CN207908362U - A kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology - Google Patents
A kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology Download PDFInfo
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- CN207908362U CN207908362U CN201721504053.2U CN201721504053U CN207908362U CN 207908362 U CN207908362 U CN 207908362U CN 201721504053 U CN201721504053 U CN 201721504053U CN 207908362 U CN207908362 U CN 207908362U
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Abstract
The utility model is related to a kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology, including laser light source, voltage-controlled decline swing chamber, full-automatic sampling system, photosignal detection module, digital sampling and processing and human-computer interaction module.When use, only collected gas need to be linked into instrument injection port, click the gas analysis button in instrument touch display screen, it can realize that full-automatic sample introduction, Data Management Analysis and the measurement result of gas are shown, while each module operating status inside human-computer interaction interface real-time monitoring instrument can be passed through.This instrument has many advantages, such as high sensitivity, easy to operate, efficient, real time on-line monitoring.
Description
Technical field
The utility model is related to a kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology, and in particular to
It is a kind of for trace gas concentration detection in breathe, using the full-automatic haldane-Henderson gas analysis apparatus of cavity ring down spectroscopy technology.
Background technology
Breast rail is a kind of volatile organic matter content by analysing respiratory gases to monitor health shape
The technological means of state is of great significance to the non-invasive diagnosis of great chronic disease, early screening and metabolism monitoring etc..At present
GC-MS is a general technology of trace gas analysis, although with high sensitivity and highly selective, detection process is multiple
It is miscellaneous, processing time is long, cannot be satisfied real-time online, the analysis of respiratory gas requirement without sample pre-treatments.Electrochemical sensor,
Its advantage is that it is small, it is at low cost, but such method sensitivity is relatively low, and frequent calibration is needed, it is easy to happen baseline drift
Shifting and spurious alarm.
And with the development of laser technology, (such as laser-induced fluorescence spectroscopy, swashs at Raman spectrum advanced laser spectrum tech
Optical absorption spectra), on-line analysis highly sensitive, highly selective with it the characteristics of, the research for gas analysis field provides
A kind of feasible methods and techniques means.The especially derivative side of highly sensitive cavity ring-down spectroscopy (CRDS) method and it
Method (chamber enhanced spectrum).With difference absorption spectrum (DOAS), tunable diode laser absorption spectroscopy (TDLAS), optoacoustic spectroscopy
(PAS) etc. traditional absorption spectrum detection method is compared, and cavity ring down spectroscopy technology (CRDS) technology is not by pulse laser fluctuation
Influence, have many advantages, such as that high sensitivity, signal-to-noise ratio be high, strong antijamming capability.
To sum up, develop a kind of high sensitivity, it is easy to operate, efficient, can real time on-line monitoring full-automatic breathing gas
Analyzer be very it is necessary to.
Utility model content
Technical problem to be solved in the utility model be develop a kind of high sensitivity, it is easy to operate, efficient, can be real
When the full-automatic haldane-Henderson gas analysis apparatus monitored on-line.For this purpose, the utility model proposes one kind being based on optical cavity ring-down light
The full-automatic haldane-Henderson gas analysis apparatus of spectral technology, including：Laser light source, voltage-controlled decline swing chamber, full-automatic sampling system, photosignal
Detection module, digital sampling and processing and human-computer interaction module.
Preferably, the full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology, which is characterized in that institute
It is laser pulse light source (1) to state laser light source, and the laser of corresponding wavelength can be selected according to the Fingerprint of gas with various ingredient
Light-pulse generator.
Preferably, the pressure decline swing chamber be special sealing vacuum cavity (2), cavity be equipped with air inlet, gas outlet and
Pressure monitoring mouth, wherein air inlet and outlet end mouth are controlled by solenoid valve (7) (8) respectively, and pressure is connected at pressure monitoring mouth and is passed
Sensor (9) carries out inside cavity pressure monitoring.
Preferably, the full-automatic sampling system by automatic control circuit (3) carries out the pressure detecting of cavity and into outlet
Control.Preferably, the photosignal detection module detects the emergent light of vacuum cavity by photomultiplier (4).
Preferably, the data acquisition module acquires the micro- of photomultiplier (4) output by high-speed data acquisition card (5)
Weak high-frequency current signal, and pass to mating PC104 mainboards and carry out Data Management Analysis, by being swung at the analysis of waveform to declining
Reason further calculates out corresponding gas composition concentration to calculate the ring-down time under corresponding states.
Preferably, the human-computer interaction module is collectively constituted by TFT touch display screens (6) and PC104 mainboards, and TFT is touched
Display screen can show that PC104 mainboards transmit the gas concentration data results to come up, and the fortune of each module in monitoring instrument inside
Row state.
Through the above technical solutions, a kind of full-automatic analysis of respiratory gas based on cavity ring down spectroscopy technology can be developed
Instrument has many advantages, such as high sensitivity, easy to operate, efficient, real time on-line monitoring.
Description of the drawings
Can be more clearly understood the feature and advantage of the utility model by reference to attached drawing, attached drawing be schematically without
It is interpreted as carrying out any restrictions to the utility model, in the accompanying drawings：
Fig. 1 shows the structural schematic diagram for giving the utility model；
Specific implementation mode
In order to be more clearly understood that the above objects, features, and advantages of the utility model, below in conjunction with the accompanying drawings and have
The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen
The feature in embodiment and embodiment please can be combined with each other.
Many details are elaborated in the following description in order to fully understand the utility model, still, this practicality
Novel to be implemented different from other modes described here using other, therefore, the scope of protection of the utility model is simultaneously
It is not limited by following public specific embodiment.
As shown in Figure 1, the full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology, including：Laser light source, pressure
Control, which declines, swings chamber, full-automatic sampling system, photosignal detection module, digital sampling and processing and human-computer interaction module.
Preferably, the laser light source is laser pulse light source (1), can be selected according to the Fingerprint of gas with various ingredient
Select the laser pulse light source of corresponding wavelength.
Preferably, the pressure decline swing chamber be special sealing vacuum cavity (2), cavity be equipped with air inlet, gas outlet and
Pressure monitoring mouth, wherein air inlet and outlet end mouth are controlled by solenoid valve (7) (8) respectively, and pressure is connected at pressure monitoring mouth and is passed
Sensor (9) carries out inside cavity pressure monitoring.
Preferably, the full-automatic sampling system by automatic control circuit (3) carries out the pressure detecting of cavity and into outlet
Control.Preferably, the photosignal detection module detects the emergent light of vacuum cavity by photomultiplier (4).
Preferably, the data acquisition module acquires the micro- of photomultiplier (4) output by high-speed data acquisition card (5)
Weak high-frequency current signal, and pass to mating PC104 mainboards and carry out Data Management Analysis, by being swung at the analysis of waveform to declining
Reason further calculates out corresponding gas composition concentration to calculate the ring-down time under corresponding states.
Preferably, the human-computer interaction module is collectively constituted by TFT touch display screens (6) and PC104 mainboards, and TFT is touched
Display screen can show that PC104 mainboards transmit the gas concentration data results to come up, and the fortune of each module in monitoring instrument inside
Row state.
For the first time in use, the background first clicked on TFT touch display screens (6) measures button after system boot, system at this time
It is drawn air into automatic in sealing vacuum cavity (2), the emergent light of vacuum cavity is detected by photomultiplier (4), high speed
Data collecting card (5) acquires the faint high-frequency current signal that photomultiplier (4) exports, and passes to mating PC104 mainboards
Data Management Analysis is carried out, by swinging the analyzing processing of waveform to declining to calculate the ring-down time of background air.Then will
Breathing gas to be detected is linked into the air inlet of sealing vacuum cavity (4), clicks the tidal air in TFT touch display screens (6)
Bulk measurement button, instrument will calculate the ring-down time of this sample automatically, and by the way that corresponding breathing gas ingredient is calculated
Result is shown on screen by concentration.Entire analytic process will terminate in 1 minute, high sensitivity, easy to operate, efficiency
It is high.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology, which is characterized in that including：Laser light
Source, voltage-controlled decline swing chamber, full-automatic sampling system, photosignal detection module, digital sampling and processing and human-computer interaction module.
2. the full-automatic haldane-Henderson gas analysis apparatus according to claim 1 based on cavity ring down spectroscopy technology, feature exist
In the laser light source is laser pulse light source (1), can select corresponding wavelength according to the Fingerprint of gas with various ingredient
Laser pulse light source；Voltage-controlled decline swings chamber for special sealing vacuum cavity (2), and cavity is equipped with air inlet, gas outlet and pressure
Power monitors mouth, and wherein air inlet and outlet end mouth is controlled by solenoid valve (7) (8) respectively, and pressure sensing is connected at pressure monitoring mouth
Device (9) carries out inside cavity pressure monitoring；The pressure that the full-automatic sampling system is carried out cavity by automatic control circuit (3) is examined
Survey and pass in and out gas control system.
3. the full-automatic haldane-Henderson gas analysis apparatus according to claim 1 or 2 based on cavity ring down spectroscopy technology, feature
It is, the photosignal detection module detects the emergent light of vacuum cavity by photomultiplier (4)；The data acquisition module
Block is acquired the faint high-frequency current signal of photomultiplier (4) output by high-speed data acquisition card (5), and is passed to mating
PC104 mainboards carry out Data Management Analysis, by swinging the analyzing processing of waveform to declining and being swung to calculate declining under corresponding states
Time further calculates out corresponding gas composition concentration；The human-computer interaction module is by TFT touch display screens (6) and PC104 master
Plate collectively constitutes, and TFT touch display screens can show that PC104 mainboards transmit the gas concentration data results to come up, and monitor
The operating status of each module of instrument internal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721504053.2U CN207908362U (en) | 2017-11-13 | 2017-11-13 | A kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721504053.2U CN207908362U (en) | 2017-11-13 | 2017-11-13 | A kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology |
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| CN207908362U true CN207908362U (en) | 2018-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655855A (en) * | 2017-11-13 | 2018-02-02 | 中国医学科学院生物医学工程研究所 | A kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology |
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2017
- 2017-11-13 CN CN201721504053.2U patent/CN207908362U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655855A (en) * | 2017-11-13 | 2018-02-02 | 中国医学科学院生物医学工程研究所 | A kind of full-automatic haldane-Henderson gas analysis apparatus based on cavity ring down spectroscopy technology |
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