CN114617534A - Optical fiber pulse wave sensor - Google Patents
Optical fiber pulse wave sensor Download PDFInfo
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- CN114617534A CN114617534A CN202210173577.7A CN202210173577A CN114617534A CN 114617534 A CN114617534 A CN 114617534A CN 202210173577 A CN202210173577 A CN 202210173577A CN 114617534 A CN114617534 A CN 114617534A
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- optical fiber
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- vacuole
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 96
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 210000003934 vacuole Anatomy 0.000 claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 229920001410 Microfiber Polymers 0.000 claims description 15
- 239000003658 microfiber Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 9
- 238000000411 transmission spectrum Methods 0.000 claims description 4
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 239000005341 toughened glass Substances 0.000 claims description 3
- 239000002121 nanofiber Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 7
- 239000004744 fabric Substances 0.000 description 3
- 208000024172 Cardiovascular disease Diseases 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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Classifications
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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
- A61B5/02—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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61B5/02007—Evaluating blood vessel condition, e.g. elasticity, compliance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Molecular Biology (AREA)
- Physiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Physics & Mathematics (AREA)
- Vascular Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention relates to the technical field of optical sensors, in particular to an optical fiber pulse wave sensor, which comprises: the optical fiber comprises a micro-nano optical fiber, a vacuole, an elastic substrate and a hard substrate; the micro-nano optical fiber comprises a first micro-optical fiber end region, a first micro-optical fiber conical region, a micro-optical fiber uniform region, a second micro-optical fiber conical region and a second micro-optical fiber end region which are sequentially arranged; the micro-optical fiber uniform area is immersed in the vacuole, the first micro-optical fiber end area, the second micro-optical fiber end area, the first micro-optical fiber conical area, the second micro-optical fiber conical area, the micro-optical fiber uniform area and the vacuole are all wrapped inside the elastic substrate, the outer measuring ends of the first micro-optical fiber end area and the second micro-optical fiber end area extend to the outside of the elastic substrate, the diameters of the inner side ends are sequentially reduced from outside to inside and extend into the vacuole, and the elastic substrate is attached to the hard substrate. The optical fiber pulse wave sensor has the characteristics of high sensitivity, high precision, continuous detection, simple manufacture, convenient operation, low cost, wearability and easy practicability.
Description
Technical Field
The invention relates to the technical field of optical sensors, in particular to an optical fiber pulse wave sensor.
Background
Cardiovascular diseases are the number one killer which causes human death at present, and because the cardiovascular diseases are easy to burst and are not easy to be perceived after a long incubation period, real-time monitoring is very important for protecting the lives of people. The pulse wave is the simplest physiological parameter and can be used for indirectly measuring important physiological parameters such as blood pressure, electrocardio and the like.
At present, noninvasive continuous pulse measuring equipment adopts an electric sensor to obtain physiological signals of a human body, and the electric sensor has the problems of large volume, difficulty in weaving into fabrics, poor wearing comfort, easiness in receiving external electromagnetic interference, incapability of using in special environments such as a strong magnetic field and the like, and in addition, the problem of personal safety can be caused by long-term wearing.
Compared with the prior art, the optical sensor has the characteristics of intrinsic safety, small volume, electromagnetic interference resistance, corrosion resistance, easiness in forming a distributed sensing network and the like, can collect pulse waves under special conditions (such as strong electromagnetic environment), particularly has compatibility between optical fibers and yarns, can be woven into fabric to form a real fabric sensor, improves wearing comfort, and can collect the pulse waves without influencing normal activities of people.
Disclosure of Invention
The invention aims to provide a novel optical fiber pulse wave sensor which can continuously measure a human pulse wave signal with high precision.
In order to realize the purpose, the invention adopts the technical scheme that:
a fiber optic pulse wave sensor comprising: micro-nano optical fibers, vacuoles, elastic substrates and hard substrates;
the micro-nano optical fiber comprises a first micro-optical fiber end region, a first micro-optical fiber conical region, a micro-optical fiber uniform region, a second micro-optical fiber conical region and a second micro-optical fiber end region which are sequentially arranged; the micro-optical fiber uniform area is immersed in the vacuole, the first micro-optical fiber end area, the second micro-optical fiber end area, the first micro-optical fiber conical area, the second micro-optical fiber conical area, the micro-optical fiber uniform area and the vacuole are all wrapped inside the elastic substrate, the outer measuring ends of the first micro-optical fiber end area and the second micro-optical fiber end area all extend to the outside of the elastic substrate, the diameters of the inner side ends are sequentially reduced from outside to inside and extend into the vacuole, and the elastic substrate is attached to the hard substrate.
Furthermore, the micro-nano optical fiber is manufactured in a melting heating tapering mode, and a first micro-optical fiber end region, a first micro-optical fiber conical region, a micro-optical fiber uniform region, a second micro-optical fiber conical region and a second micro-optical fiber end region are integrally formed.
Furthermore, one end of the first micro optical fiber end region and one end of the second micro optical fiber end region are connected with the light source for inputting optical signals, the other end of the first micro optical fiber end region and the second micro optical fiber end region are connected with the spectrometer for outputting optical signals, and the two ends of the first micro optical fiber end region and the second micro optical fiber end region are not different and form an optical signal channel.
Furthermore, the vacuole adopts refractive index matching fluid with low refractive index.
Furthermore, the elastic substrate is made of PDMS, and the hard substrate 8 is made of a toughened glass plate.
Furthermore, the vacuole is used for amplifying weak jitter signals of the elastic substrate 7, is effectively applied to a uniform area of the micro-nano optical fiber, is changed into signal fluctuation on a transmission spectrum, and realizes measurement of pulse waves through measurement of the change of the spectrum.
The optical fiber pulse wave sensor has the characteristics of high sensitivity, high precision, continuous detection, simple manufacture, convenient operation, low cost, wearability and easy practicability.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of a fiber pulse wave sensor according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a fiber pulse wave sensor according to an embodiment of the present invention;
in the figure: 1-a first micro-fiber end region; 2-a second micro fiber taper region; 3-a first micro fiber taper region; 4-a second micro-fiber termination region; 5-micro fiber uniform area; 6-vacuole; 7-an elastic substrate; 8-hard substrate.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1-2, an embodiment of the present invention provides a fiber pulse wave sensor, including: the optical fiber comprises a micro-nano optical fiber, a vacuole 6, an elastic substrate 7 and a hard substrate 8;
the micro-nano optical fiber is prepared by melting, heating and tapering, the first micro-optical fiber tapered region 3 and the second micro-optical fiber tapered region 4 are respectively positioned at two ends of the micro-optical fiber uniform region 5, the first micro-optical fiber end region 1 is positioned at the outer end of the first micro-optical fiber tapered region 3, and the second micro-optical fiber end region 2 is positioned at the outer end of the second micro-optical fiber tapered region 4; one end of the first micro optical fiber terminal area 1 and one end of the second micro optical fiber terminal area 2 are connected with a light source for inputting optical signals, the other end of the first micro optical fiber terminal area is connected with a spectrometer for outputting optical signals, and the two ends of the first micro optical fiber terminal area and the second micro optical fiber terminal area are not different and form an optical signal channel.
In this embodiment, the micro optical fiber uniform region 5 is immersed in the vacuole 6, the first micro optical fiber end region 1, the second micro optical fiber end region 2, the first micro optical fiber taper region 3, the second micro optical fiber taper region 4, the micro optical fiber uniform region 5 and the vacuole 6 are all wrapped inside the elastic substrate 7, the outer ends of the first micro optical fiber end region 1 and the second micro optical fiber end region 2 extend to the outside of the elastic substrate 7, the diameters of the inner ends are sequentially reduced from the outside to the inside and extend into the vacuole 6, and the elastic substrate 7 is attached to the hard substrate 8;
in this embodiment, the vacuole 6 is made of a refractive index matching fluid with a low refractive index, the elastic substrate 7 is made of PDMS, and the hard substrate 8 is made of a tempered glass plate. The elasticity of elastic substrate can be adjusted as required, and the stereoplasm base plate provides for elastic optical fiber sensor and carries the support, guarantees that optic fibre does not break in the measurement process, can do processing on it simultaneously for realize the application form of wrist strap, paster.
According to the specific implementation, a complete optical signal system can be simply built through two ends of the micro-nano optical fiber, the structural form that the micro-nano optical fiber 1 is wrapped by the vacuole 6 is adopted, a weak shaking signal of the elastic substrate 7 is amplified and effectively implemented in the uniform area 5 of the micro-nano optical fiber, the shaking signal is changed into signal fluctuation on a transmission spectrum, and the pulse wave is measured through the change of a measurement spectrum.
When the pulse wave sensor is used, the hard substrate is attached to the skin near a blood vessel, the slight fluctuation of the pulse is amplified and implemented on the micro-nano optical fiber through the transmission of vacuoles, an instantaneous strain is formed, a jitter signal is generated on a transmission spectrum, the continuously measured jitter signal can represent the pulse, the continuous sensing measurement of the pulse wave is realized, and the measurement precision is high.
The specific implementation preparation method is simple and mature, the cost is low, the amplification and transmission of the weak pulse type on the body surface of a human body can be effectively realized by packaging the micro-nano optical fiber sensitive area in a vacuole mode, the high-sensitivity, high-precision and continuous measurement of the pulse of the human body can be realized, more human physiological information can be analyzed, and the preliminary characterization of the information of the blood pressure, the electrocardiogram and the like of the human body can be realized through a simple mode.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (6)
1. A fiber optic pulse wave sensor, comprising: the device comprises a micro-nano optical fiber, a vacuole (6), an elastic substrate (7) and a hard substrate (8);
the micro-nano optical fiber comprises a first micro-optical fiber end region (1), a first micro-optical fiber conical region (3), a micro-optical fiber uniform region (5), a second micro-optical fiber conical region (4) and a second micro-optical fiber end region (2) which are arranged in sequence; the uniform microfiber area (5) is immersed in the vacuole (6), the first microfiber end area (1), the second microfiber end area (2), the first microfiber cone area (3), the second microfiber cone area (4), the uniform microfiber area (5) and the vacuole (6) are wrapped inside the elastic substrate (7), the outer measuring ends of the first microfiber end area (1) and the second microfiber end area (2) extend to the outside of the elastic substrate (7), the diameter of the inner side end is reduced from outside to inside in sequence and extends into the vacuole (6), and the elastic substrate (7) is attached to the hard substrate (8).
2. The optical fiber pulse wave sensor according to claim 1, wherein the micro-nano optical fiber is manufactured by melting, heating and tapering, and a first micro-optical fiber end region (1), a first micro-optical fiber tapered region (3), a micro-optical fiber uniform region (5), a second micro-optical fiber tapered region (4) and a second micro-optical fiber end region (2) are integrally formed.
3. The fiber pulse wave sensor according to claim 1, wherein the first micro fiber end region (1) and the second micro fiber end region (2) are connected to a light source for inputting light signals at one end and to a spectrometer for outputting light signals at the other end, and form an optical signal path without distinction between the two ends.
4. The optical fiber pulse wave sensor according to claim 1, wherein the vacuole (6) is made of a refractive index matching fluid with a low refractive index.
5. The fiber pulse wave sensor according to claim 1, wherein the flexible substrate (7) is PDMS, and the rigid substrate (8) is a tempered glass plate.
6. The fiber pulse wave sensor according to claim 1, wherein the vacuole (6) is used for amplifying weak jitter signals of the elastic substrate (7), is effectively implemented in the uniform region (5) of the micro-nano fiber, and is changed into signal fluctuation on a transmission spectrum, and the pulse wave is measured by measuring the change of the spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173577.7A CN114617534A (en) | 2022-02-24 | 2022-02-24 | Optical fiber pulse wave sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173577.7A CN114617534A (en) | 2022-02-24 | 2022-02-24 | Optical fiber pulse wave sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114617534A true CN114617534A (en) | 2022-06-14 |
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ID=81899231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210173577.7A Withdrawn CN114617534A (en) | 2022-02-24 | 2022-02-24 | Optical fiber pulse wave sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114617534A (en) |
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2022
- 2022-02-24 CN CN202210173577.7A patent/CN114617534A/en not_active Withdrawn
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Application publication date: 20220614 |