CN117582592A - Multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fiber - Google Patents
Multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fiber Download PDFInfo
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- CN117582592A CN117582592A CN202311551150.7A CN202311551150A CN117582592A CN 117582592 A CN117582592 A CN 117582592A CN 202311551150 A CN202311551150 A CN 202311551150A CN 117582592 A CN117582592 A CN 117582592A
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- 239000000463 material Substances 0.000 claims description 25
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- 229920001971 elastomer Polymers 0.000 claims description 6
- -1 methyl hydroxyl Chemical group 0.000 claims description 6
- 229920001721 polyimide Polymers 0.000 claims description 6
- 229920002545 silicone oil Polymers 0.000 claims description 6
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- 239000011247 coating layer Substances 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
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- 238000004806 packaging method and process Methods 0.000 claims description 3
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- 229920002635 polyurethane Polymers 0.000 claims description 3
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- 238000000034 method Methods 0.000 abstract description 9
- 206010002091 Anaesthesia Diseases 0.000 abstract description 2
- 230000037005 anaesthesia Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000241 respiratory effect Effects 0.000 description 4
- 210000003437 trachea Anatomy 0.000 description 4
- 238000002627 tracheal intubation Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/04—Tracheal tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
Abstract
The invention provides a multi-parameter sensing intelligent plug-in breathing tube based on a multi-core optical fiber. The method is characterized in that: the device consists of a demodulator, a multi-core optical fiber fan-in fan-out device, a multi-core optical fiber and an inserted breathing tube. The multi-core optical fiber comprises a temperature monitoring module, a three-dimensional shape reduction and pressure monitoring module and a humidity monitoring module. The invention can be widely used in biomedical scenes such as first aid, resuscitation and open airway in clinical anesthesia, and belongs to the technical field of biomedical.
Description
Field of the art
The invention relates to a multi-parameter sensing intelligent plug-in breathing tube based on a multi-core optical fiber, which can be widely used in biomedical scenes such as opening of an airway in emergency treatment, resuscitation and clinical anesthesia, can also be used for training a cannula by a practicing doctor, and belongs to the technical field of biomedical.
(II) background art
An inserted respiratory tube is a medical device that provides support and assistance when a patient needs to breathe or perform an endotracheal intubation procedure, often used with laryngoscopes and ventilators. It is one of the techniques widely used in artificial airway management. The traditional inserted respiratory tube is made of high polymer materials, and the head is provided with an air bag which can play a role in sealing and fixing after being inflated. The inserted breathing tube is an important medical technology, provides reliable ventilation support and respiratory therapy selection, is vital to life support and rehabilitation of patients, and can save the lives of the patients when the patients needing rescue are met and matched with an upper respirator and other medical equipment. However, the use of an inserted breathing tube requires the medical staff to have the relevant technical knowledge and operating skills to ensure that the breathing tube balloon can be inflated to the proper size after ventilation during the intubation process, and the balloon is in contact with the tracheal wall at the proper pressure, and at the same time, the inserted breathing tube also needs to be checked and replaced regularly, if the replacement process is not operated properly, the risk of secondary injury and other complications to the patient is increased, and in addition, the conventional inserted breathing tube has the defects of single use and huge expenditure with various life monitoring devices.
Based on the defect that traditional plug-in breathing tube exists, multiple plug-in breathing tube with sensing function appears, like patent CN210644792U, there is a pressure sensor in this plug-in breathing tube gasbag, can monitor the gasbag pressure size in the gasbag after the gasbag ventilates inflation, but its electronic sensor that uses through wire connection receives other electronic equipment's interference easily, leads to signal quality to descend, and secondly electronic sensor's biocompatibility is low, and this plug-in breathing tube's use is the gas pressure size in the monitoring gasbag only, monitoring function is comparatively single. In contrast, the invention has various monitoring functions, can effectively monitor the temperature and humidity in the trachea of a patient, the contact pressure of the air bag and the air bag wall and the three-dimensional shape change of the air bag, and has high biocompatibility and strong anti-interference capability.
(III) summary of the invention
The invention aims to provide a multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fibers. The breathing tube can monitor the temperature and humidity in the trachea of a human body in real time and the contact pressure between the air bag and the tracheal wall after the breathing tube is inflated. Meanwhile, the three-dimensional shape change of the expansion of the air bag after the breathing tube is inserted into the trachea can be monitored, and whether the breathing tube is shifted in the use process can be monitored through monitoring the three-dimensional shape of the air bag, and the breathing tube can be used for training a cannula by a training doctor.
The purpose of the invention is realized in the following way:
a multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fibers is provided. The method is characterized in that: the multi-core fiber fan-in fan-out device comprises a demodulation instrument, a multi-core fiber fan-in fan-out device, a multi-core fiber and an inserted breathing tube, wherein the multi-core fiber comprises a temperature monitoring module, a three-dimensional shape reduction and pressure monitoring module and a humidity monitoring module, the demodulation instrument is connected with the multi-core fiber through the multi-core fiber fan-in fan-out device, the multi-core fiber is packaged in a fiber channel reserved on the wall of the inserted breathing tube through a breathing tube air bag, and the channel always passes through the breathing tube air bag until the tail end of the breathing tube. The multi-core optical fiber is positioned on the tracheal wall and is provided with a temperature monitoring module, the part of the multi-core optical fiber, which is positioned on the breathing tube air sac, is provided with a three-dimensional shape reduction and pressure monitoring module, and the tail end of the multi-core optical fiber is provided with a humidity monitoring module.
The temperature monitoring module is as follows: the coating layer outside the fiber grating for temperature sensing is stripped, the fiber grating is packaged in a capillary glass tube, the capillary tube is slightly longer than the stripping area, the tube is filled with heat sensitive materials, then the two ends of the capillary tube are sealed by ultraviolet curing glue, no bubbles are ensured in the capillary tube, and the heat sensitive materials are one of dimethyl silicone oil and methyl hydroxyl silicone oil.
In the three-dimensional shape reduction and pressure monitoring module, the fiber bragg grating used for monitoring the contact pressure of the air bag and the air bag wall is encapsulated in a polymer, the polymer is fixed on the outer surface of the inner air bag in the double-layer air bag, the polymer is cuboid with equal length and width, and is one of ultraviolet curing glue, epoxy resin, thermoplastic polyurethane elastomer rubber, polyimide and polyurethane methyl siloxane.
In the three-dimensional shape restoration and pressure monitoring module, N fiber gratings which are arrayed are inscribed on multicore fibers on two sides of a pressure sensor packaged by a polymer and serve as three-dimensional shape restoration of a breathing tube air bag.
The humidity monitoring module is a hollow fiber welded at the tail end of a multi-core fiber, and the tail end of the hollow fiber is a humidity-sensitive material film, so that a Fabry-Perot resonant cavity is formed, and the humidity-sensitive material is one of polyvinyl alcohol, polyimide, chitosan and the like.
The inserted breathing tube is a special breathing tube, a channel is arranged in the tube wall and used for packaging the multi-core optical fibers, the air bag part is of a double-layer air bag structure, the multi-core optical fibers are spirally wound on the outer surface of the inner air bag, and the optical fibers pass through the inner channel of the tube wall, pass through the double-layer air bag and then pass through the inner channel of the tube wall to reach the tail end of the inserted breathing tube.
The above is a preparation process of the multi-parameter sensing intelligent plug-in breathing tube based on the multi-core optical fiber, and the following is a principle-related part.
The principle of the multi-core fiber tail end Fabry-Perot resonant cavity is similar to that of a Fabry-Perot interferometer, and the output interference light intensity can be expressed as:
wherein:wherein K is 1 K is the transmission loss of the air resonant cavity 2 For the transmission loss of the moisture sensitive material resonant cavity, R 1 ，R 2 ，R 3 Respectively the reflectivity of the terminal interface of the multi-core optical fiber, the reflectivity of the contact surface of the hollow optical fiber and the moisture-sensitive material, and the reflectivity of the contact surface of the moisture-sensitive material and the outside air, wherein
In the middle ofAnd->For phase shift of light passing through the air cavity and the moisture sensitive material cavity, n air And n s Refractive index L of air medium and moisture sensitive material medium 1 And L 2 Is the length of the air cavity and the length of the moisture sensitive material, lambda is the wavelength of light.
The free spectral range of the interference spectrum can be expressed as:
when the reflected light intensity changes, the relative change in wavelength can be expressed as:
in the formula, RH is humidity, and it can be seen that when the ambient humidity increases, the humidity-sensitive material absorbs water and expands, so that the cavity length increases, the refractive index decreases, and wavelength shift is caused, and therefore, the ambient humidity can be measured.
According to photoelastic theory, the wavelength change caused by axial strain and temperature of the grating is
Wherein: Δλ (delta lambda) B N is the variation of the central wavelength of the grating eff Is the effective refractive index of the grid region, lambda is the period of the grating, epsilon is the applied strain, P i,j The Proke piezoelectric coefficient is photoelastic tensor, v is Poisson's ratio, and alpha is the thermal expansion coefficient of the optical fiber material; delta T is the amount of temperature change.
Because the temperature monitoring fiber grating can eliminate the influence of temperature on the pressure monitoring fiber grating, the influence of the second half part of the formula (5) on the temperature can be eliminated, and different delta lambda can be caused due to different applied strains epsilon B So that the inserted breathing tube can be measured according to the wavelength driftContact pressure of the balloon with the tracheal wall.
The temperature monitoring module has no external strain epsilon, so that the temperature change in the breathing tube can be measured according to the wavelength drift.
The central wavelength of the grating is modulated by external signals to generate offset, and the wavelength change delta lambda is demodulated B Can be measured. The multi-core optical fiber adopted by the invention comprises a self-reference middle core and three side cores for measurement, and because the response trend of the fiber gratings of the four fiber cores to the temperature and the strain along the axial direction of the optical fiber is consistent, in practical application, the influence caused by the environmental temperature and the axial strain of the optical fiber can be eliminated through the subtraction of the sensing signals of the three side cores and the middle core, the sensing precision of the optical fiber shape is improved, and the demodulation step is simplified. When temperature variation is not considered, formula (5) can be simplified as:
here, p=n eff [p 12 -v(P 11 +P 12 )]And/2 is the effective elasto-coefficient of the fiber.
When the optical fiber is bent, the following relationship exists between the axial strain and the curvature of the circular section elastic beam under the condition of not considering the influence of other external environments:
in the above formula, epsilon is the axial surface line strain value born by the fiber bragg grating measuring position, rho is the curvature radius of the grating measuring position, C is the corresponding curvature, D is the distance from the grating to the neutral plane, and the neutral plane is the plane perpendicular to the bending direction on the section of the fiber. Given D, C, the strain of the fiber grating can be determined.
As can be seen from equations (6) and (7), the strain of the grating is offset from the center wavelength of the grating by Δλ B In proportion to delta lambda, so the curvature C is B Proportional to the ratio. Thus, through monitoringMeasuring the offset delta lambda of the center wavelength of the fiber bragg grating B The magnitude of the curve C of the fiber can be obtained.
When the grating array is bent, the distance d between the three fiber cores and the neutral plane can be obtained 1 、d 2 、d 3 ：
d i ＝r sin(θ b -π/2-θ i ) (8)
Substituting equation (8) into equations (7) and (6) yields the relationship between the grating center wavelength shift and the radius of curvature on the fiber core:
in an actual grating bending sensing system, the grating center wavelength shifts Δλ i /λ i Can be obtained from experimental data such that there are only three unknowns ρ, θ in equation (9) b And theta i (here, θ according to the four-core fiber core arrangement) 1 、θ 2 And theta 3 There is a fixed positional relationship), the grating center wavelength shift equation corresponding to the simultaneous three cores yields:
with theta 1 、θ 2 And theta 3 There is a fixed positional relationship:
by combining the grating center wavelength shift equation (9)) and θ corresponding to the three cores 1 、θ 2 And theta 3 The fixed positional relationship (equation (11)) can be used to solve ρ and θ b 、θ 1 、θ 2 And theta 3 . Therefore, the multicore optical fibers are spirally arranged in the interlayer of the breathing tube double-layer air bag according to the form shown in fig. 3, and the rho and theta are subjected to demodulation by a demodulator b 、θ 1 、θ 2 And theta 3 Demodulation of the equal parameters can then be performed by an algorithm to demodulate the three-dimensional shape of the balloon.
Compared with the traditional inserted breathing tube, the invention has the following remarkable advantages:
1) The multi-parameter sensing device has the function of multi-parameter sensing, and on one hand, parameters such as temperature, humidity, contact pressure of the air bag and the tracheal wall and the like in the trachea of a patient after the patient is inserted into the breathing tube can be provided more accurately and intuitively, and real-time monitoring can be carried out. On the other hand, the medical cost of the patient can be saved by replacing some expensive medical instruments.
2) The traditional inserted respiratory tube requires medical staff to have relevant technical knowledge and operation skills when in intubation, and the invention can provide the three-dimensional shape of the air bag and the contact pressure of the air bag and the tracheal wall in real time, thereby being greatly helpful for the training of the usual intubation of a trainee or the use of the clinically inserted respiratory tube.
(IV) description of the drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic diagram of a temperature monitoring module on a multi-core fiber;
FIG. 3 is a schematic view of a structural portion of a breathing tube balloon;
FIG. 4 is a schematic diagram of a three-dimensional shape restoration and pressure monitoring module on a multicore fiber;
FIG. 5 is a schematic diagram of a humidity monitoring module at the tail end of a multi-core fiber;
FIG. 6 is a schematic diagram of a four-core fiber interface
In the figure:
1-a demodulator; 2-multicore fiber fanin fanout; 3-multicore optical fiber; 4-an inserted breathing tube; 5-a temperature monitoring module; 6-a breathing tube balloon portion; 7-a humidity monitoring module;
501-an ultraviolet curing agent; 502-capillary glass tube; 503-a heat sensitive material; 504-temperature monitoring fiber bragg grating;
601-polymer; 602-breathing tube double-layer balloon; 603-pressure monitoring fiber gratings; 604-three-dimensional shape reduction fiber grating array;
701-hollow-core optical fiber; 702-a moisture sensitive material;
(fifth) detailed description of the invention
For the purpose of promoting an understanding of the principles and advantages of the invention, reference will now be made to the drawings in which there will be illustrated, by way of illustration, and not as an actual or complete description, the embodiments of the invention. All other embodiments, based on the described embodiments, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the invention.
The invention discloses a multi-parameter sensing intelligent plug-in breathing tube based on a multi-core optical fiber, which is shown in figure 1 and comprises a demodulator 1, a multi-core optical fiber fan-in fan-out device 2, a multi-core optical fiber 3 and a plug-in breathing tube 4. The optical fiber used in this embodiment is a four-core optical fiber, the middle core is located at the center of the cladding, and the three side cores are distributed in a regular triangle shape, and the cross section of the optical fiber is shown in fig. 6.
The gratings on the multi-core optical fiber are all prepared by femtosecond point-by-point writing.
First, a three-dimensional shape restoration fiber grating array 604 required for three-dimensional shape restoration of the inserted breathing tube air bag is written on the multi-core optical fiber 3 in advance by using a femtosecond point-by-point method, a temperature monitoring fiber grating 504 required by a temperature monitoring module and a pressure monitoring fiber grating 603 for monitoring the contact pressure of the air bag and the air bag wall are written, wherein the temperature monitoring fiber grating 504 is required to be a certain distance from the three-dimensional shape restoration fiber grating array 604 so as to be packaged in a pipe wall channel of the inserted breathing tube 4, and the three-dimensional shape restoration fiber grating 604 and the pressure monitoring fiber grating 603 are arranged as shown in a structural schematic diagram 4 of the three-dimensional shape restoration and pressure monitoring module on the multi-core optical fiber.
The structure of the temperature monitoring module on the multi-core optical fiber is shown in fig. 2, and the preparation process is as follows: firstly, stripping a coating layer outside a temperature monitoring fiber grating 504, sleeving the temperature monitoring fiber grating into a section of capillary glass tube 502 with the inner diameter slightly larger than that of a multicore fiber, then immersing one end of the capillary tube into a thermosensitive material 503, sucking the thermosensitive material 503 into the capillary glass tube 502 due to the existence of capillary effect, and packaging two sides of the glass tube by ultraviolet curing glue 501 after the capillary glass tube 502 is filled with the thermosensitive material 503, wherein no bubbles exist in the glass tube, and the thermosensitive material 503 is one of dimethyl silicone oil and methyl hydroxyl silicone oil
The structure of the three-dimensional shape reduction and pressure monitoring module on the multicore fiber is shown in fig. 4, a groove-shaped mold of the polymer 601 is needed to be prepared in advance, the size of the polymer 601 is 4mm multiplied by 1mm, the groove-shaped grinding tool is provided with a square groove with the size, the pressure monitoring fiber grating 603 on the multicore fiber is placed in the groove-shaped mold, then ultraviolet curing glue is poured into the groove-shaped mold, the glue is irradiated by an ultraviolet lamp, the mold is required to be slightly dithered to enable the glue to have no bubble in the middle until the glue is completely solidified, and the ultraviolet curing glue can be replaced by one of epoxy resin, thermoplastic polyurethane elastomer rubber, polyimide and polyurethane methyl siloxane.
The structure of the humidity monitoring module at the tail end of the multi-core optical fiber is shown in fig. 5, and the preparation process is as follows: firstly, the tail end of the multi-core optical fiber 3 is ground down by a grinder, a section of hollow optical fiber 701 is welded at the tail end of the multi-core optical fiber 3 by an optical fiber welding machine, meanwhile, a solution of a humidity sensitive material 702 is prepared, the welded hollow optical fiber 701 is slightly immersed into the solution, then taken out at a constant speed, and then the hollow optical fiber 701 is put into a high-temperature drying box until the humidity sensitive material 702 at the tail end of the hollow optical fiber 701 forms a film, wherein the humidity sensitive material is one of polyvinyl alcohol, polyimide, chitosan and the like.
Finally, the prepared multicore fiber 3 is packaged into the inserted breathing tube 4, wherein the pressure monitoring module with the polymer 601 is fixed in the middle of the interlayer of the breathing tube double-layer airbag 602 by ultraviolet curing glue, the fixed point is the point on the outer surface of the inner airbag, where the airbag contacts with the tracheal wall, and finally the multicore fiber is packaged as shown in fig. 1 and 3.
The foregoing is illustrative of the present invention and its implementation and principles, and is not limited to the embodiments shown in the drawings, but is to be construed as merely illustrative of the present invention and not limitative of the actual structures and methods. Therefore, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical scheme are not creatively designed without departing from the gist of the present invention, and all the structural manners and the embodiments belong to the protection scope of the present invention.
Claims (6)
1. Multi-parameter sensing intelligent plug-in type breathing tube based on multicore optic fibre, characterized by: the multi-core optical fiber fan-in fan-out device comprises a demodulation instrument, a multi-core optical fiber and an inserted breathing tube, wherein the multi-core optical fiber comprises a temperature monitoring module, a three-dimensional shape restoration and pressure monitoring module and a humidity monitoring module, the demodulation instrument is connected with the multi-core optical fiber through the multi-core optical fiber fan-in fan-out device, the multi-core optical fiber is packaged in a fiber channel reserved on the wall of the inserted breathing tube, the optical fiber is always packaged to the tail end of the breathing tube through a breathing tube air bag, the multi-core optical fiber is positioned on the wall of the breathing tube and provided with the temperature monitoring module, the part of the multi-core optical fiber, which is positioned on the air bag of the breathing tube, is the three-dimensional shape restoration and pressure monitoring module, and the tail end of the multi-core optical fiber is the humidity monitoring module.
2. The multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fibers as claimed in claim 1, wherein: the temperature monitoring module is as follows: the coating layer outside the fiber grating for temperature sensing is stripped, the fiber grating is packaged in a capillary glass tube, the capillary tube is slightly longer than the stripping area, the tube is filled with heat sensitive materials, then the two ends of the capillary tube are sealed by ultraviolet curing glue, no bubbles are ensured in the capillary tube, and the heat sensitive materials are one of dimethyl silicone oil and methyl hydroxyl silicone oil.
3. The multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fibers as claimed in claim 1, wherein: in the three-dimensional shape reduction and pressure monitoring module, the fiber bragg grating used for monitoring the contact pressure of the air bag and the air bag wall is encapsulated in a polymer, the polymer is fixed on the outer surface of an inner air bag in the double-layer air bag, the polymer is cuboid with equal length and width, and is one of ultraviolet curing glue, epoxy resin, thermoplastic polyurethane elastomer rubber, polyimide and polyurethane methyl siloxane.
4. The multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fibers as claimed in claim 1, wherein: in the three-dimensional shape restoration and pressure monitoring module, N fiber gratings which are arranged in an array mode are inscribed on multicore fibers on two sides of a pressure sensor packaged by a polymer and are used for three-dimensional shape restoration of a breathing tube air bag.
5. The multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fibers as claimed in claim 1, wherein: the humidity monitoring module is a hollow fiber welded at the tail end of a multi-core fiber, and the tail end of the hollow fiber is a humidity-sensitive material film, so that a Fabry-Perot resonant cavity is formed, and the humidity-sensitive material is one of polyvinyl alcohol, polyimide, chitosan and the like.
6. The multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fibers as claimed in claim 1, wherein: the inserted breathing tube is a special breathing tube, a channel is arranged in the tube wall and used for packaging the multi-core optical fibers, the air bag part is of a double-layer air bag structure, the multi-core optical fibers are spirally wound on the outer surface of the inner air bag, and the optical fibers pass through the inner channel of the tube wall, pass through the double-layer air bag and then pass through the inner channel of the tube wall to reach the tail end of the inserted breathing tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311551150.7A CN117582592A (en) | 2023-11-20 | 2023-11-20 | Multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311551150.7A CN117582592A (en) | 2023-11-20 | 2023-11-20 | Multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fiber |
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| CN117582592A true CN117582592A (en) | 2024-02-23 |
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| CN202311551150.7A Pending CN117582592A (en) | 2023-11-20 | 2023-11-20 | Multi-parameter sensing intelligent plug-in breathing tube based on multi-core optical fiber |
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| CN (1) | CN117582592A (en) |
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2023
- 2023-11-20 CN CN202311551150.7A patent/CN117582592A/en active Pending
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