1. The Aquatic Safety Assistant
Final Presentation
Group 2
The Aquatic Safety Assistant
Design and Communications 2
Dylan Bastin-DeCoste, Brayden Poirier, Ross Bagnell, Robyn van Zutphen

2. Background Information
90% of children aged 1-4 years who drowned were not intended to be in the water, (Red Cross Canada, 2013).
Drowning is the second leading cause of preventable death for children under the age of 10 years, (Red Cross Canada, 2014).

3. Goal
To design and prototype a device that would alert a guardian when his or her child had entered the water.
To present the differences of the configurations and costs between the prototype and the potential market product.

4. DESIGN PROCESS

5. Water sensing design process
Alarm
Water sensor
Options considered
Alarm
Signal received by parent unit
Data is analyzed

6. Alarm Requirements Alarm Designed Sufficient volume
A pitch different from other household alerts
Continuous sound emitted
Alarm Designed
Tri tone
3.15 kHz
2-5 kHz is in the range that is known to be particularly irritating to the human ear.

7. Circular hard plastic case
Enclosure Design
Soft plastic case
Enclosure
Waterproof
Trapezoidal
Circular hard plastic case

8. System Configuration
Two part system
Transmitting and receiving units

9. Wristband Enclosure Components
Missing from pictorial:
Various resistors
Wiring

10. Hub Components Mini-Breadboard 9 Volt Battery Arduino Speaker
Xbee Module
Missing from pictorial:
Various resistors
Wiring

11. Wireless Transmission
Xbee-Wireless radio module
Used to communicate between the armband and the hub
Xbee modules support multiple wireless protocols and radio frequencies.

12. Water sensor

13. Arduino Code }} void loop() { if(Serial.available() >= 14) {
if(Serial.read() == 0x7E) {
for(int i=1; i<11; i++)
byte discard = Serial.read();
analogMSB = Serial.read();
analogLSB = Serial.read();
analogReading = 3.3*(((double)(analogLSB+analogMSB*256))/((double)1024));
Serial.print(analogReading);
Serial.print("\n");
if(analogReading<=0.10) //discard glitches{
analogReading=oldReading;
Serial.print("discarded reading\n");}
if(analogReading<=3.25){
beep(9,3150,50,8);}
oldReading=analogReading;
}}}
int analogMSB;
int analogLSB;
double analogReading;
double oldReading;
boolean submerged=0;
void setup() {
Serial.begin(9600); }
void beep(int pin, int freq, int ms, int notes){
for(int i=0;i<notes;i++){
if(i%3==0)
freq=freq* ;
else
freq=freq* ;
tone(pin, freq);
delay(ms);
noTone(pin);

14. Armband Design Leg Head Placement on body Arm Wrist Armband
Material
Compression Sleeve
Silicone rubber
Velcro Strap

15. Hub Design Portable Speaker Belt Clip Pager Hub
Text sent to your phone

16. Financial Analysis Item Number Purchased Price Per Unit Total Price
Arduino Uno-R3 1
$33.45
LilyPad XBee
$20.05
Coin Cell Battery 6
$2.60
$15.60
Breadboard-Mini modular (white)
$5.30
XBee 1mW Trace Antenna 2
$66.90
Velstrap Velcro Strap
$7.99
9 Volt Battery 4
$1.49
$5.96
3D Print of Hub
$6.00
3D Print of Enclosure
$5.00
$166.25

17. Project Schedule

18. Consultants and resources
Dr. Frank Comeau
Craig Seaboyer
Petit de Grat 3D printer technician
5th Edition Electronic Devices (Floyd)

19. Recommendations Add a power switch at the hub
Replace velcro strap with 3D printed silicon plastic strap
Improve child safety of product
Add rechargeable batteries
Reduce size of both enclosures

20. Questions?

21. Thank you