Gas analyzer mixed gas concentration detection correction method and system

Abstract

The present application relates to a kind of gas analyzer mixed gas concentration detection correction method and system, the method is according to the concentration range of each gas component of mixed gas measured concentration value establishment, selects the maximum value of the concentration range of each gas component to the standard concentration of mixed gas reference concentration and the gas to be corrected is normalized, and with the reference concentration of mixed gas after normalization as independent variable, with the standard concentration of the gas to be corrected after normalization as dependent variable correction coefficient equation is established, so that the gas to be corrected is compensated and corrected based on standard concentration.The system includes light source, measuring cell, spectrometer, data acquisition module, data analysis module and concentration correction module.The present application can correct the gas concentration value determined by gas analyzer, reduce actual measurement error, and improve the accuracy of gas concentration detection.

Description

TECHNICAL FIELD

[0001] The present application relates to a gas analyzer, in particular to a gas analyzer mixed gas concentration detection correction method and system, belonging to the technical field of environmental detection. BACKGROUND

[0002] The gas analyzer is a device for online monitoring of gas concentration. At present, many gas analyzers use DOAS technology (differential optical absorption spectroscopy algorithm) for concentration detection. The basic principle of DOAS technology is to use the absorption cross section of the gas to be measured to identify the gas, and to inversely calculate the concentration of the gas according to the absorption intensity.

[0003] However, in actual application, temperature change, pressure change, hardware non-ideal and other interference factors will introduce errors. Tests have found that, especially in the mixed gas concentration detection process, the error between the measured gas concentration value and the actual concentration value is large, which greatly affects the accuracy of gas concentration detection. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides a gas analyzer mixed gas concentration detection correction method and system, which corrects the gas concentration value measured by the gas analyzer, reduces the actual measurement error, and improves the accuracy of gas concentration detection.

[0005] The present application discloses a gas analyzer mixed gas concentration detection correction method, comprising the following steps:

[0006] S1, the mixed gas to be detected is introduced into the measuring cell, the gas analyzer obtains the measured concentration value of n kinds of gas components, and the correction concentration range of each gas component is determined according to the measured concentration value;

[0007] S2, m1, m2, …, mn-1 standard concentration values are selected in the correction concentration range of the 1st, 2nd, …, nth gas component of the mixed gas respectively, to form m1*m2*····*mn-1 concentration combination mixed gas; n n

[0008] S3, the m1*m2*····*mn-1 concentration combination mixed gas is introduced into the gas analyzer in turn for ventilation test, to obtain m1*m2*····*mn-1 reference concentration value; n n

[0009] S4, the m1*m2*····*mn-1 reference concentration value is normalized in turn, to obtain m1*m2*····*mn-1 normalized reference concentration value of the mixed gas; n n

[0010] ​​​​​​S5, normalizing m standard concentration values of the i (1≤i≤n)th gas component to be corrected in the mixed gas, to obtain m normalized standard concentration values of the i th gas component to be corrected; i i

[0011] S6, establishing a polynomial fitting equation according to the m1*m2*····*m n th normalized reference concentration value and the m i th normalized standard concentration value of the i th gas component to be corrected, to obtain a fitting coefficient solution;

[0012] S7, establishing a correction parameter equation Y=f(X1,X2,…,X n ) according to the fitting coefficient solution and storing it into the gas analyzer;

[0013] S8, normalizing the measured concentration values of the n gas components in the mixed gas, and performing reverse normalization processing after substituting the normalized measured concentration values into the correction parameter equation, to obtain the compensated and corrected concentration value of the i th gas component to be corrected in the mixed gas.

[0014] Specifically, in step S4, the m1*m2*····*m n th reference concentration value of the mixed gas is normalized, and the steps are as follows:

[0015] The maximum value of the correction concentration range of the first, second, …, and nth gas component in the mixed gas is taken respectively, and the reference concentration values of each gas component in the mixed gas are normalized;

[0016] Specifically, in step S5, the m i th standard concentration value of the i (1≤i≤n)th gas component to be corrected in the mixed gas is normalized, and the steps are as follows:

[0017] The maximum value of the correction concentration range of the i th gas component to be corrected is taken, and the m i th standard concentration value of the gas component to be corrected is normalized in turn;

[0018] Specifically, in step S6, the polynomial fitting steps are as follows:

[0019] The concentration values of the first, second, …, and nth gas component in the m1*m2*····*m n th normalized reference concentration value are taken as independent variables X1, X2, …, X n , and the m i th normalized standard concentration value of the i th gas component to be corrected is repeated m1*…*m i-1 *m i+1 *…*m n ​​Using Y as the dependent variable, a polynomial fitting equation is established.

[0020] Optionally, in step S6, the method for obtaining the fitting coefficient solution includes constructing the fitting polynomial into a system of linear equations Ax = b, and solving the system of linear equations using the least squares method to obtain the solution as follows:

[0021] x=(A′A) -1 A′b.

[0022] Optionally, in step S6, the method for obtaining the fitting coefficient solution includes constructing the fitting polynomial into a linear equation system of Ax = b, and solving the linear equation system using the singular value decomposition method. The singular value decomposition of A is A = USV′, yielding the following solution:

[0023] x = V(S\(U'b)).

[0024] Specifically, the normalization and denormalization processes in step S8 are as follows:

[0025] Take the maximum value of the calibrated concentration range for each of the 1st, 2nd, ..., nth gas components in the mixed gas, and normalize the measured concentration values ​​of each gas component to obtain the normalized measured concentration values ​​of each gas component.

[0026] Will Substituting the corrective parameters into the equation Y = f(X1, X2, ..., X... n ),get Take the maximum value of the correction concentration range of the i-th gas component to be corrected in the mixed gas, and then... Perform inverse normalization to obtain the concentration value of the i-th gas component to be corrected after compensation.

[0027] A gas analyzer mixed gas concentration detection and correction system includes a light source, a measuring cell, a spectrometer, a data acquisition module, a data analysis module, and a concentration correction module. The light emitted by the light source passes through the gas in the measuring cell and is received by the spectrometer. The spectrometer converts the acquired optical signal into a digital signal and sends it to the data acquisition module. The data acquisition module is connected to both the data analysis module and the concentration correction module.

[0028] The data acquisition module is used to collect the measured concentration data of each component of the gas mixture to be tested and the reference concentration data of each component of the reference gas mixture; the data analysis module is used to establish the calibration parameter equation based on the reference concentration value and standard concentration value of each component of the reference gas mixture and store it in the concentration calibration module in advance; the concentration calibration module is used to process and correct the measured concentration values ​​of each component of the gas mixture to be tested; the process of establishing the calibration parameter equation and processing and correcting the measured concentration values ​​of each component of the gas mixture to be tested is carried out according to the steps of the gas analyzer gas mixture concentration detection and calibration method.

[0029] The present application establishes the concentration range of each gas component according to the measured concentration value of the mixed gas, simultaneously selects the maximum value of the concentration range of each gas component to normalize the reference concentration of the mixed gas and the standard concentration of the gas to be corrected, and establishes the correction coefficient equation by taking the normalized reference concentration of the mixed gas as the independent variable and the normalized standard concentration of the gas to be corrected as the dependent variable, so that the gas to be corrected is compensated and corrected based on the standard concentration, thereby effectively reducing the error between the measured gas concentration value and the actual concentration value and improving the accuracy of gas concentration detection. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Method flowchart of the present application;

[0031] Figure 2 Value of parameter A of the linear equation set in the specific embodiment;

[0032] Figure 3 Value of parameter b of the linear equation set in the specific embodiment;

[0033] Figure 4 A schematic diagram of the gas analyzer mixed gas concentration detection correction system provided by the present application. DETAILED DESCRIPTION

[0034] In order to make the present application clearer, the present application will be further described below in combination with the drawings and specific embodiments.

[0035] The specific parameters in the present embodiment are taken as the mixed gas to be measured composed of high-concentration SO2 and low-concentration NO.

[0036] As shown in the drawings, a gas analyzer mixed gas concentration detection correction method comprises the following steps: Figure 1

[0037] S1, the mixed gas to be detected is introduced into the measuring cell, the gas analyzer obtains the measured concentration value of each gas component, and the correction concentration range of each gas component is determined according to the measured concentration value;

[0038] In order to verify the effectiveness of the present method, the present embodiment takes the mixed gas with known concentration of each gas component as the mixed gas to be detected. Specifically, five groups of mixed gas with concentration combination of 8000 SO2 and 600 NO, 8000 SO2 and 400 NO, 8000 SO2 and 300 NO, 8000 SO2 and 200 NO, and 1500 SO2 and 50 NO (unit: mg / m 3 ) are sequentially introduced into the gas analyzer, the gas analyzer obtains the measured concentration of NO in the first group of mixed gas as 504.8 mg / m 3 ​The concentration error was 15.87%. The measured NO concentration in the second group of mixed gases was 344.1 mg / m³, with a concentration error of 13.97%. The measured NO concentration in the third group of mixed gases was 259.60 mg / m³. 3 The concentration error was 13.47%, and the measured NO concentration in the fourth group of mixed gases was 175.0 mg / m³. 3 The concentration error was 12.50%, and the measured NO concentration in the fifth group of mixed gases was 49.0 mg / m³. 3 The concentration error is 2%.

[0039] It is evident that during the detection of a mixture of high-concentration SO2 and low-concentration NO, the measured concentration error of low-concentration NO is relatively large. Therefore, in this embodiment, NO is used as the gas component to be corrected, and based on the concentrations of the aforementioned gas components, the correction concentration range for SO2 is established as [1500, 8000], and the correction concentration range for NO is established as [50, 600] (unit: mg / m³). 3 ).

[0040] S2. Select m1, m2, ..., mn from the calibration concentration ranges of the 1st, 2nd, ..., nth gas components in the mixed gas, respectively. n A number of standard concentration values ​​constitute m1*m2*····*m n A mixture of gases with various concentration combinations;

[0041] In this embodiment, five standard concentration values ​​are selected in the SO2 calibration concentration range: 8000, 5000, 3000, 2000, and 1500; and six standard concentration values ​​are selected in the NO calibration concentration range: 600, 400, 300, 200, 100, and 50. This results in 30 concentration combinations of SO2 and NO mixed gases: (8000, 600), (5000, 600), (3000, 600), (2000, 600), (1500, 600), (8000, 400), (5000, 400), (3000, 400), (2000, 400), (1500, 400). 0), (8000, 300), (5000, 300), (3000, 300), (2000, 300), (1500, 300), (8000, 200), (5000, 200), (3000, 200), (2000, 200), (1500, 200), (8000, 100), (5000, 100), (3000, 100), (2000, 100), (1500, 100), (8000, 50), (5000, 50), (3000, 50), (2000, 50), (1500, 50) (Unit: mg / m³) 3 );

[0042] S3, divide m1*m2*····*m n A mixture of gases with different concentrations is sequentially passed into a gas analyzer for ventilation testing, yielding the mixture m1*m2*...*m n Group reference concentration value;

[0043] In this embodiment, ventilation tests were conducted sequentially on SO2 and NO mixed gases with 30 different concentration combinations to obtain 30 sets of reference concentration values: (8057.4, 504.8), (5044.2, 574.6), (3031.2, 608.1), (2024.9, 616.6), (1520.1, 619.0), (8043.7, 344.1), (5036.7, 385.4), (3028.8, 404.8), (2023.9, 409.7), (1520.1, 411.0), (8024.1, 259.6), (5028.8, 289.0), (3021.4, 302.1), (2018. 2,305.6), (1516.6,306.7), (8002.7,175.0), (5014.1,192.2), (3020.3,200.9), (2024.6,203.3), (1522.6,203.1), (7987.6,88.4), (4999.3,95.6), (3014.3,99.7), (2016.6,100.4), (1517.9,100.5), (7982.9,44.4), (5001.2,46.7), (3009.4,48.5), (2017.3,49.0), (1518.9,49.0) (Unit: mg / m³) 3 ).

[0044] S4, sequentially process the mixed gas m1*m2*...*m n The group reference concentration values ​​were normalized to obtain m1*m2*····*m n Group normalized reference concentration value;

[0045] Specifically, the maximum values ​​of the calibration concentration ranges of the 1st, 2nd, ..., nth gas components in the mixed gas are taken respectively, and the reference concentration values ​​of each gas component in the mixed gas are normalized.

[0046] In this embodiment, the maximum value of the SO2 calibration concentration range, 8000 (unit: mg / m³), is used. 3 The reference concentration values ​​of SO2 in the 30 sets of reference concentration values ​​were normalized, and the maximum value of the NO correction concentration range, 600 (unit: mg / m³), was taken. 3The reference concentration values ​​of NO in the 30 sets of reference concentration values ​​were normalized to obtain the 30 sets of normalized reference concentration values ​​of SO2 and NO mixture: (1.0072, 0.8413), (0.6305, 0.9577), (0.3789, 1.0135), (0.2531, 1.0277), (0.1900, 1.0317), (1.0055, 0.5735), (0.6296, 0.6423), (0.3786, 0.6747), (0.2530, 0.6828), (0.1900, 0.6850), (1.0030, 0.4327), (0.6286, 0.4817), (0.3777, 0.5035), (0.25 23, 0.5093), (0.1896, 0.5112), (1.0003, 0.2917), (0.6268, 0.3203), (0.3775, 0.3348), (0.2531, 0.3388), (0.1903, 0.3385), (0.9985, 0.1473), (0.6249, 0. 1593), (0.3768, 0.1662), (0.2521, 0.1673), (0.1897, 0.1675), (0.9979, 0.0740), (0.6252, 0.0778), (0.3762, 0.0808), (0.2522, 0.0817), (0.1899, 0.0817)

[0047] S5. For the m-th (1≤i≤n) gas component to be corrected in the gas mixture... i The standard concentration values ​​are normalized to obtain the m value of the i-th gas component to be corrected. i A normalized standard concentration value;

[0048] Specifically, the maximum value of the correction concentration range for the i-th gas component to be corrected is taken, and the m values ​​of the gas components to be corrected are sequentially... i The standard concentration values ​​were normalized.

[0049] In this embodiment, the maximum value of the NO correction concentration range, 600 (unit: mg / m³), is used. 3 The six standard concentration values ​​of NO in the SO2 and NO mixture were normalized sequentially to obtain the following six normalized standard concentration values ​​of NO in the SO2 and NO mixture: 1, 0.6667, 0.50000, 0.3333, 0.1667, and 0.0833.

[0050] S6. Based on m1*m2*…*m n The normalized reference concentration value of the group and the m of the i-th gas component to be corrected iThe normalized standard concentration values are used as independent variables X1, X2, …, Xn, and the concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as dependent variables Y, and a polynomial fitting equation is established.

[0051] Specifically, m1*m2*…*m n The concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as independent variables X1, X2, …, Xn, and the concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as dependent variables Y, and a polynomial fitting equation is established. n The concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as independent variables X1, X2, …, Xn, and the concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as dependent variables Y, and a polynomial fitting equation is established. i The concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as independent variables X1, X2, …, Xn, and the concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as dependent variables Y, and a polynomial fitting equation is established. i-1 The concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as independent variables X1, X2, …, Xn, and the concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as dependent variables Y, and a polynomial fitting equation is established. i+1 The concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as independent variables X1, X2, …, Xn, and the concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as dependent variables Y, and a polynomial fitting equation is established. n The concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as independent variables X1, X2, …, Xn, and the concentration values of the first, second, …, nth gas components in the group normalized reference concentration values are used as dependent variables Y, and a polynomial fitting equation is established.

[0052] The method for obtaining the fitting coefficient solution includes constructing the fitting polynomial as a linear equation group of Ax=b, and solving the linear equation group by the least square method to obtain the solution as follows:

[0053] x=(A′A) -1 A′b.

[0054] The singular value decomposition method can also be used to solve the linear equation group, and A is singular value decomposed as A=USV′, and the solution is as follows:

[0055] x=V(S\(U'b)).

[0056] The steps of establishing the polynomial fitting equation and obtaining the fitting coefficient solution in the embodiment are as follows:

[0057] First step, take 30 groups of SO2 normalized reference concentration values [1.0072, 0.6305, 0.3789, 0.2531, 0.1900, 1.0055, 0.6296, 0.3786, 0.2530, 0.1900, 1.0030, 0.6286, 0.3777, 0.2523, 0.1896, 1.0003, 0.6286, 0.3775, 0.2531, 0.1903, 0.9985, 0.6249, 0.3768, 0.2521, 0.1897, 0.9979, 0.6252, 0.3762, 0.2522, 0.1899] as independent variables X1, and 30 groups of NO normalized reference concentration values [0.8413, 0.9577, 1.0135, 1.0277, 1.0317, 0.5735, 0.6423, 0.6747, 0.6828, 0.6850, 0.4327, 0.4817, 0.5035, 0.5093, 0.5112, 0.2917, 0.3203, 0.3348, 0.3388, 0.3385, 0.1473, 0.1593, 0.1662, 0.1673, 0.1675, 0.0740, 0.0778, 0.0808, 0.0817, 0.0817] as independent variables X2;

[0058] Second step, take 6 standard concentration values of NO after normalization: 1, 0.6667, 0.50000, 0.3333, 0.1667, 0.0833 each repeated 5 times to form dependent variable Y = [1, 1, 1, 1, 1, 0.6667, 0.6667, 0.6667, 0.6667, 0.6667, 0.5000, 0.5000, 0.5000,

[0059] 0.5000, 0.5000, 0.3333, 0.3333, 0.3333, 0.3333, 0.3333, 0.1667, 0.1667, 0.1667, 0.1667, 0.1667, 0.0833, 0.0833, 0.0833, 0.0833, 0.0833],

[0060] Third step, fit the polynomial as follows:

[0061] Y = a 00 +a 10 X1+a 01 X2+a 20 X1 2 +a 11 X1X2+a 02 X2 2 +a 21 X1 2X2+a 12 X1X2 2 +a 22 X1 2 X2 2 ;

[0062] Fourth step, the fitting polynomial is constructed as Ax=b linear equation system form, A 30×9 , b 30×1 As shown in Figure 2 and Figure 3 ;

[0063] Fifth step, solving the linear equation system A 30×9 x 9×1 =b 30×1 , the fitting coefficient solution is obtained, the method is as follows:

[0064] The linear equation system is solved by least square method, and the solution is as follows:

[0065] x=(A′A) -1 A′b.

[0066] The singular value decomposition method is used to solve the linear equation system, and the singular value decomposition A=USV′ is performed on A, and the solution is as follows:

[0067] x=V(S\(U'b)).

[0068] The fitting coefficient solution is obtained as follows:

[0069] x=[0.0401,-0.1452,0.8259,0.1102,0.5709,0.1138,-0.3019,-0.5340,0.5203] T , that is, a 00 =0.0401, a 10 =-0.1452, a 01 =0.8259, a 20 =0.1102, a 11 =0.5709, a 02 =0.1138, a 21 =-0.3019, a 12 =-0.5340, a 22 =0.5203.

[0070] S7, according to the fitting coefficient solution, a correction parameter equation Y=f(X1,X2,…,X n ) is established and stored in the gas analyzer;

[0071] In this embodiment, the correction parameter equation established according to the above fitting coefficient solution is as follows:

[0072] f(X1,X2)

[0073] =0.0401-0.1452X1+0.8259X2+0.1102X1 2 +0.5709X1X2+0.1138X2 2 -0.3019X1 2 X2-0.5340X1X2 2 +0.5203X1 2 X2 2 .

[0074] S8. Normalize the measured concentration values ​​of the n gas components in the mixed gas, and then substitute the normalized measured concentration values ​​into the correction parameter equation and perform inverse normalization to obtain the corrected concentration value of the i-th gas component to be corrected in the mixed gas.

[0075] Specifically, the maximum values ​​of the calibrated concentration ranges for the 1st, 2nd, ..., nth gas components in the mixed gas are taken respectively, and the measured concentration values ​​of each gas component are normalized to obtain the normalized measured concentration values ​​of each gas component.

[0076] Will Substituting the corrective parameters into the equation Y = f(X1, X2, ..., X... n ),get Take the maximum value of the correction concentration range of the i-th gas component to be corrected in the mixed gas, and then... Perform inverse normalization to obtain the concentration value of the i-th gas component to be corrected after compensation.

[0077] In this embodiment, the first step is to take the maximum value of the calibration concentration range of the high-concentration gaseous component SO2, which is 8000 mg / m³. 3 The measured concentrations of SO2, a high-concentration gaseous component in the gas mixture to be tested, [8057.4, 8043.7, 8024.1, 8002.7, 1518.9] were normalized to obtain the following values: The maximum corrected concentration range for the low-concentration gaseous component NO is set at 600 mg / m³. 3 The measured concentrations of NO, a low-concentration gaseous component, in the gas mixture to be tested were normalized to obtain the following values: [504.8, 344.1, 259.6, 175.0, 49.0].

[0078] The second step is to normalize the concentration values ​​of each gas component. Substituting into the correction parameter equation, we get The maximum corrected concentration range for the low-concentration gaseous component NO is set at 600 mg / m³. 3 Inverse normalization processing The compensated and corrected concentration values of each gas component in the mixed gas to be detected are obtained as follows:

[0079] The SO 2、 The measured concentrations of NO in the mixed gas to be detected are 504.8, 344.1, 259.6, 175.0, and 49.0 (unit: mg / m 3 ) respectively, and the compensated and corrected concentrations are 599.7, 401.2, 299.5, 199.7, and 49.3 (unit: mg / m 3 ) respectively, the standard concentrations are 600, 400, 300, 200, and 50 (unit: mg / m 3 ) respectively, and the concentration errors are reduced from 15.87%, 13.97%, 13.47%, 12.50%, and 2.00% to 0.05%, 0.30%, 0.17%, 0.15%, and 1.40% respectively.

[0080] It can be seen that, by compensating and correcting the measured concentrations of the mixed gas according to the method, the gas components with large concentration measurement deviations in the mixed gas are corrected, and the accuracy of the mixed gas concentration detection is improved.

[0081] As shown in Figure 4 , a mixed gas concentration detection correction system of a gas analyzer includes a light source, a measuring cell, a spectrometer, a data acquisition module, a data analysis module, and a concentration correction module. The light emitted by the light source passes through the gas in the measuring cell and is received by the spectrometer. The spectrometer converts the collected optical signals into digital signals and sends them to the data acquisition module. The data acquisition module is connected to the data analysis module and the concentration correction module respectively.

[0082] The data acquisition module is used to collect the measured concentration data of each component of the mixed gas to be detected and the reference concentration data of each component of the reference mixed gas. The data analysis module is used to establish a correction parameter equation according to the reference concentration values and the standard concentration values of each component of the reference mixed gas and pre-store it in the concentration correction module. The concentration correction module is used to process and correct the measured concentration values of each component of the mixed gas to be detected. The process of establishing a correction parameter equation and processing and correcting the measured concentration values of each component of the mixed gas to be detected is operated according to the steps of the mixed gas concentration detection correction method of the gas analyzer.

[0083] A non-transitory computer-readable storage medium includes instructions for executing the mixed gas concentration detection correction method of the gas analyzer according to any of the above embodiments.

[0084] An electronic device includes a non-transitory computer-readable storage medium and one or more processors capable of executing the instructions of the non-transitory computer-readable storage medium.

[0085] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In a software embodiment, the methods can be tangibly embodied in a machine-readable storage medium having stored thereon instructions that can be used to program a computer to perform any of the methods. The software implementation can be initialized by loading and executing a set of instructions arranged to perform one of the methods into the computer's memory. Alternatively, hard-wired circuitry can be used in place of, or in combination with, software instructions. Thus, the

[0086] The present application is described in relation to flow diagrams and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It is understood that each block of the flow diagrams and / or block diagrams, and combinations of blocks in the flow diagrams and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks. Figure 1 one or more functions specified in one or more of the flow diagram or block diagram block or blocks. Figure 1 means for performing one or more of the functions specified in one or more of the flow diagram or block diagram block or blocks.

[0087] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the flow diagram and / or block diagram block or blocks. Figure 1 one or more functions specified in one or more of the flow diagram or block diagram block or blocks. Figure 1 means for performing one or more of the functions specified in one or more of the flow diagram or block diagram block or blocks.

[0088] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flow diagram and / or block diagram block or blocks. Figure 1 one or more functions specified in one or more of the flow diagram or block diagram block or blocks. Figure 1 means for performing one or more of the functions specified in one or more of the flow diagram or block diagram block or blocks.

[0089] The principles and implementation modes of the present application are described in the specific embodiments. The above embodiments are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation modes and application ranges can be changed; in conclusion, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A gas analyzer mixed gas concentration detection correction method characterized by, The method comprises the following steps: S1, the mixed gas to be detected is introduced into a measuring cell, and a gas analyzer obtains A measured concentration value of a gas component, and a correction concentration range of each gas component is determined according to the measured concentration value; S2, respectively in the mixed gas The standard concentration value is selected in the correction concentration range of the gas component The mixed gas of the concentration combination is composed of The standard concentration value is selected in the correction concentration range of the gas component S3, will A mixture of gases with different concentration combinations was sequentially passed into a gas analyzer for ventilation testing to obtain... Group reference concentration value; S4, respectively taking the mixed gas first The maximum value of the correction concentration range of the gas component is obtained, and the mixed gas The reference concentration value of the mixed gas is normalized to obtain a set of normalized reference concentration values of the mixed gas. The reference concentration value of the mixed gas is normalized to obtain a set of normalized reference concentration values of the mixed gas. S5、take the first The maximum value of the correction concentration range of the gas component to be corrected is normalized to the standard concentration value of the first The maximum value of the correction concentration range of the gas component to be corrected is normalized to the standard concentration value of the first The maximum value of the correction concentration range of the gas component to be corrected is normalized to the standard concentration value of the first The maximum value of the correction concentration range of the gas component to be corrected is normalized to the standard concentration value of the first The maximum value of the correction concentration range of the gas component to be corrected is normalized to the standard concentration value of the first S6、According to a group normalization reference concentration value and the first a group of to-be-corrected gas components a group of normalized standard concentration values, a polynomial fitting equation is established to obtain a fitting coefficient solution; S7、According to the fitting coefficient solution, establish the correction parameter equation and stored into the gas analyzer; S8. Normalize the measured concentrations of the n gas components in the mixed gas, then substitute the normalized measured concentrations into the correction parameter equation and perform inverse normalization to obtain the nth concentration in the mixed gas. The concentration values ​​of the gas components to be corrected after compensation and correction.

2. The gas analyzer mixed gas concentration detection correction method according to claim 1, wherein In step S6, the polynomial fitting step is as follows: respectively The first group of normalized reference concentration values The concentration values ​​of the gas components are independent variables. , with the first The gas components to be corrected Each normalized standard concentration value was repeated. This is the dependent variable. A polynomial fitting equation is established to obtain the fitting coefficient solution.

3. The gas analyzer mixed gas concentration detection correction method according to claim 2, wherein In step S6, the method for obtaining the solution of the fitting coefficients comprises constructing the fitting polynomial as a linear equation set, and solving the linear equation set by the least square method to obtain the solution as follows: 。 4. The gas analyzer mixed gas concentration detection and correction method as described in claim 2, characterized in that, In step S6, the method for obtaining the fitting coefficient solution includes constructing the fitting polynomial as follows: The linear equation system is solved using the singular value decomposition method. Perform singular value decomposition The solution is as follows: 。 5. The gas analyzer mixed gas concentration detection correction method according to claim 4, wherein In step S8, the normalization and reverse normalization processing step is as follows: The measured concentration values of the gas components are normalized by taking the maximum value of the correction concentration range of the mixed gas ;​ Will Substitute into the correction parameter equation ,get Take the first mixed gas The maximum value of the correction concentration range for the gas component to be corrected, for Perform inverse normalization to obtain the first... The concentration values ​​of the gas components to be corrected after compensation and correction.

6. A gas analyzer mixed gas concentration detection correction system, using the method of any one of claims 1 to 5, comprising a light source, a measuring cell, a spectrometer, a data acquisition module and a data analysis module, characterized in that, The concentration correction module is also included, the light emitted by the light source passes through the gas in the measuring cell and is received by the spectrometer, the spectrometer converts the collected optical signal into a digital signal and sends it to the data acquisition module, the data acquisition module is connected with the data analysis module and the concentration correction module respectively; The data acquisition module is used for collecting the measured concentration data of each component of the mixed gas to be detected and the reference concentration data of each component of the reference mixed gas; the data analysis module is used for establishing a correction parameter equation according to the reference concentration values and the standard concentration values of each component of the reference mixed gas and pre-storing the correction parameter equation in the concentration correction module; the concentration correction module is used for processing and correcting the measured concentration values of each component of the mixed gas to be detected; the process of establishing the correction parameter equation and processing and correcting the measured concentration values of each component of the mixed gas to be detected is operated according to the gas analyzer mixed gas concentration detection correction method steps of any one of claims 1 to 5.

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