| 摘要 |
PROBLEM TO BE SOLVED: To detect accurately and quickly decline of reception sensitivity of an on-vehicle radar device.SOLUTION: In a signal processing device of a radar transmitter/receiver loaded on a vehicle for transmitting a transmission signal to the periphery of the vehicle and receiving the transmission signal reflected by a target, an image recognition means loaded on the vehicle detects the type and the distance of the target based on an imaged image of the target; and a reception sensitivity monitoring means detects whether the level of a receiving signal or the level of a signal generated from the receiving signal is higher than a reference level, in correlation with the kind and the distance of the target, and thereby a proper reference level can be applied to the level of the receiving signal or the signal generated from the receiving signal. Consequently, decline of reception sensitivity can be detected accurately and quickly. |
