A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
DISTANCE MEASURING DEVICE
To provide a distance measuring device that allows measures against relay attacks to be appropriately taken even under environment in which distance measuring accuracy deteriorates.SOLUTION: A distance measuring device 100 includes a device 1 provided on a vehicle and a device 2 provided on a key, and calculates distance between the vehicle and the key based on carrier phase detection. At least one of the device 1 and the device 2 is configured so that transmission power at which a plurality of distance measuring signals are transmitted when the key is inside the vehicle is set smaller than transmission power at which the plurality of first distance measuring signals are transmitted when the key is outside the vehicle.SELECTED DRAWING: Figure 1
【課題】測距精度が低下する環境下においても、リレーアタックに対する対策を適切に取ることを可能とする測距装置を提供する。【解決手段】測距装置１００は、車両に設けられた装置１と、キーに設けられた装置２とを含み、キャリア位相検出に基づいて車両とキー間の距離を算出する。装置１と装置２の少なくとも一方において、キーが車両外にあるときに複数の第１測距信号を送信するときの送信電力よりも、キーが車両内にあるときに複数の第１測距信号を送信するときの送信電力は、小さくなるように設定される。【選択図】図１
DISTANCE MEASURING DEVICE
To provide a distance measuring device that allows measures against relay attacks to be appropriately taken even under environment in which distance measuring accuracy deteriorates.SOLUTION: A distance measuring device 100 includes a device 1 provided on a vehicle and a device 2 provided on a key, and calculates distance between the vehicle and the key based on carrier phase detection. At least one of the device 1 and the device 2 is configured so that transmission power at which a plurality of distance measuring signals are transmitted when the key is inside the vehicle is set smaller than transmission power at which the plurality of first distance measuring signals are transmitted when the key is outside the vehicle.SELECTED DRAWING: Figure 1
【課題】測距精度が低下する環境下においても、リレーアタックに対する対策を適切に取ることを可能とする測距装置を提供する。【解決手段】測距装置１００は、車両に設けられた装置１と、キーに設けられた装置２とを含み、キャリア位相検出に基づいて車両とキー間の距離を算出する。装置１と装置２の少なくとも一方において、キーが車両外にあるときに複数の第１測距信号を送信するときの送信電力よりも、キーが車両内にあるときに複数の第１測距信号を送信するときの送信電力は、小さくなるように設定される。【選択図】図１
DISTANCE MEASURING DEVICE
測距装置
YOSHIDA HIROSHI (author) / OTAKA SHOJI (author) / NOUJIN KATSUYA (author) / NISHIKAWA MASAKI (author) / OSHIRO SHOKICHI (author)
2021-09-13
Patent
Electronic Resource
Japanese
DISTANCE MEASURING SYSTEM, DISTANCE MEASURING DEVICE, AND DISTANCE MEASUREMENT METHOD
| European Patent Office | 2020