Accelerometer Automated Locking system

It's not more difficult to use a GPS sensor than the accelerometer. But need to know before what do you plan to acquire.

Yes i agree with you its more difficult.
so lets say we use a GPS, we will have to use it in a way as a speed sensor. right? correct me if i am wrong
i.e speed = movement
movement = lock electric lock

Just a little bit of research can get you some useful information.

http://forum.arduino.cc/index.php?topic=24337.0

Connecting the gps will depend on the module you opt for, but it can be as simple as:

Yuvish, in my opinion, this assumption is partial and is not sufficient.

By one side GPS will grant specific information on speed and position. Maybe also useful for path tracking, a simple log recording (e.g. a circular log reset every new bus tour to be checked is something appears etc.) Then the accelerometer - that it is NOT an accelerometer but an inclinometer as far as I have read, integrates the instant position and speed information (it's up to your project needs to decide the sampling frequency) to know the inclination respect ground, acceleration from stop, road conditions and so on. In this way it is possible - as I wrote above in a previous post - to define, maybe experimentally, a bus behaviour in some conditions. Then, these different situations can be preset as a series of standard ranges. This is what I think may give you all the information you need to lock and unlock the doors in a reliable and useful way.

So, considering that you have not great experience in electronics, I can suggest that - but depends on the budget too - a Raspberry PI with the microstack accelerometer and GPS board can solve your hardware problem very simply. About the software no problem, you can do it in many ways, including python (almost at high level) and there are lot of examples I can provide (or the other guys on this forum).

Take a look to the products I mentioned: http://www.element14.com/community/docs/DOC-70590/l/element14-launches-microstack-for-the-raspberry-pi and http://www.element14.com/community/community/raspberry-pi/raspberrypi2

Thanx Paul that was really useful

Thank you Enrico. I will look into that.
I am very at ease with arduino. Wont it take too much time now, to understand the pi all that?

Hi,

Why not just have a lock that can only be opened by the bus driver pressing a button (if he doesn't press it, no-one gets off), and the button only works when the handbrake (or equivalent in a bus - I have no idea) is applied? There may be a brake indicator light, that could be used as the enable function.

This then becomes a logic gate type of problem.

shabaz wrote:

 

Hi,

 

Why not just have a lock that can only be opened by the bus driver pressing a button (if he doesn't press it, no-one gets off), and the button only works when the handbrake (or equivalent in a bus - I have no idea) is applied? There may be a brake indicator light, that could be used as the enable function.

This then becomes a logic gate type of problem.

I would guess if the driver was incapacitated (or fled the scene), then an evacuation would be hindered.

I think it seems more complex but as it is more powerful, I think you have a wider range of possibilities to understand and make a well done project with - definitely - less difficulties.

That's true, but (been a long time since I was on a bus!) there are the 'smash glass' hammers or override buttons with thin glass in front of them.

Maybe that is not an option in some countries though due to vandalism/violence.