EP-4736767-A1 - BIOLOGICAL SIGNAL MEASUREMENT DEVICE

EP4736767A1EP 4736767 A1EP4736767 A1EP 4736767A1EP-4736767-A1

Abstract

A biological signal measurement device that is wearable, capable of measuring biological signals from a plurality of channels, and driven by a battery includes: an operation mode switching unit configured to switch between a first operation mode in which the plurality of channels are activated and biological signals from the plurality of channels are measured and a second operation mode in which only some of the channels are activated and biological signals from some of the channels are measured; a remaining battery level acquisition unit configured to acquire remaining battery level information of the battery; a prediction unit configured to predict an operable time of the biological signal measurement device based on power consumption in each operation mode and the remaining battery level; and an output unit configured to output information about a predicted value of an operable time.

Inventors

KIMURA ISHIDA, Yui
KOIZUMI, MASAYUKI
WANG, Danni
KUBO, MITSUAKI
KAWABATA, YASUHIRO
FUJII, KENJI
MATSUMURA, NAOMI
FUKUNAGA, SEIJI
YOSHIDA, TAKUYA

Assignees

OMRON Corporation
Omron Healthcare Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240806

Claims (16)

A biological signal measurement device that is wearable, capable of measuring biological signals from a plurality of channels, and driven by a battery, the biological signal measurement device comprising: an operation mode switching unit configured to switch between a first operation mode in which the plurality of channels are activated and biological signals from the plurality of channels are measured and a second operation mode in which only some of the channels are activated and biological signals from some of the channels are measured; a remaining battery level acquisition unit configured to acquire remaining battery level information of the battery; a prediction unit configured to predict an operable time of the biological signal measurement device based on power consumption in each operation mode and the remaining battery level; and an output unit configured to output information about a predicted value of an operable time.
The biological signal measurement device according to claim 1, wherein the prediction unit predicts a first operable time when the biological signal measurement device continues operating in the first operation mode based on the power consumption in the first operation mode and the remaining battery level and predicts a second operable time when the biological signal measurement device continues operating in the second operation mode based on the power consumption in the second operation mode and the remaining battery level, and the output unit outputs the first operable time and the second operable time as minimum and maximum values, respectively, of the predicted value of the operable time.
The biological signal measurement device according to claim 1, wherein the output unit determines whether charging is necessary based on the predicted value of the operable time and notifies a user that charging is necessary when charging is necessary.
The biological signal measurement device according to claim 3, wherein the output unit controls a timing of a notification such that the notification is provided during a time period in which the user is able to charge the battery.
The biological signal measurement device according to claim 4, wherein the output unit considers that the user has returned home when a current time passes a preset time and provides the notification.
The biological signal measurement device according to claim 4, wherein the output unit determines an at-home time period in which the user is at home based on schedule information of the user acquired from an external device and provides the notification during the at-home time period.
The biological signal measurement device according to claim 4, wherein the output unit estimates a time period in which the user is able to charge the battery based on charging history information that records a time when charging has been performed in the past and provides the notification during the time period estimated to be available for charging.
The biological signal measurement device according to claim 4, wherein the output unit determines whether the user is at home based on location information of the user and provides the notification when it is determined that the user is at home.
The biological signal measurement device according to claim 3, wherein the output unit notifies the user that charging is necessary using at least one of sound, vibration, light, and electrical stimulation.
The biological signal measurement device according to claim 3, wherein the output unit includes a notification device configured to notify the user that charging is necessary using light, and the notification device is disposed at a position visible to the user wearing the biological signal measurement device.
The biological signal measurement device according to claim 3, wherein the output unit acquires information about a current time and information about a chargeable time period in which the user is expected to be able to charge the battery the following day and determines that charging is necessary during the current day when an expected operation stop time of the biological signal measurement device, which is calculated from the current time and the operable time, arrives before the chargeable time period on the following day.
The biological signal measurement device according to claim 1, wherein the prediction unit predicts a proportion of a future operation time in each of the first operation mode and the second operation mode and calculates the operable time based on the proportion of the future operation time in each operation mode, the power consumption in each operation mode, and the remaining battery level.
The biological signal measurement device according to claim 11, wherein the prediction unit analyzes time series data of biological signals measured in the past and predicts a proportion of a future operation time in each operation mode based on a result of an analysis.
The biological signal measurement device according to claim 13, wherein the prediction unit divides, by analyzing a state of a waveform of the time series data of the biological signals measured in the past, the time series data into a clean section in which a quality of the waveform is equal to or higher than a predetermined criterion and a noisy section in which the quality of the waveform is lower than the predetermined criterion, predicts a proportion of a future operation time in the first operation mode from a proportion of the noisy section, and predicts a proportion of a future operation time in the second operation mode from a proportion of the clean section.
The biological signal measurement device according to claim 13, wherein the prediction unit divides, by analyzing a state of a waveform of the time series data of the biological signals measured in the past, the time series data into a clean section in which a quality of the waveform is equal to or higher than a predetermined criterion and a noisy section in which the quality of the waveform is lower than the predetermined criterion and further divides the clean section into an abnormal waveform section in which an abnormal waveform appears and a normal waveform section in which the abnormal waveform does not appear, predicts a proportion of a future operation time in the first operation mode from a proportion of the noisy section and the abnormal waveform section, and predicts a proportion of a future operation time in the second operation mode from a proportion of the normal waveform section.
The biological signal measurement device according to any one of claims 1 to 15, wherein the biological signal is an electrocardiogram (ECG) signal.

Description

TECHNICAL FIELD The present invention relates to a wearable biological signal measurement device. BACKGROUND OF INVENTION Wearable biological signal measurement devices worn on a body continuously for a long period of time to monitor biological signals are known. For example, there are a variety of products available, ranging from medical devices such as 24-hour Holter electrocardiograph monitors to consumer devices such as smart watches and life loggers. This type of device has a limitation that it needs to be removed from the body when charging the built-in battery, and therefore biological signals cannot be measured while charging. Although it is not necessary to continue measuring for 24 hours, there is a need to reduce the time when measurement is not possible due to charging and the number of times charging is required as much as possible. It is undesirable for measurements to be interrupted for a long period of time due to a dead battery. Patent Document 1 discloses a wearable electrocardiograph that is worn on the upper arm to measure electrocardiogram (ECG) signals. This electrocardiograph is also driven by a built-in battery, but the above-mentioned charging issue is not particularly taken into consideration. CITATION LIST PATENT LITERATURE Patent Document 1: WO 2005/027720 SUMMARY TECHNICAL PROBLEM Some conventional products have a function that shows the remaining battery level as a percentage or an icon. However, even if a user knows the remaining battery level, it is difficult for the user to predict how many more hours the device can be used (how long the device can continue measuring), making it difficult to determine the appropriate timing to charge it. As the present inventors continue to develop a measurement device having a performance capable of measuring biological signals from a plurality of channels, they are studying dynamically switching the number of active channels (channels performing measurements) depending on the quality of the signals being measured and the user's condition. In the case of such measurement devices, power consumption varies depending on the number of active channels, which raises concerns that it may become even more difficult for users to determine the appropriate timing for charging on their own. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide information to inform a user of an appropriate timing for charging in a wearable biological signal measurement device that can dynamically switch the number of channels to be activated. SOLUTION TO PROBLEM An embodiment of the present disclosure is a biological signal measurement device that is wearable, capable of measuring biological signals from a plurality of channels, and driven by a battery and includes: an operation mode switching unit configured to switch between a first operation mode in which the plurality of channels are activated and biological signals from the plurality of channels are measured and a second operation mode in which only some of the channels are activated and biological signals from some of the channels are measured; a remaining battery level acquisition unit configured to acquire remaining battery level information of the battery; a prediction unit configured to predict an operable time of the biological signal measurement device based on power consumption in each operation mode and the remaining battery level; and an output unit configured to output information about a predicted value of an operable time. The prediction unit may predict a first operable time when the biological signal measurement device continues operating in the first operation mode based on the power consumption in the first operation mode and the remaining battery level and predict a second operable time when the biological signal measurement device continues operating in the second operation mode based on the power consumption in the second operation mode and the remaining battery level. The output unit may output the first operable time and the second operable time as minimum and maximum values, respectively, of the predicted value of the operable time. The output unit may determine whether charging is necessary based on the predicted value of the operable time and notify a user that charging is necessary when charging is necessary. The output unit may control a timing of a notification such that the notification is provided during a time period in which the user is able to charge the battery. The output unit may consider that the user has returned home when a current time passes a preset time, and provide the notification. The output unit may determine an at-home time period in which the user is at home based on schedule information of the user acquired from an external device, and provide the notification during the at-home time period. The output unit may estimate a time period in which the user is able to charge the battery based on charg