Position management system and position management program

A computer readable storage medium storing a position management program for a position management system, the position management system comprising:

• two or more types of detection tags provided to objects whose positions are to be detected, the type of detection tag being selectively provided in accordance with particular characteristics of each of the objects;
• and detectors provided corresponding to the detection tags;
• wherein two or more types of the detectors are alternately arranged in grids with predetermined spaces in a ceiling of a detection space;
• wherein the detection tags complement detection abilities with each other, and wherein when a detector receives a signal from a detection tag provided to an object, the detector generates detection result data including a unique tag ID which is assigned to the detection tag and a device ID which is assigned to the detector, the computer readable storage medium storing the position management program for causing a computer to implement a method comprising:
• processing the detection result data acquired from the detector and arrangement data of the detector;
• specifying a position of the object;
• and managing positions of the objects in a detection space.