Students at the Duke University have created a prototype Wisdom Door that uses biometric information to decide who enters.
The door does not make you to stop and identify yourself, but it has nine different sensors that gather enough information about you to identify who you are.
At the top of the door is an ultrasonic sensor that beams a signal downward. The beam bounces off your head and this delivers your height to the system. Another four infrared sensors are mounted in the door jams that provide a measurement of girth. Finally there are four load sensors in the floor of the door that tell the system the weight of the person who passes through it.
The system looks good but it also has its own limitations that are like what if a lady passes the door wearing high heels or a person with a heavy coat.
Via: technovelgy
