CN107796767A - A kind of oxygen mask and gas detecting system - Google Patents
A kind of oxygen mask and gas detecting system Download PDFInfo
- Publication number
- CN107796767A CN107796767A CN201711161124.8A CN201711161124A CN107796767A CN 107796767 A CN107796767 A CN 107796767A CN 201711161124 A CN201711161124 A CN 201711161124A CN 107796767 A CN107796767 A CN 107796767A
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- China
- Prior art keywords
- gas
- optical signal
- oxygen mask
- spectral
- controller
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/06—Respiratory or anaesthetic masks
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
Abstract
The invention discloses a kind of oxygen mask and gas detecting system, gas detection cell is provided with the inwall of the oxygen mask, gas detection cell includes：At least one fiber array, wherein, the surface of each fiber array is provided with detection zone, detection zone adheres to discolouration pigment, the color of discolouration pigment changes with the change of its ambient gas polarity, gas detection cell is used to receive light beam, and by remaining optical signal transmission to external spectral receiver, wherein, the remaining optical signal be light beam by the remaining optical signal of wavelength selectivity energy expenditure of evanscent field so that spectral receiver is analyzed and processed transfer spectral information corresponding to optical signal to controller.Oxygen mask and gas detecting system provided by the invention, at least one fiber array of discolouration pigment is adhered to by being set on the inwall of oxygen mask, it is more convenient so as to realize the detection of the species and its concentration of the polar gas to detected person's exhalation.
Description
Technical field
The present invention relates to technical field of medical instruments, more particularly to a kind of oxygen mask and gas detecting system.
Background technology
The oxygen that human body respiration needs can be transferred to human lung by oxygen mask from storage tank.Be mainly used in medical treatment and
Aviation, played an important role safely for treatment disease, protection passenger and pilot.But existing oxygen mask is only
Only there is the function that oxygen is provided for human body.
The content of the invention
The invention provides a kind of oxygen mask and gas detecting system, is adhered to by being set on the inwall of oxygen mask
At least one fiber array of discolouration pigment, examined so as to the species and its concentration of the polar gas to detected person's exhalation
Survey, to solve the problems, such as that oxygen mask function is single in the prior art.
The embodiments of the invention provide a kind of oxygen mask, it is single that gas detection is provided with the inwall of the oxygen mask
Member, wherein,
The gas detection cell includes：At least one fiber array, wherein, the surface of each fiber array is set
Have a detection zone, the detection zone adheres to discolouration pigment, the color of the discolouration pigment with the polarity of its ambient gas change
Change and change；
The gas detection cell is used to receive light beam, and by remaining optical signal transmission to external spectral receiver, its
In, the remaining optical signal is wavelength selectivity energy expenditure remaining optical signal of the light beam by evanscent field, with toilet
Spectral receiver is stated to be analyzed and processed transfer spectral information to controller corresponding to the optical signal.
The beneficial effects of the invention are as follows：By setting at least one of attachment discolouration pigment on the inwall of oxygen mask
Fiber array, it is more convenient so as to realize the detection of the species and its concentration of the polar gas to detected person's exhalation.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, each fiber array is the multiple tapered fibers for being closely arranged into bar code, or is arranged into
Multiple sides polishing optical fiber of bar code.
It is using the above-mentioned further beneficial effect of scheme：Attribute based on tapered fiber and side polishing optical fiber, can be with
Flexible relatively strong and volume very little carrier is made into be attached on the inwall of oxygen mask, and by adhering to discolouration thereon
Pigment, the species and its concentration of the convenient polar gas for detecting detected person's exhalation
Further, each side polishing optical fiber is formed by laser cutting or is made up of grinding.
It is using the above-mentioned further beneficial effect of scheme：By being cut by laser the side of optical fiber, obtained side can be made
Face polishing optical fiber more precisely meets demand.
Further, display screen is provided with the outer surface of the oxygen mask, for showing that the detection of detected person is believed
Breath.
The another technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of gas detecting system, including：Light
Source, spectral receiver, controller and the oxygen mask described in each embodiment as described above, wherein, the oxygen mask is placed on
At the mouth and nose of detected person so that the gas of detected person's exhalation is reached in the gas detection cell of the oxygen mask
Detection zone,
The light source launches light beam according to the control instruction of the controller of reception, and by optical signal transmission to the oxygen
Evanscent field is formed in the gas detection cell of gas mask；
The spectral receiver receives remaining optical signal, wherein, the remaining optical signal be the light beam by it is described suddenly
Die the remaining optical signal of wavelength selectivity energy expenditure of field, and by transfer spectral information corresponding to the remaining optical signal to institute
State controller；
The controller initial spectrum information and the spectral information received according to corresponding to the optical signal, and in advance
The spectral information and the species of gas and its corresponding relation of concentration deposited, determine the kind of the polar gas of detected person's exhalation
Class and its concentration.
The beneficial effects of the invention are as follows：Received by controller and initial spectrum information is gathered and through peroxide by spectral receiver
The spectral information of the gas detection cell of gas mask, and the spectral information and the species of gas that prestore in the controller and
The corresponding relation of its concentration, the species and its concentration of the polar gas of detected person's exhalation can be obtained, so that detecting
Journey is more convenient.
Further, the optical signal is transferred to the gas detection cell of the oxygen mask by the light source by optical fiber
On.
It is using the above-mentioned further beneficial effect of scheme：By selecting the light transmission fiber of high sensitivity, small volume to believe
Number, cost can be reduced, easily realizes volume production.
Further, the spectral receiver is spectral detector, then：
The light source launches monochromatic light light beam according to the control instruction of the controller of reception, and monochromatic optical signal is led to
Optical fiber is crossed to be transferred in the gas detection cell of the oxygen mask；
The controller then the initial spectrum intensity in the initial spectrum information and receive the spectral information
In spectral intensity, determine that spectral intensity is poor, and matched the spectral intensity is poor with the corresponding relation, to determine
State the species and its concentration of the polar gas of detected person's exhalation.
Further, the spectral receiver is spectroanalysis instrument, then：
The light source launches complex light light beam according to the control instruction of the controller of reception, and wide general optical signal is led to
Optical fiber is crossed to be transferred in the gas detection cell of the oxygen mask；
First wave length corresponding to initial spectrum intensity extrema of the controller in the initial spectrum information, and connect
Second wave length corresponding to spectral intensity extreme value in the spectral information received, determines wavelength shift, and the wavelength is inclined
Shifting amount is matched with the corresponding relation, to determine the species and its concentration of the polar gas of detected person's exhalation.
Further, the controller sends the control instruction to the light source in a pulsed fashion.
It is using the above-mentioned further beneficial effect of scheme：Improve and control instruction is sent to light source using pulse mode, from
And reach the purpose of power and energy saving.
Further, the gas detecting system also includes：Display device, the display device receive the controller hair
The testing result sent and display, the testing result include the species and its concentration of the polar gas of detected person exhalation.
It is using the above-mentioned further beneficial effect of scheme：Testing result is shown by display device, can preferably be supervised
Control the state of an illness of detected person.
Further, the display device includes：Be arranged on the oxygen mask outer surface display screen and/or with it is described
Controller establishes the remote monitoring terminal of communication connection.
The advantages of aspect that the present invention adds, will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by present invention practice.
Brief description of the drawings
Fig. 1 is a kind of schematic block diagram of gas detecting system provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic block diagram for gas detecting system that another embodiment of the present invention provides.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, the present invention is made below in conjunction with accompanying drawing into
One step it is described in detail, it is clear that the described embodiment only a part of embodiment of the present invention, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
All other embodiment, belongs to the scope of protection of the invention.
A kind of oxygen mask is provided in one embodiment of the invention, and gas is provided with the inwall of the oxygen mask
Detection unit.Gas detection cell includes：At least one fiber array, wherein, the surface of each fiber array is provided with detection
Area, detection zone attachment discolouration pigment, the color of discolouration pigment change with the change of the polarity of its ambient gas.Gas is examined
Unit is surveyed to be used to receive light beam, and by remaining optical signal transmission to external spectral receiver, wherein, remaining optical signal is light beam
By the remaining optical signal of wavelength selectivity energy expenditure of evanscent field, so that spectral receiver believes spectrum corresponding to optical signal
Breath, which is transmitted to controller, to be analyzed and processed.
Oxygen mask in above-described embodiment, by setting attachment discolouration pigment on the inwall of oxygen mask at least
One fiber array, so as to realize the detection of the species and its concentration of the polar gas to detected person's exhalation, due to that will be used for
The fiber array for detecting the attachment discolouration pigment of polar gas is combined with existing oxygen mask, so as to the state of an illness to sufferer
Progress intuitively monitors in real time.
Specifically, in this embodiment, each fiber array is the multiple tapered fibers for being closely arranged into bar code, or
Person, each fiber array are the multiple sides polishing optical fiber for being arranged into bar code.Each side polishing optical fiber passes through laser cutting
Form or be made up of grinding, the embodiment of the present invention is not limited in any way to this.
Attribute based on tapered fiber and side polishing optical fiber, flexible relatively strong and volume very little load can be made into
Body is attached on the inwall of oxygen mask, and by adhering to discolouration pigment, the convenient polarity for detecting detected person's exhalation thereon
The species and its concentration of gas.
It should be noted that in this embodiment, the diameter of each tapered fiber can be micron dimension, or nanometer amount
Level, the embodiment of the present invention are not limited in any way to this.In addition, discolouration pigment can be the pole with color with its ambient gas
The change of property and the material of attribute changed.
It should be understood that in this embodiment, optical fiber used in each side polishing optical fiber is single-mode fiber, then each side polishing
A part of single-mode fiber covering of optical fiber is buffed off, and is attached with discolouration pigment thereon, incident light from single-mode optics fibre core one
End-fire enters, and is exported from the other end of single-mode optics fibre core.Light through being polished part lower section when can because discolouration Pigment Film,
Single-mode fiber covering and the difference of the refractive index of single-mode optics fibre core, and produce the change of evanscent field.In some wave-length coverages
Light produces resonance with the evanscent field and spilt from part is polished, and is shown as in the result measured by output end in the wave-length coverage
The energy of light can be greatly lowered.Therefore, reflecting when discolouration Pigment Film is influenceed by VOC
Rate change can react the change for resonant wavelength, and the reaction of different discolouration pigments is different, thus measures result.
Alternatively, in one embodiment, it can be provided for showing the inspection of detected person on the outer surface of oxygen mask
The display screen of measurement information.Such as：Show the body temperature of detected person, the species of the polar gas breathed out and its concentration etc., Ke Yifang
Just check.Wherein, display screen can be liquid crystal or touching display screen, and the embodiment of the present invention is not limited in any way to this.
With reference to the schematic block diagram shown in Fig. 1 and Fig. 2, a kind of gas provided in an embodiment of the present invention is detected
System is described in detail.
As shown in figure 1, the gas detecting system 10 includes：Light source 1, spectral receiver 2, controller 3 and implement as described above
Oxygen mask 4 in example.
Wherein, oxygen mask 4 is placed at the mouth and nose of detected person so that the gas of detected person's exhalation reaches oxygen face
Detection zone in the gas detection cell 5 of cover 4.Light source 1 launches light beam according to the control instruction of the controller 3 of reception, and by light
Signal is transferred in the gas detection cell 5 of oxygen mask 4 and forms evanscent field.
Spectral receiver 2 receives remaining optical signal, wherein, remaining optical signal is that light beam is selected by the wavelength of above-mentioned evanscent field
The remaining optical signal of selecting property energy expenditure, and by transfer spectral information corresponding to remaining optical signal to controller 3.Controller 3
According to initial spectrum information corresponding to optical signal and the spectral information received, and the spectral information and the species of gas that prestore and its
The corresponding relation of concentration, determine the species and its concentration of the polar gas of detected person's exhalation.
Gas detecting system in above-described embodiment, received by controller and initial spectrum information is gathered by spectral receiver
With the spectral information of the gas detection cell by oxygen mask, and the spectral information and gas prestored in the controller
Species and its concentration corresponding relation, can obtain detected person exhalation polar gas species and its concentration so that
It is more convenient to obtain detection process.
Specifically, in this embodiment, the gas that optical signal is transferred to oxygen mask 4 by light source 1 by optical fiber detects list
In member 5.By selecting the optical signal transmission fiber of high sensitivity, small volume, cost can be reduced so that the operation of detecting system
Simply, volume production is easily realized.
In addition, in this embodiment, controller 3 can send control instruction to light source in a pulsed fashion, so as to reach province
The purpose of electricity energy-conservation.
Alternatively, in another embodiment, spectral receiver 2 is spectral detector, then：Light source 1 is according to the control of reception
The control instruction of device 3 processed launches monochromatic light light beam, and monochromatic optical signal is transferred to the gas detection of oxygen mask 4 by optical fiber
On unit 5.Then the initial spectrum intensity in initial spectrum information and the spectrum in the spectral information received are strong for controller 3
Degree, determines that spectral intensity is poor, and spectral intensity difference is matched with corresponding relation, to determine the polarity gas of detected person's exhalation
The species and its concentration of body.
Specifically, in this embodiment, the gas detection cell 5 of oxygen mask 4 includes at least one fiber array, and often
The surface of individual fiber array is provided with detection zone, detection zone attachment discolouration pigment.And each fiber array is closely to be arranged into
Multiple tapered fibers of bar code, or, each fiber array is the multiple sides polishing optical fiber for being arranged into bar code.
Each tapered fiber or each side polishing optical fiber can correspond to a kind of discolouration pigment of color, then multiple
Tapered fiber or multiple sides polishing optical fiber correspond to the discolouration pigment of multiple color.That is, in gas detection cell 5
Detection zone can adhere to a kind of discolouration pigment, can also adhere to a variety of discolouration pigments.
Preferential, the discolouration pigment of each color can correspond at least three tapered fibers or at least last side is beaten
Polishing is fine,, can be by multiple spectrum of the monochromatic optical signal of collection for the discolouration pigment of a certain color during detection
Deviate too big removal with other spectral intensities in intensity, using the average value of remaining spectral intensity as final measurement knot
Fruit, to ensure that the testing result that finally obtains is more accurate, so as to improve the stability of the detecting system and accuracy of detection.
Alternatively, in another embodiment, spectral receiver 2 is spectroanalysis instrument, then：Light source 1 is according to the control of reception
The control instruction of device 3 processed launches complex light light beam, and wide general optical signal is transferred to the gas detection of oxygen mask 4 by optical fiber
On unit 5.First wave length corresponding to initial spectrum intensity extrema of the controller 3 in initial spectrum information, and the light received
Second wave length corresponding to spectral intensity extreme value in spectrum information, determines wavelength shift, and by wavelength shift and corresponding relation
Matched, to determine the species and its concentration of the polar gas of detected person's exhalation.
That is, the gas detecting system in the embodiment of the present invention, can use spectral detector collection spectral information,
Spectroanalysis instrument collection spectral information, the type and the phase of spectra collection instrument of the light that corresponding light source is sent can also be used
Match somebody with somebody.Controller can be both matched to determine that detected person exhales based on the spectral intensity of monochromatic optical signal with corresponding relation
The species and its concentration of the polar gas gone out, can also wavelength shift corresponding to the spectral intensity extreme value based on wide general optical signal
Matched with corresponding relation to determine the species and its concentration of the polar gas of detected person's exhalation.Can compatible different light
Acquisition instrument is composed, system building cost is low, is easy to promote.
It should be understood that in this embodiment, the discolouration pigment of same color can correspond to the various concentrations of same gas.
The corresponding relation of polar gas and wavelength shift has been prestored, or, the corresponding relation with spectral intensity difference.When detected
When the species of the polar gas of people's exhalation is a variety of, the analysis of main elements analysis testing result can be utilized, so as to calculate mixing
The species and concentration of gas.
Alternatively, in another embodiment, as shown in Fig. 2 gas detecting system 10 can also include：Display device 6.
Display device 6 receives the testing result that controller 3 is sent and display, testing result include：The polar gas of detected person's exhalation
Species and its concentration.
Gas detecting system in above-described embodiment, testing result is shown by display device, can preferably monitor quilt
The state of an illness of tester.
Specifically, in this embodiment, display device 6 can include：It is arranged on the display screen of the outer surface of oxygen mask 4
And/or the remote monitoring terminal of communication connection is established with controller 3.
Gas detecting system in above-described embodiment, can be with by the way that display device to be arranged on to the outer surface of oxygen mask
Facilitate the attending family of detected person and the voluntary personnel that make the rounds of the wards understand the state of an illness of detected person；Shown by remote monitoring terminal
Testing result, carry out remote monitoring that can be to detected person, prevent detected person at one's side nobody when, occur dangerous.
In addition, the terms "and/or", only a kind of incidence relation for describing affiliated partner, represents there may be
Three kinds of relations, for example, A and/or B, can be represented：Individualism A, while A and B be present, these three situations of individualism B.Separately
Outside, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
Professional should further appreciate that, each example described with reference to the embodiments described herein
Unit and algorithm steps, it can be realized with electronic hardware, in the above description be generally described respectively according to function
The composition and step of example.Described function realized using distinct methods to each specific application, but this reality
Show the scope it is not considered that beyond the embodiment of the present invention.Specifically, the computing and control section can dredging collateral logic hardwares
Realize, it can be the logical integrated circuit manufactured using integrated circuit technology, and the present embodiment is not construed as limiting to this.
Above-described embodiment, the purpose, technical scheme and beneficial effect of the embodiment of the present invention are carried out
It is further described, should be understood that the embodiment that the foregoing is only the embodiment of the present invention, and do not have to
It is all within the spirit and principle of the embodiment of the present invention in the protection domain for limiting the embodiment of the present invention, any modification for being made,
Equivalent substitution, improvement etc., should be included within the protection domain of the embodiment of the present invention.
Claims (10)
- A kind of 1. oxygen mask, it is characterised in that gas detection cell is provided with the inwall of the oxygen mask, wherein,The gas detection cell includes：At least one fiber array, wherein, the surface of each fiber array is provided with inspection Area is surveyed, the detection zone adheres to discolouration pigment, and the color of the discolouration pigment becomes with the change of its ambient gas polarity Change；The gas detection cell is used to receive light beam, and by remaining optical signal transmission to external spectral receiver, wherein, institute It is wavelength selectivity energy expenditure remaining optical signal of the light beam by evanscent field to state remaining optical signal, so as to the spectrum Receiver is analyzed and processed transfer spectral information to controller corresponding to the optical signal.
- 2. oxygen mask according to claim 1, it is characterised in that each fiber array is in strip for close arrangement Multiple tapered fibers of code, or it is arranged into multiple sides polishing optical fiber of bar code.
- 3. oxygen mask according to claim 2, it is characterised in that each side polishing optical fiber passes through laser cutting Form or be made up of lapping mode.
- A kind of 4. gas detecting system, it is characterised in that including：Light source, spectral receiver, controller and such as claim 1-3 Any one of oxygen mask, wherein, the oxygen mask is placed at the mouth and nose of detected person so that it is described be detected The gas of people's exhalation reaches the detection zone in the gas detection cell of the oxygen mask,The light source launches light beam according to the control instruction of the controller of reception, and by optical signal transmission to the oxygen face Evanscent field is formed in the gas detection cell of cover；The spectral receiver receives remaining optical signal, wherein, the remaining optical signal is that the light beam passes through the evanscent field The remaining optical signal of wavelength selectivity energy expenditure, and by transfer spectral information corresponding to the remaining optical signal to the control Device processed；The controller initial spectrum information and the spectral information received according to corresponding to the optical signal, and prestore The corresponding relation of the species and its concentration of spectral information and gas, determine the polar gas of detected person exhalation species and Its concentration.
- 5. gas detecting system according to claim 4, it is characterised in that the optical signal is passed through optical fiber by the light source It is transferred in the gas detection cell of the oxygen mask.
- 6. gas detecting system according to claim 5, it is characterised in that the spectral receiver is spectral detector, Then：The light source launches monochromatic light light beam according to the control instruction of the controller of reception, and monochromatic optical signal is passed through into light Fibre is transferred in the gas detection cell of the oxygen mask；The controller is then in the initial spectrum intensity in the initial spectrum information and the spectral information received Spectral intensity, determine that spectral intensity is poor, and matched the spectral intensity is poor with the corresponding relation, to determine the quilt Detect the species and its concentration of the polar gas of people's exhalation.
- 7. gas detecting system according to claim 5, it is characterised in that the spectral receiver is spectroanalysis instrument, Then：The light source launches complex light light beam according to the control instruction of the controller of reception, and wide general optical signal is passed through into light Fibre is transferred in the gas detection cell of the oxygen mask；First wave length corresponding to initial spectrum intensity extrema of the controller in the initial spectrum information, and receive Second wave length corresponding to spectral intensity extreme value in the spectral information, determines wavelength shift, and by the wavelength shift Matched with the corresponding relation, to determine the species and its concentration of the polar gas of detected person's exhalation.
- 8. according to the gas detecting system any one of claim 4-7, it is characterised in that the controller is with pulse side Formula sends the control instruction to the light source.
- 9. according to the gas detecting system any one of claim 4-7, it is characterised in that the gas detecting system is also Including：Display device,The display device receives the testing result that the controller is sent and display, and the testing result includes described be detected The species and its concentration of the polar gas of people's exhalation.
- 10. gas detecting system according to claim 9, the display device includes：It is arranged on outside the oxygen mask The display screen on surface and/or the remote monitoring terminal that communication connection is established with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711161124.8A CN107796767A (en) | 2017-11-20 | 2017-11-20 | A kind of oxygen mask and gas detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711161124.8A CN107796767A (en) | 2017-11-20 | 2017-11-20 | A kind of oxygen mask and gas detecting system |
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| CN107796767A true CN107796767A (en) | 2018-03-13 |
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| CN103558162A (en) * | 2013-11-14 | 2014-02-05 | 北京航空航天大学 | Ultrahigh-flexibility volatile organic compound sensor based on side polishing optical fiber group |
| CN105987885A (en) * | 2016-01-06 | 2016-10-05 | 山东省科学院激光研究所 | Fiber grating-based quasi-distributed gas sensing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20110120034A (en) * | 2010-04-28 | 2011-11-03 | 경북대학교 산학협력단 | Volatile organic compounds gas sensing apparatus and volatile organic compounds gas sensing method using the same |
| US20130259749A1 (en) * | 2012-03-12 | 2013-10-03 | Respirion, LLC | Methods, devices, systems, and compositions for detecting gases |
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| CN103487402A (en) * | 2013-10-14 | 2014-01-01 | 北京信息科技大学 | Ring cavity inner-cavity optical fiber laser gas detection system with saturated absorption optical fibers |
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