CN111239092A - Optical fiber type CO2、O2Concentration rapid acquisition probe - Google Patents
Optical fiber type CO2、O2Concentration rapid acquisition probe Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
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- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
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- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N2021/6484—Optical fibres
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Abstract
The invention discloses and provides an optical fiber type CO2 and O2 concentration rapid acquisition probe, which comprises a light emitting part, a light receiving part and an optical fiber main body, wherein the light emitting part is arranged on the light receiving part; the light emitting section includes a first light emitting element and a second light emitting element; the optical fiber main body is hollow cylindrical, the glass state light guide column is arranged on the inner side of the optical fiber main body, the protective sleeve is arranged on the outer side of the optical fiber main body, and the light receiving part is arranged in the middle of the inner side of the glass state light guide column; the light receiving part comprises an oval carrier, an oxygen fluorescent sensitive film and a carbon dioxide fluorescent sensitive film; the oxygen fluorescent sensitive film and the carbon oxide fluorescent sensitive film are attached to two sides of the oval carrier. The invention can realize the sampling of O2 and CO2 measuring signals of real-time ultrafast reaction; and the light sensitive signals measured by the ultra-fast reaction O2 and CO2 can be directly converted into electric signals, so that the measurement time delay error is reduced; meanwhile, sampling time delay caused by the need of a micro pump of the traditional CO2 and O2 analysis devices is directly avoided, and the reaction time and accuracy of CO2 and O2 measurement are realized.
Description
Technical Field
The invention relates to the technical field of photoelectric sensors, in particular to an optical fiber type probe for rapidly collecting CO2 and O2 concentrations.
Background
The whole body of a human body needs to rely on oxygen to burn energy stored in the body, so that the energy is changed into heat energy, and organs and muscles can move only by obtaining the heat energy. Oxygen is inhaled from the lungs, so the lung volume and activity times are important; the heart is responsible for delivering oxygen to various organs and parts through the blood circulation system, so the strength of the heart pulsation affects the blood flow.
Thus, the cardiopulmonary functions include the circulation rate of blood, the strength of the heart beats, and the capacity and frequency of the lungs. Exercise testing is preferred for measuring cardiopulmonary function, because the demand for oxygen is very high during exercise, and it is most effective to test the activity of the heart and lungs. Cardiopulmonary function refers to a person's ability to take oxygen and convert it into energy. The whole process involves the functions of blood production and pumping of the heart, the ability of the lungs to take oxygen and exchange gas, the efficiency of the blood circulation system to carry oxygen to various parts of the body, and the function of the muscles to use this oxygen. The heart-lung exercise test is to judge the reserve functions of heart, lung, skeletal muscle and the like and the actual endurance capacity of the body to exercise by observing various reactions of a subject during exercise, such as respiration, blood pressure, heart rate, electrocardiogram, gas metabolism, clinical symptoms and signs and the like. The cardio-pulmonary endurance can represent the capability of the human body for continuous physical activities, reflects the cardio-pulmonary function condition of the human body under certain exercise intensity, and is one of important indexes in a health fitness evaluation index system. In performing cardiopulmonary endurance testing, it is desirable to detect parameters of the breathing gas of a subject, such as the flow rate of the breathing gas, the oxygen concentration and the carbon dioxide concentration of the breathing gas.
However, in the prior art, the measurement of the oxygen concentration and the carbon dioxide concentration of the respiratory gas is performed by sampling at the respiratory end by a sampling pump, and then analysis is performed, so that the analysis result has high delay and cannot be synchronous with a flow curve, and the result is inaccurate due to the mixing of the sampled gases due to molecular motion.
Therefore, the problem to be solved by those skilled in the art is how to provide a fiber-optic rapid CO2 and O2 concentration acquisition probe capable of sampling oxygen and carbon dioxide in respiratory gas in real time to ensure accurate detection results.
Disclosure of Invention
The flow of respiratory gas generally adopts the flow sensor in the existing cardiopulmonary exercise tester, can detect the flow output electrical signal curve chart of the respiratory gas in real time, but when detecting the concentration of oxygen and carbon dioxide, when sampling the respiratory gas of a subject, the respiratory gas can reach the detection equipment end through an air guide hose, then the concentration of oxygen and carbon dioxide are detected, the respiratory gas sample collected by the method has the following defects when detecting, firstly, the air guide hose has a certain length, and the respiratory gas reaches the detection equipment end for a certain time, so the detected detection results of the concentration of oxygen and carbon dioxide are asynchronous with the detection result of the flow of the respiratory gas, which causes the lag of result analysis; secondly, the breathing gas collides with each other in the flowing process of the air guide hose, and meanwhile, the diameters of all parts of the air guide hose are different, so that the flowing sequence of the breathing gas in the air guide hose changes, that is, the gas sucked out by the back breathing possibly mixes with the gas sucked in the front breathing, so that the sampling cannot be performed according to the front and back sequence of the breathing, and the samples at the same breathing time are difficult to acquire, so that the samples for detecting the concentrations of oxygen and carbon dioxide and the samples for detecting the flow of the breathing gas are not the samples at the same breathing time, the comprehensive analysis of breathing gas parameters of the subject is inaccurate, and the judgment result of the comprehensive index of the subject is influenced.
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art.
Therefore, an object of the present invention is to provide an optical fiber type CO2 and O2 rapid concentration acquisition probe, so as to solve the technical problems that the oxygen concentration and the carbon dioxide concentration cannot be sampled in real time, the delay is high, and the error rate is large in the existing cardiopulmonary exercise test.
In order to achieve the purpose, the invention adopts the following technical scheme: an optical fiber type probe for rapidly collecting CO2 and O2 concentration comprises a light emitting part, a light receiving part and an optical fiber main body;
the light emitting section includes a first light emitting element and a second light emitting element; a first light-emitting element that emits laser light in a wavelength band including a light absorption spectrum of a first measurement target gas; a second light emitting element that emits laser light in a wavelength band including a light absorption spectrum of a second measurement target gas;
the optical fiber main body is in a hollow cylindrical shape, a glass state light guide column is arranged on the inner side of the optical fiber main body, a protective sleeve is arranged on the outer side of the optical fiber main body, and the light receiving part is arranged in the middle of the inner side of the glass state light guide column;
the light receiving part comprises an oval carrier, an oxygen fluorescent sensitive film and a carbon dioxide fluorescent sensitive film; the oxygen fluorescent sensitive film and the carbon oxide fluorescent sensitive film are attached to two sides of the oval carrier.
By adopting the technical scheme, the first light-emitting element and the second light-emitting element emit laser to irradiate on the breathing gas, and the breathing gas is scattered and reflected to the oxygen fluorescent sensitive film and the carbon dioxide fluorescent sensitive film on the oval carrier of the light receiving part, so that the first light-emitting element and the second light-emitting element irradiate on the oxygen fluorescent sensitive film and the carbon dioxide fluorescent sensitive film after scattering and reflection. The elliptical oxygen fluorescent sensitive film and the elliptical carbon dioxide fluorescent sensitive film are designed to have large receiving areas for scattered and reflected light, so that the fluorescence can be received with the maximum efficiency. Therefore, the invention can effectively reduce the energy loss of light transmission and has the characteristics of high fluorescence excitation efficiency, high light energy utilization rate, high fluorescence receiving efficiency and high detection efficiency.
Further, the major axis of the elliptical carrier is the same as the diameter of the glassy light guide column.
Further, the glass state light guide column protrudes out of the optical fiber main body and forms an included angle of 10 degrees to 45 degrees with the optical fiber main body.
Preferably, the glass state light guide column protrudes out of the optical fiber main body and forms an included angle of 30 degrees with the optical fiber main body.
By adopting the technical scheme, the reflection area of laser emitted by the first light-emitting element and the second light-emitting element can be ensured, the accuracy of measuring the oxygen concentration and the carbon dioxide concentration can be ensured, the mechanical strength of the whole glass state light guide column and the optical fiber main body can be ensured, and the collision damage during installation can be reduced.
Furthermore, the device also comprises a signal receiving device arranged in the middle of the oval carrier, and the signal receiving device converts the optical signal into an electric signal. Preferably, the signal receiving means is a charge coupled photodetector.
Further, the laser wavelength emitted by the first light-emitting element and the second light-emitting element is 2-450 nm; strong absorption line 6359.97cm-1I.e. R16E, line intensity 1.744E23cm/mol and secondary line of weakness 6362.5cm-1I.e., R20E, line intensity was 1.623E23 cm/mol.
Furthermore, the oxygen fluorescent sensitive membrane and the carbon dioxide fluorescent sensitive membrane are both obtained by fixing fluorescent sensitive substances in certain inorganic or organic semi-permeable membrane materials through a sol-gel technology.
Preferably, the selection of the oxygen fluorescent sensitive film is as follows: the fluorocarbon sol-gel matrix is formed by embedding a fluorescent substance, wherein the molar ratio of the fluorescent substance to the fluorocarbon sol-gel matrix is 1-30. The fluorescent substance is metal ruthenium complex, metal osmium complex, metal lead complex, metal platinum complex, metal palladium complex, or metal rhenium complex; the fluorocarbon sol-gel matrix is a hydrolyzed copolymer of trifluoropropyltrimethoxysilane TFP-TriMOS and other siloxane monomers; the volume ratio of TFP-TriMOS to other siloxane monomers is 0.25-4; other siloxane monomers are tetramethoxysilane TMOS, tetraethoxysilane TEOS, methyltrimethoxysilane MTMOS, methyltriethoxysilane MTEOS, propyltrimethoxysilane PTMOS or propyltriethoxysilane PTEOS.
Preferably, the selection of the carbon dioxide fluorescence sensitive film is as follows: the principle of the polyvinyl chloride sensitive membrane fixed with the tourmaline based on the fluorescence breaking and extinguishing principle is that the fluorescence enhancement effect of cyclodextrin on the tourmaline is utilized, and the fluorescence can be broken and extinguished by carbon dioxide in a solution, the membrane has the advantages of high response speed, good reproducibility and strong anti-interference capability, and the range of measuring carbonic acid reaches 4.75 multiplied by 10 < -7 > to 3.90 multiplied by 10 < -5 > mol/L.
By adopting the technical scheme, the oxygen concentration measurement and carbon dioxide concentration measurement time of the oxygen fluorescence sensitive membrane and the carbon dioxide fluorescence sensitive membrane are short, the traditional O2 and CO2 measurement is avoided essentially, the sampling time delay and the O2 and CO2 measurement delay generated by respectively measuring the sampling time from a flowmeter through a micro pump and then sending the sampling time to O2 and CO2 measurement devices which react relatively slowly are avoided, the errors of continuously and dynamically accumulating and calculating the oxygen uptake and carbon dioxide discharge amount in each respiratory cycle are reduced, and the instrument detection accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a graph showing CO2 and O2 concentration and flow measurement curves in the prior art provided by the present invention;
FIG. 2 is a graph showing the adjusted CO2 and O2 concentrations and flow error curves in the prior art;
fig. 3 is a schematic diagram of the overall structure of an optical fiber type CO2 and O2 concentration rapid acquisition probe provided by the invention;
fig. 4 is a schematic cross-sectional structure diagram of an optical fiber type CO2 and O2 concentration rapid acquisition probe provided by the invention.
In the figure, 1 is a light emitting part, 11 is a first light emitting element, 12 is a second light emitting element, 2 is a light receiving part, 21 is an elliptical carrier, 22 is an oxygen fluorescent sensitive film, 23 is a carbon dioxide fluorescent sensitive film, 3 is an optical fiber cylinder, 31 is a glass state light guide column, and 32 is a protective sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2: in the existing cardiopulmonary exercise tester in the prior art, a flow sensor is generally adopted for the flow of respiratory gas, and a flow output electric signal curve graph of the respiratory gas can be detected in real time, but when the concentration of oxygen and the concentration of carbon dioxide are detected, when the respiratory gas of a subject is sampled, the respiratory gas can reach a detection device end through an air guide hose, and then the concentration of oxygen and the concentration of carbon dioxide are detected.
In the figure: 1. the expiratory flow and starting concentration change volume signals are anatomically exhaled out of the dead space with a time interval between the start of approximately 300 milliseconds.
2. The abrupt change at the end of expiration appears as a concentration signal and also as the flow crosses zero.
3. Flow integration begins when respiratory flow ceases and a threshold flow rate is exceeded. Digital frequency: 125 Hz. The drawing interval is 24 milliseconds.
Firstly, the air guide hose has a certain length, and a certain time is required for the respiratory gas to reach the detection equipment end, so that the detection results of the detected oxygen concentration and carbon dioxide concentration are asynchronous with the detection result of the respiratory gas flow, and the result analysis is delayed; secondly, the breathing gas collides with each other in the flowing process of the air guide hose, and meanwhile, the diameters of all parts of the air guide hose are different, so that the flowing sequence of the breathing gas in the air guide hose changes, that is, the gas sucked out by the back breathing possibly mixes with the gas sucked in the front breathing, so that the sampling cannot be performed according to the front and back sequence of the breathing, and the samples at the same breathing time are difficult to acquire, so that the samples for detecting the concentrations of oxygen and carbon dioxide and the samples for detecting the flow of the breathing gas are not the samples at the same breathing time, the comprehensive analysis of breathing gas parameters of the subject is inaccurate, and the judgment result of the comprehensive index of the subject is influenced.
As shown in fig. 3-4: the embodiment of the embodiment discloses an optical fiber type probe for rapidly collecting CO2 and O2 concentration, which comprises a light emitting part 1, a light receiving part 2 and an optical fiber main body 3;
the light emitting section 1 includes a first light emitting element 11 and a second light emitting element 12; the first light-emitting element 11 emits laser light in a wavelength band including a light absorption spectrum of the first measurement target gas; the second light emitting element 12 emits laser light in a wavelength band including the light absorption spectrum of the second measurement target gas;
the optical fiber main body 3 is hollow cylindrical, the glass state light guide column 31 is arranged on the inner side, the protective sleeve 32 is arranged on the outer side, and the light receiving part 2 is arranged in the middle of the inner side of the glass state light guide column 31;
the light receiving part 2 comprises an elliptical carrier 21, an oxygen fluorescent sensitive film 22 and a carbon dioxide fluorescent sensitive film 23; the oxygen fluorescent sensitive film 22 and the carbon oxide fluorescent sensitive film 23 are attached to two sides of the elliptical carrier 21.
In the present embodiment, the first light emitting element 11 and the second light emitting element 12 emit laser light, and the laser light irradiates on the respiratory gas, and the respiratory gas is scattered and reflected to the oxygen fluorescent sensitive film 22 and the carbon dioxide fluorescent sensitive film 23 on the elliptical carrier 21 of the light receiving portion 2, so that the first light emitting element 11 and the second light emitting element 12 irradiate on the oxygen fluorescent sensitive film 22 and the carbon dioxide fluorescent sensitive film 23 after scattering and reflection. The elliptical oxygen fluorescent sensing film 22 and the carbon dioxide fluorescent sensing film 23 are designed to have a large receiving area for scattered and reflected light, so that the fluorescence can be received with maximum efficiency. Therefore, the invention can effectively reduce the energy loss of light transmission and has the characteristics of high fluorescence excitation efficiency, high light energy utilization rate, high fluorescence receiving efficiency and high detection efficiency.
In this embodiment, the major axis of the elliptical carrier 21 is the same as the diameter of the glass light guide pillar 31.
In this embodiment, the glass state light guide pillar 31 protrudes out of the optical fiber body 3 and forms an included angle of 30 ° with the optical fiber body 3.
In other embodiments, the glassy light guide 31 protrudes from the fiber body 3 and forms an angle of 10 ° to 45 ° with the fiber body 3.
By adopting the technical scheme, the reflection areas of the laser emitted by the first light-emitting element 11 and the second light-emitting element 12 can be ensured, the accuracy of measuring the oxygen concentration and the carbon dioxide concentration can be ensured, the mechanical strength of the whole glass state light guide column 31 and the optical fiber main body 3 can be ensured, and the collision damage during installation can be reduced.
In this embodiment, the optical fiber cable further includes a signal receiving device disposed in the middle of the oval carrier 21, and the signal receiving device converts the optical signal into an electrical signal. Preferably, the signal receiving means is a charge coupled photodetector.
In other embodiments, the laser wavelength emitted by the first light emitting element 11 and the second light emitting element 12 is 2-450 nm; strong absorption line 6359.97cm-1I.e. R16E, line intensity 1.744E23cm/mol and secondary line of weakness 6362.5cm-1I.e., R20E, line intensity was 1.623E23 cm/mol.
In the laser of the embodiment, the peak wavelength is 450nm, the peak wavelength covers the absorption spectrum of the luminophor, and the strong absorption line 6359.97cm-1, namely R16E, the line intensity 1.744E23cm/mol and the second weak line 6362.5cm-1, namely R20E are adopted in the embodiment, and the line intensity is 1.623E23 cm/mol.
In this embodiment, the oxygen fluorescent sensing membrane 22 and the carbon dioxide fluorescent sensing membrane 23 are both obtained by fixing fluorescent sensing substances in a certain inorganic or organic semi-permeable membrane material by a sol-gel technique.
Specifically, the oxygen fluorescent sensitive film 22 is selected: the fluorocarbon sol-gel matrix is formed by embedding a fluorescent substance, wherein the molar ratio of the fluorescent substance to the fluorocarbon sol-gel matrix is 1-30. The fluorescent substance is metal ruthenium complex, metal osmium complex, metal lead complex, metal platinum complex, metal palladium complex, or metal rhenium complex; the fluorocarbon sol-gel matrix is a hydrolyzed copolymer of trifluoropropyltrimethoxysilane TFP-TriMOS and other siloxane monomers; the volume ratio of TFP-TriMOS to other siloxane monomers is 0.25-4; other siloxane monomers are tetramethoxysilane TMOS, tetraethoxysilane TEOS, methyltrimethoxysilane MTMOS, methyltriethoxysilane MTEOS, propyltrimethoxysilane PTMOS or propyltriethoxysilane PTEOS.
Specifically, the carbon dioxide fluorescence sensitive film 23 is selected: the principle of the polyvinyl chloride sensitive membrane fixed with the tourmaline based on the fluorescence breaking and extinguishing principle is that the fluorescence enhancement effect of cyclodextrin on the tourmaline is utilized, and the fluorescence can be broken and extinguished by carbon dioxide in a solution, the membrane has the advantages of high response speed, good reproducibility and strong anti-interference capability, and the range of measuring carbonic acid reaches 4.75 multiplied by 10 < -7 > to 3.90 multiplied by 10 < -5 > mol/L.
The oxygen fluorescence sensitive membrane 22 and the carbon dioxide fluorescence sensitive membrane 23 of the embodiment have short time for measuring the oxygen concentration and the carbon dioxide concentration, and the invention essentially avoids the sampling time delay and the O2 and CO2 measurement delay generated by the traditional O2 and CO2 measurement which is sampled from a flowmeter through a micro pump and then sent to a relatively slow-reaction O2 and CO2 measurement device to respectively measure, thereby reducing the errors of continuously and dynamically accumulating and calculating the oxygen uptake amount and the carbon dioxide discharge amount in each respiratory cycle and improving the accuracy of instrument detection.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An optical fiber type probe for rapidly collecting CO2 and O2 concentration is characterized by comprising a light emitting part (1), a light receiving part (2) and an optical fiber main body (3);
the light-emitting section (1) includes a first light-emitting element (11) and a second light-emitting element (12); the first light-emitting element (11) emits laser light in a wavelength band including a light absorption spectrum of a first measurement target gas; the second light-emitting element (12) emits laser light in a wavelength band including the light absorption spectrum of a second measurement target gas;
the optical fiber main body (3) is in a hollow cylindrical shape, a glass state light guide column (31) is arranged on the inner side of the optical fiber main body, a protective sleeve (32) is arranged on the outer side of the optical fiber main body, and the light receiving part (2) is arranged in the middle of the inner side of the glass state light guide column (31);
the light receiving part (2) comprises an oval carrier (21), an oxygen fluorescent sensitive film (22) and a carbon dioxide fluorescent sensitive film (23); the oxygen fluorescence sensitive film (22) and the carbon oxide fluorescence sensitive film (23) are attached to two surfaces of the oval carrier (21).
2. The optical fiber type CO2, O2 concentration rapid acquisition probe as claimed in claim 1, wherein the major axis of the elliptical carrier (21) is the same diameter as the glassy light guide pillar (31).
3. The optical fiber type CO2, O2 concentration rapid acquisition probe as claimed in claim 1, wherein the glassy light guide column (31) protrudes out of the optical fiber main body (3) and forms an included angle of 10-45 ° with the optical fiber main body (3).
4. The optical fiber type CO2, O2 concentration rapid acquisition probe as claimed in claim 1, further comprising a signal receiving device arranged in the middle of the elliptical carrier (21), wherein the signal receiving device converts optical signals into electrical signals.
5. The optical fiber type CO2, O2 concentration rapid acquisition probe as claimed in claim 3, wherein the laser wavelength emitted by the first light emitting element (11) and the second light emitting element (12) is 2-450 nm; strong absorption line 6359.97cm-1I.e. R16E, line intensity 1.744E23cm/mol and secondary line of weakness 6362.5cm-1I.e., R20E, line intensity was 1.623E23 cm/mol.
6. The optical fiber type CO2 and O2 concentration rapid acquisition probe as claimed in any one of claims 1 to 5, wherein the oxygen fluorescence sensitive membrane (22) and the carbon oxide fluorescence sensitive membrane (23) are both obtained by fixing fluorescence sensitive substances in certain inorganic or organic semi-permeable membrane materials by sol-gel technology.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010171238.6A CN111239092A (en) | 2020-03-12 | 2020-03-12 | Optical fiber type CO2、O2Concentration rapid acquisition probe |
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| CN202010171238.6A CN111239092A (en) | 2020-03-12 | 2020-03-12 | Optical fiber type CO2、O2Concentration rapid acquisition probe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112656399A (en) * | 2021-01-10 | 2021-04-16 | 复旦大学 | Sensing membrane for monitoring respiration in real time and preparation method thereof |
| CN114018320A (en) * | 2021-10-25 | 2022-02-08 | 复旦大学 | Wearable respiratory information monitor of little optic fibre |
-
2020
- 2020-03-12 CN CN202010171238.6A patent/CN111239092A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112656399A (en) * | 2021-01-10 | 2021-04-16 | 复旦大学 | Sensing membrane for monitoring respiration in real time and preparation method thereof |
| CN114018320A (en) * | 2021-10-25 | 2022-02-08 | 复旦大学 | Wearable respiratory information monitor of little optic fibre |
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