Vehicle-purpose object sensing apparatus

A vehicle-purpose object sensing apparatus comprising:

• an object sensing member (M1) in which electromagnetic waves are transmitted from transmission members (1, 2) to a predetermined region, and a distance detecting member (5) detects at least a distance of an object based upon a result of receiving electromagnetic waves reflected from the object by reception members (3, 4);
• and
• an abnormal condition judging member (M2) for judging an abnormal condition of the object sensing member (M1) based upon a reception level of the electromagnetic waves received by the reception members (3, 4), and
• a drive distance detecting member (M4) for detecting a drive distance of a vehicle, wherein
• the abnormal condition judging member (M2) judges as to whether or not the object sensing member (M1) is under abnormal condition based upon a difference between a maximum value and a minimum value of the reception levels of the electromagnetic waves received by the reception members (3, 4), and
• the abnormal condition judging member (M2) judges that the object sensing member (M1) is under abnormal condition based upon the difference between the maximum value and the minimum value of the reception levels within a predetermined drive distance detected by the drive distance detecting member (M4).