The rear-end collision risk judgment method in a rear-end collision prevention system

摘要

PURPOSE:To stably judge rear-end collision danger even when errors and omission are generated in data from a sensor by reporting the danger of a rear-end collision when a rear-end collision risk is larger than a first threshold value and driving a rear-end collision evading means when it is larger than a second threshold value larger than the first threshold value. CONSTITUTION:Whether or not the rear-end collision risk is more than the threshold value beta1 of a primary alarm is judged, and when it is YES, whether or not the rear-end collision risk is more than the threshold value beta2 of a secondary alarm is judged (S7 and S8). When it is NO, whether or not same lane travelling confidence is more than a reference value beta4 is judged (S9). When a judged result is YES and the risk recognition confidence of a driver is less than the reference value beta5. an alarming means is driven and the primary alarm is issued (S9, S11 and S12). On the other hand, when the judged result of D=beta1 is YES, whether or not the rear-end collision risk is more than the threshold value beta3 (beta2) is judged (S8 and S10). When the judged result is NO and the same lane confidence is more than the reference value beta4, the secondary alarm is issued by the alarming means (S14).