Patent ID: 6243024
Filing Date: 2001-06-05
Classification: B60R,G01S,G08G

Abstract:
A device for monitoring surroundings of vehicle comprising:a transmitting antenna having a predetermined directivity;an oscillator for generating electromagnetic waves emitted from said receiving antenna;a receiving antenna for catching the electromagnetic waves reflected by an object;a means for receiving signals from said transmitting and receiving antennas and measuring a range from the object based on a time difference between the transmitting and receiving signals and a relative velocity based on a Doppler frequency of the caught electromagnetic waves;an operating means for judging a degree of risk of colliding with the object based on a result of the measurements obtained by said means for receiving and measuring;an alarm for notifying a driver the risk based on the degree of the risk judged by said operating means; anda radome arranged in a front of said transmitting and receiving antennas, wherein at least one of intervals between an electromagnetic wave receiving surface of said receiving antenna and an inside of said radome has a size corresponding to about one wavelength or a half wavelength of a period of the oscillated electromagnetic waves.