CN113080893A - Vital sign monitoring component, device and system - Google Patents

Abstract

The embodiment of the invention relates to the technical field of medical monitoring, and discloses a vital sign monitoring assembly, a device and a system. The sensor mat comprises at least two elastic protrusions; the optical fiber is wound on the at least two elastic bulges, and the optical fiber is wound on the elastic bulges for at least one circle along the outer side wall of the elastic bulges; the optical sending module is connected with one end of the optical fiber and is used for sending optical signals to the optical fiber; the optical receiving module is connected with the other end of the optical fiber and used for receiving the returned optical signal, converting the optical signal into an electric signal and amplifying the electric signal. Through above setting, can improve vital sign monitoring assembly's monitoring sensitivity and anti destructiveness.

Description

A vital sign monitoring assembly, device and system

technical field

Embodiments of the present invention relate to the technical field of medical monitoring, and in particular, to a vital sign monitoring component, device, and system.

Background technique

Home health monitoring is not only an extension and supplement of professional medical monitoring in hospitals, but also provides a long-term diagnosis basis for some diseases and early warning of some sudden diseases. At the same time, people's health awareness is becoming stronger and stronger, and the demand for family self-monitoring is also increasing day by day. Among them, for some cardiovascular diseases such as arrhythmia, too slow or too slow, the monitoring of heart rate can provide a reference basis; and real-time monitoring of respiration, for respiratory diseases such as apnea syndrome and emergency situations such as apnea and obstruction is also required. The monitoring of heart rate and respiration is particularly important for some elderly people with weakened autonomy.

The existing fiber-optic monitoring methods mainly include solutions such as fiber grating, fiber coherent, and fiber strength. Due to the high cost of fiber grating and fiber coherence, and the complex demodulation, it is not easy to implement in practical applications, and it is common in the market. It is a fiber intensity modulation solution.

The main principle of the optical fiber intensity modulation monitoring method is: the weak physiological motion and the optical fiber material cause the optical fiber to bend and deform, which does not satisfy the law of total reflection, so that the transmitted light intensity changes, and the light intensity change is monitored with a light detector. Among them, the optical fiber is easily affected by external disturbances, has low sensitivity, and the like, and the optical fiber is easily damaged by the outside world.

SUMMARY OF THE INVENTION

The main technical problem solved by the embodiments of the present invention is to provide a vital sign monitoring component, device and system with high monitoring sensitivity and good anti-destructive ability.

In order to solve the above-mentioned technical problems, the embodiment of the present invention provides a technical solution:

On the one hand, an embodiment of the present invention provides a vital sign monitoring component, and the vital sign monitoring component includes:

a sensing pad, comprising at least two elastic protrusions;

an optical fiber, which is wound around the at least two elastic protrusions, and the optical fiber is wound around the elastic protrusion at least once along the outer side wall of the elastic protrusion;

an optical transmission module, connected to one end of the optical fiber, and the optical transmission module is used for transmitting an optical signal to the optical fiber;

The light receiving module is connected to the other end of the optical fiber, and the light receiving module is used for receiving the returned light signal, converting it into an electrical signal and amplifying it.

In some embodiments, the sensing pad further includes a backing plate, and the at least two elastic protrusions are mounted on the backing plate.

In some embodiments, the backing plate is made of a flexible or elastic material.

In some embodiments, the elastic protrusions are cylindrical.

In some embodiments, the fiber is a multimode fiber.

In some embodiments, the optical fiber is wound around the elastic protrusion at least two times along the outer sidewall of the elastic protrusion.

In some embodiments, it is characterized in that it further comprises:

The first communication module is connected to the light receiving module, and the first communication module is used for receiving the electrical signal and sending the electrical signal to an external device.

In yet another aspect, an embodiment of the present invention further provides a vital sign monitoring device, the vital sign monitoring device comprising:

a carrier for carrying a human body or parts of a human body; and

The vital sign monitoring assembly as described above, wherein the vital sign monitoring assembly is mounted on the carrier.

In some embodiments, the carrier is a seat cushion, pillow or mattress.

On the other hand, an embodiment of the present invention also provides a vital sign monitoring system, where the vital sign monitoring system includes:

a second communication module, a cloud server and an intelligent terminal; and

The vital sign monitoring device as described above, wherein the first communication module, the second communication module, the cloud server and the intelligent terminal are connected in sequence, and the second communication module is used for receiving and processing the electrical signals to generate data results and Send the data to the cloud server, where the cloud server is used to store and analyze the data results, generate an analysis report and push it to the intelligent terminal, and the intelligent terminal is used to receive the analysis report pushed by the cloud server.

Compared with the prior art, in the embodiment of the present invention, the at least two elastic protrusions are provided, and the optical fiber is wound around the at least two elastic protrusions, wherein the optical fiber is along the elastic protrusions. The outer side wall of the outer wall is surrounded by the elastic protrusion at least once. On the one hand, the change of the optical signal of the optical fiber caused by the deformation of the elastic protrusion improves the monitoring sensitivity of the vital sign monitoring component, On the other hand, by using the elastic protrusion as a medium, foreign objects do not directly act on the optical fiber, which can prevent the optical fiber from being damaged by foreign objects, such as puncture by a sharp object, which leads to the breakage of the optical fiber, which improves the efficiency of the optical fiber. In addition, the cost of the vital signs monitoring module is low and easy to implement, and its versatility is strong, it has great scalability, it is easy to be implanted in various carriers, and it has a wide range of applications. market.

Description of drawings

One or more embodiments are exemplified by the pictures in the accompanying drawings, which are illustrative and do not limit the embodiments, and elements with the same reference numerals in the drawings are denoted as similar elements, Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

1 is a schematic diagram of a vital sign monitoring system according to an embodiment of the present invention;

2 is a schematic structural diagram of the optical fiber of FIG. 1 being wound around an elastic protrusion;

FIG. 3 is a schematic diagram of a vital sign monitoring device according to an embodiment of the present invention;

Fig. 4 is the signal time domain waveform collected by the vital sign monitoring device provided by the present invention;

FIG. 5 is a frequency domain waveform of a signal collected by the vital sign monitoring device provided by the present invention.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to"/"mounted on" another element, it can be directly on the other element, or there may be one or more intervening elements therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the present invention and simplifying the description, not to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of the present invention. The terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not used to limit the present invention. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

A vital sign monitoring assembly 1 provided in an embodiment of the present invention is used to monitor the vital signs of a human body, wherein the information of the vital signs may include at least one of heart rate, pulse, blood pressure and respiration By.

Referring to FIG. 1 and FIG. 2 , the vital sign monitoring assembly 1 includes a sensing pad 11 , an optical fiber 12 , a light transmitting module 13 and a light receiving module 14 . The sensing pad 11 includes at least two elastic protrusions 111 . The optical fiber 12 is wound around the at least two elastic protrusions 111 , and the optical fiber 12 is wound around the elastic protrusion 111 at least once along the outer sidewall of the elastic protrusion 111 . The optical transmission module 13 is connected to one end of the optical fiber 12 , and the optical transmission module 13 is used for transmitting an optical signal to the optical fiber 12 . The light receiving module 14 is connected to the other end of the optical fiber 12, and the light receiving module 14 is used for receiving the returned light signal, converting it into an electrical signal and amplifying it.

Wherein, when the elastic protrusion 111 is elastically deformed, the optical fiber 12 wound around the elastic protrusion 111 is acted by the elastic protrusion 111, and the curvature radius and refractive index of the optical fiber 12 change, Therefore, the light signal reflected to the light receiving module 14 fluctuates and changes, and the light receiving module 14 performs photoelectric conversion into a fluctuating electrical signal change.

In the vital sign monitoring assembly 1 provided by the embodiment of the present invention, by arranging the elastic protrusion 111 and winding the optical fiber 12 around the elastic protrusion 111, on the one hand, the optical fiber 12 can pass through the elastic protrusion 111. The optical signal changes due to the elastic deformation of the protrusion 111, which improves the monitoring sensitivity of the vital sign monitoring assembly 1. On the other hand, through the elastic protrusion 111 as a medium, foreign objects do not directly act on the optical fiber 12, The optical fiber 12 can be prevented from being damaged by foreign objects, such as the puncture of a sharp object, which leads to the breakage of the optical fiber 12, which improves the anti-damage capability of the vital signs monitoring assembly 1. In addition, the vital signs monitoring assembly 1 Low cost and easy to implement.

Wherein, setting the number of the elastic protrusions 111 to at least two can increase the force-bearing range of the sensing pad 11, and at the same time avoid fatigue damage when a single elastic protrusion 111 is used repeatedly; at the same time, Winding the optical fiber 12 around the elastic protrusions 111 at least once can make the optical fiber 12 and the at least two elastic protrusions 111 tightly connected, and prevent the optical fiber 12 from separating from the elastic protrusions 111 .

The vital sign monitoring component 1 of the embodiment of the present invention can realize real-time monitoring of respiration and heart rate by using an optical fiber intensity modulation monitoring method, and has strong anti-electromagnetic interference capability. Among them, for the optical fiber with abrupt refractive index, the calculation formula of macrobending loss per unit length is as follows:

in,

In the formula, R is the radius of curvature, λ is the operating wavelength of the light source, λ _cf is the cutoff frequency, Δ is the relative refractive index difference between the fiber core and the cladding, Δ=(n ₁ -n ₂ )/n ₂ .

From equations (1), (2), (3), it can be seen that the macrobending loss mainly depends on the radius of curvature, the refractive index and

When the working wavelength of the light source and the optical fiber are selected, the total macrobending loss L _s =α _c L, where L is the length of the optical fiber 12 wound around the elastic protrusion 111 . Combining with formula (1), it can be known that the total macrobending loss mainly depends on the radius of curvature and the length of the optical fiber 12 wound around the elastic protrusion 111 . The larger the curvature radius of the optical fiber 12, the smaller the total macrobending loss; the smaller the curvature radius of the optical fiber 12, the larger the total macrobending loss. When the elastic protrusion 111 is compressed and elastically expands, the radius of curvature of the optical fiber 12 wound around the elastic protrusion 111 increases accordingly; when the elastic protrusion 111 recovers elastic deformation, the optical fiber 12 wound around the elastic protrusion 111 increases The radius of curvature of the optical fiber 12 on the elastic protrusion 111 decreases accordingly. Wherein, the change of the curvature radius of the optical fiber 12 affects the total macrobending loss, which is finally reflected as the fluctuation of the returned optical signal.

In order to ensure the influence of the elastic protrusions 111 on the sensitivity of the curvature radius of the optical fiber 12 wound thereon, the elastic protrusions 111 are cylindrical, and the elastic protrusions 111 have elastic restoring force. When the elastic protrusion 111 is stressed in its own axial direction, it is compressed in its own axial direction and expands in its own radial direction. Through the above arrangement, when the elastic protrusions 111 are deformed under pressure, the optical fibers 12 wound around the elastic protrusions 111 are uniformly subjected to the outward expansion of the elastic protrusions 111 , so that the optical fibers 12 are evenly expanded. The light intensity of 12 has a good influence, ensuring the sensitivity of the part of the optical fiber 12 wound around the elastic protrusion 111 .

In some other embodiments of the present invention, the shape of the elastic protrusion 111 can be set according to actual needs, for example, a polygonal column shape.

The elastic protrusions 111 are made of rubber material, so that the elastic protrusions 111 have good elastic properties, and the hysteresis is not obvious, so that the vital signs monitoring component 1 can have a flat amplitude-frequency response curve in the low frequency band. Helps to capture the weak heartbeat vibration signal in the superimposed strong breathing signal.

The elastic protrusions 111 and the optical fibers 12 can be bonded to each other through an adhesive material to strengthen the connection between the elastic protrusions 111 and the optical fibers 12, thereby ensuring that the optical fibers 12 are wound around the elastic protrusions. Sensitivity from Part 111. Wherein, the bonding material may be epoxy resin, and the epoxy resin and the rubber material can achieve a better bonding effect.

In order to improve the sensitivity of the optical fiber 12 wound around the elastic protrusion 111 , the optical fiber 12 is wound around the elastic protrusion 111 at least twice along the outer side wall of the elastic protrusion 111 . By increasing the length of the optical fiber 12 wound around the elastic protrusion 111, the total macrobending loss of the optical fiber 12 is increased, so that the returned optical signal has a larger value. Fluctuations and changes make the vital sign monitoring assembly 1 have higher sensitivity.

In some embodiments of the present invention, the optical fiber 12 is wound around the elastic protrusion 111 and distributed from one end of the elastic protrusion 111 to the other end of the elastic protrusion, that is, the optical fiber 12 The number of turns around the elastic protrusion 111 is approximately along the axial direction of the elastic protrusion 111 to cover the elastic protrusion. Through the above settings, the length of the optical fiber 12 wound around the elastic protrusion 111 is further increased, thereby increasing the total macrobending loss of the optical fiber 12, so that the optical signal is finally reflected as the returned optical signal has greater fluctuations, so that the vital sign monitoring assembly 1 has higher sensitivity.

It can be understood that, in the vital sign monitoring assembly 1 in the embodiment of the present invention, the initial radius of the elastic protrusion 111 and the length of the optical fiber 12 wound around the elastic protrusion 111 can be respectively set, so as to realize the monitoring of the vital signs. The monitoring sensitivity of the vital sign monitoring component 1 is adjusted. The initial radius refers to the radius of the elastic protrusion 111 under no external force.

The sensing pad 11 further includes a backing plate 112 , and the at least two elastic protrusions 111 are mounted on the backing plate 112 . As shown in FIG. 1 , the at least two elastic protrusions 111 are distributed on one side of the backing plate 112 in a rectangular array, wherein the number of the elastic protrusions 111 can be selected according to actual needs, and only needs to be at least two That is, so that the vital sign monitoring assembly 1 can monitor a wide range of areas, in addition, the respective laws of the at least two elastic protrusions 111 can also be set according to actual needs, for example, distributed in a circular array, Triangular array distribution, etc. By arranging the backing plate 112 for installing the at least two elastic protrusions 111 , on the one hand, the optical fiber 12 can be wound around the at least two elastic protrusions 111 and then located at the back of the backing plate 112 . On the same side, the entanglement of optical cables is avoided. On the other hand, the relative position of each of the elastic protrusions 111 can be fixed, so that the sensing pad 11 can be easily installed on an external carrier as a whole, so as to facilitate a pair of the vital sign monitoring components. Human body is monitored.

In one embodiment of the present invention, the backing plate 112 is made of a flexible or elastic material, and the backing plate 112 has a certain degree of toughness, so as to improve the durability of the sensing pad 11 . Through the above arrangement, the backing plate 112 can be wound, thereby facilitating the accommodation of the sensing pad 11 and further facilitating the transportation of the vital sign monitoring assembly 1 . Wherein, the backing plate 112 may be made of rubber material.

For the above-mentioned optical fiber 12, the optical fiber 12 is a multi-mode optical fiber 12, and the optical cable of the multi-mode optical fiber 12 is relatively thick, and there can be various light wave modes propagating in the optical cable. When the radius of curvature of the optical fiber changes, it is more sensitive. It is beneficial to improve the monitoring of vital signs by the vital sign monitoring assembly 100 .

In one embodiment of the present invention, the vital sign monitoring assembly 1 further includes a first communication module 15, the first communication module 15 is connected to the light receiving module 14, and the first communication module 15 is used for receiving the The electrical signal is sent to an external device, so as to realize the connection between the vital sign monitoring component 1 and the external device, so that the monitoring information obtained by the vital sign monitoring component 1 is sent to the outside. In a specific implementation process, the first communication module 15 , the optical receiving module 14 and the optical transmitting module 13 may be integrated into the same module.

By using the vital sign monitoring component 100 provided by the embodiment of the present invention, a signal with a higher signal-to-noise ratio can be obtained, and by performing frequency domain analysis on the time domain signal, the frequency band peak range of respiration and heartbeat can be clearly obtained, and the real-time signal can be more accurately obtained. Extract vital sign information of breathing and heartbeat.

Referring to FIG. 3 , an embodiment of the present invention further provides a vital sign monitoring apparatus 2 . The vital sign monitoring apparatus 2 includes a carrier 21 and the vital sign monitoring assembly 1 as described above. The vital sign monitoring assembly 1 is mounted on the carrier 21 , and the carrier 21 is used for carrying a human body or a human body part. The carrier 21 acts as a medium in direct contact with the human body or parts of the human body. The pressure of the carrier 21 is stimulated with different frequencies by the fluctuation of respiration and the cardiac muscle pulsation, so that the elastic protrusion 111 expands or contracts and recovers, thereby affecting the surrounding area. The light intensity of the optical fiber 12 at the portion of the elastic protrusion 111 varies.

Specifically, the carrier 21 is a seat cushion, a pillow or a mattress, and the vital sign monitoring assembly 1 is disposed inside the carrier 21 , wherein the number of the at least two elastic protrusions 111 can be determined according to the carrier The specific structure of 21 is set. For example, when the carrier 21 is a mattress, the number of the elastic protrusions 111 can be appropriately large to obtain a larger monitoring area.

As shown in FIG. 4 , FIG. 4 shows a section obtained by even breathing collection of an adult lying on the pillow of the vital signs monitoring device 2 provided by the embodiment of the present invention with a sampling frequency of 50 Hz and using 32-bit unsigned shaped quantized data. time domain waveform. As shown in Figure 5, which shows that the frequency of adult breathing is 0.2-0.4 Hz (12-24 breaths in one minute), and the frequency of heartbeat is 0.6-2 Hz (36-120 beats in one minute), we will obtain The time-domain signal is Fourier-transformed to obtain the frequency-domain signal. As marked in Figure 5, there are obvious peaks near 0.18 Hz and 1.124 Hz, which correspond to the breathing signal and the heartbeat signal, respectively.

Referring to FIG. 1 again, an embodiment of the present invention further provides a vital sign monitoring system 3, where the vital sign monitoring system 3 includes a second communication module 31, a cloud server 32 and an intelligent terminal 33, and the vital sign monitoring as described above device 2. The first communication module 15, the second communication module 31, the cloud server 32 and the smart terminal 33 are connected in sequence, and the second communication module 31 is used to receive and process the electrical signals to generate data results and send them to the cloud server 32 , the cloud server 32 is configured to store and analyze the data results, generate an analysis report and push it to the intelligent terminal 33 , and the intelligent terminal 33 is configured to receive the analysis report pushed by the cloud server 32 .

Wherein, by disposing the first communication module 15 and the second communication module 31 separately, the coupling of the system can be reduced, the structure of the vital sign monitoring assembly 1 can be simplified, and the safety and stability can be improved.

The communication connection between the first communication module 15 and the second communication module 31 may be performed through wireless communication technologies such as but not limited to Bluetooth and Wi-Fi. The communication connection between the second communication module 31 and the cloud server 32 may be performed through a wireless communication technology such as, but not limited to, Wi-Fi.

The smart terminal 33 may be, but not limited to, a smart phone, a wearable device, a tablet computer, a portable computer, other portable computing devices, or a remote server. The intelligent terminal 33 can check the analysis report pushed by the serverless to check the results, so as to realize visual monitoring. When there is an abnormality in the vital sign data information in the analysis report, an alarm can be made through the smart terminal 33, for example, an alarm can be made through vibration, an alarm bell, and the like.

Wherein, the vital sign data information obtained by monitoring can be stored in the cloud server 32 so as to provide a basis for the diagnosis of later medical treatment.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A vital signs monitoring assembly, comprising:

a sensor mat comprising at least two resilient projections;

the optical fiber is wound on the at least two elastic bulges and is wound at least one circle along the outer side wall of the elastic bulges;

an optical transmission module connected to one end of the optical fiber, the optical transmission module being configured to transmit an optical signal to the optical fiber;

and the light receiving module is connected with the other end of the optical fiber and is used for receiving the returned light signal, converting the returned light signal into an electric signal and amplifying the electric signal.

2. The vital signs monitoring assembly of claim 1, wherein the sensing pad further comprises a backing plate, the at least two resilient projections being mounted to the backing plate.

3. Vital signs monitoring assembly according to claim 2, wherein the pad is made of a flexible or elastic material.

4. The vital signs monitoring assembly of claim 1, wherein the resilient tab is cylindrical.

5. The vital signs monitoring assembly of claim 1, wherein the optical fiber is a multimode optical fiber.

6. The vital signs monitoring assembly of claim 1, wherein the optical fiber is wrapped around the resilient projection for at least two turns along an outer sidewall of the resilient projection.

7. Vital signs monitoring assembly according to any one of claims 1-6, further comprising:

and the first communication module is connected with the light receiving module and is used for receiving the electric signal and sending the electric signal to external equipment.

8. A vital signs monitoring device, comprising:

a carrier for carrying a human body or a part of a human body; and

the vital signs monitoring assembly of any one of claims 1-7, wherein the vital signs monitoring assembly is mounted to the carrier.

9. Vital signs monitoring device according to claim 8, wherein the carrier is a seat cushion, pillow or mattress.

10. A vital signs monitoring system, comprising:

the system comprises a second communication module, a cloud server and an intelligent terminal; and

the vital sign monitoring device according to any one of claims 8 or 9, wherein the first communication module, the second communication module, the cloud server, and the smart terminal are sequentially connected, the second communication module is configured to receive and process the electrical signal to generate a data result and send the data result to the cloud server, the cloud server is configured to store and analyze the data result, generate an analysis report, and push the analysis report to the smart terminal, and the smart terminal is configured to receive the analysis report pushed by the cloud server.

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