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:
Aug. 28, 2012
Filed:
Jul. 27, 2005
Hiroshi Yamanaka, Moriguchi, JP;
Yoshifumi Watabe, Tondabayashi, JP;
Yoshiaki Honda, Souraku-gun, JP;
Kousaku Kitada, Neyagawa, JP;
Hiroshi Kawada, Neyagawa, JP;
Tomoo Ohtsuka, Takarazuka, JP;
Kazuo Sawada, Katano, JP;
Hiromichi Goto, Hirakata, JP;
Hiroshi Yamanaka, Moriguchi, JP;
Yoshifumi Watabe, Tondabayashi, JP;
Yoshiaki Honda, Souraku-gun, JP;
Kousaku Kitada, Neyagawa, JP;
Hiroshi Kawada, Neyagawa, JP;
Tomoo Ohtsuka, Takarazuka, JP;
Kazuo Sawada, Katano, JP;
Hiromichi Goto, Hirakata, JP;
Panasonic Corporation, Osaka, JP;
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.