Drowning Sensor and Automatic Emergency Door Opening Safety System

1. DROWNING SENSOR AND
AUTOMATIC EMERGENCY
DOOR OPENING SAFETY
SYSTEM
Presented by…
Badal Biswas (U10AM005)
Deepak Panthi
(U10AM007)

2. ABSTRACT
Any car accident is frightening, but an accident in which your
vehicle is thrown into the water with you trapped inside is absolutely
terrifying.
Although fencings are built around a road nearby a waterbody
to prevent such accidents, but accidents are imminent. And no in-car
safety system have been invented to prevent such mishaps.
A vehicle equipped with Drowning sensor and automatic
emergency door opening safety system under a drowning situation,
senses the water level rising above the windows and it automatically
activates a controlled opening system which detonates the door hinges
that loosens the door for the occupant to escape the vehicle on time.

3. INTRODUCTION

It is an electronically operated automatic safety system.

Drowning Sensor and Automatic Emergency Door
Opening Safety System consists of a water level sensor, a
pressure sensor and a controlled opening system.

When a vehicle is submerged under water, different forces
acts on the vehicle body creating high pressure from all
the sides.

4. 
Under such conditions it is very difficult to
open the vehicle’s doors or any of the other
emergency exits.

5. 
So, Drowning Sensor and Automatic
Emergency Door Opening Safety System helps
the occupants to escape on time.

7. DROWNING STATISTICS

Annually, 10% of drowning deaths is associated with
submerging of vehicles.

Based on the Fatal Analysis Reporting System(FARS)
case study, there are 247 vehicle submersion events
annually.

Amongst this 247 vehicle submersion cases where 412
occupants were involved, 299 occupants are reported
dead.

8. METHODOLOGY
Firstly we need to calculate the pressure
under water…
We need to define the depth for which
we need to set a fixed value for the pressure
sensor.
There are two conditions:
1. When it is fresh water
2. When it is saline water

9. 1. When it is fresh water
Multiply the depth(in ft) by 0.432 lbs per
feet. The resulting pressure will be in
pounds per square inch(psi).
2. When it is saline water
Multiply the depth(in ft) by 0.445 lbs
per feet.
Where the value 0.432 and 0.455 lbs per
ft are the ambient pressure of fresh water
and saline water respectively.

10. Pressure Sensor
PS100-2BAR
Pressure Sensor

11. Pressure Sensor Specifications
Model PS100-2BAR
Max capacity 2 BAR ( 29 PSI )
Supply voltage DC 9V
Operating Temperature 0 C to 60 C
Output Full capacity output = 100 mV DC
Size 30 mm dia. x 85 mm.
Weight 160 g.
Cable length 1 meter
Wire 2 pins for 5V DC power supply.
Connection 2 pins for 100 mV DC output signal.

12. Water Level Sensor
An Electronic Water Level
Sensor

13. Water Level Sensor Specifications
Pressure range 0 - 25 Bar
Operating temperature -40 c to +85 c
Materials Stainless steel
Length range 100~ 2000 mm
Operating range 27 mm diameter

14. Opening System

An EXPLOSIVE BOLT is used as the opening
component in Drowning Sensor and Automatic
Emergency Door Opening Safety System.

It is a controlled opening system and
completely harmless.

It is coupled with pressure sensor and water level sensor.

15. Explosive Bolts

It is an explosive attachment device for mechanical
connections equipped internally with an explosive
charge.

This detonation is strong enough to rapture the vehicle
door hinges from the vehicle body.

This bolts have safety and timing of all secondary
explosives.

16. 
The minimum diameter is 0.5 inch having a
tensile strength of 21,000 lbs.

Bolts are fabricated from high strength alloy steel.
An Explosive Bolt

17. An exploded view of the Explosive Bolt

18. Implementation of Explosive Bolts
 Explosive bolts and door hinge pins have
similar dimensions.

Due to this similarity we can replace the usual
door hinge pins by explosive bolts.

19. A Door Hinge

20. Construction
Fig: Circuit Diagram of DSAEDDSS

22. Conclusion
We have seen that every car drowning accident
result in atleast one casualty, which accounts for a
100% fatality. As an automobile engineer it is our
responsibility to design such a safety system which
will ensure 0% fatality cause “every life counts”.
And also as only the pin of the hinge is fractured,
it can be replaced and used again at a very low cost

23. cause “every penny counts”.