公开(公告)号：US06968073B1

公开(公告)日：2005-11-22

申请号：US10132349

申请日：2002-04-24

申请人： Michael E. O'Boyle ,  Gregory G. Schamp ,  Owen A. Davies ,  James C. Demro ,  Debbie E. Nachtegall ,  William P. Wernette

发明人： Michael E. O'Boyle ,  Gregory G. Schamp ,  Owen A. Davies ,  James C. Demro ,  Debbie E. Nachtegall ,  William P. Wernette

IPC分类号： B60R21/015 ,  G06K9/00

CPC分类号： G06K9/00362 ,  B60R21/01538

摘要： An eye-safe light curtain is generated by a plurality of LED's illuminating a cylindrical lens having a corrugated cylindrical surface. A camera generates a first image of an avoidance zone boundary of an air bag inflator with the light curtain off, and a second image of with the light curtain on along the avoidance zone boundary. The first image is subtracted from the second image, and the resulting difference image is binned to enhance signal strength. A penetration of the avoidance zone is classified from features of the leading edge of the binned image, and the air bag inflator is disabled if the avoidance zone is penetrated by an occupant at risk of injury from the deployment thereof. An image of the light curtain may be recovered for high ambient lighting conditions by adapting the exposure time of the camera responsive to the percentage of pixels in a mask region of the first image having values exceeding a threshold.

摘要翻译： 通过照射具有波纹状圆柱面的圆柱形透镜的多个LED产生眼睛安全的光幕。 照相机在关闭光幕时产生气囊充气机的回避区域边界的第一图像，并且沿着回避区域边界产生具有光幕的第二图像。 从第二个图像中减去第一个图像，并将得到的差分图像分样，以增强信号强度。 回避区的穿透被分类为装箱图像的前缘的特征，并且如果逃避区域被部署危险的乘员穿透，则气囊充气机被禁用。 通过根据具有超过阈值的值的第一图像的掩模区域中的像素的百分比来适应照相机的曝光时间，可以恢复光环境的图像以用于高环境照明条件。