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:
May. 06, 2014
Filed:
Mar. 29, 2013
Act Medical Service Co., Ltd., Fukushima, JP;
Seiichi Takenoshita, Fukushima, JP;
Shintaro Chiba, Tokyo, JP;
Yutaka Hata, Hyogo, JP;
Tokuko Saito Wiedemann, El Cerrito, CA (US);
Hiromichi Annoh, Fukushima, JP;
Asako Yagi, Kanagawa, JP;
Shinichi Takahashi, Fukushima, JP;
Fukuto Handa, Fukushima, JP;
Toshikuni Yajima, Fukushima, JP;
Act Medical Service Co., Ltd., Fukushima, JP;
Abstract
A vessel pulse wave measurement system performs vessel pulse wave measurement using an optical probe circuit provided with an optical probe including a light emitting element and a light receiving element, a drive circuit, and a detection circuit. A measurement device directly and synchronously feeds back an electrical signal from the optical probe to the drive circuit as a drive signal to generate a self-oscillation signal from the detection circuit, and measures the self-oscillation signal as a vessel pulse wave signal. A controller controls an operating point of at least one of the detection circuit and the drive circuit such that the self-oscillation signal substantially reaches a maximum level thereof.