1. SOS TRANSMISSION

2. Through Cellular phones to save Accident Victims
SOS TRANSMISSION
Through Cellular phones to save Accident Victims

3. CONTENTS: INTRODUCTION RADIO DETECTION FINDERS THE TOY CAR EXPERIMENT
IDENTIFYING THE POSITION OF THE VICTIM
BLOCK DIAGRAM
SIMULATION
ADVANTAGES AND DISADVANTAGES
CONCLUSION

4. WHAT IS SOS TRANSMISSION?
Abstract view of the software robot required to perform the Save Our Souls (SOS) message routing task.
It uses a special hierarchical message dispatch system wherein people nearby and more likely to help are contacted .
The solution offered is the Force-Transducer method

5. TRANSMISSION OF SOS
Cellular phones are turning out to be a menace on the road. This is a major problem for the cellular phone manufacturers
The cell phone is fitted with a transducer, which detects shocks.
Based on the first condition, if the shock level is made very high, then an accident might not be identified at all.

6. Antenna used in RDF to identify the position of the victim
.One requires a residental software robot to trasmit SOS signal in intelligent manner
The solution needs a Positioning System to transmit the victim’s whereabouts to others
SOS signal has to be transmitted as soon as possible

7. RDF(Radio direction finders)
To the technique to find the victim’s position is RDF(Radio direction finders)
The Global Positioning System (GPS) is found to be costly. So, an unorthodox design using Radio Direction Finders (RDF) and beacon signals is described
The Goniometer or Crossed Loop Antenna is used for this purpose. This reduces cost effectively when compared with the GPS system.

8. R.D.F TRANSMISSION ANTENNA

9. The Toy Car Experiment:
In order to sense accident and to transmit SOS a TRANSDUCER is used to measure the jerk of an accident
This system needs statistical data acquisition to find out the exact threshold level of the force in an accident.
So in order to find the threshold frequency of an accident and to transmit SOS signal the following exeperiment is conducted.

10. EXPERIMENT TO VERIFY THE WORKING OF THE SYSTEM
2.1
EXPERIMENT TO VERIFY THE WORKING OF THE SYSTEM
Samp,
Measured Voltage
( mV )
Actual Force
( ) 1.
113.2
.977 2.
112.7
.972 3.
114.3
.985 4.
114.5
.987 5.
113.3
.978
Mean
113.6
.980

11. ACIDENTS CAUSED BY THE UNCONSINCOUS OF VICTIM

12. 3. Identifying the Position of the Victim:
This technique uses three satellites and pin points the location by the triangulation process,
wherein the user’s position is located as the point of intersection of the three circles corresponding to the satellites.
The better option would be to wait for a SOS signal and then identify the victim’s position

13. HOW GPS WORKS ..……? ?
The system suggested by this paper makes use of a beacon or search signal transmitted by the base station
This search signal is sent only if an SOS is identified. So, when a victim sends out his SOS, the base station immediately sends the search signal.
This is easily achieved by constructing a mismatched termination in the cellular phone for that frequency

14. Cellular phone used in SOS transmission
The Radio Direction Finder (RDF) antenna system. This makes use of a highly directional loop antenna to identify the signal source which in this case is the cellular phone
The base station is then fitted with the CROSSED LOOP or BELLINI TOSI or GONIOMETER type of direction finder
The user sends out a microwave signal to the base station which sends its beacon signal.

15. Transducer fitted in Cellular Phone Switch to Trigger SMS Subroutine
Complete Block diagram of the System:
Force Caused By Accident
Help Message
User ID & Password
Position Finding Signals
To Base Station
Transducer fitted in Cellular Phone
High Pass Filter
Switch to Trigger SMS Subroutine
Base Station’s Goniometer and Positioning Equipment
Software Robot
Beacon Signal
To Various Users

16. Simulation: Microphone MW Transmitter MW Receiver
Analog to Digital Converter
Serial Port of Personal Computer
C program to measure input and set flag
Java Front- End
Oracle Mock Database

17. ADVANTAGES:----
This system gives detailed surveying to decode the position of the user in polar coordinates to actual localities
priority can be allocated to users based on the force measured
False alarms are bound to occur in such a system. This can be reduced by ringing the cellular phone every time an SOS is sent and thereby warning the user

18. APPROXIMATE COST ANALYSIS OF SYSTEM
Cost of installing Goniometer for one base station: RS.20000
Number of Base Stations in Chennai City : RS.50
Cost of installing Goniometer for the City : RS
Cost per Subscriber : RS 110
Cost of Transducer fitted in the Cell Phone :RS 1000
Cost of other hardware in the Cell Phone :RS 1000
Total Cost Per Subscriber : Rs. 2,110

19. DISADVANTAGES:----
. This is the system requires the user to place the cellular phone in a stand or connect the transducer to the vehicle in case of four wheelers.
Though this might seem as if taking choice from the user, the fact that the system deals with a question of life or death is more important
The system does not handle multiple victims simultaneously

20. CONCLUSION:
Thus, if implemented this system would prove to be a boon to all the people out there driving with hands-free earphone in their ears

21. REFERENCES:
Helfrick and Cooper, Electronics Measurements and Instrumentation .
Raj Pandya, Personal Mobile Communication Systems and Services .
K.D.Prasad, Antennas and Wave Propagation

22. Thank you

23. Any queries ..?????