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:
Dec. 03, 2002
Filed:
Jan. 24, 2001
Nobuyuki Iwasaki, Nishio, JP;
Hiroyuki Kani, Nishio, JP;
Takeo Tsuzuki, Toyota, JP;
Tanemichi Chiba, Nukata-gun, JP;
Fumio Asakura, Okazaki, JP;
Nippon Soken, Inc., Nishio, JP;
Abstract
An ultrasonic sonar has a transceiver equipped with an ultrasonic oscillator. An ultrasonic wave is transmitted from the transceiver. The ultrasonic wave reflected from an obstacle is received by the ultrasonic oscillator to detect the obstacle. The transmission frequency of the ultrasonic wave is set to be different from the reverberation frequency. When the obstacle is detected, a microcomputer converts the analog signal received by the ultrasonic oscillator into a digital signal, performs a frequency transform of this signal by Fourier transform to extract only the transmission frequency component, and performs an inverse transform.