CN109602400A - Vital sign parameter monitoring device and method based on four cone fibre optic interferometers - Google Patents
Vital sign parameter monitoring device and method based on four cone fibre optic interferometers Download PDFInfo
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- CN109602400A CN109602400A CN201910072073.4A CN201910072073A CN109602400A CN 109602400 A CN109602400 A CN 109602400A CN 201910072073 A CN201910072073 A CN 201910072073A CN 109602400 A CN109602400 A CN 109602400A
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- 239000000835 fiber Substances 0.000 title claims abstract description 80
- 238000012806 monitoring device Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 15
- 210000001624 hip Anatomy 0.000 claims description 26
- 238000001228 spectrum Methods 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000005253 cladding Methods 0.000 claims description 6
- 230000000644 propagated effect Effects 0.000 claims description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 230000001902 propagating effect Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 230000001427 coherent effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 208000026106 cerebrovascular disease Diseases 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
-
- 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
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
- A61B5/02427—Details of sensor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
Abstract
The present invention proposes a kind of vital sign parameter monitoring device and method based on four cone fibre optic interferometers, it is characterized in that, including sequentially connected by transmission fiber: light source, four cone sensor fibres and photodetector, and the host computer being connect with the photodetector.Be compared to other interference-type optical fiber vital sign parameters monitoring system advantage: reference arm and interfere arm are not separated by, and avoid influence of the environment to reference arm.It itself is both sensor fibre and reference optical fiber for four cone sensor fibre sensings, the interference without extraneous the problem of influencing reference arm and to vital sign parameter monitoring.There is the advantages that structure is simple, and processing step is easy, and preparation is easy, and product stability is good, long service life simultaneously, real-time measurement may be implemented, reach and the vital sign parameter of human body is uninterruptedly measured, not only coherent source is available, and incoherent light source also can be used.
Description
Technical field
The invention belongs to vital sign parameter real time monitoring fields, more particularly to one kind is based on four cone fibre optic interferometers
Vital sign parameter monitoring device and method.
Background technique
Cerebrovascular disease incidence of disease persistently increases in recent years, and detects energy to the vital sign parameter real-time online of human body
Achieve the effect that prevent cardiovascular and cerebrovascular disease, intrusive and non-intrusion type two is roughly divided into for vital sign parameter monitoring device
Kind, intrusive vital sign parameter monitoring device need to closely meet place with person under test's skin, be not suitable for long term monitoring and use.Non-intruding
There are technical advantages for formula vital sign monitoring device, without that can measure the life of person under test with person under test's direct skin contact
Order physical sign parameters.But mostly electronic sensor monitoring device, is affected by electromagnetic interference, is not suitable for examining in CT and nuclear magnetic resonance
Use when looking into.Fibre optical sensor is not by electromagnetic interference, and therefore, the vital sign parameter sensor based on optical fiber is used for hospital even
There is some superiority in family.United States Patent (USP) US6498652B1 proposes to monitor vital sign parameter using fibre optic interferometer, in embodiment
In, it include a variety of fibre optic interferometers.Chinese patent is it is also proposed that carry out vital sign parameter using Mach-Zahnder interference principle
It monitors (Chinese patent CN206342462U).These fibre optic interferometers, there is pickup arm and reference arm, to make reference arm not by outer
The influence of boundary's environment increases the difficulty and cost of sensor encapsulation.
Summary of the invention
In view of the deficienciess of the prior art, the present invention by the improvement to fibre optic interferometer, makes it is not necessary that sensing is isolated
Arm and reference arm obtain vital sign parameter monitoring device of simple structure and low cost, high sensitivity.In the present invention program
In, the fibre core and covering of four cone sensor fibres of use are both used as reference arm, are also used as pickup arm.When body shake perturbation applies
When four cone sensor fibres, light intensity in interference phase difference, fiber core and covering can synchronous generations change, output intensity just with
Variation.By demodulation output intensity, the information of physical shocks can be restored, e.g., breathing, heartbeat and body are dynamic etc..Present invention tool
Body uses following technical scheme:
A kind of vital sign parameter monitoring device based on four cone fibre optic interferometers, which is characterized in that including passing through transmission fiber
It is sequentially connected: light source, four cone sensor fibres and photodetector, and the host computer being connect with the photodetector.
Preferably, the light source is FP or DFB or VECEL light source or white light source.
Preferably, the first transmission fiber is separately connected the output end of light source and the input terminal of four cone sensor fibres；Second passes
It loses fibre and is separately connected the output end of four cone sensor fibres and the input terminal of photodetector.
Preferably, first transmission fiber and the second transmission fiber are single mode optical fiber.
Preferably, the four cones sensor fibre has fibre core and covering, including two cone waists.
Preferably, the four cones sensor fibre uses length for 50cm, and the single mode optical fiber that inside and outside core diameter is 9/125um draws cone
It is made；The diameter of the cone waist is 50-70 microns, and the spacing of two cone waists is greater than 1cm.
Preferably, the four cone sensor fibre draws cone to be made using multimode fibre.
Preferably, the host computer extracts heartbeat message using FFT higher hamonic wave.
Preferably, the four cone sensor fibre draws cone to be made using following methods:
Step A1: intercepted length 50cm, inside and outside core diameter is that the structure of 9/125um forms single mode optical fiber by fibre core and covering；
Step A2: four cone sense lights of four wimble structures including two cone waists are formed using carbon dioxide laser fusion draw
It is fine；The diameter of the cone waist is 50-70 microns, and the spacing of two cone waists is greater than 1cm.
And the preferred working method of apparatus above, it is characterised in that:
If the operation wavelength of light source is λ, the output power of four cone sensor fibres is P；When incident light is the of four cone sensor fibres
When propagating at one cone waist, core model is split into basic mode and high-order mode, and basic mode and high-order mode are all transmitted in a fiber, then accumulates phase
It moves；The basic mode and high-order mode reconfigure at the second cone waist, interfere；Assuming that only being propagated jointly there are two mode, when two
When field is combined and generates a strength Interference relevant to wavelength, the interference output of four cone sensor fibres can be indicated
Are as follows:
；
；
WhereinIndicate the intensity of interference signal,、It is four cone sensor fibre fibre core basic modes and lowest-order cladding mode respectively
Intensity；、The effective refractive index of respectively four cone sensor fibre fibre core basic modes and lowest-order cladding mode；L is
The spacing of optical fiber two cone waists；
Body by human body is dynamic, breathing, heartbeat disturbance, the spectrum of the four cones sensor fibre drift about, operating wave strong point
Light intensity change；The output power of four cone sensor fibres, which changes, at this time is；The host computer passes through to photodetector
The analysis for acquiring signal obtains vital sign parameter information, and wherein heartbeat message is extracted using FFT higher hamonic wave.
The present invention and its preferred embodiment are compared to other interference-type optical fiber vital sign parameters monitoring system advantage: reference
Arm and interfere arm are not separated by, and avoid influence of the environment to reference arm.For four cone sensor fibre sensings, itself is both
Sensor fibre is reference optical fiber again, the interference without extraneous the problem of influencing reference arm and to vital sign parameter monitoring.Simultaneously
The advantages that simple with structure, processing step is easy, prepares and is easy, and product stability is good, long service life, may be implemented in real time
Measurement, reaches and uninterruptedly measures the vital sign parameter of human body, and not only coherent source is available, and incoherent light source also can be used.
Detailed description of the invention
The present invention is described in more detail with reference to the accompanying drawings and detailed description:
Fig. 1 is overall structure diagram of the embodiment of the present invention；
Fig. 2 is that the embodiment of the present invention four bores sensor fibre structural schematic diagram；
Fig. 3 is operation principle schematic diagram of the embodiment of the present invention；
Fig. 4 is result of implementation of embodiment of the present invention schematic diagram；
In figure: 11- light source；The first transmission fiber of 12-；13- tetra- bores sensor fibre；The second transmission fiber of 14-；15- photodetection
Device；16- host computer；131- first bores waist；132- second bores waist；Spectrum before 31- drift；Spectrum after 32- drift.
Specific embodiment
For the feature and advantage of this patent can be clearer and more comprehensible, special embodiment below is described in detail below:
As shown in Figure 1, the present embodiment device includes: including sequentially connected by transmission fiber: light source 11, four bores sensor fibre
13 and photodetector 15, and the host computer 16 being connect with photodetector 15.The host computer 16 is generally PC or intelligent hand
Machine is carried vital sign parameter and extracted with parser module, the extraction and algoritic module in addition to being mentioned using FFT higher hamonic wave
Except coring hop-information, using the existing vital sign parameter extraction of the prior art and parser, therefore seldom do herein
It repeats.
Specifically, in the present embodiment, light source 11 is FP or DFB or VECEL light source 11 or white light source 11.
First transmission fiber 12 is separately connected the output end of light source 11 and the input terminal of four cone sensor fibres 13；Second transmission
Optical fiber 14 is separately connected the output end of four cone sensor fibres 13 and the input terminal of photodetector 15.
First transmission fiber 12 and the second transmission fiber 14 are single mode optical fiber.
Specifically, four cone sensor fibres 13 draw cone to be made using following methods:
Step A1: intercepted length 50cm, inside and outside core diameter is that the structure of 9/125um forms general single mode light by fibre core and covering
It is fine；
Step A2: using the method for drawing cone, such as being formed as shown in Figure 2 using carbon dioxide laser fusion draw includes two
Bore four cone sensor fibres 13 of four wimble structures of waist；The diameter for boring waist is 50-70 microns, and the spacing of two cone waists is greater than 1cm.
Similarly, four cone sensor fibres 13 can also draw cone to be made using multimode fibre.
In the present embodiment, photodetector 15 can connect host computer 16 by wireless transmission methods such as bluetooths, with true
Protect the portability of single unit system.Vital sign parameter in host computer 16 extracts and parser module is for handling photoelectricity spy
The original signal that device 15 exports is surveyed, vital sign parameter information is then obtained.
The specific works method and principle of the present embodiment are as follows:
As shown in figure 3, in the initial state, if the operation wavelength of (laser) light source 11 is λ, four cone sensor fibres 13 is defeated at this time
Power is P out；When incident light is propagated at the first cone waist 131 of four cone sensor fibres 13, core model is split into basic mode and height
Rank mould, basic mode and high-order mode are all transmitted in a fiber, then cumulative phase；Basic mode and high-order mode are bored at waist 132 again second
Combination, interference；Assuming that only being propagated jointly there are two mode, when two fields are combined and are generated one relevant to wavelength strong
When degree interference, spectrum 31 before drift is formed, the interference output of four cone sensor fibres 13 can indicate are as follows:
；
；
WhereinIndicate the intensity of interference signal,、It is four cone sensor fibres, 13 fibre core basic mode and lowest-order cladding mode respectively
The intensity of formula；、Effective refraction of respectively four cone sensor fibre 13 fibre core basic modes and lowest-order cladding mode
Rate；L is the spacing of optical fiber two cone waists；
Body by human body is dynamic, breathing, heartbeat disturbance, refractive index and device length can change, four cone sensor fibres 13
Spectrum drift about, form spectrum 32 after drift, the light intensity of operating wave strong point changes；Four bore sensor fibres 13 at this time
Output power is changed by P；As shown in figure 4, host computer 16 can be obtained by the analysis for acquiring signal to photodetector 15
Vital sign parameter information is obtained, due to heartbeat fundamental frequency signal serious interference, wherein heartbeat message is extracted using FFT higher hamonic wave.
Interferometer is made according to multimode fibre, working principle belongs to multiple-beam interference, as a result similar.
This patent is not limited to above-mentioned preferred forms, anyone can obtain other each under the enlightenment of this patent
The vital sign parameter monitoring device and method based on four cone fibre optic interferometers of kind form, it is all according to scope of the present invention patent
The equivalent changes and modifications done should all belong to the covering scope of this patent.
Claims (10)
1. a kind of vital sign parameter monitoring device based on four cone fibre optic interferometers, which is characterized in that including passing through transmission light
It is fine sequentially connected: light source, four cone sensor fibres and photodetector, and the host computer being connect with the photodetector.
2. the vital sign parameter monitoring device according to claim 1 based on four cone fibre optic interferometers, it is characterised in that:
The light source is FP or DFB or VECEL light source or white light source.
3. the vital sign parameter monitoring device according to claim 1 based on four cone fibre optic interferometers, it is characterised in that:
First transmission fiber is separately connected the output end of light source and the input terminal of four cone sensor fibres；Second transmission fiber is separately connected four
Bore the output end of sensor fibre and the input terminal of photodetector.
4. the vital sign parameter monitoring device according to claim 3 based on four cone fibre optic interferometers, it is characterised in that:
First transmission fiber and the second transmission fiber are single mode optical fiber.
5. the vital sign parameter monitoring device according to claim 1 based on four cone fibre optic interferometers, it is characterised in that:
The four cones sensor fibre has fibre core and covering, including two cone waists.
6. the vital sign parameter monitoring device according to claim 5 based on four cone fibre optic interferometers, it is characterised in that:
The four cones sensor fibre uses length for 50cm, and the single mode optical fiber that inside and outside core diameter is 9/125um draws cone to be made；The cone waist
Diameter is 50-70 microns, and the spacing of two cone waists is greater than 1cm.
7. the vital sign parameter monitoring device according to claim 1 based on four cone fibre optic interferometers, it is characterised in that:
The four cone sensor fibre draws cone to be made using multimode fibre.
8. the vital sign parameter monitoring device according to claim 1 based on four cone fibre optic interferometers, it is characterised in that:
The host computer extracts heartbeat message using FFT higher hamonic wave.
9. the vital sign parameter monitoring device according to claim 1 based on four cone fibre optic interferometers, which is characterized in that
The four cone sensor fibre draws cone to be made using following methods:
Step A1: intercepted length 50cm, inside and outside core diameter is that the structure of 9/125um forms single mode optical fiber by fibre core and covering；
Step A2: four cone sense lights of four wimble structures including two cone waists are formed using carbon dioxide laser fusion draw
It is fine；The diameter of the cone waist is 50-70 microns, and the spacing of two cone waists is greater than 1cm.
10. the working method of the vital sign parameter monitoring device according to claim 5 based on four cone fibre optic interferometers,
It is characterized by:
If the operation wavelength of light source is λ, the output power of four cone sensor fibres is P；When incident light is the of four cone sensor fibres
When propagating at one cone waist, core model is split into basic mode and high-order mode, and basic mode and high-order mode are all transmitted in a fiber, then accumulates phase
It moves；The basic mode and high-order mode reconfigure at the second cone waist, interfere；Assuming that only being propagated jointly there are two mode, when two
When field is combined and generates a strength Interference relevant to wavelength, the interference output of four cone sensor fibres can be indicated
Are as follows:
；
；
WhereinIndicate the intensity of interference signal,、It is four cone sensor fibre fibre core basic modes and lowest-order cladding mode respectively
Intensity；、The effective refractive index of respectively four cone sensor fibre fibre core basic modes and lowest-order cladding mode；L is light
The spacing of fine two cones waist；
Body by human body is dynamic, breathing, heartbeat disturbance, the spectrum of the four cones sensor fibre drift about, operating wave strong point
Light intensity change；The output power of four cone sensor fibres, which changes, at this time is；The host computer passes through to photodetector
The analysis for acquiring signal obtains vital sign parameter information, and wherein heartbeat message is extracted using FFT higher hamonic wave.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910072073.4A CN109602400A (en) | 2019-01-25 | 2019-01-25 | Vital sign parameter monitoring device and method based on four cone fibre optic interferometers |
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| CN201910072073.4A CN109602400A (en) | 2019-01-25 | 2019-01-25 | Vital sign parameter monitoring device and method based on four cone fibre optic interferometers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021614A1 (en) * | 2020-07-29 | 2022-02-03 | 泉州师范学院 | Contactless intelligent monitor and detection method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060278240A1 (en) * | 2002-11-18 | 2006-12-14 | Spillman William B Jr | System, device, and method for detecting perturbations |
| CN106793878A (en) * | 2014-09-30 | 2017-05-31 | 深圳市大耳马科技有限公司 | Attitude and life sign monitor system and method |
| CN206342462U (en) * | 2016-10-19 | 2017-07-21 | 苏州安莱光电科技有限公司 | A kind of optical fiber vital sign supervising device based on Mach-Zahnder interference |
| CN108398403A (en) * | 2018-03-26 | 2018-08-14 | 福建硅光通讯科技有限公司 | A kind of cone of wavelength modulation type four light fibre humidity transducer |
-
2019
- 2019-01-25 CN CN201910072073.4A patent/CN109602400A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060278240A1 (en) * | 2002-11-18 | 2006-12-14 | Spillman William B Jr | System, device, and method for detecting perturbations |
| CN106793878A (en) * | 2014-09-30 | 2017-05-31 | 深圳市大耳马科技有限公司 | Attitude and life sign monitor system and method |
| CN206342462U (en) * | 2016-10-19 | 2017-07-21 | 苏州安莱光电科技有限公司 | A kind of optical fiber vital sign supervising device based on Mach-Zahnder interference |
| CN108398403A (en) * | 2018-03-26 | 2018-08-14 | 福建硅光通讯科技有限公司 | A kind of cone of wavelength modulation type four light fibre humidity transducer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021614A1 (en) * | 2020-07-29 | 2022-02-03 | 泉州师范学院 | Contactless intelligent monitor and detection method therefor |
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Application publication date: 20190412 |