CN113616173A - Vital sign monitoring device and method based on multiple optical fiber sensing assemblies - Google Patents
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Abstract
The invention provides a vital sign monitoring device and a method based on a plurality of optical fiber sensing assemblies, wherein the vital sign monitoring device is formed by arranging the optical fiber sensing assemblies, so that the optical fiber sensing assemblies have smaller specifications and are easy to transport, store and carry on the basis of effectively increasing the detection range; the effective detection range can be expanded to the whole lying area of the user during sleeping and resting, so that the user can select any direction and any area for resting during resting, and the user can use the bed more conveniently and feels less; the sleeping posture, the bed position and whether the user turns over can be monitored in real time, and the sleeping quality analysis can be better carried out; the multi-channel BCG signals can be measured simultaneously, the multi-channel signals are processed, noise can be effectively reduced, algorithm calculation is facilitated, and therefore more accurate vital sign data are obtained; the double-person vital sign data monitoring system can monitor double vital sign data and is more suitable for common families.
Description
Technical Field
The invention relates to the field of human body vital sign monitoring, in particular to a vital sign monitoring device and method based on a plurality of optical fiber sensing assemblies.
Background
With the development of social and economic technologies and the improvement of requirements of people on living quality, the demand of people on self health detection is continuously increased. The health of a human body can be reflected from the breathing rate and the heart rate. In addition, experts point out that reasonable sleeping postures are selected, so that the sleeping pillow not only can have a good rest, but also can keep health, and plays a role in preventing and treating diseases; the health benefits of different sleeping positions vary for persons with different needs. Patients with gastric ulcer, gastritis and digestive dysfunction preferably sleep towards the right side, but patients with reflux oesophagus are suitable for sleeping towards the left side; patients with hepatitis and liver cirrhosis are suitable for lying on the back or on the left, and the sleeping posture can avoid the oppression on the diseased part; the nasal plug is best to sleep on the side; the patient with hypertension should adopt the supine sleeping position. Therefore, realizing daily real-time monitoring of the respiratory rate, the heart rate and the sleeping posture has important significance for human health assessment and disease prevention.
The Ballistocardiogram (BCG) is derived from the mechanical contraction of the heart and the reaction force on the body caused by the sudden acceleration of the blood in the large blood vessels, so that the heart rate and the respiration rate can be extracted based on the BCG signal, and the sleeping posture of the user can be restored through algorithm processing.
Domestic researchers mainly design BCG signal acquisition equipment based on a micro-sensitive mattress, a piezoelectric film, a resistance type strain sensor, a piezoelectric ceramic sensor, an optical fiber sensor and the like. At present, BCG signal acquisition equipment based on the optical fiber sensing principle is mostly composed of a single optical fiber sensing assembly, wherein BCG signals are acquired in the single optical fiber sensing assembly in a partitioning mode to monitor heart rate and respiratory rate, and the function of monitoring the heart rate and the respiratory rate is achieved.
However, the existing devices generally have the problems of high noise, low signal-to-noise ratio and limited range of the single optical fiber sensing component for monitoring vital signs. When the device is used by a user, very weak physical movement can cause large noise, and the monitored vital sign data is inaccurate. In addition, most vital sign monitoring devices based on a single optical fiber sensing component are used for monitoring the breathing rate and the heart rate of vital signs, cannot accurately monitor the sleeping posture and the bed position of a user in real time, are generally used for a single user, and are limited in use range.
Disclosure of Invention
In view of the above, the invention provides a vital sign monitoring device and method based on a plurality of optical fiber sensing assemblies, which have a large detection range, can monitor the sleeping posture and the bed position of a user in real time and realize the function of monitoring double vital signs based on the plurality of optical fiber sensing assemblies, and improve the signal-to-noise ratio of the vital sign monitoring device, so that the monitored vital sign data is more accurate.
The technical scheme of the invention is realized as follows:
on one hand, the invention provides a vital sign monitoring device based on a plurality of optical fiber sensing assemblies, which comprises a plurality of laser light sources, at least two optical fiber sensing assemblies, a plurality of photoelectric conversion modules, a vital sign signal extraction and analysis module, a communication module, a cloud platform and a user side, wherein each optical fiber sensing assembly comprises a film and a sensing optical fiber, and the sensing optical fiber is arranged on the surface of the film;
the laser light source emits laser to the sensing optical fiber of the optical fiber sensing assembly;
each optical fiber sensing assembly is arranged in a matrix form on a horizontal plane;
the sensing optical fibers in the optical fiber sensing assemblies are respectively connected with the laser light sources and the photoelectric conversion modules in a one-to-one correspondence mode, and optical signals transmitted in the sensing optical fibers are affected by vibration and pressure of a human body, are lost and are modulated;
the photoelectric conversion module is connected with the vital sign signal extraction and analysis module and converts the optical signal into an electric signal, so that the vital sign signal extraction and analysis module can analyze and process the signal conveniently, and the electric signal is a BCG signal;
the vital sign signal extraction and analysis module extracts vital sign information from the BCG signal and analyzes the sleeping posture and bed position information of the user;
the communication module is connected with the vital sign signal extraction and analysis module and the cloud platform;
the cloud platform stores and analyzes the vital sign information obtained by the vital sign signal extraction and analysis module, the sleeping posture and the in-bed position information of the user, sends the information to the user side, sends safety alarm information when the vital sign of the user is abnormal or is at the edge of the bed, and sends reminding alarm information when the user has a rest in an unhealthy sleeping posture.
On the basis of the technical scheme, preferably, the optical fiber sensing assembly is provided with more than 12 pieces which are arranged on the mattress in a matrix manner.
On the basis of the technical scheme, preferably, the optical fiber sensing assemblies are respectively fixed on the flexible braided material.
In a second aspect, the present invention provides a vital signs monitoring device and method based on a multi-fiber sensing assembly, wherein the vital signs monitoring device according to the first aspect of the present invention comprises the following steps,
respectively fixing a plurality of optical fiber sensing assemblies on a mattress, and establishing a plane layout of the mattress and the optical fiber sensing assemblies;
when a person lies on the mattress, the sensing optical fibers corresponding to the optical fiber sensing assemblies in the mattress can be extruded, optical signals transmitted in the sensing optical fibers are lost and modulated, the vital sign signal extraction and analysis module detects the light output power of each optical fiber sensing assembly, and the light output power is smaller than a threshold value P0The optical fiber sensing assembly displays the color difference on the plane layout drawing, and the sleeping posture and the in-bed position information of the user can be acquired by observing the color difference area in the plane layout drawing.
On the basis of the technical scheme, preferably, the color difference area of the plane layout diagram of the healthy sleeping posture state of the user is stored, compared with the color difference area of the plane layout diagram of the healthy sleeping posture state of the user, obtained in real time, the unhealthy sleeping posture rest situation is checked out, and reminding warning information is sent through the cloud platform.
On the basis of the technical scheme, preferably, the light emitting power of each optical fiber sensing component is detected through the vital sign signal extraction and analysis module, the optical fiber sensing component corresponding to the body gravity center of the user in the sleeping posture is calculated through the light emitting power, and safety alarm information is sent when the optical fiber sensing component corresponding to the body gravity center is close to the edge of the mattress.
On the basis of the technical scheme, preferably, if the user moves, the vital sign signal extraction and analysis module detects the short-time energy of each optical fiber induction component, and the turning direction of the user is that the short-time energy is higher than the threshold value PhFalls below a threshold value PlThe corresponding optical fiber sensing component is turned to be lower than the threshold value P when the short-time energy is lower thanlRises above a threshold value PhThe corresponding optical fiber sensing component.
On the basis of the above technical solution, preferably, after performing smooth filtering processing on the signal output by each optical fiber sensing assembly, the energy E of the signal output by each optical fiber sensing assembly is calculated respectivelyiAnd the autocorrelation coefficient RiWill simultaneously satisfy energy Ei﹥Threshold value E0And the autocorrelation coefficient Ri﹥Threshold value R0The signal of (2) is judged to be a signal with relatively good signal quality, otherwise, the signal of (3) is judged to be a signal with relatively poor signal quality; then, selecting a signal with relatively good signal quality, performing wavelet transformation, performing weighted average by using different weighting coefficients to respectively obtain a signal mainly containing the heart rate and a signal mainly containing the respiration rate, and performing Fourier transformation on the two paths of signals to respectively obtain the heart rate and the respiration rate.
On the basis of the technical scheme, preferably, the color difference area in the plane layout is observed to obtain the number of users on the mattress; after the signals output by each optical fiber sensing assembly are subjected to smooth filtering processing, the energy E of the signals output by each optical fiber sensing assembly is calculated respectivelyiAnd the autocorrelation coefficient RiWill simultaneously satisfy energy Ei﹥Threshold value E0And the autocorrelation coefficient Ri﹥Threshold value R0The signal of (2) is judged to be a signal with relatively good signal quality, otherwise, the signal of (3) is judged to be a signal with relatively poor signal quality; then selects the signal qualityThe signals with relatively good quantity are subjected to wavelet transformation, and then the signals are grouped by adopting a cross-correlation coefficient judgment method to distinguish the signals corresponding to each user on the mattress; and finally, carrying out weighting average on signals corresponding to each user by using different weighting coefficients to respectively obtain signals mainly comprising heart rate and signals mainly comprising respiration rate, and carrying out Fourier transform on the two paths of signals to respectively obtain the heart rate and the respiration rate.
Further preferably, when the i-th optical fiber sensing component signal and the j-th optical fiber sensing component signal have cross-correlation coefficient Ri,j﹥Threshold value R0,0And then, the two paths of signals are divided into a group of signals, and the corresponding users are obtained according to the analysis of the optical fiber sensing assemblies corresponding to the signals.
Compared with the prior art, the vital sign monitoring device and method based on the multiple optical fiber sensing assemblies have the following beneficial effects:
(1) compared with a single optical fiber sensing assembly, the vital sign monitoring device formed by arranging the optical fiber sensing assemblies has smaller specification and is easy to transport, store and carry on the basis of effectively increasing the detection range;
(2) the effective detection range can be expanded to the whole lying area of the user during sleeping and resting, so that the user can select any direction and any area for resting during resting, and the user can use the bed more conveniently and feels less;
(3) the sleeping posture, the bed position and whether the user turns over can be monitored in real time through the optical fiber sensing assemblies, so that the sleeping quality analysis can be better carried out, and the monitoring device can also be used for monitoring infants;
(4) through the plurality of optical fiber sensing assemblies, a plurality of BCG signals can be measured at the same time, the plurality of BCG signals are processed, noise can be effectively reduced, algorithm calculation is facilitated, and therefore more accurate vital sign data can be obtained;
(5) through the plurality of optical fiber sensing assemblies, the vital sign data of double persons can be monitored, and the optical fiber sensing assembly is more suitable for common families;
(6) the vital sign monitoring device has the advantages of simple structure, easy realization, low manufacturing cost, reliable operation, high sensitivity, real-time detection, easy signal demodulation and the like, can be arranged in daily necessities such as a cushion, a mattress, an insole or a pillow and the like, is convenient for a user to monitor the physical condition of the user in real time in daily work and life, and can inform family members and medical care personnel in time in emergency, thereby avoiding the occurrence of accidents.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the connection of a multi-fiber optic sensor assembly-based device of the present invention;
FIG. 2 is a schematic top view of the fiber optic sensor assembly of the present invention;
FIG. 3 is a schematic plan view of the present invention for monitoring the sleeping posture of a user, wherein the numbers with circles in the drawing represent the numbers of the optical fiber sensing components;
FIG. 4 is a schematic flow chart of the algorithm for calculating the heart rate and the respiration rate of a single user according to the present invention;
FIG. 5 is a schematic diagram of the present invention for monitoring vital signs of two users, wherein the numbers with circles in the diagram represent the numbers of the fiber sensing assemblies;
FIG. 6 is a schematic diagram of the algorithm for calculating the heart rate and the respiratory rate of two users according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, with reference to fig. 2 and 4, the vital sign monitoring device based on multiple optical fiber sensing assemblies of the present invention includes a plurality of laser light sources 1, at least two optical fiber sensing assemblies 2, a plurality of photoelectric conversion modules 3, a vital sign signal extraction and analysis module 4, a communication module 5, a cloud platform 6, and a user end 7.
The laser light source 1 emits laser light into the sensing optical fiber 22 of the optical fiber sensing assembly 2. Preferably, the laser light source 1 includes, but is not limited to, a coherent light source, which may be a part of the prior art. Still further preferably, the plurality of laser light sources 1 use coherent light sources of the same specification. Specifically, in order to reduce the cost, the laser light sources 1 are obtained by splitting one laser light source by a splitter.
The optical fiber sensing assembly 2 comprises a film 21 and a sensing optical fiber 22, wherein the sensing optical fiber 22 is arranged on the surface of the film 21.
The film 21 is used for supporting the sensing optical fiber 22. The film 21 is made of a soft material. Preferably, the soft material is silica gel or textile fabric, and the film 21 can be deformed when being pressed. Further preferably, the film 21 may also be a polyethylene film, and such a film 21 not only has a flexible protection function, but also has moisture resistance and small moisture permeability, and even ensures the dryness of the sensing optical fiber 21.
The sensing optical fibers 22 are respectively connected with the laser light sources 1 and the photoelectric conversion modules 3 in a one-to-one correspondence manner, and optical signals transmitted in the sensing optical fibers 22 are affected by vibration and pressure of a human body, are subjected to loss and are modulated. Specifically, the sensing fiber 22 includes, but is not limited to, a common communication glass fiber single mode fiber, a common communication glass fiber multi-mode fiber, and a plastic fiber. It is further preferred that the sensing fiber 22 include a curved row wire segment routing in an "S" shape. Specifically, the common communication glass fiber single-mode optical fiber is adopted to be in S-shaped bent wiring.
In order to improve the sensitization effect, the optical fiber sensing component 2 further comprises a sensitization device 23, and the invention adopts a hard wire as the sensitization device. Preferably, the hard wire can be made of nylon materials, steel wires or optical fibers, and the diameter of the hard wire is 0.4-1 mm. The sensitivity enhancing device 23 presses the sensing optical fiber 22 on the surface of the film 21 and fixes the sensing optical fiber with transparent glue or glue.
Specifically, the optical fiber sensing assembly 2 composed of the film 21, the sensing optical fiber 22 and the sensitization device 23 is disposed in, but not limited to, a cushion, a mattress, an insole and a pillow. Further preferably, in a mattress.
Specifically, because the glass fiber optic fibre can not excessively bend and discount, there is the problem that is difficult for transportation, storage and carrying in the vital sign monitoring devices that single optic fibre response subassembly 2 constitutes, has increased transportation and storage cost. The invention adopts the plurality of optical fiber sensing assemblies 2, so that the specification of the optical fiber sensing assemblies 2 is smaller on the basis of effectively increasing the detection range, and the blocks can be folded and are easier to transport, store and carry. In particular, the fiber sensing assemblies 2 are of the same size, which reduces cost
Specifically, the plurality of optical fiber sensing assemblies 2 may adopt several layouts including, but not limited to, the following layouts: an up-down layout, a left-right layout or a combined up-down and left-right layout. Further preferably, the layout is selected in a combination of up-down and left-right. Specifically, each optical fiber sensing assembly 2 is arranged in a matrix form on the horizontal plane. Preferably, the optical fiber sensing assembly 2 is provided with more than 12 pieces which are arranged on the mattress in a matrix manner. Preferably, the optical fiber sensing assemblies 2 are respectively fixed on the flexible woven material, so that the blocks can be folded, transported, stored and carried conveniently.
Specifically, the existing vital sign monitoring device needs a user to lie in a fixed area in a fixed direction during rest when in use, and has the problem of inconvenient use and the like. According to the vital sign monitoring device, the twelve optical fiber sensing assemblies are arranged in a mode of combining up and down and left and right, and compared with a single optical fiber sensing assembly, the vital sign monitoring device adopting the structural arrangement can expand the effective detection range to the whole lying area when a user lies down for rest, so that the user can select any direction and area for rest, does not need to deliberately lie in a fixed area in a certain direction, and is more convenient and insensitive to use.
Further preferably, the twelve optical fiber sensing assemblies 2 are independent from each other when measuring signals, and the measured signals do not interfere with each other.
Further preferably, the signals measured by the twelve fiber-optic sensing assemblies 2 are synchronized in the time domain.
In particular, the sensing fiber 22 of the fiber sensing assembly 2 can be modulated by external influences, including but not limited to non-wearable and non-invasive.
And the vital sign signal extraction and analysis module 4 is used for extracting vital sign information from the BCG signal and analyzing the sleeping posture and the bed position information of the user.
And the communication module 5 is connected with the vital sign signal extraction and analysis module 4 and the cloud platform 6. Including but not limited to modules adopting wired communication modes and wireless communication modes such as bluetooth communication, WIFI communication, mobile communication and the like. Preferably, a WIFI communication module is employed.
The cloud platform 6 is used for storing and analyzing the vital sign information obtained by the vital sign signal extraction and analysis module 4, the sleeping posture and the in-bed position information of the user, sending safety alarm information to the user side 7 when the vital sign of the user is abnormal or is at the edge of the bed, and sending reminding alarm information when the user has a rest in an unhealthy sleeping posture.
The multi-fiber sensing assembly-based vital sign monitoring method is described below with reference to specific embodiments.
In the first embodiment, the sleeping posture and the bed position information of the user are detected.
And respectively fixing a plurality of optical fiber sensing assemblies 2 on the mattress, and establishing a plan layout of the mattress and the optical fiber sensing assemblies 2. Specifically, in this process, each fiber sensing component 2 is numbered and divided into coordinates, as shown in fig. 3.
When a person lies on the mattress, the sensing optical fibers 22 corresponding to the optical fiber sensing assemblies 2 in the mattress are extruded, optical signals transmitted in the sensing optical fibers 22 are modulated due to loss, the vital sign signal extraction and analysis module 4 detects the light output power of each optical fiber sensing assembly 2, and the light output power is smaller than a threshold value P0The optical fiber sensing component 2 displays the color difference on the plane layout drawing, and the sleeping posture and the in-bed position information of the user can be obtained by observing the color difference area in the plane layout drawing. It should be noted that the optical fiber sensing assemblies 2 do not interfere with each other.
Through real-time data analysis, the sleeping posture and the bed position of the user can be obtained in real time, and whether the user has a rest at the safe position on the bed with the healthiest sleeping posture or not can be found conveniently. Specifically, if the number of the optical fiber sensing assemblies is increased, the sleeping posture and the specific position of the user in the bed can be detected more carefully.
Specifically, the color difference area of the plane layout diagram of the healthy sleeping posture state of the user is stored, and compared with the color difference area of the plane layout diagram of the healthy sleeping posture state of the user, the unhealthy sleeping posture rest situation is checked out, and reminding warning information is sent through the cloud platform 6.
Specifically, the optical power of each optical fiber sensing assembly 2 is detected by the vital sign signal extraction and analysis module 4. The light-emitting power of the optical fiber sensing component 2 and the weight pressed on the surface of the optical fiber sensing component 2 are in a certain linear proportional relation, so that the optical fiber sensing component 2 corresponding to the body gravity center of a user in the sleeping posture can be calculated through the light-emitting power of the optical fiber sensing component 2, and safety alarm information is sent when the optical fiber sensing component 2 corresponding to the body gravity center is close to the edge of the mattress.
In the second embodiment, the turning direction of the user is detected.
If the user moves, the vital sign signal extraction and analysis module 4 detects the short-time energy of each optical fiber induction component 2, and the turning direction of the user is that the short-time energy is higher than a threshold value PhFalls below a threshold value PlThe corresponding optical fiber sensing component 2 is overturned to the short-time energy lower than the threshold value PlRises above a threshold value PhTo what is providedThe corresponding fiber optic sensing component 2.
The sleeping posture, the bed position, whether the user turns over and the like of the user are monitored in real time, the sleeping condition of the user all night is restored, and the sleeping quality analysis is conveniently and better carried out. In particular, the system can also be used for monitoring infants.
In the third embodiment, the heart rate and the respiratory rate are detected.
Specifically, as shown in fig. 4, the vital sign signal extraction and analysis module 4 detects the heart rate and the respiratory rate in the following manner:
in this embodiment, twelve optical fiber sensing assemblies 2 are arranged, so that when a person lies on the mattress, twelve optical fiber sensing assemblies 2 measure signals containing vital sign information of different parts of the person at the same time, and a total of twelve signals are generated.
After the smooth filtering processing is performed on the signal output by each optical fiber sensing assembly 2, the energy E of the signal output by each optical fiber sensing assembly 2 is calculated respectivelyiAnd the autocorrelation coefficient RiWill simultaneously satisfy energy Ei﹥Threshold value E0And the autocorrelation coefficient Ri﹥Threshold value R0The signal of (2) is judged to be a signal with relatively good signal quality, otherwise, the signal of (3) is judged to be a signal with relatively poor signal quality; then, selecting a signal with relatively good signal quality, performing wavelet transformation, performing weighted average by using different weighting coefficients to respectively obtain a signal mainly containing the heart rate and a signal mainly containing the respiration rate, and performing Fourier transformation on the two paths of signals to respectively obtain the heart rate and the respiration rate.
Twelve signals are obtained by adopting the twelve optical fiber sensing assemblies 12, the signal-to-noise ratio of the signals is improved through weighted average, the influence of noise interference is effectively reduced, and more accurate vital sign data can be obtained conveniently. And the interference of inaccurate monitoring data caused by the body movement of the user can be effectively reduced based on the principle.
Fourth, double people are monitored for vital signs.
If the single optical fiber sensing assembly 2 is used for monitoring two users, the vital sign signals of the two users are mutually interfered, and the vital sign information of the two users cannot be obtained respectively. If two users are monitored respectively by two independent optical fiber sensing assemblies 2 on a bed, although the vital sign information of the two users can be obtained respectively, the two optical fiber sensing assemblies have interference, especially when one of the optical fiber sensing assemblies has large body movement, the other optical fiber sensing assembly can cause large interference, so that the signal quality obtained by the two optical fiber sensing assemblies 2 is poor, and the problems of inaccurate monitoring and the like occur.
In view of this, still take twelve optical fiber sensing assemblies 2 as an example to monitor the vital signs of two persons, the principle is as follows:
as shown in fig. 5, the number of users on the mattress is obtained by observing the color difference area in the plan layout; as shown in fig. 6, after the signal output by each optical fiber sensing assembly 2 is subjected to smoothing filtering, the energy E of the signal output by each optical fiber sensing assembly 2 is calculated respectivelyiAnd the autocorrelation coefficient RiWill simultaneously satisfy energy Ei﹥Threshold value E0And the autocorrelation coefficient Ri﹥Threshold value R0The signal of (2) is judged to be a signal with relatively good signal quality, otherwise, the signal of (3) is judged to be a signal with relatively poor signal quality; then selecting a signal with relatively good signal quality, performing wavelet transformation, grouping the signals by adopting a cross-correlation coefficient judgment method, and distinguishing signals corresponding to each user on the mattress; and finally, carrying out weighting average on signals corresponding to each user by using different weighting coefficients to respectively obtain signals mainly comprising heart rate and signals mainly comprising respiration rate, and carrying out Fourier transform on the two paths of signals to respectively obtain the heart rate and the respiration rate.
Specifically, when the cross-correlation coefficient R of the ith optical fiber sensing component signal and the jth optical fiber sensing component signali,j﹥Threshold value R0,0During the process, the two paths of signals are divided into a group of signals, and then the corresponding user is obtained through analysis according to the optical fiber sensing component 2 corresponding to the signals, so that the signal of which the user A is and the signal of which the user B is can be distinguished.
In the aspect of the physical activity of two users of monitoring, although the physical activity can interfere with each other, if user A moves at the body, then can appear the signal change earlier from the nearer optic fibre response subassembly 2 of user A, just then can transmit all the other optic fibre response subassemblies 2, the event measures the time sequence that the signal changed according to the optic fibre response subassembly 2 that corresponds, and it is the first emergence from which optic fibre response subassembly 2 that very easily judges that user's physical activity, so can judge that which user is moving towards which direction. Therefore, the device based on the twelve optical fiber sensing assemblies 2 realizes the functions of monitoring vital signs of double persons, determining whether the person moves and whether the person is in bed and the like, and is more suitable for common families.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A vital sign monitoring device based on a plurality of optical fiber sensing assemblies comprises a plurality of laser light sources (1), at least two optical fiber sensing assemblies (2), a plurality of photoelectric conversion modules (3), a vital sign signal extraction and analysis module (4), a communication module (5), a cloud platform (6) and a user side (7), wherein each optical fiber sensing assembly (2) comprises a film (21) and a sensing optical fiber (22), and the sensing optical fiber (22) is arranged on the surface of the film (21); the method is characterized in that:
the laser light source (1) emits laser into a sensing optical fiber (22) of the optical fiber sensing component (2);
each optical fiber sensing component (2) is arranged in a matrix form on a horizontal plane;
the sensing optical fibers (22) in each optical fiber sensing component (2) are respectively connected with the laser light source (1) and the photoelectric conversion module (3) in a one-to-one correspondence manner, and optical signals transmitted in the sensing optical fibers (22) are affected by vibration and pressure of a human body, are lost and are modulated;
the photoelectric conversion module (3) is connected with the vital sign signal extraction and analysis module (4) and converts the optical signal into an electric signal, so that the vital sign signal extraction and analysis module (4) can analyze and process the signal conveniently, and the electric signal is a BCG signal;
the vital sign signal extraction and analysis module (4) extracts vital sign information from the BCG signal and analyzes the sleeping posture and in-bed position information of the user;
the communication module (5) is connected with the vital sign signal extraction and analysis module (4) and the cloud platform (6);
the cloud platform (6) is used for storing and analyzing the vital sign information obtained by the vital sign signal extraction and analysis module (4), the sleeping posture and the in-bed position information of the user, sending the information to the user side (7), sending safety alarm information when the vital sign of the user is abnormal or is at the edge of the bed, and sending reminding alarm information when the user has a rest in an unhealthy sleeping posture.
2. The multi-piece fiber optic sensing assembly-based vital signs monitoring device of claim 1, wherein: the optical fiber sensing assembly (2) is provided with more than 12 blocks, and the optical fiber sensing assembly are arranged on the mattress in a matrix mode.
3. The multi-piece fiber optic sensing assembly-based vital signs monitoring device of claim 1, wherein: the optical fiber sensing assemblies (2) are respectively fixed on the flexible woven material.
4. A vital sign monitoring device and method based on a plurality of optical fiber sensing assemblies are characterized in that: the vital signs monitoring device of claim 1, comprising the steps of,
respectively fixing a plurality of optical fiber sensing assemblies (2) on a mattress, and establishing a plane layout of the mattress and the optical fiber sensing assemblies (2);
when a person lies on the mattress, the sensing optical fibers (22) corresponding to the optical fiber sensing assemblies (2) in the mattress are extruded, optical signals transmitted in the sensing optical fibers (22) are lost and modulated, the vital sign signal extraction and analysis module (4) detects the light output power of each optical fiber sensing assembly (2), and the light output power is smaller than a threshold value P0The optical fiber sensing component (2) displays the color difference on the plane layout drawing, and the sleeping posture and the in-bed position information of the user can be acquired by observing the color difference area in the plane layout drawing.
5. The multi-fiber optic sensing assembly-based vital signs monitoring device and method of claim 4, wherein: and storing the color difference area of the plane layout diagram of the healthy sleeping posture state of the user, comparing the color difference area with the color difference area of the plane layout diagram of the healthy sleeping posture state of the user, checking the unhealthy sleeping posture rest situation, and sending reminding warning information through the cloud platform (6).
6. The multi-fiber optic sensing assembly-based vital signs monitoring device and method of claim 4, wherein: the light emitting power of each optical fiber sensing component (2) is detected through the vital sign signal extraction and analysis module (4), the optical fiber sensing component (2) corresponding to the body gravity center of the user in the sleeping posture is calculated through the light emitting power, and safety alarm information is sent when the optical fiber sensing component (2) corresponding to the body gravity center is close to the edge of the mattress.
7. The multi-fiber optic sensing assembly-based vital signs monitoring device and method of claim 4, wherein: if the user moves, the vital sign signal extraction and analysis module (4) detects the short-time energy of each optical fiber induction component (2), and the turning direction of the user is that the short-time energy is higher than a threshold value PhFalls below a threshold value PlThe corresponding optical fiber sensing component (2) is turned to the state that the short-time energy is lower than the threshold value PlRises above a threshold value PhThe corresponding optical fiber sensing component (2).
8. The multi-fiber optic sensing assembly-based vital signs monitoring device and method of claim 4, wherein: after the signals output by each optical fiber sensing assembly (2) are subjected to smooth filtering processing, the energy E of the signals output by each optical fiber sensing assembly (2) is calculated respectivelyiAnd the autocorrelation coefficient RiWill simultaneously satisfy energy Ei﹥Threshold value E0And the autocorrelation coefficient Ri﹥Threshold value R0The signal of (2) is judged to be a signal with relatively good signal quality, otherwise, the signal of (3) is judged to be a signal with relatively poor signal quality; then selecting the signal with relatively good signal quality to make wavelet transformation, then using different weighting coefficients to make additionAnd respectively obtaining a signal mainly comprising the heart rate and a signal mainly comprising the respiratory rate by the weighted average, and then respectively obtaining the heart rate and the respiratory rate by carrying out Fourier transform on the two paths of signals.
9. The multi-fiber optic sensing assembly-based vital signs monitoring device and method of claim 4, wherein: observing a color difference area in the plane layout to obtain the number of users on the mattress; after the signals output by each optical fiber sensing assembly (2) are subjected to smooth filtering processing, the energy E of the signals output by each optical fiber sensing assembly (2) is calculated respectivelyiAnd the autocorrelation coefficient RiWill simultaneously satisfy energy Ei﹥Threshold value E0And the autocorrelation coefficient Ri﹥Threshold value R0The signal of (2) is judged to be a signal with relatively good signal quality, otherwise, the signal of (3) is judged to be a signal with relatively poor signal quality; then selecting a signal with relatively good signal quality, performing wavelet transformation, grouping the signals by adopting a cross-correlation coefficient judgment method, and distinguishing signals corresponding to each user on the mattress; and finally, carrying out weighting average on signals corresponding to each user by using different weighting coefficients to respectively obtain signals mainly comprising heart rate and signals mainly comprising respiration rate, and carrying out Fourier transform on the two paths of signals to respectively obtain the heart rate and the respiration rate.
10. The multi-fiber optic sensing assembly-based vital signs monitoring device and method of claim 9, wherein: when the cross-correlation coefficient R of the ith optical fiber sensing component signal and the jth optical fiber sensing component signali,j﹥Threshold value R0,0And meanwhile, dividing the two paths of signals into a group of signals, and analyzing according to the optical fiber sensing component (2) corresponding to the signals to obtain the corresponding user.
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