I am currently working on a project and would appreciate your help. So i have this fence (eg. 3m x 3m) on which my 3 axis accelerometer is mounted in the geometrical center. It can detect whether someone is trying to climb upon it, or if someone's hitting or trying to break it using brute force. The deal is, suppose a person tries to cut the fence at the bottom left corner. Assuming that this will produce much smaller vibrations, how could one detect whether someone has cut the fence or not, using the accelerometer or any other sensor ?
closed as off-topic by Chris Stratton, Voltage Spike, Bimpelrekkie, Finbarr, alex.forencich Jun 6 '18 at 7:08
- This question does not appear to be about electronics design within the scope defined in the help center.
how could one detect, whether someone has cut the fence or not, using the accelerometer or any other sensor or electronic device.
If you threaded a "sense" wire that snaked left to right and from top to bottom and made that wire look like part of the fence, it's likely that someone cutting the fence will also cut the sense wire and this can be detected by a circuit quite easily.
The general idea is embodied in this type of product but it's quite easy to make your own: -
This is quite a broad subject. The 'Any electronic device' can be anything from a simple mechanical vibration sensor to an optical fiber replacing the fence's thread.
Obviously, there is cost involved and tons of other requirements which we don't know.
Look at some of the security fence vendors such as Magal security systems for more information.