PROBLEM TO BE SOLVED: To provide an onboard machine capable of accurately deciding whether external equipment exists in the outside or inside of a vehicle compartment even when the external equipment is adversely affected by radio waves leaking out from an antenna disposed in a vehicle.SOLUTION: Among plural antennas disposed in a vehicle, one antenna is disposed so that radio waves propagate in a wider range in one of the outside or inside of a vehicle compartment than in the other one. An onboard machine transmits plural signals, which have different intensities, by selectively changing the plural antennas, and receives a receiving signal intensity, which is detected when the transmitted signal is received by the external equipment, from the external equipment. The onboard machine discriminates the location of the external equipment on the basis of a first receiving signal intensity and second receiving signal intensity. The first receiving signal intensity is a receiving signal intensity detected when the one antenna transmits a signal of a larger intensity than the other antennas do. The second receiving signal intensity is a receiving signal intensity detected when the other antennas transmit signals of larger intensities than the one antenna does.

    【課題】外部機器が車両に設けられたアンテナから漏洩した電波の影響を受ける場合であっても、当該外部機器が車室外に所在するか又は車室内に所在するかを確実に判定することができる車載機を提供する。【解決手段】車両に設けられた複数のアンテナの内、一のアンテナは、車室外側及び車室内側の一方が他方よりも広範囲に電波が伝搬するように設けられている。車載機は、複数のアンテナを選択的に切替えて強度が異なる複数の信号を送信し、送信した信号を外部機器が受信したときの受信信号強度を該外部機器から受信する。車載機は、第1の受信信号強度と第2の受信信号強度とに基づいて、外部機器の所在位置を判定する。第1の受信信号強度は、一のアンテナが他のアンテナよりも強度が大きい信号を送信したときの受信信号強度であり、第2の受信信号強度は、他のアンテナが一のアンテナよりも強度が大きい信号を送信したときの受信信号強度である。【選択図】図13


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    Title :

    ONBOARD MACHINE AND VEHICULAR COMMUNICATION SYSTEM


    Additional title:

    車載機及び車両用通信システム


    Contributors:

    Publication date :

    2016-01-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / E05B LOCKS , Schlösser



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