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:
Jul. 21, 2009
Filed:
Aug. 17, 2005
Takusige Katura, Tokyo, JP;
Naoki Tanaka, Tokyo, JP;
Hiroki Sato, Oi, JP;
Akiko Obata, Hatoyama, JP;
Atsushi Maki, Fuchu, JP;
Takusige Katura, Tokyo, JP;
Naoki Tanaka, Tokyo, JP;
Hiroki Sato, Oi, JP;
Akiko Obata, Hatoyama, JP;
Atsushi Maki, Fuchu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A typical task assigned for measuring a brain activity signal lasts from 10 to 30 seconds. The frequency band of the Mayer wave noise signal is very close to the frequency bands of brain activity signals, a result, it is difficult to reduce the Mayer wave noise signal using a bandpass filter or a bandcut filter. Light irradiating units and light detecting units for detecting the emitted light that has been passed through or reflected within the tissue are provided. A biological signal measuring unit measures at least one of the pulsation, breathing, blood pressure, and temperature. The relationship between an optical signal obtained by the light detecting unit and a biological signal using non-linear analysis; and a computation for separating the biological noise signal from the optical signal on the basis of the obtained relationship.