KR102220150B1 - Respiratory sensing device and respiratory monitoring system - Google Patents

Abstract

The present invention is a respiratory monitoring system that is attached to the patient's body and acquires information on the patient's breathing state by sensing vibrations generated by the patient's breathing using a piezoelectric effect. A first breathing sensing device that is a breathing sensing device attached to a first point of the neck of the patient to which a vibration signal according to breathing is applied; A second breath sensing device that is the breath sensing device attached to a second point different from the first point; And a signal processing module for processing a first electrical signal generated from the first breathing sensing device and a second electrical signal generated from the second breathing sensing device, including, the first breathing sensing device and the second breathing The sensing device, wherein the first breathing sensing device uses the patient's body as a ground through the first point with respect to the first electrical signal, and the second breath sensing device uses the second breathing sensing device as a ground with respect to the second electrical signal. By using the patient's body as a ground through a point, it may be characterized in that the patient's body is shared as the ground.

Description

Breath sensing device and breath monitoring system including the same {RESPIRATORY SENSING DEVICE AND RESPIRATORY MONITORING SYSTEM}

The present invention relates to a breathing sensing device and a breathing monitoring system including the same, and more particularly, to a breathing sensing device for sensing the breathing of a patient using a piezoelectric material, and a breathing monitoring system including the same.

Recently, there has been increasing efforts to implement effective treatment by implementing the sedation method to relieve the patient's tension and minimize anxiety and fear. These sedation methods can be divided into oral sedation, inhalation sedation, and intravenous sedation, depending on the implementation method, and can be divided into general conscious sedation and deep sedation depending on the depth of sedation. However, when the consciousness suppression state is induced by the sedation method, physical abilities such as the ability to independently secure the trachea may be significantly deteriorated because the patient is not aware of the clinical stimulus or can only respond to a minimum. . Therefore, active patient monitoring is required to implement stable sedation, and in particular, monitoring the patient's breathing status is a very important part that is directly connected to the success rate of surgery and the patient's life.

Examples of respiratory depression monitoring methods to resolve this include pulse oximetry using oxygen saturation, ventilation monitoring using carbon dioxide partial pressure or organ auscultation, and circulation monitoring using blood pressure or electrocardiogram. I can.

However, the conventional breathing monitoring method involves problems such as a complicated mechanical structure of a device for performing this, it is difficult to operate, is easily affected by ambient noise, and is very expensive. Accordingly, there is a need for a new type of breathing monitoring device that has a high Signal to Noise Ratio (SNR) and is simple to use and structure.

A problem to be solved according to an embodiment is to provide a breathing sensing device and a breathing monitoring system in which interference by electrical biological signals generated from a patient's body such as ECG (electrocardiogram) or EMG (electromyogram) is minimized.

Another object to be solved according to an embodiment is to provide a breathing sensing device and a breathing monitoring system having a structure in which an electrode of a piezoelectric film is easily grounded.

The problem to be solved according to another embodiment is to facilitate the vibration transmission path from the patient's body to the piezoelectric film without a strap member or an acoustic coupler for the piezoelectric film in close contact with the patient's body. It is to provide a breathing sensing device and a breathing monitoring system formed.

Another problem to be solved according to an embodiment is to provide a breathing sensing device and a breathing monitoring system that minimizes the influence of external vibrations, etc. that occur due to a patient's tossing and other factors other than breathing.

Another problem to be solved according to an embodiment is to provide a breathing sensing device and a breathing monitoring system capable of grasping the type of breathing of a patient.

The breathing monitoring system according to an embodiment includes a first breathing sensing device that is a breathing sensing device attached to a first point of the neck of the patient to which a vibration signal according to the patient's breathing is applied, and at a second point different from the first point. A second breathing sensing device that is the attached breathing sensing device, and a signal processing module that processes a first electrical signal generated from the first breathing sensing device and a second electrical signal generated from the second breathing sensing device, The first breathing sensing device and the second breathing sensing device, wherein the first breathing sensing device uses the patient's body as a ground through the first point with respect to the first electrical signal, and the second breathing sensing device The second electrical signal may be characterized in that the patient's body is shared as the ground by using the patient's body as a ground through the second point.

According to another embodiment, the breathing type determination method of the breathing monitoring system includes a first electrical signal including the breathing information generated from the first breathing sensing device and the breathing information generated from the second breathing sensing device. Acquiring a second electrical signal, determining a difference between the detection timing of the breath included in the first electrical signal and the second electrical signal, and the first electrical signal based on the difference between the determined detection timing And determining the type of the second electric signal, wherein the first electric signal and the type of the second electric signal may be signals other than an inhalation signal, an exhalation signal, and a respiration signal.

The solution means of the problem of the present invention is not limited to the above-described solution means, and solutions that are not mentioned will be clearly understood by those of ordinary skill in the art from the present specification and the accompanying drawings. I will be able to.

According to the present invention, by providing an insulating film between the piezoelectric film and the patient's body, it is possible to remove noise from the respiration signal by minimizing interference of the electrical biosignal generated from the patient's body with the piezoelectric film.

In addition, according to the present invention, since the through hole of the insulating film electrically connects the lower electrode of the piezoelectric film and the conductive adhesive layer, the lower electrode is grounded to the patient's body to remove noise from the breathing signal.

In addition, according to the present invention, as the piezoelectric film is provided in a gel form having fluidity, it is connected to the patient's body through an adhesive layer that is adhered in close contact with the patient's body part, so that the vibration generated in the patient's body part is well protected by the piezoelectric film. Can be delivered.

In addition, according to the present invention, the adhesive layer provided in the form of a gel performs the function of a band-pass filter for vibrations generated in the patient's body part, thereby minimizing noise.

The effects of the present invention are not limited to the above-described effects, and effects that are not mentioned will be clearly understood by those of ordinary skill in the art from the present specification and the accompanying drawings.

1 is a schematic diagram of a breathing monitoring system according to an embodiment.
2 is a view showing a state of use of a breath sensing device according to an embodiment.
3 is a block diagram of a configuration of a breath sensing device according to an embodiment.
4 is a perspective view of a breath sensing device according to an embodiment.
5 is an exploded perspective view of a breath sensing device according to an embodiment.
6 is a side cross-sectional view of a breath sensing device according to an embodiment.
7 is an exploded side cross-sectional view of a breath sensing device according to an embodiment.
8 is a block diagram showing the configuration of a breathing monitoring system according to an embodiment.
9 is a schematic diagram of a breathing monitoring system according to an embodiment.
10 is a view showing a state of use of a breath sensing device according to an embodiment.
11 is a view showing the operation of the breathing monitoring system when the patient breathes in.
12 is a diagram showing the operation of the breathing monitoring system when the patient exhales.
13 is a view showing an electrical signal during one breathing cycle of the breathing monitoring system attached according to FIG. 9
14 is a view showing a flow chart of the operation of the breathing monitoring system according to an embodiment.
15 is a schematic diagram of a breathing monitoring system according to an embodiment.
FIG. 16 is a diagram illustrating an electrical signal during one breathing cycle of a patient with a breathing sensing device attached according to FIG. 15.
17 is a view showing a flow chart of the operation of the breathing monitoring system according to an embodiment.

The embodiments described in the present specification are intended to clearly explain the spirit of the present invention to those of ordinary skill in the technical field to which the present invention belongs, and thus the present invention is not limited to the embodiments described in the present specification. The scope should be construed as including modifications or variations that do not depart from the spirit of the present invention.

The terms used in this specification have been selected as general terms that are currently widely used in consideration of functions in the present invention, but this varies depending on the intention of a person of ordinary skill in the art, precedents, or the emergence of new technologies. I can. However, if a specific term is defined and used in an arbitrary meaning unlike this, the meaning of the term will be separately described. Therefore, the terms used in the present specification should be interpreted based on the actual meaning of the term and the entire contents of the present specification, not a simple name of the term.

The drawings attached to the present specification are for easy explanation of the present invention, and the shapes shown in the drawings may be exaggerated and displayed as necessary to aid understanding of the present invention, so the present invention is not limited by the drawings.

In the present specification, when it is determined that a detailed description of a well-known configuration or function related to the present invention may obscure the subject matter of the present invention, a detailed description thereof will be omitted as necessary.

According to an embodiment, as a respiratory sensing system attached to the patient's body and acquiring information on the patient's breathing state by sensing vibrations generated by the patient's breathing using a piezoelectric effect. , A first breathing sensing device that is a breathing sensing device attached to a first point of the neck of the patient to which a vibration signal according to the patient's breathing is applied, and the breathing sensing device that is attached to a second point that is different from the first point. 2 a breathing sensing device and a signal processing module for processing a first electrical signal generated from the first breathing sensing device and a second electrical signal generated from the second breathing sensing device, the first breathing sensing device and the The second breathing sensing device, wherein the first breathing sensing device uses the patient's body as a ground through the first point with respect to the first electrical signal, and the second breathing sensing device is configured with respect to the second electrical signal. By using the patient's body as a ground through the second point, a breathing monitoring system may be provided that shares the patient's body as a ground.

Here, the breathing sensing device includes a piezoelectric material in the form of a thin film, an upper electrode positioned above the piezoelectric material with the piezoelectric material interposed therebetween, and a lower electrode positioned below the piezoelectric material. And a piezoelectric film for generating electrical signals to the upper electrode and the lower electrode according to vibration generated by breathing, wherein the first breathing sensing device comprises: a lower electrode of the first breathing sensing device is electrically connected to the first point. When connected to, the patient's body is used as a ground, and the second breath sensing device uses the patient's body as a ground as the lower electrode of the second breath sensing device is electrically connected to the second point. I can.

Here, each of the breathing sensing devices is positioned at the bottom of the piezoelectric film to face the lower electrode, is provided with an adhesive material, is attached in contact with the body of the patient, and generates vibrations caused by the breathing of the patient. An adhesive layer capable of electrically connecting the upper and lower surfaces of the film and the conductive film, and interposed between the piezoelectric film and the adhesive layer, and blocking the electrical connection between the piezoelectric film and the adhesive layer, and preventing the piezoelectric phenomenon. In order to reduce the noise of the electrical signal, an insulating layer may be formed in which through-holes are formed to electrically connect the lower electrode and the adhesive layer to each other so that the lower electrode is grounded to the patient's body through the adhesive layer.

Here, the signal processing module may be installed in a monitoring device that displays information on the patient's breathing state based on a result of the signal processing module.

Here, the signal processing module may be installed in any one of the first breathing sensing device and the second breathing sensing device.

Here, the first breathing sensing device and the second breathing sensing device are attached to the patient's body along a movement path of breath during breathing, and the signal processing module is a detection point of breathing according to the first electrical signal. And it is possible to determine the type of respiration based on the relationship between the detection time point of the breath according to the second electrical signal.

Here, the second breathing sensing device is installed at a second point of the neck of the patient close to the head of the patient from the first point, and the signal processing module is a time point of detecting breathing according to the first electrical signal If this is earlier than the detection time of respiration according to the second electrical signal, the type of respiration is determined as exhalation, and the detection time of respiration according to the second electrical signal is earlier than the detection time of respiration according to the first electrical signal. If the type of breathing is judged by inhalation

Here, in the signal processing module, a time difference between the detection time point of breathing according to the first electrical signal and the detection time point of breathing according to the second electrical signal is a separation between the first breathing sensing device and the second breathing sensing device. In order to further select a predetermined time range corresponding to the interval, the type of respiration may be determined based on a relationship between the detection time point of respiration according to the first electrical signal and the detection time point of respiration according to the second electrical signal.

Here, the first breathing sensing device and the second breathing sensing device may be attached to the patient's body such that their longitudinal directions are perpendicular to the arrangement directions of the first breathing sensing device and the second breathing sensing device, respectively. .

Here, the second respiration sensing device is attached to a second point spaced apart from the neck rest of the patient by a predetermined distance or more, and the signal processing module receives the second electrical signal sharing a ground with the first electrical signal. Noise may be removed from the first electrical signal by correcting the first electrical signal by using.

According to another embodiment, there is provided a breathing sensing device attached to the patient's body and acquiring information about the patient's breathing by sensing vibrations generated by the patient's breathing using a piezoelectric effect. Including, and using a first breathing sensing device attached to the neck rest, which is far from the patient's head, and a second breathing sensing device attached to the neck rest, which is closer to the patient's head than the first breathing sensing device, to determine the type of breathing of the patient. As a method of determining, obtaining a first electrical signal including the breathing information generated from the first breathing sensing device and a second electrical signal including the breathing information generated from the second breathing sensing device, the Determining a difference between the detection timing of the breath included in the first electrical signal and the second electrical signal, and determining the types of the first electrical signal and the second electrical signal based on the determined difference between the detection timing Including the step, wherein the type of the first electrical signal and the second electrical signal may be provided with a method of determining the type of breathing, which is a signal other than an inhalation signal, an exhalation signal, and a breath.

Here, the determining of the type of the signal includes the first electrical signal and the second electrical signal when the sensing time of respiration according to the first electrical signal is earlier than the sensing time of respiration according to the second electrical signal. Is determined as an exhalation signal, and when the sensing time of respiration according to the second electrical signal is earlier than the sensing time of respiration according to the first electrical signal, the types of the first electrical signal and the second electrical signal are used as an inhalation signal. It can be characterized by judging.

Here, the determining of the type of the signal includes the first electrical signal and the first electrical signal and the first electrical signal when the difference between the sensing time of breathing according to the first electrical signal and the sensing time of breathing according to the second electrical signal is within a predetermined time. It may be characterized in that the type of the second electrical signal is determined as a signal other than respiration.

Hereinafter, a breathing monitoring system 100 according to an embodiment of the present specification will be described.

The breathing monitoring system 100 is a system for diagnosing the patient's breathing state by measuring vibrations according to the patient's breathing through the breathing sensing device 1000 attached to a part of the patient's body, and analyzing the measured vibrations. to be.

1 is a schematic diagram of a breathing monitoring system 100 according to an embodiment of the present invention.

Referring to FIG. 1, the breathing monitoring system 100 may include a breathing sensing device 1000 and a breathing monitoring device 120.

The breathing sensing device 1000 may be attached to a part of the body of the patient 1, such as an airway, to detect vibrations caused by breathing of the patient 1.

The attachment part 2 to which the breath sensing device 1000 is attached may be a place where movement occurs when breathing is repeated. For example, it may be a ribcage that reflects changes in the volume of the lungs and abdominal cavity during breathing, a wrist that can sense a pulse through a vein, a region of the ribcage in which the heart is located, or a throat. The breath sensing device 1000 may be preferably attached to the neck region as shown in FIG. 1. At this time, the breathing sensing device 1000 may more preferably be attached to an airway having a relatively large movement according to the breathing of the patient 1 among the neck region. Of course, it should be noted in advance that the attachment portion of the breathing sensing device 1000 is not limited to the above-described example.

The breath sensing device 1000 may generate an electrical signal according to a piezoelectric effect when vibration due to breathing occurs. The breath sensing device 1000 may transmit the electrical signal to the breath monitoring device 120. Here, the breath sensing device 1000 may process and transmit a signal generated according to the piezoelectric effect.

A detailed description of the breath sensing device 1000 will be described later.

The breathing monitoring device 120 may receive an electrical signal from the breathing sensing device 1000 and monitor the breathing state of the patient 1 by using this.

Specifically, the breathing monitoring device 120 may perform various algorithms for determining the breathing state from the electrical signal, or perform various pre-processing tasks including noise removal on the electrical signal to perform the algorithm. Based on the analysis result obtained according to the above-described process, the breathing monitoring device 120 may monitor the breathing state of the patient 1 by grasping it.

The electrical signal received by the breathing monitoring device 120 from the breathing sensing device 1000 may include components due to various vibrations that occur irrespective of the breathing of the patient 10. In this component, for example, there may be vibrations generated by an endoscope and surgical instruments that unintentionally touch the airway of the patient 100. Alternatively, the noise may be vibration generated when the patient 1 swallows. Alternatively, the noise may be vibration generated by the sudden movement of the patient 1.

As an example of the pre-treatment operation of the breathing monitoring device 120, there may be a noise filtering operation for removing components due to vibrations irrelevant to the above-described breathing from the electrical signal.

The information on the breathing state acquired by the breathing monitoring device 120 may be characteristics related to breathing, such as an apnea state, a snoring state, an expiratory flow rate, and a tidal volume. Furthermore, the breathing monitoring device 120 may diagnose the health status of the patient 1. For example, of the respiratory-related characteristics, abnormal signs or diseases, such as apnea duration lasting for a certain period of time (apnea), respiratory depression (hypopnea), or entering a state of Upper Airway Resistance Syndrome (UARS). Can be diagnosed.

The breathing monitoring device 120 may output information on the breathing state of the patient 1 to a user in real time or under certain conditions. For example, the breathing monitoring device 120 may be provided with an audiovisual information output means such as a display or a speaker, and visually display a breathing signal through this, or may provide information related to the breathing state to the user through the speaker aurally. .

In addition, the breathing monitoring device 120 may detect that an abnormality occurs in the health state of the patient 1 through the breathing state of the patient 1 and output an alarm related thereto. As an example, the breathing monitoring device 120 may provide an alarm to the user through a display or a speaker, when an abnormal breathing condition or apnea condition continues.

The breathing monitoring device 120 may be an information calculating device for performing the above-described functions. The breathing monitoring device 120 may be implemented as a computer or a similar device according to hardware or software or a combination thereof. The breathing monitoring device 120 may be an information processing device that stores and processes data in hardware, and may be provided in the form of a program or code for driving a circuit in software.

The breathing monitoring device 120 may be connected to one or more breathing sensing devices 1000 or other sensing devices (not shown) by wire or wirelessly (not shown). For example, each breathing sensing device 1000 may be attached to a different body part of the same patient 1, and another external device may be a Pluse oximeter. The breathing sensing device 1000 may independently process information received from the other breathing sensing device 1000 or an external device or may perform a related operation in association with each other.

Hereinafter, a breath sensing device 1000 according to an embodiment of the present specification will be described in more detail.

2 is a view showing a state of use of the breath sensing device 1000 according to an embodiment of the present invention.

The breath sensing device 1000 may be attached to a body part of the patient 1 that generates vibration by breathing. Hereinafter, the body part of the patient 1 to which the breath sensing device 1000 is attached will be referred to as an'attachment part' (2).

Referring to FIG. 2, the attachment site 2 may be a crow's feet bone. The crow's feet bone is a component of the lower respiratory tract and is an area where minute vibrations occur as inhalation and exhalation pass during breathing. Therefore, the breathing sensing device 1000 may measure vibrations and movements generated during breathing by being attached to the crow's feet. However, in FIG. 2, the attachment site 2 is shown as being a crow's feet bone, but it should be noted in advance that the attachment site 2 is not limited to a crow's feet bone in the present invention.

The breath sensing device 1000 may have various shapes. For example, as shown in FIG. 2, the breath sensing device 1000 may have a rectangular shape as a whole.

The breathing sensing device 1000 may be attached in a form capable of most effectively measuring movement according to breathing in consideration of the shape of the crow's feet bone. For example, the breathing sensing device 1000 may be positioned on the crow bone so that the long side of the rectangle faces the horizontal direction. The breath sensing device 1000 may be attached so that its long side is wrapped around the circumference of the crow's feet. In this case, the cryodaebone may be located in the center of the long side of the breathing sensing device 1000, or the cryodaebone may be located in a portion that is skewed toward one side of the breathing sensing device 1000.

At one side of the breathing sensing device 1000, a cable for transmitting an electrical signal generated by vibration to the breathing monitoring device 120 may be extended. In this case, the cable may extend in the opposite direction of the crow's feet without crossing the crow's feet so as not to generate noise.

Hereinafter, a configuration of the breath sensing device 1000 according to an embodiment of the present specification will be described.

3 is a block diagram of the configuration of the breath sensing device 1000 according to an embodiment of the present invention.

Referring to FIG. 3, the breathing sensing device 1000 may include a case 1200, a sensing module 1400, a cover 1600, and a signal processing module 1800. In FIG. 3, all of the above-described configurations are shown to be integrally provided with the breathing sensing device 1000, but the signal processing module 1800 may be excluded from the breathing sensing device 1000 and may exist separately from the outside.

The breathing sensing device 1000 has an external appearance formed by the case 1200, and includes a sensing module 1400 sensing vibrations inside or below it, and a signal processing module 1800 processing electrical signals according to the vibrations. , It may include a cover 1600 covering the adhesive material.

The case 1200 is a configuration that forms the exterior of the breath sensing device 1000.

The case 1200 may protect other components of the breathing sensing device 1000 from external impact or contamination. The case 1200 may provide a space in which the breath sensing device 1000 is accommodated. For example, since it is provided in a thin film shape, the sensing module 1400 and the signal processing module 1800 may be covered from above.

The case 1200 may be made of a flexible material so that its shape can be changed to fit the shape of the body part to be attached. For example, the case 1200 may be formed of a type of rubber.

The case 1200 may be made of a non-conductor. The case 1200 may insulate other components in the breathing sensing device 1000 so that the electrical signal in the breathing sensing device 1000 does not leak to the outside except for the purpose of data transmission.

In addition, the case 1200 may serve to prevent transmission of external vibrations generated from the opposite side of the case 1200 on which the sensing module 1400 for sensing vibrations is disposed to the sensing module 1400. In an environment such as an operating room in which the breath sensing device 1200 is used, an audio signal irrelevant to breathing may be generated due to surgery or other causes. For example, the case 1200 may be made of a material such as rubber that reduces external audio signals. Accordingly, transmission of the external audio signal to the sensing module 1400 is blocked, so that noise from the sensing module 1400 may be removed or reduced.

Furthermore, the case 1200 may amplify vibrations caused by breathing detected by the sensing module 1400. Vibration caused by breathing mainly has a frequency in the 200 to 1,000 Hz band, and the case 1200 is made of a material having a resonant frequency for the corresponding frequency band and may serve to amplify the vibration detected by the sensing module 1400. have.

The sensing module 1400 is configured to generate an electrical signal according to the vibration of the attachment portion 2. The sensing module 1400 may be adhered to the attachment portion 2, and when vibration generated in the attachment portion 2 is transmitted to the inside, an electrical signal may be generated using a piezoelectric effect.

The sensing module 1400 may include an adhesive layer 1420, an insulating layer 1440, and a piezoelectric film 1460.

The adhesive layer 1420 may provide adhesive force so that the breath sensing device 1000 can be attached to the attachment site 2. Also, since the adhesive layer 1420 is conductive, it may function as an electrical path for grounding the piezoelectric film 1460 to the body.

The insulating film 1440 electrically insulates the piezoelectric film 1460 and the adhesive layer 1420 to prevent external influences caused by an electrocardiogram (ECG) signal and an electromyogram (EMG) signal generated from the patient 1's body. It can be blocked or reduced.

The piezoelectric film 1460 may generate an electrical signal in response to vibration transmitted through the adhesive layer 1420 and the insulating layer 1440.

Specifically, the adhesive layer 1420 may include an adhesive material. When measuring vibration, the adhesive material provides a contact force that allows the breathing sensing device 1000 to come into close contact with the surface of the attachment site 2 without a gap, but after the vibration measurement, the breathing sensing device 1000 is easily separated by an external force. It can provide a contact force as much as possible. The adhesive material may be applied to the entire area of the adhesive layer 1420 or may be applied only to a part of the adhesive layer 1420.

The adhesive layer 1420 may be formed of a flexible material so that the shape of the adhesive layer 1420 can be flexibly deformed according to the curvature and shape of the surface of the attachment portion 2. As a result, the surface area of the adhesive layer 1420 in contact with the body may increase. Accordingly, adhesion between the adhesive layer 1420 and the body may increase. In addition, accordingly, vibration transmitted from the attachment portion 2 may be effectively transmitted to the adhesive layer 1420.

In addition, the adhesive layer 1420 functions to transmit the vibration of the attachment portion 2 to the piezoelectric film 1460 through the insulating film 1440. In this case, vibration transmitted by the adhesive layer 1420 to the upper layer may be selective. For example, the adhesive layer 1420 allows transmission of a wave having a frequency of vibration due to breathing, but may block a wave having a frequency other than that. That is, the adhesive layer 1420 may function as a kind of band-pass filter for vibration transmitted from the attachment portion 2. Accordingly, sensing sensitivity may be improved by the adhesive layer 1420. This will be described in more detail later.

The adhesive layer 1420 may be made of a material harmless to the human body. In particular, it may be important that the adhesive material is made of a material that is harmless to the human body as a part of the adhesive material may remain on the human body after being separated from the human body.

Also, specifically, the insulating layer 1440 may be formed of an insulating material to insulate the piezoelectric film 1460. In particular, the insulating film 1440 may insulate the piezoelectric film 1460 by preventing contact between the piezoelectric film 1460 and the adhesive layer 1420. The insulating layer 1440 blocks electromagnetic waves emitted from the body from reaching the piezoelectric film, thereby minimizing the influence of the electromagnetic waves. This will be described more later.

In addition, the insulating layer 1440 may retransmit vibration transmitted through the adhesive layer 1420 to the piezoelectric film 1460.

In addition, the insulating film 1440 may be flexibly deformed in accordance with the bending of the attachment portion 2. Deformation of this shape may help to retransmit the vibration transmitted from the adhesive layer 1420 to the piezoelectric film 1460.

Meanwhile, in one region of the insulating layer 1440, the piezoelectric film 1460 may be grounded to the body through the adhesive layer 1420. Since the piezoelectric film 1460 is grounded with a body having a large electric capacity, it is easy to set a reference potential and noise of a signal can be reduced.

In addition, specifically, the piezoelectric film 1460 may include an upper electrode 1480a, a piezoelectric material 1470, and a lower electrode 1480b. The upper electrode 1480a, the piezoelectric material 1470, and the lower electrode 1480b may be provided in the form of a thin film, and may play a role similar to a capacitor because they are overlapped while facing each other while facing each other. The piezoelectric material 1470 may generate a potential difference in the upper electrode 1480a and the lower electrode 1480b in response to an external force due to a piezoelectric effect. Electrical signals may be generated in the upper and lower electrodes 1480b according to a potential difference.

The piezoelectric effect refers to a phenomenon in which a voltage is generated between two opposing faces of a crystal due to a pressure or torsional force acting on a piezoelectric crystal. Or, as an inverse phenomenon for this, it refers to a phenomenon in which a distortion that changes in the frequency of the voltage occurs by applying a voltage between the two surfaces. The nature of the piezoelectric effect is closely related to the occurrence of an electric dipole moment in a solid. The reason why the polarization changes when a mechanical force is applied is because the direction of the molecular arrangement changes due to the influence of external stress, and it occurs as the direction of the dipole moment changes. Materials exhibiting such a piezoelectric effect include naturally occurring quartz, berlinite, sucrose, topaz, and tourmaline, and artificial piezoelectric materials include gallium phosphate, Langasite or PZT, and zinc oxide. And ceramics with a Perovskite structure and a Tungsten-bronze structure. Among them, a material that is widely used and has excellent piezoelectric effect is polyvinylidene fluoride (PVDF), which can produce a piezoelectric effect several times greater than that of quartz.

The piezoelectric material 1470 may be a material selected from the above-described piezoelectric materials.

The cover 1600 is configured to cover the adhesive layer 1420. The cover 1600 prevents the adhesive layer 1420 from being exposed to an external material before the breath sensing device 1000 is attached to the attachment portion 2, thereby maintaining good adhesive strength. The cover 1600 is removed immediately before the breathing sensing device 1000 is attached, thereby exposing the adhesive layer 1420 to the outside, and allowing the adhesive layer 1420 to contact and attach to the skin. The cover 1600 may have a certain level of adhesion to the adhesive layer 1420 so as not to be peeled off by a small degree of external force. However, on the one hand, it must be in contact with the adhesive layer 1420 with a certain level of adhesion or less so that it can be easily peeled off by an external force of a certain size or more, and may be made of a material capable of withstanding a certain tension and shear force so as not to be damaged when peeled off.

The signal processing module 1800 is a component that receives and processes electrical signals.

The signal processing module 1800 may receive an electric signal from the sensing module 1400.

The signal processing module 1800 may perform an operation required to process the received electrical signal. For example, the signal processing module 1800 may perform processing for removing noise on the received electrical signal, and may include a noise removing circuit for this.

Alternatively, the signal processing module 1800 may perform impedance matching on the output of the sensing module 1400 and may include a FET circuit for this.

Alternatively, the signal processing module 1800 may perform an operation of amplifying an electric signal.

The signal processing module 1800 may then transmit the processed electrical signal to the respiratory monitoring device 120 through a cable.

Hereinafter, the structure and each configuration of the breathing sensing device 1000 according to an embodiment of the present invention will be described with reference to FIGS. 4 to 7.

Figure 4 is a perspective view of a breathing sensing device 1000 according to an embodiment of the present invention, Figure 5 is an exploded perspective view of the breathing sensing device 1000 according to an embodiment of the present invention, Figure 6 is an embodiment of the present invention It is a side cross-sectional view of the breathing sensing device 1000 according to the embodiment, and Figure 7 is an exploded side cross-sectional view of the breathing sensing device 1000 according to an embodiment of the present invention.

When the breathing sensing device 1000 looks at its appearance, the breathing sensing device 1000 may have a flat plate shape having a generally thin thickness.

The breath sensing device 1000 may be manufactured in a square shape when viewed from above. Specifically, the breath sensing device 1000 may have a rectangular shape having a longer one end so as to surround the attachment portion 2.

One area of the upper portion of the breathing sensing device 1000 may have a shape protruding upward. The protruding shape may be formed in a position inclined to one side of the breath sensing device 1000 to the left and right.

A cable may be connected to one side of the breathing sensing device 1000.

The breathing sensing device 1000 may have a structure in which a cover 1600, an adhesive layer 1420, an insulating film 1440, a piezoelectric film 1460, and a case 1200 are sequentially stacked from a lowermost layer to an uppermost layer. In this case, the signal processing module 1800 may be positioned horizontally with the piezoelectric film 1460 and positioned between the insulating film 1440 and the case 1200. That is, in the breathing sensing device 1000, the cover 1600 is located on the lowermost layer, the adhesive layer 1420 is located on the cover 1600, and the piezoelectric film 1460 and the signal processing module 1800 are located on the adhesive layer 1420. And, it may be a stacked structure in which the case 1200 is located on the uppermost layer.

The cover 1600 may be provided in the form of a thin film. The cover 1600 may have an area equal to or larger than the area of the adhesive layer 1420 when viewed from above.

The adhesive layer 1420 may be provided in the form of a thin film. The adhesive layer 1420 may be provided with a gel-like material having both adhesiveness, conductivity, and flexibility. Here, as an example of the gel-like material, a hydrogel may be used. Examples of hydrogels include agarose gels. The gel is a material having a porous network structure, and its shape can be flexibly changed by an external force. In addition, among them, the hydrogel may have electrical conductivity because it contains water in its network structure. In addition, the gel may have adhesiveness due to crosslinking forming a network structure.

The adhesive layer 1420 may be provided with a sufficient length to provide sufficient adhesive force to the breath sensing device 1000. In particular, the adhesive layer 1420 is located on the upper layer and has a sufficient length on both sides of the receiving unit 1202 in which the signal processing module 1800 is accommodated so that the cable and the signal processing module 1800, which may be relatively heavy, can be accurately adhered. Can be extended to

On the other hand, the gel material constituting the adhesive layer 1420 further provides an electrical channel function for grounding of the lower electrode 1480b and a filtering function for respiratory vibration in addition to adhering the breathing sensing device 1000 to the attachment site 2. I can have it.

The insulating layer 1440 may be provided in the form of a thin film. The insulating layer 1440 may be interposed between the adhesive layer 1420 and the piezoelectric film 1460. When viewed from above, the area of the insulating layer 1440 may be provided larger than the area of the piezoelectric film 1460.

Manufacturing materials of the insulating layer 1440 or manufacturing specifications such as thickness and area may be determined in consideration of insulation, flexibility, and vibration transmission rate of the insulating layer 1440.

Meanwhile, a through hole 1442 may be formed in the insulating layer 1440. The through hole 1442 electrically connects the piezoelectric film 1460 and the adhesive layer 1420 to ground the piezoelectric film 1460 to the body through the adhesive layer 1420.

The through hole 1442 may be an empty space extending from the upper surface to the lower surface of the insulating layer 1440 while penetrating through the insulating layer 1440.

When the adhesive layer 1420, the insulating film 1440, and the piezoelectric film 1460 are overlapped, the through hole 1442 may be formed in a region of the insulating film 1440 in contact with the adhesive layer 1420 and the piezoelectric film 1460. . Accordingly, when the adhesive layer 1420, the insulating film 1440, and the piezoelectric film 1460 are in close contact with each other and overlap, a part of the adhesive layer 1420 corresponding to the through hole 1442 is inserted into the through hole 1442 and the piezoelectric film It may contact the lower electrode 1480b of 1460 (see FIG. 6). Accordingly, in a region corresponding to the through hole 1442, the piezoelectric film 1460 and the adhesive layer 1420 may be electrically connected.

The through hole 1442 may be a cylinder having a generally circular cross section, but is not limited thereto, and the cross section may be a polygonal cross section or a shape having a minimum cross section in the form of a slit.

The piezoelectric film 1460 may include a piezoelectric material 1470, an upper electrode 1480a, and a lower electrode 1480b. The piezoelectric material 1470, the upper electrode 1480a, and the lower electrode 1480b may be in the form of a thin film. The upper electrode 1480a may be formed on the upper surface of the piezoelectric material 1470, and the lower electrode 1480b may be formed on the lower surface of the piezoelectric material 1470.

The structure of the piezoelectric film 1460 and the shape of each component will be described in more detail later.

The signal processing module 1800 may be positioned adjacent to the piezoelectric film 1460. This is because it is advantageous for the signal processing module 1800 to be located close to the output terminal for impedance matching. When the path for connecting the signal processing module 1800 and the piezoelectric film 1460 is lengthened, the output and sensitivity of the electric signal output from the piezoelectric film 1460 may decrease. All materials have their own inherent impedance, and the impedance increases as the connection path becomes longer, so that the electrical signal output from the piezoelectric film 1460 may become more susceptible to noise.

The signal processing module 1800 may be disposed at a position parallel to the piezoelectric film 1460 when viewed from the top. In other words, when viewed from the top, the signal processing module 1800 may be positioned so that an area overlapping the piezoelectric film 1460 does not occur. This is because the signal processing module 1800 is not disposed in the direction of the gap between the upper electrode 1480a and the lower electrode 1480b, so that the electrical effect of the signal processing module 1800 decreases the capacitance between the electrodes 1480a and 1480b. This is to avoid disturbing them.

In this case, noise that may occur due to the overlapping of the signal processing module 1800 and the piezoelectric film 1460 may be removed. For example, when the signal processing module 1800 and the piezoelectric film 1460 overlap, noise that may affect the vibration sensing sensitivity of the piezoelectric film 1460 due to the mass and volume of the signal processing module 1800 Can be caused. Alternatively, the signal processing module 1800 may be made of a rigid material due to the general characteristics of the circuit board. In this case, the rigid signal processing module 1800 and the flexible piezoelectric film 1460 have different degrees of reaction according to vibrations. This may cause a gap between the signal processing module 1800 and the piezoelectric film 1460 during vibration. This can be a source of noise. Therefore, by placing the signal processing module 1800 and the piezoelectric film 1460 side by side in a horizontal direction without overlapping regions, the above-described potential sources of noise can be reduced or eliminated.

The signal processing module 1800 may include a circuit board, a connection terminal, a cable, and a housing.

The circuit board is a component that receives and processes signals. Various electronic devices required for signal processing may be disposed on the circuit board. The circuit board may be a flexible material that bends according to body curvature, or may be a general rigid printed circuit board (PCB). Of course, it is also possible to use a flexible printed circuit board (FPCB) as a circuit board.

The connection terminal is connected to the piezoelectric film 1460 to receive an electric signal from the piezoelectric film 1460. In this case, the connection terminal may be coupled to the terminal portion 1484 of the piezoelectric film 1460 in a riveting form. Alternatively, the connection terminal may be coupled to the terminal portion 1484 of the piezoelectric film 1460 in the form of soldering. Alternatively, the connection terminal may be connected to a conductive wire connected to the terminal portion 1484 of the piezoelectric film 1460.

The cable is a component that transmits the signal processed on the circuit board to the breath monitoring device 120. The cable is horizontally inserted into the housing from one side of the housing, and may be connected to the circuit board. The cable may access the signal processing module 1800 while extending away from the piezoelectric film 1460 so as not to cross the piezoelectric film 1460.

The housing is a configuration that provides a space in which a circuit board, connection terminals and cables are located. The housing may be an exterior material for protecting a circuit board, a connection terminal, and a cable. Thereby, the connection between the circuit board, the connection terminal, and the cable in the housing can be securely maintained even against external vibration.

In addition, the housing may have a shape in which it is easy for the circuit board to be interposed between the case 1200 and the insulating layer 1440. For example, since the housing is provided in a flat plate shape, it may be easy to fix.

In addition, the housing may block an electrical signal so that it is not electrically connected to an external component in a region other than the connection terminal. Thus, the housing can be composed of an insulator.

On one side of the housing, the circuit board may be horizontally connected to the terminal portion 1484 of the piezoelectric film 1460 in parallel.

The case 1200 may be located on the uppermost surface of the breath sensing device 1000. The case 1200 may be generally in the form of a thin film. The case 1200 may have the same area as the insulating layer 1440 or larger than the insulating layer 1440 when viewed from above. The case 1200 may be stacked while covering the insulating layer 1440 from above, and a piezoelectric film 1460 and a signal processing module 1800 may be interposed therebetween.

The case 1200 may include a receiving unit 1202 in which the signal processing module 1800 is accommodated. The receiving part 1202 may have a shape in which one area of the case 1200 protrudes convexly and has an empty space therein. When the case 1200 and the piezoelectric film 1460 are superimposed, the accommodating part 1202 may be formed on the side of the piezoelectric film 1460 so as not to overlap with the piezoelectric film 1460. In consideration of the receiving part 1202, in the adhesive layer 1420, the adhesive layer 1420 may extend from one side of the receiving part 1202 by a predetermined length in a direction away from the piezoelectric film 1460. A hole through which the cable passes may be formed in the receiving part 1202.

8 is a block diagram showing the configuration of a breathing monitoring system according to an embodiment.

Referring to Figure 8, the breathing monitoring system 2000 according to an embodiment may include a breathing sensing device (2100, 2200) and a breathing monitoring device (2300), the breathing sensing device (2100, 2200) is a plurality It may include a dog breath sensing device and a signal processing module 2400. However, although not shown in the drawings, the signal processing module 2400 may be included in the monitoring device 2300.

The breathing sensing devices 2100 and 2200 may include piezoelectric films 2110 and 2210, insulating films 2120 and 2220, and adhesive layers 2130 and 2230 as shown in the drawing, but are not limited thereto, and the piezoelectric effect It may be a configuration capable of acquiring information about the body by detecting the vibration generated in the patient's body by using. For example, the breathing sensing devices 2100 and 2200 may include the piezoelectric film and the adhesive layer, excluding the insulating film, or may include a piezoelectric film and an insulating film, excluding the adhesive layer, or It may also include an additional configuration for detecting vibrations generated in the body by using the piezoelectric effect.

In addition, the breathing sensing devices 2100 and 2200 may include a plurality of breathing sensing devices 2100 and 2200. In this case, each of the plurality of breathing sensing devices 2100 and 2200 may detect vibrations generated in the patient's body and generate electrical signals accordingly. In addition, the electric signals generated from each of the plurality of breathing sensing devices 2100 and 2200 may have different generation times and intensity depending on the type of vibration generated by the patient's body.

In addition, the plurality of breathing sensing devices 2100 and 2200 may be attached to any point on the patient's body. In this case, the generation timing and intensity of electrical signals generated from each of the plurality of breathing sensing devices 2100 and 2200 may be different depending on the positions to which the plurality of breathing sensing devices 2100 and 2200 are attached. For example, when any one 2100 of the plurality of breathing sensing devices 2100 and 2200 is attached to the patient's neck rest, the breathing sensing device 2100 attached to the patient's neck rest is It is possible to generate an electrical signal by detecting the generated vibration.

In addition, the plurality of breathing sensing devices (2100, 2200) is generated in each of the plurality of breathing sensing devices (2100, 2200) depending on the degree of spaced apart from the attached position, the generation point of the vibration, and the type of the vibration. The generation timing and intensity of the electrical signal may be different.

In addition, as the plurality of breathing sensing devices 2100 and 2200 are attached to the patient's body, the plurality of breathing sensing devices 2100 and 2200 may use the patient's body as a ground. In this case, when the plurality of breathing sensing devices 2100 and 2200 use the patient's body as a ground, noise included in the electrical signals generated by the plurality of breathing sensing devices 2100 and 2200 may be reduced. .

In addition, when the plurality of breathing sensing devices 2100 and 2200 use the patient's body as a ground, the breathing sensing devices 2100 and 2200 may be more conveniently configured without configuring an additional ground.

In addition, as the plurality of breathing sensing devices 2100 and 2200 use the patient's body as a ground, the plurality of breathing sensing devices 2100 and 2200 may share the patient's body as a ground. Accordingly, even when the physical condition of the patient is changed, since the patient's body is shared as the ground, errors in electrical signals generated by the plurality of breath sensing devices 2100 and 2200 can be reduced. Here, the error of the electrical signal generated from the plurality of breathing sensing devices may refer to a difference in the electrical signal generated according to the same vibration when the other is attached to a position to which one of the plurality of breathing sensing devices is attached. .

In addition, the plurality of breathing sensing devices 2100 and 2200 may pass through the adhesive layers 2130 and 2230 as shown in FIG. 8 in order to use the patient's body as a ground. Specifically, the adhesive layers 2130 and 2230 are attached to the patient's body, penetrate through the insulating layers 2120 and 2220 and are connected to the upper electrodes included in the piezoelectric films 2110 and 2210 to ground the upper electrode. Can be used. Alternatively, the adhesive layers 2130 and 2230 are attached to the patient's body, penetrate through the insulating layers 2120 and 2220 and are connected to the lower electrodes included in the piezoelectric films 2110 and 2210 to use the lower electrode as a ground. I can.

In addition, the breathing sensing devices 2100 and 2200 may include a signal processing module 2400. The signal processing module 2400 may process electrical signals generated from the plurality of breath sensing devices 2100 and 2200.

In addition, the signal processing module 2400 may acquire body information of the patient based on electrical signals generated from the plurality of breath sensing devices 2100 and 2200.

In addition, the signal processing module 2400 may be included in some of the plurality of breath sensing devices 2100 and 2200 or may be included in the monitoring device 2300. However, in FIG. 8, the signal processing module 2400 is shown to be included in some of the plurality of breath sensing devices 2100 and 2200, but is not limited thereto, and the plurality of breath sensing devices 2100 and 2200 and It may exist independently of the monitoring device 2300 and be included in the breathing monitoring system.

In addition, the signal processing module 2400 may be a plurality, and may be included in each of the plurality of breathing sensing devices 2100 and 2200, in this case, the electrical generated by each of the plurality of breathing sensing devices 2100 and 2200 A signal processing module for processing signals in common may be further included.

In addition, the signal processing module 2400 may acquire body information of the patient based on a temporal difference between electrical signals generated from each of the plurality of breath sensing devices 2100 and 2200.

In addition, the signal processing module 2400 may acquire body information of the patient based on a difference in intensity of electrical signals generated from each of the plurality of breath sensing devices 2100 and 2200.

In addition, the signal processing module 2400 may acquire body information of the patient based on a signal obtained by combining electrical signals generated from each of the plurality of breath sensing devices 2100 and 2200.

9 is a schematic diagram of a breathing monitoring system according to an embodiment.

9, the breathing monitoring system 2500 according to an embodiment may include a breathing sensing device (2510.2520) and a breathing monitoring device (2530), the breathing sensing device is a first breathing sensing device (2510) And a second breath sensing device 2520.

As shown in FIG. 9, the first breathing sensing device 2510 and the second breathing sensing device 2520 may be attached to the body of the patient 1, and specifically, the neck rest 2502 of the patient 1 ) Can be attached. At this time, the neck cradle 2502 of the patient 1 may representatively mean a movement path of the air that the patient inhales and exhales when the patient breathes, and the first and second breath sensing devices (2510.2520) May be attached along the movement path of the inhaled and exhaled air when the patient breathes, even if it is not the patient's neck.

In addition, as shown in FIG. 9, the first breathing sensing device 2510 may be attached to a point 2503 of the neck rest 2502 of the patient 1 close to the head of the patient 1, and the The second breathing sensing device 2520 may be attached to a point 2504 of the patient's neck rest near the patient's chest. However, the present invention is not limited thereto, and the second breathing sensing device 2520 is attached to a point 2503 of the patient's neck rest near the patient's head, and the first breathing sensing device 2510 is It may be attached to a point 2504 of the neck rest near the patient's chest.

In addition, the first and second breathing sensing devices 2510 and 2520 may detect vibrations generated by the breathing of the patient 1 and generate an electrical signal accordingly. For example, by the breathing of the patient 1, air moves along the airway of the patient, and the neck rest 2502 surrounding the airway vibrates, and accordingly, the first and second breathing sensing devices ( The 2510 and 2520 may sense the vibration of the moulduk 2502 and generate an electrical signal accordingly.

In addition, although not shown in the drawings, the breathing monitoring system 2500 may include a signal processing module. The signal processing module may be included in any one of the first breathing sensing device 2510, the second breathing sensing device 2520, and the monitoring device 2530.

In addition, there may be a plurality of signal processing modules, and may be included in all of the first breathing sensing device 2510, the second breathing sensing device 2520, and the monitoring device 2530.

In addition, the signal processing module may determine the type of respiration of the patient 1 based on a difference between electrical signals generated from the first and second respiration sensing devices 2510 and 2520.

10 is a view showing a state of use of a breath sensing device according to an embodiment.

Referring to FIG. 10, a breathing monitoring system 2500 according to an embodiment includes a first breathing sensing device 2510 and a second breathing sensing device 2520, and the first breathing sensing device 2510 and the The second breath sensing device 2520 may be attached to the neck rest 2502 of the patient 1.

In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may include a long edge having a long length and a short edge having a short length. In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 have long axes 2511 and 2521 that are central axes parallel to the long edges and the short axes 2512 and 2522 that are central axes parallel to the short edges. ) Can be included.

Specifically, the first breathing sensing device 2510 and the second breathing sensing device 2520 may be attached to the neck rest 2502 of the patient 1 along the movement path of the breathing of the patient 1, and , In the first breathing sensing device 2510 and the second breathing sensing device 2520, the long axis is perpendicular to the movement path of the patient 1's breath, and the short axis is the movement of the patient 1's breathing. It may be attached to the neck rest 2502 of the patient 1 so as to be parallel to the path. When attached to the neck rest 2502 of the patient 1 such that the movement path of the patient 1's breathing and the long axis are vertical, the first breathing sensing device 2510 and the second breathing sensing device 2520 ), the difference between the viewpoints detected can be made more accurate. More specifically, the first breathing sensing device 2510 and the second breathing sensing device 2520 may detect vibrations generated from breathing of the patient, and the vibrations may be the first breathing sensing device 2510 or It may be detected through the area to which the second breath sensing device 2520 is attached. Accordingly, when the first breathing sensing device 2510 and the second breathing sensing device 2520 are randomly attached, the timing at which the vibration is sensed by the first breathing sensing device 2510 and the second breathing sensing device The difference between the time point at which the vibration is sensed at (2520) may not be clear. On the other hand, when the first breathing sensing device 2510 and the second breathing sensing device 2520 are attached so that each major axis and a movement path of the patient's breath are vertically attached, the first breathing sensing device 2510 and Depending on the separation distance D of the second breathing sensing device 2520 and the moving speed of the patient 1's breath, the timing at which vibrations are detected in each of the breathing sensing devices 2510 and 2520 may be clearly different. have.

In addition, a direction parallel to the long axis may mean a longitudinal direction of the first and second breath sensing devices 2510 and 2520.

In addition, a direction including a line connecting the center of the first and second breathing sensing devices 2510 and 2520 may be referred to as an arrangement direction, and the first breathing sensing device 2510 and the second breathing sensing device 2520 ) May be attached to the patient's body such that its longitudinal direction is perpendicular to the arrangement direction of the first breathing sensing device 2510 and the second breathing sensing device 2520.

In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may be attached to the neck rest 2502 of the patient 1 with a constant separation distance D. The time when vibration is sensed by each of the breathing sensing devices 2510 and 2520 is a time when the neck rest 2502 of the patient 1 vibrates by the breath of the patient 1, and the breathing sensing device 2510 and 2520 In each case, it may be determined by a time for converting the vibration into an electrical signal. Therefore, the first breathing sensing device 2510 and the second breathing sensing device 2520 may be spaced apart by a predetermined distance or more and attached to the neck rest 2502 of the patient 1. In addition, when the first breathing sensing device 2510 and the second breathing sensing device 2520 are attached to the neck rest 2502 of the patient 1 with a certain separation distance D, the breathing of the patient 1 A difference may occur at a time point at which vibration is sensed based on the moving speed of and the separation distance D.

In addition, as the first and second breath sensing devices 2510 and 2520 are attached to the patient's body, they may share the patient's body as a ground.

11 is a view showing the operation of the breathing monitoring system when the patient breathes in.

Referring to FIG. 11, the breathing monitoring system 2500 according to an embodiment may include a first breathing sensing device 2510 and a second breathing sensing device 2520. In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may detect vibrations generated by breathing of the patient 1 and generate an electrical signal according to the vibrations.

In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may be attached to the neck rest 2502 of the patient 1 and may have a certain distance D.

In addition, the first breathing sensing device 2510 may be located at a location 2503 close to the head of the patient 1, and the second breathing sensing device 2520 may be located far from the head of the patient 1 It can be positioned 2504 with a certain distance (D) in the direction.

In addition, when the patient 1 inhales, the breath that the patient 1 inhales may come in through the nose or mouth of the patient 1. In addition, the patient's breath through the nose or mouth of the patient 1 passes through the upper part of the airway included in the neck brace 2502 of the patient 1 and passes through the lower part of the airway included in the patient's neck brace 2502. It can travel to the lungs.

In addition, when the patient (1) breathes, air can move through the airways included in the neck rest (2502) of the patient (1), and accordingly, vibration occurs in the neck rest (2502) of the patient (1). I can.

Therefore, when the patient 1 breathes in, the first breathing sensing device 2510 and the second breathing sensing device 2520 are located in a location 2503 close to the head of the patient 1 Vibration may first occur in the upper part 2503 of the neck rest 2502 of the patient 1 to which the first breathing sensing device 2510 is attached. In addition, among the first breathing sensing device 2510 and the second breathing sensing device 2520, the second breathing sensing device 2520 located at a distance 2504 from the head of the patient 1 is attached. Vibration may occur later in the lower portion 2504 of the neck rest 2502 of the patient 1.

In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may generate electrical signals based on vibrations generated in the neck rest 2502 of the patient 1. In this case, the electrical signal 2511 generated by the first breathing sensing device 2510 may be generated faster than the electrical signal 2521 generated by the second breathing sensing device 2520. Specifically, vibration occurs first in the upper part 2503 of the neck rest 2502 of the patient 1 to which the first breathing sensing device 2510 is attached, and the patient to which the second breathing sensing device 2520 is attached ( Since vibration occurs later in the lower part 2504 of the neck brace 2502 of 1), the first breathing sensing device 2510 senses the vibration generated in the upper part 2503 of the throat 2502 of the patient 1 and is based on this. The electrical signal 2511 is first generated, and the second respiration sensing device 2520 detects the vibration generated in the lower portion 2504 of the neck rest 2502 of the patient and generates an electrical signal 2521 based on this. I can.

12 is a diagram showing the operation of the breathing monitoring system when the patient exhales.

Referring to FIG. 12, the breathing monitoring system 2500 according to an embodiment may include a first breathing sensing device 2510 and a second breathing sensing device 2520. In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may detect vibrations generated by breathing of the patient 1 and generate an electrical signal according to the vibrations.

In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may be attached to the neck rest 2502 of the patient 1 and may have a predetermined distance.

In addition, the first breathing sensing device 2510 may be located near the head of the patient 1, and the second breathing sensing device 2520 is spaced apart from the head of the patient 1 by a certain distance. Can be located with distance.

In addition, when the patient 1 exhales, the exhaled breath of the patient 1 passes from the lungs of the patient 1 to the lower portion of the airway included in the neck brace 2502 of the patient 1 It is possible to go out to the nose or mouth of the patient 1 through the upper part of the airway included in the neck girdle 2502.

In addition, when the patient (1) breathes, air can move through the airways included in the neck rest (2502) of the patient (1), and accordingly, vibration occurs in the neck rest (2502) of the patient (1). I can.

Therefore, when the patient 1 exhales, the second breath sensing located at a distance from the head of the patient 1 among the first breath sensing device 2510 and the second breath sensing device 2520 Vibration may first occur in the lower portion 2504 of the neck rest 2502 of the patient 1 to which the device 2520 is attached. In addition, among the first breathing sensing device 2510 and the second breathing sensing device 2520, the neck rest of the patient 1 to which the first breathing sensing device 2510 located near the head of the patient is attached ( 2502) Vibration may occur later in the upper part 2503.

In addition, the first breathing sensing device 2510 and the second breathing sensing device 2520 may generate electrical signals based on vibrations generated in the neck rest 2502 of the patient 1. In this case, the electrical signal 2522 generated by the second breathing sensing device 2520 may be generated faster than the electrical signal 2512 generated by the first breathing sensing device 2510. Specifically, vibration occurs first in the lower part 2504 of the neck rest 2502 of the patient 1 to which the second breathing sensing device 2520 is attached, and the patient to which the first breathing sensing device 2510 is attached Since the vibration occurs later in the upper part 2503 of the neck girdle 2502 of (1), the second breath sensing device 2502 senses the vibration first generated in the lower part 2504 of the throat brace 2502 of the patient 1 and Based on this, an electrical signal 2522 is generated, and the first breathing sensing device 2510 detects a vibration that occurs later in the upper portion 2503 of the neck rest 2502 of the patient 1, and based on this, an electrical signal 2512 ) Can be generated.

13 is a view showing an electrical signal during one breathing cycle of the breathing monitoring system attached according to FIG. 9.

Referring to FIG. 13, a first breathing sensing device and a second breathing sensing device included in the breathing monitoring system according to an embodiment may each generate an electrical signal, and a first electrical signal generated from the first breathing sensing device By using the difference between 2610 and the second electrical signal 2620 generated from the second breathing sensing device, the type of breathing of the patient to which the breathing monitoring system is attached may be determined.

Specifically, as described above, when the patient breathes in, the first electrical signal 2610 generated from the first breathing sensing device is the second electrical signal 2620 generated from the second breathing sensing device. The point of occurrence is earlier than that. In addition, when the patient exhales, the first electrical signal 2610 generated from the first breathing sensing device has a slower generation time than the second electrical signal 2620 generated from the second breathing sensing device.

In addition, when the first breathing sensing device and the second breathing sensing device are spaced apart by a predetermined distance, the generation time of the first electrical signal 2610 and the second electrical signal 2620 generated according to the patient's breathing is It may differ over a certain amount of time.

In addition, vibrations caused by factors other than the patient's breathing may be detected by a difference of less than a predetermined time in the first breathing sensing device and the second breathing sensing device, and accordingly, the first electrical signal 2610 and the first 2 The generation time of the electrical signal 2620 may differ by less than a certain time, and there may be no difference between the generation time.

Accordingly, the breathing monitoring system may determine the type of breathing of the patient based on the difference between the first electrical signal 2610 and the second electrical signal 2620, and further, the electrical signal generated by the patient's breathing. It is possible to determine whether it is a signal or an electrical signal caused by factors other than breathing of a childbirth patient.

Specifically, referring to FIG. 13, during the first period 2630, which is an arbitrary period, the generation time 2611 of the first electrical signal 2610 is greater than the generation time 2621 of the second electrical signal 2262. It can be fast. In addition, accordingly, the breathing monitoring system may determine the electrical signals 2610 and 2620 generated during the first section 2630 as electrical signals generated from vibrations caused by the patient's inhalation.

In addition, during the second period 2640, which is another arbitrary period, the generation time 2612 of the first electrical signal 2610 and the generation time 2622 of the second electrical signal 2620 may be the same. In addition, accordingly, the breathing monitoring system may determine the electrical signals 2610 and 2620 generated during the second section 2640 as an electrical signal generated due to a cause other than the patient's breathing.

In addition, during the third period 2650, which is another arbitrary period, the generation time 2613 of the first electrical signal 2610 may be slower than the generation time 2623 of the second electrical signal 2620. In addition, accordingly, the breathing monitoring system may determine the electrical signals 2610 and 2620 generated during the third section 2650 as electrical signals generated from vibrations caused by the patient's exhalation.

In addition, the difference between the generation points 2611 and 2621 of the first and second electrical signals 2610 and 2620 generated during the first period 2630 and the first and second electrical signals generated during the third period 2650 The difference between the occurrence times 2613 and 2623 of the occurrence time of (2610, 2620) may be the same, but may differ according to the respiratory rate of the patient, and may be different according to the electrical signal generation rate of the breathing sensing device. For example, there may be a change in the rate at which the patient inhales and exhales, and there may be a difference in the time it takes for the first breath sensing device and the second breath sensing device to sense vibration and generate an electrical signal. have.

14 is a view showing a flow chart of the operation of the breathing monitoring system according to an embodiment.

Referring to FIG. 14, the breathing monitoring system according to an embodiment may determine the type of breathing of a patient to which the breathing sensing device is attached.

Specifically, the breathing monitoring system may include a first breathing sensing device, a second breathing sensing device, and a signal processing module, wherein the first breathing sensing device generates a first electrical signal, and the second breathing sensing device May generate a second electrical signal. In addition, the signal processing module may acquire the first electrical signal and the second electrical signal, and determine the type of breathing of the patient.

The operation of the breathing monitoring system may include acquiring first and second electrical signals (S2710). Specifically, the first breathing sensing device and the second breathing sensing device included in the breathing monitoring system detect vibrations occurring in the body of each attached patient, and based on the vibrations, a first electrical signal and a second electrical signal It can generate a signal. In addition, the signal processing module may acquire the first electrical signal and the second electrical signal.

In addition, the operation of the breathing monitoring system may include determining a difference in acquisition time of the first and second electrical signals (S2720). Specifically, the signal processing module included in the respiration monitoring system may determine the acquisition time difference of the first and second electrical signals by respectively determining the acquisition times of the first electrical signal and the second electrical signal, and , It is also possible to determine a difference in acquisition time of the first and second electrical signals by adding or subtracting the first and second electrical signals. In this case, the difference in acquisition time of the first and second electrical signals determined by the signal processing module may be the same as the difference in generation time of the electrical signals generated by the first and second breath sensing devices, and may be different. I can. For example, when the distance between the signal processing module and the first breathing sensing device is equal to the distance between the signal processing module and the second breathing sensing device, the difference between the acquisition time determined by the signal processing module and the first And a difference in generation time of the electrical signal generated by the second breathing sensing device may be the same. In addition, when the distance between the signal processing module and the first breath sensing device is different from the distance between the signal processing module and the second breath sensing module, the difference in acquisition time determined by the signal processing module and the first and second breath sensing devices 2 The difference in time of occurrence of electrical honeymoons generated by the breathing sensing device may be different. In this case, the distance between each of the breathing sensing devices and the signal processing module may mean a physical distance or an electrical distance formed along a path through which an electrical signal travels.

In addition, the operation of the breathing monitoring system may include determining the type of breathing of the patient (S2730). Specifically, as described above, when the first breathing sensing device is attached to the upper part of the patient's neck, close to the head of the patient, and the second breathing sensing device is attached to the lower part of the patient's neck, far from the patient's head. , When the signal processing module acquires the first electrical signal and the second electrical signal, there may be a difference in acquisition time, and when the acquisition time of the first electrical signal is faster than the acquisition time of the second electrical signal, the The breathing monitoring system may determine that the first and second electrical signals are generated from vibrations caused by the patient's inhalation, and when the acquisition time of the first electrical signal is slower than the acquisition time of the second electrical signal, the breathing The monitoring system may determine that the first and second electrical signals are generated from vibrations caused by the patient's exhalation. In addition, if the difference between the acquisition time of the first electrical signal and the acquisition time of the second electrical signal is less than a certain time interval, it is determined that the first and second electrical signals are caused by vibrations caused by causes other than breathing of the patient. May be.

15 is a schematic diagram of a breathing monitoring system according to an embodiment.

Referring to Figure 15, the breathing monitoring system 2800 according to an embodiment may include a breathing sensing device (2810, 2820) and a breathing monitoring device 2830, the breathing sensing device is a first breathing sensing device ( 2810) and a second breath sensing device 2820.

In addition, as shown in FIG. 15, the first breathing sensing device 2810 may be attached to the neck rest 2802 of the patient 1, and the second breathing sensing device 2820 is the patient 1 In addition to the neck of the neck may be attached to other parts (2803). In this case, the neck rest 2802 of the patient 1 may representatively mean a movement path of the air that the patient inhales and exhales when the patient breathes, and the first breath sensing device 2810 is the patient Even if it is not the neck of the neck in (1), when the patient breathes, it can be attached along the movement path of the inhaled and exhaled air. In addition, the part 2803 other than the neck rest of the patient 1 may mean a part in which vibration generated by the breathing of the patient 1 is not directly transmitted.

In addition, the first breathing sensing device 2810 may detect vibrations generated by the patient (by breathing), and thus generate an electrical signal. For example, by the breathing of the patient 1, air moves along the airway of the patient 1, and the neck rest 2802 surrounding the airway vibrates, and accordingly, the first breathing sensing device ( 2810) may detect the vibration of the moulduk 2802 and generate an electrical signal accordingly.

In addition, the second breathing sensing device 2820 may detect vibrations caused by causes other than breathing of the patient 1 and accordingly generate an electrical signal. For example, vibration is generated due to the movement of the patient 1, such as the tossing of the patient 1, and accordingly, the second breath sensing device 2820 detects the vibration generated in the body of the patient 1 Accordingly, an electric signal may be generated, or an electric signal may be generated according to the vibration generated by the physical activity for the life of the patient 1.

In addition, although not shown in the drawing, the breathing monitoring system 2800 may include a signal processing module. The signal processing module may be included in any one of the first breathing sensing device 2810, the second breathing sensing device 2820, and the monitoring device 2830.

In addition, the signal processing module removes noise or corrects an electrical signal generated by the first breath sensing device 2810 based on a difference between the electrical signals generated by the first and second breath sensing devices 2810 and 2820. can do.

FIG. 16 is a diagram illustrating an electrical signal during one breathing cycle of a patient with a breathing sensing device attached according to FIG. 15.

Referring to FIG. 16, a first breathing sensing device and a second breathing sensing device included in another breathing monitoring system according to an embodiment may each generate an electrical signal, and a first electrical signal generated from the first breathing sensing device And correcting the first electrical signal or removing noise by using a difference between the second electrical signal generated by the second breathing sensing device. In this case, the noise may refer to an electrical signal generated by detecting a vibration caused by a cause other than the patient's breathing.

In addition, as described above, the first breathing sensing device may be attached to the neck rest of the patient, and the second breathing sensing device is spaced apart from the first breathing sensing device at a predetermined distance other than the patient's neck rest. Can be attached.

In addition, the first breathing sensing device may detect vibrations occurring in the patient's body and generate a first electrical signal accordingly, and the first electrical signal is an electrical signal according to vibrations generated by the patient's breathing. And it may include an electrical signal according to the vibration caused by other causes in addition to the vibration generated by the patient's breathing.

In addition, the second breathing sensing device may detect vibration occurring in the patient's body and generate a second electrical signal accordingly, and the second electrical signal may be caused by other causes other than the vibration generated by the patient's breathing. It may include an electrical signal according to the vibration caused by.

In addition, as the first and second breathing sensing devices are attached to the patient's body, they may share the patient's body as a ground.

In addition, the first and second breathing sensing devices may share noise as they include electrical signals according to vibrations caused by causes other than breathing of the patient. For example, the first and second breathing sensing devices may detect vibrations caused by the patient's tossing, and accordingly generate a first electrical signal and a second electrical signal, respectively.

Accordingly, the breathing monitoring system may remove noise by correcting the first electrical signal based on the second electrical signal. For example, the first and second electrical signals may include electrical signals according to vibrations caused by the patient's tossing, and when the first electrical signal is reduced by the second electrical signal, the corrected first electrical signal 1 The electrical signal may not include an electrical signal due to vibration caused by the patient's tossing.

Specifically, referring to FIG. 16, the first electrical signal 2910 during the first period 2930, which is an arbitrary period, includes an electrical signal 2912 generated in response to vibrations caused by breathing of the patient 1 can do. However, during the first period 2930, the second electrical signal 2920 may not include an electrical signal generated according to vibrations caused by the breathing of the patient 1. However, in this case, the first electrical signal 2910 and the second electrical signal 2920 may include electrical signals 2911 and 2921 generated according to vibrations caused by causes other than breathing of the patient 1. .

In addition, during the second section 2940, which is another arbitrary section, the first and second electrical signals 2910 and 2920 generate electrical signals 2914 and 2924 caused by vibrations caused by the patient's turning. Can include. However, in this case, the first and second electrical signals 2910 and 2920 may include electrical signals 2913 and 2923 generated according to vibrations caused by causes other than breathing of the patient.

In addition, during the third section 2950, which is another arbitrary section, the first electrical signal 2910 may include an electrical signal 2916 generated in response to vibrations caused by breathing of the patient 1. However, during the third period 2950, the second electrical signal 2920 may not include an electrical signal generated according to vibrations caused by the breathing of the patient 1. However, in this case, the first and second electrical signals 2910 and 2920 may include electrical signals 2915 and 2925 generated according to vibrations caused by causes other than breathing of the patient 1.

Therefore, when the first electrical signal 2910 is corrected based on the difference between the first electrical signal 2910 and the second electrical signal 2920, the corrected first electrical signal 2960 is the patient It includes the electrical signals (2962, 2966) generated according to the vibration caused by the breathing of (1), and may not include the electrical signal generated by the vibration caused by a cause other than the breathing of the patient (1). For example, the corrected first electrical signal 2960 includes electrical signals 2962 and 2966 generated according to vibrations caused by the patient's breathing during the first section 2930 and the third section 2950. An electrical signal generated by vibrations caused by the patient 1's tossing and an electrical signal generated by vibrations caused by causes other than breathing of the patient 1 may not be included.

Accordingly, the breathing monitoring system may remove noise from the first electrical signal 2910 by correcting the first electrical signal 2910 using the second electrical signal 2920.

17 is a view showing a flow chart of the operation of the breathing monitoring system according to an embodiment.

Referring to FIG. 17, the breathing monitoring system according to an embodiment may remove noise to determine the breathing of a patient to which the breathing sensing device is attached.

Specifically, the breathing monitoring system may include a first breathing sensing device, a second breathing sensing device, and a signal processing module, wherein the first breathing sensing device generates a first electrical signal, and the second breathing sensing device May generate a second electrical signal. In addition, the signal processing module may obtain the first electrical signal and the second electrical signal, and may remove noise from the first electrical signal.

The operation of the breathing monitoring system may include acquiring first and second electrical signals (S2740). Specifically, the first and second breath sensing devices included in the breathing monitoring system detect vibrations occurring in the body of each attached patient, and generate a first electrical signal and a second electrical signal based on the vibration. I can. In addition, the signal processing module may acquire the first electrical signal and the second electrical signal.

In addition, the operation of the breathing monitoring system may include processing the first electrical signal using the second electrical signal (S2750). Specifically, the signal processing module included in the respiration monitoring system may reduce the intensity of the first electrical signal by the intensity of the second electrical signal, and may subtract the second electrical signal from the first electrical signal.

In this case, the first electrical signal is an electrical signal generated by vibrations caused by the patient's breathing, an electrical signal generated by vibrations caused by external factors such as the patient's torsion, and internally such as physical activities other than the patient's breathing. It may include an electrical signal generated according to vibration caused by a factor, and the second electrical signal is an electrical signal generated by vibration due to external factors such as the patient's tossing, and internal factors such as physical activity other than the patient's breathing It may include an electrical signal generated according to the vibration caused by. Therefore, by processing the first electrical signal using the second electrical signal, noise other than the electrical signal generated according to the vibration caused by the patient's breathing may be removed.

However, the noise may include mechanical and electrical noise generated by the operation of the first breathing sensing device and the second breathing sensing device, and the noise may not be completely removed. That is, the noise may not be removed and only the intensity may be reduced.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operation of the embodiment, and vice versa.

Although the embodiments have been described by the limited embodiments and drawings as described above, various modifications and variations can be made from the above description to those of ordinary skill in the art. For example, the described techniques are performed in a different order from the described method, and/or components such as systems, structures, devices, circuits, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and those equivalent to the claims also fall within the scope of the claims to be described later.

Claims (13)

At least two breath sensing devices are attached to different points of the neck of the user's body that are closely positioned in the path of movement of breath due to breathing, and use a piezoelectric effect to detect vibrations generated by the user's breathing. As a respiratory sensing system that acquires information on the user's breathing state by using,
A first breathing sensing device attached to a first point of the user's neck, and generating a first electrical signal according to the user's breathing;
A second breathing sensing device that generates a second electrical signal according to the user's breathing; And
Including; a signal processing module for processing the first and second electrical signals,
In order to determine the type of breathing of the user using the difference between the detection time of the first electrical signal and the detection time of the second electrical signal, the first electrical signal and the second electrical signal are The second breathing sensing device is attached to the second point of the neck of the user's neck that is separated by a predetermined distance or more along the path of breath according to the user's breathing so that a difference occurs at the time of detection.
The signal processing module
When the first electrical signal and the second electrical signal generated according to the user's first movement are detected when the first electrical signal is detected before the second electrical signal is detected, the type of breath is reduced to a first breath. Judging by,
When the detection time of the second electrical signal is earlier than the detection time of the first electrical signal with respect to the first electrical signal and the second electrical signal generated according to the second movement of the user, the type of breath is reduced to a second breath. Judging by
Breathing monitoring system.
The method of claim 1,
Each of the breath sensing devices,
A piezoelectric material in the form of a thin film, an upper electrode positioned above the piezoelectric material with the piezoelectric material interposed therebetween, and a lower electrode positioned below the piezoelectric material, and the upper portion according to vibration generated by the patient's breathing Including; a piezoelectric film for generating an electrical signal to the electrode and the lower electrode,
The first breathing sensing device uses the patient's body as a ground as the lower electrode of the first breathing sensing device is electrically connected to the first point,
The second breathing sensing device uses the patient's body as a ground as the lower electrode of the second breathing sensing device is electrically connected to the second point.
Breathing monitoring system.
The method of claim 2,
Each of the breath sensing devices,
It is positioned at the bottom of the piezoelectric film to face the lower electrode, is provided with an adhesive material, is attached in contact with the body of the patient, transmits the vibration generated by the patient's breathing to the piezoelectric film, and is conductive. An adhesive layer capable of electrically connecting the upper and lower surfaces; And
It is interposed between the piezoelectric film and the adhesive layer, and blocks the electrical connection between the piezoelectric film and the adhesive layer, and in order to reduce noise of an electrical signal due to the piezoelectric effect, the lower electrode is connected to the patient's body through the adhesive layer. An insulating film having a through hole electrically connecting the lower electrode and the adhesive layer to each other to be grounded to each other; further comprising
Breathing monitoring system.
The method of claim 1,
The signal processing module is installed in a monitoring device that displays information about the patient's breathing state based on the result of the signal processing module.
Breathing monitoring system.
The method of claim 1,
The signal processing module is installed in any one of the first breathing sensing device and the second breathing sensing device
Breathing monitoring system.
The method of claim 1,
The first breath represents the user's inhalation, and the second breath represents the user's exhalation
Breathing monitoring system.
The method of claim 6,
The second breathing sensing device is attached to a second point of the neck of the patient close to the head of the patient from the first point
Breathing monitoring system.
The method of claim 1,
In the signal processing module, a time difference between the detection time point of respiration according to the first electrical signal and the detection time point of respiration according to the second electrical signal is a distance between the first respiration sensing device and the second respiration sensing device. To determine the type of breathing based on the relationship between the detection time point of breathing according to the first electrical signal and the detection time point of breathing according to the second electrical signal by further selecting a corresponding predetermined time range.
Breathing monitoring system.
The method of claim 1,
The first breathing sensing device and the second breathing sensing device are each attached to the patient's body such that a longitudinal direction thereof is orthogonal to an arrangement direction of the first breathing sensing device and the second breathing sensing device.
Breathing monitoring system.
A respiratory sensing system for acquiring information about the patient's breathing by using at least two breathing sensing devices for detecting vibrations caused by the user's breathing using a piezoelectric effect,
A first breathing sensing device attached to a first point of the neck of the user's body that is closely positioned in a path of movement of breath according to the breathing of the user's body, and configured to sense a vibration generated by the user's breathing by using a piezoelectric effect;
A second breath sensing device that is attached to a second point of the user's body that is separated by a certain distance or more from a path of breathing according to breathing, and uses a piezoelectric effect to detect vibrations caused by movements other than the user's breathing ;
Including; a signal processing module for processing a first electrical signal generated from the first breathing sensing device and a second electrical signal generated from the second breathing sensing device,
In the first breathing sensing device and the second breathing sensing device, the first breathing sensing device uses the user's body as a ground through the first point with respect to the first electrical signal, and the second breath sensing The device shares the user's body as a ground by using the user's body as a ground through the second point with respect to the second electrical signal,
The signal processing module
In order to reduce the noise from the first electrical signal including noise generated from vibrations caused by movements other than the user's breathing, the first electrical signal is used by using the first electrical signal and the second electrical signal sharing ground. To correct the signal
Breathing monitoring system.
The method of claim 10,
Each of the breath sensing devices,
A piezoelectric material in the form of a thin film, an upper electrode positioned above the piezoelectric material with the piezoelectric material interposed therebetween, and a lower electrode positioned below the piezoelectric material, and the upper portion according to vibration generated by the patient's breathing Including; a piezoelectric film for generating an electrical signal to the electrode and the lower electrode,
The first breathing sensing device uses the patient's body as a ground as the lower electrode of the first breathing sensing device is electrically connected to the first point,
The second breathing sensing device uses the patient's body as a ground as the lower electrode of the second breathing sensing device is electrically connected to the second point.
Breathing monitoring system.
The method of claim 11,
Each of the breath sensing devices,
It is positioned at the bottom of the piezoelectric film to face the lower electrode, is provided with an adhesive material, is attached in contact with the body of the patient, transmits the vibration generated by the patient's breathing to the piezoelectric film, and is conductive. An adhesive layer capable of electrically connecting the upper and lower surfaces; And
It is interposed between the piezoelectric film and the adhesive layer, and blocks the electrical connection between the piezoelectric film and the adhesive layer, and in order to reduce noise of an electrical signal due to the piezoelectric effect, the lower electrode is connected to the patient's body through the adhesive layer. An insulating film having a through hole electrically connecting the lower electrode and the adhesive layer to each other to be grounded to each other; further comprising
Breathing monitoring system.
The method of claim 10,
The signal processing module,
Noise from the first electrical signal by adding and subtracting the second electrical signal generated by the vibration caused by a cause other than the user's breathing from the first electrical signal generated by the vibration caused by the user's breathing and the vibration caused by a cause other than breathing. To remove
Breathing monitoring system.

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