The Smart/Safe Car Seat SENIOR DESIGN I MIDTERM PRESENTATION

Andrew Evans (EE)Le’Quala Jackson (CPE) Sam Stockstill (EE)Kyle Willis (EE) Advisor: Dr. Raymond Winton Our Team

Outline  Problem  Solution  Flow Chart  Constraints  Technical  Practical  Approach  Timeline  Questions

Problem  Extreme temperatures are reached in minutes inside vehicles when turned off  Caregivers getting out of daily routine and/or in an extreme hurry  The available electronic technology is not being utilized

Solution  Device works without the caregiver having to do anything out of the ordinary  Multiple sensors and Bluetooth module  Multiple catch safes in case one system fails or goes unnoticed during use

Flow Chart Pressure Sensor Device Power On Vehicle Off LED Timer Starts Bluetooth Disconnected Locks Alarm Sounds Timer Times Out LED Flashes Alert Sent to Phone Dangerous Temperature Detected

Technical Constraints NameDescription TemperatureDevice must be able to detect temperatures between 0 o F and 120 o F. Pressure SensorDevice must be able to detect a weight of at least 5lbs. [2] LED and AlarmDevice’s LED and alarm alerts must be distinguishable from other alerts. Battery LifeDevice must have a minimum battery life of at least 100 hours. Communication Compatibility Device must be compatible with Android OS and able to communicate with the CAN bus. The device must also be able to connect to the caregiver’s cell phone through Bluetooth.

Practical Constraints TypeNameDescription SustainabilityDurabilityThe device must be able to withstand motion and vibration of the vehicle, coming in contact with moisture, and a vast range of temperatures. Health and SafetySafetyThis design aims to prevent deaths by helping reduce the problem of caregivers forgetting their children in vehicles unattended.

Sustainability The device must be able to work under many types of conditions:  Moisture  Vibrations and movement from vehicle  Extreme temperatures

Health and Safety Documented cases of children dying of heatstroke in United States directly related to being left in vehicles:  2013: 41 [1]  1998 – Present: 602 [1]

Approach Based on previous designs by University design teams from Vanderbilt (Kidsense Car Seat) and our MSU (Child Safer Seat) Also based on Graco SmartSeat All-in-One Car Seat

Pressure Sensor RangeAreaPrice Flexforce Pressure Sensor0lbs - 25lbs1"x1"$24.95 Force Sensitive Resistor0lbs - 22lbs1.75"x1.5"$7.95 Snap Action Push Button0lbs - 18lbs0.453"x0.453"$5.99

Pressure Sensor RangeAreaPrice Flexforce Pressure Sensor0lbs - 25lbs1"x1"$24.95 Force Sensitive Resistor0lbs - 22lbs1.75"x1.5"$7.95 Snap Action Push Button0lbs - 18lbs0.453"x0.453"$5.99

Wireless Module Range App Compatible Price Bluetooth HC-050m - 30mYes$15.95 Bluetooth Mate Silver0m - 30mYes$39.95 Bluetooth Mate Gold0m - 100mYes$64.95 Zigbee0m - 100mNo$22.95

Wireless Module Range App Compatible Price Bluetooth HC-050m - 30mYes$15.95 Bluetooth Mate Silver0m - 30mYes$39.95 Bluetooth Mate Gold0m - 100mYes$64.95 Zigbee0m - 100mNo$22.95

Temperature Sensor Range (Celsius)AccuracyPrice LM60CIZ - Ambient Temperature Sensor-40 o to 125 o +/- 2 C o $0.88 MLX Infrared Thermometer -40 o to 85 o +/- 0.5 C o $19.95

Temperature Sensor Range (Celsius)AccuracyPrice LM60CIZ - Ambient Temperature Sensor-40 o to 125 o +/- 2 C o $0.88 MLX Infrared Thermometer -40 o to 85 o +/- 0.5 C o $19.95

Microcontroller I/O Pins Bluetooth Compatible Programming Language Price Arduino Uno14YesC29.95 Arduino Lilypad14YesC21.95 PIC33 21NoC Free

Microcontroller I/O Pins Bluetooth Compatible Programming Language Price Arduino Uno14YesC29.95 Arduino Lilypad14YesC21.95 PIC33 21NoCFree

Timeline  Acquired Child Car Seat  Began coding for Pic33  Finished coding for thermal sensor with Arduino  Ordered and Received parts including new bluetooth module and new Arduino  Started testing breadboard with Pic33 MonthAchievement AugustResearch SeptemberPurchasing, coding OctoberCoding, testing breadboard, car integration, finish cell phone app NovemberFinish car integration and coding DecemberHave finished prototype

Testing Breadboard LED Representing Lock Alert LED Connected to Timer SW1: Baby Sensor SW2: Engine On/Off PB: Locks

Bluetooth Connectivity

Child Seat

References [1] J. Null. (10 July 2013). Heatstroke Deaths of Children in Vehicles [Online]. 1 October Ggweather.com. Available: [2] (17 September 2013). Low Birthweight [Online]. Available:

The Smart/Safe Car Seat SENIOR DESIGN I MIDTERM PRESENTATION