CN202149879U - Multicomponent oil-smoke concentration quantitative analyzer - Google Patents
Multicomponent oil-smoke concentration quantitative analyzer Download PDFInfo
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- CN202149879U CN202149879U CN 201120240135 CN201120240135U CN202149879U CN 202149879 U CN202149879 U CN 202149879U CN 201120240135 CN201120240135 CN 201120240135 CN 201120240135 U CN201120240135 U CN 201120240135U CN 202149879 U CN202149879 U CN 202149879U
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- China
- Prior art keywords
- oil smoke
- gas
- pyroelectric detector
- infrared light
- quartz glass
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Abstract
The utility model relates to a multicomponent oil-smoke concentration quantitative analyzer, which comprises a signal processing circuit, a gas pipe casing, an oil-smoke inlet, an oil-smoke outlet, a first quartz glass sheet, a second quartz glass sheet, a pyroelectric detector and four infrared light sources. The four infrared light sources are mounted at one end of the gas pipe casing in parallel, the pyroelectric detector is mounted at the other end of the gas pipe casing, four detection passages of the pyroelectric detectors are respectively provided with optical filters with different wavelength, each infrared light source aligns to one detection passage of one pyroelectric detector, and an output end of the pyroelectric detector is connected with the signal processing circuit. The ratio F of each of the detection passages to a reference passage can be acquired by the multicomponent oil-smoke concentration quantitative analyzer and then can substitute into a fitting formula respectively according to characteristics of the pyroelectric detector and the Lambert-Beer law, and thereby concentration of substance corresponding to the wave number can be obtained. The multicomponent oil-smoke concentration quantitative analyzer has the advantages regular and quantitative performance and high flexibility.
Description
Technical field
The utility model relates to a kind of analytical equipment and method of oil smoke concentration, definite say so a kind of polycomponent oil smoke concentration quantitative analysis device and analytical approach thereof.
Background technology
Along with socioeconomic fast development, the tertiary industry also is surging forward.Because the catering trade planning construction lags behind with management is serious, the fume pollution of its generation has had a strong impact on surrounding resident and has lived normally, so the fume pollution of the catering trade problem that disturbs residents just becomes the environment in recent years letters and calls masses and complains one of maximum environmental problem.The atmosphere pollution that oil smoke discharged is mainly gasoloid; Wherein contain edible oil and food volatile matter at high temperature; And the oxidation of edible oil and food, cracking, hydrolysis and the aldehydes, ketone, paraffinic and the products such as chain alkene, palycyclic aromatic that form; Composition is very complicated, and human body is had very big harmfulness.
It is the work of a complicacy that oil smoke detects; And the equipment and the method that are used for the oil smoke detection on the present domestic and international market are a lot; For example (1) traditional infrared AAS through oil smoke is sampled, extracts, measures, calculated, draws oil smoke concentration; It can accurately carry out detection computations to oil smoke concentration, but the required sampling time is with to draw the data time cycle long.(2) gas detector method uses catalyzer to make oil smoke gas and concentrated sulphuric acid generation decomposition reaction, differentiates oil smoke concentration through the depth of estimating dark reactant, and this method is fast and convenient, and is with low cost, but can't monitor oil smoke concentration in real time; (3) based on the oil smoke remote wireless monitoring system of gas sensor, can detect oil smoke concentration in real time, but detector is prone to be covered and cause serviceable life short by oil smoke, and oil smoke and standard oil smoke after filtering through metal screen differ greatly.Problems such as in sum, existing detection technique all exists real-time poor, and the life-span is short, and precision is low.
The utility model content
In order to address the above problem, it is a kind of different with prior art that the utility model provides, and real-time is good, and the life-span is long, polycomponent oil smoke concentration quantitative analysis device and analytical approach thereof that precision is high.The technical scheme that the utility model adopted is following.
Polycomponent oil smoke concentration quantitative analysis device comprises signal processing circuit, tracheae housing, oil smoke air intake opening, oil smoke gas outlet, first quartz glass plate, second quartz glass plate, pyroelectric detector and four infrared light supplies; Said four infrared light supplies are installed in an end of tracheae housing side by side; Said pyroelectric detector is installed in the other end of tracheae housing; Four detection channels of pyroelectric detector are installed the optical filter of different wave length respectively, and each infrared light supply is separately over against a detection channels of pyroelectric detector; Side in the tracheae housing is provided with said first quartz glass plate that infrared light supply and oil smoke are kept apart, and opposite side is provided with second quartz glass plate that pyroelectric detector and oil smoke are kept apart; The oil smoke air intake opening is positioned at the upper right side of tracheae housing, and the oil smoke gas outlet is positioned at the lower left of tracheae housing, and oil smoke air intake opening and oil smoke gas outlet are between first quartz glass plate and second quartz glass plate; Each infrared light supply all is arranged in a concave surface condenser; The output terminal of pyroelectric detector is connected with signal processing circuit, and said signal processing circuit is used for signal is carried out filtering, amplification, AD conversion and uses single-chip microcomputer to carry out processes and displays.
In the above-mentioned polycomponent oil smoke concentration quantitative analysis device, said signal processing circuit comprises filtering circuit, amplifying circuit, AD converter and the single-chip microcomputer that connects in order.
In the above-mentioned polycomponent oil smoke concentration quantitative analysis device, said pyroelectric detector has following characteristic:
V in the formula
GasAnd V
RefSurvey the output voltage of passage and reference channel for detector gas; I is an incident intensity; R
GasAnd R
RefBe respectively gas and survey the responsiveness of passage and reference channel; C
GasAnd C
RefBe respectively gas and survey the characteristic constant of passage and reference channel; K is the absorption coefficient of gas; L is the length of detector tube; C is a gas concentration to be measured.
In the above-mentioned polycomponent oil smoke concentration quantitative analysis device, the reference channel of described pyroelectric detector uses 4.0 μ m optical filters, and three gas are surveyed passage and used corresponding wave number to be 2930cm
-1, 2960cm
-1, 3030cm
-1Optical filter, three kinds of important group: CH in the corresponding oil smoke
2Group, CH
3Group, aromatic group.
The analytical approach of above-mentioned analytical equipment, concrete steps are:
(1) is 0% o'clock at oil smoke concentration, records corresponding gas and survey channel data V
Gas0With reference channel V
Ref0, obtain K
0=V
Gas0/ V
Ref0
(2) use the standard oil smoke of pristane, n-hexadecane, toluene configuration variable concentrations, keep n-hexadecane, toluene concentration constant, change the concentration of pristane, recording wave number is 2930cm
-1Gas survey channel data V
GasWith reference channel V
Ref, calculate its ratio F=V
Gas/ V
Ref
(3) make the pristane concentration C and record ratio F graph of a relation, and carry out curve fitting, obtain fitting formula, C=W
1* F
5+ W
2* F
4+ W
3* F
3+ W
4* F
2+ W
5* F, W in the formula
1, W
2, W
3, W
4, W
5Be respectively the fitting coefficient that calculates, C is the material concentration that will measure of institute, and F is the ratio of reference channel voltage and corresponding gas survey channel voltage.
(4) in like manner set up graph of a relation and fitting formula between n-hexadecane, toluene and the corresponding ratio F.
Above-mentioned polycomponent oil smoke concentration quantitative analysis device and analytical approach thereof; The central optical axis that it is characterized in that the corresponding gas passage of said each infrared light supply and pyroelectric detector is positioned on the same axis; Thereby guarantee that each detector receiving cable obtains identical emission light intensity, improved the sensitivity that detects.
Above-mentioned polycomponent oil smoke concentration quantitative analysis device, said infrared light supply wavelength coverage, and are placed in the concave surface condenser between the 5 μ m at 2 μ m, have strengthened the light emitted light intensity, improve the sensitivity that detects.
Above-mentioned polycomponent oil smoke concentration quantitative analysis device, described quartz glass wafer is opened infrared light supply and pyroelectric detector and oil smoke channel separation, thereby prevents that device from being covered by oil smoke, improves serviceable life.
The beneficial effect of the utility model is: utilize the characteristic of oil smoke infrared absorption spectrum and pyroelectric detector directly to detect multi-component concentration in the oil smoke; Realize surveying oil smoke concentration fast, in real time, accurately, safely, the utility model method is played a significant role aspect environmental protection.Simultaneously, the utility model is that oil smoke concentration detects a kind of real-time, quantitative, highly sensitive means that provide.
Description of drawings
Fig. 1 is the detector tube synoptic diagram that special-purpose oil smoke detects in the utility model.Among the figure: 1. tracheae housing, 2. oil smoke air intake opening, 3. oil smoke gas outlet, 4. first quartz glass plate; 5. second quartz glass plate, 6. concave surface condenser, 7. infrared light supply, 8. pyroelectric detector; 9. optical filter, 10. signal processing circuit, 11. pyroelectric detector output pins.
Fig. 2 is the implementation step process flow diagram of polycomponent oil smoke concentration quantitative analysis method.
Embodiment
Be described further below in conjunction with the enforcement of accompanying drawing, but enforcement of the utility model and protection domain are not limited thereto the utility model.
Shown in accompanying drawing 1, a kind of polycomponent oil smoke concentration quantitative test pick-up unit comprises tracheae housing 1; Oil smoke air intake opening 2, oil smoke gas outlet 3, the first quartz glass plates 4; Second quartz glass plate 5, concave surface condenser 6, infrared light supply 7; Pyroelectric detector 8, optical filter 9, signal processing circuit 10 and pyroelectric detector output pin 11.
Four infrared light supplies 7 are installed in an end of tracheae housing 1 side by side; Pyroelectric detector 8 is installed in the other end of tracheae housing 1; Four detection channels of pyroelectric detector 8 are installed the optical filter 9 of different wave length respectively, and each infrared light supply 7 is separately over against a detection channels of pyroelectric detector 8; Side in tracheae housing 1 is provided with said first quartz glass plate 4 that infrared light supply 7 and oil smoke are kept apart; Opposite side is provided with second quartz glass plate 5 that pyroelectric detector 8 and oil smoke are kept apart; Thereby prevent that device from being covered by oil smoke, improve serviceable life; Oil smoke air intake opening 2 is positioned at the upper right side of tracheae housing 1, and oil smoke gas outlet 3 is positioned at the lower left of tracheae housing 1, and oil smoke air intake opening 2 and oil smoke gas outlet 3 are between first quartz glass plate 4 and second quartz glass plate 5; Each infrared light supply 7 all is arranged in a concave surface condenser 6, has strengthened the light emitted light intensity, improves the sensitivity that detects; The output terminal pin one 1 of pyroelectric detector is connected with signal processing circuit 10.
Below with wave number 2930cm
-1Corresponding pristane concentration detects and is example, and step is following:
(1) at constant temperature 25
oC, normal atmosphere is depressed, and oil smoke concentration is 0% o'clock, and recording the optical filter wave number is 2930cm
-1Gas survey channel data V
Gas0With reference channel V
Ref0, obtain K
0=V
Gas0/ V
Ref0
(2) use the standard oil smoke of pristane, n-hexadecane, toluene configuration variable concentrations, keep n-hexadecane, toluene concentration constant, change the concentration of pristane, recording wave number is 2930cm
-1Gas survey channel data V
GasWith reference channel V
Ref, calculate its ratio F=V
Gas/ V
Ref
(3) make the concentration C of pristane and the graph of a relation of corresponding ratio F.
(4) according to Lambert-Beer's law and Characteristics of detector, output voltage signal
V Gas ,
V Ref With incident intensity
IMeet following relation:
Definition
can get:
V in the formula
GasAnd V
RefSurvey the output voltage of passage and reference channel for detector gas; I is an incident intensity; R
GasAnd R
RefBe respectively gas and survey the responsiveness of passage and reference channel; C
GasAnd C
RefBe respectively gas and survey the optical filter constant of passage and reference channel; K is the absorption coefficient of gas; L is the length of detector tube; C is a gas concentration to be measured.
It is thus clear that,
FWith concentration
CIndex of coincidence relation in theory, utilize polyfit function among the matlab to simulate the polynomial expression formula of F and C:
C=?W
1*F
5+?W
2*F
4+?W
3*F
3+?W
4*F
2+?W
5*F，
W in the formula
1, W
2, W
3, W
4, W
5Be respectively the fitting coefficient that calculates, C is the material concentration that will measure of institute, and F is the ratio of reference channel voltage and corresponding gas survey channel voltage.Can calculate corresponding wave number material concentration.
(5) in like manner, the material composition that calculates other wave numbers also can use this method, and optical filter centre wavelength is changed, and repeats the step of (1) (2) (3) (4), can draw the material concentration of corresponding wavelength, thereby realizes the quantitative test of oil smoke multicomponent.
Claims (6)
1. polycomponent oil smoke concentration quantitative analysis device is characterized in that comprising signal processing circuit, tracheae housing, oil smoke air intake opening, oil smoke gas outlet, first quartz glass plate, second quartz glass plate, pyroelectric detector and four infrared light supplies; Said four infrared light supplies are installed in an end of tracheae housing side by side; Said pyroelectric detector is installed in the other end of tracheae housing; Four detection channels of pyroelectric detector are installed the optical filter of different wave length respectively, and each infrared light supply is separately over against a detection channels of pyroelectric detector; Side in the tracheae housing is provided with said first quartz glass plate that infrared light supply and oil smoke are kept apart, and opposite side is provided with second quartz glass plate that pyroelectric detector and oil smoke are kept apart; The oil smoke air intake opening is positioned at the upper right side of tracheae housing, and the oil smoke gas outlet is positioned at the lower left of tracheae housing, and oil smoke air intake opening and oil smoke gas outlet are between first quartz glass plate and second quartz glass plate; Each infrared light supply all is arranged in a concave surface condenser; The output terminal of pyroelectric detector is connected with signal processing circuit.
2. according to the said polycomponent oil smoke concentration of claim 1 quantitative analysis device, it is characterized in that said signal processing circuit comprises filtering circuit, amplifying circuit, AD converter and the single-chip microcomputer that connects in order.
3. according to the said polycomponent oil smoke concentration of claim 1 quantitative analysis device, it is characterized in that said pyroelectric detector has following characteristic:
V in the formula
GasAnd V
RefSurvey the output voltage of passage and reference channel for detector gas; I is an incident intensity; R
GasAnd R
RefBe respectively gas and survey the responsiveness of passage and reference channel; C
GasAnd C
RefBe respectively gas and survey the optical filter constant of passage and reference channel; K is the absorption coefficient of gas; L is the length of detector tube; C is a gas concentration to be measured.
4. according to claim 1 or 3 said polycomponent oil smoke concentration quantitative analysis devices, it is characterized in that the reference channel of described pyroelectric detector uses 4.0 μ m optical filters, three gas are surveyed passage and are used corresponding wave number to be 2930cm
-1, 2960cm
-1, 3030cm
-1Optical filter.
5. according to the said polycomponent oil smoke concentration of claim 1 quantitative analysis device, it is characterized in that the central optical axis of the corresponding gas passage of said each infrared light supply and pyroelectric detector is positioned on the same axis.
6. according to each said polycomponent oil smoke concentration quantitative analysis device of claim 1 ~ 5, it is characterized in that said infrared light supply wavelength coverage is 2 μ m ~ 5 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120240135 CN202149879U (en) | 2011-07-08 | 2011-07-08 | Multicomponent oil-smoke concentration quantitative analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120240135 CN202149879U (en) | 2011-07-08 | 2011-07-08 | Multicomponent oil-smoke concentration quantitative analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202149879U true CN202149879U (en) | 2012-02-22 |
Family
ID=45590933
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120240135 Expired - Fee Related CN202149879U (en) | 2011-07-08 | 2011-07-08 | Multicomponent oil-smoke concentration quantitative analyzer |
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288574A (en) * | 2011-07-08 | 2011-12-21 | 华南理工大学 | Device and method for quantitatively analyzing concentration of multi-component oil fume |
| CN103983601A (en) * | 2014-06-04 | 2014-08-13 | 江南大学 | Infrared optical fiber oil fume concentration sensor |
-
2011
- 2011-07-08 CN CN 201120240135 patent/CN202149879U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288574A (en) * | 2011-07-08 | 2011-12-21 | 华南理工大学 | Device and method for quantitatively analyzing concentration of multi-component oil fume |
| CN103983601A (en) * | 2014-06-04 | 2014-08-13 | 江南大学 | Infrared optical fiber oil fume concentration sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20140708 |
|
| EXPY | Termination of patent right or utility model |