|
PRIMARY OBJECTIVES
1) Detect accident
2) Automatically roll down the window
3) Automatically unbuckle the seat belt
4) Automatically open the door (under specific conditions)
SECONDARY OBJECTIVES
During such accidents, automatically call the rescue team, ambulance and the police. A GSM module which is a part of PSS can serve this function.
Due to the current in the river position of the vehicle may be unknown. RF beacon can be used to detect the vehicle.
|
|
TECHNICAL DETAILS
The system has sensors to detect that the vehicle has hit some water body. Sensors can be conductivity sensor or pressure sensor. Water has very low conductivity. So amplifiers should be used to amplify the output signal. This signal is fed to the controller. According to the algorithm the controller takes the decision. When the system hits the pond, first action should be rolling down of the window. This action should be completed before the battery of the car is down. The output of the controller should be given to a driving unit which drives the motor of the power window.After this the seat belt should be unbuckled automatically. A motor can be used here to unbuckle the seat belt. Signal to this motor will be send by the controller. A driver unit is necessary to actuate the motor.
Now the person can get out through the window. If he is not able to get out through the window he can pull the emergency switch of the PSS to open the door. Even if he does not pull the switch, the door will be opened automatically after few seconds, say 30 sec for example.
An option to delay the opening of the door is optional, in case there are more people in the vehicle and they all are able to get out through the window taking time. Opening of door increases sinking speed. Even if they pull the switch to delay the opening of the door, the door will be opened automatically when the water level reaches the window level.
If the vehicle falls upside down, the door will be opened after a delay of say 10 second. It gives time for the passenger to prepare what to do after opening the door.
|
|
At the same time when the vehicle hits the pond, the GSM module and the RF Beacon will be activated. The GSM module will be calling to the emergency rescue, ambulance and the police.
PSS should be made water proof in order to achieve the objective. When the vehicle sinks in the pond the battery will be short-circuited which result in power failure. Hence PSS should have a backup battery. The charging wires from the alternator should be connected to the battery using diodes which prevents it from short-circuiting. PSS system with the backup battery should be water proofed.
|
