SEPARATION SYSTEMS, PIGGYBACKING DETECTION DEVICES, AND RELATED COMPUTER PROGRAM PRODUCTS FOR CONTROLLING ACCESS TO A RESTRICTED AREA AND RELATED METHODS

Separation systems, anti-piggybacking devices, computer program products and related methods for controlling access to a restricted area are provided. For example, a method for allowing single authorized entrance through a passage to control entrance into a restricted area of a facility can include, upon receiving an access granted signal, unlocking a lockable turnstile for an entry time period to permit the user to rotate a rotary panel assembly of the turnstile to enter the restricted area. The method can also include sensing, using a piggybacking detection device, a number of users in a count area within the turnstile while the turnstile is unlocked. Further, the method can include resetting the piggybacking detection device and locking the turnstile after only the single user is detected in the counter area and the rotary panel assembly of the turnstile is rotated to a position in the turnstile in which the single user is allowed to enter the restricted area.