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Accelerometer Automated Locking system

Former Member

Hello,

 

I am Yuvish Chintaram from Mauritius Island.

 

Recently, I have applied to a university and my acceptance would be considered on a project that would help to contribute to my society.

My other friends are planting mangroves to help protect the marine ecosystem but I am more interested in science  and think to have find an interesting project.

 

A few months ago, an accident occured to a student that fell from a moving bus.(I have send you the link below.)

Surprisingly, two more people fell from a moving bus from the back emergency door after the earlier incident.

A solution was found by the Government that all bus should have an alarm and  that when the door opens an alarm will ring. But this does not solve the problem!

 

Hence, my idea was to incorporate a locking system that is fully autonomous. The system should lock the door while the bus is moving but unlock itself when the bus stops at a bustop.

I was thinking of using an accelerometer that will detect the acceleration of the bus that will relay to a circuit such that at a minimum value the latter will send a signal that will automatically lock or unlock the system.

eg. If(X>200)

      eletric lock is lock  

      else if (X<200)
       electric.lock is unlock

 

I am here to ask you if you could give me some advice and also if my current solution will work.

I would also be pleased to know your ideas about my project.( How would you answer it, etc..)

I would really appreciate if you could reply me as soon as possible.

 

http://news.islandcrisis.net/2015/03/17-year-old-student-keshnee-purmasing-died-after-falling-from-school-bus/

 

Regards

Yuvish Chintaram

Parents

  • Given that once the bus is at desired speed, the acceleration will effectively be zero, the same as if it where not moving so this would not be an ideal sensor to use

     

    A GPS measuring speed in any direction could be used as an alternative though.

     

    Your project is a worthy one but you need a different sensor

    Many new cars have a sensor that locks the doors once the car is over a set speed. This may give you somewhere to look.

     

    You could also tie into the but electronics (CAN BUS) and read it's speed

     

    Good luck

    peter

Reply

  • Given that once the bus is at desired speed, the acceleration will effectively be zero, the same as if it where not moving so this would not be an ideal sensor to use

     

    A GPS measuring speed in any direction could be used as an alternative though.

     

    Your project is a worthy one but you need a different sensor

    Many new cars have a sensor that locks the doors once the car is over a set speed. This may give you somewhere to look.

     

    You could also tie into the but electronics (CAN BUS) and read it's speed

     

    Good luck

    peter

Children
  • in reply to Robert Peter Oakes

    By far the best bet is use CAN bus info ot detect if the bus is moving, but only if the bus has CAN.

     

    If you are thinking of retrofitting to old vehicles you will need some other kind of sensor.

     

    One of the problems with adding safety systems to existing technology is that people apply very high standards to the new system. So you will need to ensure that your lock is very reliable - because people will count on it working and lean on the doors. You must also ensure that the doors unlock if the bus stops , or crashes etc so that people are never trapped inside it.

     

    I doubt that a one person project can do more than demonstrate feasibility of the idea and perhaps make a model.

     

    It is  a good idea - many cars already have such a system - are you sure that it is not available on new buses.

     

    MK

  • in reply to Robert Peter Oakes

    Oh yes I have not thought of this. Constant speed means 0 acceleration.


    But since I will attach the accelerometer to the bus, i will also have to take into consideration the vibration of the bus.

    And I think The vibration when it will move and when it is steady are different?

    What do you think?
    Unfortunately the bus do not have CAN.
    And not all bus here have this locking system. I will try with the accelerometer first then i will see.
    Can you give me some advice with the sketch?
    I will have to use a relay to operate the electric lock.

     

    Regards

  • in reply to michaelkellett

    Hello

    I am really pleased for your advice.

     

    Unfortunately, the bus do not have CAN.

    But i really wanted to try it with the accelerometer.

    Then i will see it it works or not, and i can learn from that.

     

    Do you have an idea how the sketch will be? I am not so good in sketch image

    I can also include an override switch to the driver just in case and use a relay to operate the electric lock.

    Regards