The Smart/Safe Car SeatSENIOR 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 ChartPressure 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

Name Description

Temperature Device must be able to detect temperatures between 0oF and 120oF.

Pressure Sensor Device must be able to detect a weight of at least 5lbs. [2]

LED and Alarm Device’s LED and alarm alerts must be distinguishable from other alerts.

Battery Life Device 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

Type Name Description

Sustainability Durability

The 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 Safety

Safety This 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

  Range Area Price

Flexforce Pressure Sensor 0lbs - 25lbs 1"x1" $24.95

Force Sensitive Resistor 0lbs - 22lbs 1.75"x1.5" $7.95

Snap Action Push Button 0lbs - 18lbs 0.453"x0.453" $5.99

Pressure Sensor

  Range Area Price

Flexforce Pressure Sensor 0lbs - 25lbs 1"x1" $24.95

Force Sensitive Resistor 0lbs - 22lbs 1.75"x1.5" $7.95

Snap Action Push Button 0lbs - 18lbs 0.453"x0.453" $5.99

Wireless Module

  Range App Compatible Price

Bluetooth HC-05 0m - 30m Yes $15.95

Bluetooth Mate Silver 0m - 30m Yes $39.95

Bluetooth Mate Gold 0m - 100m Yes $64.95

Zigbee 0m - 100m No $22.95

Wireless Module

  Range App Compatible Price

Bluetooth HC-05 0m - 30m Yes $15.95

Bluetooth Mate Silver 0m - 30m Yes $39.95

Bluetooth Mate Gold 0m - 100m Yes $64.95

Zigbee 0m - 100m No $22.95

Temperature Sensor

  Range (Celsius) Accuracy Price

LM60CIZ - Ambient Temperature Sensor

-40o to 125o +/- 2 Co $0.88

MLX 90614 - Infrared Thermometer -40o to 85o  +/- 0.5 Co $19.95

Temperature Sensor

  Range (Celsius) Accuracy Price

LM60CIZ - Ambient Temperature Sensor

-40o to 125o +/- 2 Co $0.88

MLX 90614 - Infrared Thermometer -40o to 85o  +/- 0.5 Co $19.95

Microcontroller

  I/O PinsBluetooth

Compatible Programming

LanguagePrice

Arduino Uno 14 Yes C 29.95

Arduino Lilypad 14 Yes C 21.95

PIC33  21 No C  Free

Microcontroller

  I/O PinsBluetooth

Compatible Programming

LanguagePrice

Arduino Uno 14 Yes C 29.95

Arduino Lilypad 14 Yes C 21.95

PIC33  21 No C Free 

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

Month Achievement

August Research

September Purchasing, coding

October Coding, testing breadboard, car integration, finish cell phone app

November Finish car integration and coding

December Have finished prototype

Testing BreadboardLED 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 2013. Ggweather.com. Available: http://www.ggweather.com/heat/

[2] (17 September 2013). Low Birthweight [Online]. www.lpch.org. Available: http://www.lpch.org/DiseaseHealthInfo/HealthLibrary/hrnewborn/lbw.html

The Smart/Safe Car SeatSENIOR DESIGN I

MIDTERM PRESENTATION