LockInsidePipe

Category:Sasecurity
=== Lock inside pipe ===
Place a solid steel rod inside pipe posts on an entrance. A normal padlock is used to lock the rod inside the pipe.
Thus the lock can't be broken with a bolt-cutter since there is no leverage available. 
=== Angle grinder cutting detection ===
A vibration sensor will detect any attempt at cutting through the rod with an angle grinder. An ultra-violet sensor will
detect a cutting torch. 
=== Make steel rod part of electronic loop ===
Would need time domain reflectometer.
=== PIR inside steel pipe ===
To unlock the rod you must place your hand inside the steel post ancored on one side of the entrance. A PIR/Ultrasonic distance 
measurement circuit will detect this. 
=== Keypad deactivation ===
For added security and to prevent the unlocking of the rod under duress, place a keypad besides the post. A correct code must be entered or the Ultrasonic/PIR combination will send an alert to the base via a GpsGprs, MeshNetworking, RS485 or RadioModems combination.