A training belt and method for monitoring heart condition during breathing training

Abstract

The present application discloses a training belt and method for monitoring heart condition during breathing training, comprising a main unit and a pull cord. A pull cord wheel is provided in the main unit, one end of the pull cord is wound around the pull cord wheel and the other end is fixed to the main unit, the central rotating shaft of the pull cord wheel is fixed to the main unit, a spring is provided between the pull cord wheel and the central rotating shaft, and the spring provides a tightening torque to keep the pull cord in a taut state at all times; the main unit is also provided with a power supply, an angle sensor, a main control chip and a heart sound sensor; the pull cord is configured as a non-elastic pull cord, which is worn around the chest or abdomen of the human body to monitor changes in body contour caused by breathing, and an elastic band is provided between the pull cord and the human body; the heart sound sensor points to the chest cavity to measure heart sounds. The patient's heart sounds are measured, and the heart rate is obtained to evaluate the training effect, providing information for adjusting the intensity and time of breathing training; the breathing stage is divided into three stages, the noise caused by breathing is eliminated, and a cleaner heart sound signal is obtained throughout the process, providing a basis for adjusting the breathing training.

Description

Technical Field

[0001] The present application relates to a training belt and method for monitoring heart condition during breathing training, belonging to the field of auxiliary medical technology. Background Art

[0002] The purpose and significance of breathing training is mainly to enhance the function of the lungs and improve the ventilation and gas exchange functions of the lungs. Especially for pathological lung diseases, the main purpose is to restore normal respiratory function and improve the quality of life of patients. For example, for diseases such as asthmatic bronchitis and bronchial asthma, improving lung function can reduce the residual air volume in the lungs, increase ventilation and gas exchange volume, improve vital capacity, and can relieve symptoms of wheezing, shortness of breath, chest tightness, and shortness of breath. It can also reduce the frequency of symptoms and enhance the resistance of the lungs themselves. It is very beneficial to the disease and can improve the quality of life of patients without affecting their personal work and life.

[0003] Currently, commonly used breathing training methods include abdominal weight load method or the use of breathing training equipment. During training with these methods, patients can only judge the training effect based on their own feelings. There are no scientific training parameters to measure the training effect, and there are no relevant prompts to remind patients to strengthen training when the training effect is poor. Ultimately, the breathing training effect is poor, and patients lose perseverance and confidence in breathing training. Summary of the Invention

[0004] The technical problem to be solved by this application is how to evaluate the training effect and provide breathing training guidance to patients through heart condition monitoring while they are undergoing breathing training.

[0005] In order to solve the above technical problems, the technical solution of the present application is to provide a training belt for monitoring heart condition during breathing training, which is characterized in that it includes a main unit and a pull wire, a pull wire wheel is provided in the main unit, one end of the pull wire is wound around the pull wire wheel, and the other end is fixed to the main unit, the central rotating shaft of the pull wire wheel is fixed to the main unit, and a clockwork spring is provided between the pull wire wheel and the central rotating shaft, and the clockwork spring provides a tightening torque to keep the pull wire in a taut state at all times; the main unit is also provided with a power supply, an angle sensor, a main control chip and a heart sound sensor; the pull wire is set as a non-elastic pull wire, which is worn around the human chest or abdomen to monitor changes in body contour caused by breathing, and an elastic band is provided between the pull wire and the human body; the heart sound sensor points to the chest cavity to measure heart sounds.

[0006] Preferably, the main control chip is connected to a display screen or a voice speaker.

[0007] Preferably, the clockwork spring is configured as a flat spiral spring, which generates a retracting tightening torque on the pulling wheel when the pulling wire is pulled out, thereby keeping the pulling wire taut at all times.

[0008] Preferably, a plurality of wire limiting sleeves are arranged at intervals on the elastic band, the wire passing through the wire limiting sleeves, and the wire limiting sleeves limit the wire to the elastic band.

[0009] Preferably, the width of the elastic band is not narrower than 20 mm.

[0010] The present application also provides a method for monitoring heart condition during breathing training, using the above-mentioned training belt.

[0011] The specific steps include:

[0012] Step 1: Use the angle sensor of the training belt to determine the different stages of breathing and breathing intensity;

[0013] Step 2: Collect heart sounds during the breathing process, and transform the heart sound signals from the time domain to the frequency domain (Fourier method or wavelet transform, etc. can be used). In the transformed spectrum, compare it with the respiratory monitoring data, and look for signals between 300Hz-1000Hz and lasting more than 0.5 seconds in the inhalation and exhalation stages, and remove them. Compare the removed signals with the signals in the breath-holding stage. Mainly compare short-term signals (less than 0.5 seconds) below 100Hz. If they are basically consistent within the heartbeat cycle, it can be considered that continuous heart sounds have been collected and purified. If the consistency is not good, only the heart sounds in the breath-holding stage are intercepted as valid heart sounds, and the heart sounds in the exhalation and inhalation stages are kept for reference. This signal is useful for medical research and is retained independently;

[0014] Step 3: Reuse the original acquired heart sound signal and remove the heart sounds obtained in step 2. This process can be performed using direct signal subtraction or by directly removing the frequencies corresponding to the heart sounds in the frequency domain. This produces cleaner respiratory sounds, which facilitates subsequent respiratory status assessment.

[0015] Step 4: Use the heart sounds obtained in step 2 to infer the sounds of the heart valves and large blood vessels under the impact of blood flow; compare the heart sounds in the resting state and during breathing training. If noise occurs during large-scale breathing, it indicates that the heart condition may be abnormal, and adjustments should be made to the breathing training: pause the training or reduce the training intensity.

[0016] Among them, in step one, the angle sensor of the training belt is used to judge the different stages of breathing and breathing intensity, specifically: the rotation information obtained by measuring the angle sensor is used to judge whether the wire pulling wheel is rotating forward to pay out the wire or rotating backward to take up the wire, the forward rotation of paying out the wire represents that the training belt is expanding, corresponding to the inhalation stage, the reverse rotation of taking up the wire represents that the training belt is contracting, corresponding to the exhalation stage, and the wire pulling wheel stops rotating, which represents that the training belt is stagnant, corresponding to the breath holding stage; during the exhalation and inhalation process, the retraction and extension of the wire is converted into the rotation angle of the wire pulling wheel, which is measured and collected by the angle sensor, and the retraction and extension length of the wire is obtained by converting the rotation angle of the wire pulling wheel, thereby obtaining the change in the user's body width during the exhalation and inhalation process, and the maximum retraction and extension length of the wire of the user during the exhalation and inhalation process represents the breathing intensity.

[0017] Preferably, when using the training belt for breathing training, the user's heart rate is obtained at the same time. The fluctuation of the heart rate during the entire breathing process is used to guide the breathing training. If the fluctuation is lower than the reference value, it means that the user's breathing training is not in place and the intensity of the breathing training needs to be increased.

[0018] Specifically, the heart rate is obtained from the fluctuation of the heart sound signal, or the training belt is used in conjunction with an electrocardiogram monitor or a blood oximeter, and the heart rate is obtained from the electrocardiogram signal or the blood oxygen pulsation signal.

[0019] The advantages of this application are that, on the one hand, it can measure the patient's heart sounds and obtain the heart rate, evaluate the training effect while the patient is undergoing breathing training, and provide information for adjusting the intensity and time of breathing training; on the other hand, by dividing the breathing stage into three stages, the noise caused by breathing is eliminated, and a cleaner heart sound signal is obtained throughout the process, providing a basis for adjusting the breathing training. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the training belt structure for monitoring heart condition during breathing training provided in an embodiment;

[0021] Figure 2 Schematic diagram of the internal structure of a training belt for monitoring heart condition during breathing training provided in an embodiment;

[0022] Figure 3 This is a framework diagram of a training belt system for monitoring heart condition during breathing training provided in an embodiment. DETAILED DESCRIPTION

[0023] In order to make the present application more clear and easy to understand, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0024] This embodiment provides a training belt for monitoring heart condition during breathing training. Figure 1 - Figure 3, including a host 1 and a pull wire 2. A pull wire wheel 3 is provided in the host 1. One end of the pull wire 2 is wound around the pull wire wheel 3 and the other end is fixed to the host 1. The central rotating shaft of the pull wire wheel 3 is fixed to the host 1. A clockwork spring 4 is provided between the pull wire wheel 3 and the central rotating shaft. The clockwork spring 4 provides a tightening torque to keep the pull wire 2 in a taut state at all times. The host 1 is also provided with a power supply, an angle sensor 5, a main control chip and a heart sound sensor 7; the pull wire 2 is an inelastic thin wire, which is worn around the human chest or abdomen. Breathing causes changes in the body contour, and the pull wire 2 drives the pull wire wheel 3 to rotate as the body contour changes; the main control chip is also connected to a display screen or a voice speaker to prompt the user.

[0025] In a possible implementation, the clockwork spring 4 is preferably a flat spiral spring, whose function is to generate a retracting tightening torque on the wire pulley 3 when the wire 2 on the wire pulley 3 is pulled out. Because of the existence of this tightening torque, the wire 2 can be kept taut at all times. The mechanism formed by the wire 2, the wire pulley 3, and the clockwork spring 4 converts the length change of the wire 2 outside the main unit 1 into the rotation angle of the wire pulley 3. Since the wire 2 is always taut, the length change of the wire 2 outside the main unit 1 is completely consistent with the body contour changes caused by human breathing; therefore, the body contour changes caused by breathing are converted into angle changes of the wire pulley 3. The angle sensor 5 is coaxially fixed to the wire pulley 3, and the angle sensor 5 is used to measure the rotation angle of the wire pulley 3. In a possible implementation, the angle sensor 5 is preferably a rotary potentiometer that can rotate back and forth an unlimited number of times; the rotary potentiometer can rotate back and forth an unlimited number of times, has a large range, and can greatly reduce the size of the main unit. The rotation information measured by the angle sensor 5 is collected by the main control chip.

[0026] An elastic band 6 is provided between the pull wire 2 and the human body, and a plurality of pull wire limiting sleeves 61 are provided at intervals on the elastic band 6. The pull wire 2 passes through the pull wire limiting sleeve 61, and the pull wire limiting sleeve 61 limits the pull wire 2 on the elastic band 6 to prevent the pull wire 2 from detaching. The provision of the elastic band 6 prevents the pull wire 2 from directly contacting the human body, thereby improving the user experience. In a preferred implementation, the elastic band 6 is the part that is in direct contact with the human body, and the width of the elastic band 6 should not be narrower than 20 mm, preferably between 50 mm and 100 mm.

[0027] During breathing training, the angle sensor 5 of the training belt can be used to determine the different stages of breathing and breathing intensity, which correspond to the inhalation stage, the breath-holding stage and the exhalation stage. Specifically, to determine whether the training belt is expanding or contracting, the rotation information measured by the angle sensor 5 can be used to determine whether the wire pulley 3 is rotating forward to pay out the wire or reversely to reel in the wire. Forward rotation to pay out the wire represents that the training belt is expanding, that is, in the inhalation stage, and reverse rotation to reel in the wire represents that the training belt is contracting, that is, in the exhalation stage. The cessation of rotation of the wire pulley 3 represents that the training belt is stagnant, that is, in the breath-holding stage. At the same time, during the inhalation and exhalation process, the retraction and extension of the wire 2 is converted into the rotation angle of the wire pulley 3, which is measured and collected by the angle sensor 5. Using the diameter of the wire pulley 3, the corresponding relationship between the rotation angle and the retraction and extension length of the wire 2 can be obtained, and the retraction and extension length of the wire 2 can be converted by the rotation angle of the wire pulley 3, thereby obtaining the change in the user's body width during the inhalation and exhalation process. The maximum retraction and extension length of the wire 2 of the user during the inhalation and exhalation process represents the breathing intensity.

[0028] Heart sound sensor 7 typically uses a directional sound sensor, known in the medical field as a heart sound sensor. This embodiment prefers a reusable ECG and heart sound sensor that can be connected to the main control chip, such as models REF30055, REF30083, REF30071, and REF30072. The sound pickup angle of heart sound sensor 7 is generally between 120 and 150 degrees, but should not be less than 90 degrees. An angle that is too small can miss sounds emitted by abnormal large blood vessels. The rear side of the sensor is covered with a layer of reflective material, which is usually included with the sensor, followed by a layer of sound-absorbing material to eliminate the influence of external noise. Heart sound sensor 7 is mounted on host 1, pointing toward the chest cavity.

[0029] While using the above-mentioned training belt for breathing training, it is also necessary to measure heart rate and heart sounds in order to monitor heart condition during breathing training. Among them, heart sounds are measured using a heart sound sensor 7. The heart rate can be measured using the following method: when this training belt is used in conjunction with an electrocardiogram monitor or a blood oximeter, the heart rate is obtained from the electrocardiogram signal or the pulsation signal of blood oxygen. When this training belt is used alone, it is obtained from the fluctuation of the heart sound signal.

[0030] Specifically, the method of monitoring heart condition during breathing training is as follows:

[0031] Step 1: Use the angle sensor 5 of the training belt to determine the different stages of breathing and breathing intensity;

[0032] Step 2: Collect heart sounds during the breathing process, and transform the heart sound signals from the time domain to the frequency domain (Fourier method or wavelet transform, etc. can be used). In the transformed spectrum, compare it with the respiratory monitoring data, and look for signals between 300Hz-1000Hz and lasting more than 0.5 seconds in the inhalation and exhalation stages, and remove them. Compare the removed signals with the signals in the breath-holding stage. Mainly compare short-term signals (less than 0.5 seconds) below 100Hz. If they are basically consistent within the heartbeat cycle, it can be considered that continuous heart sounds have been collected and purified. If the consistency is not good, only the heart sounds in the breath-holding stage are intercepted as valid heart sounds, and the heart sounds in the exhalation and inhalation stages are kept for reference. This signal is useful for medical research and is retained independently;

[0033] Step 3: Reuse the original acquired heart sound signal and remove the heart sounds obtained in step 2. This process can be performed using direct signal subtraction or by directly removing the frequencies corresponding to the heart sounds in the frequency domain. This produces cleaner respiratory sounds, which facilitates subsequent respiratory status assessment.

[0034] Step 4: Use the heart sounds obtained in step 2 to infer the sounds of the heart valves and large blood vessels under the impact of blood flow; compare the heart sounds in the resting state and during breathing training. If noise occurs during large-scale breathing, it indicates that the heart condition may be abnormal, and adjustments should be made to the breathing training: pause the training or reduce the training intensity.

[0035] Priority is given to analyzing heart sounds during the breath-holding phase, as the chest and lungs are expanded, making the heart and blood vessels easier to observe. Priority is given to analyzing heart rate during a large inhale and the few seconds that follow. Due to the influence of the nervous system, the heart rate during this phase should be at its highest. The fluctuations in heart rate throughout the breathing process serve as a guide for breathing training. If the fluctuation is below the reference value (assigned by a doctor based on experience), it indicates that the user's breathing training is inadequate and the intensity of the training can be increased.

[0036] If used in conjunction with an ECG monitor or a blood oximeter, ECG or blood oxygen information can be collected and analyzed as separate heart condition information.

[0037] Through the above method, the training belt provided in this embodiment can be used to simultaneously monitor heart rate and some lung breathing sounds during breathing training, providing a very effective auxiliary role in breathing training, providing more data for breathing training evaluation, and also allowing for a more comprehensive observation of the user's physical condition. If positive changes in heart rate are observed, a prompt can be provided to proceed to further breathing training. If abnormal heart condition occurs during training, such as rapid changes in heart rate or the presence of heart sounds, it is necessary to slow down or even pause the breathing training.

[0038] The training belt provided in this embodiment is portable and non-invasive. It can monitor heart activity during breathing training and provide information for adjusting the intensity and duration of breathing training. The method provided in this embodiment can eliminate the noise caused by breathing and obtain a cleaner heart sound signal throughout the process, providing a basis for adjusting breathing training.

Claims

1. A method for monitoring heart condition during breathing training, characterized in that: A training belt is used, which includes a main unit (1) and a pull wire (2). A pull wire wheel (3) is provided in the main unit (1), one end of the pull wire (2) is wound around the pull wire wheel (3) and the other end is fixed to the main unit (1), the central rotating shaft of the pull wire wheel (3) is fixed to the main unit (1), a spring spring (4) is provided between the pull wire wheel (3) and the central rotating shaft, and the spring spring (4) provides a tightening torque to keep the pull wire (2) in a taut state at all times; a power supply, an angle sensor (5), a main control chip and a heart sound sensor (7) are also provided in the main unit (1); the pull wire (2) is set as a non-elastic pull wire, which is worn around the chest or abdomen of the human body to monitor the changes in body contour caused by breathing, and an elastic belt (6) is provided between the pull wire (2) and the human body; the heart sound sensor (7) points to the chest cavity to measure heart sounds; the method includes the following steps: Step 1: Use the angle sensor of the training belt to determine the different stages of breathing and breathing intensity; Step 2: Collect heart sounds during breathing and transform the heart sound signal from the time domain to the frequency domain. In the transformed spectrum, search for signals between 300Hz and 1000Hz with a duration of more than 0.5 seconds during the inhalation and exhalation phases and remove them. Compare the removed signals with the signals during the breath-holding phase. Compare short-term signals below 100Hz. If they are basically consistent within the heartbeat cycle, it can be considered that continuous heart sounds have been collected and purified. If the consistency is not good, only the heart sounds during the breath-holding phase are intercepted as valid heart sounds, and the heart sounds during the exhalation and inhalation phases are retained for reference. Step 3: Reusing the originally collected heart sound signal, removing the heart sound obtained in step 2 from the original heart sound signal to obtain relatively clean respiratory sounds; Step 4: Use the heart sounds obtained in step 2 to infer the sounds of the heart valves and large blood vessels under the impact of blood flow; compare the heart sounds in the resting state and during breathing training. If noise occurs during large-scale breathing, it indicates that the heart condition may be abnormal, and adjustments should be made to the breathing training: pause the training or reduce the training intensity.

2. The method for monitoring heart condition during breathing training according to claim 1, wherein: The main control chip is connected to a display screen or a voice speaker.

3. The method for monitoring heart condition during breathing training according to claim 1, wherein: The clockwork spring (4) is configured as a plane spiral spring, and when the pulling wire (2) on the pulling wire wheel (3) is pulled out, a retracting tightening torque is generated on the pulling wire wheel (3), thereby keeping the pulling wire (2) taut at all times.

4. The method for monitoring heart condition during breathing training according to claim 1, wherein: A plurality of wire limiting sleeves (61) are arranged at intervals on the elastic band (6); the wire (2) passes through the wire limiting sleeves (61); and the wire limiting sleeves (61) limit the wire (2) on the elastic band (6).

5. A method for monitoring heart condition during breathing training as claimed in claim 4, characterized in that: The width of the elastic band (6) is not narrower than 20 mm.

6. The method for monitoring heart condition during breathing training according to claim 1, characterized in that: In the step 1, the angle sensor of the training belt is used to judge the different stages of breathing and the breathing intensity, specifically: the rotation information obtained by measuring the angle sensor (5) is used to judge whether the wire pulley (3) is rotating in the forward direction to release the wire or rotating in the reverse direction to reel in the wire, the forward rotation to release the wire represents that the training belt is expanding, corresponding to the inhalation stage, the reverse rotation to reel in the wire represents that the training belt is contracting, corresponding to the exhalation stage, and the stopping of the rotation of the wire pulley (3) represents that the training belt is stagnant, corresponding to the breath holding stage; during the exhalation and inhalation process, the retraction and extension of the wire (2) is converted into the rotation angle of the wire pulley (3), which is then measured and collected by the angle sensor (5), and the retraction and extension length of the wire (2) is obtained by converting the rotation angle of the wire pulley (3), thereby obtaining the body width change of the user during the exhalation and inhalation process, and the maximum retraction and extension length of the wire (2) of the user during the exhalation and inhalation process represents the breathing intensity.

7. The method for monitoring heart condition during breathing training according to claim 1, characterized in that: When using the training belt for breathing training, the user's heart rate is obtained at the same time. The fluctuation of the heart rate during the entire breathing process is used to guide the breathing training. If the fluctuation is lower than the reference value, it means that the user's breathing training is not in place and the intensity of the breathing training needs to be increased.

8. The method for monitoring heart condition during breathing training according to claim 7, characterized in that: The heart rate is obtained from the fluctuation of the heart sound signal, or the training belt is used in conjunction with an electrocardiogram monitor or a blood oximeter, and the heart rate is obtained from the electrocardiogram signal or the blood oxygen pulsation signal.

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