PROBLEM TO BE SOLVED: To suppress power consumption of a passive entry system.SOLUTION: A request signal is transmitted using a prescribed antenna, among multiple antennas mounted on a vehicle, and a response signal replied from a portable device received thus detecting existence of the portable device. When existence of the portable device is detected, a reply request signal for requesting a reply signal is transmitted for the portable device, and the reply signal is received using multiple antennas thus detecting the existence position of the portable device. Since it is simply required to detect the existence position of the portable device by using multiple antennas, after receiving a response signal from the portable device, power consumption of a passive entry system can be suppressed.SELECTED DRAWING: Figure 7

    【課題】パッシブエントリーシステムの電力消費を抑制する。【解決手段】車両に搭載された複数のアンテナの中から、所定のアンテナを用いて要求信号を送信し、携帯機から返信されてきた応答信号を受信することによって、携帯機の存在を検知する。そして、携帯機の存在が検知されたら、今度は、携帯機に対して返信信号を要求する返信要求信号を送信し、複数のアンテナを用いて返信信号を受信することによって、携帯機の存在位置を検出する。こうすれば、携帯機からの応答信号を受信してから、複数のアンテナを用いて携帯機の存在位置を検出すればよいので、パッシブエントリーシステムの電力消費を抑制することが可能となる。【選択図】図7


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    Title :

    PORTABLE DEVICE DETECTOR, PORTABLE DEVICE DETECTION METHOD


    Additional title:

    携帯機検出装置、携帯機検出方法


    Contributors:

    Publication date :

    2018-06-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H04B TRANSMISSION , Übertragung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / E05B LOCKS , Schlösser / H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze



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