlocking services via a Bluetooth connection

•  Uses push notification service to display relevant notifications on the users phone

•  Web service is used to store GPS values, which can be called for by the user for overlay on the map feature

•  Finite element analysis was performed on weak points that were identified in the case design

•  Weak points subjected to extreme loads of around 150 lbs. to ensure case security

•  Cost Management•  Cost is comparable to available products•  Price of electronics will decrease over time•  Designing a custom PCB will reduce unit

cost of circuit and eliminate shipping costs from individual parts

•  Miniaturization•  Process of miniaturization has been

started between first two prototype designs•  To build a product that could be

commercialized, the size of the casing must be comparable to currently available gun locks

Arduino Bluno

The device uses an Arduino microcontroller with Bluetoothcapabilities in order to communicate with the smartphone app and supply the necessary electrical signals to different components within our wired circuit

Solenoid Lock

The locking functionality is performed using a 5V push/pull solenoid that receives an unlock signal after your identity has been verified and allows the loose end of the cable mechanism to be removed

Cellular GSM

In order to communicate with the user’s smartphone app, a 2G cellular GSM is used that will provide means to relay relevant information to the smartphone when necessary

GPS Receiver

A GPS receiver is necessary to determine the location of the device when the user pings the gunlock in order to recover the coordinates and overlay them on a map

Accelerometer

A three-axis accelerometer allows the device to constantly monitor displacement and relays unwanted movements to the other subsystems to provide notifications when the firearm is moved

iOS Device

All of the subsystems communicate with the any iOS device that includes biometric

security features in order to perform all of the desired user-

end operations

•  Solidworks was used to model the mechanical designs

•  Once the electrical components were selected, they were modeled in Solidworks and the case was built around them