KR20130016835A - Pulse wave measuring apparatus and wave measuring method using the same - Google Patents

Abstract

PURPOSE: A wrist type pulse measuring device and a pulse measuring method using the same are provided to correctly measure a pulse by comprising multiple pulse wave sensing parts along a radial artery. CONSTITUTION: A belt member(12) is made of flexible materials to bend easily according to a shape of a wrist. A wearing determination sensor unit(15) and a sensor member(20) are mounted along an inner length direction of the belt member. The sensor member comprises a pulse wave detecting sensor unit(21) which senses pulse waves and a contact sensor unit(30) which senses contacts with the skin. A control member(40) is mounted facing back of a hand at outside of the belt member. A display unit(50) indicates measurements results of the health condition outside.

Description

Wrist pulse measuring device and pulse measuring method using same {Pulse Wave Measuring Apparatus and Wave Measuring Method Using The Same}

The present invention relates to a wrist-type pulse measuring apparatus and a pulse measuring method using the same, and more particularly, to a wrist-type pulse measuring apparatus and a pulse measuring method using the same to enable accurate pulse measurement and efficient power management will be.

In general, the pulse is a phenomenon in which blood pressure rapidly flows into the aorta due to the heartbeat, and the heart pushes the blood along the artery each time the heartbeats, which causes the artery to expand and relax. Done. Pulse is usually diagnosed by touching the radial artery or carotid artery on the thumb of the wrist. Through this pulse, the presence or absence of vascular hardening, pulse rate, magnitude, fast and slow, tension, and the difference between the left and right, and the heart rate can be measured by counting the pulse rate for 1 minute. In addition, oriental medicine detects the singularity of the twelve chapters by grasping the harmony of blood and blood flowing through the human body through the pulse method, and mainly detects the intensity and period of the pulse in the state in which the finger is in contact with the three points of the village, coronal and vertebrae. By judging the health of the examinee.

However, when a person performs such a pulsation, the condition of the examinee is judged solely based on the subjective sense and experience of the examinee, and thus requires a long-term medical experience to be mastered, and whether the patient's condition or severity is serious. Because of the processing depending on the senses of the finger, there was a problem that there is a lot of misdiagnosis if skill lacking.

Therefore, in recent years, the research of the pulse measuring device that can objectively and visually check the pulse of the examinee has been actively conducted, and at present, some companies have developed the pulse measuring device and sell it on the market. Such a pulse measuring device is classified into a finger forefinger pulse measuring device and a wrist-type pulse measuring device according to the measurement position.

Here, the wrist-type pulse measuring device is a wrist-worn type, and is configured to measure the user's pulse by using a plurality of sensors for measuring the pulse near the wrist, and the measured signal is transmitted to the health care server through wireless communication. It may also be configured to receive various medical services. Such wrist-type pulse rate measurement device can periodically check its physical condition while being carried by an individual, and the demand thereof is gradually increasing.

However, in the conventional wrist pulse measuring device, even if a slight error occurs in the positioning of the radial artery or the position is correctly selected, the wrist-type pulse measuring device does not detect an accurate measurement when it is not closely attached. Since there are not many people, it is impossible to accurately measure and close the pulse to measure the pulse, accordingly the difference in the measurement results can be severe, there is a problem that the reliability of the diagnosis is lowered.

An object of the present invention for solving the problems of the prior art as described above is provided with a plurality of pulse sensors for measuring the radial artery, so that the error does not occur in positioning, and whether the pulse sensor is properly positioned on the wrist It is to provide a wrist-type pulse measuring device and a pulse measuring method using the same, provided with a contact sensor to determine the accurate pulse measurement.

In order to achieve the above object, the present invention is a belt member that is formed to be worn on the wrist; A pulse wave detection sensor unit installed on the inner circumferential surface of the belt member corresponding to the artery of the wrist in the longitudinal direction to detect pulse waves of the artery; At least one wear determination sensor unit spaced apart from each other along an inner circumferential surface of the belt member to detect whether the wrist is in contact with the wrist; And a control unit configured to receive a pulse wave signal detected from the pulse wave detection sensor unit, calculate a pulse rate, and receive a contact signal sensed by the wear determination sensor unit to determine whether the wrist is in contact with the wrist. Wrist type pulse measuring device is provided.

In addition, the pulse wave detection sensor unit: is provided along the longitudinal direction of the belt member, the light emitting element for irradiating light to the wrist, and is installed adjacent to the light emitting element along the longitudinal direction of the belt member, the reflection from the wrist It provides a wrist-type pulse measuring device, characterized in that it comprises a light receiving element for receiving the light.

The apparatus may further include a contact sensor unit positioned at both sides of each of the pulse wave detection sensor units inside the belt member to detect contact with the wrist, and the control unit may receive a signal detected by the contact sensor unit. Provided is a wrist worn pulse rate measuring device, characterized in that it determines whether or not contact with.

The apparatus may further include a switch for supplying power to a pulse wave sensor unit selected from among the plurality of pulse wave sensor units under control of the controller. After determining whether one or more pulse wave signals belonging to the normal range of the pulse wave signals of the arteries are detected, the switch is controlled to be located at the side of the contact sensor unit in which an abnormal contact signal is detected among the plurality of pulse wave detection sensors. Provided is a wrist-type pulse rate measuring device, characterized in that the power supply to the pulse wave detection sensor unit and the pulse wave detection sensor unit for detecting the pulse wave signals that do not belong to the normal range.

In addition, it provides a wrist-type pulse measuring device, characterized in that it further comprises a communication unit for transmitting the pulse rate calculated by the control unit to the outside.

In addition, the present invention provides a pulse measuring method using a wrist-type pulse measuring apparatus, the wearing step of wearing the belt member on the wrist; A first contact signal determination step of determining whether the contact signal transmitted from the wear determination sensor unit to the control unit is a normal signal and turning on the power of the pulse wave detection sensor unit; A first pulse wave signal transmitting step of transmitting pulse wave signals sequentially sensed by each pulse wave detection sensor unit which is turned on to a controller; A first pulse wave signal determining step of determining whether at least one normal signal among the pulse wave signals sequentially transmitted from each pulse wave detecting sensor unit is determined; It is determined whether the contact signal transmitted from the plurality of touch sensor units to the control unit is a normal signal, and among the plurality of pulse wave detection sensor units, power of the pulse wave detection sensor unit located between the touch sensor units transmitting an abnormal signal is supplied. Determining a second contact signal to be turned off; And a pulse rate calculation step of calculating a pulse rate by extracting a pulse signal from a pulse wave detection sensor unit of which power is turned on, among the plurality of pulse wave detection sensor units.

In the first contact signal determination step, if there is no normal signal among the contact signals transmitted from the wear determination sensor unit, the pulse signal comprising the step of outputting a wearing message of the belt member, characterized in that it comprises a Provide a measurement method.

Further, in the first pulse wave signal determination step, when there is no normal signal among the pulse wave signals transmitted from the pulse wave detection sensor unit, the power of the pulse wave detection sensor unit is turned off, and outputs a re-wear message of the belt member. It provides a pulse measuring method characterized in that it comprises a step.

The method may further include turning off a pulse wave detection sensor unit, which transmits an abnormal signal, among the plurality of pulse wave detection sensor units, between the first pulse wave signal determination step and the second contact signal determination step. In the contact signal determining step, a pulse measuring method is provided, wherein the touch signal detected by the contact sensor units provided at both sides of the pulse wave sensor unit is turned on among the plurality of the contact sensor units. .

Wrist type pulse measuring apparatus and pulse measuring method using the same according to the present invention, when the belt member is worn on the wrist, a plurality of pulse wave detection sensor unit is provided along the radial artery, so that a plurality of pulse wave detection sensor located only near the radial artery In this case, at least one pulse wave detection sensor unit of the plurality of pulse wave detection sensor unit detects the pulse wave of the radial artery, thereby enabling accurate pulse measurement.

In addition, the wrist-type pulse measuring apparatus and the pulse measuring method using the same according to the present invention is provided with contact sensors on both sides of each pulse detection sensor unit, it is possible to determine whether the pulse wave detection sensor unit is in close contact with the skin, accordingly, The reliability of the pulse wave detection signal detected by the pulse wave detection sensor unit is improved.

In addition, the wrist-type pulse measuring device and the pulse measuring method using the same according to the present invention after confirming that the user is wearing the belt member correctly through the wear determination sensor unit, the power of the sensor member is turned on, it is necessary by the control of the controller Since only the sensor member turns the power on or off, unnecessary power consumption can be prevented and the power supply can be efficiently managed.

1 is a view illustrating a wrist-type pulse rate measuring apparatus according to a preferred embodiment of the present invention.
2 is a view illustrating a sensor member provided in the wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention.
3 is a view illustrating a pulse wave sensor unit of the wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention.
4 is a view showing for explaining the control member of the wrist-type pulse rate measuring apparatus according to a preferred embodiment of the present invention.
5 is a view illustrating a communication unit of the wrist-type pulse measuring apparatus according to an embodiment of the present invention.
6 and 7 are flowcharts schematically illustrating a pulse measuring method using a wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention.

Hereinafter, a wrist-type pulse measuring apparatus and a pulse measuring method using the same according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in more detail.

1 is a view illustrating a wrist-type pulse rate measuring apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 1, a wrist-type pulse measuring apparatus 10 according to a preferred embodiment of the present invention includes a belt member 12 that is formed to be worn on a wrist, and along an inner longitudinal direction of the belt member 12. The wearing determination sensor unit 15 and the sensor member 20 are mounted, and the control member 40 is mounted outside the belt member 12.

The belt member 12 may be formed of a flexible material to bend easily according to the shape of the wrist. This belt member 12 is configured to be in good contact with the skin so that the belt member 12 does not slip or loosen well on the wrist after being worn on the wrist.

The wear determination sensor unit 15 detects contact of the user's skin, and includes a touch sensor, an optical sensor, and the like, and faces the bones protruding from the inside of the belt member 12 to the left and right sides of the wrist, respectively. It may be provided at a position opposite to the center of the position and the back of the hand.

The sensor member 20 may include a pulse wave detection sensor unit 21 for detecting pulse waves in an artery located at a wrist of the user, for example, a radial artery, and a contact sensor unit 30 for detecting contact with skin. Include. A plurality of such sensor members 20 are located along the radial artery in the inner side of the belt member 12 so that no error occurs in positioning. Accordingly, if the user places the sensor member 20 only near the radial artery without accurately positioning the sensor member 20 in the radial artery, the user may at least one sensor member 20 of the plurality of sensor members 20. The pulse wave sensor 21 detects the pulse wave in the radial artery, thereby enabling accurate pulse measurement.

The control member 40 is formed in the size of a wrist watch and is mounted at a position facing the back of the hand on the outside of the belt member 12. The control member 40 includes a power supply unit 44, a control unit 42, switches 46 and 47, a conversion unit 48 and a communication unit 49 therein. In addition, the display unit 50 or a speaker (not shown) may be mounted on the outside of the control member 40 to display the state of the power supply unit 44, the health state of the measurement result, or the like outside. have.

2 is a view illustrating a sensor member provided in the wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention, Figure 3 is a pulse wave detection sensor of the wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention It is a figure shown in order to demonstrate a part.

2 and 3, the sensor member 20 of the wrist-type pulse measuring apparatus 10 according to the preferred embodiment of the present invention includes a pulse wave detecting sensor unit 21 and a contact sensor unit 30.

The pulse wave sensor 21 may include an optical type for detecting a pulse wave signal using light and a piezoelectric type for measuring a pulse wave signal using pressure. In the optical type, the pulse wave sensor 21 may be mounted on the belt member 12 to a user's human body. And a light emitting element 22 for irradiating light and a light receiving element 24 mounted on the belt member 12 so as to be adjacent to the light emitting element 22 to receive light reflected from the human body. The pulse wave detection sensor unit 21 measures the change in blood flow, that is, the volume of blood vessels, appearing in the radial artery according to the relaxation and contraction of the heart using light. By the way, when the separation between the radial artery and the pulse wave sensor 21, the external light enters or vibration caused by skin friction other than the pulse, the pulse wave detection signal may be severely distorted. Accordingly, it is important to determine whether the pulse wave sensor 21 is excited without being in close contact with the skin. The present invention includes a contact sensor unit 30 on the left and right sides of each pulse wave sensor unit 21 to determine whether the pulse wave sensor 21 is in close contact with the skin, a pair of contact sensor unit 30 ) And one pulse wave sensor 21 are modularized into one sensor member 20.

As described above, the touch sensor unit 30 detects contact of the user's skin, and includes a touch sensor, an optical sensor, and the like. The touch sensor unit 30 is disposed on both sides of the pulse wave detection sensor unit 21. . It can be seen whether the pulse wave sensor 21 is in close contact with the skin by the contact sensor 30.

4 is a view showing for explaining the control member of the wrist-type pulse rate measuring apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 4, the control member 40 includes a power supply unit 44, a first switch 46, a second switch 47, a conversion unit 48, a control unit 42, and a communication unit 49. It is composed.

The power supply unit 44 is configured to supply power to each component of the wear determination sensor unit 15 and the control member 40.

The first switch 46 receives power from the power supply unit 44, and selectively transmits the supplied power to the pulse wave detection sensor unit 21 under the control of the controller 42. Each pulse wave sensor unit It is connected to (21) separately, it is configured to transmit the power supplied from the power supply unit 44 to each pulse wave detection sensor unit 21 selected by the control unit 42.

The second switch 47 receives power from the power supply unit 44, and selectively transmits the supplied power to the contact sensor unit 30 under the control of the control unit 42, and each touch sensor unit 30 is provided. ) Is integrally or separately connected, and is configured to transmit the power supplied from the power supply unit 44 to the contact sensor unit 30 selected by the control unit 42.

The conversion unit 48 converts the pulse wave analog signal detected by the pulse wave detection sensor unit 21 into a digital signal and transmits the digital signal to the control unit 42.

The controller 42 may receive a pulse wave signal from the pulse wave sensor 21 and calculate a pulse rate of the user by a pulse detection algorithm. In addition, the controller 42 may control the operation of the wrist-type pulse measuring apparatus 10 as a whole. For example, the detection signal transmitted from the wearing determination sensor unit 15 to the control unit 42 may determine whether the user wears the belt member 12 properly. If the user does not properly wear the belt member 12, or when not wearing, the re-wearing message may be transmitted to the communication unit 49 to inform the user that the belt member 12 may be worn again. In addition, by controlling the first switch 46 and the second switch 47, by turning on or off the power transmitted to the pulse wave sensor 21 and the contact sensor 30, to prevent unnecessary power consumption, The lifespan of the power supply unit 44 may be increased. In addition, through the detection signal transmitted from the contact sensor unit 30 to the control unit 42, it may be determined whether the belt member 12 is in close contact with the user's wrist. If the belt member 12 is not in close contact with the wrist, the wearable message may be transmitted to the communication unit 49 to inform the user that the belt member 12 may be properly worn. The pulse wave signal transmitted from the pulse wave sensor to the control unit 42 via the converter unit 48 is calculated as a pulse rate by a pulse detection algorithm stored in the control unit 42. And the user's health state for the pulse rate or pulse rate calculated in the control unit 42 is transmitted to the communication unit 49, the user can easily determine his or her health state. In addition, the control unit 42 may transmit the calculated pulse rate, an alarm sound, a re-wear message, or the like to a speaker (not shown) mounted on the outer side or the side of the control member 40 to notify the user by sound.

The communication unit 49 transmits a pulse rate calculated by the controller 42 or a re-wear message for re-wearing the belt member 12 to the outside by wire or wireless communication, which will be described with reference to the following drawings. .

5 is a view illustrating a communication unit of the wrist-type pulse measuring apparatus according to an embodiment of the present invention.

Referring to FIG. 5, the communication unit 49 transmits information transmitted from the control unit 42 to the display unit 50 (shown in FIG. 5A) or the external server 52 (shown in FIG. 5B). .

The display unit 50 displays the pulse rate, health state or re-wear message transmitted by the communication unit 49 to the outside in letters, numbers, graphs, pictures, etc., and is mounted on the outside of the control member 40. LCD) and the like.

The external server 52 receives a pulse rate, a health state, and the like transmitted from the communication unit 49, and is composed of a computer provided in an external health care center, a control center, or a mobile phone provided by a predetermined doctor, guardian, or the like. do. To this end, the communication unit 49 is a conventional wireless communication such as Bluetooth, ZigBee, is configured to communicate with an external server.

Hereinafter, a pulse measuring method using a wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention will be described in detail.

6 and 7 are flowcharts schematically illustrating a pulse measuring method using a wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention.

Referring to the drawings, the pulse measuring method using the wrist-type pulse measuring apparatus according to a preferred embodiment of the present invention, first, it is determined whether the belt member 12 is correctly worn on the wrist. To this end, the control unit 42 receives the first contact signal transmitted from the wear determination sensor unit 15 (S10), and determines whether the first contact signal is a normal signal, that is, a signal in contact with the skin of the user. (S12), it is checked whether the user wears the belt member 12 correctly. If, at least one of the wear determination sensor unit 15 of the plurality of wear determination sensor unit 15 which transmits the first contact signal to the control unit 42, the abnormal first contact signal, that is, the signal that is not in contact with the skin of the user If it is transmitted to the control unit 42, the control unit 42 determines that the user did not wear the belt member 12 correctly, generates a re-wear message and transmits to the communication unit 49 (S13), the communication unit 49 ) Transmits the re-wear message to the display unit 50 or the like to inform the user to wear the belt member 12 again. When the user determines that the belt member 12 is correctly worn, the user's pulse measurement is attempted. First, the controller 42 controls the first switch 46 to control the pulse wave sensor unit 21. Turn on the power (S14). Thereafter, the controller 42 receives pulse wave signals sequentially sensed by the plurality of pulse wave detection sensor units 21 (S16).

The controller 42 determines whether at least one pulse wave signal of the pulse wave signal transmitted from the pulse wave sensor 21 is a normal pulse wave signal, that is, the pulse wave signal is in a good state so that a normal pulse rate can be measured (S18). This is to determine whether there is at least one sensor member 20 located in the radial artery among the plurality of sensor members 20 provided in the belt member 12. If no normal pulse wave signal is received, The belt member 12 is reversely worn or is determined to be incorrectly worn, and generates a re-wear message and transmits it to the communication unit 49 (S13). At this time, the control unit 42 controls the first switch 46 to turn off the power of all the pulse wave detection sensor unit 21, thereby preventing unnecessary power consumption. And when there is more than one normal pulse wave signal, the control part 42 controls the 2nd switch 47, and turns on the power of the contact sensor part 30. FIG. Then, the plurality of touch sensor units 30 detect whether the user's skin is in close contact with the touch sensor unit 30, and transmit the detection result to the control unit 42 as a second contact signal (S20).

Thereafter, the control unit 42 receives the second contact signal transmitted from the pair of contact sensor units 30 positioned between the respective pulse wave detection sensor units 21, and determines whether there is an abnormal second contact signal. (S22). The abnormal second contact signal is a signal that is not in contact with the skin located on the user's wrist. When one or more abnormal second contact signals are transmitted, the controller 42 controls the first switch 46 to correspond to the abnormal second contact signal. The power of the pulse wave detection sensor unit 21 located between the pair of contact sensor unit 30 is cut off (S24). If none of the normal pulse wave signals are received in the two second contact signals transmitted by the pair of contact sensor units 30 positioned between the respective pulse wave detection sensor units 21, the belt member 12 is worn. It is determined that this is temporarily wrong, and performs the step S22 once more. If no normal pulse wave signal is received thereafter, it is determined that the belt member 12 is worn incorrectly, and a re-wearing message is generated and transmitted to the communication unit 49 (S13).

The controller 42 receives the pulse wave signal from the pulse wave sensor 21 which is still supplied with power (S26), and determines whether the received pulse wave signal is a normal pulse wave signal (S28). At this time, the pulse wave detection sensor unit 21 for transmitting the normal pulse wave signal to the control unit 42 normally operates the pulse wave of the radial artery in a state in which the pair of contact sensor units 30 provided at both sides are in close contact with the skin of the wrist. Since it detects, the received normal pulse wave signal is calculated as a pulse rate using a pulse detection algorithm (S30), and the calculated pulse rate is transmitted to the communication unit 49 so that a user, a guardian, a doctor, or the like can know (S32). . If the pulse wave sensor 21 to transmit the abnormal pulse wave signal to the control unit 42 is not in close contact with the radial artery, the first switch 46 is controlled to cut off the power supply (S29).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.

10: pulse measuring device 12: belt member
15: wear judgment sensor unit 20: sensor member
21: pulse wave detection sensor 22: light emitting element
24: light receiving element 30: contact sensor
40: control member 42: control unit
44: power supply 46: first switch
47: second switch 48: conversion unit
49: communication unit 50: display unit
52: external server

Claims (9)

A belt member formed to be worn on the wrist;
A pulse wave detection sensor unit installed on the inner circumferential surface of the belt member corresponding to the artery of the wrist along a longitudinal direction thereof to detect pulse waves of the artery;
At least one wear determination sensor unit spaced apart from each other along an inner circumferential surface of the belt member to detect whether the wrist is in contact with the wrist; And
And a control unit configured to receive a pulse wave signal detected by the pulse wave detection sensor unit, calculate a pulse rate, and receive a contact signal detected by the wear determination sensor unit to determine whether a contact with a wrist occurs. Type pulse measuring device.
The method of claim 1,
The pulse wave detection sensor unit:
It is installed along the longitudinal direction of the belt member, the light emitting device for irradiating light to the wrist, and is installed adjacent to the light emitting device along the longitudinal direction of the belt member, and includes a light receiving element for receiving the light reflected from the wrist Wrist type pulse measuring device, characterized in that configured to.
The method of claim 1,
It is further located on both sides of each of the pulse wave detection sensor unit inside the belt member, further comprising a contact sensor unit for detecting whether the contact with the wrist,
The control unit receives a signal sensed by the touch sensor unit, the wrist-wearable pulse rate measuring device, characterized in that it determines whether the contact with the wrist.
The method of claim 3, wherein
Power is supplied, and further comprising a switch for supplying power to the pulse wave detection sensor unit selected from the plurality of pulse wave detection sensor unit under the control of the controller,
The control unit,
After determining whether one or more pulse wave signals belonging to the normal range are detected among the pulse wave signals of the arteries detected by the plurality of pulse wave detection sensors,
By controlling the switch, a pulse wave detection sensor unit located on the side of the contact sensor unit in which abnormal contact signals are detected among the plurality of pulse wave detection sensor units and a pulse wave detection sensor unit in which a pulse wave signal not belonging to a normal range is detected is supplied. Wrist-type pulse measuring device, characterized in that the power off.
The method of claim 1,
Wrist type pulse measuring device further comprises a communication unit for transmitting the pulse rate calculated by the control unit to the outside.
In the pulse measuring method using the wrist-type pulse measuring apparatus according to claim 4,
A wearing step in which the belt member is worn on a wrist;
A first contact signal determination step of determining whether the contact signal transmitted from the wear determination sensor unit to the control unit is a normal signal and turning on the power of the pulse wave detection sensor unit;
A first pulse wave signal transmitting step of transmitting pulse wave signals sequentially sensed by each pulse wave detection sensor unit which is turned on to a controller;
A first pulse wave signal determining step of determining whether at least one normal signal among the pulse wave signals sequentially transmitted from each pulse wave detecting sensor unit is determined;
It is determined whether the contact signal transmitted from the plurality of touch sensor units to the control unit is a normal signal, and among the plurality of pulse wave detection sensor units, power of the pulse wave detection sensor unit located between the touch sensor units transmitting an abnormal signal is supplied. Determining a second contact signal to be turned off; And
A pulse rate measuring method comprising: a pulse rate calculating step of calculating a pulse rate by extracting a pulse signal from a pulse wave detection sensor unit of which power is turned on, among the plurality of pulse wave detection sensor units.
The method according to claim 6,
In the first contact signal determination step,
And if there is no normal signal among the contact signals transmitted from the wearing determination sensor unit, outputting a re-wearing message of the belt member.
The method according to claim 6,
In the first pulse wave signal determination step,
And when there is no normal signal among the pulse wave signals transmitted from the pulse wave sensor unit, turning off the power of the pulse wave sensor unit and outputting a re-wearing message of the belt member. How to measure.
The method according to claim 6,
Between the first pulse wave signal determination step and the second contact signal determination step,
Turning off the power of the pulse wave detection sensor unit of the plurality of pulse wave detection sensor unit for transmitting an abnormal signal,
In the second contact signal determination step,
Pulse measurement method characterized in that for transmitting the touch signal sensed by the touch sensor unit provided on both sides of the pulse wave detection sensor unit is turned on of the plurality of the contact sensor unit.

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