| 摘要 |
PURPOSE:To enable the generation of a collision alarm in timing fit for the driving technique, by automatically rewriting an alarm distance corresponding to braking timing. CONSTITUTION:When a brake is stepped on, a brake signal (a) comes to a high level and ground speed, the relative speed with an object and the distance (l) from the object inputted to a treatment apparatus 20 are latched while the alarm distance lA corresponding to the ground speed and the relative speed is read from memory 21. When lA<l is formed between both distances, a definite value DELTAx is added to the distance lA in the apparatus 20 and the obtained distance value is compared with the upper limit value X1 of the alarm distance corresponding to the corresponding ground speed and relative speed read from the memory 21. Unless a new alarm distance exceeds the upper limit value X1 from this comparison result, the alarm distance of the memory 21 is automatically rewritten. Similarily, when the distance lA is lA>l, the distance is automatically rewritten to the alarm distance with the lower limit value or more. By this constitution, a collision alarm can be generated in timing fit for the driving technique. |
