CN219782525U - Vital sign optical fiber sensing unit, sensor and intelligent sensing device - Google Patents
Vital sign optical fiber sensing unit, sensor and intelligent sensing device Download PDFInfo
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- CN219782525U CN219782525U CN202221906130.8U CN202221906130U CN219782525U CN 219782525 U CN219782525 U CN 219782525U CN 202221906130 U CN202221906130 U CN 202221906130U CN 219782525 U CN219782525 U CN 219782525U
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- sensing optical
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Abstract
The utility model discloses a vital sign optical fiber sensing unit, wherein a first sensing optical fiber is transversely arranged to form a first sensing layer, a second sensing optical fiber is arranged to form a second sensing layer, the first sensing layer and the second sensing layer are stacked, and the first sensing optical fiber and the second sensing optical fiber are arranged in a crossing manner; due to microscopic or macroscopic motions caused by body heartbeat, respiration, physical activity and the like, pressure is applied to the optical fiber sensing layers which are arranged in a double-layer crossed manner, and the upper sensing section and the lower sensing section are relatively pressed, so that the refractive index of the optical fiber is changed, and the strength and the sensitivity of a detection signal are greatly improved. The utility model further provides an optical fiber vital sign sensor based on the vital sign optical fiber sensing unit and an intelligent sensing device based on the optical fiber vital sign sensor.
Description
Technical Field
The utility model relates to the technical field of optical fibers, in particular to a vital sign optical fiber sensing unit, a sensor and an intelligent sensing device.
Background
With the development of the medical health industry, daily monitoring of vital signs is increasingly concerned, especially for people with high risk of heart diseases and apoplexy, and the early detection and timely rescue can bring great vitality to patients. The existing vital sign monitor usually adopts a single signal to detect a single index, and has certain requirements on the body posture during monitoring, so that the stability and the sensitivity of the device are greatly limited. The optical fiber sensor which is paid attention to at present generally utilizes the refractive index pressure sensitivity of the optical fiber, and has the advantages of high sensitivity, good chemical stability, portability, integration in household products for daily use and the like. However, when a typical optical fiber sensor is used for vital sign monitoring, environmental noise is large, and optical signal phase change is easily caused, so that signal fading and inaccuracy are caused to cause unreliability of a monitoring result. Therefore, reducing the influence of external noise and improving the stability, reliability and sensitivity of the optical fiber sensor are problems to be solved in vital sign monitoring.
Disclosure of Invention
In order to solve the technical problems in the background art, the utility model provides a vital sign optical fiber sensing unit, a sensor and an intelligent sensing device.
The utility model provides a vital sign optical fiber sensing unit, which comprises: a first sensing optical fiber and a second sensing optical fiber;
the first sensing optical fibers are transversely arranged to form a first sensing layer, the second sensing optical fibers are longitudinally arranged to form a second sensing layer, the first sensing layer and the second sensing layer are stacked, and the first sensing optical fibers and the second sensing optical fibers are arranged in a crossing mode to form a sensing network.
Preferably, the first sensing optical fiber and the second sensing optical fiber are sequentially connected and integrally formed.
In the vital sign optical fiber sensing unit, a first sensing optical fiber is transversely arranged to form a first sensing layer, a second sensing optical fiber is longitudinally arranged to form a second sensing layer, the first sensing layer and the second sensing layer are stacked, and the first sensing optical fiber and the second sensing optical fiber are crossed to form a sensing network; the refractive index of the optical fiber is changed after the optical fiber is pressed, and the optical fiber sensing layers which are arranged in a double-layer crossed manner are applied with pressure due to microscopic or macroscopic motions caused by body heartbeat, respiration, physical activity and the like, so that the upper sensing optical fiber and the lower sensing optical fiber are relatively pressed, and the strength and the sensitivity of a detection signal are greatly improved.
The utility model also provides a vital sign optical fiber sensor, which comprises at least one optical fiber sensing unit.
Preferably, the device further comprises a light source unit and a receiving unit;
the light incident end of the optical fiber sensing unit is connected with the output end of the light source unit, and the light emergent end of the optical fiber sensing unit is connected with the receiving unit.
Preferably, the receiving unit includes a first receiver and a second receiver, the light emitting end of the first sensing optical fiber is connected to the first receiver, and the light emitting end of the second sensing optical fiber is connected to the second receiver.
Preferably, the optical fiber sensor comprises a plurality of optical fiber sensing units which are sequentially connected in series.
In the present utility model, the technical effects of the proposed vital sign optical fiber sensor are similar to those of the above-mentioned vital sign optical fiber sensing unit, and therefore, the description thereof is omitted.
The utility model also provides an intelligent sensing device which comprises a base pad and the vital sign optical fiber sensor.
Preferably, the base pad is provided with a first accommodating groove and a second accommodating groove which are arranged in a crossing manner, and the first sensing optical fiber and the second sensing optical fiber are respectively positioned in the first accommodating groove and the second accommodating groove and are arranged in a lamination manner.
Preferably, the first accommodating groove and the second accommodating groove extend along the S-shaped direction, and are arranged on the base pad in a crossing manner to form a grid structure.
Preferably, the first sensing optical fiber is located above the second sensing optical fiber, the bottom of the first accommodating groove is higher than the bottom of the second accommodating groove, and an interlaced step matched with the first sensing optical fiber and the second sensing optical fiber is formed at the intersection of the first accommodating groove and the second accommodating groove;
preferably, the second sensing fiber is connected to the base pad at the staggered steps.
Preferably, the device further comprises a cover pad, wherein the cover pad covers the base pad;
preferably, the bottom of the cover pad is provided with a first pressing strip and a second pressing strip which respectively correspond to the first sensing optical fiber and the second sensing optical fiber;
more preferably, the first bead and/or the second bead are made of a silicone material.
Preferably, the cover mat and/or the base mat are made of a fiberglass material.
According to the intelligent sensing device, the vital sign optical fiber sensor is utilized, so that when a human body presses a pad body, comfort is guaranteed, and meanwhile, vital signs are sensitively and accurately detected through detection signals formed by pressing the sensing optical fibers.
Drawings
Fig. 1 is a schematic structural diagram of an arrangement of a vital sign optical fiber sensing unit according to the present utility model.
Fig. 2 is a schematic structural diagram of another arrangement of a vital sign optical fiber sensing unit according to the present utility model.
Fig. 3 is a schematic structural diagram of a connection mode of a vital sign optical fiber sensor according to the present utility model.
Fig. 4 is a schematic structural diagram of a base pad of an intelligent sensing device according to the present utility model.
Fig. 5 is a schematic structural diagram of a cover pad of an intelligent sensing device according to the present utility model.
Fig. 6 is a schematic view of a partial structure of a molding of an intelligent sensing device according to the present utility model mated with a receiving groove.
Detailed Description
As shown in fig. 1 to 6, fig. 1 is a schematic structural view of an arrangement of a vital sign optical fiber sensing unit according to the present utility model, fig. 2 is a schematic structural view of another arrangement of a vital sign optical fiber sensing unit according to the present utility model, fig. 3 is a schematic structural view of a connection mode of a vital sign optical fiber sensor according to the present utility model, fig. 4 is a schematic structural view of a base pad of an intelligent sensing device according to the present utility model, fig. 5 is a schematic structural view of a cover pad of an intelligent sensing device according to the present utility model, and fig. 6 is a schematic partial structural view of a bead and a receiving groove of an intelligent sensing device according to the present utility model.
Referring to fig. 1, a vital sign optical fiber sensing unit according to the present utility model includes: a first sensing optical fiber 1 and a second sensing optical fiber 2;
the first sensing optical fibers 1 are transversely arranged to form a first sensing layer, the second sensing optical fibers 2 are longitudinally arranged to form a second sensing layer, the first sensing layer and the second sensing layer are arranged in a stacked mode, and the first sensing optical fibers 1 and the second sensing optical fibers 2 are arranged in a crossing mode to form a sensing network.
The present embodiment also proposes a vital sign optical fiber sensor, comprising at least one optical fiber sensing unit as described above with reference to fig. 3; further, the vital sign optical fiber sensor further comprises a light source unit 3 and a receiving unit 4;
the light incident end of the optical fiber sensing unit is connected with the output end of the light source unit 3, and the light emergent end of the optical fiber sensing unit is connected with the receiving unit 4.
In the embodiment, the vital sign optical fiber sensing unit and the optical fiber sensor are provided, the first sensing optical fibers are transversely arranged to form a first sensing layer, the second sensing optical fibers are arranged to form a second sensing layer, the first sensing layer and the second sensing layer are stacked, and the first sensing optical fibers and the second sensing optical fibers are arranged in a crossing manner; the refractive index of the optical fiber is changed after the optical fiber is pressed, and the optical fiber sensing layers which are arranged in a double-layer crossed manner are applied with pressure due to microscopic or macroscopic motions caused by body heartbeat, respiration, physical activity and the like, so that the upper sensing optical fiber and the lower sensing optical fiber are relatively pressed, and the strength and the sensitivity of a detection signal are greatly improved.
In a specific embodiment of the vital signs optical fiber sensing unit, the first sensing optical fiber 1 and the second sensing optical fiber 2 may employ two sensing optical fibers which are respectively arranged; accordingly, in the vital sign fiber optic sensor arrangement, the receiving unit 4 comprises a first receiver 41 and a second receiver 42, the light exit end of the first sensing fiber 1 is connected to the first receiver 41 and the light exit end of the second sensing fiber 2 is connected to the second receiver 42.
During specific detection, the light signals emitted by the light source unit respectively pass through the first sensing optical fiber and the second sensing optical fiber, and then are respectively received by the first receiver and the second receiver; when a human body is in contact with one side of the optical fiber sensing unit, pressure is applied to one side of the optical fiber sensing unit due to microscopic or macroscopic motion caused by heartbeat, respiration, physical activity and the like, so that the crossing position of the first sensing optical fiber and the second sensing optical fiber is relatively pressed, the refractive index of the corresponding position of the first sensing optical fiber and the second sensing optical fiber is changed, the optical signals received by the two receivers are changed, and the sensitive and accurate monitoring of vital signs is realized through superposition processing of the two optical signals.
Referring to fig. 2, in another embodiment of the vital sign optical fiber sensing unit, a first sensing optical fiber 1 and a second sensing optical fiber 2 are sequentially connected and integrally formed; in a specific arrangement, the first sensing layer and the second sensing layer can be sequentially routed through sequentially bending and stacking the whole optical fibers.
Correspondingly, one end, far away from the second sensing optical fiber, of the first sensing optical fiber is connected with the output end of the light source unit, and one end, far away from the first sensing optical fiber, of the second sensing optical fiber is connected with the receiving unit.
During detection, an optical signal emitted by the light source unit sequentially passes through the first sensing optical fiber and the second sensing optical fiber to enter the receiving unit, and when the first sensing layer and the second sensing layer are pressed from one side of the optical fiber sensing unit, the first sensing optical fiber and the second sensing optical fiber are arranged in a crossing mode, so that the crossing position of the first sensing optical fiber and the second sensing optical fiber is pressed at the same time, the detection signal intensity is greatly enhanced, and the influence of noise on a detection result is reduced.
In the practical design of the optical fiber sensor, the optical fiber sensor further comprises a photoelectric transmitting tube current control module, a photoelectric receiving tube signal amplifying module, a data acquisition module, a data processing module and a data wireless transmitting module. The current of the photoelectric emitting tube current control module is 1mA-60mA, the gain resistance of the photoelectric receiving tube signal amplification module is 50Ω -2KΩ, the frequency of the data acquisition module is 128Hz, the light source unit adopts the photoelectric emitting tube, the center wavelength is 1200-1600nm, the 3dB bandwidth is less than 5nm, the power is 0.1mW-10mW and is adjustable, the receiving unit adopts the photoelectric receiving tube, the response wavelength is 1260nm-1610nm, and the response sensitivity is more than 0.5 mu A/mu W at 1310 nm.
In the specific design mode of the optical fiber sensor, the optical fiber sensor can comprise a plurality of optical fiber sensing units which are sequentially connected in series, so that the optical fiber sensor is designed according to monitoring areas required by various use scenes, crosstalk among various sensing areas can be reduced, optical power fluctuation caused by optical fiber sensing device hardware is reduced, and stability and consistency of the optical fiber sensing device are improved.
The vital sign optical fiber sensor of the embodiment can be applied to the fields of mattresses, seat cushions, back cushions, portable wearing sensors and the like in specific application, and is used for carrying out real-time sensitive detection on vital signs of a human body.
Referring to fig. 4 and 5, in order to describe the specific application manner of the vital sign optical fiber sensor of the present embodiment in detail, the present embodiment further proposes an intelligent sensing device, which includes a base pad 5 and the vital sign optical fiber sensor described above;
in the specific embodiment of the base pad, a first accommodating groove and a second accommodating groove which are arranged in a crossing manner are arranged on the base pad 5, and the first sensing optical fiber 1 and the second sensing optical fiber 2 are respectively positioned in the first accommodating groove and the second accommodating groove and are arranged in a stacking manner.
In a specific design mode, the first accommodating groove and the second accommodating groove extend along the S-shaped direction, the first accommodating groove and the second accommodating groove are arranged on the base pad 5 in a crossing manner to form a grid structure, when the first accommodating groove and the second accommodating groove are arranged, the second sensing optical fibers are sequentially arranged in the second accommodating groove along the S-shaped direction, then the first sensing optical fibers are sequentially arranged in the first accommodating groove above the second sensing optical fibers along the S-shaped direction, the cross points between the first sensing optical fibers and the second sensing optical fibers are distributed in a net shape, and the monitoring of a human body on the surface of the whole base pad is realized.
In a specific wiring mode of the bottom pad, bare wire areas of optical fibers are distributed in groove patterns on the upper surface of the bottom pad, the opening surfaces of linear grooves are sealed by adhesive tapes, the opening surfaces of square grooves are exposed, optical fibers are crossed in the square grooves, the crossing points are positioned in the geometric center of the square grooves, and each basic unit is internally provided with a net-shaped square formed by the crossing of the optical fibers.
Referring to fig. 6, in a specific arrangement mode of the first sensing optical fiber and the second sensing optical fiber, the first sensing optical fiber 1 is located above the second sensing optical fiber 2, the bottom of the first accommodating groove is higher than the bottom of the second accommodating groove, and an interlaced step matched with the first sensing optical fiber 1 and the second sensing optical fiber 2 is formed at the intersection of the first accommodating groove and the second accommodating groove; through the difference in height of first holding tank and second holding tank, support first sensing optic fibre and second sensing optic fibre when exerting pressure, prevent that first sensing optic fibre and second sensing optic fibre from crossing the position and being pressed excessively and causing the damage.
In order to ensure that the crossing position is not prone to drift, the second sensing fiber 2 is connected to the bottom pad 5 at said staggered steps.
In other specific designs of the intelligent sensing device, the intelligent sensing device further comprises a cover pad 6, wherein the cover pad 6 is covered above the base pad 5;
in order to improve the detection sensitivity of the sensing optical fibers during pressure application, a first pressing strip 7 and a second pressing strip 8 which respectively correspond to the first sensing optical fiber 1 and the second sensing optical fiber 2 are arranged at the bottom of the cover pad 6, and the first pressing strip is abutted against the first sensing optical fiber and the second pressing strip is abutted against the second sensing optical fiber; preferably, the first bead 7 and/or the second bead 8 are made of a silicone material.
When the optical fiber sensor is pressed, the cover pad is deformed downwards, the adhesive tape crossing part on the lower surface of the cover pad applies pressure to the optical fiber crossing point to cause the change of optical power in the optical fiber, and as vital sign signals, heart rate and breath are periodic line signals, the original signals monitored by the optical fiber sensor can be analyzed and extracted by detecting the optical power signals; when pressure signals (including noise signals) with various different frequencies act on the optical fiber sensor at the same time, the respective frequencies or periods of the different pressure signals can be extracted through conventional Fourier transformation and period statistical algorithms, so that data such as heart rate and respiration are obtained.
In an actual use mode, the optical fiber sensor is arranged below the chest of a person lying on the back or on the side (in close contact), and the breathing and heartbeat frequency of the person can be extracted in real time through a corresponding algorithm; if mattresses such as palm, silica gel, simmons and the like are added between the supine or lateral person and the optical fiber sensor, the respective limit thickness exists, and the breathing and heartbeat frequency of the person can be extracted in real time through a corresponding algorithm within the limit thickness of the corresponding mattress.
In a specific choice of materials, the cover mat 6 is also included, and the cover mat 6 and/or the base mat 5 are made of glass fiber materials.
In other specific design modes, edge sealing strips are adhered to the periphery of the upper surface of the base pad, the edge sealing strips are made of silica gel, the width is 15mm, the thickness is 1.5mm, the outer sides of the edge sealing strips are aligned with the outer sides of the base pad, and the edge sealing strips are positioned between the lower surface of the cover pad and the upper surface of the base pad after the cover pad is attached to the base pad.
In practical products, the intelligent sensing device of the embodiment can be used as an intelligent unit, can be integrated into the existing mattresses, cushions and back cushions, can also use clothes such as waistcoats and jackets as carriers, and can realize vital sign monitoring by wearing the clothes on a human body.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (12)
1. A vital signs fiber optic sensing unit comprising: a first sensing optical fiber (1) and a second sensing optical fiber (2);
the first sensing optical fibers (1) are transversely arranged to form a first sensing layer, the second sensing optical fibers (2) are longitudinally arranged to form a second sensing layer, the first sensing layer and the second sensing layer are arranged in a stacked mode, and the first sensing optical fibers (1) and the second sensing optical fibers (2) are arranged in a crossed mode to form a sensing network.
2. The vital sign optical fiber sensing unit according to claim 1, characterized in that the first sensing optical fiber (1) and the second sensing optical fiber (2) are connected in sequence and integrally formed.
3. A vital signs fiber optic sensor comprising: a light source unit (3), a receiving unit (4) and at least one optical fiber sensing unit according to claim 1 or 2;
the light incident end of the optical fiber sensing unit is connected with the output end of the light source unit (3), and the light emergent end of the optical fiber sensing unit is connected with the receiving unit (4).
4. A vital sign fiber optic sensor according to claim 3, characterized in that the receiving unit (4) comprises a first receiver (41) and a second receiver (42), the light exit end of the first sensing fiber (1) being connected to the first receiver (41) and the light exit end of the second sensing fiber (2) being connected to the second receiver (42).
5. A vital sign fiber optic sensor according to claim 3, comprising a plurality of said fiber optic sensing units serially connected in series.
6. An intelligent sensing device, characterized by comprising a base pad (5) and a vital sign fiber optic sensor according to any of claims 3-5;
the base pad (5) is provided with a first accommodating groove and a second accommodating groove which are arranged in a crossing way, and the first sensing optical fiber (1) and the second sensing optical fiber (2) are respectively positioned in the first accommodating groove and the second accommodating groove and are arranged in a lamination way.
7. The intelligent sensing device according to claim 6, wherein the first accommodation groove and the second accommodation groove extend along the S-shaped direction, and are arranged on the base pad (5) in a crossing manner to form a grid structure.
8. The intelligent sensing device according to claim 6, characterized in that a first sensing optical fiber (1) is located above a second sensing optical fiber (2), the first accommodation groove bottom height is higher than the second accommodation groove bottom height, an interlaced step matching the first sensing optical fiber (1) and the second sensing optical fiber (2) is formed at the intersection of the first accommodation groove and the second accommodation groove, and the second sensing optical fiber (2) is connected with a bottom pad (5) at the interlaced step.
9. The intelligent sensing device according to claim 6, further comprising a cover pad (6), the cover pad (6) being covered over the base pad (5).
10. The intelligent sensing device according to claim 6, wherein the bottom of the cover pad (6) is provided with a first pressing strip (7) and a second pressing strip (8) corresponding to the first sensing optical fiber (1) and the second sensing optical fiber (2), respectively.
11. The intelligent sensing device according to claim 10, characterized in that the first bead (7) and/or the second bead (8) are made of a silicone material.
12. Intelligent sensing device according to claim 10, characterized in that the cover mat (6) and/or the base mat (5) are made of glass fibre material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221906130.8U CN219782525U (en) | 2022-07-19 | 2022-07-19 | Vital sign optical fiber sensing unit, sensor and intelligent sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221906130.8U CN219782525U (en) | 2022-07-19 | 2022-07-19 | Vital sign optical fiber sensing unit, sensor and intelligent sensing device |
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| Publication Number | Publication Date |
|---|---|
| CN219782525U true CN219782525U (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221906130.8U Active CN219782525U (en) | 2022-07-19 | 2022-07-19 | Vital sign optical fiber sensing unit, sensor and intelligent sensing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN219782525U (en) |
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2022
- 2022-07-19 CN CN202221906130.8U patent/CN219782525U/en active Active
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