| 摘要 |
PURPOSE:To enable the certain measurement of the distance between cars going in the same direction, by issueing an alarm when the receiving intensity in a receiving part is lowered. CONSTITUTION:The distance between a proceeding car and own car going in the same direction is detected by a radar means 1 while the receiving intensity of this means 1 is detected by a receiving intensity detection means 8 and, on the basis of the detection output, a receiving intensity discrimination means 11 discriminates whether the receiving intensity is equal to or less than a predetermined value or not and sends out a receiving intensity abnormal signal when said intensity is the predetermined value or less. An alarm means 12 informs the abnormality in receiving intensity on the basis of the receiving intensity abnormal signal. Therefore, the erroneous measurement of the distance between cars going in the same direction caused by the contraction of a longest measurable distance is prevented. |
