Biological information detection device

• US 10,357,203 B2
• Filed: 01/07/2016
• Issued: 07/23/2019
• Est. Priority Date: 07/12/2013
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Takahashi, Yusuke, Aoshima, Ichiro
• Primary Examiner(s): Bloch, Michael R
• Application Number:
  US14/990,714
• Publication Number:
  US 20160113588A1
• Time in Patent Office: 1,293 Days
• Field of Search: None
• 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 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6824 Arm or wrist
• 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
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence

Abstract

A biological information detection device or the like which can determine a mounted state or an unmounted state with high accuracy, or can appropriately present information on the basis of a determination result is to be provided.

A biological information detection device includes a pulse wave detection unit 10 that outputs a pulse wave sensor signal and a processing unit 100 that processes the pulse wave sensor signal, in which the processing unit 100 performs a detachment detection process of the biological information detection device on the basis of a DC component change value of the pulse wave sensor signal in a predetermined period.

Claims

1. A biological information detection device comprising:

a pulse sensor configured to be mounted to a user and to output a pulse wave sensor signal; and

a processor configured to receive the pulse wave sensor signal and perform at least one detachment detection process to determine that the pulse wave sensor is detached from the user, wherein a first detachment detection process of the at least one detachment detection process is on a basis of a first change value of a DC component of the pulse wave sensor signal in a predetermined period and a second change value of the DC component of the pulse wave sensor signal in a second period which includes the predetermined period and is longer than the predetermined period, and

wherein the processor is further configured to give an instruction for stopping recording or communication of pulse wave information based on the pulse wave sensor signal, to give an instruction for recording or communication of pulse wave information correlated with information indicating that the pulse wave information is acquired in a detachment period, to give an instruction for stopping display of pulse wave information based on the pulse wave sensor signal, or to perform a display switching process in a case where detachment of the biological information detection device is detected.

2. The biological information detection device according to claim 1, wherein the processor is configured to determine that the biological information detection device is detached in a case where the first change value of the DC component of the pulse wave sensor signal in the predetermined period exceeds a predetermined threshold value, and the second change value of the DC component of the pulse wave sensor signal in the second period exceeds a second threshold value.

3. The biological information detection device according to claim 1, further comprising:

a body movement sensor configured to output a body movement signal,

wherein the processor is further configured to determine that the biological information detection device is detached in a second detachment detection process of the at least one detachment detection process in a case where the first change value of the DC component of the pulse wave sensor signal in the predetermined period exceeds a predetermined threshold value, and the body movement signal in a period corresponding to the predetermined period is equal to or smaller than a predetermined body movement threshold value.

4. The biological information detection device according to claim 1, wherein the processor is configured to perform an initialization process of a parameter in a pulse wave determination process based on the pulse wave sensor signal in the case where detachment of the biological information detection device is detected through the at least one detachment detection process.

5. The biological information detection device according to claim 1, wherein the processor is further configured to perform a remounting detection process of the biological information detection device on a basis of a third change value indicating a change of the DC component of the pulse wave sensor signal in a third period which is a period after detachment of the biological information detection device is detected through the at least one detachment detection process.