Patent ID: 6369747
Filing Date: 2002-04-09
Classification: G01S

Abstract:
A radar apparatus mounted on a vehicle, comprising:a beam transmission device for radiating a beam as a transmission signal; a beam reception device for receiving a reception signal reflected from a target object which is within a radiation range of said radiated beam; and a processing unit for detecting the position of said target object from said transmission signal and said reception signal, wherein said processing unit has a roadbed reflection analysis device for analyzing from among the reception signals, a roadbed reflection signal reflected from a roadbed, and incorporates an abnormality judging device for judging an abnormality of said beam transmission device or said beam reception device, based on the analysis results of said roadbed reflection analysis device, and wherein said processing unit detects the position of said target object by using said transmission signal and said reception signal and performing frequency conversion processing to produce an intensity spectrum of all received signals, said processing unit comprises a signal separation device for separating a low-intensity spectrum signal not higher than a previously set predetermined intensity level from among all received spectrum signals which have been frequency-conversion processed by said processing unit, and said roadbed reflection analysis device analyzes said separated low-intensity spectrum signal as the roadbed reflection signal.