According to an embodiment of the present invention, provided is a vehicle speed estimation method that estimates a speed of a vehicle in which at least one black box is mounted, and comprises the following steps of: providing sound information synchronized with a specific image time from the black box; converting the sound information in a time area to frequency data in a frequency area using fast Fourier transform; calculating revolutions per minute (RPM) of a main engine from the frequency data using order analysis; and drawing a speed of the vehicle in the specific image time using the RPM of the main engine and vehicle information of the vehicle.

    본 발명의 일 실시예는, 적어도 하나 이상의 블랙박스가 장착된 차량의 속도를 추정하는 방법에 있어서, 상기 블랙박스로부터 특정 영상 시간과 동기화된 음향 정보를 제공받는 단계, 시간 영역에서의 상기 음향 정보를 고속 푸리에 변환(Fast Furier transform)을 이용하여 주파수 영역에서의 주파수 데이터로 변환하는 단계, 차수 분석(order analysis)을 이용하여 상기 주파수 데이터로부터 주엔진 회전수(RPM)를 계산하는 단계 및 상기 주엔진 회전수와 상기 차량의 차량정보를 이용하여 상기 특정 영상 시간에서의 상기 차량의 속도를 도출하는 단계를 포함하는, 차량의 속도 추정 방법을 제공한다.


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    Title :

    Vehicle speed estimation method and system


    Additional title:

    차량의 속도 추정 방법 및 시스템


    Contributors:

    Publication date :

    2018-09-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / G01P MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK , Messen der Linear- oder Winkelgeschwindigkeit, der Beschleunigung, der Verzögerung oder des Stoßes / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte



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