CN206270240U - A kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode - Google Patents
A kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode Download PDFInfo
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- CN206270240U CN206270240U CN201621390268.1U CN201621390268U CN206270240U CN 206270240 U CN206270240 U CN 206270240U CN 201621390268 U CN201621390268 U CN 201621390268U CN 206270240 U CN206270240 U CN 206270240U
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- emitting diode
- photodiode
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Abstract
A kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode,Including deep-UV light-emitting diode,Reference photodiode,Signal photodiode,Circulation detecting pool,Multimode fiber-optic bundle,Gas access,Gas vent and current source,Wherein current source is connected to its function and sends monochromatic source with deep-UV light-emitting diode,Light source is transmitted by multimode fiber-optic bundle,Simple optical fiber in the multimode fiber-optic bundle wherein drawn from deep-UV light-emitting diode guides reference photodiode into,Remaining optical fiber is placed in circulation detecting pool porch,Circulation detecting pool outlet is connected with signal photodiode,Gas inlet-outlet is laid respectively in circulation detecting pool gateway,Absorbance is obtained so as to be detected by reference to the incident light and transmitted intensity comparing calculation of photodiode and signal photodiode,The utility model can be to including benzene there is provided one kind,Toluene,Ethylbenzene,Ortho-xylene,Meta-xylene,The benzene homologues gas absorption detector of paraxylene,The detector sensitivity is high,Detection low in energy consumption and with relatively low cost realization to benzene homologues.
Description
Technical field
The present invention relates to a kind of gas absorption detector, more particularly to a kind of benzene series based on deep-UV light-emitting diode
Thing gas absorption detector.
Background technology
In recent years, the light emitting diode for deep ultraviolet wave-length coverage is just being rapidly introduced into our life, used as spectrum
During the illuminating source of detector, then monochromator or optical filter are not needed, compared with using the conventional system of deuterium lamp or tungsten lamp,
There are low-complexity and low cost, and produced with height output stability, robustness, low-power consumption and low-heat, this is in practical application
With great advantage.
Gas chromatography is the common analysis for determining these aromatic hydrocarbon in air.This separation method has selectivity
With the advantage of excellent test limit, however, due to aromatic compound UV absorption scope very well, their AAS
Measure is a kind of very attractive method.Direct absorbance measuring is simpler than gas-chromatography separation, based on this method
Instrument can be cheaper.So far, deep-UV light-emitting diode direct detection volatile aromatic compound gas is used
It was not investigated in the past, and was based on the simple absorption detection means that high intensity deep-UV light-emitting diode can build, and
Not needing monochromator carries out detection assay.
The content of the invention
The utility model provides a kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode, absorption inspection
Survey device can to including benzene, toluene, ethylbenzene, ortho-xylene, meta-xylene, paraxylene benzene homologues absorption detector, it is sensitive
Degree is high, low in energy consumption.
The utility model solve the technical scheme that is used of technical problem for：
A kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode, including deep-UV light-emitting diode
(1), reference photodiode (2), signal photodiode (3), circulation detecting pool (4), multimode fiber-optic bundle (5), gas access
(6), gas vent (7) and current source (8), wherein constant current source (8) connects with deep-UV light-emitting diode (1), is it
Power supply, deep-UV light-emitting diode (1) provides monochromatic source, and light source is by the multimode that is connected with deep-UV light-emitting diode (1)
Fibre bundle (5) is transmitted, and the simple optical fiber in the multimode fiber-optic bundle (5) drawn from deep-UV light-emitting diode (1) guides reference light into
Electric diode (2), remaining optical fiber is placed in circulation detecting pool (4) porch, circulation detecting pool (4) outlet and signal photodiode
(3) connect, gas access (6) are laid in circulation detecting pool (4) porch, gas vent (7) is laid in exit, by reference to photoelectricity
The incident light and transmitted intensity of diode (2) and signal photodiode (3) are by being calculated absorbance so as to carry out
Detection, the utility model provide it is a kind of can be to including benzene, toluene, ethylbenzene, ortho-xylene, meta-xylene, paraxylene
Benzene homologues gas absorption detector, the detector sensitivity is high, detection low in energy consumption and with relatively low cost realization to benzene homologues.
Described multimode fiber-optic bundle (5) is 7cm, 370 μm of fibre diameter, wavelength containing 20 root multimode fibers, every length
Scope is 190nm to 325nm.
Described deep-UV light-emitting diode (1) is supplied to limit the change of emissive porwer by the constant current source (8) of 100mA
Change, the wavelength of its monochromatic source for sending is 260nm, described reference photodiode (2) and signal photodiode (3)
Spectrum is using scope also in 230nm to 325nm.
Described circulation detecting pool (4) is made by aluminum pipe, and internal diameter is 2mm, length 40cm.
Brief description of the drawings
Below in conjunction with the accompanying drawings and concrete mode the invention will be further described.
Fig. 1 is a kind of benzene homologues gas absorption detector schematic diagram based on deep-UV light-emitting diode of the utility model.
Fig. 2 is a kind of benzene homologues gas absorption detector detection work based on deep-UV light-emitting diode of the utility model
Figure.
In figure, 1 is deep-UV light-emitting diode；2 is reference photodiode；3 is signal photodiode；4 is circulation
Detection cell；5 is multimode fibre group；6 is gas access；7 is gas vent；8 is current source.
Specific embodiment
In Fig. 1, a kind of benzene homologues gas absorption detector schematic diagram deep-UV light-emitting based on deep-UV light-emitting diode
On the one hand the light that diode 1 sends be conveyed into reference photodiode 2 by the single multimode fiber in multimode fibre group 5, separately
By incoming circulation detecting pool 4 after remaining optical fiber so as to reach signal photodiode 3, benzene series gas passes through gas to a part
Entrance 6 circulates after detection cell 4, is spread out of at the end gas outlet 7 at circulation detecting pool 4.
In Fig. 2, a kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode of the utility model is in detection
Procedure chart includes deep-UV light-emitting diode 1, reference photodiode 2, signal photodiode 3 and circulation detecting pool 4.It is permanent
Constant current source 8 is that deep-UV light-emitting diode 1 provides constant current, the light after on the one hand deep-UV light-emitting diode 1 is coupled
Reference photodiode 2 is delivered to, the light after on the other hand coupling is by being delivered to signal photodiode after circulation detecting pool
3, the photoelectric current obtained from reference photodiode 2 and signal photodiode 3 is then processed with logarithmic amplification, can directly obtain
To corresponding to absorbance, so as to carry out the detection of gas.
Claims (4)
1. a kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode, it is characterised in that including dark purple outgoing
Optical diode, reference photodiode, signal photodiode, circulation detecting pool, multimode fiber-optic bundle, gas access, gas go out
Mouthful and current source, wherein constant current source connects with deep-UV light-emitting diode, and multimode fiber-optic bundle is from the pole of deep-UV light-emitting two
Pipe is drawn, and an optical fiber therein guides reference photodiode into, and remaining optical fiber is placed in circulation detecting pool porch, circulation detection
Pond outlet is connected with signal photodiode, wherein lays gas inlet-outlet respectively near circulation detecting pool gateway.
2. a kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode according to claim 1, it is special
Levy and be：Described deep-UV light-emitting diode is supplied by the constant current source of 100mA, and the wavelength of its monochromatic source for sending is
260nm, described reference photodiode and the spectrum of signal photodiode are using scope also in 230nm to 325nm.
3. a kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode according to claim 1, it is special
Levy and be：Described fibre bundle contains 20 root multimode fibers, and every length is 7cm, 370 μm of fibre diameter, and wave-length coverage is
190nm to 325nm.
4. a kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode according to claim 1, it is special
Levy and be：Described circulation detecting pool is made by aluminum pipe, and internal diameter is 2mm, length 40cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621390268.1U CN206270240U (en) | 2016-12-14 | 2016-12-14 | A kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621390268.1U CN206270240U (en) | 2016-12-14 | 2016-12-14 | A kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206270240U true CN206270240U (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621390268.1U Expired - Fee Related CN206270240U (en) | 2016-12-14 | 2016-12-14 | A kind of benzene homologues gas absorption detector based on deep-UV light-emitting diode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107358780A (en) * | 2017-07-30 | 2017-11-17 | 王旭兰 | Intelligent electric spark detection warning system based on PN junction chip and preparation method thereof |
| CN112504968A (en) * | 2020-12-17 | 2021-03-16 | 利晟（杭州）科技有限公司 | Benzene series detection method of ultraviolet photoelectric detector and pollution detection system thereof |
-
2016
- 2016-12-14 CN CN201621390268.1U patent/CN206270240U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107358780A (en) * | 2017-07-30 | 2017-11-17 | 王旭兰 | Intelligent electric spark detection warning system based on PN junction chip and preparation method thereof |
| CN107358780B (en) * | 2017-07-30 | 2020-01-03 | 王旭兰 | Intelligent electric spark detection alarm system based on PN junction chip and preparation method thereof |
| CN112504968A (en) * | 2020-12-17 | 2021-03-16 | 利晟（杭州）科技有限公司 | Benzene series detection method of ultraviolet photoelectric detector and pollution detection system thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170620 Termination date: 20181214 |