JP3800004B2 - EMG measurement device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a myoelectric potential measuring device that measures the amount of muscle discharge during exercise of a human body and displays the degree of muscle use during exercise.
[0002]
[Prior art]
In the medical field, there is an electromyogram inspection apparatus for measuring and evaluating myoelectric potential using a needle electrode or a surface electrode in order to inspect a muscle use state of a human body (user). In addition, myoelectric potential is measured as biometric information of the human body (user), and myoelectric signals are used to control robots, control prosthetic hands / legs, or use as input means instead of computer keyboards. Some have been proposed to control the controlled object.
[0003]
Specifically, as described in Japanese Patent Application Laid-Open No. 8-229015, an electrode is attached to the skin surface of a human body (user) and an instantaneous value of the myoelectric potential is measured as a method for measuring the myoelectric potential. A myoelectric potential feedback device has been proposed that outputs (displays) analog data after amplification of detected myoelectric potentials as it is, or sets an absolute threshold value and compares (outputs) this threshold value with the analog data. ing.
[0004]
[Problems to be solved by the invention]
However, in the configuration described in JP-A-8-229015, the measured value of the myoelectric potential obtained from the human body (user) uses the instantaneous value of the myoelectric potential detected from the skin surface, and the noise There was a problem that it was easy to be affected. Also, the myoelectric potential waveform vibrates, and there is a problem in that the amplitude is not constant even when a force is similarly applied.
[0005]
In addition, the information to be output (displayed) uses analog data after amplification of the detected myoelectric potential as it is, or uses an absolute threshold value and compares this threshold value with the analog data. Although it is possible to grasp the use state of the muscle by the myoelectric potential, there is a problem that it is difficult to grasp how much force it is for the human body (user). For example, even if the same load is applied, the myoelectric potential differs between a strong human body (user) and a weak human body (user), that is, a weak human body (user) has a strong muscle strength (user). In comparison with), it is necessary to exert more force for the same load, and the muscle discharge position is large. Therefore, depending on the setting of the threshold, it is difficult to give an exercise load according to the level of muscle strength of the human body (user), and the human body (user) may be overloaded. is there.
[0006]
The present invention has been made in view of the above problems, and an object thereof is to provide a myoelectric potential measuring apparatus that presents information according to the level of a human body (user).
[0007]
[Means for Solving the Problems]
The myoelectric potential measuring device according to claim 1 is provided with at least one pair of electrodes provided so as to be in contact with the surface of the human body (user) 10, and detects a myoelectric potential generated in the human body (user) 10. In the myoelectric potential measuring device comprising: an amplifying unit 3 having a function of amplifying and rectifying myoelectric potential during exercise to obtain an absolute value; and integrating the absolute value at a predetermined time interval T1 A function of calculating the integral value as the amount of muscle discharge, and a function of repeating the integration for each predetermined time interval T1 over a predetermined time T2, and calculating the maximum value among the integral values as the maximum amount of muscle discharge. Presenting to the human body (user) 10 the integration unit 4 provided, the comparison unit 5 having a function of comparing the ratio of the muscle discharge during exercise and the maximum muscle discharge. And a display unit 7 having a function to perform In addition, the maximum muscle discharge amount is compared with the muscle discharge amount during exercise, and the ratio is presented to the human body.
[0008]
Further, in the electromyogram measuring apparatus according to claim 2, in the invention according to claim 1, the integration unit 4 repeats the integration every predetermined time interval T1 over a predetermined time T2, and each integration value thereof. The maximum value among them is defined as the maximum muscle discharge amount.
[0009]
The myoelectric potential measuring device according to claim 3 is the invention according to claim 1 or claim 2, wherein the display unit 7 calculates a ratio between the amount of myoelectric discharge during the exercise and the maximum amount of myoelectric discharge. It has a function of presenting at least one of auditory information and visual information.
[0010]
The myoelectric potential measuring device according to claim 4 is the memory unit according to any one of claims 1 to 3, wherein the comparison unit 5 stores the maximum myoelectric discharge amount. 6.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a block diagram of a myoelectric potential measuring apparatus according to a first embodiment of the present invention, FIG. 2 is a waveform diagram showing myoelectric potential, and FIG. 3 is an external view of a panel portion of the myoelectric potential measuring apparatus. It is.
[0012]
First, as shown in FIG. 1, the myoelectric potential measuring device includes an electrode 1 and an electrode 2, an amplification unit 3, an integration unit 4, a comparison unit 5, a memory unit 6, and a display unit 7. It is configured. As shown in FIG. 3, the package 13 includes an amplification unit 3, an integration unit 4, a comparison unit 5, a memory unit 6, and a display unit 7.
[0013]
As shown in FIG. 3, reference numeral 10 denotes a human body (user), and the electrodes 1 and 2 are arranged so as to be in contact with a portion of the human body (user) 10 to exercise and train, and the electrodes 1 and 2 are It has a function of detecting myoelectric potential generated in the human body (user) 10. In the first embodiment, the electrode 1 and the electrode 2 are arranged on the arm portion of the human body (user) 10, but the arrangement position of the electrode 1 and the electrode 2 is not limited to this place. Moreover, you may provide a ground electrode (not shown) in the human body (user) 10 as needed. Of course, the electrode 1 and the electrode 2 may be disposed on the inner surface of a belt (not shown) so as to contact the human body (user) 10.
[0014]
The amplifying unit 3 has a function of amplifying the myoelectric potential detected by the electrodes 1 and 2 and rectifying it to obtain an absolute value.
[0015]
The integrating unit 4 has a function of integrating the absolute value of the myoelectric potential during exercise obtained by the amplifying unit 3 at a predetermined time interval T1, and calculating the amount of myoelectric discharge that is the integrated value. Further, the integration unit 4 has a function of repeating the integration every predetermined time interval T1 over a predetermined time T2, and setting the maximum value among the integration values as the maximum muscle discharge amount.
[0016]
The comparison unit 5 has a function of comparing the amount of muscle discharge during exercise with the maximum amount of muscle discharge. The memory unit 6 has a function of storing the maximum muscle discharge amount. The comparison unit 5 includes a memory unit 6.
[0017]
The display unit 7 has a function of presenting the ratio of the muscle discharge amount during exercise to the maximum muscle discharge amount to the human body (user) 10 using the buzzer 7a. Of course, the ratios may be simultaneously displayed using character information (visual information) on a display (not shown). Here, the myoelectric potential measuring apparatus according to the first embodiment includes a setting switch 12 that enables the ratio between the amount of myoelectric discharge during exercise and the maximum amount of myoelectric discharge to be set. When the amount of muscle discharge during exercise exceeds the ratio set in advance by the setting switch 12 with respect to the maximum amount of muscle discharge, it has a function to present using the buzzer 7a.
[0018]
The operation explanation is shown below. First, a method for measuring the maximum muscle discharge amount will be described. The human body (user) 10 exerts the maximum force during a certain time T2 (4.5 seconds in the first embodiment). As a method of exerting the maximum force, such as comparing the force with others (not shown), or using a rigidly fixed wall or the like (not shown) Can be mentioned. When starting measurement of the maximum muscle discharge amount, the human body (user) 10 presses the measurement start switch 11 and then exerts the maximum force within the predetermined time T2. At this time, the myoelectric potential generated between the electrode 1 and the electrode 2 is detected, and the maximum amount of myoelectric discharge is obtained.
[0019]
Then, the amplifying unit 3 amplifies the detected myoelectric potential and rectifies it to obtain an absolute value. FIG. 2B is a waveform diagram of myoelectric potential when the human body (user) 10 exerts the maximum force. Next, the absolute value within the predetermined time T2 is calculated by the integrating unit 4 every predetermined time interval T1 (0.1 second in the first embodiment), which is a time interval for measuring the amount of muscle discharge during exercise. Are integrated, and the maximum value among the integrated values is set as the maximum muscle discharge amount. That is, the maximum value among the 45 integral values obtained by dividing the predetermined time T2 of 4.5 seconds into 45 equal parts is defined as the maximum muscle discharge amount. The memory unit 6 stores the maximum muscle discharge amount.
[0020]
Next, a method for measuring the amount of muscle discharge during exercise will be described. The human body (user) 10 starts exercise and training, and the myoelectric potential generated between the electrodes 1 and 2 is detected. Then, the myoelectric potential detected by the amplifying unit 3 is amplified and rectified to obtain an absolute value. FIG. 2A is a waveform diagram of myoelectric potential when the human body (user) 10 is exercising, and shows the transition of myoelectric potential for 3 seconds. Next, the absolute value is integrated at predetermined time intervals T1 (0.1 seconds in the first embodiment) by the integration unit 4. Then, the comparison unit 5 calculates a ratio between the muscle discharge amount during exercise obtained in this way and the maximum muscle discharge amount stored in the memory unit 6. The display unit 7 presents to the human body (user) 10 by leveling the buzzer 7a when the ratio exceeds the ratio set in advance by the setting switch 12.
[0021]
The fixed time T2 must of course be longer than the predetermined time interval T1, and is 4.5 seconds in the first embodiment. However, the human body (user) 10 may exert maximum force. This value is not particularly limited as long as it can be exceeded.
[0022]
Here, in the first embodiment, the display unit 7 uses auditory information such as a buzzer 7a. However, in addition to this, a means for presenting using auditory information such as a chime or a visual such as a lamp. Of course, it may be configured to have means for presenting using information, means for presenting using voice information (auditory information) such as words, and the like.
In such a myoelectric potential measuring apparatus, the absolute value of the myoelectric potential during exercise obtained by the amplifying unit 3 is integrated at every predetermined time interval T1, so that it is not easily affected by noise. In addition, the amount of muscle discharge during exercise is compared with the maximum amount of muscle discharge of 10 human bodies (users), and the information is presented, so that it is reasonably effective according to the muscle strength of 10 human bodies (users). It is possible to provide a myoelectric potential measuring device that can exercise. Further, the integration unit 4 repeats the integration every predetermined time interval T1 over a predetermined time T2, and the maximum value in each of the integration values is set as the maximum muscle discharge amount. Therefore, an accurate maximum muscle discharge amount is adopted. . In addition, the display unit 7 presents an accurate ratio between the amount of muscle discharge during exercise and the maximum amount of muscle discharge using auditory information, so that the human body (user) 10 can accurately grasp his / her exercise state. Further, since the maximum amount of muscle discharge of the human body (user) 10 is considered not to change greatly in a short period of time, for example, 1 or 2 weeks, it is stored in the memory unit 6 so that the maximum muscle discharge before each exercise starts. There is no need to measure the amount.
[0023]
Next, the second embodiment of the present invention is such that the display unit 7 of the first embodiment is an indicator, and the configuration other than the display unit 7 is the same as that of the first embodiment, and the others are common. For this reason, the same portions are denoted by the same reference numerals, and description of common portions is omitted. FIG. 4 is an external view of the panel unit of the myoelectric potential measuring apparatus according to the second embodiment of the present invention.
[0024]
In the first embodiment, the display unit 7 informs the human body (user) 10 with a buzzer 7a that the amount of muscle discharge during exercise exceeds the ratio set in advance by the setting switch 12 with respect to the maximum amount of muscle discharge. Although the example in the case of showing was shown, in 2nd Embodiment, it is a structure which presents the change of the ratio of the amount of muscle discharge at the time of exercise | movement with respect to the maximum amount of muscle discharge at any time.
[0025]
The display unit 7 has a function of presenting the ratio between the amount of muscle discharge during exercise and the maximum amount of muscle discharge to the human body (user) 10 using the indicator 7b by the lamp light. The indicator 7b is configured to follow the ratio between the amount of muscle discharge during exercise and the maximum amount of muscle discharge, and to illuminate corresponding to the percentage display of the ratio. Of course, the ratios may be simultaneously displayed using character information (visual information) on a display (not shown).
[0026]
The operation explanation is shown below. The display unit 7 presents the ratio between the amount of muscle discharge during exercise and the maximum amount of muscle discharge at any time using an indicator, and the human body (user) 10 exercises and trains while grasping the current state.
[0027]
Here, in the second embodiment, the display unit 7 uses the visual information such as the indicator 7b by light such as a lamp to change the amount of the portion to shine. Measures that use sound information such as buzzers and chimes, how to increase and decrease the volume of sound, and how to present sounds with different heights, and means that change the content using speech information such as words (auditory information) Of course, it may be configured to have.
[0028]
In such a myoelectric potential measuring device, the display unit 7 presents an accurate ratio between the amount of myoelectric discharge during exercise and the maximum amount of myoelectric discharge by visual information, so that the human body (user) 10 can Accurate grasp of exercise status.
[0029]
Here, in the myoelectric potential measuring device according to the first embodiment and the second embodiment, an example in which the setting switch 12 for setting the ratio between the myoelectric discharge amount during exercise and the maximum myoelectric discharge amount is provided. As shown, the setting switch 12 is not provided, and the content to be set by the setting switch 12, that is, the ratio between the amount of muscle discharge during exercise and the maximum amount of muscle discharge set by the human body (user) 10 is a certain fixed value. You may make it set to. In such a case, the number of components can be reduced as compared with the examples shown in the first embodiment and the second embodiment, so that the electrodes 1 and 2 and the measurement / display portion (mounted inside the package 13) are provided. It is possible to configure a myoelectric potential measuring device (not shown) that is further miniaturized as integrated.
[0030]
Note that the present invention is not limited to the myoelectric potential measuring device of the above-described embodiment, and various modifications are possible within the scope of the contents described in the claims. It includes everything.
[0031]
【The invention's effect】
As described above, the myoelectric potential measuring device according to claim 1 of the present invention includes at least one pair of electrodes provided so as to be in contact with the surface of the human body (user). In the myoelectric potential measuring device having a function of detecting the myoelectric potential generated in (2), an amplifying unit having a function of amplifying the myoelectric potential during exercise and rectifying it to obtain an absolute value, and a predetermined time interval The absolute value is integrated every time, and the integral value is calculated as the amount of myoelectric discharge, and the integration for each predetermined time interval is repeated over a fixed time, and the maximum value in each of the integrated values is determined as the maximum myoelectric discharge amount. An integration unit having a function to calculate as, a comparison unit having a function of comparing the ratio of the amount of muscle discharge during exercise and the maximum amount of muscle discharge, and a function of presenting the ratio to the human body And a display unit comprising Comparing the amount of myoelectric discharge with the amount of myoelectric discharge during the exercise, the ratio is presented to the human body, and the absolute value of the myoelectric potential during the exercise obtained by the amplifying unit is determined as the predetermined value. By integrating at every time interval, there is an effect that it is less affected by noise. Further, the present invention provides a myoelectric potential measuring device capable of performing exercise effectively and reasonably according to the muscular strength of the human body (user) by presenting the ratio between the amount of myoelectric discharge during exercise and the maximum amount of myoelectric discharge. There is an effect that can be.
[0032]
Moreover, in the myoelectric potential measuring device according to claim 2, in the invention according to claim 1, the integration unit repeats the integration for each predetermined time interval over a predetermined time, and each integration value thereof. The maximum value among them is set as the maximum muscle discharge amount, and there is an effect that the accurate maximum muscle discharge amount is adopted.
[0033]
Moreover, in the myoelectric potential measuring device according to claim 3, in the invention according to claim 1 or 2, the display unit is configured to calculate a myoelectric discharge amount during the exercise and the maximum myoelectric discharge amount. It has a function of presenting the ratio by at least one of auditory information and visual information, and the human body (user) has an effect of accurately grasping his / her movement state.
[0034]
Moreover, in the myoelectric potential measuring device according to claim 4, in the invention according to any one of claims 1 to 3, the comparison unit stores the maximum amount of myoelectric discharge. Since it is considered that the maximum muscle discharge amount does not change greatly in a short period, it is not necessary to measure the maximum muscle discharge amount before starting each exercise. Play.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a myoelectric potential measuring apparatus according to a first embodiment of the present invention.
FIG. 2 is a waveform diagram showing myoelectric potentials according to the first embodiment of the present invention.
FIG. 3 is an external view showing the myoelectric potential measuring apparatus according to the first embodiment of the present invention.
FIG. 4 is an external view showing a myoelectric potential measuring apparatus according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Electrode 3 Amplification part 4 Integration part 5 Comparison part 6 Memory part 7 Display part 10 Human body 11, 12 Switch 13 Package

Claims (4)

In the myoelectric potential measuring device comprising at least one pair of electrodes provided so as to be in contact with the human body surface and having a function of detecting myoelectric potential generated in the human body,
An amplifying unit having a function of amplifying myoelectric potential during exercise and rectifying and obtaining an absolute value, and a function of integrating the absolute value at a predetermined time interval and calculating the integrated value as a muscle discharge amount And an integration unit having a function of repeating the integration for each predetermined time interval over a predetermined time, and setting the maximum value in each integration value as the maximum muscle discharge amount,
A comparison unit having a function of comparing a ratio between the amount of muscle discharge during exercise and the amount of maximum muscle discharge;
A display unit having a function of presenting the ratio to the human body;
A myoelectric potential measuring device comprising: comparing the maximum amount of myoelectric discharge obtained in advance with the amount of myoelectric discharge during exercise and presenting the ratio to the human body. 2. The myoelectric potential measurement according to claim 1, wherein the integration unit repeats the integration for each predetermined time interval over a predetermined time, and sets a maximum value among the integration values as the maximum myoelectric discharge amount. apparatus. The said display part has the function to show the ratio of the amount of myoelectric discharge at the time of the said exercise | movement, and the said maximum myoelectric discharge amount by at least one of auditory information and visual information. Item 3. The myoelectric potential measuring device according to Item 2. 4. The myoelectric potential measuring device according to claim 1, wherein the comparison unit includes a memory unit for storing the maximum myoelectric discharge amount.

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