CN112945876B - Method for generating gas vector to be measured - Google Patents
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- CN112945876B CN112945876B CN202110124815.0A CN202110124815A CN112945876B CN 112945876 B CN112945876 B CN 112945876B CN 202110124815 A CN202110124815 A CN 202110124815A CN 112945876 B CN112945876 B CN 112945876B
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- 239000013598 vector Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000002835 absorbance Methods 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000001228 spectrum Methods 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000003595 spectral effect Effects 0.000 claims 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 20
- 230000007613 environmental effect Effects 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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Abstract
The invention provides a method for generating a gas vector to be measured, which comprises the following steps ofThe steps are as follows: (A1) Inputting the parameters of the gas to be measured and the system parameters in a spectrum standard database; (A2) Output is respectively connected with the concentration C of the gas to be measured 1 ，C 2 ···C n‑1 ，C n Absorbance A of one-to-one correspondence 1 ，A 2 ···A n‑1 ，A n The method comprises the steps of carrying out a first treatment on the surface of the (A3) The concentration C is respectively introduced into the gas detection system 1 、C n Respectively obtaining and concentration C of the gas to be tested 1 、C n Absorbance V of one-to-one correspondence 1 、V n The method comprises the steps of carrying out a first treatment on the surface of the (A4) According to absorbance A 1 、A n Absorbance V 1 、V n Obtaining coefficients(A5) According to the coefficient and absorbance A 2 ，A 3 ···A n‑1 Obtaining the concentration C respectively 2 ···C n‑1 Absorbance V of one-to-one correspondence 2 ，V 3 ···V n‑1 The method comprises the steps of carrying out a first treatment on the surface of the (A6) According to absorbance V 1 ，V 2 ，V 3 ···V n‑1 ，V n Concentration C 1 ，C 2 ···C n Fitting the gas vector to be measured. The invention has the advantages of simplicity, high efficiency and the like.
Description
Technical Field
The invention relates to gas detection, in particular to a method for generating a gas vector to be detected.
Background
Environmental monitoring is an environmental protection basic work and is a technical basis for environmental law enforcement supervision. The monitoring data can be used as legal basis for environmental law enforcement supervision, and the technical level plays a vital role in grasping the current pollution state and predicting the development trend.
The most widely used gaseous pollutant monitoring systems at present are all based on photoelectric detection technology, and according to the characteristic absorption spectrum of the detected component, the detected pollutant can be accurately distinguished, and the concentration information of the detected pollutant can be calculated according to the beer's law.
In order to accurately calculate the concentration of the gas to be measured, a correspondence relationship between the response of the analysis instrument and the concentration of the gas to be measured, that is, vector generation, needs to be established.
The current vector generation method mainly depends on introducing gas to be detected with stepped concentration, recording corresponding absorbance, and establishing a corresponding relation between absorbance and concentration through a reasonable algorithm. In order to improve the fitting accuracy, absorbance information of 6 or more concentration points needs to be acquired, and in addition, vectors need to be reestablished between different analyzers due to the difference between initial light intensity and a system transfer function, so that the workload is high.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a method for generating a gas vector to be detected.
The invention aims at realizing the following technical scheme:
the method for generating the gas vector to be detected comprises the following steps:
(A1) Inputting parameters of gas to be measured in a spectrum standard database, wherein the parameters of gas to be measured comprise temperature, pressure, optical path and concentration C 1 ，C 2 ···C n Concentration C 1 ，C 2 ···C n In increasing increments, C 1 ＝0，C n For full scale concentration, n is an integer greater than 3;
(A2) Output is respectively with the concentration C 1 ，C 2 ···C n-1 ，C n Absorbance A of one-to-one correspondence 1 ，A 2 ···A n-1 ，A n ；
(A3) The concentration C is respectively introduced into the gas detection system 1 、C n Respectively to be measured of (1)Obtaining and concentration C 1 、C n Absorbance V of one-to-one correspondence 1 、V n ；
(A4) According to absorbance A 1 、A n Absorbance V 1 、V n Obtaining coefficients
(A5) According to the coefficient and absorbance A 2 ，A 3 ···A n-1 Obtaining the concentration C respectively 2 ···C n-1 Absorbance V of one-to-one correspondence 2 ，V 3 ···V n-1 ；
(A6) According to absorbance V 1 ，V 2 ，V 3 ···V n-1 ，V n Concentration C 1 ，C 2 ···C n Fitting the gas vector to be measured.
Compared with the prior art, the invention has the following beneficial effects:
1. the establishment of the vector of the gas to be detected only needs to determine the absorbance of the zero point and the full-scale point of the system, so that the vector establishment flow is simplified;
2. the vector establishment time is shortened, the influence of environmental factors such as temperature, vibration and the like in the vector establishment process can be effectively reduced, and the vector accuracy is improved;
3. only zero gas and full-scale gas are introduced into the detection system, so that errors caused by flow control when the gas distribution instrument generates different concentrations of gas to be detected are reduced;
4. the production efficiency of the gas analyzer based on the spectrum absorption principle is improved, and particularly the analyzer for simultaneously measuring a plurality of gas components is improved.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are only for illustrating the technical scheme of the present invention and are not intended to limit the scope of the present invention. In the figure:
fig. 1 is a flowchart of a method of generating a vector of a gas to be measured according to embodiment 1 of the present invention.
Detailed Description
Fig. 1 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. For the purpose of explaining the technical solution of the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations or alternatives derived from these embodiments that fall within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Thus, the invention is not limited to the following alternative embodiments, but only by the claims and their equivalents.
Example 1:
fig. 1 schematically shows a flowchart of a method for generating a gas vector to be measured according to an embodiment of the present invention, as shown in fig. 1, the method for generating a gas vector to be measured includes the following steps:
(A1) Inputting parameters of gas to be measured in a spectrum standard database, wherein the parameters of gas to be measured comprise temperature, pressure, optical path and concentration C 1 ，C 2 ···C n Concentration C 1 ，C 2 ···C n In increasing increments, C 1 ＝0，C n For full scale concentration, n is an integer greater than 3;
(A2) Output is respectively with the concentration C 1 ，C 2 ···C n-1 ，C n Absorbance A of one-to-one correspondence 1 ，A 2 ···A n-1 ，A n ；
(A3) The concentration C is respectively introduced into the gas detection system 1 、C n Respectively obtaining and concentration C of the gas to be tested 1 、C n Absorbance V of one-to-one correspondence 1 、V n ；
(A4) According to absorbance A 1 、A n Absorbance V 1 、V n Obtaining coefficients
(A5) According to the coefficient and absorbance A 2 ，A 3 ···A n-1 Obtaining the concentration C respectively 2 ···C n-1 Absorbance V of one-to-one correspondence 2 ，V 3 ···V n-1 ；
(A6) According to absorbance V 1 ，V 2 ，V 3 ···V n-1 ，V n Concentration C 1 ，C 2 ···C n Fitting the gas vector to be measured.
In order to improve the accuracy of absorbance, further, absorbance V 2 ，V 3 ···V n-1 The obtaining mode of the (2) is as follows:
V i+1 ＝V i +K·(A i+1 -A i )，i＝1,2···(n-2)。
in order to improve the accuracy of the vector, in step (A6), the vector of the gas to be measured is:
C＝B+D·V+F·V 2 c is the concentration of the gas to be measured, B, D, F are coefficients, respectively, and V is absorbance.
In order to improve the accuracy of the absorbance output by the spectrum standard database, further, in step (A1), system parameters are input into the spectrum standard database, wherein the system parameters comprise the start and stop wavelengths of the optical filter device adopted by the system.
Example 2:
application example of the method for generating a vector of a gas to be measured according to embodiment 1 of the present invention.
In this application example, the method for generating the gas vector to be measured includes the following steps:
(A1) Inputting sulfur dioxide gas parameters and system parameters in a spectrum standard database, wherein the sulfur dioxide parameters comprise temperature, pressure, optical path and concentration C 1 ，C 2 ···C 6 Concentration C 1 ，C 2 ···C 6 Gradient increasing, C 1 ＝0，C 6 For the concentration of full scale range, C 2 ＝0.2C 6 、C 3 ＝0.4C 6 、C 4 ＝0.6C 6 、C 5 ＝0.8C 6 The method comprises the steps of carrying out a first treatment on the surface of the The system parameters include the initiation and interception of the filter element employed by the systemStopping wavelength;
(A2) Output is respectively with the concentration C 1 ，C 2 ···C 5 ，C 6 Absorbance A of one-to-one correspondence 1 ，A 2 ···A 5 ，A 6 As shown in table 1 below;
| SO 2 concentration of | C 1 | C 2 | C 3 | C 4 | C 5 | C 6 |
| Absorbance A | 0 | 0.0188 | 0.0376 | 0.0562 | 0.0749 | 0.0934 |
(A3) The concentration C is respectively introduced into the gas detection system 1 、C 6 Sulfur dioxide of (C) respectively obtain and concentration C 1 、C 6 Absorbance V of one-to-one correspondence 1 、V 6 ；
(A4) According to absorbance A 1 、A 6 Absorbance V 1 、V 6 Obtaining coefficients
(A5) According to the coefficient and absorbance A 2 ，A 3 ···A 5 Obtaining the concentration C respectively 2 ···C 5 Absorbance V of one-to-one correspondence 2 ，V 3 ···V 5 As shown in table 2 below;
(A6) According to absorbance V 1 ，V 2 ，V 3 ···V 5 ，V 6 Concentration C 1 ，C 2 ···C 6 Fitting the sulfur dioxide vector:
C＝-264.33729+439.80789·V+39.74759·V 2 。
comparing the concentration C with the above mode 1 ，C 2 ···C 6 Sulfur dioxide gas is introduced into the detection system, and the data obtained in practice are shown in table 3 below:
example 3:
application example of the method for generating a vector of a gas to be measured according to embodiment 1 of the present invention.
In this application example, the method for generating the gas vector to be measured includes the following steps:
(A1) Inputting sulfur dioxide gas parameters and system parameters in a spectrum standard database, wherein the sulfur dioxide parameters comprise temperature, pressure, optical path and concentration C 1 ，C 2 ···C 6 Concentration C 1 ，C 2 ···C 6 Gradient increasing, C 1 ＝0，C 6 For the concentration of full scale range, C 2 ＝0.2C 6 、C 3 ＝0.4C 6 、C 4 ＝0.6C 6 、C 5 ＝0.8C 6 The method comprises the steps of carrying out a first treatment on the surface of the The system parameters comprise the starting wavelength and the cut-off wavelength of a light filtering device adopted by the system;
(A2) Output is respectively with the concentration C 1 ，C 2 ···C 5 ，C 6 Absorbance A of one-to-one correspondence 1 ，A 2 ···A 5 ，A 6 ；
(A3) The concentration C is respectively introduced into the gas detection system 1 、C 6 Sulfur dioxide of (C) respectively obtain and concentration C 1 、C 6 Absorbance V of one-to-one correspondence 1 、V 6 ；
(A4) According to absorbance A 1 、A 6 Absorbance V 1 、V 6 Obtaining coefficients
(A5) According to the coefficient and absorbance A 2 ，A 3 ···A 5 Obtaining the concentration C respectively 2 ···C 5 Absorbance V of one-to-one correspondence 2 ，V 3 ···V 5 As shown in table 4 below;
(A6) According to absorbance V 1 ，V 2 ，V 3 ···V 5 ，V 6 Concentration C 1 ，C 2 ···C 6 Fitting the sulfur dioxide vector:
C＝-533.64649+1322.78161·V-289.48468·V 2 。
comparing the concentration C with the above mode 1 ，C 2 ···C 6 Sulfur dioxide gas is introduced into the detection system, and the data obtained in practice are shown in table 5 below:
Claims (3)
1. the method for generating the gas vector to be detected comprises the following steps:
(A1) Inputting parameters of gas to be measured in a spectrum standard database, wherein the parameters of gas to be measured comprise temperature, pressure, optical path and concentration C 1 ，C 2 …C n Concentration C 1 ，C 2 …C n Gradient increasing, C 1 =0， C n For full scale concentration, n is an integer greater than 3;
(A2) Output is respectively with the concentration C 1 ，C 2 …C n-1 ，C n 1. A corresponding absorbance A 1 ，A 2 …A n-1 ，A n ；
(A3) The concentration C is respectively introduced into the gas detection system 1 、C n Respectively obtaining and concentration C of the gas to be tested 1 、C n 1. A corresponding absorbance V 1 、V n ；
(A4) According to absorbance A 1 、A n Absorbance V 1 、V n Obtaining coefficients；
(A5) According to the coefficient and absorbance A 2 ，A 3 …A n-1 Obtaining the concentration C respectively 2 …C n-1 1. A corresponding absorbance V 2 ，V 3 …V n-1 The method comprises the steps of carrying out a first treatment on the surface of the Absorbance V 2 ，V 3 …V n-1 The obtaining mode of the (2) is as follows:
V i+1 =V i +K(A i+1 - A i )，i=1,2…(n-2)；
(A6) According to absorbance V 1 ，V 2 ，V 3 …V n-1 ，V n Concentration C 1 ，C 2 …C n Fitting out the gas vector to be measured，C=B+D·V+F·V 2 C is the concentration of the gas to be measured, B, D, F is the coefficient, and V is the absorbance.
2. The method of generating a vector of gas to be measured according to claim 1, wherein in step (A1), system parameters including the start and stop wavelengths of the optical filter device employed by the system are input in a spectral standard database.
3. The method of generating a vector of gas to be measured according to claim 1, wherein the spectrum standard database is a Spectroplot.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592261A (en) * | 2013-11-20 | 2014-02-19 | 天津大学 | All-fiber temperature compensating gas sensor and compensating method thereof |
| CN106769974A (en) * | 2016-11-23 | 2017-05-31 | 合肥金星机电科技发展有限公司 | Gas concentration Two dimensional Distribution on-line detecting system and method |
| CN108414461A (en) * | 2018-02-05 | 2018-08-17 | 佛山科学技术学院 | A method of improving silicate component measuring accuracy |
| CN108680523A (en) * | 2018-07-10 | 2018-10-19 | 北京北分瑞利分析仪器(集团)有限责任公司 | It is connected the determinand assay method of standard curve using a variety of fit approach |
| CN109799203A (en) * | 2019-01-26 | 2019-05-24 | 上海交通大学 | A kind of wide-range high-precision spectral method of detection of COD in water body concentration |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102272564B (en) * | 2009-06-12 | 2014-07-16 | 光学传感器公司 | Optical absorbance measurements with self-calibration and extended dynamic range |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592261A (en) * | 2013-11-20 | 2014-02-19 | 天津大学 | All-fiber temperature compensating gas sensor and compensating method thereof |
| CN106769974A (en) * | 2016-11-23 | 2017-05-31 | 合肥金星机电科技发展有限公司 | Gas concentration Two dimensional Distribution on-line detecting system and method |
| CN108414461A (en) * | 2018-02-05 | 2018-08-17 | 佛山科学技术学院 | A method of improving silicate component measuring accuracy |
| CN108680523A (en) * | 2018-07-10 | 2018-10-19 | 北京北分瑞利分析仪器(集团)有限责任公司 | It is connected the determinand assay method of standard curve using a variety of fit approach |
| CN109799203A (en) * | 2019-01-26 | 2019-05-24 | 上海交通大学 | A kind of wide-range high-precision spectral method of detection of COD in water body concentration |
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