I am a university student and I need some help in a project. For the past few years now, many accidents have occurred whereby in overcrowded buses, passengers are accidentally propelled from the back emergency door. Or, sometimes because the rear door is not properly closed.The driver are unaware when this incident occurs as he has no control on the rear door. And after a deep analysis, I found that accidents like these have occurred in US and in European countries as well. Hence, I wanted to find a solution which can be implemented in any buses which will prevent these type of accidents in the future.
An automated system which will prevent the rear door from opening while the bus is in motion and will automatically unlock when the bus is at rest.
Here are some links describing accidents that have occurred:
- Boy opens exit door on moving school bus, falls out
- Family calls for tighter safety rules after son, nine, falls out of 60mph coach and is only saved by a passing surgeon and nurse
Actually my problem is that I can't find a device which can tell me if the bus is in motion or not.
I did some initial tests with an accelerometer. But when the bus moves at constant speed, its acceleration is zero and hence the device assumes the bus has stopped.
I can use an RPM sensor but I need a solution which can be easily plugged-in in any buses. That is, the system can be implemented by anyone... something which can easily be mass produced.