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POSITION ESTIMATION SYSTEM AND ON-VEHICLE DEVICE
PROBLEM TO BE SOLVED: To estimate, with improved accuracy, a position relative to a vehicle of a portable device located outside of the vehicle by using radio waves transmitted and received between the vehicle and the portable device while allowing position estimation to cover a longer range.SOLUTION: An on-vehicle device 3 includes: a transmission unit 31 that simultaneously transmits radio waves from a pair of transmission antennas among a first transmission antenna 30a, a second transmission antenna 30b, and a third transmission antenna 30c for transmitting a radio wave at a prescribed frequency in an LF band, and in addition transmits radio waves from one transmission antenna of at least the pair of transmission antennas or a pair of transmission antennas including the one; and a position estimation unit 39 for estimating the position of the portable device relative to a host vehicle on the basis of signals returned from the portable device in response to the radio waves sequentially transmitted by the transmission unit 31.SELECTED DRAWING: Figure 3
【課題】車両と携帯機との間で送受信する電波を利用して車外に位置する携帯機の車両に対する位置を推定することを、位置推定の長距離化を可能にしつつも、より精度よく行う。【解決手段】車載機３は、ＬＦ帯の所定の周波数の電波を送信する第１送信アンテナ３０ａ、第２送信アンテナ３０ｂ、及び第３送信アンテナ３０ｃのうちの一対の送信アンテナから同時に電波を送信させる他に、送信タイミングをずらして、少なくともこの一対の送信アンテナのうちの一方の送信アンテナ若しくはこの一方だけを含む１対の送信アンテナから、電波を送信させる送信部３１と、送信部３１で順次送信させた電波に対して携帯機から返信される信号をもとに、自車に対する携帯機の位置を推定する位置推定部３９とを備える。【選択図】図３
POSITION ESTIMATION SYSTEM AND ON-VEHICLE DEVICE
PROBLEM TO BE SOLVED: To estimate, with improved accuracy, a position relative to a vehicle of a portable device located outside of the vehicle by using radio waves transmitted and received between the vehicle and the portable device while allowing position estimation to cover a longer range.SOLUTION: An on-vehicle device 3 includes: a transmission unit 31 that simultaneously transmits radio waves from a pair of transmission antennas among a first transmission antenna 30a, a second transmission antenna 30b, and a third transmission antenna 30c for transmitting a radio wave at a prescribed frequency in an LF band, and in addition transmits radio waves from one transmission antenna of at least the pair of transmission antennas or a pair of transmission antennas including the one; and a position estimation unit 39 for estimating the position of the portable device relative to a host vehicle on the basis of signals returned from the portable device in response to the radio waves sequentially transmitted by the transmission unit 31.SELECTED DRAWING: Figure 3
【課題】車両と携帯機との間で送受信する電波を利用して車外に位置する携帯機の車両に対する位置を推定することを、位置推定の長距離化を可能にしつつも、より精度よく行う。【解決手段】車載機３は、ＬＦ帯の所定の周波数の電波を送信する第１送信アンテナ３０ａ、第２送信アンテナ３０ｂ、及び第３送信アンテナ３０ｃのうちの一対の送信アンテナから同時に電波を送信させる他に、送信タイミングをずらして、少なくともこの一対の送信アンテナのうちの一方の送信アンテナ若しくはこの一方だけを含む１対の送信アンテナから、電波を送信させる送信部３１と、送信部３１で順次送信させた電波に対して携帯機から返信される信号をもとに、自車に対する携帯機の位置を推定する位置推定部３９とを備える。【選択図】図３
POSITION ESTIMATION SYSTEM AND ON-VEHICLE DEVICE
位置推定システム及び車載機
TOKUNAGA HIDETARO (author) / SAITO TAKASHI (author) / SUMIYA YUJI (author) / SHINODA TAKUJI (author)
2018-06-14
Patent
Electronic Resource
Japanese
POSITION ESTIMATION DEVICE, POSITION ESTIMATION SYSTEM, AND POSITION ESTIMATION METHOD
| European Patent Office | 2020