WO2022059819A1

WO2022059819A1 - Drowsiness prevention massage device using surface electromyography sensor and personalized drowsiness determination method

Info

Publication number: WO2022059819A1
Application number: PCT/KR2020/012611
Authority: WO
Inventors: 김영관
Original assignee: 주식회사 매클러비앤에이치
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-24

Abstract

The present invention provides a drowsiness prevention massage device using a surface electromyography sensor, and a personalized drowsiness determination method, wherein the device detects a fatigue degree of a user and whether the user is drowsy, by using a surface electromyography (sEMG) sensor, outputs customized micro-current electrical stimulation according to a condition of the user, detects whether the user is drowsy according to individual muscle activity, outputs micro-current electrical stimulation when the user is determined to be in a drowsiness state, and thus can contribute to the improvement of a fatigue degree through muscle stimulation and reduction of a traffic accident rate.

Description

An anti-drowsiness massage device using a surface electromyography sensor and a personalized drowsiness determination method

The present invention detects the user's fatigue and drowsiness by using a surface electromyography (sEMG) sensor, outputs a customized microcurrent electrical stimulation according to the user's condition, detects drowsiness according to individual muscle activity, and returns to a drowsy state It relates to a technology that can contribute to improving fatigue and reducing traffic accident rate through muscle stimulation by outputting microcurrent electrical stimulation at the time of judgment.

Among the causes of recent automobile accidents, the accident with the highest mortality rate is being investigated as drowsy driving due to driver fatigue. In particular, drowsy driving accounts for more than 30% of the ratio of traffic accidents occurring on highways.

As a technology to prevent drowsy driving, studies are being actively conducted to recognize the driver's drowsiness through measurement of the number of blinks of the driver's eyes, analysis of the moving route of the vehicle, frequency of sudden steering wheel manipulation, or image analysis or EEG measurement.

Among them, since the method for preventing drowsiness by measuring biosignals can acquire various signals, many studies are being made to manufacture a more sophisticated anti-drowsiness system in the future, but research on a drowsiness prevention system suitable for users is insufficient.

On the other hand, the appropriate microcurrent is weak alkalinity of blood, expansion of blood vessels, normalization of blood pressure, promotion of diuresis, normalization of pulse, strengthening of heart, increase of collagen synthesis rate, promotion of white blood cell migration, sterilization effect, inhibition of bacterial growth, inhibition of E. coli growth, It has been used in the medical field for decades because it has the effects of improving microvascular blood circulation, promoting protein synthesis, increasing treatment speed by 2 times, promoting recovery from fatigue, purifying autonomic nerves, promoting growth, purifying moisture, and removing odors.

Since microcurrent is within the physiological current range of the body itself, muscle contraction does not occur, sensory comfort, no electrical discomfort, excellent stability, and almost no side effects to the human body even when used for a long time.

Accordingly, various massage devices for massaging a body part by providing electrical stimulation with a microcurrent have been developed.

Korean Patent No. 10-2059465 discloses a device for preventing drowsiness based on EMG signal measurement, which can prevent drowsy driving by measuring the user's EMG signal to determine the user's status, and taking appropriate measures in case of drowsiness. there is.

However, in the prior art, only a technique for providing vibration when a user is in a drowsy state is included, and thus, a method for a case in which drowsiness cannot be awakened when the user is dulled by vibration is not provided.

In addition, various studies are being attempted in relation to driver's drowsiness monitoring, alarm alarm, and vehicle speed control by continuously measuring the driver's bio-signals using IoT (Internet of Things) technology and wirelessly transmitting and analyzing data.

Systems that measure bio-signals such as electroencephalography (EEG), electrocardiography (ECG), and electromyography (EMG) are already on the market in various products. but. Electroencephalography requires multiple electrodes to be worn on the driver's head, and the measurement system for detecting and analyzing weak EEG signals is the largest and most expensive. The disadvantage is that the correlation of ECG changes is not great.

Electromyography is a method of measuring muscle fatigue, tension, and relaxation, and it has been proven according to various research results to be closely related to changes in EMG signals following drowsy driving.

Accordingly, it is intended to propose a technology to determine whether a user is drowsy by measuring the EMG state of a user who needs to quickly determine whether he or she is drowsy, such as a driver including a test taker, and to wake up drowsiness by providing electrical stimulation with a microcurrent when drowsy.

Korea Patent No. 10-1646401 discloses a heart rate measurement module that detects a driver's heart rate and outputs a heart rate signal corresponding to the detected heart rate, and a vehicle that measures the driving state of the vehicle and outputs a vehicle signal corresponding to the measured driving state. A drowsiness pattern detection module that determines whether the driver is drowsy using a signal measurement module, a heartbeat signal and a vehicle signal, and outputs an alarm signal for drowsiness when determined to be drowsy Disclosed is a system for determining a driver's drowsiness state and a method for determining the same, including a.

However, the conventional method for determining the state of drowsiness determines whether or not a user is drowsy based on a drowsiness reference value set based on data extracted from a plurality of users. Failure to determine drowsiness in a personalized way.

Therefore, the present invention was derived to solve the above-mentioned problems, and the present invention detects the user's fatigue and drowsiness using a surface electromyography (sEMG) sensor, and outputs a customized microcurrent electrical stimulation according to the user's condition. An object of the present invention is to provide a technology that can contribute to improving fatigue through muscle stimulation and reducing the rate of traffic accidents.

Another object of the present invention is to provide a technology capable of providing a massage function by controlling the microcurrent that is formed in a wearable form and is in close contact with the user's shoulder and trapezius and output to each of the shoulder and trapezius.

Another object of the present invention is to provide a technique for continuously massaging a user's shoulder and trapezius by controlling electrical stimulation according to an EMG signal according to a user's fatigue or drowsiness state and a massage mode desired by the user.

In addition, the present invention was derived to solve the above problems, and the present invention detects drowsiness according to individual muscle activity using a surface electromyography (sEMG) sensor, and outputs microcurrent electrical stimulation when drowsy to stimulate muscle Another object is to provide a technology that can contribute to improving fatigue and reducing the rate of traffic accidents.

Another object of the present invention is to provide a technology capable of detecting individual drowsiness sensitively by removing noise for various motions and noise situations of a user from an EMG signal and standardizing the EMG signal.

In addition, the present invention provides a technology that can detect individualized drowsiness by calculating the average value of drowsiness symptoms based on the data collected before determining whether or not drowsiness and comparing the average value of drowsiness symptoms with the current muscle activity for each individual. It has a different purpose.

Other objects of the present invention will become clearer through the examples described below.

An anti-drowsiness massage device using a surface electromyography sensor according to an aspect of the present invention comprises: a main body comprising a first adhesive part covering both shoulders of a user, and a second adhesive part extending from the first adhesive part to the trapezius region; an electrode pad including a first electrode portion disposed in the first contact portion and providing electrical stimulation to the shoulder, and a second electrode portion disposed in the second contact portion and providing electrical stimulation to the trapezius muscle; an EMG sensor disposed in the second adhesion portion and generating an EMG signal according to muscle contraction or relaxation of the trapezius muscle; and a controller for estimating a change in the user's posture according to the EMG signal, and outputting an electric massage signal through the electrode pad when the user's drowsiness state is determined from the estimated value.

The anti-drowsiness massage device using the surface electromyography sensor according to the present invention may include one or more of the following embodiments.

For example, the first adhesive part is made of a soft material that can maintain a curved state after being curved to fit the user's shoulder body shape, and the second adhesive part is bent along the spine line to fit the user's back body shape. It may be composed of a flexible material capable of maintaining a bent state.

The controller may classify a plurality of stages of drowsiness according to the estimated posture change, and output a massage electric signal of a preset massage mode to the electrode pad according to the current drowsiness state.

The first electrode part and the second electrode part include a plurality of electrode pads, and the controller operates in any one of a first mode, a second mode, and a third mode according to the current drowsiness state, and the first mode is, through the plurality of electrode pads, a massage electric signal is output in a rolling massage pattern to the shoulder and trapezius, in the second mode, a massage electric signal is output in a cross pattern to the shoulder and trapezius, and the third mode is a shoulder and A massage electric signal may be output to stimulate the trapezius muscle from a weak intensity to a strong intensity.

The controller monitors whether the first electrode part and the user's shoulder are in contact and whether the second electrode part and the user's trapezius are in contact using the EMG sensor, and when the contact strength is less than a reference value, the first electrode part And it is possible to output a massage electric signal of a preset maximum intensity through the second electrode unit.

The second electrode part may be formed to protrude so that a position corresponding to the user's great hypovolemia has a cusp.

According to another aspect of the present invention, a personalized method for determining drowsiness using a surface EMG sensor is a method for determining drowsiness using a surface EMG sensor in close contact with a user's body muscles, wherein the muscle contraction or relaxation of the muscle through the surface EMG sensor measuring an EMG signal according to removing at least one of electrical noise included in the EMG signal, environmental electromagnetic noise, and dynamic noise by applying a noise removal filter; and calculating an average amplitude value for each user with respect to the EMG signal up to the nth time from which the noise is removed, and determining whether the user is drowsy by comparing the average amplitude value with the current amplitude value at the n+1th time. includes

The method for determining personalized drowsiness using a surface electromyography sensor according to another aspect of the present invention may include one or more of the following embodiments.

For example, in the step of removing the noise, the electrical noise included in the EMG signal is removed using a Butterworth filter, and the surrounding area included in the EMG signal is removed using an elliptic filter. It may be characterized in that the environmental electromagnetic noise is removed, and the dynamic noise included in the EMG signal is removed by using a Chebyshev filter.

Determining whether the user is drowsy may include: performing normalization based on Maximum Voluntary Contraction (MVC) on the EMG signal up to the n-th time from which the noise is removed; and calculating an average amplitude value by excluding the lowest amplitude value and the highest amplitude value from the standardized EMG signal.

The step of determining whether the user is drowsy may include determining that the current amplitude value is greater than the average amplitude value as normal driving, and storing the current amplitude value in a general driving database.

The determining whether the user is drowsy may include determining that the user is drowsy when the current amplitude value is smaller than the average amplitude value, and storing the current amplitude value in a drowsiness database.

The method may further include outputting an electric massage signal by controlling an electrode pad interlocked with the surface EMG sensor according to whether the user is drowsy.

Outputting the electric massage signal may include storing the electrical stimulation level for the output electric massage signal in association with the n+1 time.

In the step of outputting the electric massage signal, when the electric massage signal is outputted to the first electric stimulation level at the n+1th time and then the electric massage signal is continuously output at the n+2th time, the first electric stimulation level It may include outputting an electric massage signal with a higher intensity second electric stimulation level.

The drowsiness prevention massage device and the personalized drowsiness determination method using a surface electromyography sensor according to the present invention provide the following effects.

The present invention detects the user's fatigue and drowsiness using a surface electromyogram (sEMG) sensor, and outputs customized microcurrent electrical stimulation according to the user's condition, thereby improving fatigue and reducing the traffic accident rate through muscle stimulation. there is

The present invention has the effect of providing a massage function by controlling the microcurrent that is formed in a wearable form, is in close contact with the user's shoulder and trapezius, and is output to each of the shoulder and trapezius.

The present invention has the effect of continuously massaging the user's shoulder and trapezius by controlling the electrical stimulation according to the user's desired massage mode and the EMG signal according to the user's fatigue or drowsiness state.

The present invention detects drowsiness according to individual muscle activity using a surface electromyography (sEMG) sensor, and outputs microcurrent electrical stimulation when drowsy, thereby improving fatigue and reducing the traffic accident rate through muscle stimulation.

The present invention has the effect of removing noise for various motions and noise situations of the user from the EMG signal, and can detect individual drowsiness sensitively by standardizing the EMG signal.

According to the present invention, the average value of drowsiness signs is calculated based on data collected up to the point in time before drowsiness is determined, and by comparing the average value of drowsiness signs with the muscle activity for each individual's current driving, individualized drowsiness can be detected.

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

1 is a perspective view illustrating an anti-drowsiness massage device using a surface electromyography sensor according to the present invention.

Figure 2 is an exploded perspective view showing the drowsiness prevention massage device using a surface electromyography sensor according to the present invention.

3 is a front view showing a drowsiness prevention massage device using a surface electromyography sensor according to the present invention.

Figure 4 is a rear view showing the drowsiness prevention massage device using a surface electromyography sensor according to the present invention.

5 and 6 are views showing before and after the user wears the anti-drowsiness massage device using the surface EMG sensor according to the present invention.

7 is a diagram illustrating generation of an electrical signal in the first mode provided by the anti-drowsiness massage device using a surface electromyogram sensor according to the present invention.

8 is a diagram illustrating generation of an electrical signal in the second mode provided by the anti-drowsiness massage device using a surface electromyography sensor according to the present invention.

9 is a diagram illustrating generation of an electrical signal in a third mode provided by the anti-drowsiness massage device using a surface electromyography sensor according to the present invention.

10 is a flowchart illustrating a process for determining personalized drowsiness using a surface EMG sensor according to an aspect of the present invention.

11 is a flowchart illustrating a process for determining personalized drowsiness using a surface EMG sensor according to another aspect of the present invention.

12 is a graph showing wavelengths according to the muscle tension and relaxation states measured through the surface electromyography sensor.

13 is a graph illustrating wavelengths according to a user's awake state and drowsiness state measured through a surface electromyography sensor.

14 is a graph for explaining a technique used to standardize a measurement value measured through an EMG signal.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numbers regardless of reference numerals, and overlapping A description will be omitted.

Hereinafter, an anti-drowsiness massage device using a surface electromyogram sensor according to embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9 .

1 is a perspective view showing an anti-drowsiness massage device using a surface EMG sensor according to the present invention, FIG. 2 is an exploded perspective view illustrating an anti-drowsiness massage device using a surface EMG sensor according to the present invention, and FIG. 3 is the present invention It is a front view showing the anti-drowsiness massage device using a surface EMG sensor according to the present invention, Figure 4 is a rear view showing the anti-drowsiness massage device using a surface EMG sensor according to the present invention, Figures 5 and 6 are in the present invention It is a view showing before and after the user wears the anti-drowsiness massage device using the surface electromyography sensor.

1 to 6 , the anti-drowsiness massage device 100 using the surface electromyography sensor according to the present invention may be seated on the user's shoulder and trapezius to massage the shoulder and trapezius muscles. The anti-drowsiness massage device 100 using a surface electromyography sensor detects the fatigue and drowsiness of a user, particularly a user driving a vehicle, provides customized micro-current electrical stimulation (Micro Current), and improves fatigue through stimulation of the shoulder and trapezius muscles This can contribute to the reduction of the traffic accident rate.

The anti-drowsiness massage device 100 using a surface electromyography sensor is connected to the mobile terminal 200 through wireless communication, and all operations necessary for massage of the shoulder and trapezius muscles are controlled through an application installed in the mobile terminal 200. In addition, information and history related to massage can be managed. For example, wireless communication may be performed through Bluetooth.

The application may be installed on the user's mobile terminal 200 to control the drowsiness prevention massage device 100 using a surface electromyography sensor. The application controls the power on/off of the anti-drowsiness massage device 100 using the surface electromyography sensor, controls the change of the massage mode, controls the intensity of the massage mode, and stores the user's basic information and body information before and after the massage. It is possible to compare and analyze the state of the body afterward, and to store and manage a history of performing a massage.

In addition, the application displays the power on/off of the anti-drowsiness massage device 100 using the surface electromyography sensor, displays whether the user is drowsy, displays the massage mode, displays the electrical signal strength of the massage mode, and The remaining time may be displayed, the wireless communication connection state may be displayed, the remaining battery level may be displayed, and an alarm may be output when charging is required based on the remaining battery level.

Hereinafter, the configuration of the anti-drowsiness massage device 100 using the surface electromyography sensor according to the present invention will be described in detail.

The anti-drowsiness massage device 100 using a surface EMG sensor includes a body 110 , an electrode pad 120 , an EMG sensor 130 , and a controller 140 .

The main body 110 is entirely made of a soft material, for example, TPI (thermoplastic polyimide, thermoplastic polyimide), so it can be changed according to the user's body type, and can be in close contact with the user's shoulder and back including the trapezius muscle. The body 110 is formed in a wearable form that can be worn even when the user is wearing clothes.

The main body 110 is formed to extend from the first adhesive part 111 to the trapezius region and is formed of a first adhesive part 111 made of a soft material that closely wraps around both shoulders of the user, and is in close contact with the user's trapezius muscle ( 112).

The electrode pad 120 corresponding to the first electrode part 121 capable of covering the muscles of the user's curved shoulder is attached to the first adhesion part 111 . The first adhesion part 111 may be formed of a soft material capable of maintaining the curved state after being curved to fit the user's shoulder body shape.

The second adhesion part 112 is an electrode pad 120 corresponding to a plurality of second electrode parts 122-1, 122-2, 122-3 capable of covering the user's right trapezius muscle and the left trapezius muscle, respectively. is attached The second adhesion part 112 may be made of a soft material that can maintain a bent state after being bent along a spine line in accordance with the user's back body shape.

In one embodiment, each of the first and

second adhesion parts

111 and 112 is formed so that the first electrode part 121 and the second electrode part 122-1, 122-2, 122-3 are attached to each other. An attachment groove (not shown) may be formed for The attachment groove is formed in a size and shape corresponding to each of the first electrode part 121 and the plurality of second electrode parts 122-1, 122-2, and 122-3, so that the first electrode part 121 and the plurality of second electrode parts 122-1, 122-2, 122-3 are formed. The electrode pads 120 for each of the second electrode parts 122-1, 122-2, and 122-3 may be made to be more closely attached to the first and second

adhesive parts

111 and 112 .

The main body 110 is a second contact portion 112 to the elastic portion (H1) of the front surface after each of the elastic parts (H1, H2) made of silicone are attached to the front side, which is a portion in contact with the user's body, and the rear side opposite to the front side, respectively. ) can be attached. This is to position the second electrode parts 122-1, 122-2, 122-3 attached to the second adhesive part 112 while holding the shape of the second adhesive part 112 once more, The user's spine line is positioned between the left elastic part H1 and the right elastic part H1 so that the second electrode parts 122-1, 122-2, 122-3 can be more closely attached to the user's body. there is.

The electrode pad 120 may be configured to be energized through a person by embedding a conductor having an electrode having a size of 2 to 5 cm. The electrode pad 120 increases the contact area between the curved shoulder and trapezius, has uniform and stable current density, and can be attached to the user's body without using a separate adhesive gel.

The electrode pad 120 may be disposed on the main body 110 , more specifically, the elastic part H1 , and may acupressure and massage the user's shoulder and trapezius according to an electrical signal controlled by the controller 140 .

The electrode pad 120 is attached to the first electrode part 121 to provide electrical stimulation to the user's shoulder by being attached to the first adhesive part 111, and to the second adhesive part 112 to provide electrical stimulation to the user's trapezius muscle. and a plurality of second electrode units 122-1, 122-2, and 122-3 providing In the present invention, it is described that the first electrode unit 121 is composed of two and the plurality of second electrode units 122-1, 122-2, and 122-3 are composed of three, but this is not intended to be limited thereto.

The first electrode part 121 is formed in a substantially rectangular shape so as to cover all of the user's shoulder from the front to the rear, and is bent together with the first adhesive part 111 to be in close contact with the user's shoulder. The shoulder stimulation unit 121 may be divided into a plurality of parts, and may output an electric signal under the control of the controller 140 to acupressure and massage the user's shoulder.

The plurality of second electrode parts 122-1, 122-2, 122-3 are respectively formed in a substantially triangular shape to cover the user's trapezius, and the elastic part H1 disposed on the second adhesion part 112 . ), it can adhere to the user's trapezius without changing the shape. The plurality of second electrode units 122-1, 122-2, 122-3 may output the same or different electric signals according to the control of the controller 140 to acupressure and massage the user's trapezius muscles.

In one embodiment, at least one of the plurality of second electrode units 122-1, 122-2, 122-3 is formed to protrude such that a position corresponding to the user's hypotension has a cusp. You can stimulate hypotension by further pressing . Here, since the positions of the plurality of second electrode units 122-1, 122-2, and 122-3 may change according to the user's body type, a certain radius from the average position of the hypothalamus obtained from a plurality of users. It may be formed to protrude to have a cusp as much as possible. Daejeohyeol is the place where the qi of all bones in the human body gather, and it is effective when acupressure is applied to colds, coughs, neck/bone/bone symptoms, and chest pain.

The first electrode unit 121 and the plurality of second electrode units 122-1, 122-2, 122-3 output electrical signals to provide microcurrent electrical stimulation to the user's shoulder and trapezius muscles, thereby causing muscle contraction. It is possible to prevent the user from drowsiness by providing an exercise effect according to the hyper-relaxation and repeated action, and by increasing the distribution of capillaries to expand peripheral blood vessels.

On the other hand, it is preferable that the first electrode part 121 and the plurality of second electrode parts 122-1, 122-2, 122-3 each include the same number of electrodes. It is possible to prevent deflection of the current flowing through the user, and to provide electrical stimulation with an optimal balance to the body part of the compartment corresponding to each electrode.

The EMG sensor 130 is disposed on the second adhesion part 112 to measure a surface electromyography (sEMG) of the trapezius, and generates an EMG signal according to muscle contraction or relaxation of the trapezius.

The EMG sensor 130 is a sensor that measures a biosignal, and based on the wavelength when the muscle is stable (muscle relaxation) and the wavelength when the muscle is tense (muscular contraction), the EMG signal for the muscle relaxation state and muscle contraction It is possible to generate an EMG signal for the state.

The controller 140 is a module for controlling the electrical signal output from the electrode pad 120 based on the EMG signal generated from the EMG sensor 130 , and is formed separately from the main body 110 , or is formed separately from the main body 110 . It may be formed to be detachably attached to the elastic part H2 attached to the rear surface.

The controller 140 is connected to the mobile terminal 200 through wireless communication, and is linked with an application installed on the mobile terminal 200 to control the on/off of the power, and to change the massage mode associated with the electrode pad 120 . It is possible to control, control the electrical stimulation strength of the massage mode, display the massage mode, display the electrical stimulation strength of the massage mode, display the connection state of wireless communication, and display the remaining amount of the battery.

The controller 140 performs at least one of on/off control of power, change control of massage mode, and electric stimulation intensity control of massage mode by itself based on the EMG signal for the muscle state of the user's shoulder and trapezius. can be manufactured.

In an embodiment, the controller 140 may display a massage mode including a display screen, display the intensity of the massage mode, display a wireless communication connection state, and display the remaining amount of the battery.

In one embodiment, the controller 140 measures the electrode impedance for each of the first electrode part 121 and the plurality of second electrode parts 122-1, 122-2, 122-3 to determine the first It is possible to monitor whether the electrode unit 121 is in contact with the user's shoulder and whether the plurality of second electrode units 122-1, 122-2, 122-3 and the user's trapezius are in contact. When the measured electrode impedance value is smaller than a preset reference value, the controller 140 causes the first electrode part 121 and the plurality of second electrode parts 122-1, 122-2, 122-3 to come into contact with the user's body. It can be judged that it does not work or that the contact condition is not good.

In this case, the controller 140 continuously outputs electric signals to the first electrode unit 121 and the plurality of second electrode units 122-1, 122-2, 122-3 at a predetermined period, but increases the intensity of the massage mode. By outputting an electrical signal with a preset maximum strength, the user can induce contact between the shoulder and trapezius muscle.

The controller 140 estimates a change in the user's posture according to the EMG signal, and determines the drowsiness state from the estimated value. When it is determined that the controller 140 is in a drowsy state, the controller 140 determines a massage mode to control an electrical signal output to the electrode pad 120 . When it is determined that the user is in a drowsy state, the controller 140 may control an electrical signal for providing one of the first mode, the second mode, and the third mode among the massage modes.

The controller 140 classifies a plurality of stages of drowsiness according to the estimated user's posture change, and receives electric massage signals of a massage mode including a first mode, a second mode, and a third mode preset according to the current drowsiness state. It can output to the electrode pad 120 . The drowsiness state of the plurality of stages may be determined according to the degree of muscle contraction measured by the EMG sensor 130, for example, the drowsiness stage of the first muscle contraction state, the second muscle contraction that is more muscle-contracted than the first muscle contraction state It can be classified into a drowsiness stage of the state, a drowsiness stage of a third muscle contraction state in which more muscle contraction than the second muscle contraction state is present.

The massage mode is a first mode in which a massage electrical signal is output in a rolling massage pattern to the shoulder and trapezius through the electrode pad 120 to stimulate the shoulder and trapezius, and a massage electrical signal is output in a cross pattern to the shoulder and trapezius to stimulate the shoulder and trapezius The second mode stimulates the muscles and the third mode stimulates the shoulder and trapezius muscles from weak intensity to strong intensity.

Here, the controller 140 outputs a continuous electrical stimulation to the first electrode unit 121 at a predetermined period by setting the voltage of the first electrode unit 121 to +, and the first mode, the second mode, and the third mode. According to a massage mode including When the first electrode unit 121 is divided into at least two or more, the voltage is set to + at all pads to continuously output electrical stimulation at a predetermined period.

In addition, the controller 140 sets the voltage of the plurality of second electrode units 122-1, 122-2, and 122-3 to +, and sets the voltage of the plurality of second electrode units 122-1, 122-2, 122-3. ) to output continuous electrical stimulation at a certain period, and output electrical signals to the first electrode unit 121 for a preset runtime according to massage modes including the first mode, the second mode, and the third mode. By further including the method, at least six massage control methods may be provided. When the first electrode unit 121 is separated into at least two or more, the first electrode unit 121 may sequentially output an electrical signal during a preset runtime.

Hereinafter, one first electrode unit 121 is provided and a plurality of second electrode units 122-1, 122-2, 122-3 are configured to output an electric signal according to the massage mode. It is obvious that the same can be applied even when a plurality of first electrode units 121 are provided.

In the first mode, an electric signal is continuously outputted to the first electrode unit 121 at a predetermined period, an electric signal is output to the first second electrode unit 122-1 for a first runtime, and then the second second electrode unit is output. After outputting the electrical signal to 122 - 2 during the first runtime, the electrical signal may be output to the third second electrode unit 122 - 3 during the first runtime.

Also, in the first mode, all of the plurality of second electrode units 122-1, 122-2, and 122-3 or one of the plurality of second electrode units 122-1, 122-2, 122-3 is applied at a predetermined period. Continuously outputting an electrical signal, outputting an electrical signal for a first runtime to the first electrode part 121 and then outputting an electrical signal for a first runtime to the first electrode part 121 again after the first runtime has passed The action can be repeated.

Hereinafter, the operation of the first mode will be described, but will be described as an operation in which the voltage of the first electrode unit 121 is set to +.

Referring to FIG. 7 , the first mode outputs a square wave having a pulse width of 400 u sec as a basic waveform. In the first mode, the first electrode unit 121 outputs continuity (A-1) of 400 u sec with a period (B-1) of 142 m sec for 15 minutes for a total operation time (D-1) of the first electrode unit 121 (510), Conduction (A-) of 400 u sec with a period of 142 m sec (B-1) sequentially in the plurality of second electrode parts 122-1, 122-2, 122-3 for every 1 runtime (C-1; 1 minute) 1) is output (520 to 550).

In the first mode, an electrical signal is sequentially and repeatedly output twice to the first second electrode unit 122-1, the second second electrode unit 122-2, and the third second electrode unit 122-3. Then, the electrical signals are applied to the plurality of second electrode units 122-1, 122-2, and 122-3 in reverse sequential order, that is, the third second electrode unit 122-3 and the second second electrode unit 122- 2), the first and second electrode units 122-1 are repeated twice again in the order of output.

Accordingly, in the first mode, the waveform continuously output from the first electrode part 121 and the first second electrode part 122-1, the second second electrode part 122-2, and the third second electrode part In (122-3), the waveforms sequentially and repeatedly output every first runtime (C-1; 1 minute) and the third second electrode part 122-3, the second second electrode part 122-2, and the second The effect of stimulating the shoulder and trapezius to roll may be given by the waveform sequentially and repeatedly output from the first second electrode unit 122-1 every first runtime (C-1; 1 minute).

In this example, stimulation by an electrical signal is set at 6 to 9 times per second, and the voltage of the electrical signal is set between 20 and 100V, so that an excessive current flows by direct contact between the electrode and the human body so that the user does not feel pain. It may be set to maintain a constant micro-current (about 0.1 mA) per unit area.

In the second mode, an electric signal is continuously output to the first electrode unit 121 at a predetermined period, and the first second electrode unit 122-1 and the second second electrode unit 122-2 during the second runtime. After outputting the electrical signal, the electrical signal may be output to the first second electrode unit 122-1 and the third second electrode unit 122-3 during the second runtime.

Also, in the second mode, all of the plurality of second electrode units 122-1, 122-2, and 122-3 or one of the plurality of second electrode units 122-1, 122-2, 122-3 is applied at a predetermined period. Continuously outputting an electrical signal, outputting an electrical signal for a second runtime to the first electrode part 121 and then outputting an electrical signal to the first electrode part 121 for a second runtime again after the second runtime has passed The action can be repeated.

The operation of the second mode will be described below, but will be described as an operation in which the voltage of the first electrode unit 121 is set to +.

Referring to FIG. 8 in detail, in the second mode, the first electrode unit 121 conducts 800u sec at a period (B-2) of 142m sec for 15 minutes for the total operation time (D-2) (A-2). ) is output (610), and conduction (A-21) of 400 u sec with a period (B-2) of 142 m sec in the first second electrode part 122-1 during the second runtime (C-2; 1 minute) (A-21) . After that, during the second runtime (C-2; 1 minute), the first second electrode part 122-1 outputs the conduction (A-21) of 400 u sec at the period (B-2) of 142 m sec and at the same time the second 3 The second electrode unit 122-3 outputs conduction (A-22) of 400 u sec with a period (B-2) of 142 m sec (630, 640). Here, the sum of the conduction (A-21) and conduction (A-22) is set to be equal to the conduction (A-2).

In the second mode, after outputting an electric signal to the first second electrode unit 122-1 and the second second electrode unit 122-2, the first second electrode unit 122-1 and the third second The operation of outputting the electrical signal to the electrode unit 122-3 is repeated a total of 7 times, and a break of about 10 seconds is provided in the middle of the repetition.

Accordingly, in the second mode, the waveform continuously output from the first electrode part 121 and the second runtime (C-) in the first second electrode part 122-1 and the second second electrode part 122-2 2; 1 minute) and the waveforms output during the second runtime (C-2; 1 minute) from the first second electrode unit 122-1 and the third second electrode unit 122-3 By crossing the shoulder and trapezius, it can give the effect of cross-stimulating.

In the third mode, an electric signal is continuously output at a predetermined period to the first electrode unit 121 , and the first cycle and the first cycle are sequentially applied to the plurality of second electrode units 122-1, 122-2, 122-3. After outputting an electrical signal having an intensity, a second period shorter than the first period and a second intensity greater than the first intensity are sequentially applied to the plurality of second electrode units 122-1, 122-2, 122-3. An electrical signal can be output.

Also, the third mode is constant for all of the plurality of second electrode units 122-1, 122-2, and 122-3 or one of the plurality of second electrode units 122-1, 122-2, 122-3. After outputting an electric signal continuously with a periodicity, and outputting an electric signal having a first period and a first intensity to the first electrode unit 121 , a second period and a second period shorter than the first period are outputted to the first electrode unit 121 . An operation of outputting an electrical signal having a second intensity greater than one intensity may be repeated.

Hereinafter, the operation of the third mode will be described, but will be described as an operation in which the voltage of the first electrode unit 121 is set to +.

Referring to FIG. 9 , in the third mode, the first electrode unit 121 conducts 1600u sec with a period (B-3) of 142m sec for 15 minutes for a total operation time (C-3) of 1600u sec (A-3). ) and output 710 , and at the same time outputting 400u sec of conduction (A-31) with a 142m sec period (B-3) in the first second electrode part 122-1 and the second second electrode part At (122-2), the continuity (A-32) of 400 u sec is output with a period (B-3) of 142 m sec, and at the same time, the third second electrode part (122-3) has a period of 142 m sec (B-3) ) to output 400u sec continuity (A-33). Here, when the second electrode part is divided into four, the remaining second electrode part (not shown) outputs conduction (A-34) of 400 u sec with a period (B-3) of 142 m sec (720 to 750).

The sum of the conduction (A-31), conduction (A-32), conduction (A-33), and conduction (A-34) is set to be equal to conduction (A-3).

The third mode is a plurality of second modes while the first electrode unit 121 outputs conduction (A-3) of 1600 u sec with a period (B-3) of 142 m sec for 15 minutes for a total operation time (C-3) of the first electrode unit 121 . 400u sec of conduction (A-31 to A-34) is output for 5 minutes with a 142m sec cycle (B-3) from the electrode parts 122-1, 122-2, 122-3, and after a break of about 10 seconds, 71m 400u sec of conduction (A-4) is output for 4 minutes with a sec period (B-4) (760), and after a break of about 10 seconds, 400u sec of conduction (A-5) with a 35.5 m sec period (B-5) is output for 2 minutes (770), and after a break of about 10 seconds, 7 seconds at a 142 m sec cycle (B-3), 7 seconds at a 71 m sec cycle (B-4), 7 seconds at a 35.5 m sec cycle (B-5) is repeated 10 times.

The third mode can increase the intensity of stimulation transmitted to the shoulder and trapezius by gradually outputting an electrical signal in a short cycle, thereby giving the effect of stimulating the shoulder and trapezius from a weak intensity to a strong intensity.

On the other hand, the anti-drowsiness massage device 100 using a surface electromyography sensor according to the present invention includes a battery unit (not shown) that generates a current of 0.01 to 1.0 mA for outputting an electrical signal, a preset leakage current permissible standard (1.0 mA). ), a current blocking unit (not shown) that cuts off the supply of current when exceeding the standard according to, a wireless communication unit (not shown) that wirelessly communicates with the mobile terminal 200, and a charging unit (not shown) for charging the battery unit further may include

Hereinafter, a method for determining personalized drowsiness using a surface EMG sensor according to embodiments of the present invention will be described in detail with reference to FIGS. 10 to 14 .

According to an aspect of the present invention, the personalized method for determining drowsiness using a surface EMG sensor is seated on the user's body, measures the EMG signal through the surface EMG sensor, and provides microcurrent electrical stimulation (Micro Current) according to the EMG signal. It is performed based on an algorithm programmed in the anti-drowsiness massage device that massages the body muscles.

As shown in FIG. 10 , the personalized drowsiness determination process using the surface EMG sensor according to an aspect of the present invention uses the surface EMG sensor in close contact with the user's body muscles to obtain an EMG signal according to muscle contraction or relaxation. Measure (S110).

The surface electromyography sensor is a sensor that measures biological signals, based on the wavelength (R) when the muscle is stable (muscle relaxation) and the wavelength (C) when the muscle is tense (muscle contraction) as shown in the graph of FIG. 12 . An EMG signal for a muscle relaxation state and an EMG signal for a muscle contraction state may be generated.

On the other hand, FIG. 13 is a graph showing the amplitude according to the user's awake state and drowsiness state measured through the surface electromyography sensor. In this state, the muscle relaxes and shows the wavelength (S) of the muscle relaxation state.

When the EMG signal is measured through the surface EMG sensor, noise included in the EMG signal is removed by applying a noise removal filter (S120).

The noise removal filter is described as including a Butterworth filter, an elliptic filter, and a Chebyshev filter, but is not intended to be limited thereto, and the electrical noise included in the EMG signal, the surrounding environment Any known filter can be applied as long as it can effectively remove noise and dynamic noise.

The Butterworth filter is a filter that removes noise for the purpose of acquiring an analog EMG signal. It removes the electrical noise included in the EMG signal, and is implemented by designing the corner frequency, maximum pass region gain, and filter order. .

The elliptic filter is a filter capable of high blocking by adding a notch in the stop range when the power source noise in the surrounding environment is high.

The Chebyshev filter is a filter that more effectively removes user's abrupt actions and frequent motion noise. It removes the dynamic noise included in the EMG signal. It is implemented by designing the maximum pass-range gain, rejection frequency and filter order in consideration of the wave loss.

When noise is removed from the EMG signal, the amplitude of the EMG signal measured up to the n-th time is normalized based on MVC (Maximum Voluntary Contraction). Here, the n-th time is a time immediately before the time when it is determined whether the user is drowsy, and corresponds to a time elapsed from the first time at which the EMG signal is measured.

Since the amplitude of the EMG signal is affected by the electrode attachment position, the user's body, the date of measurement, etc., to solve this problem, the amplitude can be normalized with the reference value (MVC).

Normalization changes the measured EMG signal in a ratio unit to remove the influence of the measurement state included in the EMG signal.

After that, MDM (Mean Dynamic Methods) and PDM (Peak Dynamic Methods) techniques that analyze the average signal and the highest signal from the standardized EMG signal are applied, and the average amplitude value for each user is excluded by excluding the lowest and highest amplitude values. is calculated (S130) (refer to FIG. 14).

That is, when the noise of the EMG signal measured from the first time to the nth time, which is the first time at which the measurement of the EMG signal is started, is removed. The EMG signal from which the noise has been removed until the nth time is standardized, and an average amplitude value according to muscle activity for each user is calculated based on the standardized EMG signal. This is to calculate an average amplitude value, which is a criterion for determining whether the user is drowsy, based on the muscle activity measured from each user, since the muscle activity is different for each user.

When the average amplitude value for each user is calculated for the EMG signal up to the nth time, the user compares the average amplitude value with the current amplitude value for the EMG signal measured at the n+1th time, that is, the time to determine whether the user is currently drowsy. It is determined whether the person is sleepy (S140).

If the current amplitude value is greater than the average amplitude value, muscle relaxation is not achieved, and the muscle activity is high, so it is determined as normal operation, and the current amplitude value is stored in the general operation database (S150).

The current amplitude value stored in the general driving database is accumulated and included as data when calculating the average amplitude value for determining whether the user is drowsy at the n+2 th time.

When the current amplitude value is smaller than the average amplitude value, muscle relaxation is achieved, and the muscle activity is low, so it is determined as drowsiness, and the current amplitude value is stored in the drowsiness database (S160).

In an embodiment, the current amplitude value stored in the drowsiness database can be utilized as big data when analyzing the EMG signal for each user's drowsiness state later and used to calculate the average amplitude value, thereby increasing the accuracy of the average amplitude value. there is.

Thereafter, an electric massage signal is output by controlling the electrode pad interlocked with the surface electromyography sensor to awaken drowsiness by giving microstimulation to the user's muscles determined to be drowsy (S170).

In one embodiment, the electrode pad may be configured to be energized through a person by embedding a conductor having an electrode having a size of 2 to 5 cm. The electrode pad increases the contact area of the curved body, the current density is uniform and stable, and can be attached to the user's body without using a separate adhesive gel.

The electrode pad outputs an electric massage signal to provide micro-current electrical stimulation to the user's muscles, providing exercise and massage effects according to the repeated action of contraction and relaxation of the muscle, and by increasing the distribution of capillaries to expand peripheral blood vessels. It can prevent the user from drowsiness.

According to another aspect of the present invention, the personalized drowsiness determination method using a surface electromyogram sensor according to another aspect of the present invention is similar to FIG. It is performed based on an algorithm programmed in an anti-drowsiness massage device that provides (Micro Current) to massage body muscles.

As shown in FIG. 11 , the personalized drowsiness determination process using the surface EMG sensor according to another aspect of the present invention is an EMG signal according to muscle contraction or relaxation of the muscle through the surface EMG sensor in close contact with the user's body muscles. is measured (S210).

When the EMG signal is measured through the surface EMG sensor, noise included in the EMG signal is removed by applying a noise removal filter (S220).

When noise is removed from the EMG signal, the amplitude of the EMG signal measured up to the nth time is normalized based on MVC (Maximum Voluntary Contraction), and the average signal and maximum value of the standardized EMG signal MDM (Mean Dynamic Methods) and PDM (Peak Dynamic Methods) techniques for analyzing a signal are applied, and the average amplitude value for each user is calculated by excluding the lowest amplitude value and the highest amplitude value (S230).

When the average amplitude value for each user is calculated for the EMG signal up to the nth time, it is determined whether the user is drowsy by comparing the average amplitude value with the current amplitude value at the n+1th time (S240).

If the current amplitude value is greater than the average amplitude value, muscle relaxation is not performed, and the muscle activity is high, so it is determined as normal operation, and the current amplitude value is stored in the general operation database (S250).

If the current amplitude value is smaller than the average amplitude value, muscle relaxation is achieved, and the muscle activity is low, so it is determined as drowsiness, and the current amplitude value is stored in the drowsiness database (S260).

At this time, it is determined whether the electric massage signal is output before the current time, that is, before the n+1 hour corresponding to the current time, and if the electric massage signal is not output at the previous time, the user's muscle is stimulated. In order to give an electric massage signal to the first electric stimulation level by controlling the electrode pad interlocking with the surface electromyography sensor (S270 and S280).

When the electric massage signal is output, the first electric stimulation level for the electric massage signal is stored in the electric stimulation level database in association with the n+1 time (S285).

If the electric massage signal is output at the nth time, which is before the n+1th hour corresponding to the current time, the electric massage signal is output by increasing the electric stimulation level stored in the electric stimulation level database (S270, S290, S280).

That is, after outputting the electric massage signal to the first electrical stimulation level at the n-th time and continuously outputting the electrical massage signal at the n+1 time, since the user is maintaining a drowsy state, it is higher than the first electrical stimulation level. An electric massage signal is output at the second electric stimulation level of high intensity.

Thereafter, the second electrical stimulation level for the electrical massage signal is stored in the electrical stimulation level database in association with the n+1 time (S285).

Although the above has been described with reference to one embodiment of the present invention, those of ordinary skill in the art may change the present invention in various ways within the scope not departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that modifications and variations are possible.

Claims

A main body comprising: a first adhesive part covering both shoulders of the user; and a second adhesive part extending from the first adhesive part to the trapezius region;

an electrode pad including a first electrode portion disposed in the first contact portion and providing electrical stimulation to the shoulder, and a second electrode portion disposed in the second contact portion and providing electrical stimulation to the trapezius muscle;

an EMG sensor disposed in the second adhesion portion and generating an EMG signal according to muscle contraction or relaxation of the trapezius muscle; and

and a controller for estimating a change in the user's posture according to the EMG signal, and outputting an electric massage signal through the electrode pad when the user's drowsiness state is determined from the estimated value

An anti-drowsiness massage device using a surface electromyography sensor.
According to claim 1,

The first adhesion part is made of a soft material that can maintain a curved state after being curved according to the user's shoulder body shape,

The second adhesion part is made of a soft material that can maintain the bent state after being bent along the spine line in accordance with the user's back body type.

An anti-drowsiness massage device using a surface electromyography sensor.
According to claim 1,

The controller is

Classifying a plurality of stages of drowsiness according to the estimated posture change, and outputting a massage electric signal of a preset massage mode according to the current drowsiness state to the electrode pad

An anti-drowsiness massage device using a surface electromyography sensor.
4. The method of claim 3,

The first electrode part and the second electrode part include a plurality of electrode pads,

The controller operates in any one of a first mode, a second mode, and a third mode according to the current drowsiness state,

In the first mode, a massage electric signal is output in a rolling massage pattern to the shoulder and trapezius through the plurality of electrode pads, and in the second mode, an electric massage signal is output in a cross pattern to the shoulder and the trapezius muscle, and the third In this mode, a massage electric signal is output to stimulate the shoulder and trapezius muscles from weak to strong.

An anti-drowsiness massage device using a surface electromyography sensor.
According to claim 1,

the controller is

Using the EMG sensor, it monitors whether the first electrode part and the user's shoulder and whether the second electrode part and the user's trapezius are in contact, and when the contact strength is less than a reference value, the first electrode part and the second electrode part It outputs a massage electric signal with a preset maximum intensity through the 2 electrode part.

An anti-drowsiness massage device using a surface electromyography sensor.
According to claim 1,

The second electrode part is formed to protrude so that the position corresponding to the user's great hypovolemia has a cusp.

An anti-drowsiness massage device using a surface electromyography sensor.
A method for determining drowsiness using a surface electromyogram sensor that is in close contact with a user's body muscles, the method comprising:

measuring an EMG signal according to muscle contraction or relaxation of a muscle through the surface EMG sensor;

removing at least one of electrical noise included in the EMG signal, environmental electromagnetic noise, and dynamic noise by applying a noise removal filter; and

calculating an average amplitude value for each user with respect to the EMG signal up to the nth time from which the noise is removed, and determining whether the user is drowsy by comparing the average amplitude value with the current amplitude value at the n+1th time; containing

A personalized drowsiness judgment method using a surface electromyography sensor.
8. The method of claim 7,

The step of removing the noise is

A Butterworth filter is used to remove electrical noise included in the EMG signal, and an Elliptic filter is used to remove ambient environmental electromagnetic noise included in the EMG signal, and a Chebyshev filter ( Chebyshev filter), characterized in that the dynamic noise included in the EMG signal is removed

A personalized drowsiness judgment method using a surface electromyography sensor.
8. The method of claim 7,

The step of determining whether the user is drowsy

performing normalization based on MVC (Maximum Voluntary Contraction) on the EMG signal up to the n-th time from which the noise is removed; and

calculating an average amplitude value by excluding the lowest amplitude value and the highest amplitude value from the standardized EMG signal

A personalized drowsiness judgment method using a surface electromyography sensor.
8. The method of claim 7,

The step of determining whether the user is drowsy

When the current amplitude value is greater than the average amplitude value, determining that the normal operation is normal, and storing the current amplitude value in the general operation database.

A personalized drowsiness judgment method using a surface electromyography sensor.
8. The method of claim 7,

The step of determining whether the user is drowsy

determining that the current amplitude value is smaller than the average amplitude value as drowsiness, and storing the current amplitude value in a drowsiness database;

A personalized drowsiness judgment method using a surface electromyography sensor.
8. The method of claim 7,

The method further comprising the step of outputting an electric massage signal by controlling the electrode pad interlocked with the surface electromyogram sensor according to whether the user is drowsy

A personalized drowsiness judgment method using a surface electromyography sensor.
13. The method of claim 12,

The step of outputting the electric massage signal is

and storing the electrical stimulation level for the output electric massage signal in association with the n+1 time.

A personalized drowsiness judgment method using a surface electromyography sensor.
14. The method of claim 13,

The step of outputting the electric massage signal is

After outputting the electric massage signal to the first electrical stimulation level at the n+1 time, when the electrical massage signal is continuously output at the n+2 time, the second electrical stimulation level with a higher intensity than the first electrical stimulation level outputting an electric massage signal to

A personalized drowsiness judgment method using a surface electromyography sensor.