KR101996417B1 - 자세 정보 기반 보행자 탐지 및 보행자 충돌 방지 장치 및 방법 - Google Patents
자세 정보 기반 보행자 탐지 및 보행자 충돌 방지 장치 및 방법 Download PDFInfo
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Abstract
Description
도 2는 자동차에 따른 PDCMS 상태 변화를 나타내는 블록도이다.
도 3은 본 발명의 일실시예에 따른 자동차의 PDCMS 작동 장치를 개략적으로 나타낸 블록도이다.
도 4는 본 발명의 일실시예에 따른 전방 감지 센서의 구성도이다.
도 5는 본 발명의 일실시예에 따른 ROI 설정을 나타내는 예시도이다.
도 6은 보행자 이동 속도의 개념을 나타낸다.
도 7은 본 발명에 따른 PDCMS 기능을 작동시키기 위한 매핑 테이블의 일례를 나타낸다.
도 8은 본 발명에 따른 PDCMS 기능 작동 방법의 일실시예의 흐름을 나타낸 흐름도이다.
200: 전방 감지 센서
210: 이미지 입력부
220: 관심영역(ROI: Region Of Interest) 설정부
230: 후보 추출부
240: 보행자 판단부
250: 보행자 추적부
300: 차량 센서
400: 전자 제어 유닛
500: 경보부
600: 보행자
700: 자동차
Claims (12)
- 자동차의 주행차선 상 보행자의 존재, 상기 보행자의 상기 자동차에 대한 거리 및 상대 속도를 감지하는 전방 감지 센서;
상기 자동차의 속도를 감지하는 차량 센서;
상기 전방 감지 센서와 상기 차량 센서에서 감지한 정보를 기반으로 PDCMS(Pedestrian Detection and Collision Mitigation System) 기능을 작동하는 전자 제어 유닛; 및
상기 전자 제어 유닛의 제어에 의하여 운전자에게 상기 자동차와 상기 보행자의 충돌을 알리도록 작동하는 경보부를 포함하고,
상기 전방 감지 센서는,
상기 자동차 전방의 이미지를 획득하는 이미지 입력부;
상기 이미지 내 물체의 크기에 대응하는 관심영역(ROI: Region Of Interest)를 설정하는 ROI 설정부;
상기 설정된 ROI에서 상기 물체의 동작에 기반하여 보행자 후보를 추출하는 후보 추출부; 및
데이터 베이스를 포함하고, 상기 추출된 보행자 후보를 상기 데이터 베이스 내 표본 보행자의 자세와 비교하여 상기 보행자에 해당하는지 식별하는 보행자 판단부를 포함하며,
상기 PDCMS 기능은 상기 경보부의 작동, 및 상기 운전자의 브레이크 작동 여부와 관계없는 상기 브레이크의 작동 활성화를 포함하는 것을 특징으로 하고,
상기 전자 제어 유닛은 상기 자동차의 속도가 제1임계 속도보다 낮거나 또는 제2임계 속도보다 큰 경우 상기 PDCMS 기능을 비활성화하여 상기 PDCMS 기능이 작동되지 않도록 제어하고,
상기 ROI 설정부는,
상기 이미지의 크기, 상기 전방 감지 센서의 설치 위치와 각도를 포함하는 설치 환경 정보 및 상기 보행자의 실제 크기에 기초하여 상기 이미지 중의 보행자 영역의 바닥 위치를 결정하고,
상기 보행자 영역의 바닥 위치에 기초하여 상기 ROI를 결정하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 보행자 판단부는 상기 데이터 베이스에 상기 표본 보행자의 자세로서 상기 표본 보행자의 전면부, 후면부, 좌측부, 우측부, 좌측 상반신 또는 우측 상반신 중 적어도 하나에 관련된 정보를 저장하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 2 항에 있어서,
상기 보행자 판단부는 상기 추출된 보행자 후보를 상기 데이터 베이스 내 상기 표본 보행자의 전면부, 후면부, 좌측부, 우측부, 좌측 상반신 또는 우측 상반신과 케스케이드 방식으로 비교하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 전방 감지 센서는,
상기 보행자 판단부에 의하여 식별된 상기 보행자를 추적하는 보행자 추적부를 더 포함하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 4 항에 있어서,
상기 보행자 추적부는,
상기 설정된 ROI 내 상기 보행자의 특징점의 수에 기반하여 상기 보행자를 추적하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 전자 제어 유닛은,
상기 브레이크의 작동 활성화를 상기 브레이크의 작동 활성화 시점부터 상기 자동차와 상기 보행자의 충돌 시점까지 상기 자동차의 속도를 최소한 소정의 속도 이상 감소시키도록 수행하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 전자 제어 유닛은,
상기 브레이크의 작동 활성화를 시작한 뒤에도 상기 운전자에 의하여 가능한 최대치의 감속을 위한 브레이크 작동을 허용하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 전자 제어 유닛은,
상기 자동차의 속도가 상기 제1임계 속도 이상이고 상기 제2임계 속도 이하인 경우 비활성화된 상기 PDCMS 기능을 활성화하여 상기 PDCMS 기능이 작동되도록 제어하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 경보부는,
상기 자동차와 상기 보행자의 충돌을 시각적으로 알리는 디스플레이부 또는 상기 자동차와 상기 보행자의 충돌을 청각적으로 알리는 스피커부를 포함하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 PDCMS 기능은 후방 브레이크 램프 작동을 더 포함하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 제 1 항에 있어서,
상기 PDCMS 기능은 차체 자세 제어 장치(ESC: Electrical Stability Control) 작동을 더 포함하는 것을 특징으로 하는,
자동차의 PDCMS 작동 장치. - 자동차 전방의 이미지를 획득하는 단계;
상기 이미지 내 물체의 크기에 대응하는 관심영역(ROI: Region Of Interest)를 설정하는 단계;
상기 설정된 ROI에서 상기 물체의 동작에 기반하여 보행자 후보를 추출하는 단계;
데이터 베이스를 포함하고, 상기 추출된 보행자 후보를 상기 데이터 베이스 내 표본 보행자의 자세와 비교하여 상기 자동차의 주행차선 상 보행자에 해당하는지 식별하는 단계;
상기 보행자의 상기 자동차에 대한 거리 및 상대 속도를 포함하는 보행자 정보를 감지하는 단계;
상기 자동차의 속도를 포함하는 자동차 정보를 감지하는 단계; 및
보행자 정보 및 자동차 정보를 기반으로 PDCMS(Pedestrian Detection and Collision Mitigation System) 기능을 작동하는 단계를 포함하며,
상기 PDCMS 기능은 운전자에게 상기 자동차와 상기 보행자의 충돌을 알리도록 작동하는 경보부의 작동, 및 상기 운전자의 브레이크 조작 여부에 관계없는 상기 브레이크의 작동 활성화를 포함하는 것을 특징으로 하고,
상기 PDCMS 기능을 작동하는 단계는,
상기 자동차의 속도가 제1임계 속도보다 낮거나 또는 제2임계 속도보다 큰 경우 상기 PDCMS 기능을 비활성화하여 상기 PDCMS 기능이 작동되지 않도록 제어하고,
상기 ROI를 설정하는 단계는,
상기 이미지의 크기, 상기 전방 감지 센서의 설치 위치와 각도를 포함하는 설치 환경 정보 및 상기 보행자의 실제 크기에 기초하여 상기 이미지 중의 보행자 영역의 바닥 위치를 결정하는 단계; 및
상기 보행자 영역의 바닥 위치에 기초하여 상기 ROI를 결정하는 단계를 포함하는,
자동차의 PDCMS 작동 방법.
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