Patents by Inventor Tanemichi Chiba

Tanemichi Chiba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ultrasonic sonar and method using transmission frequency different from reverberation frequency
    Publication number: 20010012238
    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.
    Type: Application
    Filed: January 24, 2001
    Publication date: August 9, 2001
    Inventors: Nobuyuki Iwasaki, Hiroyuki Kani, Takeo Tsuzuki, Tanemichi Chiba, Fumio Asakura