Hi Guys!
We've come up with a concept of detecting the illegal cutting of game fencing (a savere problem in terms of animal poaching and theft in South-Africa), and we could really use some help..
Background: Game fencing are 20 -30 strands of steel wire aproximately 2.5mm thick, under severe tension, stranded parralelle. Some game fences are up to 200km in distance.
Several "alarm" options have been tried with little sucess. Not going into the details of how we plan to convey the signal... we'll cover that, but we need a pulse trigered by sound.
See, when any of these steel wires are cut, they make a very destinktive "TWANG". It MUST be possible to have this "TWANG" recognised by a simple inexpensive device, filtering unimportant frequencies, and trigering a pulse. It should be possible to detect this "TWANG" over vast distances. (Think of the two cans conected by a tensioned string "telefone").
Please guys, any assistance is much appreciated.
We've come up with a concept of detecting the illegal cutting of game fencing (a savere problem in terms of animal poaching and theft in South-Africa), and we could really use some help..
Background: Game fencing are 20 -30 strands of steel wire aproximately 2.5mm thick, under severe tension, stranded parralelle. Some game fences are up to 200km in distance.
Several "alarm" options have been tried with little sucess. Not going into the details of how we plan to convey the signal... we'll cover that, but we need a pulse trigered by sound.
See, when any of these steel wires are cut, they make a very destinktive "TWANG". It MUST be possible to have this "TWANG" recognised by a simple inexpensive device, filtering unimportant frequencies, and trigering a pulse. It should be possible to detect this "TWANG" over vast distances. (Think of the two cans conected by a tensioned string "telefone").
Please guys, any assistance is much appreciated.