System for controlling and determining location and security model

A control and detection system for control of one or more objects connected the system, and for detection of location of the object in case the object disappears comprising a communication system for communicating from each object to at least to one data receiving device, and from said receiving device via data transmission to a control unit and further comprising an active short range transmitter that can be activated for functioning with a unique code and being placed in said object in the control area, said system comprising:

• a safety module, as a listening radio, monitoring at a distance of short range (10–100 m) the presence of the transmitter placed in said object in the area and/or detecting said object arriving to the area,
• wherein the safety module of each local cell, formed of the safety module, base station and objects connected to the base station is arranged to detect the arrival of any other active transmitter in the short range in order to identify the other active transmitter and forward respective data to the control unit,
• communication between said safety module radio and the control unit either directly or via a base station and a program in said safety module which steers the communication in a safety use, and
• in control situation to detect a distance between the safety module and the object which is smaller than the range of communication between said safety module and said object.