The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2005
Filed:
Jan. 27, 2004
Hiroaki Kumon, Kariya, JP;
Yukimasa Tamatsu, Okazaki, JP;
Hiroaki Kumon, Kariya, JP;
Yukimasa Tamatsu, Okazaki, JP;
Denso Corporation, Kariya, JP;
Abstract
A vehicle radar system extracts peak frequencies fbu and fbd of respective beat signals Bto Brepresenting the frequency difference between a transmission signal fs and a plurality of received signals frto fr. The phase difference of respective beat signals Bto Bat the peak frequencies fbu and fbd is converted into a frequency signal. In the case of reflection from a close range road surface or raindrops, the phase difference of each beat signal is irregular. The peak frequency intensity of a converted frequency signal is small. This system compares the peak frequency intensity of the converted frequency signal with predetermined criterion intensity. Then, the system identifies an objective with a close range road surface or raindrops when the peak frequency intensity of the converted frequency signal is not larger than the predetermined criterion intensity.