CN106404694A - Device for dynamically monitoring concentration of components in smoke gas in cigarette smoking procedures - Google Patents
Device for dynamically monitoring concentration of components in smoke gas in cigarette smoking procedures Download PDFInfo
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- CN106404694A CN106404694A CN201610998074.8A CN201610998074A CN106404694A CN 106404694 A CN106404694 A CN 106404694A CN 201610998074 A CN201610998074 A CN 201610998074A CN 106404694 A CN106404694 A CN 106404694A
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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
- G01N21/17—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
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Abstract
The invention discloses a device for dynamically monitoring the concentration of components in smoke gas in cigarette smoking procedures. The device is characterized by comprising a smoking machine, a two-way valve of the smoking machine, a multi-reflection gas absorption cell, a filter disc, a three-way valve and a cigarette clamp holder; the smoking machine, the two-way valve of the smoking machine, the multi-reflection gas absorption cell, the filter disc, the three-way valve and the cigarette clamp holder are sequentially communicated with one another according to a smoke gas smoking flow direction, an optical fiber collimator, a laser device, a laser current controller and a laser temperature controller are connected with a light ray incidence end of the multi-reflection gas absorption cell, a photoelectric detector is connected with a light ray receiving end of the multi-reflection gas absorption cell, the laser current controller and the laser temperature controller are connected with a computer, the photoelectric detector is connected with the computer by a data acquisition card, and a vacuum pump is connected onto a gas channel between the two-way valve of the smoking machine and the multi-reflection gas absorption cell by a two-way valve. The device has the advantages that shortcomings of long time consumption of pretreatment procedures, tedious detection steps and incapability of accurately reflecting dynamic change of components in smoke gas in the prior art can be overcome by the aid of the device, and the device has important significance on deeply exploring cigarette combustion pyrolysis mechanisms and evaluating the real-time toxicity of the smoke gas.
Description
Technical field
The present invention relates to gas concentration detection apparatus, during specifically a kind of dynamic monitoring cigarette smoking, flue gas composition is dense
The device of degree.
Background technology
Cigarette, in aspiration procedure, in high temperature combustion zone, distillation cracking zone or low temperature cold coagulation zone, all comprises a series of multiple
Miscellaneous physics, chemical change.Cigarette smoke is a kind of aerosol of generation during cigarette burning, is that known composition is the most complicated
One of system.Wherein main flume is the flue gas passing through from the filter end of cigarette during suction, and its harmful components can direct effect
In human organ, the classification of harmful components is used to judge flue gas toxity together with content, and the burst size of related flue gas composition can
With for reacting cigarette fired state.But, cigarette smoke component and concentration, with the carrying out of aspiration procedure, are constantly in dynamic
Among the process of change.Cigarette burning state has close correlation with smoke chemistry again.Therefore, detection cigarette was aspirating
The real-time dynamic change of harmful smoke components in main flume in journey, to further investigation cigarette combustion and pyrolysis mechanism, assessment flue gas
Toxicity has very important significance.Design a kind of device of flue gas composition concentration in aspiration procedure for real time on-line monitoring very
It is necessary.
Content of the invention
Present invention mainly solves technical problem be, for sample pre-treatments in prior art take, detecting step is numerous
Trivial, and fail to accurately reflect the shortcoming of flue gas composition dynamic change, provide a kind of convenient, quick, move for characterizing flue gas composition
The device of state concentration.
The purpose of the present invention is achieved through the following technical solutions：
The device of flue gas composition concentration during a kind of dynamic monitoring cigarette smoking, is sequentially communicated by flue gas suction flow direction inclusion
Smoking machine, smoking machine two-way valve, multiple reflections gas absorption cell, filter disc, triple valve and cigarette holder, in multiple reflections gas
The light incidence end of absorption cell is connected with optical fiber collimator, laser instrument and laser current controller and laser temperature controller,
It is connected with photodetector at the light receiver end of multiple reflections gas absorption cell, described laser current controller, laser temperature
Controller is all connected with computer, and described photodetector is connected with computer by data collecting card, in smoking machine two
In gas circuit between port valve and multiple reflections gas absorption cell, vavuum pump is connected with by vavuum pump two-way valve.
Described smoking machine is orthoscopic smoking machine or rotating disc type smoking machine, and smoking machine can be single channel or multichannel.Described
The suction power source of smoking machine is stepper motor.
Described filter disc is polytetrafluoroethylene (PTFE)（PTFE）Film filter disc or cambridge filter.
Pass through collimator end flanges secured adjusted seat phase between described optical fiber collimator and multiple reflections gas absorption cell
Connect, this collimator end flange secured adjusted seat circumferencial direction is evenly equipped with three waist-shaped holes, multiple reflections gas absorption cell
Three screwed holes are accordingly machined with end face；Meanwhile, one end face of collimator end flange secured adjusted seat is designed to inclined-plane, and this is oblique
Face is used for an end face of multiple reflections gas absorption cell of fitting；Three screws are respectively charged into collimator end flange secured adjusted seat
Circumferentially in three uniform waist-shaped holes, make collimator end flange secured adjusted seat inclined-plane and multiple reflections GAS ABSORPTION simultaneously
Pond end face laminating, and pass through three mode connects for screws；When light is incident from optical fiber collimator center line, solid along collimator end flange
The center line determining centre bore in adjustment seat is propagated.Because the binding face of collimator end flange secured adjusted seat is an inclined-plane, if
Now adjust the screw on loose collimator end flange secured adjusted seat, angle certain for the rotation of collimator end flange secured adjusted seat
Degree, then incident ray will rotate corresponding angle on a less radian, meanwhile the incidence point of incident ray
Position also there occurs change.
Pass through a detector end flanges secured adjusted seat phase between described photodetector and multiple reflections gas absorption cell
Connect, this detector end flanges secured adjusted seat circumferencial direction is evenly equipped with three waist-shaped holes, multiple reflections gas absorption cell
Three screwed holes are accordingly machined with end face；Meanwhile, detector end flanges secured adjusted seat end face is designed to inclined-plane, this inclined-plane
An end face for multiple reflections gas absorption cell of fitting；Three screws are respectively charged into detector end flanges secured adjusted seat and exist
In three uniform waist-shaped holes on circumference, make detector end flanges secured adjusted seat inclined-plane and multiple reflections gas absorption cell simultaneously
End face is fitted, and passes through three mode connects for screws；When light outgoing from absorption cell, detect end flanges secured adjusted seat along accurate
The center line of upper centre bore is propagated, because the binding face of detector end flanges secured adjusted seat is an inclined-plane, if now adjusting pine
Screw on detector end flanges secured adjusted seat, rotates a certain angle detector end flanges secured adjusted seat, then outgoing
Light will rotate corresponding angle on a less radian, and meanwhile the position of the eye point of emergent ray also occurs
Change.
Above-mentioned collimator end flange secured adjusted seat is a difference in that with detector end flanges secured adjusted seat, collimater
The size hole of end flanges secured adjusted seat medium design is unthreaded hole, and photodetector end flanges secured adjusted bore is screw thread
Hole, because there being corresponding external screw thread on photodetector, screwed hole is used for connecting detector.
The model integrated form multiple reflections gas absorption cell of described multiple reflections gas absorption cell, it is by detector, light
Fine collimater and multiple reflections gas absorption cell become one.Optical fiber collimator, photodetector pass through accurate accordingly respectively
Straight device end flanges secured adjusted seat, photodetector end flanges secured adjusted seat and multiple reflections gas absorption cell are integrated into one
Body.
Multiple reflections gas absorption cell can be Maurice Herriott gas absorption cell and White pond one kind therein, and volume exists
Between 50-1000mL.
Described data collecting card, data collecting card is internally provided with lock-in amplifier, A/D converter.Amplified by signal,
The second harmonic absorption signal that two multiplied frequency harmonic demodulation obtain, then it is delivered to computer after analog-to-digital conversion, to complete to process
And display.
The working mechanism of this device and process are as follows：Smoking machine aspirates to cigarette, and cigarette mainstream flue gas are through filter disc mistake
Multiple reflections gas absorption cell is entered after filter.Meanwhile, the light beam after optical fiber collimator collimation is from multiple reflections gas absorption cell
Incidence hole is incident, in absorption cell after multiple reflections from light hole outgoing, and then be received by a photoelectric detector.Photodetector
Optical signal is converted into electric signal, electric signal sends into data collecting card, signal is amplified through lock-in amplifier, two frequency multiplication solutions
Enter computer after mediating reason, preamplifier amplification and digital-to-analogue conversion and carry out data processing and display.Dynamic suction has detected
Cheng Hou, by coordinating to control vavuum pump, two-way valve and triple valve, and using nitrogen to treating in multiple reflections gas absorption cell
Survey residual gas in gas and suction channel to be carried out.
Described laser control process and principle are as follows, and laser instrument is by laser current controller and laser temperature controller control
System.After temperature required for setting for the laser temperature controller, laser instrument produces the laser beam of specific wavelength.Laser current control
Device processed produces the sawtooth signal of tens of Hz, and sawtooth signal controls a slow sweep current, completes to specific centre wavelength
The scanning of under test gas absworption peak.The scope of scanning arranges different initial currents by controlling interface and termination electric current is controlled
System.Modulation signal generator produces tens of kHz sine wave signals and is modulated.
The method have the characteristics that：Integrated form multiple reflections gas absorption cell can save adjustment light path time, simultaneously by
Fixing in experimentation in light path, it is not easily susceptible to the interference of the factors such as mechanical oscillation, allow the output light that photodetector detects
Bundle is highly stable, is unlikely to lose accuracy and the comparativity of data real-time detection.This is particularly important to dynamic detection.Collimater
End flanges secured adjusted seat, photodetector end flanges secured adjusted seat can rotate in certain angle, carry out the fine setting of angle,
This makes more convenient in fine setting light path.Laser scanning scope is adjustable.By arranging different scan frequencies, it is possible to achieve Gao Shi
Between resolution ratio gas concentration detection, that is, can detect that cigarette has in in-situ analysis main flume in aspiration procedure
The changing condition of evil smoke components.Apparatus of the present invention are easy and simple to handle, and detecting step is simple, enables dynamic monitoring exactly, prison
The result surveyed has very important significance to further investigation cigarette combustion and pyrolysis mechanism, assessment flue gas toxity.
Brief description
Fig. 1 is flue gas composition concentration on-line measuring device schematic diagram in cigarette smoking；
In Fig. 1：1. stepper motor, 2. smoking machine, 3. vavuum pump two-way valve, 4. vavuum pump, 5. photodetector, 6. multiple reflections
Gas absorption cell, 7. computer, 8. laser current controller, 9. laser instrument, 10. temperature controller, 11. optical fiber, 12. optical fiber are accurate
Straight device, 13. triple valves, 14. cigarette holder, 15. cigarettes, 16. filter discs, 17. smoking machine two-way valves, 18. data collecting cards.
Fig. 2 is integrated absorption cell photodetector connection end schematic diagram,
In Fig. 2：19. ventholes, 20. photodetector end flanges secured adjusted seats, 20-1. screwed hole, 20-2. waist-shaped hole.
Fig. 3 is integrated absorption cell optical fiber collimator connection end schematic diagram,
In Fig. 3：21. air admission holes, 22. optical fiber collimator end flanges secured adjusted seats, 22-1. unthreaded hole, 22-2. waist-shaped hole.
Fig. 4 is for photodetector end flanges secured adjusted holder structure schematic diagram, and c, d, e are respectively its full sectional view, master
View and left view.
Fig. 5 is optical fiber collimator end flanges secured adjusted holder structure schematic diagram, and f, g, h are respectively its full sectional view, main view
Figure and left view.
Fig. 6 is second harmonic Tuning Principle figure.
Fig. 7 is TDLAS（Tunable Diode Laser Absorption Spectroscopy）Computer controls face
Board interface.
Fig. 8 is the dynamic detection curve of flue gas composition concentration during cigarette smoking.
Fig. 9 is the difference curves of the dynamic detection curve of flue gas composition concentration during cigarette smoking.
Specific embodiment
The present invention is described further below in conjunction with accompanying drawing：
As shown in Figure 1：The device of flue gas composition concentration during a kind of dynamic monitoring cigarette smoking, is included by flue gas suction flow direction
Smoking machine 2, smoking machine two-way valve 17, multiple reflections gas absorption cell 6, filter disc 16, triple valve 13 and the cigarette folder being sequentially communicated
Holder 14, is connected with optical fiber collimator 12, laser instrument 9 and laser electricity in the light incidence end of multiple reflections gas absorption cell 6
Stream controller 8 and laser temperature controller 10, are connected with photodetector at the light receiver end of multiple reflections gas absorption cell
5, described laser current controller 8, laser temperature controller 10 are all connected with computer 7, and described photodetector 5 passes through number
It is connected with computer 7 according to capture card 18, logical in the gas circuit between smoking machine two-way valve 17 and multiple reflections gas absorption cell 6
Cross two-way valve 3 and be connected with vavuum pump 4.
In the present invention, pass through an optical fiber collimator flange between optical fiber collimator 12 and multiple reflections gas absorption cell 6
Secured adjusted seat 22 is connected, and passes through a photodetector flange solid between photodetector 5 and multiple reflections gas absorption cell 6
Determine adjustment seat 20 to be connected, on optical fiber collimator flange secured adjusted seat 22 and photodetector flange secured adjusted seat 20 all
It is symmetrily processed with three arcuation waist-shaped holes, to increase rotational angle when ring flange is installed.Collimator end flange secured adjusted seat
22 are circumferentially evenly equipped with three waist-shaped hole 22-2, and multiple reflections gas absorption cell end face is machined with three screw threads accordingly
Hole, simultaneously collimator end flange secured adjusted seat one end be designed to inclined-plane, this inclined-plane is used for multiple reflections gas absorption cell of fitting
An end face.Three screws are respectively charged into collimator end flange secured adjusted seat circumferentially in three uniform waist-shaped holes,
So that collimator end flange secured adjusted seat inclined-plane is fitted with multiple reflections gas absorption cell end face simultaneously, now fasten three screws
Connection with two end faces.Light is incident from optical fiber collimator center line, along collimator end flange secured adjusted Zuo Shang center
The center line in hole is propagated.Because the binding face of collimator end flange secured adjusted seat is an inclined-plane, if now adjusting loose collimater
Screw on end flanges secured adjusted seat, rotates a certain angle collimator end flange secured adjusted seat, then incident ray is just
Corresponding angle can be rotated on a less radian, meanwhile the position of the incidence point of incident ray also there occurs change
Change.Photodetector end flanges secured adjusted seat is different from collimator end flange secured adjusted seat removing one, and other details are complete
Exactly the same.It is a difference in that, the size hole of collimator end flange secured adjusted seat 22 medium design is unthreaded hole 22-1, and light electrical resistivity survey
Survey device end flanges secured adjusted seat 20 hole is screwed hole 20-1, because having corresponding external screw thread, screw thread on photodetector 5
Hole is used for connecting detector.The full sectional view f in full sectional view c and Fig. 5 from Fig. 4 can be clearly seen that the difference of structure
Different, the hole in full sectional view c is screwed hole, and the hole in full sectional view f is unthreaded hole.Photodetector end flanges secured adjusted seat
Screwed hole can directly and have externally threaded photodetector and connect, and unthreaded hole is used to through optical fiber collimator, afterwards by
Screwed hole on optical fiber collimator is connected with optical fiber collimator flange secured adjusted seat.
Optical fiber collimator 12, photodetector 5 are respectively by corresponding collimator end flange secured adjusted seat 22, light electrical resistivity survey
Survey device end flanges secured adjusted seat 20 to become one with multiple reflections gas absorption cell 6.Concrete structure is referring to Fig. 2,3,4,5.
The detection process of this device and operation principle are described as follows：
Flue gas sampling system is set up on the basis of commercial smoking machine 2.Experiment requires to adopt restricted suction mode according to ISO,
Every cigarette is carried out aspirating by mouth, every mouthful of suction time is 2s, draw volume is 35mL flue gas, under carrying out after the 58s of interval
Aspirate flatly, 6 mouthfuls of suction fixed by every cigarette.For eliminating the interference bringing that lights a cigarette, in experiment, adopt electronics automatic cigarette-lighting mode.
The suction of cigarette drives piston to complete by stepper motor 1.PTFE filter disc can filter the particulate matter more than or equal to 0.22um.Cambridge
Filter disc can filter and be more than 99.9% more than or equal to the rejection of 0.30um DOP standard particle, and it is global cigarette standard " Cambridge
The special filtering medium of filter disc method ", method is to simulate people's smoking process using smoking machine, retains cigarette smoking by cambridge filter
During particulate matter and nicotine, tar and nicotine content are measured by HPLC.The flue gas of suction first passes through cambridge filter
Or polytetrafluoroethylene (PTFE)（PTFE）Film filter disc filters out particulate matter, to prevent from polluting optical system, then via triple valve 13
Enter multiple reflections gas absorption cell 6.
Multiple reflections gas absorption cell 6 is simultaneously available for fixing and open path gas concentration detection.Multiple reflections gas
Body absorption cell 6 can for model HT-3S, HT-10M, HT-15L gas absorption cell or other Maurice Herriott gas absorption cells and
White pond one kind therein.Multiple reflections gas absorption cell volume is between 50-1000mL.
Laser current controller 8 and temperature controller 10 provide sawtooch sweep signal and the 40KHz of 50Hz to laser instrument 9
Sinewave modulation signal, laser instrument 9 output wavelength scans near under test gas central absorption wavelength.Laser beam passes through many
Secondary reflection gas absorption cell 6, is focused onto on photodetector 5 after multiple reflections.The faint letter that photodetector 5 captures
Number through lock-in amplifier be amplified process and two multiplied frequency harmonic demodulation obtain second harmonic absorption signal.Eventually pass A/D
Conversion is delivered to computer 7 and is processed.
After detection completes, two-way valve 17 cuts out, two-way valve 3 is opened, triple valve 13 switching position is connected with nitrogen cylinder,
Complete the cleaning of multiple reflections gas absorption cell 6 under vavuum pump 4 swabbing action, be that standard is carried out in the detection of lower a bite flue gas
Standby.
As shown in Figure 2,3, optical fiber collimator is connected to multiple reflections gas by optical fiber collimator flange secured adjusted seat
The light incidence end of absorption cell 6, photodetector 5 is fixed on multiple reflections gas by photodetector end flanges secured adjusted seat
The beam projecting end of body absorption cell 6, this new design saves the time of adjustment light path, simultaneously because light path is in experimentation
Fixing, it is not easily susceptible to the interference of the factors such as mechanical oscillation, make the output beam that detector detects highly stable, be unlikely to lose number
Accuracy and comparativity according to real-time detection.
When light is incident from optical fiber collimator, light is just propagated along the center chain-dotted line of Fig. 5, if now adjusting figure
Screw on 5, rotates a certain angle the optical fiber collimator flange secured adjusted seat in Fig. 5, then incident ray will be more
Corresponding angle is rotated on little radian.By changing the size of rotation Fig. 5 angle, you can adjust the angle that incident ray is injected
Degree, the position of certain incidence point is also corresponding during adjusting to be changed.Meanwhile, at beam projecting end, in rotation Fig. 4
Photodetector end flanges secured adjusted seat, equally can finely tune the position of square photosurface and the angle on photodetector
Degree, and then make photodetector photosurface receive emergent ray, realize reception and the opto-electronic conversion of light.
As shown in Figures 6 and 7, controller temperature is set on the control panel, thus laser instrument produces certain centre wavelength
Laser beam.Adjust panel setting initial current in sweep current simultaneously and cut-off current is little around centre wavelength for realizing
The scanning of scope.Centre wavelength correspond to the wavelength of under test gas, and the scope of surface sweeping electric current presses the absorption line shape letter of under test gas
Depending on the half-breadth counting and the cross jamming avoiding other gases.
Laser instrument is controlled by laser current controller and laser temperature controller.Laser temperature controller is required for setting
Temperature after, laser instrument produce specific wavelength laser beam.Laser current controller produces the sawtooth signal of tens of Hz, saw
Tooth ripple signal controls a slow sweep current, completes the scanning to specific centre wavelength under test gas absworption peak.The model of scanning
Enclose and arrange different initial currents to be controlled with terminating electric current by controlling interface.Modulation signal generator produces tens of kHz
Sine wave signal is modulated.Modulated signal drives laser instrument to produce corresponding light beam, warp in multiple reflections gas absorption cell
From light hole outgoing after multiple reflections, and then it is received by a photoelectric detector.Photodetector is converted into electric signal optical signal, electricity
Signal sends into data collecting card, signal is amplified through lock-in amplifier, two frequency multiplication demodulation process, preamplifier amplify and
Enter computer after digital-to-analogue conversion to carry out data processing and show.Gas concentration can be obtained afterwards after concentration calibration.
Design sketch such as Fig. 8 of whole monitoring, shown in Fig. 9.Fig. 8 is the dynamic detection song of flue gas composition concentration during cigarette smoking
Line, is reflected in the dynamic change trend of flue gas composition concentration during cigarette smoking.Fig. 9 is flue gas group during cigarette smoking
Divide the difference curves of the dynamic detection curve of concentration, the rate of change of reactive gas species concentration.Apparatus of the present invention are easy and simple to handle,
Detecting step is simple, enables gas dynamic monitoring exactly, the result of monitoring is to further investigation cigarette combustion and pyrolysis mechanism tool
Significant, in detection cigarette smoke, flue gas toxity can preferably be assessed by pernicious gas simultaneously.
Claims (10)
1. during a kind of dynamic monitoring cigarette smoking flue gas composition concentration device it is characterised in that：Aspirate flow direction by flue gas
Including the smoking machine being sequentially communicated, smoking machine two-way valve, multiple reflections gas absorption cell, filter disc, triple valve and cigarette holder,
It is connected with optical fiber collimator, laser instrument and laser current controller in the light incidence end of multiple reflections gas absorption cell and swash
Light temperature controller, is connected with photodetector at the light receiver end of multiple reflections gas absorption cell, described laser current control
Device processed, laser temperature controller are all connected with computer, and described photodetector is connected with computer by data collecting card
Connect, the gas circuit between smoking machine two-way valve and multiple reflections gas absorption cell is connected with vavuum pump by two-way valve.
2. during dynamic monitoring cigarette smoking according to claim 1 flue gas composition concentration device it is characterised in that：
Described multiple reflections gas absorption cell is any one of White pond or Maurice Herriott gas absorption cell, and volume is in 50-
Between 1000mL.
3. during dynamic monitoring cigarette smoking according to claim 1 flue gas composition concentration device it is characterised in that：
Described smoking machine is orthoscopic smoking machine or rotating disc type smoking machine, and smoking machine can be single channel or multichannel.
4. during dynamic monitoring cigarette smoking according to claim 1 flue gas composition concentration device it is characterised in that：
Described filter disc is polytetrafluoroethylene (PTFE)（PTFE）Film filter disc or cambridge filter.
5. during the dynamic monitoring cigarette smoking according to claim 1 or 3 flue gas composition concentration device, its feature exists
In：The power source of described smoking machine is stepper motor.
6. during dynamic monitoring cigarette smoking according to claim 1 flue gas composition concentration device it is characterised in that：
It is connected by collimator end flanges secured adjusted seat between described optical fiber collimator and multiple reflections gas absorption cell, at this
It is evenly equipped with three waist-shaped holes on collimator end flange secured adjusted seat circumferencial direction, corresponding on multiple reflections gas absorption cell end face
It is machined with three screwed holes；Meanwhile, one end face of collimator end flange secured adjusted seat is designed to inclined-plane, and this inclined-plane is used for fitting
One end face of multiple reflections gas absorption cell；Three screws are respectively charged into collimator end flange secured adjusted seat circumferentially three
In individual uniform waist-shaped hole, so that collimator end flange secured adjusted seat inclined-plane is pasted with multiple reflections gas absorption cell end face simultaneously
Close, and pass through three mode connects for screws；When light is incident from optical fiber collimator center line, along collimator end flange secured adjusted seat
The center line of upper centre bore is propagated, because the binding face of collimator end flange secured adjusted seat is an inclined-plane, if now adjusting pine
Screw on collimator end flange secured adjusted seat, rotates a certain angle collimator end flange secured adjusted seat, then incident
Light will rotate corresponding angle on a less radian, and meanwhile the position of the incidence point of incident ray also occurs
Change.
7. during dynamic monitoring cigarette smoking according to claim 1 flue gas composition concentration device it is characterised in that：
It is connected by a detector end flanges secured adjusted seat between described photodetector and multiple reflections gas absorption cell, at this
It is evenly equipped with three waist-shaped holes on detector end flanges secured adjusted seat circumferencial direction, corresponding on multiple reflections gas absorption cell end face
It is machined with three screwed holes；Meanwhile, detector end flanges secured adjusted seat end face is designed to inclined-plane, and this inclined-plane is used for fitting many
One end face of secondary reflection gas absorption cell；Three screws are respectively charged into detector end flanges secured adjusted seat circumferentially three
In uniform waist-shaped hole, so that detector end flanges secured adjusted seat inclined-plane is fitted with multiple reflections gas absorption cell end face simultaneously,
And pass through three mode connects for screws；When light outgoing from absorption cell, the centre bore along on detector end flanges secured adjusted seat
Center line propagate, because the binding face of detector end flanges secured adjusted seat is inclined-plane, if now adjusting loose detector end
Screw on flange secured adjusted seat, rotates a certain angle detector end flanges secured adjusted seat, then emergent ray will
A less radian rotates corresponding angle, meanwhile the position of the eye point of emergent ray also there occurs change.
8. during dynamic monitoring cigarette smoking according to claim 7 flue gas composition concentration device it is characterised in that：
The centre bore of detector end flanges secured adjusted seat is screwed hole, is easy to be connected with the external screw thread on photodetector.
9. during the dynamic monitoring cigarette smoking according to claim 1 or 6 or 7 flue gas composition concentration device, it is special
Levy and be：Optical fiber collimator, photodetector are respectively by corresponding collimator end flange secured adjusted seat, photodetector end
Flange secured adjusted seat and multiple reflections gas absorption cell become one.
10. during dynamic monitoring cigarette smoking according to claim 1 flue gas composition concentration device, its feature exists
In：Described data collecting card is internally provided with lock-in amplifier, A/D converter, is amplified by signal, two multiplied frequency harmonic demodulate
The second harmonic absorption signal arriving, then it is delivered to computer after analog-to-digital conversion, to complete to process and to show.
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| CN201610998074.8A CN106404694B (en) | 2016-11-14 | 2016-11-14 | Device for dynamically monitoring smoke component concentration in cigarette smoking process |
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| CN107450192A (en) * | 2017-09-22 | 2017-12-08 | 中国烟草总公司郑州烟草研究院 | A kind of small-sized three-dimensional adjusting means for optical path adjusting |
| CN107505286A (en) * | 2017-09-22 | 2017-12-22 | 中国烟草总公司郑州烟草研究院 | Oxygen consumption amount detecting device and detection method during a kind of cigarette is burnt and sucked |
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| CN107807165A (en) * | 2017-11-29 | 2018-03-16 | 安徽中烟工业有限责任公司 | A kind of experimental provision for monitoring smoker's suction and exhalation gaseous phase of main stream smoke of cigarette chemical composition oral cavity residual efficiency on-line |
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| CN113376754A (en) * | 2021-04-29 | 2021-09-10 | 中国电子科技集团公司第十四研究所 | Fixed end cover and multi-path optical fiber rotary connector |
| CN113419309A (en) * | 2021-05-21 | 2021-09-21 | 中国电子科技集团公司第十四研究所 | Optical fiber collimator of multi-path optical fiber rotary connector and fixing method thereof |
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| CN107064030A (en) * | 2017-02-28 | 2017-08-18 | 靖西市秀美边城农业科技有限公司 | A kind of cigarette smoke automatic detection device |
| CN107450192A (en) * | 2017-09-22 | 2017-12-08 | 中国烟草总公司郑州烟草研究院 | A kind of small-sized three-dimensional adjusting means for optical path adjusting |
| CN107505286A (en) * | 2017-09-22 | 2017-12-22 | 中国烟草总公司郑州烟草研究院 | Oxygen consumption amount detecting device and detection method during a kind of cigarette is burnt and sucked |
| CN107450192B (en) * | 2017-09-22 | 2023-05-12 | 中国烟草总公司郑州烟草研究院 | Small three-dimensional adjusting device for adjusting light path |
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| CN107807165A (en) * | 2017-11-29 | 2018-03-16 | 安徽中烟工业有限责任公司 | A kind of experimental provision for monitoring smoker's suction and exhalation gaseous phase of main stream smoke of cigarette chemical composition oral cavity residual efficiency on-line |
| CN107807165B (en) * | 2017-11-29 | 2024-05-03 | 安徽中烟工业有限责任公司 | Experimental device for on-line monitoring oral cavity residual efficiency of gas phase chemical components of main stream smoke of cigarettes inhaled and exhaled by smokers |
| CN108872145A (en) * | 2018-04-26 | 2018-11-23 | 中国烟草总公司郑州烟草研究院 | A kind of measurement method of the charcoal heating cigarette heating source material by mouth combustion heat release amount |
| CN108872145B (en) * | 2018-04-26 | 2020-07-21 | 中国烟草总公司郑州烟草研究院 | Method for measuring heat release quantity of heat supply material of carbon-heated cigarette by mouth combustion |
| CN113376754A (en) * | 2021-04-29 | 2021-09-10 | 中国电子科技集团公司第十四研究所 | Fixed end cover and multi-path optical fiber rotary connector |
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