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POSITION DETERMINATION DEVICE, POSITION DETERMINATION METHOD, AND ELECTRONIC KEY SYSTEM FOR VEHICLES
To provide a position determination device, a position determination method, and an electronic key system for vehicles with which it is possible to reduce the possibility of a position of a portable instrument for vehicles being erroneously determined.SOLUTION: A smart ECU transmits from a plurality of LF transmitters an LF signal that includes a transmitter number that indicates a transmission source, and measures a distance to a smart key using a BLE communication instrument. The smart key transmits a BLE signal that indicates LF reception intensity per transmission source toward the smart ECU at prescribed timing. The smart ECU holds a map that indicates a combination of the distance and the LF reception intensity that is observable when the smart key exists in a prescribed area such as an area near a vehicle door or in a vehicle interior. The smart ECU verifies an actual observed value pertaining to the distance and the LF reception intensity against contents registered in the map, so as to determine whether or not the smart key exists in a target area.SELECTED DRAWING: Figure 11
【課題】車両用携帯機の位置を誤判定する恐れを低減可能な位置判定装置、位置判定方法、車両用電子キーシステムを提供する。【解決手段】スマートＥＣＵは、複数のＬＦ送信機から、送信元を示す送信機番号を含むＬＦ信号を送信するとともに、ＢＬＥ通信機を用いてスマートキーとの距離を計測する。スマートキーは、送信元ごとのＬＦ受信強度を示すＢＬＥ信号を、所定のタイミングでスマートＥＣＵに向けて送信する。スマートＥＣＵは、スマートキーが車両ドア付近又は車室内といった所定エリアに存在する場合に観測されうる、距離とＬＦ受信強度の組み合わせを示すマップを保持している。スマートＥＣＵは、距離とＬＦ受信強度にかかる実際の観測値と、マップに登録されている内容とを照らし合わせることで、スマートキーが対象エリアに存在するか否かを判定する。【選択図】図１１
POSITION DETERMINATION DEVICE, POSITION DETERMINATION METHOD, AND ELECTRONIC KEY SYSTEM FOR VEHICLES
To provide a position determination device, a position determination method, and an electronic key system for vehicles with which it is possible to reduce the possibility of a position of a portable instrument for vehicles being erroneously determined.SOLUTION: A smart ECU transmits from a plurality of LF transmitters an LF signal that includes a transmitter number that indicates a transmission source, and measures a distance to a smart key using a BLE communication instrument. The smart key transmits a BLE signal that indicates LF reception intensity per transmission source toward the smart ECU at prescribed timing. The smart ECU holds a map that indicates a combination of the distance and the LF reception intensity that is observable when the smart key exists in a prescribed area such as an area near a vehicle door or in a vehicle interior. The smart ECU verifies an actual observed value pertaining to the distance and the LF reception intensity against contents registered in the map, so as to determine whether or not the smart key exists in a target area.SELECTED DRAWING: Figure 11
【課題】車両用携帯機の位置を誤判定する恐れを低減可能な位置判定装置、位置判定方法、車両用電子キーシステムを提供する。【解決手段】スマートＥＣＵは、複数のＬＦ送信機から、送信元を示す送信機番号を含むＬＦ信号を送信するとともに、ＢＬＥ通信機を用いてスマートキーとの距離を計測する。スマートキーは、送信元ごとのＬＦ受信強度を示すＢＬＥ信号を、所定のタイミングでスマートＥＣＵに向けて送信する。スマートＥＣＵは、スマートキーが車両ドア付近又は車室内といった所定エリアに存在する場合に観測されうる、距離とＬＦ受信強度の組み合わせを示すマップを保持している。スマートＥＣＵは、距離とＬＦ受信強度にかかる実際の観測値と、マップに登録されている内容とを照らし合わせることで、スマートキーが対象エリアに存在するか否かを判定する。【選択図】図１１
POSITION DETERMINATION DEVICE, POSITION DETERMINATION METHOD, AND ELECTRONIC KEY SYSTEM FOR VEHICLES
位置判定装置、位置判定方法、車両用電子キーシステム
SAIKI TAKASHI (author) / NAKAKURA YOHEI (author) / MITSUHARU KENICHIRO (author) / TANAKA YASUHIRO (author)
2023-07-03
Patent
Electronic Resource
Japanese
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