Invention Grant
- Patent Title: Heartbeat rate calculation device and method
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Application No.: US16978031Application Date: 2019-03-01
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Publication No.: US11406309B2Publication Date: 2022-08-09
- Inventor: Rieko Sato , Nobuaki Matsuura , Kei Kuwabara , Takayuki Ogasawara
- Applicant: Nippon Telegraph and Telephone Corporation
- Applicant Address: JP Tokyo
- Assignee: Nippon Telegraph and Telephone Corporation
- Current Assignee: Nippon Telegraph and Telephone Corporation
- Current Assignee Address: JP Tokyo
- Agency: Slater Matsil, LLP
- Priority: JPJP2018-039446 20180306,JPJP2018-080426 20180419
- International Application: PCT/JP2019/008061 WO 20190301
- International Announcement: WO2019/172111 WO 20190912
- Main IPC: A61B5/00
- IPC: A61B5/00 ; A61B5/316 ; A61B5/304 ; A61B5/0245
Abstract:
A first calculation unit calculates the heart rate of a subject from a plurality of instantaneous heart rates by averaging processing with an IIR filter using a first coefficient. Note that the first coefficient is a numerical value less than 1, and is a fixed value. A second calculation unit calculates the heart rate of the subject from the plurality of instantaneous heart rates by averaging processing with an IIR filter using a second coefficient. The second coefficient is a numerical value less than 1, and is a variable value. A switching unit switches between the first calculation unit and the second calculation unit based on a difference between the precedingly calculated heart rate and a latest instantaneous heart rate.
Public/Granted literature
- US20210000366A1 HEARTBEAT RATE CALCULATION DEVICE AND METHOD Public/Granted day:2021-01-07
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