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PORTABLE MACHINE POSITION ESTIMATION SYSTEM AND ON-VEHICLE MACHINE
To provide a portable machine position estimation system that can accurately estimate the position of a portable machine even when it is outside of a vehicle.SOLUTION: A portable machine position estimation system performs the steps of: determining a key distance D, which is a distance between an on-vehicle antenna and an electronic key, with respect to three or more on-vehicle antennas, based on an RSSI of a radio wave received by the electronic key (S150); estimating a key position based on the key distance D (S160); when the key position is outside of a vehicle (S170: YES), determining newly a calibrated key distance Dc in the case that the RSSI, with reference to at least one of the three or more on-vehicle antennas, is a calibrated RSSI calibrated in consideration of a radio wave attenuation due to a metal portion of a vehicle body (S190); and estimating newly the key position using the calibrated key distance Dc (S200).SELECTED DRAWING: Figure 6
【課題】携帯機が車両の外にあっても精度よく携帯機の位置を推定できる携帯機位置推定システムを提供する。【解決手段】電子キーが受信した電波のＲＳＳＩに基づいて、車載アンテナから電子キーまでの距離であるキー距離Ｄを、３つ以上の車載アンテナについて決定し（Ｓ１５０）、そのキー距離Ｄに基づいてキー位置を推定し（Ｓ１６０）、キー位置が車両の外である場合（Ｓ１７０：ＹＥＳ）、３つ以上の車載アンテナのうちの少なくとも１つについて、ＲＳＳＩを車両のボディの金属部分による電波減衰を考慮して補正した補正ＲＳＳＩとした場合の補正キー距離Ｄｃを再決定し（Ｓ１９０）、補正キー距離Ｄｃを用いてキー位置を再推定する（Ｓ２００）。【選択図】図６
PORTABLE MACHINE POSITION ESTIMATION SYSTEM AND ON-VEHICLE MACHINE
To provide a portable machine position estimation system that can accurately estimate the position of a portable machine even when it is outside of a vehicle.SOLUTION: A portable machine position estimation system performs the steps of: determining a key distance D, which is a distance between an on-vehicle antenna and an electronic key, with respect to three or more on-vehicle antennas, based on an RSSI of a radio wave received by the electronic key (S150); estimating a key position based on the key distance D (S160); when the key position is outside of a vehicle (S170: YES), determining newly a calibrated key distance Dc in the case that the RSSI, with reference to at least one of the three or more on-vehicle antennas, is a calibrated RSSI calibrated in consideration of a radio wave attenuation due to a metal portion of a vehicle body (S190); and estimating newly the key position using the calibrated key distance Dc (S200).SELECTED DRAWING: Figure 6
【課題】携帯機が車両の外にあっても精度よく携帯機の位置を推定できる携帯機位置推定システムを提供する。【解決手段】電子キーが受信した電波のＲＳＳＩに基づいて、車載アンテナから電子キーまでの距離であるキー距離Ｄを、３つ以上の車載アンテナについて決定し（Ｓ１５０）、そのキー距離Ｄに基づいてキー位置を推定し（Ｓ１６０）、キー位置が車両の外である場合（Ｓ１７０：ＹＥＳ）、３つ以上の車載アンテナのうちの少なくとも１つについて、ＲＳＳＩを車両のボディの金属部分による電波減衰を考慮して補正した補正ＲＳＳＩとした場合の補正キー距離Ｄｃを再決定し（Ｓ１９０）、補正キー距離Ｄｃを用いてキー位置を再推定する（Ｓ２００）。【選択図】図６
PORTABLE MACHINE POSITION ESTIMATION SYSTEM AND ON-VEHICLE MACHINE
携帯機位置推定システムおよび車載機
TAKASUKA NAOHITO (author) / SUZUKI YOICHIRO (author) / TOKUNAGA HIDETARO (author)
2020-07-27
Patent
Electronic Resource
Japanese
VEHICLE COMMUNICATION SYSTEM, ON-VEHICLE MACHINE AND PORTABLE MACHINE
| European Patent Office | 2017