CN204495718U - A kind of gaseous material sniffer based on transparent capillary structure and fluorescence - Google Patents
A kind of gaseous material sniffer based on transparent capillary structure and fluorescence Download PDFInfo
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- CN204495718U CN204495718U CN201520177648.6U CN201520177648U CN204495718U CN 204495718 U CN204495718 U CN 204495718U CN 201520177648 U CN201520177648 U CN 201520177648U CN 204495718 U CN204495718 U CN 204495718U
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Abstract
The utility model discloses a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, comprise the light-source system be arranged in capillary seat, fluoresent coating kapillary, detection system, detection system and light-source system are all arranged perpendicular to fluoresent coating capillary wall, and detection system and light-source system are 90 degree arranges, light-source system comprises the LED light source, colimated light system, the first optical filter that connect setting successively, and detection system comprises detector, the second optical filter.The utility model light source and detector are along fluoresent coating capillary wall 90 degree setting, and avoid exciting light direct irradiation detector, light path is short, decreases the impact of steam etc., and the second optical filter is isolated from gas circuit, can not be subject to gaseous contamination; The setting of sleeve pipe, reduces exciting light parasitic light, strengthens fluorescence intensity and signal intensity; Reduce signal background noise, reduce the impact detecting steam in gas, dust attachment.
Description
Technical field
The utility model relates to gas-detecting device, is specifically related to a kind of gaseous material sniffer based on transparent capillary structure and fluorescence.
Background technology
The Strength Changes of capillary tube inner wall plated film fluorescence is utilized to do gaseous material detection and analytical technology is that a kind of effective micro substance detects, analytical technology, at present, the device of this technology is adopted usually to have two kinds of forms, a kind of is on capillary tube inner wall, apply special fluorescent material, light source gets to inwall plated film, produce fluorescence, light source and the detector both sides at kapillary staggered relatively, the optical filter of light source side filters the part with wavelength of fluorescence overlap in exciting light, the optical filter of detector side selects interested wave band in fluorescence, filter exciting light, tested gas from gas sampling mouth by air pump suction, when detected air-flow passes through kapillary, plated film material can optionally react with detected material, cause fluorescence intensity spectrum change, detector detects this change to detect, analyze gaseous material, the example that this kind detects is, plated film thing is polymethoxy ethyl hexyl oxy phenylene ethylene (MEH-PPV), light source is blue-ray LED, centered by fluorescence, value is the orange-colored light of about 590nm, when nitro aromatic compound steam is by kapillary, fluorescence intensity can sharply weaken, this change can be used for detection nitryl aromatic hydro carbons material.This kind of version Problems existing is: light source and detector face opposite are settled, and the exciting light that light source sends also has shone directly on the optical filter of detector side, then through the decay of the optical filter of detector side, is detected device and receives.Be detected the exciting light that device receives and belong to invalid signals, be superimposed upon on effective fluorescence, cause detector background and export and increase, thus bring output offset to increase and the increase of ground unrest.
Another kind of version is, light source is arranged on the side of capillary wall, detector is arranged on one end that kapillary is given vent to anger, be placed on the end gas channels of kapillary by detector, fluorescence reaches capillary end by the waveguiding effect of kapillary, then be detected device to receive, under this kind of structure, detector is not in exciting light irradiated region, the interference that therefore can exciting light be suppressed to a great extent to cause, but, there is following problem in this structure: fluorescence need by total reflection transmission in the tube wall of kapillary, therefore, produce and the part of end bright dipping at fluorescence, there is any attachment phenomenon (as aqueous vapor is attached to inwall) in inside and outside wall, capital impact total reflection, structure detector being placed in end increases the distance that light transmits in glass wall, the total reflection of any point in this long light-path is destroyed, it is disturbed that capital makes light conduct, cause the irregular change that detector end exports.In addition, the optical filter of detector side is exposed in gas circuit, and the attachments such as dust attachment and water vapor also can cause output irregular change.These two kinds of changes can cause detection to be lost efficacy, and rear one also can cause optical filter to lose efficacy, and causes mechanical disorder.
Utility model content
For problems of the prior art, the utility model object is to provide a kind of gaseous material sniffer based on transparent capillary structure and fluorescence.
The utility model is realized by the following technical programs:
Described a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, it is characterized in that comprising light-source system, fluoresent coating kapillary, detection system, light-source system, fluoresent coating kapillary, detection system is all arranged in capillary seat, detection system and light-source system are all arranged perpendicular to fluoresent coating capillary wall, and detection system and light-source system are 90 degree arranges, the inlet end of described kapillary and outlet side are provided with the first O-ring seal, light-source system comprises the LED light source connecting setting successively, colimated light system, first optical filter, detection system comprises detector, second optical filter.
Described a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, is characterized in that the junction of described light-source system, detection system and fluoresent coating capillary wall is provided with the second O-ring seal.
Described a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, it is characterized in that described capillary seat is also provided with sleeve pipe, described sleeve pipe be aluminum pipe or steel pipe other be easy to the material processed, the position of casing wall corresponding light source system and detection system is provided with opening, reflection wall is arranged in side relative with detector for internal surface of sleeve pipe, absorbing barrier or reflecting wall are arranged in side relative with light-source system for internal surface of sleeve pipe.
Described a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, is characterized in that described colimated light system is lens or the right cylinder with optical aperture.
Described a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, it is characterized in that the degree of depth of described optical aperture is 4-15mm, aperture is 1-4mm, and aperture inwall scribbles black light-absorbing material or black light-absorbing coating.
Described a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, it is characterized in that described fluoresent coating kapillary scribbles different phosphor coat successively along inwall length direction, each phosphor coat interval is arranged, and described light-source system is identical with the number of phosphor coat with the number of detection system.
Described a kind of gaseous material sniffer based on transparent capillary structure and fluorescence, is characterized in that the socket of described sleeve pipe is arranged on fluoresent coating kapillary, and leaves gap with the outer wall of fluoresent coating kapillary.
Compared with prior art, there is following beneficial effect in the utility model:
1) light source and detector are along fluoresent coating capillary wall 90 degree setting, avoid exciting light direct irradiation detector, this structured illumination, office of acceptance is limited to capillary tube inner wall plated film part, light path is short, decrease the impact of attachment in the air-flow such as steam, dust, the second optical filter is isolated from gas circuit, can not be subject to gaseous contamination;
2) setting of sleeve pipe, can reduce exciting light parasitic light, or is not again reflexed on fluorescent material by the part that fluorescent material absorbs by exciting light, strengthens fluorescence intensity; Side internal surface of sleeve pipe relative for detector is arranged to reflecting wall, strengthens fluorescence signal;
3) the utility model structure can reduce signal background noise, reduces the impact detecting steam in gas, dust attachment, and by reflecting wall and absorbing barrier, effectively strengthens signal, reduce parasitic light.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model inner structure schematic diagram;
Fig. 3 is the utility model fluoresent coating capillary pipe structure schematic diagram;
Fig. 4 is the utility model light source and detector alternation schematic diagram in time;
In figure: 1-kapillary, 2-capillary seat, 3-LED light source, 4-colimated light system, 5-first optical filter, 6-detector, 7-second optical filter, 8-O-ring seal, 9-sleeve pipe, 10-opening, 11-phosphor coat.
Embodiment
Below in conjunction with Figure of description, the utility model is described in further detail, and provides embodiment.
As shown in Figure 1-2, a kind of gaseous material sniffer based on transparent capillary structure and fluorescence of the utility model, for detection and the analysis of toxic article volatilization gas, flammable material volatilization gas, drugs volatilization gas, explosive volatilization gas etc.Comprise the light-source system, fluoresent coating kapillary 1, the detection system that are equipped with in capillary seat 2, for convenience of installing, being provided with the second O-ring seal in the junction of light-source system, detection system and fluoresent coating capillary wall, not marking in figure, detection system and light-source system are all arranged perpendicular to fluoresent coating capillary wall, and detection system and light-source system are 90 degree arranges, for guaranteeing that gas circuit is airtight, the first O-ring seal 8 is provided with at the inlet end of kapillary and outlet side, realize suction head, base rear end air flue and intercapillary sealing, light-source system comprises the LED light source 3 connecting setting successively, colimated light system 4, first optical filter 5, colimated light system 4 is lens or the right cylinder with optical aperture, wherein the degree of depth of optical aperture is 4-15mm, aperture is 1-4mm, aperture inwall scribbles black light-absorbing material or black light-absorbing coating, detection system comprises detector 6, second optical filter 7.
For strengthening fluorescence intensity and reducing exciting light parasitic light, capillary seat 2 is also provided with sleeve pipe 9, casing pipe sleeve is connected on fluoresent coating extracapillary, and leave gap with the outer wall of fluoresent coating kapillary, sleeve pipe is aluminum pipe or steel pipe, the position of casing wall corresponding light source system and detection system is provided with opening 10, reflection wall is arranged to by methods such as polishings in side relative with detector for internal surface of sleeve pipe, absorbing barrier or reflecting wall are arranged in side relative with light-source system for internal surface of sleeve pipe, wherein absorbing barrier is by oxidizing blackening, the method preparations such as plating black absorbing material.
Light source and detector 6 arrange in an angle of 90 degrees by the utility model, guarantee that the direction of air-flow is without detector, colimated light system 4 is added before light source, make output light parallel to a certain extent, exciting light is avoided to be irradiated to detector direction, this directional light is by fluoresent coating kapillary 1 tube wall, be mapped on the fluorescence plated film of inwall, the fluorescence that a part produces is received by the detector 6 that right angle is placed, the absorbing barrier of the exciting light do not absorbed by fluorescent material then sleeve opposite side absorbs, and reduce spuious, or reflecting wall returns, again irradiate fluorescent material, strengthen fluorescence signal.The part of the not direct directive detector 6 of the fluorescence that fluorescence plated film produces, the reflection wall being detected device opposite side is reflected back detector 6 direction, enhances the fluorescence reception amount of detector 6.
The utility model can expand to single channel gas passage, the structure of multiplex optical passage, by the reaction of multiple fluorescent substance to same road gas, improve the kind that detector 6 selectivity also can increase the detection of gas compositions, different phosphor coat 11 is scribbled successively along inwall length direction at fluoresent coating kapillary, each phosphor coat 11 interval is arranged, and light-source system is identical with the number of phosphor coat with the number of detection system.As shown in Figure 3, kapillary 1 inwall is alongst coated with different fluorescent materials successively, air-flow through kapillary, successively with each fluorescent material effect.The fluorescence excitation of often kind of fluorescent material, receives all as shown in Figure 1, is independently subsystem.In order to avoid interfering with each other between fluorescence, exciting light need stagger in time, the detector also only Received signal strength when this excitation.As shown in Figure 4, the alternation in time of excitation source and detector, doing so avoids the interference between optical channel.
Claims (7)
1. the gaseous material sniffer based on transparent capillary structure and fluorescence, it is characterized in that comprising light-source system, fluoresent coating kapillary (1), detection system, light-source system, fluoresent coating kapillary, detection system is all arranged in capillary seat (2), detection system and light-source system are all arranged perpendicular to fluoresent coating capillary wall, and detection system and light-source system are 90 degree arranges, the inlet end of described kapillary and outlet side are provided with the first O-ring seal (8), light-source system comprises the LED light source (3) connecting setting successively, colimated light system (4), first optical filter (5), detection system comprises detector (6), second optical filter (7).
2. a kind of gaseous material sniffer based on transparent capillary structure and fluorescence according to claim 1, is characterized in that the junction of described light-source system, detection system and fluoresent coating capillary wall is provided with the second O-ring seal.
3. a kind of gaseous material sniffer based on transparent capillary structure and fluorescence according to claim 1, it is characterized in that described capillary seat (2) is also provided with sleeve pipe (9), described sleeve pipe (9) is aluminum pipe or steel pipe, the position of casing wall corresponding light source system and detection system is provided with opening (10), reflection wall is arranged in side relative with detector for internal surface of sleeve pipe, absorbing barrier or reflecting wall are arranged in side relative with light-source system for internal surface of sleeve pipe.
4. a kind of gaseous material sniffer based on transparent capillary structure and fluorescence according to claim 1, is characterized in that described colimated light system (4) is for lens or the right cylinder with optical aperture.
5. a kind of gaseous material sniffer based on transparent capillary structure and fluorescence according to claim 4, it is characterized in that the degree of depth of described optical aperture is 4-15mm, aperture is 1-4mm, and aperture inwall scribbles black light-absorbing material or black light-absorbing coating.
6. a kind of gaseous material sniffer based on transparent capillary structure and fluorescence according to claim 1, it is characterized in that described fluoresent coating kapillary scribbles different phosphor coat (11) successively along inwall length direction, each phosphor coat interval is arranged, and described light-source system is identical with the number of phosphor coat with the number of detection system.
7. a kind of gaseous material sniffer based on transparent capillary structure and fluorescence according to claim 3, is characterized in that described sleeve pipe (9) socket is arranged on fluoresent coating kapillary (1), and leaves gap with the outer wall of fluoresent coating kapillary.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520177648.6U CN204495718U (en) | 2015-03-27 | 2015-03-27 | A kind of gaseous material sniffer based on transparent capillary structure and fluorescence |
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| CN201520177648.6U CN204495718U (en) | 2015-03-27 | 2015-03-27 | A kind of gaseous material sniffer based on transparent capillary structure and fluorescence |
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| CN204495718U true CN204495718U (en) | 2015-07-22 |
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| CN201520177648.6U Withdrawn - After Issue CN204495718U (en) | 2015-03-27 | 2015-03-27 | A kind of gaseous material sniffer based on transparent capillary structure and fluorescence |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908421A (en) * | 2017-01-18 | 2017-06-30 | 北京蓝色星语科技有限公司 | A kind of multichannel dangerous substance detection method and detection means |
| CN115791730A (en) * | 2022-11-30 | 2023-03-14 | 中船重工安谱（湖北）仪器有限公司 | Optical detection module for detecting trace drugs and explosives |
-
2015
- 2015-03-27 CN CN201520177648.6U patent/CN204495718U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908421A (en) * | 2017-01-18 | 2017-06-30 | 北京蓝色星语科技有限公司 | A kind of multichannel dangerous substance detection method and detection means |
| CN115791730A (en) * | 2022-11-30 | 2023-03-14 | 中船重工安谱（湖北）仪器有限公司 | Optical detection module for detecting trace drugs and explosives |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150722 Effective date of abandoning: 20171124 |
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| AV01 | Patent right actively abandoned |