JPH05161615A - Device and method for measuring heartbeat rate - Google Patents

Abstract

PURPOSE:To provide the method and device for measuring heartbeat rate so as to measure the heartbeat of a reagent under exercise from measured pulses while fitting a photointerrupter to the forehead of the reagent especially concerning the device and method for measuring heartbeat for measuring heartbeat under exercise. CONSTITUTION:A sensor part equipped with a light emitting element 21 and a light receiving element 22 is mounted to the forehead of the reagent, and a pulse frequency detecting means 2 measures the pulse frequency of the reagent. Further, a vibration detecting means 3 measures the vibrations of the vertical action of the reagent, and an operation processing means 5 calculates an average pulse frequency from the measured pulse frequency and calculates the heartbeat of the reagent from these values by using a prescribed calculating formula.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heart rate measuring apparatus and method for measuring heart rate during exercise, and more particularly,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heart rate measuring device and a measuring method capable of mounting a photo interrupter on a forehead of a person to be measured and measuring the heart rate of the person being exercised from the measured pulse rate.

[0002]

2. Description of the Related Art In recent years, people of all ages have become more and more interested in their own health, and the number of people participating in jogging, athletic clubs, sports centers and the like is increasing. However, the number of seizures and deaths due to excessive exercise is increasing, and in particular, the accidents of old people and children and the adverse effects of excessive dieting have become social problems. In order to prevent these accidents, it is necessary to measure the heart rate during exercise and, when a certain heart rate is exceeded, prompt a warning or the like and stop the exercise.

At present, there are methods for measuring the heart rate that utilize a pressure sensor or a sound sensor. The one using a pressure sensor is, for example, one that measures vibration due to pulsation of an artery, and one that obtains a pulse wave signal by detecting the pressure inside the cuff with the pressure sensor. The one using the sound sensor is, for example, one that detects the Korotkoff sound by the sound sensor and calculates the heart rate.

[0004]

However, in the case of using the above-mentioned pressure sensor, a pump for pressurizing the cuff (pressurized air bag) is required, the weight increases, and it is difficult to supply power. There is a problem that it is not suitable for measuring the heart rate during exercise.

Further, a sound sensor is required to take measures against noise other than Korotkoff sound, and cannot be practically used for heart rate measurement during exercise in which noise due to external impact increases. There was a problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above problems, and a sensor unit including a light emitting element and a light receiving element is attached to a part of a human body to measure the pulse rate of a person to be measured. Pulse rate detecting means for measuring, vibration detecting means for measuring vibration such as vertical movement of the measurement subject, based on the pulse rate detecting means and the detection signal of the vibration detection means, the heartbeat of the measurement subject. And a processing unit for calculating a number.

Further, according to the present invention, a sensor unit having a light emitting element and a light receiving element is attached to the forehead of the person to be measured, and the pulse rate detecting means for measuring the pulse rate of the person to be measured, and the person to be measured. Vibration detecting means for measuring vibrations such as vertical movements, first calculation processing means for calculating an average pulse rate from a detection signal of the pulse rate detecting means, and the number of vibrations by the vibration detecting means. Based on the calculation result of the first calculation processing means,

Heart rate = Average pulse rate− (K × number of vibrations) (K = constant)

And a second arithmetic processing means for arithmetically calculating the heart rate of the person to be measured.

Further, the heart rate measuring method comprises a first step of measuring the pulse rate of the subject, a second step of calculating an average pulse rate based on the pulse rate measured in the first step, and a measured rate. Based on a third step of measuring vibration such as vertical movement of a person, an average pulse rate calculated in the second step, and the number of vibrations measured in the third step,

Heart rate = Average pulse rate− (K × number of vibrations) (K = constant)

And a fourth step of calculating the heart rate of the subject.

[0013]

According to the present invention constructed as described above, the sensor section having the light emitting element and the light receiving element is mounted on the forehead of the subject, and the pulse rate detecting means measures the pulse rate of the subject. Further, the vibration detecting means measures vibration such as vertical movement of the person to be measured. Then, the first arithmetic processing means calculates the average pulse rate from the detection signal of the pulse rate detecting means, and the second arithmetic processing means uses the number of vibrations by the vibration detecting means and the arithmetic result of the first arithmetic processing means. Based on

Heart rate = Average pulse rate− (K × number of vibrations) (K = constant)

Is calculated to calculate the heart rate of the person to be measured.

In the present invention, the pulse rate of the subject is measured in the first step, the average pulse rate is calculated in the second step based on the pulse rate measured in the first step, and in the third step,
Vibrations such as vertical movements of the measurement subject are measured, and in the fourth step, the heart rate of the measurement subject is based on the average pulse rate calculated in the second step and the number of vibrations measured in the third step. Is calculated.

[0017]

Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the heart rate measuring apparatus 1 of this embodiment includes a pulse rate detecting means 2, a vibration detecting means 3, a first arithmetic processing means 4, and a second arithmetic processing means 5. The display means 6 and the alarm 7 are included.

The pulse rate detecting means 2 comprises a light emitting diode 21.
And a phototransistor 22 are included in the sensor section 2a for measuring the pulse of the subject. The light emitting diode 21 corresponds to a light emitting element,
It is for irradiating a part of the human body with light. The phototransistor 22 corresponds to a light receiving element, and the light emitting diode 21 and the phototransistor 22 form a photointerrupter. That is, the pulse rate detecting means 2
Light is emitted from the light emitting diode 21 to a part of the human body, and the emitted light is received by the phototransistor 22, whereby the change in the volume of the blood vessel is detected and the pulse rate is measured. That is, when the skin is lightly pressed, the blood vessels under the skin are pushed out to the surroundings and the skin becomes white, but when blood flow is generated by pulsation, blood flows into the blood vessels and the skin returns to a red state. The pulse rate is measured by detecting this change in reflectance. Therefore, the measurement position of the human body is preferably the thin skin portion, and more preferably the end portion of the fingertip, the earlobe, or the forehead. In this embodiment, the pulse rate is detected at the forehead of the person to be measured. The measurement at the forehead portion has an effect that it is less susceptible to external influences such as movement and vibration, as compared with the end portions such as fingertips and ear lobes.

The light emitting element and the light receiving element of the pulse rate detecting means 2 are a light emitting diode 21 and a phototransistor 22.
However, any light emitting element and light receiving element can be used.

The vibration detecting means 3 is for detecting the number of steps, the number of jumps, etc., and is for measuring the vibration such as vertical movement of the person to be measured. An appropriate accelerometer can be used for the sensor unit that detects this vibration, but a pedometer mechanism that is generally used can also be used. The pedometer mechanism may be of a type in which a contact is composed of a spring and a weight and vibration is measured by this contact.

The first arithmetic processing means 4 is for accumulating the pulse rates detected by the pulse rate detecting means 2 to calculate an average pulse rate. Since the measured pulse rate changes with time, the first calculation processing means 4 is for calculating the average pulse rate within the measurement time. Even if the measurement time is changed, the average pulse rate within the measurement time can be calculated.

The second arithmetic processing means 5 is a vibration detecting means 3
This is for calculating the heart rate of the person to be measured based on the number of vibrations by and the calculation result of the first calculation processing means 4.

Here, the relationship between the average pulse rate and the heart rate will be described in detail. Table 1 is for measuring the pulse during walking (measurement time 60 seconds), Table 2 is for measuring the pulse during running (measurement time 60 seconds), and Table 3 is for measuring the pulse during jumping. What you did (measurement time 60 seconds, number of jumps 3
(0 times), Table 4 is for measuring the pulse at the time of jump (measurement time 60 seconds, number of jumps is 120 times), and Table 5 is for measuring the pulse at bench press (measurement time 30 seconds).

From Tables 1 to 5, the pulse rate other than during the bench press is higher than the heart rate. It is considered that this is because the blood in the forehead was disturbed by the vibration. That is, it is considered that the vibration causes the pulse rate detecting means 2 to be loosely attached, or the blood inertial force due to the vibration causes blood flow between the pulse and the next pulse. Therefore, assuming that the pulse rate immediately after exercise is equal to the heart rate, the correlation between the average pulse rate and the number of vibrations (step number, jump number) is as follows.

Heart rate ≈ average pulse rate- (K x number of vibrations) (K = constant) (Equation 1)

Here, K is an experimental constant, and a value around 0.2 is obtained from the measured data. (Up to 0.25,
(The minimum is 0.174.) This correction coefficient uses the heart rate at rest immediately after exercise is stopped as an approximate value of the heart rate during exercise, and is calculated back by the measured pulse rate and the number of vibrations. Seeking

Therefore, the second arithmetic processing means 5 can calculate the heart rate by calculating the expression 1.

Appropriate microcomputers can be used for the first arithmetic processing means 4 and the second arithmetic processing means 5, and further, the first arithmetic processing means 4 and the second arithmetic processing means 5 are used. Can also be configured to be operated by one common microcomputer.

The pulse rate detecting means 2 and the vibration detecting means 3 are also provided.
Is a light emitting element, a light emitting element, a vibrometer such as an accelerometer,
It may be necessary to connect various signal processing systems. In this case, the first arithmetic processing means 4 and the second arithmetic processing means 5 can be configured to include a signal processing system.

The display means 6 is a liquid crystal display device for displaying the heart rate during exercise. The display unit 6 is not limited to the liquid crystal display device, and any display element can be used as long as it can display the heart rate.

The alarm 7 gives an alarm and prompts the subject to stop the exercise when the calculation result of the second calculation processing means 5 exceeds a certain value. When the alarm sounds, the person to be measured needs to immediately stop the exercise, and the early stop of the exercise prevents a heart attack or the like. It should be noted that since a certain heart rate that gives an alarm varies from person to person, it can be input using an upper limit heart rate setting button or the like.

Next, the optimum usage of this embodiment will be described with reference to FIG. FIG. 2 shows a case where the heart rate is measured during jogging. In this embodiment, the headband 2
No. 0 is made of elastic pile fabric, and the sensor portion 2a is configured to come into contact with the forehead of the person to be measured. The sensor portion 2a is fixed by a sensor pressing member 23. Further, the main body portion 10 is formed on the headband 20, the vibration detecting means 3, a microcomputer corresponding to the first arithmetic processing means 4 and the second arithmetic processing means 5, a display means 6, an alarm 7, The power supply etc. are stored.

The sensor portion 2a and the main body portion 10 can be not only incorporated in the headband 20 but also stored in a hat or the like.

Further, the main body portion 10 and the sensor portion 2a of the pulse rate detecting means 2 may be separated from each other.
That is, the sensor unit 2a is incorporated in the headband 20, etc., and the vibration detection unit 3, the microcomputer corresponding to the first arithmetic processing unit 4 and the second arithmetic processing unit 5, and the display unit are provided in the main body unit 10. 6, the alarm 7, the power supply unit and the like can be housed, and the main body unit 10 can be fixed to the waist or the like of the user by an appropriate method.

In the modified example in which the sensor portion 2a is separated as described above, not only the sensor portion 2a is light in weight and the usability of the person to be measured is excellent, but also the influence of the vibration of the main body portion 10 is minimized. It has the outstanding effect of being able to

[0037]

According to the present invention configured as described above, a pulse rate detecting means for measuring a pulse rate of a person to be measured, by mounting a sensor section having a light emitting element and a light receiving element on a part of a human body, Vibration detection means for measuring vibrations of the person to be measured, such as vertical movements, calculation processing means for calculating the heart rate of the person to be measured based on the pulse rate detection means and the detection signals of the vibration detection means. Therefore, there is little effect of vibration and the like due to the motion of the person to be measured, and there is an effect that the heart rate can be measured with high accuracy. Particularly, since the pulse rate detecting means detects a local blood flow change, there is an effect that it is extremely unlikely to be affected by an external impact or the like.

Further, according to the present invention, the sensor unit of the pulse rate detecting means is attached to the forehead of the person to be measured, and the first arithmetic processing means calculates the average pulse rate from the detection signal of the pulse rate detecting means. Since it is configured, there is an effect that even if the user wears the sensor unit, there is no discomfort, and the heart rate can be measured with high accuracy.

The heart rate measuring method can reliably measure the heart rate even during exercise, and when the heart rate becomes higher than a certain value, an alarm or the like can be issued.
It has the outstanding effect of being able to prevent accidents such as seizures due to excessive exercise.

[0040]

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a perspective view showing a usage state of the present embodiment.

[Explanation of symbols]

 1 heart rate measuring device 2 pulse rate detecting means 21 light emitting diode 22 phototransistor 3 vibration detecting means 4 first arithmetic processing means 5 second arithmetic processing means 6 display means 7 alarm

Claims (3)

[Claims] 1. A pulse rate detecting means for measuring a pulse rate of a measurement subject by mounting a sensor section having a light emitting element and a light receiving element on a part of a human body, and a vertical movement of the measurement subject. A heartbeat characterized by comprising a vibration detecting means for measuring vibration, a pulse rate detecting means, and an arithmetic processing means for calculating the heart rate of the person to be measured based on the detection signal of the vibration detecting means. Number measuring device. 2. A pulse rate detecting means for measuring the pulse rate of the subject by mounting a sensor unit having a light emitting element and a light receiving element on the forehead of the subject, and the vertical movement of the subject. Etc., a vibration detecting means for measuring the vibration, a first arithmetic processing means for calculating an average pulse rate from a detection signal of the pulse rate detecting means, a vibration number by the vibration detecting means and the first Second calculation processing means for calculating the heart rate of the measurement subject by calculating heart rate = average pulse rate− (K × number of vibrations) (K = constant) based on the calculation result of the calculation processing means A heart rate measuring device comprising: 3. A first step of measuring the pulse rate of the measurement subject, a second step of calculating an average pulse rate based on the pulse rate measured in the first step, and a vertical movement of the measurement subject, etc. Based on the average pulse rate calculated in the second step and the number of vibrations measured in the third step, heart rate = average pulse rate- (K x vibration Number) (K = constant) to calculate the heart rate of the measurement subject.