Pulsation detector

• US 10,039,458 B2
• Filed: 06/19/2014
• Issued: 08/07/2018
• Est. Priority Date: 06/21/2013
• Status: Active Grant

• Current Assignee: Takunori Shimazaki
• Original Assignee: Soliton Systems K.K., Takunori Shimazaki
• Inventors: Shimazaki, Takunori, Okuhata, Hiroyuki
• Primary Examiner(s): Downey, John R
• Assistant Examiner(s): Kong, Qingjun
• Application Number:
  US14/309,421
• Publication Number:
  US 20140378780A1
• Time in Patent Office: 1,510 Days
• Field of Search: None
• CPC Class Codes: A61B 5/02427 Details of sensor
• CPC Class Codes: A61B 5/02433 for infrared radiation
• CPC Class Codes: A61B 5/6831 Straps, bands or harnesses
• CPC Class Codes: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured

Abstract

Disclosed is a pulsation detection system for obtaining the accurate pulsation information by removing a noise of a body motion. The system includes a beat detector obtaining a pulse wave information containing a body movement noise and a body motion information, and a pulsation detector outputting a pulsation information after the noise of the body motion is removed from the pulse wave information. The beat detector includes a pulse wave measuring device, and a body motion measuring device having a light source for irradiating light to a skin and a photodetector for detecting a reflected light from the skin, arranged at a position away from the skin. The pulsation detector includes a receiver for receiving the pulse wave information and the body motion information, and a body motion remover for removing the noise so as to output an accurate pulsation information to the output part.

Claims

1. A pulsation detection system comprising,

a beat detector configured to be mounted to a body for obtaining (i) a pulse wave information containing a noise generated by a body motion and (ii) a body motion information, from the body in physical movement, and

a pulsation detector for detecting a pulsation information which is obtained by removing the noise of the body motion from the pulse wave information based on the body motion information and then outputting the detected pulsation information to an output part, wherein

the beat detector comprises,

(a) a pulse wave measuring device for detecting the pulse wave information, the pulse wave measuring device including pulse wave light sources for irradiating light to the body, and a pulse wave photodetector for detecting the light reflected from the body,

(b) a body motion measuring device for detecting the body motion information, the body motion measuring device including a body motion light source for irradiating light to a skin of the body, and a body motion photodetector for detecting the light reflected from the skin,

(c) a transmitter for transmitting the pulse wave information and the body motion information to the pulsation detector, and

(d) a mounting tool for mounting the pulse wave measuring device, the body motion measuring device, and the transmitter, to the body, wherein

the lights irradiated from the pulse wave light sources and the body motion light source have a same green color;

the body motion light source is positioned farther from the skin than the pulse wave light sources, and the body motion photodetector is positioned farther from the skin than the pulse wave photodetector, and

the pulsation detector comprises,

a receiver for receiving the pulse wave information and the body motion information which are transmitted by the transmitter, and

a body motion remover for removing the noise to detect the pulsation information from the received pulse wave information and body motion information, and then outputting the pulsation information to the output part.