公开(公告)号：US4634275A

公开(公告)日：1987-01-06

申请号：US631783

申请日：1984-07-17

申请人： Mamoru Yoshida ,  Mituo Kamemoto

发明人： Mamoru Yoshida ,  Mituo Kamemoto

IPC分类号： G01J1/00 ,  G01M11/06 ,  G01J1/20

CPC分类号： G01M11/065 ,  G01M11/064

摘要： A method of examining the state of alignment of headlamp beam axis has the following steps: taking up by a TV camera the image of the light distribution pattern of a headlamp beam on a screen; specifying a closed curved area of illumination intensities higher than a predetermined level in the taken-up image of the light distribution pattern; determining the position of the geometrical center of the specified closed curved area and displaying the position of the geometrical center on a monitor TV; measuring the area of the specified closed curved area; comparing the measured actual area of the closed curved area with a command area; adjusting the quantity of light received by the TV camera in accordance with the result of the comparison until the measured actual area of the closed curved area becomes equal to the command area; and displaying, on a monitor TV, a pattern representing the allowable range and a mark representing the position of the beam axis. When the marks falls within the allowable range, it is judged that the state of alignment of the beam axis is acceptable.

摘要翻译： 检查前照灯光束轴的对准状态的方法具有如下步骤：由电视摄像机摄取前照灯光束在屏幕上的配光图案; 指定在配光图案的被摄取图像中高于预定水平的照明强度的闭合弯曲区域; 确定指定的闭合弯曲区域的几何中心的位置并在监视器TV上显示几何中心的位置; 测量指定的闭合弯曲区域的面积; 将封闭弯曲区域的测量实际面积与指挥区域进行比较; 根据比较结果调整TV摄像机接收到的光量，直到被测实际的闭合弯曲区域的实际面积变得等于指令区域; 并且在监视器TV上显示表示允许范围的图案和表示光束轴的位置的标记。 当标记落在允许范围内时，判断光束轴的对准状态是可接受的。