Electronic device and pulse rate calculating method

• US 8,827,916 B2
• Filed: 12/14/2012
• Issued: 09/09/2014
• Est. Priority Date: 06/12/2008
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kasama, Koichiro
• Primary Examiner(s): D'Angelo, Michael
• Assistant Examiner(s): JANG, CHRISTIAN YONGKYUN
• Application Number:
  US13/715,663
• Publication Number:
  US 20130102911A1
• Time in Patent Office: 634 Days
• Field of Search: 600/481, 600/500, 482/8
• US Class Current: 600/500
• CPC Class Codes: A61B 2560/0462 Apparatus with built-in sensors
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/0255 Recording instruments specially adapted therefor
• CPC Class Codes: A61B 5/22 Ergometry; Measuring muscular strength or the force of a muscular blow exercising apparatus A63B21/00 ; measuring of work or force in general G01L

Abstract

In an electronic device, a pulse rate measuring unit measures user'"'"'s pulse rate. For example, the pulse rate measuring unit obtains a change in blood flow from a light passing through a user'"'"'s fingertip, and measures user'"'"'s current pulse rate based on it. A pulse rate memory unit has previously stored user'"'"'s previous pulse rate. A pulse rate calculator calculates the user'"'"'s pulse rate while changing a ratio of the user'"'"'s current pulse rate measured by the pulse rate measuring unit to the user'"'"'s previous pulse rate previously stored in the pulse rate memory unit after starting to measure the user'"'"'s pulse rate. The user'"'"'s pulse rate calculated by the pulse rate calculator is displayed as the user'"'"'s pulse rate on a display unit.

Claims

1. A non-transitory computer-readable recording medium storing a pulse rate calculating program for displaying a user'"'"'s pulse rate, the pulse rate calculating program causing a computer to perform as:

a pulse rate measuring unit which measures the user'"'"'s current pulse rate;

a pulse rate memory unit which stores the user'"'"'s previous pulse rate; and

a pulse rate calculator which calculates the user'"'"'s pulse rate by calculating a weighted mean while changing a weighted ratio of both a first weight afforded to the user'"'"'s current pulse rate measured by the pulse rate measuring unit and a second weight afforded to the user'"'"'s previous pulse rate stored in the pulse rate memory unit;

wherein the pulse rate calculator calculates the user'"'"'s pulse rate by setting the second weight higher than the first weight at the time of starting the rate calculation and then by gradually increasing the first weight over time, and

wherein the pulse rate calculator outputs the calculated user'"'"'s current pulse rate as the user'"'"'s pulse rate when a predetermined period of time passes after starting the measurement.