JP6747405B2 - 自車位置自信度演算装置 - Google Patents
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Description
この自車位置自信度演算装置によれば、現時点では自車両の車載センサによる物標の検出を妨げるような遮蔽物が存在しなくとも、車両制御の制御内容によっては通過候補位置において自車両が他車両に囲まれる等の状況が想定されることから、車両制御の制御内容と遮蔽物情報とに基づいて遮蔽影響度を演算することで、通過候補位置における遮蔽影響度をより適切に求めることができる。
この自車位置自信度演算装置によれば、基準自信度及び遮蔽影響度に加えて、物標の検出を妨げるような渋滞等の道路環境情報を考慮した道路環境影響度に基づいて自車位置推定の自信度を演算することで、より適切に通過候補位置における自車位置推定の自信度を求めることができる。
この自車位置自信度演算装置では、自車両の目標ルート上の通過候補位置の自車位置推定の自信度を適切に求めることができる。
図1は、第1の実施形態の自車位置自信度演算装置を示すブロック図である。図1に示されるように、第1の実施形態の自車位置自信度演算装置100は、乗用車等の自車両の自車位置推定(ローカライズ)の自信度を演算する。自車両の自車位置推定とは、地図上の物標の位置情報を利用して自車両の地図上の自車位置を推定することである。自車位置推定には周知の手法を採用することができる。物標について詳しくは後述する。
図1に示すように、自車位置自信度演算装置100は、システムを統括的に管理する自信度演算ECU[Electronic Control Unit]10を備えている。自信度演算ECU10は、CPU[Central Processing Unit]、ROM[Read OnlyMemory]、RAM[Random Access Memory]、CAN[Controller Area Network]通信回路等を有する電子制御ユニットである。自信度演算ECU10では、例えば、ROMに記憶されているプログラムをRAMにロードし、RAMにロードされたプログラムをCPUで実行することにより各種の機能を実現する。自信度演算ECU10は、複数の電子ユニットから構成されていてもよい。
次に、自車位置自信度演算装置100による自信度演算処理の一例について説明する。図5は、第1の実施形態における自信度演算処理の一例を示すフローチャートである。図5に示すフローチャートの処理は、自車両Mの走行中に実行される。
続いて、自車位置自信度演算装置100による自信度演算処理の他の例について説明する。図6は、第1の実施形態における自信度演算処理の他の例を示すフローチャートである。図6に示すフローチャートの処理は、自車両Mの自動運転中に実行される。
以上説明した第1の実施形態の自車位置自信度演算装置100では、物標の地図上の位置情報に基づいて通過候補位置における基準自信度を演算すると共に、遮蔽物情報に基づいて通過候補位置における遮蔽影響度を演算する。従って、自車位置自信度演算装置100によれば、通過候補位置における物標の配置等を考慮した基準自信度と自車両の周囲の遮蔽物を考慮した遮蔽影響度とに基づいて、自車位置推定の自信度を適切に求めることができる。
以下、第2の実施形態の自車位置自信度演算装置について図面を参照して説明する。図7は、第2の実施形態の自車位置自信度演算装置を示すブロック図である。図7に示す自車位置自信度演算装置200は、第1の実施形態と比べて、遮蔽影響度に代えて道路環境影響度を用いる点が異なっている。
図7に示すように、第2の実施形態の自車位置自信度演算装置200の自信度演算ECU20は、道路環境情報取得部21及び道路環境影響度演算部22を有している。また、自信度演算部23は、第1の実施形態の自信度演算部16と機能が異なっている。
続いて、第2の実施形態の自車位置自信度演算装置200の自信度演算処理について、図9を参照して説明する。図9は、第2の実施形態における自信度演算処理の一例を示すフローチャートである。図9に示すフローチャートの処理は、自車両Mのエンジンが始動されて走行可能となっているときに実行される。
以上説明した第2の実施形態の自車位置自信度演算装置200では、物標の地図上の位置情報に基づいて通過候補位置における基準自信度を演算すると共に、道路環境情報に基づいて道路環境影響度を演算する。従って、自車位置自信度演算装置200によれば、通過候補位置における物標の配置等を考慮した基準自信度と物標の検出を妨げるような渋滞等の道路環境情報を考慮した道路環境影響度とに基づいて、自車位置推定の自信度を適切に求めることができる。
Claims (1)
- 自車両の自車位置推定に利用される物標の地図上の位置情報を記憶する物標データベースと、
前記物標の前記地図上の位置情報に基づいて、予め設定された前記自車両の通過候補位置における自車位置推定の基準自信度を演算する基準自信度演算部と、
前記自車両の車載センサの検出結果に基づいて、前記自車両の周囲の先行車、後続車、及び並走車のうちの少なくとも一つである遮蔽物に関する遮蔽物情報を取得する遮蔽物情報取得部と、
前記遮蔽物情報に基づいて、前記通過候補位置における自車位置推定の遮蔽影響度を演算する遮蔽影響度演算部と、
前記基準自信度と前記遮蔽影響度とに基づいて、前記通過候補位置における自車位置推定の自信度を演算する自信度演算部と、
を備え、
前記遮蔽影響度演算部は、前記通過候補位置における前記遮蔽物の存在に応じて前記通過候補位置における自車位置推定の遮蔽影響度を演算する、自車位置自信度演算装置。
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JP2017162479A JP6747405B2 (ja) | 2017-08-25 | 2017-08-25 | 自車位置自信度演算装置 |
EP18182840.1A EP3447449B1 (en) | 2017-08-25 | 2018-07-11 | Host vehicle position confidence degree calculation device |
US16/041,971 US10845814B2 (en) | 2017-08-25 | 2018-07-23 | Host vehicle position confidence degree calculation device |
CN201810954306.9A CN109425861B (zh) | 2017-08-25 | 2018-08-21 | 本车位置可信度运算装置 |
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JP7020348B2 (ja) | 2018-08-30 | 2022-02-16 | トヨタ自動車株式会社 | 自車位置推定装置 |
DE102020131996A1 (de) | 2020-12-02 | 2022-06-02 | Bayerische Motoren Werke Aktiengesellschaft | Absichern einer geografischen Position |
US12031829B2 (en) * | 2020-12-03 | 2024-07-09 | Motional Ad Llc | Localization based on surrounding vehicles |
US20230061268A1 (en) * | 2021-08-17 | 2023-03-02 | International Business Machines Corporation | Distributed machine learning using shared confidence values |
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JP3903856B2 (ja) * | 2002-06-14 | 2007-04-11 | 株式会社デンソー | 車両制御装置,プログラム |
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