1) A group of students from Panchayat Union Middle School in Tamilnadu designed a low-cost device to alert drivers and prevent accidents caused by drowsy driving. 2) The device uses two scientific principles - that salt water conducts electricity and that liquid pressure is equal at equal depths - to detect when a driver's head bends due to drowsiness and sound an alarm. 3) The students modified their initial device design to fit inside a safety helmet, allowing it to directly alert the driver through sound if their head nods due to sleepiness while driving.

1. Design for change -
2014
My Book… Two Principles … One Life saving
Device…
Presented by…
S.Sabarinathan, P.Sheik Abdulla, A.Justin, G.Priya,
R.Soundharya
Panchayat Union Middle School
Thenkuvalaveli
Valangaiman- Taluk
Tiruvarur District- 612801
Tamilnadu
India

2. Feel…….(Accidents)

3. Feel…….
They got information about accidents and its consequences from daily
newspapers.

4. Feel…….
Accidents………… One word, Which can change the life of one
individual or society suddenly from normal to tragedy. In Tamilnadu, last year
around 66,238 accidents were happened. Among them, 63,238 accidents were
happened due to the fault of driver (See Table). These faults may include like
drunk and drive, sleeping of driver while driving., etc
We want to reduce the accidents due to the sleeping of the drivers.

5. Imagine….
.
They want to reduce the accidents due to the sleeping of driver,
So they imagine to construct a low cost sleeping alert system for drivers.

6. Imagine…
Observation…..
Whenever a person starts to sleep, definitely his head
lost its balance and starts to bend.
Front
bend
Back
bend
Right
bend
Left
bend

7. Do…..
To find the Principle for the construction of
device……
They find concepts from their book to construct the device.
They find two principles from their 8th std science book.
1.The salt water conduct the electricity.
2.The pressure of the liquid is equal for equal depth(i.e height).

8. Do…..
On the basis of these principles, they are constructing their own device,

9. Do…..

10. Do…..
Final version of the device:
This is the final form the device. In horizontal position only, it will not
make any sound. While the vehicle driver starts to sleep , his head will
definitely bend . Then the device will make the sound. This sound will alert
the driver and it will avoid the accidents.

11. Modified Version of the device
We modified our device by fitting this inside the engineer’s safety helmet.

12. Modified Version of the device
Upper part of the helmet Device fitted part in helmet

13. A.Justin is wearing the device……

14. Uses of the device
For interrupted driving
For interrupted watching
For interrupted
studying
For interrupted
working
By avoiding the sleep, we can do the above work without any interruption…

15. Share…….
We displayed our device in a science exhibition held
in Mannargudi of Tiruvarur District,Tamilnadu.
Thank You…..