PROBLEM TO BE SOLVED: To detect the position of a portable terminal in a vehicle room with high accuracy without increasing the number of antennas.SOLUTION: Receiving antennas are arranged at two or more places in a vehicle room and an auxiliary antenna is arranged at a position in advance that is the blind spot for the receiving antennas. When a radio wave from a portable terminal is received by the auxiliary antenna, the position where the auxiliary antenna is arranged is determined as where the portable terminal exists. Conversely, when the radio wave from the portable terminal is not received by the auxiliary antenna, the existing position of the portable terminal is detected on the basis of the reception strength of the radio wave received by the plurality of receiving antennas. This way, it is possible to accurately detect the existing position of the portable terminal without increasing the number of receiving antennas 10 mounted in the vehicle room. Furthermore, as the auxiliary antenna only need to determine whether or not a radio wave from the portable terminal is received and does not have to determine reception strength, this antenna can be more easily mounted than for the receiving antennas.SELECTED DRAWING: Figure 1

    【課題】アンテナの数を増加させずに車室内での携帯端末の位置を精度良く検出する。【解決手段】車室内の複数箇所に受信アンテナを配置し、受信アンテナの死角となる位置には補助アンテナを配置しておく。そして、携帯端末からの電波が補助アンテナで受信された場合は、その補助アンテナが配置されている位置を、携帯端末の存在位置として決定する。これに対して、携帯端末からの電波が補助アンテナで受信されていない場合は、複数の受信アンテナで受信した電波の受信強度に基づいて、携帯端末の存在位置を検出する。こうすれば、車室内に搭載する受信アンテナ10の数を増やさなくても、携帯端末の存在位置を正確に検出することができる。また、補助アンテナは、携帯端末からの電波を受信したか否かを判断できれば良く、受信強度を検出する必要はないので、受信アンテナに比べて簡単に搭載することができる。【選択図】図1


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    Title :

    PORTABLE TERMINAL POSITION DETECTOR AND METHOD OF DETECTING PORTABLE TERMINAL POSITION


    Additional title:

    携帯端末位置検出装置、携帯端末位置検出方法


    Contributors:

    Publication date :

    2018-09-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01S RADIO DIRECTION-FINDING , Funkpeilung / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet / H01Q Antennen , ANTENNAS, i.e. RADIO AERIALS





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