CN108732176A - A kind of medical respiration carbon dioxide detecting system - Google Patents
A kind of medical respiration carbon dioxide detecting system Download PDFInfo
- Publication number
- CN108732176A CN108732176A CN201810711989.5A CN201810711989A CN108732176A CN 108732176 A CN108732176 A CN 108732176A CN 201810711989 A CN201810711989 A CN 201810711989A CN 108732176 A CN108732176 A CN 108732176A
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- gas
- measurement
- window
- wheel disc
- carbon dioxide
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 52
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 48
- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 76
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000005538 encapsulation Methods 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 3
- 230000000747 cardiac effect Effects 0.000 claims description 2
- 238000012937 correction Methods 0.000 abstract description 4
- 238000013508 migration Methods 0.000 abstract description 2
- 230000005012 migration Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 73
- 229960004424 carbon dioxide Drugs 0.000 description 45
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- VLCQZHSMCYCDJL-UHFFFAOYSA-N tribenuron methyl Chemical compound COC(=O)C1=CC=CC=C1S(=O)(=O)NC(=O)N(C)C1=NC(C)=NC(OC)=N1 VLCQZHSMCYCDJL-UHFFFAOYSA-N 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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
- G01N21/84—Systems specially adapted for particular applications
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
A kind of medical respiration carbon dioxide detecting system, including light source and gas chamber, gas chamber are used for through under test gas, and light source further includes copped wave wheel disc, motor, detector and processor for being radiated on gas chamber to form light path；Copped wave wheel disc is equipped with multiple measurement windows, the calibrating gas of one of measurement window encapsulation known concentration, motor is for driving the copped wave wheel disc, copped wave wheel disc is arranged in light path, monochromatic light road is divided into multiple Measurement channels, detector is used to obtain the signal on Measurement channel, and sends a signal to processor and handled, and processor is additionally operable to control light source.The application need to only use a detector due to multiple Measurement channels, cost is saved, when the application carries out zero correction, it can be carried out according to the calibrating gas of the known concentration, without introducing extraneous air zero correction is carried out as zero reference point, influence of the zero migration to measurement caused by external zero reference gas is avoided, realizes without school Z-operation function, improves the stability of measurement.
Description
Technical field
This application involves medical field more particularly to a kind of medical respiration carbon dioxide detecting systems.
Background technology
Medical respiration carbon dioxide monitoring be modern clinic operation in, one of the key parameter in Intensive Care Therapy, Ke Yiying
For multi-parameter breathing gas patient monitor, lung ventilator, in Anesthesia machine and the special patient monitor of breathing gas, the wherein medical respiration heart two
Carbonoxide monitoring technology is key core technology therein, and the medical respiration carbon dioxide in above system is applied to measure at present
Technology is typically the technology using Infrared spectra adsorption, there is the realization method of by-pass flow and mainstream, is required for carrying out zero reference of input
School Z-operation could realize accurate measurement.
Current common medical carbon dioxide gas measurement system, as shown in Figure 1, including light source 11, gas chamber 12 and detector
13, it waits and surveys gas from the input of the arrival end of gas chamber 12 and exported from the output end of gas chamber 12, light source 11 is for being radiated at gas chamber 12
On to form light path and reference path to be measured, detector 13 has two-way, for obtaining the signal in light path, and sends a signal to
Processor (not shown) is handled.
Two detectors two signal amplification channels of composition of the needs of medical respiration carbon dioxide detection at present, twice of generation
Cost, and twin-channel otherness can also increase measurement error, the school Z-operation of timing be needed, using inconvenience.
Invention content
The application technical problems to be solved are in view of the deficiencies of the prior art, to provide a kind of medical respiration carbon dioxide inspection
Examining system.
The application technical problems to be solved are solved by the following technical programs：
A kind of medical respiration carbon dioxide detecting system, including light source and gas chamber, the gas chamber are used for through under test gas,
The light source further includes copped wave wheel disc, motor, detector and processor for being radiated on the gas chamber to form light path；Institute
It states copped wave wheel disc and is equipped with multiple measurement windows, the calibrating gas of one of measurement window encapsulation known concentration, the motor is used
In driving the copped wave wheel disc, the copped wave wheel disc to be arranged in the light path, monochromatic light road is divided into multiple Measurement channels, it is described
Detector is used to obtain the signal on Measurement channel, and sends a signal to the processor and handled, and the processor is also
For controlling light source.
The measurement window includes three, and the monochromatic light road is divided under test gas light path, gas to be measured by three measurement windows
Body+carbon dioxide calibrating gas light path and reference path.
The measurement window includes the through-hole and transparency cover being arranged on the copped wave wheel disc, and the transparency cover is arranged in institute
State through-hole both ends.
The measurement window includes the main measurement window being arranged in the under test gas light path, is arranged in the reference light
The reference measure window of road and the subsidiary window being arranged in the under test gas+standard carbon dioxide gas light path,
The calibrating gas of encapsulation known concentration in the subsidiary window.
Air is encapsulated in the main measurement window and the reference measure window, and standard is encapsulated in the subsidiary window
Carbon dioxide gas.
The both ends of the main measurement window be equipped with centre wavelength be 4.26 microns of optical filters, the two of the subsidiary window
It is 4.26 microns of optical filters that end, which is equipped with centre wavelength, and it is 3.7 microns of filters that the both ends of the reference measure window, which are equipped with centre wavelength,
Mating plate.
The measuring chamber is cylindrical.
Further include amplification and filter circuit, analog to digital conversion circuit, the signal that the detector obtains is put described in process successively
Greatly be sent to the processor after filter circuit and analog-digital conversion circuit as described.
As a result of above technical scheme, the advantageous effect that the application has is made to be：
In the specific implementation mode of the application, due to being arranged multiple measurement windows on copped wave wheel disc, and wherein one
Single channel light path is divided into multiple measure by multiple measurement windows and led to by the calibrating gas that known concentration is sealed in a measurement window
Road, and multiple Measurement channels need to only use a detector, having saved cost can be according to this when the application carries out zero correction
The calibrating gas of known concentration carries out, and carries out zero correction as zero reference point without introducing extraneous air, avoids outer
Influence of the zero migration to measurement, improves the stability of measurement caused by zero reference gas of portion.
Description of the drawings
Fig. 1 is medical carbon dioxide gas detecting system structural schematic diagram；
Fig. 2 is the structural schematic diagram of the system of the application in one embodiment；
Fig. 3 is the structural schematic diagram of the system of the application in another embodiment；
Fig. 4 is the flow chart of the embodiment of the present application two.
Specific implementation mode
The application is described in further detail below by specific implementation mode combination attached drawing.
Embodiment one：
The application is carried for providing a kind of medical respiration carbon dioxide detecting system for the measurement of medical respiration carbon dioxide
For hardware supported.Corresponding software is installed in the system of the application, you can the carbon dioxide generated to breathing measures.
As shown in Figure 2 and Figure 3, a kind of medical respiration carbon dioxide detecting system, including light source 10, gas chamber 20, copped wave wheel disc
30, motor (not shown), detector 40, processor 50 and light source driving circuit 60, gas chamber 20 are used for through under test gas, light source
10 for being radiated on gas chamber 20 to form light path, and motor is for driving copped wave wheel disc 30, copped wave wheel disc 30 to be equipped with multiple measurements
Window, copped wave wheel disc 30 are arranged in light path, monochromatic light road are divided into multiple Measurement channels, detector 40 has multiple, each detection
Device 40 coordinates with Measurement channel respectively, for obtaining the signal on Measurement channel, and send a signal to processor 50 into
Row processing, processor 50 can be additionally used in by controlling light source 10, and in one embodiment, processor 50 can also be driven by light source
Dynamic circuit 60 controls light source 10.Copped wave wheel disc 30 can be various shapes, and in the present embodiment, copped wave wheel disc 30 is disk
Shape.Processor 50 may include microprocessor, microcontroller etc..
In one embodiment, measurement window includes three, and monochromatic light road is divided under test gas light by three measurement windows
Road, under test gas+carbon dioxide calibrating gas light path and reference path.Measurement window may include being arranged on copped wave wheel disc 30
Through-hole and transparency cover, transparency cover be arranged at through-hole both ends.Measuring chamber may be various shapes, such as cylindrical, cylinder,
In the present embodiment, measuring chamber is cylindrical, and measurement window is the hollow cylinder being arranged on copped wave wheel disc 30
And at both ends, setting transparency cover forms respectively, to ensure the symmetry of light path, transparency cover can be selected transparent cameo glass or other
Transparent material.
Further, measurement window further includes main measurement window 31, reference measure window 32 and subsidiary window 33.It is main
Measurement window 31 is arranged under test gas light path, and reference measure window 32 is arranged in reference path, subsidiary window 33
It is arranged under test gas+standard carbon dioxide gas light path, the calibrating gas of encapsulation known concentration in subsidiary window 33.
In one embodiment, air is encapsulated in main measurement window 31 and reference measure window 32 respectively, in subsidiary window 33
Encapsulation standard carbon dioxide gas.
In one embodiment, it is 4.26 microns of optical filters, auxiliary that the both ends of main measurement window 31, which are equipped with centre wavelength,
It is 4.26 microns of optical filters that the both ends of measurement window 32, which are equipped with centre wavelength, and the both ends of reference measure window are equipped with centre wavelength
3.7 microns of optical filters.
The system of the application can also include amplification and filter circuit 70, analog to digital conversion circuit 80, the letter that detector obtains
Number, successively processor 50 is sent to after filter circuit and analog to digital conversion circuit by amplifying.
In one embodiment, the system of the application can also include motor-drive circuit (not shown), processor 50
It is connect with motor by motor-drive circuit, the rotating speed for controlling motor.
Embodiment two：
Fig. 4 is the flow chart of medical respiration gas concentration lwevel acquisition methods provided by Embodiment 2 of the present invention, this implementation
The executive agent of example can be a functional unit in computer equipment or computer equipment, include the following steps：
Step 102：Three measurement windows are set on copped wave wheel disc, and sealing is known dense in a wherein measurement window
The carbon dioxide gas calibrating gas of degree.
On copped wave wheel disc be arranged three measurement windows, specifically can by copped wave wheel disc be arranged three through-holes, and
Transparency cover is arranged to realize in through-hole both ends.In one embodiment, it is contemplated that the consistency of light path, measurement window are setting
Hollow cylinder on copped wave wheel disc and setting transparency cover forms at both ends respectively, to ensure the symmetry of light path, and is protected
The light path for demonstrate,proving three tunnels is consistent, and transparent cameo glass or other transparent materials can be selected in transparency cover.
Step 104：The copped wave wheel disc is arranged in light path, single channel light path is divided into three by three measurement windows
A Measurement channel, Measurement channel include under test gas light path, under test gas+carbon dioxide calibrating gas light path and reference path.
In one embodiment, under test gas light path by be equipped with centre wavelength be 4.26 micro- the both ends of measurement window
Rice optical filter, under test gas+standard carbon dioxide gas light path by measurement window both ends be equipped with centre wavelength be 4.26
The optical filter of micron, standard carbon dioxide gas are sealed in the measurement window of under test gas+standard carbon dioxide gas light path,
Reference path by be equipped with centre wavelength be 3.7 microns of optical filter the both ends of measurement window.
Step 106：The carbon dioxide gas for inputting known concentration, is arranged the calibration point of predetermined quantity, according to carbon dioxide
Relationship between concentration and penetrating light intensity establishes carbon dioxide concentration value table.
Wherein, the relationship between gas concentration lwevel and penetrating light intensity, determines especially by following formula：
The standard carbon dioxide gas C of known concentration is substituted into formula (1) to obtain：
TCO in formula2Indicate density of carbon dioxide gas value under test gas light path, rCO2It indicates in reference path
Density of carbon dioxide gas value, (t+s) CO2Indicate under test gas+standard two under test gas+standard carbon dioxide gas light path
The gas concentration of carbon oxide gas；cCO2Indicate the concentration of the standard carbon dioxide gas of known concentration, the mark of the known concentration
Quasi- carbon dioxide gas is for calibrating, ItIndicate the transmitted light intensity of under test gas light path, IrIndicate the transmitted light intensity of reference path,
Ic+sIt is the transmitted light intensity of under test gas+standard carbon dioxide gas.
Step 106 may comprise steps of：
Step 1062：Multiple calibration points are set, and calibration point includes 0 value, maximum value and limited a calibration point；
Step 1064：The carbon dioxide gas for inputting known concentration is obtained from 0~Max CO2In sectionList, wherein k takes 1,2,3 ..., MaxN, the data between calibration point pass through secondary song
The method of line difference obtains.MaxCO2It can rule of thumb be configured.
Step 1066：Establish the table for calculating and searching final carbon dioxide values.
The application considers to measure in the scheme of wavelength and reference wavelength, choosing on the basis of based on infrared spectrometry
The device for increasing a mechanical chopperwheel disk on Measurement channel is selected, to realize single pass signal detection, in order to eliminate light
Decaying when after the consistency deficiency and prolonged application in source, sets that there are three measurement windows on this mechanical copped wave disk, passes through three
Single channel light path is divided into three Measurement channels by a measurement window, wherein three windows are respectively to be arranged under test gas light path
Main measurement window, the reference measure window that is arranged in reference path and it is newly-increased one under test gas+standard carbon dioxide
Known CO is encapsulated in gas light path2The subsidiary window of concentration is on the basis of the measurement window and measurement reference chamber of the prior art
On increase a known CO of encapsulation2The measurement window of concentration is used as referring to sample gas.
It is 4.26 microns of optical filters that the both ends of main measurement window, which are equipped with centre wavelength, during the both ends of subsidiary window are equipped with
The a length of 4.26 microns of optical filters of cardiac wave, it is 3.7 microns of optical filters that the both ends of reference measure window, which are equipped with centre wavelength,.Main measurement window
Air is encapsulated in mouth and reference measure window respectively, the CO2 gases of a certain concentration are full of in subsidiary window, with complete
Amplification at above-mentioned signal and subsequent processing, to obtain f (tCO2)∝It, f ((t+r) CO2)∝It+r, therefore,
It considers further that the uncertainty of rCO2 concentration values, carries out the calibration of calibrating gas in practice, that is, input dense known to one
The standard carbon dioxide gas C of degree, then have：
Wherein C can take in carbon dioxide measurement range, and include 0 value and maximum value, and its between limited calibration
Point, to obtain from 0-MaxCO2,List, wherein k takes 1,2,3 ..., MaxN, and school
Data between on schedule will be obtained by the method for conic section difference, and is established one and calculated and search final carbon dioxide values
Table, the final real-time measurement for realizing medical carbon dioxide concentration.
Step 108：Carbon dioxide concentration value table is inquired, and obtains the real-time survey of medical carbon dioxide concentration by calculating
Magnitude.
The foregoing is a further detailed description of the present application in conjunction with specific implementation manners, and it cannot be said that this Shen
Specific implementation please is confined to these explanations.For those of ordinary skill in the art to which this application belongs, it is not taking off
Under the premise of conceiving from the application, a number of simple deductions or replacements can also be made.
Claims (8)
1. a kind of medical respiration carbon dioxide detecting system, including light source and gas chamber, the gas chamber is used for through under test gas, institute
Light source is stated for being radiated on the gas chamber to form light path, which is characterized in that further include copped wave wheel disc, motor, detector and
Processor；The copped wave wheel disc is equipped with multiple measurement windows, the calibrating gas of one of measurement window encapsulation known concentration, institute
Motor is stated for driving the copped wave wheel disc, the copped wave wheel disc to be arranged in the light path, monochromatic light road is divided into multiple measurements
Channel, the detector is used to obtain the signal on Measurement channel, and sends a signal to the processor and handled, described
Processor is additionally operable to control light source.
2. the system as claimed in claim 1, which is characterized in that the measurement window includes three, and three measurement windows are by institute
It states monochromatic light road and is divided under test gas light path, under test gas+carbon dioxide calibrating gas light path and reference path.
3. system as claimed in claim 2, which is characterized in that the measurement window includes being arranged on the copped wave wheel disc
Through-hole and transparency cover, the transparency cover are arranged at the through-hole both ends.
4. system as claimed in claim 3, which is characterized in that the measurement window includes being arranged in the under test gas light path
On main measurement window, the reference measure window that is arranged in the reference path and be arranged in the under test gas+standard two
Subsidiary window in carbon oxide gas light path, the calibrating gas of the interior encapsulation known concentration of the subsidiary window.
5. system as claimed in claim 4, which is characterized in that encapsulated in the main measurement window and the reference measure window
Air encapsulates standard carbon dioxide gas in the subsidiary window.
6. the system as described in any one of claim 1 to 5, which is characterized in that during the both ends of the main measurement window are equipped with
The a length of 4.26 microns of optical filters of cardiac wave, it is 4.26 microns of optical filters, institute that the both ends of the subsidiary window, which are equipped with centre wavelength,
The both ends for stating reference measure window are equipped with centre wavelength as 3.7 microns of optical filters.
7. the system as described in any one of claim 1 to 5, which is characterized in that the measuring chamber is cylindrical.
8. the system as described in any one of claim 1 to 5, which is characterized in that further include that amplification turns with filter circuit, modulus
Change circuit, the signal that the detector obtains is sent out by the amplification and after filter circuit and analog-digital conversion circuit as described successively
Give the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711989.5A CN108732176A (en) | 2018-06-29 | 2018-06-29 | A kind of medical respiration carbon dioxide detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810711989.5A CN108732176A (en) | 2018-06-29 | 2018-06-29 | A kind of medical respiration carbon dioxide detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108732176A true CN108732176A (en) | 2018-11-02 |
Family
ID=63925768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810711989.5A Pending CN108732176A (en) | 2018-06-29 | 2018-06-29 | A kind of medical respiration carbon dioxide detecting system |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113509167A (en) * | 2020-04-10 | 2021-10-19 | 深圳市理邦精密仪器股份有限公司 | Calibration system, calibration method and measurement method based on gas monitoring module |
| CN117330533A (en) * | 2023-12-01 | 2024-01-02 | 广东省特种设备检测研究院顺德检测院 | Automatic-calibration intelligent carbon dioxide infrared gas analyzer and use method thereof |
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| CN113509167A (en) * | 2020-04-10 | 2021-10-19 | 深圳市理邦精密仪器股份有限公司 | Calibration system, calibration method and measurement method based on gas monitoring module |
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| CN117330533B (en) * | 2023-12-01 | 2024-02-27 | 广东省特种设备检测研究院顺德检测院 | Automatic-calibration intelligent carbon dioxide infrared gas analyzer and use method thereof |
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Application publication date: 20181102 |