POSITION DETECTING METHOD, POSITION DETECTING SYSTEM, AND POSITION DETECTING PROGRAM

PROBLEM TO BE SOLVED: To detect the positional relationship between opposite articles with high accuracy.SOLUTION: A tag reader 100 is composed of a memory portion 101 for storing positional information on each place on a surface of a predetermined article and an ID of a radio IC tag 41 installed at each place in association with each other; and a computing portion 104 for executing first processing which executes reading action to the radio IC tag 41 on the surface several times, and counts the number of identification of each radio IC tag 41 whose ID can be identified by the reading action, and second processing which reads out the positional information corresponding to each radio IC tag 41 from the memory portion 101, weights to the positional information by a value of the counted number of identification related to the ID, calculates a position of the tag reader 100 on the basis of each positional information after the weighting, and outputs the calculated positional information to an output portion 106. 【課題】対向する物体同士の位置関係を良好な精度で検出可能とする。【解決手段】タグリーダー１００を、所定物の面上における各箇所の位置情報と、各箇所に設置された無線ＩＣタグ４１のＩＤとを対応付けて格納した記憶部１０１と、面上の無線ＩＣタグ４１に対する読み取り動作を複数回実行し、当該読み取り動作によりＩＤを識別できた各無線ＩＣタグ４１の識別回数をカウントする第１処理と、各無線ＩＣタグ４１のＩＤに対応する位置情報を記憶部１０１より読み出し、当該位置情報に対して、該当ＩＤに関してカウントした識別回数の値で重み付けを行い、当該重み付け後の各位置情報に基づいてタグリーダー１００の位置を算定し、当該算定した位置情報を出力部１０６に出力する第２処理を実行する演算部１０４から構成する。【選択図】図１