KR20090077163A - A method for calculating the number of the pulse and a portable device for measuring the number of the pulse - Google Patents

Abstract

A method for calculating a pulse frequency and a portable pulse measuring instrument therefor are provided to improve reliability by generating an emergency signal only when the pulse frequency is out of a predetermined range. A sensor(410) senses a pulse signal of a user at a predetermined time. An A/D converter(440) converts the pulse signal into a digital signal. A microprocessor(450) includes a first measuring device, a second measuring device, a first comparator, a controller and a pulse frequency calculator. The first measuring device measures the amplitude change rate of the digital signal. The second measuring device measures the wavelength change rate of the digital signal. The first comparator outputs a first logic signal according to the determination result by determining whether the amplitude change rate or wavelength change rate is within the first predetermined range. The controller generates the first control signal according to the first logic signal. The pulse frequency calculator calculates the pulse frequency from a digital signal in response to the first control signal.

Description

A method for calculating the number of the pulse and a portable device for measuring the number of the pulse}

The present invention relates to a portable pulse measuring device, in particular, is attached to the wrist of the patient to measure and display the pulse rate of the patient at regular intervals, if an abnormality occurs in the measured pulse rate to generate an emergency signal to make quick medical measures The present invention relates to a portable pulse measuring device.

Pulse is the heartbeat caused by the inflow of blood into the aorta. The pulse rate varies from person to person and can vary depending on the situation, but a normal adult's normal pulse rate is about 60 to 90 beats per minute. Therefore, if the pulse rate increases or decreases more than usual for no particular reason, the heart is more likely to have an abnormality, and therefore, the medical staff should take appropriate measures.

On the other hand, if an abnormality occurs in the heart, it may cause irreparable results if not promptly taken in a timely manner. However, frequent visits to medical centers to check for heart abnormalities are cumbersome for everyday life, and it is also practically impossible for medical staff to continuously manage all potentially dangerous subjects.

In order to solve this problem, Korean Patent Application Nos. 1999-0041503 and 2000-0059580 include a pulse detection sensor attached to a part of a human body to detect a pulse, and a pulse rate of a patient detected from the sensor at a predetermined upper limit value. Or an automatic first aid notification system is disclosed that includes a transmitting device that can notify the medical staff of an emergency situation when it is out of the lower limit.

However, the portable pulse measuring device disclosed in the above inventions cannot accurately measure a pulse signal when a patient is exercising while wearing it, thereby causing an incorrect pulse rate and an incorrect emergency signal. The reason for this is that in the exercise situation, not only the pulse signal but also the noise signal due to the exercise are generated, and as a result, it is determined to be an abnormal pulse despite being a normal pulse.

As a result, the medical center determines that the patient has an emergency and makes an emergency response whenever an emergency signal is received.However, when the patient arrives at the scene, the patient is often exercising and consumes unnecessary time and personnel. Done. In addition, if this situation occurs frequently, the reliability of the emergency signal is lowered, which makes it difficult to efficiently perform emergency treatment by the medical staff.

The technical problem to be solved by the present invention is to determine whether the user is exercising based on the pulse signal obtained through the sensor, and to calculate the pulse rate only when not exercising to improve the accuracy of the pulse rate, It is to provide a pulse rate calculation method and a portable pulse rate measuring device that can increase the reliability of the pulse measuring device by generating an emergency signal only when the pulse rate is out of a predetermined range.

Another technical problem to be solved by the present invention is to determine whether the user is exercising based on the pulse signal obtained through the sensor, and indicates that the current situation is in motion along with the calculated pulse rate when exercising, The present invention provides a pulse rate calculating method and a portable pulse measuring device that can increase the reliability of the pulse measuring device by controlling not to generate an emergency signal.

Pulse rate calculation method according to the present invention for solving the above technical problem,

A method of calculating a pulse rate by detecting a pulse signal from a human body, the method comprising: converting a pulse signal obtained from a user into a digital signal, determining whether a rate of change of the digital signal is within a first predetermined range, and the determination result Calculating a pulse rate from the digital signal, and displaying the calculated pulse rate.

Preferably, the step of determining whether the first predetermined range is within, characterized in that the step of determining whether the amplitude change rate of the digital signal is within the first predetermined range.

Preferably, the determining whether the range is within the first predetermined range is characterized in that the determining whether the wavelength change rate of the digital signal is within the first predetermined range.

Preferably, the calculating of the pulse rate is characterized in that the step of not calculating the pulse rate when the rate of change of the digital signal is not within the first predetermined range.

The pulse rate calculation method may further include determining whether the calculated pulse rate is within a second predetermined range, and generating an emergency signal according to the determination result.

Pulse rate calculation method according to the present invention for solving the above technical problem,

A method for calculating a pulse rate by detecting a pulse signal from a human body, the method comprising: converting a pulse signal obtained from a user into a digital signal, calculating and displaying a pulse rate from the digital signal, wherein the rate of change of the digital signal is the first Determining whether it is within a predetermined range, and displaying data indicating an exercise condition according to the determination result.

Preferably, the pulse rate calculation method is characterized in that the step of displaying the data indicating the exercise status, if the rate of change of the digital signal is not within the first predetermined range.

The pulse rate calculation method may further include determining whether the calculated pulse rate is within a second predetermined range, and generating an emergency signal according to the determination result.

Portable pulse measuring device according to the present invention for solving the above technical problem,

A portable pulse measuring device attached to a part of a human body, comprising: a sensor for detecting a pulse signal of a user at predetermined time intervals, an AD converter for converting the detected pulse signal into a digital signal, and a rate of change of the digital signal is a first predetermined value; It is characterized in that it comprises a microprocessor for determining whether it is within the range, calculating the pulse rate from the digital signal according to the determination result, and to display the calculated pulse rate.

Preferably, the microprocessor, the first measuring device for measuring the rate of change of the amplitude of the digital signal, the second measuring device for measuring the rate of change of the wavelength of the digital signal, and whether the amplitude change rate or the rate of change of wavelength is within the first predetermined range. And a first comparator for outputting a first logic signal according to the determination result, a controller for generating a first control signal according to the first logic signal, and a pulse rate from the digital signal in response to the first control signal. It characterized in that it comprises a pulse rate calculator for calculating the.

Preferably, the microprocessor further comprises a second comparator for determining whether the calculated pulse rate is within a second predetermined range, and outputting a second logic signal according to the determination result, wherein the controller is configured to perform the second comparator. The emergency signal is generated in response to the logic signal.

Preferably, the portable pulse measuring apparatus further comprises a time measuring device for measuring the current time, a memory for storing the current time together with the calculated pulse rate, and a screen indicator for displaying the current time together with the calculated pulse rate. It is characterized by.

Portable pulse measuring device according to the present invention for solving the above technical problem,

A portable pulse measuring device attached to a part of a human body, comprising: a sensor for detecting a pulse signal of a user at predetermined time intervals, an AD converter for converting the detected pulse signal into a digital signal, and calculating a pulse rate from the digital signal, And a microprocessor configured to determine whether a rate of change of the digital signal is within a first predetermined range, and to display data indicating an exercise situation according to the determination result.

The pulse rate calculating method and the portable pulse measuring device according to the present invention directly determine whether the user is exercising or not according to a predetermined criterion within the pulse measuring device, and calculates and displays the pulse rate only when the user is not exercising or the user If you are exercising, you can increase the reliability of the calculated pulse rate by displaying the data on the status of the exercise together with the pulse rate, and the emergency signal is generated only when the pulse rate is out of the predetermined range when the user is in a normal state. It is possible to prevent the action to be taken, thereby increasing the reliability of the system.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related well-known configuration or function may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a diagram illustrating user pulse data in a state that does not include an exercise section.

Referring to FIG. 1, pulse data measured when a user wearing a portable pulse measuring device is not exercising is shown. The pulse data is pulse data obtained by digitizing a pulse signal obtained from a user through a sampling and quantization process. The pulse data is a continuous waveform having a constant period and amplitude as a whole. Therefore, the pulse rate calculated from the pulse data has a very accurate value.

2 is a diagram illustrating user pulse data in a state including an exercise section of a predetermined range or less.

Referring to FIG. 2, pulse data measured while a user wearing a portable pulse measuring device is exercising with an exercise amount of 30% or less is shown. The pulse data are mostly continuous waveforms having a constant period and amplitude, but in some intervals, the period and amplitude are slightly out of the normal range. Therefore, the pulse rate calculated from the pulse data has a relatively accurate value.

3 is a diagram illustrating user pulse data in a state including an exercise section of a predetermined range or more.

Referring to FIG. 3, pulse data measured when a user wearing a portable pulse measuring device is exercising with an exercise amount of 30% or more is shown. The pulse data is a continuous waveform with an irregular period and amplitude as a whole when comparing before and after exercise. Therefore, the pulse rate calculated from the pulse data has a very inaccurate value.

Figure 4 is a block diagram showing a portable pulse measuring device according to an embodiment of the present invention.

Referring to FIG. 4, the portable pulse measuring apparatus 400 according to the present invention includes a sensor 410, a filter 420, an amplifier 430, an analog-to-digital converter 440, a microprocessor 450, and a transmitter ( 460, time meter 470, screen indicator 480, and memory 490. Hereinafter, these components will be described in detail.

The sensor 410 is attached directly to a part of the user's body (for example, the wrist) or through a medium (for example, an elastic member), and detects vibration of a pulse generated by blood flowing through the user's artery. Then, this is converted into an electrical signal and output. The sensor 410 may be an optical sensor or a pressure sensor, and may be set to detect a pulse for a predetermined time (for example, 3 seconds) every predetermined time (for example, 1 minute).

The filter 420 removes noise included in a pulse signal input from the sensor 410 and may be configured as a band pass filter. However, the noise is due to the inherent characteristics of the pulse measuring apparatus. The amplifier 430 amplifies and outputs a pulse signal input from the filter 420. The analog-digital converter 440 converts the pulse signal input from the amplifier 430 into a digital signal through sampling and quantization and outputs the pulse signal.

1. First embodiment of the microprocessor 450

The microprocessor 450 determines whether the user is currently exercising through analysis of the pulse data input from the analog-digital converter 440, and if the user is not exercising, the microprocessor 450 adjusts the pulse rate based on the input pulse data. It is calculated and displayed on the screen display 480, and an emergency signal is generated when the calculated pulse rate is out of a predetermined range. On the other hand, if the exercise results from the determination, the current exercise status is displayed through the screen display 480 without calculating the pulse rate.

In detail, when the rate of change of pulse data input from the analog-digital converter 440 is out of a predetermined range, the microprocessor 450 determines that an accurate pulse rate cannot be calculated because the user is currently exercising. Therefore, without performing the operation of calculating the pulse rate from the input pulse data, and displays the character of the exercise with the current time without displaying the calculated pulse rate on the screen display 480.

On the other hand, if the rate of change of the pulse data input from the analog-digital converter 440 does not deviate from a predetermined range, the microprocessor 450 determines that the current pulse rate can be calculated since the user is not exercising. Therefore, the operation of calculating the pulse rate from the input pulse data is performed, and the displayed pulse rate and the current time are displayed together on the screen display 480.

In addition, the microprocessor 450 determines whether the calculated pulse rate is out of a predetermined range (for example, 40 to 180), and if the result is out of the predetermined range, outputs a control signal to the transmitter 460 to transmit the transmitter 460. ) To send an emergency signal. Meanwhile, the pulse rate calculated by the microprocessor 460 may be stored in the memory 490 for a predetermined time together with the time obtained from the time meter 470.

The emergency signal transmitted from the transmitter 460 is received by a hospital or an emergency center, and appropriate first aid may be made by a medical staff. The time measuring device 470 is a device for measuring time continuously. The screen display 480 is a device for displaying a pulse rate, a current time, a current state, and an emergency situation. The memory 490 is a screen display 480. The device displays the information displayed on the screen for a predetermined time.

2. Second Embodiment of Microprocessor 450

The microprocessor 450 determines whether the user is currently exercising through analysis of the pulse data input from the analog-digital converter 440, and calculates a pulse rate based on the input pulse data when the user is exercising. And displayed on the screen display 480 together with the character during exercise, even if the calculated pulse rate is out of the predetermined range does not generate an emergency signal. On the other hand, if the exercise is not determined, the same operation as described in the embodiment is performed.

In detail, when the rate of change of pulse data input from the analog-digital converter 440 is out of a predetermined range, the microprocessor 450 determines that an accurate pulse rate cannot be calculated because the user is currently exercising. However, unlike one embodiment, the operation to calculate the pulse rate from the input pulse data, and displays the current time and the character in motion with the pulse rate calculated on the screen display 480.

On the other hand, when the rate of change of the pulse data input from the analog-digital converter 440 does not deviate from a predetermined range, the microprocessor 450 determines that the correct pulse rate can be calculated because the user is not currently exercising. Therefore, the operation of calculating the pulse rate from the pulse data is performed as in the case of exercise, and the pulse rate calculated on the screen display 480 is displayed together with the current time.

In addition, the microprocessor 450 determines whether the calculated pulse rate is out of a predetermined range (for example, 40 to 180), and when the result is out of the predetermined range, the transmitter 460 when the user is not exercising. The control signal is output to the transmitter 460 to control the transmission of the emergency signal. However, when the user is exercising, the microprocessor 450 may not perform an operation of determining whether the calculated pulse rate is out of a predetermined range.

5 is a block diagram illustrating a microprocessor according to an example embodiment.

Referring to FIG. 5, the microprocessor 500 according to the present invention includes a first measuring unit 510, a second measuring unit 520, a first comparator 530, a controller 540, a pulse rate calculator 550, and And a second comparator 560. Hereinafter, these components will be described in detail.

The first measuring unit 510 receives pulse data and measures an amplitude change rate from the input pulse data. The rate of change in amplitude represents the rate of change in voltage magnitude between successive ridges and valleys. That is, the relative difference between the minimum voltage and the maximum voltage is shown. As described above, a small amplitude change rate is shown in a situation where the user is not exercising, but a large amplitude change rate is shown in a situation where the user is exercising.

The second measuring device 520 receives pulse data, and measures the wavelength change rate from the input pulse data. The rate of change of wavelength represents the rate of change of wave travel distance between successive valleys and valleys or between floors and floors. That is, the relative difference between the minimum distance and the maximum distance is shown. As described above, a small wavelength change rate is displayed in a situation where the user is not exercising, but a large wavelength change rate is shown in a situation where the user is exercising.

The first comparator 530 receives an amplitude change rate and a wavelength change rate from the first measuring unit 510 and the second measuring unit 520, and the input amplitude change rate and the wavelength change rate are respectively the first predetermined range and the second predetermined range. Determine if you are out of. As a result of the determination, the first logic signal is output when the at least one rate of change deviates from the corresponding predetermined range, and the second logic signal is output when both rate of change does not deviate from the predetermined range.

The controller 540 receives a logic signal from the first comparator 530, outputs a control signal for preventing the pulse rate calculator 550 from executing when the input logic signal is the first logic signal, and outputs the logic signal. If the signal is the second logic signal, a control signal for causing the pulse rate calculator 550 to be output is output. The controller 540 outputs the control signal and outputs data indicating that the user is exercising while displaying the control signal to the screen display 480.

The pulse rate calculator 550 receives pulse data and calculates and outputs a pulse rate from the input pulse data according to a control signal output from the controller 540. The pulse rate calculation is calculated by calculating the period between each floor and the floor or the valley and the valley constituting the pulse data, calculating the average value of the calculated periods, and then taking the inverse of the calculated average value. This is a well known method.

The second comparator 560 receives the pulse rate from the pulse rate calculator 550 and determines whether the input pulse rate is outside the third predetermined range. It is preferable that the said 3rd predetermined range is 40-180 which shows the dangerous limit of a pulse rate. As a result of the determination, the controller 540 outputs a first logic signal indicating a danger to the controller 540 when it is out of the third predetermined range, and outputs a second logic signal indicating normal when the controller 540 does not deviate from the third predetermined range.

The controller 540 receives the logic signal from the second comparator 560, and when the input logic signal is the first logic signal, transmits an emergency signal through the transmitter 460 shown in FIG. 4, and When the input logic signal is the second logic signal, a control signal for storing the pulse rate calculated by the pulse rate calculator 550 in the memory 490 is output. That is, the controller 540 calculates the pulse rate only when the reliability of the pulse rate can be secured and transmits an emergency signal.

6 is a block diagram illustrating a microprocessor according to another exemplary embodiment.

The first measuring unit 610 receives pulse data, measures an amplitude change rate from the input pulse data, and outputs the measured rate of change of amplitude. As described above, the amplitude change rate may vary depending on whether the user is exercising. The second measuring device 620 receives pulse data, measures a wavelength change rate from the input pulse data, and outputs the measured rate of change of wavelength. As described above, the wavelength change rate may vary depending on whether the user is exercising.

The first comparator 630 receives an amplitude change rate from the first measurer 610, determines which of the plurality of thresholds the input amplitude change rate reaches, and outputs a logic signal corresponding thereto. Here, each threshold is a numerical value corresponding to the amount of exercise. The first comparator 630 calculates the exercise amount as 15% when the amplitude change rate reaches the first threshold value, and calculates the exercise amount as 30% when the amplitude change rate reaches the second threshold value so that the corresponding logic signal (eg, For example, 2 bits).

On the other hand, the first comparator 630, in order to ensure the accuracy of the momentum determination, receives a rate of change of wavelength from the second measuring unit 620, and determines which of the plurality of thresholds the input wavelength change rate reaches It is determined whether the logic signal corresponding thereto and the logic signal corresponding to the exercise amount calculated from the amplitude change rate are the same. If it is not the same, a logic signal corresponding to the average of the calculated amount of exercise is output.

The pulse rate calculator 650 receives pulse data, calculates and outputs a pulse rate from the input pulse data. In particular, the pulse rate calculator 650 is not controlled by the controller 540. The second comparator 660 receives the pulse rate from the pulse rate calculator 550 and determines whether the input pulse rate is outside the first predetermined range. As a result of the determination, when it is out of the third predetermined range, the controller 640 outputs a first logic signal informing of danger.

On the other hand, when the pulse rate calculator 650 outputs the pulse rate to the screen display 480, the controller 640 outputs data indicating the amount of exercise input from the comparator 630 to the screen display 480. In addition, when a first logic signal indicating a danger is output from the second comparator 660, the controller 640 transmits an emergency signal through the transmitter 460 only when the exercise amount of the user does not exceed a predetermined value. . That is, the controller 640 transmits an emergency signal only when the reliability of the pulse rate can be secured.

7 is a detailed flowchart illustrating a pulse rate calculation method according to an embodiment of the present invention.

The pulse signal is sensed using a pulse detection sensor and converted into an electrical signal and output (710). The noise included in the output electrical signal is removed and the noise is removed and amplified (720). The amplified electrical signal is converted into digital pulse data through sampling and quantization (730). The amplitude change rate and / or wavelength change rate of the signal constituting the pulse data is measured (740).

It is determined whether the measured amplitude change rate and / or wavelength change rate are within the first range (750). As a result of the determination, if it is not within the first range, it is determined that the user is exercising and does not calculate the pulse rate from the pulse data, and only displays the exercise state through the display unit (760). As a result of the determination, if it is within the first range, it is determined that the user is not exercising, the pulse rate is calculated from the pulse data and the calculated pulse rate is displayed through the display unit (770, 780).

The pulse rate calculation method according to the present invention does not calculate the pulse rate from all the pulse data obtained as in the prior art and displays it on the display unit, but determines whether the user is exercising and calculates the pulse rate only when the user is not exercising. By displaying through the display unit, it is possible to prevent the incorrect pulse rate from being calculated and provided to the user.

8 is a detailed flowchart illustrating a pulse rate calculation method according to another exemplary embodiment of the present invention.

A pulse signal is detected using a pulse detection sensor, and the pulse signal is converted into an electrical signal and output. The noise included in the output electrical signal is removed and amplified electrical signal from which the noise is removed (820). The amplified electrical signal is converted into digital pulse data through a sampling and quantization process (830). The pulse rate is calculated from the pulse data and the calculated pulse rate is displayed through the display unit (840, 850).

The amplitude change rate or / and wavelength change rate of the signal constituting the pulse data is measured (860), and it is determined whether the measured amplitude change rate or / and wavelength change rate is within the first range (870). As a result of the determination, if it does not exist within the first range, it is determined that the user is exercising and the exercise state is displayed through the display unit (880). As a result of the determination, if it is within the first range, it is determined that the user is not exercising and no special display is performed on the display unit.

The pulse rate calculation method according to the present invention does not calculate the pulse rate from all the pulse data obtained as in the prior art and display it through the display unit, but determines whether the user is exercising, and with the calculated pulse rate when the user is exercising. By displaying the letters indicating that the user is exercising, an incorrect pulse rate can be calculated and prevented from being provided to the user.

9 is a detailed flowchart illustrating a method for generating an emergency signal according to an embodiment of the present invention.

A pulse signal is detected using a pulse detection sensor, and the pulse signal is converted into an electrical signal and output (operation 910). The noise included in the output electrical signal is removed and the noise is removed and amplified (920). The amplified electrical signal is converted into digital pulse data through a sampling and quantization process (930). The amplitude change rate or the wavelength change rate of the signal constituting the pulse data is measured (940).

It is determined whether the measured amplitude change rate or wavelength change rate is within the first range (950). As a result of the determination, if it is not within the first range, it is determined that the user is exercising and the exercise state is displayed through the display unit (960). As a result of the determination, if it is within the first range, the pulse rate is calculated from the pulse data, and the calculated pulse rate is displayed through the display unit (970,980). It is determined whether the calculated pulse rate falls within the second range (990). As a result of the determination, if it does not belong to the second range, an emergency signal is generated (995).

In the emergency signal generation method according to the present invention, the pulse rate is calculated from all the pulse data obtained as in the prior art, and it is not determined whether the emergency signal is generated according to the calculated pulse rate, but determines whether the user is exercising. By calculating the pulse rate only when the user is not exercising, and generating an emergency signal only when the calculated pulse rate is abnormal, it is possible to prevent an incorrect emergency signal from occurring.

10 is a detailed flowchart illustrating a method for generating an emergency signal according to another embodiment of the present invention.

A pulse signal is detected using a pulse detection sensor, and the pulse signal is converted into an electrical signal and outputted (1010). The noise included in the output electrical signal is removed and the noise is removed and amplified (1020). The amplified electrical signal is converted into digital pulse data through a sampling and quantization process (1030). The pulse rate is calculated from the pulse data and the calculated pulse rate is displayed through the display unit (1040, 1050).

The amplitude change rate or / and wavelength change rate of the signal constituting the pulse data is measured (860), and it is determined whether the measured amplitude change rate or / and wavelength change rate is within the first range (870). As a result of the determination, if it does not exist within the first range, it is determined that the user is exercising and the exercise state is displayed through the display unit (880). As a result of the determination, when present within the first range, it is determined whether the calculated pulse rate exists within the second range (1090). As a result of the determination, if it does not exist within the second range, an emergency signal is generated (1095).

In the emergency signal generation method according to the present invention, the pulse rate is calculated from all the pulse data obtained as in the prior art, and it is not determined whether the emergency signal is generated according to the calculated pulse rate, but determines whether the user is exercising. In addition, when the user is in operation, even if the calculated pulse rate is abnormal by not generating an emergency signal, it is possible to prevent the occurrence of an incorrect emergency signal.

The best embodiment has been disclosed in the drawings and specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims.

Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a diagram showing user pulse data in a normal state.

2 is a diagram illustrating user pulse data in a state including an exercise section of a predetermined range or less.

3 is a diagram illustrating user pulse data in a state including an exercise section of a predetermined range or more.

Figure 4 is a block diagram showing a portable pulse measuring device according to an embodiment of the present invention.

5 is a block diagram illustrating a microprocessor according to an example embodiment.

6 is a block diagram illustrating a microprocessor according to another exemplary embodiment.

7 is a detailed flowchart illustrating a pulse rate calculation method according to an embodiment of the present invention.

8 is a detailed flowchart illustrating a pulse rate calculation method according to another exemplary embodiment of the present invention.

9 is a detailed flowchart illustrating a method for generating an emergency signal according to an embodiment of the present invention.

10 is a detailed flowchart illustrating a method for generating an emergency signal according to another embodiment of the present invention.

Claims (13)

In the method for calculating the pulse rate by detecting a pulse signal from the human body, Converting a pulse signal obtained from a user into a digital signal; Determining whether a rate of change of the digital signal is within a first predetermined range; Calculating a pulse rate from the digital signal according to the determination result; And Pulse rate calculation method comprising the step of displaying the calculated pulse rate. The method of claim 1, wherein determining whether the first predetermined range is within the first range, And determining whether the amplitude change rate of the digital signal is within the first predetermined range. The method of claim 1, wherein determining whether the first predetermined range is within the first range, And determining whether the rate of change of the wavelength of the digital signal is within the first predetermined range. The method of claim 1, wherein the calculating of the pulse rate comprises: And if the rate of change of the digital signal is not within the first predetermined range, calculating the pulse rate. According to claim 1, The pulse rate calculation method, Determining whether the calculated pulse rate is within a second predetermined range; And Pulse rate calculation method further comprising the step of generating an emergency signal according to the determination result. In the method for calculating the pulse rate by detecting a pulse signal from the human body, Converting a pulse signal obtained from a user into a digital signal; Calculating and displaying a pulse rate from the digital signal; Determining whether a rate of change of the digital signal is within a first predetermined range; And And displaying data indicating the exercise condition according to the determination result. According to claim 6, The pulse rate calculation method, And if the rate of change of the digital signal is not within the first predetermined range, displaying data indicating the exercise condition. According to claim 6, The pulse rate calculation method, Determining whether the calculated pulse rate is within a second predetermined range; And Pulse rate calculation method further comprising the step of generating an emergency signal according to the determination result. In a portable pulse measuring device attached to a part of a human body, A sensor for detecting a pulse signal of a user at predetermined time intervals; An AD converter for converting the sensed pulse signal into a digital signal; And And a microprocessor that determines whether the rate of change of the digital signal is within a first predetermined range, calculates a pulse rate from the digital signal according to the determination result, and displays the calculated pulse rate. Measuring device. The method of claim 9, wherein the microprocessor, A first measuring unit measuring an amplitude change rate of the digital signal; A second measuring device measuring a rate of change of wavelength of the digital signal; And A first comparator that determines whether the rate of change of amplitude or the rate of change of wavelength is within the first predetermined range, and outputs a first logic signal according to the determination result; A controller for generating a first control signal according to the first logic signal; And And a pulse rate calculator for calculating a pulse rate from the digital signal in response to the first control signal. The method of claim 9, wherein the microprocessor, And a second comparator for determining whether the calculated pulse rate is within a second predetermined range and outputting a second logic signal according to the determination result. And the controller generates an emergency signal in response to the second logic signal. 10. The method of claim 9, The portable pulse measuring device, A time meter for measuring a current time; A memory for storing a current time together with the calculated pulse rate; And And a screen indicator for displaying the current time together with the calculated pulse rate. A portable pulse measuring device attached to a part of a human body, A sensor for detecting a pulse signal of a user at predetermined time intervals; An AD converter for converting the sensed pulse signal into a digital signal; And And a microprocessor configured to calculate a pulse rate from the digital signal, determine whether a rate of change of the digital signal is within a first predetermined range, and control to display data indicating an exercise condition according to the determination result. Pulse measuring device.

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