WO2017061637A1

WO2017061637A1 - Wearable device and method for measuring user's physical activity

Info

Publication number: WO2017061637A1
Application number: PCT/KR2015/010528
Authority: WO
Inventors: 이성호; 이종성
Original assignee: 주식회사 스탠딩에그
Priority date: 2015-10-06
Filing date: 2015-10-06
Publication date: 2017-04-13
Also published as: CN106068443A

Abstract

Provided are a wearable device and a method for measuring a user's physical activity. The wearable device, which is a device wearable on a user's body, comprises: at least one acceleration sensor; and a control unit for measuring a user's physical activity related to walking by using acceleration data in a three-axis direction, the data being detected by the at least one acceleration sensor, wherein the control unit compares a variation amount of acceleration data in a first-axis direction with a variation amount of acceleration data in a second-axis direction so as to determine a user's wearing-state, measures the user's physical activity by using a first algorithm in a first wearing-state, and measures the user's physical activity by using a second algorithm in a second wearing-state.

Description

How to measure activity of wearable devices and users

The present invention relates to a wearable device and a user activity measuring method.

A wearable device represents a computer system provided in a form that can be worn on a user's body. The wearable device may measure an amount of activity of the user using various sensors and provide the measurement result to the user. The wearable device may automatically classify the user's activity into sitting, walking, and running according to the intensity of the movement. The wearable device may monitor the amount of activity of the user at a specific cycle to provide additional information such as calorie consumption and activity time.

The technical problem of the present invention is to provide a wearable device capable of measuring the amount of activity of a user using only an acceleration sensor and a method of measuring the amount of activity of a user.

Another technical problem of the present invention is to provide a wearable device and a user's activity measuring method which can improve the measurement accuracy in measuring the user's activity using only the acceleration sensor.

The technical problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, a wearable device may be worn on a user's body, and includes at least one acceleration sensor and acceleration data in three axes detected by the at least one acceleration sensor. The controller may further include a controller configured to measure an amount of activity of the user associated with the step, wherein the controller determines a wearing state of the user by comparing the change amount of the acceleration data in the first axis direction with the change amount of the acceleration data in the second axis direction. In the first wearing state, the amount of activity of the user is measured using a first algorithm, and in the second wearing state, the amount of activity of the user is measured using a second algorithm.

In some embodiments of the present disclosure, the control unit may include the change amount of the acceleration data in the first axial direction and the second except for the acceleration data in the third axial direction perpendicular to the ground among the acceleration data in the three axis direction. The wearing state may be determined by comparing the amount of change of the acceleration data in the axial direction.

In some embodiments of the present disclosure, the first wearing state may be a state in which the wearable device is worn on the arm or leg of the user, and the second wearing state may be a state in which the wearable device is worn on the body of the user. have.

In some embodiments of the present disclosure, the control unit measures the amount of activity of the user using the acceleration data in the three-axis direction passing through the high pass filter in the first wearing state, and low pass in the second wearing state. The amount of activity of the user may be measured using the acceleration data in the three-axis direction passing through the filter.

According to another aspect of the present invention, a wearable device may be worn on a user's body, and includes at least one acceleration sensor and acceleration data in three axes detected by the at least one acceleration sensor. The controller may further include a controller configured to measure an amount of activity of a user associated with a step, wherein the controller determines an operation mode by comparing a change amount of acceleration data in a first axis direction with a change amount of acceleration data in a second axis direction. In the first mode, the amount of activity of the user is measured using the acceleration data in the three-axis direction passing through the first filter, and in the second mode, the user is measured using the acceleration data in the three-axis direction passing through the second filter. Measure your activity.

According to an aspect of the present invention, there is provided a method of measuring an activity amount of a user, the method being performed by a computer system, the method comprising: receiving acceleration data in a 3-axis direction detected by at least one acceleration sensor; Determining a user's wearing state by comparing the change amount of the acceleration data in the first axis direction and the change amount of the acceleration data in the second axis direction among the acceleration data in the 3-axis direction, and the detected acceleration data in the 3-axis direction. By using, the step of measuring the activity of the user associated with the step, wherein the step of measuring the activity of the user, in the first wearing state to measure the activity of the user using a first algorithm, the second wearing state In the step of measuring the activity of the user using a second algorithm.

In some embodiments of the present disclosure, the determining of the wearing state may include the acceleration data in the first axial direction except for the acceleration data in the third axial direction perpendicular to the ground, among the acceleration data in the three axial directions. The wearing state may be determined by comparing the change amount and the change amount of the acceleration data in the second axial direction.

In some embodiments of the present disclosure, the measuring of the amount of activity of the user may include: measuring the amount of activity of the user using the acceleration data in the three-axis direction passing through the high pass filter in the first wearing state; In the second wearing state, the amount of activity of the user may be measured using the acceleration data in the three-axis direction passing through the low pass filter.

According to another aspect of the present invention, there is provided a method of measuring activity of a user, the method being performed by a computer system, the method comprising: receiving acceleration data in three axis directions detected by at least one acceleration sensor, Determining an operation mode by comparing the change amount of the acceleration data in the first axis direction with the change amount of the acceleration data in the second axis direction among the acceleration data in the three axis direction, and using the detected acceleration data in the three axis direction The method may include measuring an amount of activity of a user associated with a step, wherein measuring the amount of activity of the user comprises: in the first mode, the amount of activity of the user using acceleration data in the three-axis direction passing through a first filter. In the second mode, the user's bow is measured using the acceleration data in the three-axis direction passing through the second filter. Measure the amount.

Other specific details of the invention are included in the detailed description and drawings.

According to the present invention, by measuring the activity of the user using only the acceleration sensor, the power consumption of the wearable device can be reduced, and the production price of the wearable device can be reduced.

In addition, according to the present invention, by comparing the amount of change of the acceleration data in the two axial direction to determine the user's wearing state, and measuring the user's activity using a different algorithm according to the wearing state, the user using only the acceleration sensor Can accurately measure activity.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a block diagram schematically illustrating a configuration of a wearable device according to an embodiment of the present invention.

2 is a diagram schematically illustrating a state in which a wearable device according to an embodiment of the present invention is worn on a user's body.

3 is a flowchart schematically illustrating a method of measuring activity of a user according to an embodiment of the present invention.

4 is a flowchart schematically illustrating a configuration of a step of determining a wearing state of the user of FIG. 3.

FIG. 5 is a diagram schematically illustrating a result of comparing changes in acceleration data in two axial directions passing through a high pass filter in a first wearing state. FIG.

FIG. 6 is a diagram schematically illustrating a result of comparing changes in acceleration data in two axial directions passing through a high pass filter in a second wearing state.

FIG. 7 is a view schematically showing a result of comparing changes in acceleration data in two axial directions passing through a low pass filter in a first wearing state.

FIG. 8 is a view schematically showing a result of comparing changes of acceleration data in two axial directions passing through a low pass filter in a second wearing state.

FIG. 9 is a diagram schematically showing acceleration data in the three-axis direction passing through the high pass filter in the first wearing state. FIG.

FIG. 10 is a view schematically showing acceleration data in the 3-axis direction passing through the high pass filter in the second wearing state. FIG.

FIG. 11 is a view schematically showing acceleration data in the three axis direction passing through the low pass filter in the first wearing state. FIG.

12 is a diagram schematically showing acceleration data in the 3-axis direction passing through the low pass filter in the second wearing state.

13 is a block diagram schematically illustrating a configuration of a wearable device according to another exemplary embodiment of the present invention.

14 is a block diagram schematically illustrating a configuration of a wearable device according to still another embodiment of the present invention.

FIG. 15 is a diagram schematically illustrating a case in which movement of a specific body part on which a wearable device is worn according to an embodiment of the present invention is limited.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and are common in the art to which the present invention pertains. It is provided to fully inform those skilled in the art of the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, terms that are defined in a commonly used dictionary are not ideally or excessively interpreted unless they are specifically defined clearly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises" and / or "comprising" does not exclude the presence or addition of one or more other components in addition to the mentioned components.

Referring to FIG. 1, the wearable device 100 according to an embodiment of the present invention may include an acceleration sensor 110, a storage 120, an input 130, an output 140, a controller 150, and a power supply. 160.

The acceleration sensor 110 detects acceleration in three axis directions (for example, X axis, Y axis, and Z axis). Although only one acceleration sensor is illustrated in FIG. 1, the present invention is not limited thereto, and a plurality of acceleration sensors capable of detecting acceleration in one axial direction may be provided. The acceleration sensor 110 may transmit acceleration data in three axis directions to the controller 150.

The storage unit 120 stores various data and commands. The storage unit 120 may store various software modules including system software for operating the wearable device 100 and an application for performing a method for measuring an activity amount of a user according to an embodiment of the present invention. The storage unit 120 may be a random access memory (RAM), read only memory (ROM), erasable-programmable ROM (EPROM), electrically EPROM (EEPROM), flash memory, a removable disk, or well known in the art. Any type of computer readable recording medium may be included.

The input unit 130 receives various information from the user. The input unit 130 may include various input means such as keys, buttons, switches, wheels, and touch pads.

The output unit 140 notifies the user of various information. The output unit 140 may output information in the form of text, video or audio. To this end, the output unit 140 may include a display module 141 and a speaker module 142. The display module 141 is a liquid crystal display (LCD), a thin film transistor (TFT) LCD, an organic light emitting diode (OLED), a flexible display, a three-dimensional display, an electronic ink display, or a technique well known in the art. It may be provided in any form.

The controller 150 controls other components to control the overall operation of the wearable device 100. The controller 150 may perform various software modules including system software for operating the wearable device 100 and an application for performing a method for measuring an activity amount of a user according to an embodiment of the present invention.

The controller 150 may measure the amount of activity of the user associated with the step, such as the number of steps, moving distance, calorie consumption, and activity time, using the acceleration data in the three axis direction transmitted from the acceleration sensor 110. The controller 150 may include a high pass filter 151 and a low pass filter 152 to filter the acceleration data in the 3-axis direction transmitted from the acceleration sensor 110. The controller 150 may optionally measure the amount of activity of the user using the acceleration data in the three-axis direction that passed through the high pass filter 151, or the acceleration data in the three-axis direction that passed through the low pass filter 152. Can measure the amount of activity of the user. Meanwhile, the high pass filter 151 and the low pass filter 152 may be provided as independent components outside the controller 150 or may be provided as internal components of the acceleration sensor 110.

The power supply unit 160 supplies power required for the operation of the acceleration sensor 110, the storage unit 120, the input unit 130, the output unit 140, and the control unit 150. The power supply unit 160 may include a built-in battery or convert power supplied from the outside into a power suitable for the above components.

Meanwhile, since the components illustrated in FIG. 1 are not essential, the wearable device 100 may be modified to include more components or fewer components.

Referring to FIG. 2, the wearable device 100 according to an embodiment of the present invention may be worn on a user's body. For example, the wearable device 100 may be worn on an extremity such as an arm or a leg of a user, or may be worn on a user's torso, but the present invention is not limited thereto and other parts (head, hand, foot, etc.). It may be worn on at least a portion of the body of the user including. Alternatively, the wearable device 100 may be provided inside any item (hat, gloves, shoes, etc.) worn on the user's body.

The pattern of change in acceleration data that appears when a user wears and wears the wearable device 100 on an extremity such as an arm or a leg (that is, a body part with relatively large movement) and the user wears the wearable device 100 (ie, The patterns of change in acceleration data that appear when worn and operated on body parts with relatively small movements will be different. Therefore, in order to improve the accuracy of measuring the activity of the user, a method capable of measuring the activity of the user using different algorithms according to the user's wearing state is required. Information regarding the wearing state may be input from the user, but this may hinder user convenience.

In order to solve this problem, the controller 150 determines the wearing state of the user by comparing the amount of change of acceleration data in two axial directions according to a method of measuring the amount of activity of the user according to an embodiment of the present invention, and the wearing state of the user. According to different algorithms, the user's activity can be measured.

Referring to FIG. 3, in step S410, the controller 150 receives acceleration data in the three axis direction detected by the at least one acceleration sensor 110. The received acceleration data in the 3-axis direction may be acceleration data in the 3-axis direction passed through the high pass filter 151 or the low pass filter 152. In order to reduce the data error, the acceleration data in the three axis direction may be collected at a predetermined unit time (for example, 500 msec).

Subsequently, in step S420, the controller 150 determines a wearing state of the user by comparing the change amounts of the acceleration data in two axial directions among the acceleration data in three axial directions. Specifically, referring to FIG. 4, in step S421, the controller 150 compares the change amount of the acceleration data in the first axis direction with the change amount of the acceleration data in the second axis direction among the acceleration data in the three axis direction. At this time, the controller 150 may use the remaining acceleration data in the first and second axis directions except the acceleration data in the third axis direction perpendicular to the ground among the acceleration data in the three axis directions as the acceleration data for comparing the change amounts. Can be. Subsequently, in step S422, the controller 150 determines whether the ratio of the change amount of the acceleration data in the two axial directions is greater than or equal to the reference value. Here, the reference value may be provided differently depending on whether the acceleration data passed through the high pass filter 151 or the acceleration data passed through the low pass filter 152. Subsequently, in step S423, the controller 150 determines the user's wearing state as the first wearing state if the ratio is greater than or equal to the reference value, and determines the user's wearing state as the second wearing state if the ratio is less than the reference value. Here, the first wearing state may represent a state in which the wearable device 100 is worn on an extremity such as an arm or a leg of the user, and the second wearing state may represent a state in which the wearable device 100 is worn on the torso of a user. .

In consideration of the influence of gravity in the direction of the earth's center, in a state in which there is no user's movement, the controller 150 controls the acceleration data in the third axis direction in which the acceleration data having the largest absolute value among the acceleration data in the three axis direction is perpendicular to the ground. It can be estimated as In order to estimate the vertical axis, the controller 150 may use acceleration data in the three-axis direction passing through the low pass filter 152. Since the wearing position of the user's wearable device 100 may be changed, the controller 150 may perform a low frequency (even while applying the high pass filter 151) at a predetermined unit time (for example, 1 sec or more). By applying the pass filter 152, it is possible to check the acceleration data in the three-axis direction passing through.

FIG. 5 is a view schematically showing a result of comparing changes in acceleration data in two axial directions in a first wearing state, and FIG. 6 is a result of comparing changes in acceleration data in two axial directions in a second wearing state It is a figure which shows schematically. FIG. 7 is a view schematically showing a result of comparing the change amounts of two axial acceleration data passing through the low pass filter in the first wearing state, and FIG. 8 is a view showing two passing through the low pass filter in the second wearing state. It is a figure which shows schematically the result of having compared the change amount of acceleration data of two axial directions. 5 to 8 assume that the Y axis is a vertical axis. 5 and 7, the ratio of the amount of change of acceleration data in the X-axis and Z-axis directions when the wearable device 100 is worn on a limb such as an arm or a leg of a user, and shown in FIGS. 6 and 8. In the state where the wearable device 100 is worn on the user's torso, the ratio of the change amount of the acceleration data in the X-axis and Z-axis directions is different. In FIGS. 5 to 8, the absolute value of the maximum / minimum deviation of the acceleration data in each axial direction is used, but the present invention is not limited thereto.

Subsequently, referring again to FIG. 3, in step S430, the controller 150 measures the amount of activity of the user using different algorithms according to the user's wearing state. In this case, the controller 150 may measure the amount of activity of the user using the first algorithm in the first wearing state, and may measure the amount of activity of the user using the second algorithm in the second wearing state. Specifically, in the first wearing state, the controller 150 may measure the amount of activity of the user using the acceleration data in the three-axis direction passing through the high pass filter 151 according to the first algorithm. In addition, in the second wearing state, the controller 150 may measure the amount of activity of the user by using the acceleration data in the 3-axis direction passing through the low pass filter 152.

FIG. 9 is a view schematically showing acceleration data in the 3-axis direction passing through the high pass filter in the first wearing state, and FIG. 10 is a schematic view of acceleration data in the 3-axis direction passing through the high pass filter in the second wearing state. It is a figure shown. FIG. 11 is a view schematically showing acceleration data in the 3-axis direction passing through the low pass filter in the first wearing state, and FIG. 12 is a schematic view of acceleration data in the 3-axis direction passing through the low pass filter in the second wearing state. It is a figure shown. In the first wearing state, the high pass filter may be applied, and in the second wearing state, the low pass filter may be applied to measure the amount of activity of the user, thereby increasing the accuracy of the measurement.

13 is a block diagram schematically illustrating a configuration of a wearable device according to another exemplary embodiment of the present invention. For convenience of description, duplicate descriptions of components that are the same as the wearable device 100 described with reference to FIG. 1 will be omitted.

Referring to FIG. 13, the wearable device 200 according to another embodiment of the present invention further includes a wireless communication unit 230 and a vibrator 260 as compared with the wearable device 100 described with reference to FIG. 1. do.

The wireless communication unit 230 may wirelessly communicate with an external device (such as a server or a user device). The wireless communication unit 230 may wirelessly communicate with an external device by using a wireless communication method such as mobile communication, WiBro, Wi-Fi, Bluetooth, Zigbee, ultrasonic wave, infrared ray, or RF (Radio Frequency). have. The wireless communication unit 230 may transmit data and / or information received from the external device to the controller 270, and may transmit data and / or information transmitted from the controller 270 to the external device. To this end, the wireless communication unit 230 may include a mobile communication module, a short-range communication module and the like.

The vibrator 260 may perform a vibration notification for notifying the user of various kinds of information.

The controller 270 may perform the method for measuring the amount of activity of the user described with reference to FIGS. 3 to 4.

The wearable device 200 may transmit / receive information regarding an activity amount of a user with various servers or user devices (not shown).

14 is a block diagram schematically illustrating a configuration of a wearable device according to still another embodiment of the present invention. For convenience of description, duplicate descriptions of components that are the same as the wearable device described with reference to FIG. 13 will be omitted.

Referring to FIG. 14, the wearable device 300 according to another embodiment of the present invention further includes a gyro sensor 320 as compared to the wearable device 200 described with reference to FIG. 13.

The gyro sensor 320 detects the angular velocity in three axis directions (for example, a pitch axis, a yaw axis, and a roll axis). Although only one gyro sensor is illustrated in FIG. 14, the present invention is not limited thereto, and a plurality of gyro sensors capable of detecting angular velocity in one axial direction may be provided. The gyro sensor 320 may transmit angular velocity data in three axes to the controller 380.

The controller 380 may perform the method for measuring the amount of activity of the user described with reference to FIGS. 3 to 4.

The wearable device 300 may measure the amount of activity of the user using not only the acceleration data in the three axis direction detected by the acceleration sensor 310 but also the angular velocity data detected in the three axis direction detected by the gyro sensor 320. will be. However, since the gyro sensor 320 requires continuous power supply, the wearable device 300 is detected by the acceleration sensor 310 according to the user's activity measuring method described with reference to FIGS. 3 to 4. The power consumption can be reduced by measuring the amount of activity of the user using only the three-axis acceleration data.

The wearable device according to the embodiment of the present invention may be provided as any computer system wearable on the body of the user, which is not illustrated.

On the other hand, the user's activity measuring method according to an embodiment of the present invention, even if the user wears the wearable device (100 ~ 300) on a specific body part, for example, the arm is fixed or the movement of the arm is limited Even special cases such as the case may be applied in a substantially identical manner. 15 illustrates an example in which movement of a specific body part on which the wearable devices 100 to 300 are worn is restricted. Although FIG. 15 illustrates a case in which a baby carriage is being pushed, there may be a case where a hand is held in a pocket, a predetermined baggage is used, or a walking aid is used. In this case, although the wearable device 100 is worn on the arm, the change pattern of the acceleration data will appear similar to the case where the wearable devices 100 to 300 are worn on the body. Therefore, substantially the same as distinguishing the user's wearing state, the wearable device 100 to 300 compares the change amount of the acceleration data in two axial directions to determine the operation mode, and the first mode (ie, a specific body part). In the mode where the movement of the body is relatively large, the user's activity is measured by using the acceleration data in the three-axis direction passing through the high pass filter, and in the second mode (that is, the mode where the movement of a specific body part is relatively small) The amount of activity of the user may be measured using the acceleration data in the 3-axis direction passing through the pass filter.

The method described in connection with an embodiment of the present invention may be implemented as a software module performed by a processor. The software module may reside in RAM, ROM, EPROM, EEPROM, flash memory, hard disk, removable disk, CD-ROM, or any form of computer readable recording medium well known in the art. .

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

Claims

A device that can be worn on the user's body,

At least one acceleration sensor; And

And a controller configured to measure an amount of activity of a user associated with a step by using acceleration data in the three axis direction detected by the at least one acceleration sensor.

The control unit,

The amount of change of the acceleration data in the first axial direction is compared with the amount of change in the acceleration data in the second axial direction to determine the user's wearing state. In the first wearing state, the amount of activity of the user is measured using a first algorithm, 2, the wearable device of measuring a user's activity using a second algorithm.
The method of claim 1,

The control unit,

The change amount of the acceleration data in the first axis direction and the change amount of the acceleration data in the second axis direction are compared with each other except for the acceleration data in the third axis direction perpendicular to the ground among the acceleration data in the three axis directions. The wearable device that determines the state.
The method of claim 1,

The first wearing state is a state in which the wearable device is worn on the arm or leg of the user, and the second wearing state is a state in which the wearable device is worn on the body of the user.
The method of claim 1,

The control unit,

In the first wearing state, the amount of activity of the user is measured using the acceleration data in the three-axis direction passing through the high pass filter, and in the second wearing state, the acceleration data in the three axis direction passing the low pass filter is measured. Wearable device for measuring the amount of activity of the user using.
A device that can be worn on the user's body,

At least one acceleration sensor; And

And a controller configured to measure an amount of activity of a user associated with a step by using acceleration data in the three axis direction detected by the at least one acceleration sensor.

The control unit,

The operation mode is determined by comparing the change amount of the acceleration data in the first axis direction with the change amount of the acceleration data in the second axis direction, and in the first mode, the user is made using the acceleration data in the 3-axis direction passing through the first filter. The amount of activity of the wearable device, and in the second mode, the wearable device for measuring the amount of activity of the user using the acceleration data in the three-axis direction passed through the second filter.
A method performed by a computer system,

Receiving acceleration data in the three axis direction detected by the at least one acceleration sensor;

Determining the wearing state of the user by comparing the change amount of the acceleration data in the first axis direction with the change amount of the acceleration data in the second axis direction among the acceleration data in the three axis direction; And

Measuring the amount of activity of the user associated with the step by using the detected acceleration data in the three axis direction,

Measuring the amount of activity of the user,

Measuring the amount of activity of the user using a first algorithm in a first wearing state, and measuring the amount of activity of the user using a second algorithm in a second wearing state.
The method of claim 6,

Determining the wearing state,

The change amount of the acceleration data in the first axis direction and the change amount of the acceleration data in the second axis direction are compared with each other except for the acceleration data in the third axis direction perpendicular to the ground among the acceleration data in the three axis directions. A method of measuring the amount of activity of a user that determines a state.
The method of claim 6,

The first wearing state is a state in which the wearable device is worn on the arm or leg of the user, and the second wearing state is a state in which the wearable device is worn on the torso of the user.
The method of claim 6,

Measuring the amount of activity of the user,

In the first wearing state, the amount of activity of the user is measured using the acceleration data in the three-axis direction passing through the high pass filter, and in the second wearing state, the acceleration data in the three axis direction passing the low pass filter is measured. Measuring the amount of activity of the user by using the;
A method performed by a computer system,

Receiving acceleration data in the three axis direction detected by the at least one acceleration sensor;

Determining an operation mode by comparing the change amount of the acceleration data in the first axis direction with the change amount of the acceleration data in the second axis direction among the acceleration data in the three axis direction; And

Measuring the amount of activity of the user associated with the step by using the detected acceleration data in the three axis direction,

Measuring the amount of activity of the user,

In the first mode, the amount of activity of the user is measured using the acceleration data in the three-axis direction passing through the first filter, and in the second mode, the user is measured using the acceleration data in the three-axis direction passing through the second filter. How to measure the amount of activity of a user.