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
Top Related