CN105259152A - Device for gas detection - Google Patents
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- CN105259152A CN105259152A CN201510737992.0A CN201510737992A CN105259152A CN 105259152 A CN105259152 A CN 105259152A CN 201510737992 A CN201510737992 A CN 201510737992A CN 105259152 A CN105259152 A CN 105259152A
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Abstract
The invention discloses a device for gas detection. The device for gas detection comprises a laser-induced fluorescence device, a gas reaction device, a visible light detection device and a gas reaction chamber driving mechanism, wherein the laser-induced fluorescence device comprises a spectrograph, a laser LED module, a light selection bracket, adjustment supports, a base I, a screw rod, a rail, an optical fiber I and a screw rod rotation driving mechanism; the gas reaction device comprises a motor II, a gas pump, a porphyrin sensor sheet, a gas reaction chamber, a reaction platform, a rotary shaft and an optical fiber scaffold III; the visible light detection device comprises an LED light equalizing plate and a camera; the gas reaction chamber driving mechanism comprises a motor III, a base II, a guide rail, a lead screw and a sliding workbench. The device for gas detection performs quick qualitative and quantitative detection on gas target substances; due to organic combination of visible light signals, fluorescence signals and a porphyrin-based cross response sensor array, research and exploration on a gas time-frequency multi-index union feature vector extraction and pattern recognition method are realized.
Description
Technical field
The present invention relates to one widely used gas-detecting device in the fields such as medical treatment, food security, environmental protection, particularly relate to a kind of device for gas detect.
Background technology
Gas detect is all widely used in fields such as medical treatment, food security, environmental protection, the every aspect of infiltration national product life.Medical treatment aspect, breath detects as a kind of emerging diagnostic method with broad prospects for development, because it has Non-Invasive advantage, is just more and more paid attention to by countries in the world.The relevant breath mark of various diseases is determined, as asthma, lung cancer, myocardial ischemia, diabetes, rheumatoid arthritis, cystic fibrosis of the pancreas, helicobacter pylori cause gastritis and gastric ulcer etc.Current various countries researchist is still finding some and the breathing diagnostic method breathing relevant disease, wherein lung cancer is because gas marker is determined substantially, and lung cancer because of its incidence of disease and death high, traditional means makes a definite diagnosis complexity, expensive, be difficult to use in ubiquity examination, therefore the research detected breath is one of the focus in this field always.Whether some volatile organic gas in breath and human body suffer from lung cancer, even with lung cancer have close relationship by stages, can be used as the mark of diagnosing.Compared with traditional lung cancer detection method, undertaken diagnosing not only cost lower by gas mark, the more important thing is that it has non-invasive, and be expected to carry out examination to early stage lung cancer, thus greatly improve the survival rate of patients with lung cancer.Food security aspect, agricultural chemicals, as the first pollution source of crops, causes very large negative effect to the food security of the mankind.Raising along with human living standard and the requirement to quality of life more and more higher, current study hotspot is become to the detection method research of the residues of pesticides in crops and agricultural byproducts.Environmental protection aspect, along with the development of industry now, the pollution of industrial gaseous waste to environment is more and more outstanding, and they cause the harm of extreme to the earth environment that people depend on for existence.Industrial gaseous waste refers to the various general names containing contaminant gases entering air produced in enterprise's on-site fuel combustion and production process, as sulphuric dioxide, ammonia, formaldehyde etc.These waste gas have larger negative effect to human body, animals and plants, weather, weather.It is detected in real time, is conducive to controling effectively to pollution, to build the environment being suitable for the mankind and living for a long time, work.
At present, detection method for above-mentioned substance mainly contains gas/liquid phase chromatograph-mass spectrometer coupling (Gas/LiquidChromatography-MassSpectrometer-computer, GC-MS), Proton transfer reaction mass spectrometry (ProtonTransferReactionMassSpectrometry, PTR-MS), ion mobility spectrometry (IonMobilitySpectrometer, IMS) and sensor detecting.Wherein above three kinds of complicated operations, expensive and consuming time, can not realize real-time online and detect.Comparatively speaking, sensor method is the novel detection method grown up in the last few years, due to its fast response time, highly sensitive, becomes a kind of novel gas-liquid substance detecting method.In current research report sensor, method modal mainly based on photochemistry, based on galvanochemistry, based on surface acoustic wave, based on crystal microbalance these four kinds.
Optochemical sensor adopts the sensitive material on sensor array to analyze sample in the mode of cross response, is a kind of sensor technology that can detect VOCs in breath fast.Colorimetric sensor array, according to sensitive material Non-specific in array and the specific effect detecting gas, can realize the visuality identification to VOCs.Mazzone etc. first reported the application of visual sensor array at lung cancer gas-monitoring, and by detecting the test of sample to 143, response reaches 73.3%, and specificity is to 72.4%.Sensor after improvement have detected 229 samples to be tested (92 patients with lung cancer, 137 check samples), and accuracy rate is more than 80%.Compared with Optochemical sensor, electrochemical sensor has higher signal response and sensitivity.VanessaH.Tran etc. report a kind of Hexamermis spp chip sensor array, each channel chip comprises a tin oxide electrode, on electrode, coated upper lanthanide rare metallic film, detects the resistance variations on each electrode by micro-electrical devices, can realize the detection to VOCs in breathing gas.Cyranose320 formula handheld portable chemiluminescent gas analyzer also can be used for breathing gas and detects.This sensor is made up of 32 nanometer polymer sensor arraies, and when contacting with breathing gas, Nano compound expands, and causes array chip resistance to change, thus realizes the fingerprint recognition to different breathing gas.This biosensor analysis 10 Patients with Non-small-cell Lungs, 10 diseases send out Patients with Chronic Obstructive Pulmonary Disease and 10 normal persons, accuracy is more than 80%.Peng etc. do the coated semiconductor microactuator electrode of sensitive material with ligand-modified nano Au particle and have prepared VOCs detection arrays sensor.Testing result display uses nano Au particle sensor well detection of lung cancer patient to organize and normal healthy controls group, and has higher sensitivity and specificity, and test sample does not need in advance except the step such as water vapor and enrichment.Saw sensor is a kind of a kind of senser element built on high frequency mechnical oscillator basis, and it can provide a kind of simple, the chemistry of Sensitive Detection material, physical property method.Surface acoustic wave chemical sensor has higher sensitivity and accuracy of detection, can only be used for gas phase analysis at present.The XingChen of Zhejiang University etc. with the coated SAW sensor electronic nose of polyisobutylene to have detected patients with lung cancer breathing gas.This sensor have detected breathing gas and lung carcinoma cell metabolism gas respectively, and found that in lung carcinoma cell metabolin has four kinds of VOCs can as specificity lung cancer marker.The Cleaning Principle of quartz microbalance sensor make use of the piezoelectric effect of quartz crystal, and structure is simple, and highly sensitive, cost is low, and its measuring accuracy can reach nanogram magnitude.CorradoDiNatale etc. have wrapped up layer of metal porphyrin film at micro-day traditional plane surface, due to the specific effect between Porphyrin Molecule and VOCs, greatly strengthen signal response and the selectivity of sensor.This biosensor analysis 60 detects samples, and 35 patients with lung cancer, 18 normal controls samples, 9 is postoperative patient.Result shows, patients with lung cancer differentiation rate is up to 100%, and control sample differentiation rate is that 94%, 44% postoperative patient is identified as patients with lung cancer.SukeriAnandhakumar etc. are detected parathion-methyl by gold atom race modified electrode.Electrochemistry experiment result indicates has good linear relationship under the 10-80 μM of concentration range with 1-10nM, detectability can reach 0.65nM, experiment is implemented subsequently in actual sample, result is consistent with high performance liquid chromatography (HPLC) result, and this method has certain feasibility in actual sample detects.MustafaMusameh etc. modify glass electrode with mesh carbon nanotube and measure parathion-methyl, result indicates has extraordinary linear relationship (R2=0.993) in the concentration range of 20-1000nM, and after optimizing, detectability can reach 1pM.LurdesI.B.Silvaa develops a kind of portable fiber-optic sensor and achieves benzene, toluene, ethylbenzene, P-xylene, the remote monitoring of m-xylene and o-xylene (BTEX).And the performance of benzene homologues and more traditional analytical approach are monitored in the calibration of this analyser and test analysis, namely gas chromatography adds that a flame ionization detector (GC-FID) compares.The former has higher sensitivity for analysis and accuracy, good linear relationship and stable analytic signal, and the advantage such as analysis time is short.
But the sensor nearly all only employs single signal is used as basis for estimation, only can reflect the part of properties of object gas, and the Electronic Nose using physically based deformation to adsorb had, this just makes its susceptibility not high, is therefore widely used in actual certain difficulty in addition.
Summary of the invention
For above shortcomings in prior art, the invention provides a kind of device for gas detect fast qualitative being carried out to Gaseous targets matter, quantitatively detects.
In order to solve the problems of the technologies described above, present invention employs following technical scheme:
For the device of gas detect, comprise laser-induced fluorescence (LIF) device, gas reaction device, visible detection device and gas reaction chamber driving mechanism;
Described laser-induced fluorescence (LIF) device comprises spectrometer, laser LED module, selects light support, regulates the mechanism of support, base I, screw rod, track, optical fiber I and drive screw turns, described base I is installed in orbit and is slidably matched with track, the middle part of described base I arranges threaded hole, described screw rod through base I threaded hole and with threaded hole threaded engagement, described screw rod and parallel track, described adjustment support is two and is set in parallel on base I, two adjustment supports arrange the bar hole be parallel to each other, the described bottom of light support of selecting is by being connected on two adjustment supports through the adjusting bolt of bar hole, the described top of light support of selecting is furnished with fibre-optical splice I, one end of described optical fiber I to be arranged on fibre-optical splice I and corresponding with laser LED module coaxial cable,
Described gas reaction device comprises motor II, air pump, porphyrin sensors slice, thin piece, gas reaction chamber, reaction bench, turning axle and structure of fiber_optic III, described reaction bench is positioned at gas reaction indoor, turning axle through gas reaction chamber bottom and be sealed and matched with its rotation, described reaction bench is fixed on the top of turning axle, turning axle is driven by motor II, the bottom of described gas reaction chamber and the top cover of gas reaction chamber are made by transparent material, the side of described gas reaction chamber arranges air intake opening, the opposite side of described gas reaction chamber sets out gas port, the gas outlet of described air pump connects the air intake opening of gas reaction chamber, porphyrin sensors slice, thin piece is placed on reaction bench, porphyrin sensors slice, thin piece is along the circumferential direction laid with several porphyrin sensors, described structure of fiber_optic III is arranged on the side of gas reaction chamber, the top of described structure of fiber_optic III arranges a fibre-optical splice IV, the middle part of described structure of fiber_optic III arranges a fibre-optical splice V, described fibre-optical splice IV and fibre-optical splice V lay respectively at above and below gas reaction chamber, fibre-optical splice IV and fibre-optical splice V corresponding at vertical direction with porphyrin sensors, the other end of described optical fiber I is arranged on fibre-optical splice IV, described spectrometer is connected with one end of optical fiber II, the other end of optical fiber II is arranged on fibre-optical splice V,
Described visible detection device comprises the equal tabula rasa of LED and camera; The equal tabula rasa of described LED is semicircular structure, and described camera is positioned at the top of the equal tabula rasa of LED, and the position of described gas reaction chamber is higher than the equal tabula rasa of LED and lower than the height of camera;
Described gas reaction chamber driving mechanism comprises motor III, base II, guide rail, screw mandrel and sliding table; Described guide rail is fixedly installed on base II, one end of guide rail is positioned at the below of the equal tabula rasa of LED, screw mandrel be arranged on base II top and and guide rail parallel, described sliding table to be arranged on guide rail and to coordinate with slide, described sliding table arranges threaded hole, described screw mandrel through sliding table threaded hole and with threaded hole threaded engagement, described screw mandrel is driven by motor III, and described motor II is fixedly installed on sliding table.
As a preferred embodiment of the present invention, described gas reaction device also comprises cross puddle support, and described cross puddle support to be fixed on reaction bench and to be positioned at porphyrin sensors slice, thin piece.
As another kind of preferred version of the present invention, described gas reaction device also comprises center rest, described center rest comprises left socle bar, right support bar and annular roof plate, the bottom of described left socle bar and right support bar is fixedly installed on the top of sliding table, described annular roof plate is fixed on the top of left socle bar and right support bar, the top of left socle bar and right support bar is stretched out annular roof plate and is formed register pin, the bottom correspondence of described gas reaction chamber arranges two detents, described gas reaction chamber is arranged on annular roof plate, the register pin in left socle bar and right support masthead portion inserts in corresponding detent.
As another preferred version of the present invention, described gas reaction device also comprises fixed base plate, left support bar, right support bar, left damping spring, right damping spring and damping suspention plate, described left support bar and right support bar are vertically fixedly installed on fixed base plate, described left damping spring is enclosed within left support bar, the top of left damping spring is fixedly connected with the top of left support bar, described right damping spring is enclosed within right support bar, the top of right damping spring is fixedly connected with the top of right support bar, described damping suspention plate is arranged between left support bar and right support bar, one end of described damping suspention plate is fixedly connected with the bottom of left damping spring, the other end of described damping suspention plate is fixedly connected with the bottom of right damping spring, described air pump is arranged on damping suspention plate.
As a modification of the present invention scheme, described gas reaction device also comprises reaction bench rotary positioning mechanism, and described reaction bench rotary positioning mechanism comprises microswitch II and touches block II; The cylindrical of described turning axle arranges a positioning block, and described shake-up block II is arranged on the spring leaf of microswitch II, and when described shake-up block II rotates with turning axle, the running orbit of locating piece is corresponding.
As another kind of improvement project of the present invention, described gas reaction device also comprises microswitch V, shake-up block V, microswitch VI and touches block VI; Described microswitch V and microswitch VI are separately positioned on the two ends of guide rail, microswitch V is positioned at the below of the equal tabula rasa of LED, described shake-up block V is arranged on the spring leaf of microswitch V, described shake-up block VI is arranged on the spring leaf of microswitch VI, and described shake-up block V is all corresponding with sliding table with shake-up block VI.
Scheme as a further improvement on the present invention, described laser-induced fluorescence (LIF) device also comprises microswitch III, shake-up block III, microswitch IV and touches block IV; Described microswitch III and microswitch IV are separately positioned on the two ends of track, described shake-up block III is arranged on the spring leaf of microswitch III, described shake-up block IV is arranged on the spring leaf of microswitch IV, and described shake-up block III is corresponding with base I with shake-up block IV.
Compared with prior art, the present invention has following technological merit:
1, the device for gas detect carries out qualitative and quantitative analysis fast with realization to Gaseous targets matter; By by visible light signal and fluorescence signal and organically combine based on the cross response sensor array of porphyrin, to the extraction of gas time-frequency multi objective union feature vector and the research and probe of mode identification method.
2, by detection to multiple gases target substance, wish that the quick detection for realizing the above-mentioned great problem deeply concerned such as lung cancer early screening, environmental pollution gas Real-Time Monitoring provides reference, and provide a new thinking for gas detect.
3, this device studies some and major disease, food security, environmental pollution etc. have with national product life aspect the union feature of gas under multi signal pattern be closely connected, and the mode identification method of goal seeking gas mark accordingly.
4, under verifying object gas, based on time-frequency multi objective joint eigenvalue vector and the extracting method thereof of dual signal.
5, this device can investigate the characteristic of object from multiple angle, contribute to identifying determinand more exactly, and then provide foundation for production practices and clinical diagnosis, both there is important scientific value and academic significance, there is again huge actual application prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device for gas detect;
Fig. 2 is the structural representation of laser-induced fluorescence (LIF) device;
Fig. 3 is the structural representation of gas reaction chamber;
Fig. 4 is the structural representation of center rest.
In accompanying drawing, 1-spectrometer; 2-laser LED module; 3-select light support; 4-regulate support; 5-base I; 6-screw rod; 7-track; 8-bar hole; 9-fibre-optical splice I; 19-motor II; 20-air pump; 21-porphyrin sensors slice, thin piece; 22-gas reaction chamber; 23-reaction bench; 24-turning axle; 25-structure of fiber_optic III; 26-porphyrin sensors; 27-fibre-optical splice IV; The equal tabula rasa of 28-LED; 29-camera; 30-motor III; 31-base II; 32-guide rail; 33-screw mandrel; 34-sliding table; 40-cross puddle support; 41-left socle bar; 42-right support bar; 43-annular roof plate; 44-register pin; 45-fixed base plate; 46-left support bar; 47-right support bar; 48-left damping spring; 49-right damping spring; 50-damping suspention plate; 51-microswitch II; 52-touch block II; 53-microswitch III; 54-touch block III; 55-microswitch IV; 56-touch block IV; 61-locating piece; 62-microswitch V; 63-touch block V; 64-microswitch VI; 65-touch block VI.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the device for gas detect comprises laser-induced fluorescence (LIF) device, gas reaction device, visible detection device and gas reaction chamber driving mechanism.
As shown in Figure 2, laser-induced fluorescence (LIF) device comprises spectrometer 1, laser LED module 2, selects light support 3, regulates the mechanism of support 4, base I 5, screw rod 6, track 7, optical fiber I, drive screw 6 rotation (in the present embodiment, this mechanism adopt motor, rotated by electric motor driven screw 6), microswitch III 53, touch block III 54, microswitch IV 55 and touch block IV 56.Laser LED module 2 is arranged on the top of spectrometer 1, and base I 5 to be arranged on track 7 and to be slidably matched with track 7, and the middle part of base I 5 arranges threaded hole, screw rod 6 through base I 5 threaded hole and with threaded hole threaded engagement, screw rod 6 is parallel with track 7.Support 4 is regulated to be two and to be set in parallel on base I 5, two adjustment supports 4 are arranged the bar hole 8 (axis being parallel of bar hole 8 and laser LED module 2) be parallel to each other, select the bottom of light support 3 by being connected on two adjustment supports 4 through the adjusting bolt of bar hole 8, the top of light support 3 is selected to be furnished with fibre-optical splice I 9, fibre-optical splice I 9 stretches to laser LED module 2, laser LED module 2 is multiple, the axis of laser LED module 2 is vertical with track 7, and one end of optical fiber I to be arranged on fibre-optical splice I 9 and corresponding with laser LED module 2 coaxial cable.Microswitch III 53 and microswitch IV 55 are separately positioned on the two ends of track 7, touching block III 54 is arranged on the spring leaf of microswitch III 53, touching block IV 56 is arranged on the spring leaf of microswitch IV 55, touches block III 54 and touch block IV 56 corresponding with base I 5.
Motor is rotated by belt pulley and belt drives screw rod 6, and then drive base I 5 to slide on track 7, the sliding scale of base I 5 is between microswitch III 53 and microswitch IV 55, the object of movable base I 5 mainly drives the fibre-optical splice I 9 on light support 3 that selects on it to move, to select corresponding laser LED module 2, guarantee to select on light station each, optical fiber is preserved coaxial with corresponding laser LED module.Bar hole 8 selects light support 3 regulating the position on support 4 for regulating, and then regulates the distance of fibre-optical splice I 9 and corresponding laser LED module.
Gas reaction device comprises motor II 19, air pump 20, porphyrin sensors slice, thin piece 21, gas reaction chamber 22, reaction bench 23, turning axle 24, structure of fiber_optic III 25 and cross puddle support 40.Reaction bench 23 is positioned at gas reaction chamber 22, turning axle 24 through gas reaction chamber 22 bottom and be sealed and matched with its rotation, reaction bench 23 is fixed on the top of turning axle 24, and turning axle 24 is driven by motor II 19.The bottom of gas reaction chamber 22 and the top cover of gas reaction chamber are made by transparent material, and the side of gas reaction chamber 22 arranges air intake opening, and the opposite side of gas reaction chamber 22 sets out gas port, and the gas outlet of air pump 20 connects the air intake opening of gas reaction chamber 22.Porphyrin sensors slice, thin piece 21 thin slice in the form of a ring, porphyrin sensors slice, thin piece 21 is placed on reaction bench 23, porphyrin sensors slice, thin piece 21 is along the circumferential direction laid with several porphyrin sensors 26, structure of fiber_optic III 25 is arranged on the side of gas reaction chamber 22, the top of structure of fiber_optic III 25 arranges a fibre-optical splice IV 27, the middle part of structure of fiber_optic III 25 arranges a fibre-optical splice V, fibre-optical splice IV 27 and fibre-optical splice V lay respectively at above and below gas reaction chamber 22, fibre-optical splice IV 27 and fibre-optical splice V corresponding at vertical direction with porphyrin sensors 26, the other end of optical fiber I is arranged on fibre-optical splice IV 27, spectrometer 1 is connected with one end of optical fiber II, the other end of optical fiber II is arranged on fibre-optical splice V.Visible detection device comprises the equal tabula rasa 28 of LED and camera 29.The equal tabula rasa of LED 28 is in semicircular structure, and camera 29 is positioned at the top of the equal tabula rasa 28 of LED, and the position of gas reaction chamber 22 is higher than the equal tabula rasa 28 of LED and lower than the height of camera 29.Gas reaction chamber driving mechanism comprises motor III 30, base II 31, guide rail 32, screw mandrel 33 and sliding table 34; Guide rail 32 is fixedly installed on base II 31, one end of guide rail 32 is positioned at the below of the equal tabula rasa 28 of LED, screw mandrel 33 is arranged on the top of base II 31 and parallel with guide rail 32, sliding table 34 to be arranged on guide rail 32 and to be slidably matched with guide rail 32, sliding table 34 arranges threaded hole, screw mandrel 33 through sliding table 34 threaded hole and with threaded hole threaded engagement, screw mandrel 33 is driven by motor III 30, and motor II 19 is fixedly installed on sliding table 34.Cross puddle support 40 to be fixed on reaction bench 23 and to be positioned at porphyrin sensors slice, thin piece 21, and as shown in Figure 3, this cross puddle support 40 can make gas to be measured be more evenly distributed in gas reaction chamber 22.
Gas reaction device also comprises center rest and reaction bench rotary positioning mechanism.Center rest comprises left socle bar 41, right support bar 42 and annular roof plate 43, as shown in Figure 4, the bottom of left socle bar 41 and right support bar 42 is fixedly installed on the top of sliding table 34, annular roof plate 43 is fixed on the top of left socle bar 41 and right support bar 42, the top of left socle bar 41 and right support bar 42 is stretched out annular roof plate 43 and is formed register pin 44, the bottom correspondence of gas reaction chamber 22 arranges two detents, gas reaction chamber 22 is arranged on annular roof plate 43, the register pin 44 at left socle bar 41 and right support bar 42 top inserts in corresponding detent.Reaction bench rotary positioning mechanism comprises microswitch II 51 and touches block II 52; The cylindrical of turning axle 24 is arranged a positioning block 61, touch block II 52 and be arranged on the spring leaf of microswitch II 51, touch the running orbit of locating piece 61 when block II 52 rotates with turning axle 24 corresponding.
In order to control the move distance of sliding table 34, make it move between the equal tabula rasa of LED and structure of fiber_optic III 25, this gas-detecting device additionally uses microswitch V 62, shake-up block V 63, microswitch VI 64 and touches block VI 65.Microswitch V 62 and microswitch VI 64 are separately positioned on the two ends of guide rail 32, microswitch V 62 is positioned at the below of the equal tabula rasa 28 of LED, touching block V 63 is arranged on the spring leaf of microswitch V 62, touching block VI 65 is arranged on the spring leaf of microswitch VI 64, touches block V 63 and touch block VI 65 all corresponding with sliding table 34.
Motor III 30 drives screw mandrel 33 to rotate, screw mandrel 33 drives sliding table 34 to slide on guide rail 32, when sliding table 34 moves to contact shake-up block VI 65, motor III 30 stops, fibre-optical splice IV 27 on structure of fiber_optic III 25 is positioned at the top of gas reaction chamber 22 and corresponding with porphyrin sensors 26, air pump 20 is by gas suction gas reaction chamber 22 to be detected, the light that laser LED module sends is incident upon on the porphyrin sensors 26 in gas reaction chamber 22 by optical fiber I, light through gas reaction chamber 22 passes through optical fiber II input spectrum instrument 1, and then realize treating gas and carrying out qualitative fast, quantitative detection.Motor III 30 drives screw mandrel 33 to reverse, screw mandrel 33 drives sliding table 34 to slide on guide rail 32, when sliding table 34 moves to contact shake-up block V 63, motor III 30 stops, the equal tabula rasa 28 of LED is positioned at the top of gas reaction chamber 22, opens the equal tabula rasa 28 of LED, and opens camera 29, camera 29 is by the response diagram picture of shooting input ARM chip, and ARM chip carries out analyzing and processing and provides testing result.Adopt visible light colors signal to measure, detect fast, highly sensitive, substantially increase the accuracy of detection.
Affect to prevent air pump 20 from producing vibration when extracting in gas inject gas reaction chamber 22 to be measured and detect, this gas reaction device have employed fixed base plate 45, left support bar 46, right support bar 47, left damping spring 48, right damping spring 49 and damping suspention plate 50.Left support bar 46 and right support bar 47 are vertically fixedly installed on fixed base plate 45, left damping spring 48 is enclosed within left support bar 46, the top of left damping spring 48 is fixedly connected with the top of left support bar 46, right damping spring 49 is enclosed within right support bar 47, the top of right damping spring 49 is fixedly connected with the top of right support bar 47, damping suspention plate 50 is arranged between left support bar 46 and right support bar 47, one end of damping suspention plate 50 is fixedly connected with the bottom of left damping spring 48, the other end of damping suspention plate 50 is fixedly connected with the bottom of right damping spring 49, air pump 20 is arranged on damping suspention plate 50, after the vibration produced when air pump 20 works is cut down by left damping spring 48 and right damping spring 49, greatly reduce the vibration that air pump 20 produces.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. for the device of gas detect, it is characterized in that: comprise laser-induced fluorescence (LIF) device, gas reaction device, visible detection device and gas reaction chamber driving mechanism;
Described laser-induced fluorescence (LIF) device comprises spectrometer (1), laser LED module (2), selects light support (3), regulates support (4), base I (5), screw rod (6), track (7), mechanism that optical fiber I and drive screw (6) rotate, described base I (5) is arranged on track (7) and goes up and be slidably matched with track (7), the middle part of described base I (5) arranges threaded hole, described screw rod (6) through base I (5) threaded hole and with threaded hole threaded engagement, described screw rod (6) is parallel with track (7), described adjustment support (4) is two and is set in parallel on base I (5), two adjustment supports (4) above arrange the bar hole (8) be parallel to each other, the described bottom of light support (3) of selecting is by being connected on two adjustment supports (4) through the adjusting bolt of bar hole (8), the described top of light support (3) of selecting is furnished with fibre-optical splice I (9), it is upper and corresponding with laser LED module (2) coaxial cable that one end of described optical fiber I is arranged on fibre-optical splice I (9),
Described gas reaction device comprises motor II (19), air pump (20), porphyrin sensors slice, thin piece (21), gas reaction chamber (22), reaction bench (23), turning axle (24) and structure of fiber_optic III (25), described reaction bench (23) is positioned at gas reaction chamber (22), turning axle (24) through gas reaction chamber (22) bottom and be sealed and matched with its rotation, described reaction bench (23) is fixed on the top of turning axle (24), and turning axle (24) is driven by motor II (19), the bottom of described gas reaction chamber (22) and the top cover of gas reaction chamber are made by transparent material, the side of described gas reaction chamber (22) arranges air intake opening, the opposite side of described gas reaction chamber (22) sets out gas port, the gas outlet of described air pump (20) connects the air intake opening of gas reaction chamber (22), porphyrin sensors slice, thin piece (21) is placed on reaction bench (23), porphyrin sensors slice, thin piece (21) is along the circumferential direction laid with several porphyrin sensors (26), described structure of fiber_optic III (25) is arranged on the side of gas reaction chamber (22), the top of described structure of fiber_optic III (25) arranges a fibre-optical splice IV (27), the middle part of described structure of fiber_optic III (25) arranges a fibre-optical splice V, described fibre-optical splice IV (27) and fibre-optical splice V lay respectively at above and below gas reaction chamber (22), fibre-optical splice IV (27) and fibre-optical splice V corresponding at vertical direction with porphyrin sensors (26), the other end of described optical fiber I is arranged on fibre-optical splice IV (27), described spectrometer (1) is connected with one end of optical fiber II, the other end of optical fiber II is arranged on fibre-optical splice V,
Described visible detection device comprises the equal tabula rasa of LED (28) and camera (29); The equal tabula rasa of described LED (28) is in semicircular structure, described camera (29) is positioned at the top of the equal tabula rasa of LED (28), and the position of described gas reaction chamber (22) is higher than the equal tabula rasa of LED (28) and lower than the height of camera (29);
Described gas reaction chamber driving mechanism comprises motor III (30), base II (31), guide rail (32), screw mandrel (33) and sliding table (34), described guide rail (32) is fixedly installed on base II (31), one end of guide rail (32) is positioned at the below of the equal tabula rasa of LED (28), screw mandrel (33) is arranged on the top of base II (31) and parallel with guide rail (32), described sliding table (34) is arranged on guide rail (32) and goes up and be slidably matched with guide rail (32), described sliding table (34) arranges threaded hole, described screw mandrel (33) through sliding table (34) threaded hole and with threaded hole threaded engagement, described screw mandrel (33) is driven by motor III (30), described motor II (19) is fixedly installed on sliding table (34).
2. the device for gas detect according to claim 1, it is characterized in that: described gas reaction device also comprises cross puddle support (40), described cross puddle support (40) is fixed on reaction bench (23) and goes up and be positioned at porphyrin sensors slice, thin piece (21).
3. the device for gas detect according to claim 1, it is characterized in that: described gas reaction device also comprises center rest, described center rest comprises left socle bar (41), right support bar (42) and annular roof plate (43), the bottom of described left socle bar (41) and right support bar (42) is fixedly installed on the top of sliding table (34), described annular roof plate (43) is fixed on the top of left socle bar (41) and right support bar (42), the top of left socle bar (41) and right support bar (42) is stretched out annular roof plate (43) and is formed register pin (44), the bottom correspondence of described gas reaction chamber (22) arranges two detents, described gas reaction chamber (22) is arranged on annular roof plate (43), the register pin (44) at left socle bar (41) and right support bar (42) top inserts in corresponding detent.
4. the device for gas detect according to claim 1, is characterized in that: described gas reaction device also comprises fixed base plate (45), left support bar (46), right support bar (47), left damping spring (48), right damping spring (49) and damping suspention plate (50), described left support bar (46) and right support bar (47) are vertically fixedly installed on fixed base plate (45), described left damping spring (48) is enclosed within left support bar (46), the top of left damping spring (48) is fixedly connected with the top of left support bar (46), described right damping spring (49) is enclosed within right support bar (47), the top of right damping spring (49) is fixedly connected with the top of right support bar (47), described damping suspention plate (50) is arranged between left support bar (46) and right support bar (47), one end of described damping suspention plate (50) is fixedly connected with the bottom of left damping spring (48), the other end of described damping suspention plate (50) is fixedly connected with the bottom of right damping spring (49), described air pump (20) is arranged in damping suspention plate (50).
5. the device for gas detect according to claim 1, it is characterized in that: described gas reaction device also comprises reaction bench rotary positioning mechanism, described reaction bench rotary positioning mechanism comprises microswitch II (51) and touches block II (52); The cylindrical of described turning axle (24) is arranged a positioning block (61), described shake-up block II (52) is arranged on the spring leaf of microswitch II (51), and when described shake-up block II (52) rotates with turning axle (24), the running orbit of locating piece (61) is corresponding.
6. the device for gas detect according to claim 1, is characterized in that: described gas reaction device also comprises microswitch V (62), shake-up block V (63), microswitch VI (64) and touches block VI (65); Described microswitch V (62) and microswitch VI (64) are separately positioned on the two ends of guide rail (32), microswitch V (62) is positioned at the below of the equal tabula rasa of LED (28), described shake-up block V (63) is arranged on the spring leaf of microswitch V (62), described shake-up block VI (65) is arranged on the spring leaf of microswitch VI (64), described shake-up block V (63) and touch block VI (65) all corresponding with sliding table (34).
7. the device for gas detect according to claim 1, is characterized in that: described laser-induced fluorescence (LIF) device also comprises microswitch III (53), shake-up block III (54), microswitch IV (55) and touches block IV (56); Described microswitch III (53) and microswitch IV (55) are separately positioned on the two ends of track (7), described shake-up block III (54) is arranged on the spring leaf of microswitch III (53), described shake-up block IV (56) is arranged on the spring leaf of microswitch IV (55), described shake-up block III (54) and touch block IV (56) corresponding with base I (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737992.0A CN105259152A (en) | 2015-11-03 | 2015-11-03 | Device for gas detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737992.0A CN105259152A (en) | 2015-11-03 | 2015-11-03 | Device for gas detection |
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Cited By (1)
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|---|---|---|---|---|
| CN112394059A (en) * | 2020-11-13 | 2021-02-23 | 广东韶测检测有限公司 | Gas detection device based on gas detection pipe information identification |
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