CN116058828A - Sport health monitoring device - Google Patents
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- CN116058828A CN116058828A CN202211630351.1A CN202211630351A CN116058828A CN 116058828 A CN116058828 A CN 116058828A CN 202211630351 A CN202211630351 A CN 202211630351A CN 116058828 A CN116058828 A CN 116058828A
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
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- A—HUMAN NECESSITIES
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- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/112—Gait analysis
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Abstract
The present disclosure relates to a sports health monitoring device, the device comprising: the portable device comprises a light emitting module, a light receiving module and an output module; the light emitting module is used for generating an original light signal with constant intensity; the sensing optical fiber comprises a first plastic optical fiber, a signal modulation part and a second plastic optical fiber which are connected in sequence; the light receiving module is used for collecting the modulated light signals to obtain collected data; the output module is used for outputting the motion information of the monitored part obtained according to the acquired data.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of optical fiber sensing, and more particularly relates to a sports health monitoring device.
Background
Life expectancy continues to increase as living conditions improve and medical care advances. Aging of society has led to an increase in health monitoring demands, requiring the establishment of a continuous, dynamic health monitoring system to assess human health. And wherein monitoring of respiratory heart rate and gait is particularly important. Cardiovascular and cerebrovascular diseases have become a major threat to human health. Respiratory diseases are also classified by the world health organization as one of four major chronic diseases. Monitoring of the respiratory heart rate may be effective in preventing this type of disease. Walking is the most basic exercise of human beings, and the development of a gait analysis system has important scientific significance and application value in the aspects of medical treatment, sports, rehabilitation, humanity, aerospace, industry and the like.
The conventional heart rate measurement equipment generally uses electrocardiogram monitoring, the monitoring method is effective, but is more limited, and continuous heart rate monitoring by adopting an electrocardiogram can cause a certain economic burden to families of a patient, and the defects of electrical safety, electromagnetic interference and the like accompanying the conventional electrical signal heart rate monitoring are overcome, so that a novel sensing technology needs to be searched for solving the problems in the aspect of heart rate monitoring. The traditional respiration monitoring device is less, more people monitor, and has larger uncertainty. Most of traditional gait monitoring equipment uses a pressure platform for monitoring, has large volume and poor portability, and is easy to influence the natural gait of a tested person, so that the result is deviated. The above mentioned monitoring devices are directed to only one specific aspect of respiratory heart rate and gait monitoring, whereas the current society elderly suffer from diseases, mostly due to aging of the body. Therefore, the diseases of the elderly are often not single, and a health monitoring device capable of monitoring various functions of the body is very necessary.
Disclosure of Invention
It is an object of embodiments of the present disclosure to provide a new solution for a sports health monitoring device.
The embodiment of the disclosure provides a sports health monitoring device, which comprises a portable device and at least one sensing optical fiber, wherein the portable device comprises a light emitting module, a light receiving module and an output module;
the light emitting module is used for generating an original light signal with constant intensity;
the sensing optical fiber comprises a first plastic optical fiber, a signal modulation part and a second plastic optical fiber which are connected in sequence; the free end of the first plastic optical fiber is fixed relative to the portable device, and the first plastic optical fiber is used for receiving the original optical signal generated by the optical emission module and transmitting the original optical signal to the signal modulation part; the signal modulation part is a part acting on a monitored part of a monitored object, and is used for sensing a motion signal of the monitored part, modulating the original optical signal through the motion signal and obtaining a modulated optical signal; the second plastic optical fiber is used for transmitting the modulated optical signal, the free end of the second plastic optical fiber is fixed relative to the portable device, and the free end of the second plastic optical fiber is positioned in the action range of the light receiving module;
the light receiving module is used for collecting the modulated light signals to obtain collected data;
the output module is used for outputting the motion information of the monitored part obtained according to the acquired data.
Optionally, the portable device is a mobile phone, the light emitting module is an illumination module of the mobile phone, the light receiving module is a camera module of the mobile phone, and the output module comprises a display module of the mobile phone; the motion health monitoring device further comprises an optical fiber fixing piece matched with the mobile phone, wherein the optical fiber fixing piece is provided with a plug hole corresponding to the free end of the first plastic optical fiber and a plug hole corresponding to the free end of the second plastic optical fiber.
Optionally, the signal modulation part is configured to modulate the original optical signal by changing the intensity of the original optical signal in the process of stretching along with the motion change of the monitored part, so as to obtain a modulated optical signal; wherein, the tensile strength of the signal modulation part has a corresponding relation with the change amount of the light intensity.
Optionally, the signal modulation portion includes the portion of cup jointing, is located first optic fibre core, second optic fibre core and parcel in the portion of cup jointing first optic fibre core with the plastic polymer of second optic fibre core, cup jointing the both ends of portion respectively with first plastic optical fiber and second plastic optical fiber cup joint, first optic fibre core with the optic fibre core of first plastic optical fiber is the integral structure, the second optic fibre core with the optic fibre core of second plastic optical fiber is the integral structure.
Optionally, the sensing optical fiber is formed by a notch which is partially arranged on the plastic optical fiber body and enables an optical fiber core in the plastic optical fiber body to be exposed outwards; the part of the plastic optical fiber body, which is provided with the notch, is the signal modulation part, and the parts of the plastic optical fiber body, which are positioned at two sides of the signal modulation part, are the first plastic optical fiber and the second plastic optical fiber respectively.
Optionally, the portable device further comprises a processor for obtaining movement information of the monitored site from the acquired data.
Optionally, the portable device further includes a communication module, the communication module sends the collected data to a data processing device for data processing, obtains the motion information of the monitored part according to the collected data, and receives the motion information of the monitored part returned by the data processing device through the data processing.
Optionally, the sensing optical fiber further includes a connection portion disposed on the signal modulation portion.
Optionally, the motion health monitoring device comprises at least two sensing optical fibers, wherein the at least two sensing optical fibers comprise at least one first sensing optical fiber acting on the heart part of the monitored object and at least one second sensing optical fiber acting on the foot part of the monitored object; the motion information includes respiratory rate, heartbeat rate and step rate of the monitored subject.
Optionally, the at least one sensing optical fiber comprises at least one second sensing optical fiber acting on the foot of the monitored object, the motion health monitoring device further comprises an insole made of ethylene-vinyl acetate, and a signal modulation part of the second sensing optical fiber is arranged at a set position of the insole.
Optionally, the acquired data is a time sequence image of the free end of the second plastic optical fiber, and the motion information of the monitored part is obtained according to the acquired data, including: for each sensing optical fiber, according to the time sequence image, obtaining a gray value corresponding to the sensing optical fiber in each frame image of the time sequence image; obtaining a time domain signal diagram of the sensing optical fiber according to the gray value corresponding to the sensing optical fiber in each frame of image; and obtaining the motion information of the monitored part corresponding to the sensing optical fiber according to the time domain signal diagram.
The wearable optical fiber type human body movement health monitoring device has the beneficial effects that the breathing heart rate monitoring and the gait monitoring are integrated. The device combines the respiratory heartbeat monitoring and the gait monitoring together, has important value for daily health monitoring including respiratory heart rate of a user and assessing sudden situations such as stroke, parkinsonism and other dyskinesia type diseases and falling, and meets the health monitoring requirements of multiple functions of the body.
Other features of the disclosed embodiments and their advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the embodiments of the disclosure.
FIG. 1 is a schematic diagram of a sports health monitoring device according to one embodiment;
fig. 2 is a schematic diagram of the structure of a signal modulation section according to one embodiment;
FIG. 3 is a schematic diagram of the structural principles of a sports health monitoring device according to one embodiment;
FIG. 4 is a schematic diagram of a connection on a signal modulation section according to one embodiment;
FIG. 5 is a schematic diagram of a smart insole according to one embodiment;
FIG. 6 is a schematic diagram of a sports health monitoring device according to another embodiment;
FIG. 7 is a schematic diagram of acquired data according to one embodiment;
FIG. 8 is a time domain diagram of a respiratory heart rate signal according to one embodiment;
FIG. 9 is a foot time domain signal diagram according to one embodiment;
FIG. 10 is a graph of respiratory temporal signal extraction according to one embodiment;
FIG. 11 is a heart rate time domain signal extraction graph according to one embodiment;
FIG. 12 is a frequency domain plot of respiratory heart rate according to one embodiment;
FIG. 13 is a frequency domain diagram in walking and running gait patterns according to one embodiment.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Life expectancy continues to increase as living conditions improve and medical care advances. Aging of society has led to an increase in health monitoring demands, requiring the establishment of a continuous, dynamic health monitoring system to assess human health. And wherein monitoring of respiratory heart rate and gait is particularly important. Currently, only a specific aspect of respiratory heart rate and gait monitoring is aimed at, and the current diseases of the elderly in society are mostly caused by aging of the body. Therefore, the diseases of the elderly are often not single, and a health monitoring device capable of monitoring various functions of the body is very necessary.
FIG. 1 is a schematic diagram of a sports health monitoring device according to one embodiment.
As shown in fig. 1, the present embodiment provides a sports health monitoring device 100. The athletic health monitoring device 100 includes a portable device 110 and a sensing fiber 120.
The portable device 110 includes a light emitting module, a light receiving module, and an output module.
The portable device is a mobile phone.
The light emitting module is used for generating an original light signal with constant intensity.
The light emitting module is a lighting module of a mobile phone, such as a flashlight of the mobile phone.
The optical receiving module is used for acquiring the modulated optical signals to obtain acquisition data.
The light receiving module is a camera module of the mobile phone, for example, a camera of the mobile phone.
The modulated optical signals comprise refractive optical signals caused by bending deformation of the sensing optical fiber due to periodic movement of a human body along with heartbeat and respiration, and optical signals caused by light leakage of the sensing optical fiber due to pressure change of feet.
The output module is used for outputting the motion information of the monitored part obtained according to the acquired data.
The output module comprises a display module of the mobile phone, such as a display screen of the mobile phone.
The conventional light emitting module is composed of a laser light source or an LED light source with certain requirements as a light source, and the light receiving module is usually composed of a photoelectric signal conversion module (namely a photoelectric detector) to convert the optical signal into an electrical signal. However, the light emitting and receiving module of the present embodiment does not need to be composed of a plurality of modules, but is formed by a mobile phone as the light emitting module and the light receiving module at the same time. The flashlight of the mobile phone is a light-emitting source, and the camera of the mobile phone is used as a receiving module. In this embodiment, because there is no photoelectric signal conversion module, the information in the optical signal does not need to be obtained through conversion of the photoelectric signal, but the optical signal can be directly recorded by using the video recording function of the mobile phone, and the information in the video can be directly obtained through a certain mathematical method.
The integrated light emitting and receiving module has the advantages of reducing the dispersion degree of the module, being convenient for unified management, and the mobile phone can be used as a carrier of a processing program, so that the processing of the video file can be completed by the mobile phone, the process that data needs Bluetooth transmission and special platform processing is omitted, thereby directly obtaining a monitoring result, being more portable and conforming to the concept of wearable equipment.
The method comprises the steps of receiving modulated optical signals through an optical receiving module, recording video images in real time, converting the real-time video images into single-frame images through a data processing device, calculating image gray values to obtain time domain data of a light intensity frequency domain, obtaining the respiration times, the step numbers and the pressure changes of feet through data analysis, processing the time domain data through Fourier transformation segmentation, obtaining the respiration frequency, the heartbeat frequency and the step frequency through a band-pass filter, and monitoring the respiration heart rate and the movement state of a human body.
The sensing optical fiber 120 includes a first plastic optical fiber, a signal modulation part, and a second plastic optical fiber connected in sequence.
The free end of the first plastic optical fiber is fixed relative to the portable device, and the first plastic optical fiber is used for receiving an original optical signal generated by the optical transmitting module and transmitting the original optical signal to the signal modulating part.
The signal modulation part is a part acting on a monitored part of the monitored object, and is used for sensing a motion signal of the monitored part and modulating an original optical signal through the motion signal to obtain a modulated optical signal.
The signal modulation part is arranged to modulate the original optical signal by changing the intensity of the original optical signal in the process of stretching and changing along with the movement and the change of the monitored part, so as to obtain the modulated optical signal.
The tensile strength of the signal modulation part has a corresponding relation with the change amount of the light intensity.
The signal modulation parts in the embodiment are positioned at different parts of the human body, including the heart part and the foot part of the human body.
The signal modulation part positioned at the heart part of the human body leads the sensing optical fiber to be slightly stretched along with the change of vital signs of the human body due to the vibration of the respiration and the heartbeat of the human body in the natural frequency interval, thereby losing the intensity of the optical signal sent by the optical emission module. The signal modulation part at the heart part of the human body can simultaneously sense the motion signals of the respiration and the heart rate of the human body, and has the advantages of small volume, high sensitivity, electromagnetic interference resistance, simultaneous monitoring of the heart rate and the respiration signals and the like compared with an electrical heart sound and respiration sensor. The signal modulation part can be woven into the garment, so that the wearing comfort is improved while the normal monitoring is ensured.
The signal modulation part is positioned on the foot, and the sensing optical fiber is greatly stretched along with the contact between the sole and the ground due to the pressure change of the foot, so that the intensity of the optical signal emitted by the optical emission module is also lost.
Fig. 2 is a schematic diagram of the structure of a signal modulation section according to one embodiment.
As shown in fig. 2, the structures of the signal modulation part may be a plastic polymer composite structure 2-1, a triangular cutting structure 2-2, a vertical cutting structure 2-3, and a circular cutting structure 2-4.
The signal modulation part comprises a sleeving part, a first optical fiber core, a second optical fiber core and a plastic polymer, wherein the first optical fiber core, the second optical fiber core and the plastic polymer wrap the first optical fiber core and the second optical fiber core, the first optical fiber core and the second optical fiber core are positioned in the sleeving part, the two ends of the sleeving part are respectively sleeved with the first plastic optical fiber and the second plastic optical fiber, the first optical fiber core and the optical fiber core of the first plastic optical fiber are of an integral structure, and the second optical fiber core and the optical fiber core of the second plastic optical fiber are of an integral structure. Such as a signal conditioning portion of a plastic composite structure.
In this embodiment, the optical fiber core in the plastic polymer composite structure is used to transmit an optical signal, which is fresnel reflected in the plastic optical fiber. The flexible part of the optical fiber is transparent polymer medium, and has high Young's modulus and large tensile strain. When the human body breathes and beats, the bending deformation of the flexible polymer optical fiber, especially the plastic optical fiber, is increased, the loss of the optical signal in the flexible part of the optical fiber is changed, and the sensing of the human body vital sign signal is realized. Similarly, when a human body walks, the pressure distribution of the foot also changes, so that the bending deformation of the plastic optical fiber at the foot monitoring site is increased, the light loss is increased, and the feedback of the pressure change signal is realized. Specifically, the plastic optical fiber in the plastic polymer composite structure in this embodiment has a diameter of 1mm and a length of 1m; the diameter of the flexible structure is 1mm, and the length is 5mm.
The sensing optical fiber is formed by a notch which is arranged on a part of the plastic optical fiber body and enables an optical fiber core in the plastic optical fiber body to be exposed outwards.
The plastic optical fiber comprises a plastic optical fiber body, wherein a part of the plastic optical fiber body, which is provided with a notch, is a signal modulation part, and parts of the plastic optical fiber body, which are positioned on two sides of the signal modulation part, are respectively a first plastic optical fiber and a second plastic optical fiber. Such as triangular cut structures, vertical cut structures, and circular cut structures.
The existing double-layer deformation type optical fiber sensor and single deformation type optical fiber sensor mainly depend on a grid layer to serve as a deformation structure. However, due to the force, both single-layer and double-layer mesh layers slide, which causes corresponding noise and errors, disturbing the correctness of the signal. While the mesh layer requires a corresponding support structure to maintain alignment with the optical fibers, this practice can add significant cost and complexity to the system. The signal modulation parts proposed in the embodiment are all based on the design of the optical fiber itself, and no additional grid layer and supporting structure are needed. Therefore, the signal modulation part provided by the embodiment can avoid errors caused by sliding of the grid layer and can reduce the cost caused by the grid layer and the supporting structure.
The traditional optical fiber bending loss principle has less optical power loss in the optical fiber in the bending process of the optical fiber, and is difficult to be used for monitoring weak signals such as respiration and heart rate. The method for solving the problem of too small bending loss is mostly based on reducing the core diameter of the optical fiber, but the method can cause the problems of weakening of basic optical signals, inaccurate stress of the optical fiber and the like to a certain extent. The signal modulation part proposed by the present embodiment solves these problems by directly designing the optical fiber structure. The signal modulation part provided by the embodiment increases the optical loss power transmitted in the optical fiber on the premise of not changing the core diameter of the optical fiber, so that the optical loss after the optical fiber is stressed and bent is increased, the response amplitude of the optical power to bending is increased, and weak signals such as respiratory heart rate and the like can be better monitored.
The second plastic optical fiber is used for transmitting the modulated optical signal, the free end of the second plastic optical fiber is fixed relative to the portable device, and the free end of the second plastic optical fiber is positioned in the action range of the light receiving module.
Fig. 3 is a schematic structural diagram of a sports health monitoring device according to an embodiment.
As shown in fig. 3, 3-1 is an optical fiber fixing piece matched with a mobile phone, 3-2 is a camera of the mobile phone, 3-3 is a flashlight of the mobile phone, 3-4 is a signal modulation part positioned at a heart part of a human body, 3-5 is an intelligent insole, 3-6 is a signal modulation part positioned at a phalange of a foot, 3-7 is a signal modulation part positioned at a forefoot of the foot, and 3-8 is a signal modulation part positioned at a hindfoot of the foot.
Further, the sensing optical fiber further comprises a connecting part arranged on the signal modulation part.
The signal modulation part positioned at the heart part of the human body can be connected with the garment body in the modes of sticking buckles, sewing with needle threads and the like, so that the sensing optical fiber is positioned at the heart part, the sensing optical fiber is fixed through the needle threads and a certain tensile force is applied to the band-shaped fabric, the sensing optical fiber is tightly attached to the skin, and a more accurate measurement result is obtained.
Fig. 4 is a schematic diagram of a connection on a signal modulation section according to one embodiment.
As shown in fig. 4, the signal modulation part of the heart of the human body of this embodiment is in a band shape, and includes a suture thread 4-1, a fastening thread 4-2, an outer layer fabric 4-3, a signal modulation part 4-4, and an inner layer fabric 4-5.
The athletic health monitoring device 100 includes at least two sensing optical fibers 120.
The at least two sensing optical fibers comprise at least one first sensing optical fiber acting on the heart part of the monitored object and at least one second sensing optical fiber acting on the foot part of the monitored object.
The at least one sensing fiber 120 includes at least one second sensing fiber that acts on the foot of the monitored subject.
The athletic health monitoring device 100 further includes an insole made of ethylene-vinyl acetate, and the signal modulation portion of the second sensing optical fiber is disposed at a set position of the insole.
The part of the sensing optical fiber for gait monitoring can obtain gait information such as step frequency, step number, pressure and the like through monitoring the pressure change of the foot. Conventional gait analysis instruments are pressure measurement plates or platforms, which, although they can accurately reflect the complete foot function and musculoskeletal or biomechanical problems in standing, walking or running, lack portability, which also results in an inability to use the measurement instrument for continuous and long-term gait monitoring. In addition, measurements made with these instruments may cause the user to change their natural gait pattern, for example, the user's gait to change the individual in order to place the foot in the platform. The intelligent insole applied to gait monitoring in the embodiment can be applied to shoes, and ensures portability and a natural gait mode as much as possible.
The electronic sensor insole has the defects of large measurement result error and limited service life of the battery, and the electronic sensor has potential safety hazards, so that the electronic sensor insole is not beneficial to the safety of users. Due to the fact that materials are used, the intelligent insoles are high in manufacturing cost, and are not beneficial to popularization in the society. Compared with the electronic sensor insole, the intelligent insole in the embodiment has the advantages of small size, light weight, electric isolation, electromagnetic field resistance, biocompatibility and the like, and the safety problem of wires and the service life of a battery do not need to be worried about. The intelligent insole in the embodiment can be combined with shoes, so that the wearing comfort and convenience can be improved.
FIG. 5 is a schematic diagram of a smart insole according to one embodiment.
As shown in FIG. 5, 5-1 is a sticking buckle, 5-2 is an inductive optical fiber, 5-3 is an original insole, and 5-4 is a signal modulation part.
The intelligent insole comprises an original insole 5-3 made of ethylene-vinyl acetate, an induction optical fiber 5-2 and an optical fiber section diameter of 1mm. The insole has three sites respectively located on phalanges, forefoot and hindfoot. During walking, the rear foot firstly contacts the ground, then the front foot contacts the ground at the toes, and finally the rear foot and the front foot stop contacting the ground successively, so that the three points can acquire gait information as much as possible. The signal modulation part and the insole locus are fixed by a knitting method and the sticking buckle 5-1. For the accuracy of the result, the area of each signal modulating portion needs to be as small as possible to prevent the occurrence of errors due to strain in the optical fiber structure caused by stress in the non-signal modulating portion. Each signal modulation section 5-4 is therefore only 7.5mm in diameter. The ethylene-vinyl acetate insole is used as a bottom die, the thickness of the half sole is 3mm, and the thickness of the heel is 13mm, so that the lightness and convenience of the insole are ensured.
The intelligent insole in the embodiment mainly comprises an original insole made of ethylene-vinyl acetate material and sensing optical fibers with signal modulation parts, wherein three sensing sites are arranged on the insole, and each site is provided with a corresponding signal modulation part. The signal modulation part will give feedback to the pressure to which the site is subjected.
Fig. 6 is a schematic diagram of a sports health monitoring device according to another embodiment.
As shown in fig. 6, the athletic health monitoring device 100 also includes a fiber optic fixture 130 that is adapted to mate with a cell phone.
The optical fiber fixing piece is provided with a splicing hole corresponding to the free end of the first plastic optical fiber and a splicing hole corresponding to the free end of the second plastic optical fiber.
The optical fiber fixing piece is made of polylactide material and is attached to the mobile phone, so that the light source and the camera can be aligned with the optical fiber position, and adverse effects of external stray light on the monitoring effect are avoided. The optical fiber fixing piece is provided with a groove with the depth of 15mm at the camera 3-2, so that the light source of the mobile phone and the camera can be more favorably distinguished to obtain extremely sensitive light intensity change through light intensity modulation.
Further, the portable device 110 also includes a processor or a communication module.
The processor is used for obtaining the motion information of the monitored part according to the acquired data.
When the processor is arranged in the mobile phone, the data collected by the light receiving module can be directly sent to the processor for processing.
When the mobile phone is not provided with the processor, the communication module of the mobile phone is required to send the acquired data to the data processing device for data processing, the motion information of the monitored part is obtained according to the acquired data, and the motion information of the monitored part returned by the data processing device through data processing is received.
In this embodiment, the data collected by the light receiving module is a video image.
The data processing device is used for converting the video image received by the light transmitting and receiving module into a single frame picture, and analyzing the power spectrum of the time domain data by using an algorithm to acquire the human motion information.
The data processing device can realize independent reading of different signal channels through the region segmentation of the video image. Different light spots in the video image represent monitoring signals at different sites.
The data processing device is used for converting the optical signals received by the optical receiving module into identifiable signals, and obtaining the heartbeat and respiratory frequency of the human body through analyzing the power spectrum. The data processing apparatus of the present embodiment is greatly different from the conventional data processing apparatus. The conventional data processing device processes an electrical signal obtained by passing an optical signal through the photoelectric signal conversion module, so that a specific demodulator is required to read the signal and restore information carried by the optical signal. However, the data processing device of the embodiment directly processes the video image, which is easier to operate, does not need a demodulator for demodulation, and greatly reduces the cost requirement.
FIG. 7 is a schematic diagram of acquired data according to one embodiment.
As shown in fig. 7, the light spots with bright white color are the light spots corresponding to the foot sites, and the light spots with dark white color are the light spots corresponding to the human heart sites.
Because the signal modulation parts of the embodiment are four in total, four light spots exist in the video image, each light spot is an optical signal in one signal modulation part, and each light spot can be divided by the video image through gravity center identification, so that mutually independent optical signal channels are obtained and read.
The motion information includes respiratory rate, heartbeat rate, and step rate of the monitored subject.
In this embodiment, the data collected from the heart part of the human body can change the axial strain of the sensing optical fiber due to the heart rate and respiration, so as to affect the light transmission efficiency and increase the transmission loss generated by the transmitted light, so that the collected data contains heart rate and respiration signals, and the heart rate and respiration can be monitored simultaneously. Because heart rate and breathing signals are in different frequency ranges, separation of heart rate and breathing signals can be achieved by utilizing band-pass filters with different frequency bands.
The acquired data is a time sequence image of the free end of the second plastic optical fiber, and the motion information of the monitored part is obtained according to the acquired data, and the method comprises the following steps of S700-S702:
step S700, for each sensing optical fiber, obtaining the corresponding image gray value of the sensing optical fiber in each frame of image of the time sequence image according to the time sequence image.
The video image recorded by the light receiving module is led into the data processing device by the data transmission line to obtain the gray value of the picture, and the following formula is used for summation:
f is the sum of gray values of a certain frame of image, a and b are the upper limit of the coordinates of the horizontal Pixel point and the vertical Pixel point of the image respectively, and Pixel kt The pixel gray value where the coordinate point is located at (k, t).
Step S701, obtaining a time domain signal diagram of the sensing optical fiber according to the gray value corresponding to the sensing optical fiber in each frame of image.
And arranging each frame of image according to time, recording the sum of gray values of each frame of image, and obtaining each frame of image. The data thus obtained in time is the original optical signal. Because the carrier is a mobile phone, the data processing device can be written into a mobile phone program through code writing, so that the light emitting and receiving module is realized, the data processing device is integrated, and the convenience of the device is improved. Simultaneously, the synchronous monitoring of the respiratory rate and gait information can be realized by utilizing the function of respectively reading the optical signal channels.
And taking the time of each frame of image as an abscissa and the sum of pixel gray values of each frame of image as an ordinate to obtain a time domain signal diagram.
Fig. 8 is a time domain diagram of a respiratory heart rate signal according to one embodiment. As shown in fig. 8, the inclusion of the respiration and heart rate signals in the image requires further processing.
FIG. 9 is a foot time domain signal diagram according to one embodiment. As shown in fig. 9, the number of foot contact with the ground and the pressure change information during walking can be directly observed from the amplitude change in the image. In order to obtain the information of the frequency domain map from the original signal, the signal needs to be further processed.
Step S702, according to the time domain signal diagram, the motion information of the monitored part corresponding to the sensing optical fiber is obtained.
After the time domain signals of the respiratory heart rate and the gait are recorded and stored, the data covering the previous frame is continuously recorded to acquire the data F so as to reduce the algorithm complexity of the program. And obtaining the numerical relation of the light intensity change along with time in the breathing process and the relation of the foot pressure change along with time, namely a light intensity frequency domain.
Then, the direct current component of the data is eliminated, and then the power spectrum is calculated by the obtained time domain data through a periodogram method:
first, 20 seconds of data is segmented using a hamming window:
x i (n)＝x(n+iM-M)，0≤n≤M,1≤i≤L
m represents the data length of the window, n represents the nth data, x i (n) data representing an ith video segment at a sampling frequency of a video playback frame rate, L representing a sum of the number of segments in which the video data is divided。
The calculation is then performed using the following formula:
omega represents the frequency of the signal, w (n) represents the window function, U represents the normalization factor, I i (ω) represents the power spectrum of the i-th segment video data, and j represents a complex number. I.e., fourier transforms, calculate the power spectrum of the i-th segment of video data.
And finally, carrying out superposition average according to the following formula to obtain the power spectrum of the whole data:
P x (e i ω) represents the power spectrum of the entire piece of data.
For the respiratory rate signals, the data are respectively passed through two band-pass filters, and the frequency ranges of respiration and heartbeat are corresponding (under normal conditions, the respiratory frequency of a person in a resting state is 0.2-0.4 Hz, and the heartbeat frequency is 0.7-1.5 Hz). The signal passing through the filter becomes significantly smoother.
Fig. 10 is a respiratory time domain signal extraction diagram according to one embodiment, and fig. 11 is a heart rate time domain signal extraction diagram according to one embodiment. The ordinate of the image represents the relative change in light intensity and the abscissa represents time. As can be seen from fig. 10, with respiration, the transmitted light intensity transmitted by the sensing optical fiber is reduced in one period of the chest fluctuation, the relative change of the light intensity is reduced, then the relative change rate of the light intensity is increased to the original value, and the chest vibration caused by the heartbeat of the human body also causes the transmitted light intensity to be periodically changed, which indicates that the device has good repeatability.
And finally, carrying out power spectrum analysis on the 2 groups of data to find out the exact respiratory frequency and heartbeat frequency. FIG. 12 is a frequency domain plot of respiratory heart rate, respiratory rate of 0.28Hz and heartbeat rate of 1.41Hz, according to one embodiment. The number of breaths per minute and the number of heartbeats can be calculated therefrom.
For gait monitoring signals, only one band-pass filter is needed to pass the data respectively, and the walking frequency range is corresponding (under normal conditions, the motion frequency of walking and running is 0.5-2.0 Hz). As shown in fig. 9, the abscissa of the image also represents the relative change in time and intensity, respectively. It can be seen from fig. 9 that, along with the movement of the human body, the pressure applied to the signal modulation part changes along with the change of the gait phase in one period of gait, when the monitoring site is contacted with the ground, the transmitted light intensity transmitted by the sensing optical fiber decreases, the relative change of the light intensity decreases, and when the site leaves the ground, the light intensity rises to the original value again, and the regularity of the data waveform indicates that the device has good repeatability. And then, fitting the light intensity and the pressure data through a function fitting method to obtain the conversion relation between the pressure and the light intensity, thereby obtaining the pressure information.
Finally, the data in these two gaits are subjected to power spectrum analysis to find out the frequency of the asynchronous mode, and fig. 13 is a frequency domain diagram in walking and running gaits modes, which are respectively 0.61hz and 1.39hz according to one embodiment. From these data, parameters such as step size, number of steps per second, etc. can also be calculated.
The embodiment provides a motion health monitoring device, and the light emission and receiving module that uses adopts the lighting module and the camera module of cell-phone to realize, under the prerequisite of guaranteeing the stability and the intensity of the light signal that send and the definition of received light signal and pixel gray value's difference, compare the light signal generating device that current optical fiber type human vital sign monitoring device used, like laser instrument and light signal receiving device photodiode, photomultiplier etc. have advantage in the cost.
The embodiment provides a motion health monitoring device, and the response optic fibre that uses mainly comprises plastic optical fiber, and the optic fibre has signal modulation portion, and the influence of strain stretching to light loss is more showing than conventional optic fibre, can increase the light transmission loss that human respiratory heartbeat and foot pressure change caused, makes the periodic variation that appears on the light receiving module more easily distinguish. The grid layer is not needed to be used as a deformation structure, and the supporting structure is not needed to keep the optical fiber fixed, so that sliding errors are avoided. While guaranteeing the monitoring efficiency, the material value is low.
The embodiment provides a wearable optical fiber type human body movement health monitoring device which integrates respiratory heart rate monitoring and gait monitoring by taking a mobile phone, clothes and insoles as carriers. The device has the innovation that the mobile phone is used as a carrier, the convenience of the mobile phone is used for combining the respiratory heart rate monitoring and the gait monitoring, and the device has important value for daily health monitoring including respiratory heart rate of a user and evaluation of sudden situations such as movement disorder diseases such as stroke, parkinson and the like, falling and the like, and meets the health monitoring requirements of multiple functions of the body.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.
Claims (10)
1. The motion health monitoring device is characterized by comprising a portable device and at least one sensing optical fiber, wherein the portable device comprises a light emitting module, a light receiving module and an output module;
the light emitting module is used for generating an original light signal with constant intensity;
the sensing optical fiber comprises a first plastic optical fiber, a signal modulation part and a second plastic optical fiber which are connected in sequence; the free end of the first plastic optical fiber is fixed relative to the portable device, and the first plastic optical fiber is used for receiving the original optical signal generated by the optical emission module and transmitting the original optical signal to the signal modulation part; the signal modulation part is a part acting on a monitored part of a monitored object, and is used for sensing a motion signal of the monitored part, modulating the original optical signal through the motion signal and obtaining a modulated optical signal; the second plastic optical fiber is used for transmitting the modulated optical signal, the free end of the second plastic optical fiber is fixed relative to the portable device, and the free end of the second plastic optical fiber is positioned in the action range of the light receiving module;
the light receiving module is used for collecting the modulated light signals to obtain collected data;
the output module is used for outputting the motion information of the monitored part obtained according to the acquired data.
2. The sports health monitoring device according to claim 1, wherein the portable device is a mobile phone, the light emitting module is an illumination module of the mobile phone, the light receiving module is a camera module of the mobile phone, and the output module comprises a display module of the mobile phone; the motion health monitoring device further comprises an optical fiber fixing piece matched with the mobile phone, wherein the optical fiber fixing piece is provided with a plug hole corresponding to the free end of the first plastic optical fiber and a plug hole corresponding to the free end of the second plastic optical fiber.
3. The exercise health monitoring device of claim 1, wherein the signal modulation section is configured to modulate the original optical signal by changing an intensity of the original optical signal during a stretch change according to a movement change of the monitored portion, to obtain a modulated optical signal; wherein, the tensile strength of the signal modulation part has a corresponding relation with the change amount of the light intensity.
4. The exercise health monitoring device of claim 3, wherein the signal modulation section comprises a sleeve joint section, a first optical fiber core, a second optical fiber core and a plastic polymer wrapping the first optical fiber core and the second optical fiber core, wherein the sleeve joint section is provided with two ends respectively sleeved with the first plastic optical fiber and the second plastic optical fiber, the first optical fiber core and the optical fiber core of the first plastic optical fiber are in an integral structure, and the second optical fiber core and the optical fiber core of the second plastic optical fiber are in an integral structure.
5. The exercise health monitoring device of claim 3, wherein the sensing optical fiber is formed by a notch provided in a part of the plastic optical fiber body such that an optical fiber core in the plastic optical fiber body is exposed outward; the part of the plastic optical fiber body, which is provided with the notch, is the signal modulation part, and the parts of the plastic optical fiber body, which are positioned at two sides of the signal modulation part, are the first plastic optical fiber and the second plastic optical fiber respectively.
6. The athletic health monitoring device of claim 1, further comprising a processor for deriving movement information of the monitored site from the acquired data; or alternatively, the process may be performed,
the portable device further comprises a communication module, the communication module sends the acquired data to a data processing device for data processing, the motion information of the monitored part is obtained according to the acquired data, and the motion information of the monitored part returned by the data processing device through the data processing is received.
7. The athletic health monitoring device of any of claims 1-6, wherein the sensing fiber further comprises a connection disposed on the signal modulation portion.
8. The athletic health monitoring device of any one of claims 1-6, comprising at least two of the sensing optical fibers including at least one first sensing optical fiber acting on a heart site of the monitored subject and at least one second sensing optical fiber acting on a foot of the monitored subject; the motion information includes respiratory rate, heartbeat rate and step rate of the monitored subject.
9. The athletic health monitoring device of any one of claims 1 to 6, wherein the at least one sensing fiber comprises at least one second sensing fiber acting on the foot of the monitored subject, the athletic health monitoring device further comprising an insole of ethylene vinyl acetate material, the signal modulation portion of the second sensing fiber being disposed at a set location on the insole.
10. The exercise health monitoring device of any one of claims 1 to 6, wherein the acquired data is a time-series image of a free end of the second plastic optical fiber, and wherein obtaining exercise information of the monitored site from the acquired data comprises: for each sensing optical fiber, according to the time sequence image, obtaining a gray value corresponding to the sensing optical fiber in each frame image of the time sequence image; obtaining a time domain signal diagram of the sensing optical fiber according to the gray value corresponding to the sensing optical fiber in each frame of image; and obtaining the motion information of the monitored part corresponding to the sensing optical fiber according to the time domain signal diagram.
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