BIOLOGICAL INFORMATION DETECTION DEVICE

• US 20160113588A1
• Filed: 01/07/2016
• Published: 04/28/2016
• 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
• Granted Patent: US 10,357,203 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 wave detection unit that outputs a pulse wave sensor signal; and

a processing unit that processes the pulse wave sensor signal,

wherein the processing unit 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.

2. The biological information detection device according to claim 1,

wherein the processing unit performs the detachment detection process on the basis of the DC component change value of the pulse wave sensor signal in the predetermined period, and a second change value indicating a change in 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.

3. The biological information detection device according to claim 2,

wherein the processing unit determines that the biological information detection device is detached in a case where the DC component change value of the pulse wave sensor signal in the predetermined period exceeds a predetermined threshold value, and the second change value in the second period exceeds a second threshold value.

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

a body movement sensor that outputs a body movement signal,

wherein the processing unit determines that the biological information detection device is detached in a case where the DC component change value 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.

5. The biological information detection device according to claims 1,

wherein the processing unit performs an initialization process of a parameter in a pulse wave determination process based on the pulse wave sensor signal in a case where detachment of the biological information detection device is detected through the detachment detection process.

6. The biological information detection device according to claims 1,

wherein the processing unit obtains a difference value between an i-th DC component value of the pulse wave sensor signal at an i-th (where i is a positive integer) sampling timing and a j-th DC component value of the pulse wave sensor signal at a j-th (where j is an integer satisfying j>

i) sampling timing, as the DC component change value, and performs the detachment detection process on the basis of the obtained DC component change value.

7. The biological information detection device according to claims 1,

wherein the processing unit determines that the biological information detection device is detached in a case where the DC component change value of the pulse wave sensor signal in the predetermined period exceeds a predetermined threshold value.

8. The biological information detection device according to claims 1,

wherein the processing unit performs a remounting detection process of the biological information detection device on the basis of a third change value indicating a change in 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 detachment detection process.

9. A biological information detection device comprising:

a pulse wave detection unit that outputs a pulse wave sensor signal; and

a processing unit that processes the pulse wave sensor signal,

wherein, in a case where detachment of the biological information detection device is detected, the processing unit gives an instruction for stopping recording or communication of pulse wave information based on the pulse wave sensor signal, or 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.

10. The biological information detection device according to claim 9,

wherein, in a case where remounting of the biological information detection device is detected, and a process of measuring pulse wave information based on the pulse wave sensor signal is successful, after detachment of the biological information detection device is detected, the processing unit gives an instruction for recording or communication of the pulse wave information.

11. The biological information detection device according to claim 9,

wherein the processing unit sets a plurality of states including a mounted state corresponding to a case where the biological information detection device is mounted, an unmounted state corresponding to a case where the biological information detection device is detached, and an intermediate state corresponding to the middle between the mounted state and the unmounted state, and gives the instruction for stopping recording or communication or gives the instruction for recording or communication on the basis of a transition process between the plurality of set states.

12. The biological information detection device according to claim 11,

wherein the processing unit

performs the transition process from the unmounted state to the intermediate state in a case where a mounting detection event is detected in the unmounted state;

and

performs the transition process from the intermediate state to the mounted state in a case where a pulse wave information measurement successful event is detected in the intermediate state.

13. The biological information detection device according to claim 11,

wherein the processing unit

performs a detection process of a detachment event and an impact occurrence event in the mounted state;

determines that the biological information detection device is detached and performs the transition process from the mounted state to the unmounted state in a case where the detachment event is detected; and

determines detection of an abnormality signal indicating that it is doubtful that the biological information detection device is detached and performs the transition process from the mounted state to the intermediate state in a case where the impact occurrence event is detected.

15. The biological information detection device according to claims 9,

wherein the processing unit 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, and a second change value indicating a change in 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.

16. The biological information detection device according to claim 15, further comprising:

a body movement sensor that outputs a body movement signal,

wherein the processing unit determines that the biological information detection device is detached in a case where the DC component change value 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.

14. A biological information detection device comprising:

a pulse wave detection unit that is provided with a pulse wave sensor which outputs a pulse wave sensor signal; and

a processing unit that processes the pulse wave sensor signal,

wherein the processing unit

gives an instruction for stopping display of pulse wave information based on the pulse wave sensor signal or performs a display switching process in a case where detachment of the biological information detection device is detected; and

gives an instruction for displaying the pulse wave information in a case where remounting of the biological information detection device is detected and a process of measuring the pulse wave information based on the pulse wave sensor signal is successful after detachment of the biological information detection device is detected.