KR20180072519A - 각막 반사 검출을 이용한 운전자 상태 모니터링 - Google Patents
각막 반사 검출을 이용한 운전자 상태 모니터링 Download PDFInfo
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Abstract
Description
도 1a 및 도 1b는 눈 동작을 추적하기 위한 예시적인 광 센서 시스템을 나타낸다.
도 2는 운전자의 눈 움직임의 예시적인 도시를 나타낸다.
도 3a 및 도 3b는 각막 반사 검출을 이용하여 운전자 상태를 모니터링하기 위한 예시적인 단순화된 절차를 나타낸다.
도 4는 운전자가 불안전한 방식으로 운전하고 있다는 판단에 응답하여 시정 조치를 실행하기 위한 예시적인 단순화된 절차를 나타낸다.
위에서 참조된 도면들은 반드시 축척에 맞추어 도시된 것은 아니고, 본 개시의 기본 원리를 예시하는 다양한 선호되는 특징들의 다소 단순화된 표현을 제시하는 것으로 이해되어야 한다. 예를 들어, 특정 치수, 방향, 위치, 및 형상을 포함하는 본 개시의 특정 설계 특징들은 특정하게 의도된 애플리케이션 및 사용 환경에 의해 부분적으로 결정될 것이다.
Claims (20)
- 방법에 있어서,
차량에 설치된 광 센서를 이용하여 상기 차량의 운전자의 눈(eye)에서 반사되는 광 정보를 검출하는 단계;
상기 검출된 광 정보에 기반하여, 상기 차량에 구비된 제어 유닛에 의해, 복수의 눈 파라미터들을 측정하는 단계;
상기 복수의 눈 파라미터들에 따라 상기 운전자의 운전 상태를 알려주는 위험 스코어(endangerment score)를 계산하는 단계;
상기 제어 유닛에 의해 상기 계산된 위험 스코어가 위험 임계를 초과하는지 여부를 판단하는 단계; 및
상기 계산된 위험 스코어가 상기 위험 임계를 초과한다는 판단에 응답하여, 상기 제어 유닛에 의해 시정 조치(corrective action)가 수행되는 단계;
를 포함하는 방법. - 제1 항에 있어서,
상기 광 센서는 상기 차량의 후방 뷰 미러에 설치되는 방법. - 제2 항에 있어서,
광원은 상기 광 센서에 결합되는 방법. - 제1 항에 있어서,
상기 복수의 눈 파라미터들의 측정은, 상기 제어 유닛에 의해, 상기 검출된 광 정보에 기반하여 상기 차량의 앞에 있는 도로와 상기 운전자의 시야(gaze)의 정렬을 알려주는 시야 정렬을 측정하는 단계를 포함하는 방법. - 제4 항에 있어서,
상기 시야 정렬의 측정은, 제어 유닛에 의하여, 상기 차량의 전방의 상기 도로로부터 상기 운전자의 상기 시선이 미리 정의된 허용 가능한 양을 초과하여 벗어나는지 여부를 판단하는 단계를 포함하는 방법. - 제1 항에 있어서,
상기 복수의 눈 파라미터들의 측정은, 상기 제어 유닛에 의해, 상기 검출된 광 정보에 기반하여 시간 주기 동안에 상기 운전자의 각막의 정적(stillness)을 알려주는 각막 정적을 측정하는 단계를 포함하는 방법. - 제6 항에 있어서,
상기 각막 정적의 측정은, 상기 제어 유닛에 의해, 상기 시간 주기 동안에 상기 운전자의 상기 각막의 움직임의 횟수를 판단하는 단계를 포함하는 방법. - 제1 항에 있어서,
상기 복수의 눈 파라미터들의 측정은, 상기 제어 유닛에 의해, 상기 검출된 광 정보에 기반하여 시간 주기 동안에 상기 운전자의 눈꺼풀의 닫힘양(closure amount)을 알려주는 눈꺼풀 닫힘을 측정하는 단계를 포함하는 방법. - 제8 항에 있어서,
상기 눈꺼풀 닫힘의 측정은, 상기 제어 유닛에 의해, 상기 시간 주기 동안에 상기 운전자의 상기 눈꺼풀이 닫힌 시간의 최대량을 판단하는 단계를 포함하는 방법. - 제1 항에 있어서,
상기 위험 스코어의 계산은,
상기 검출된 광 정보에 기반하여 상기 차량의 전방의 도로와 상기 운전자의 시선의 정렬을 알려주는 시선 정렬을, 상기 제어 유닛에 의해, 측정하는 단계;
상기 검출된 광 정보에 기반하여 시간 주기 동안에 상기 운전자의 각막의 정적을 알려주는 각막 정적을, 상기 제어 유닛에 의해, 측정하는 단계;
상기 검출된 광 정보에 기반하여 시간 주기 동안에 상기 운전자의 눈꺼풀의 닫힘양을 알려주는 눈꺼풀 닫힘을, 상기 제어 유닛에 의해, 측정하는 단계; 및
상기 측정된 시선 정렬, 각막 정적, 및 눈꺼풀 닫힘을 이용하여 상기 위험 스코어를, 상기 제어 유닛에 의해, 계산하는 단계;
를 포함하는 방법. - 제1 항에 있어서,
원하는 감도에 따라 상기 위계 임계를, 상기 제어 유닛에 의해, 제어하는 단계를 더 포함하는 방법. - 제1 항에 있어서,
운전 방향, 운전 속력, 하루 중 시간, 운전 기간, 주행 기점, 주행 목적지, 상기 차량의 승객들의 수, 상기 차량의 노이즈 량, 및 이동 장치 사용으로 이루어진 그룹에서 선택된 하나 이상의 인자들에 따라 실시간으로 상기 위험 임계를, 상기 제어 유닛에 의해, 조정하는 단계를 더 포함하는 방법. - 제1 항에 있어서,
이전에 설정된 위험 임계를, 상기 제어 유닛에 의해, 판단하는 단계; 및
상기 이전에 설정된 위험 임계에 기반하여 상기 위험 임계를, 상기 제어 유닛에 의해, 설정하는 단계;
를 더 포함하는 방법. - 제1 항에 있어서,
상기 검출된 광 정보에서 노이즈를 제거하기 위하여 상기 검출된 광 정보에 필터를, 상기 제어 유닛에 의해, 적용하는 단계를 더 포함하는 방법. - 제1 항에 있어서,
상기 복수의 눈 파라미터들의 측정은,
상기 차량의 현재 속력을, 상기 제어 유닛에 의해, 판단하는 단계; 및
상기 판단된 차량의 현재 속력에 더 기반하여 상기 복수의 눈 파라미터들을, 상기 제어 유닛에 의해, 측정하는 단계;
를 포함하는 방법. - 제1 항에 있어서,
상기 시정 조치의 실행은 시각적, 청각적, 또는 유형적 경고 표시기를 상기 운전자에게 제공하는 단계를 포함하는 방법. - 제1 항에 있어서,
상기 시정 조치의 실행은 상기 차량의 속력을, 상기 제어 유닛에 의해, 감소시키는 단계를 포함하는 방법. - 제16 항에 있어서,
상기 시정 조치의 실행은,
상기 차량의 상기 속력을 감소시킨 이후에 상기 계산된 위험 스코어가 상기 위험 임계를 계속하여 초과하는지 여부를, 상기 제어 유닛에 의해, 판단하는 단계; 및
상기 계산된 위험 스코어가 상기 위험 임계를 계속하여 초과하는 경우, 상기 차량의 상기 속력을, 상기 제어 유닛에 의해, 더 감소키는 단계;
를 포함하는 방법. - 시스템에 있어서,
차량의 운전자의 눈(eye)에서 반사되는 광 정보를 검출하도록 구성된 상기 차량에 설치된 광 센서; 및
상기 차량에 설치되는 제어 유닛;
을 포함하고, 상기 제어 유닛은:
상기 검출된 광 정보에 기반하여 복수의 눈 파라미터들을 측정하고;
상기 복수의 눈 파라미터들에 따라, 상기 운전자의 운전 상태를 알려주는 위험 스코어(endangerment score)를 계산하고;
상기 계산된 위험 스코어가 위험 임계를 초과하는지 여부를 판단하고; 그리고
상기 계산된 위험 스코어가 상기 위험 임계를 초과한다는 판단에 응답하여 시정 조치(corrective action)를 실행하도록 구성된 시스템. - 차량에 설치된 제어 유닛에 의해 실행 가능한 프로그램 명령들을 포함하는 일시적이지 않은 컴퓨터 판독가능 매체에 있어서, 실행되는 경우에 상기 프로그램 명령들은 상기 제어 유닛으로 하여금,
상기 차량에 설치된 광 센서에 의해 검출된 상기 차량의 운전자의 눈(eye)에서 반사되는 광 정보에 기반하여 복수의 눈 파라미터들을 측정하고;
상기 복수의 눈 파라미터들에 따라 상기 운전자의 운전 상태를 알려주는 위험 스코어를 계산하고;
상기 계산된 위험 스코어가 위험 임계를 초과하는지 여부를 판단하고; 그리고
상기 계산된 위험 스코어가 상기 위험 임계를 초과한다는 판단에 응답하여 시정 조치(corrective action)를 실행하도록 하는 일시적이지 않은 컴퓨터 판독가능 매체.
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