Writting Proximity Circuit

Proximity Circuit

This circuit is employed in varied hangars in differents airlines numbers one worldwide; its purpose is to be able to determine the distance that is to arrive the airplane in depth the hangar. 

Well in the hangar of Voca 2 doesn´t have and we are looking for is to apply  this circuit to avoid accidents when the plane with the structure or a other thing, also a circuit connect to the proximity will be used to sound an alarm when being at 2 mts.