Patents by Inventor Tomoo Ohtsuka

Tomoo Ohtsuka 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).

  • Acoustic wave sensor
    Patent number: 8254209
    Abstract: In an acoustic wave sensor for detecting a distance to an object and an orientation where the object is located with using acoustic waves, an acoustic wave generating device generating an acoustic wave by applying thermal impact to the air with no mechanical vibration is used as a wave transmitting device, and an electric capacitance microphone converting variation of pressure due to acoustic wave to variation of an electric signal is used as each wave receiving device. Therefore, dead zone caused by reverberation component included in the acoustic wave transmitted from the wave transmitting device and dead zone caused by reverberation component included in wave receiving signals outputted from the wave receiving devices can be shortened and angular sensitivity of the acoustic wave sensor can be increased, in comparison with a conventional acoustic wave sensor using piezoelectric devices as the wave transmitting device and the wave receiving devices.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: August 28, 2012
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Yamanaka, Yoshifumi Watabe, Yoshiaki Honda, Kousaku Kitada, Hiroshi Kawada, Tomoo Ohtsuka, Kazuo Sawada, Hiromichi Goto
  • Acoustic Wave Sensor
    Publication number: 20080291784
    Abstract: In an acoustic wave sensor for detecting a distance to an object and an orientation where the object is located with using acoustic waves, an acoustic wave generating device generating an acoustic wave by applying thermal impact to the air with no mechanical vibration is used as a wave transmitting device, and an electric capacitance microphone converting variation of pressure due to acoustic wave to variation of an electric signal is used as each wave receiving device. Therefore, dead zone caused by reverberation component included in the acoustic wave transmitted from the wave transmitting device and dead zone caused by reverberation component included in wave receiving signals outputted from the wave receiving devices can be shortened and angular sensitivity of the acoustic wave sensor can be increased, in comparison with a conventional acoustic wave sensor using piezoelectric devices as the wave transmitting device and the wave receiving devices.
    Type: Application
    Filed: July 27, 2005
    Publication date: November 27, 2008
    Applicant: MATSUSHITA ELECTRIC WORKS, LTD.
    Inventors: Hiroshi Yamanaka, Yoshifumi Watabe, Yoshiaki Honda, Kousaku Kitada, Hiroshi Kawada, Tomoo Ohtsuka, Kazuo Sawada, Hiromichi Goto