CN115691692A - Performance evaluation method and system of sulfur compound analyzer and storage medium - Google Patents
Performance evaluation method and system of sulfur compound analyzer and storage medium Download PDFInfo
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Abstract
The invention relates to a performance evaluation method, a system and a storage medium of a sulfide analyzer, which comprises the steps of obtaining the type of a measuring method adopted by the sulfide analyzer to be evaluated, and determining an evaluation index set corresponding to the sulfide analyzer to be evaluated according to the type of the measuring method; setting the optimal test condition of the sulfide analyzer to be evaluated under the type of the determination method, determining a sample by adopting the sulfide analyzer to be evaluated according to the optimal test condition and the type of the determination method, and calculating an actual index value sequence corresponding to each evaluation index in the evaluation index set in the determination process; and analyzing the actual index value sequences of all the evaluation indexes based on a grey correlation analysis method to obtain the performance grade corresponding to the sulfide analyzer to be evaluated. The invention can carry out multi-index comprehensive performance evaluation according to different types of sulfide analyzers, and can accurately evaluate the products and performance level standards of the sulfide analyzers.
Description
Technical Field
The invention relates to the field of evaluation standards of sulfide analyzers, in particular to a performance evaluation method, a performance evaluation system and a storage medium of a sulfur compound analyzer.
Background
The sulfide is a compound formed by metal ions and sulfhydryl ions, the compound is easy to escape from water into the air to generate odor, has high toxicity, can act with cytochrome, oxidase in a human body and disulfide bonds in the compound to influence the oxidation process of cells, causes oxygen deficiency of cell tissues and endangers the life of the human body. When the sulfide in the sewage is too high, the cell structure of microorganisms in the activated sludge is damaged and enzymes in the bacteria deteriorate, so that the activity of the microorganisms is inhibited and poisoned; on the other hand, too high sulfide concentration can cause filamentous sulfur bacteria, which causes sludge bulking, and the sedimentation performance is reduced, resulting in sludge loss. The total sulfur mostly exists in natural gas and petroleum, and is mainly embodied in the damage to human bodies and the corrosion to metal equipment, so that non-metal elements and equipment are aged; indirectly damage the environment and produce toxic and side effects on organisms. Therefore, the method has important significance for the determination of sulfide and total sulfur.
At present, the total sulfur determination methods used at home and abroad are more, and the main technical route thereof is to convert sulfur in various forms into sulfides and then determine the converted sulfides, so the essence of the determination of the total sulfur is to determine the sulfides, and instruments for measuring and analyzing the sulfides and the total sulfur are collectively called sulfide analyzers. The sulfide analyzer generally measures hydrogen sulfide by using an ultraviolet absorption method, a laser absorption method and a chromatography method, and measures total sulfur by using an ultraviolet fluorescence method and a chromatography method.
However, there is currently no comprehensive evaluation and product level criteria for sulfide analyzers. Therefore, the quality of sulfide analyzers in the market is uneven, and certain influence is caused on the popularization and application of the sulfide analyzers. Therefore, a method and a system for evaluating the performance of the sulfide analyzer are needed to be established, so that the sulfide analyzer is easy to popularize and widely applied.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method, a system and a storage medium for evaluating the performance of a sulfide analyzer, which can carry out multi-index comprehensive performance evaluation according to different types of sulfide analyzers, can accurately evaluate the product and performance level standard of the sulfide analyzer, ensure the quality of the sulfide analyzer in the market and help realize the application value of the sulfide analyzer
The invention is realized by the following technical scheme:
a performance evaluation method of a sulfide analyzer comprises the following steps:
obtaining the type of a measuring method adopted by a sulfide analyzer to be evaluated, and determining an evaluation index set corresponding to the sulfide analyzer to be evaluated according to the type of the measuring method;
setting the optimal test condition of the sulfide analyzer to be evaluated under the type of the determination method, determining a sample by adopting the sulfide analyzer to be evaluated according to the optimal test condition and the type of the determination method, and calculating an actual index value sequence corresponding to each evaluation index in the evaluation index set in the determination process;
and analyzing the actual index value sequences of all the evaluation indexes based on a grey correlation analysis method to obtain the performance grade corresponding to the sulfide analyzer to be evaluated.
According to another aspect of the invention, the invention also provides a performance evaluation system of the sulfide analyzer, which is applied to the performance evaluation method of the sulfide analyzer, and comprises an index acquisition module, an index value determination module and an analysis evaluation module;
the index acquisition module is used for acquiring the type of the measuring method adopted by the sulfide analyzer to be evaluated and determining an evaluation index set corresponding to the sulfide analyzer to be evaluated according to the type of the measuring method;
the index value determination module is used for setting the optimal test condition of the sulfide analyzer to be evaluated under the determination method type, determining a sample by using the sulfide analyzer to be evaluated according to the optimal test condition and the determination method type, and calculating an actual index value sequence corresponding to each evaluation index in the evaluation index set in the determination process;
and the analysis and evaluation module is used for analyzing the actual index value sequences of all the evaluation indexes based on a grey correlation analysis method to obtain the performance grade corresponding to the to-be-evaluated sulfide analyzer.
According to another aspect of the present invention, there is provided a performance evaluation system for a sulfide analyzer, comprising a processor, a memory and a computer program stored in the memory and operable on the processor, wherein the computer program is operable to implement the steps of the performance evaluation method for a sulfide analyzer in the present invention.
In accordance with another aspect of the present invention, there is provided a computer storage medium comprising: at least one instruction which when executed performs a step in a method of evaluating the performance of a sulfide analyzer of the present invention.
The invention has the following advantages and beneficial effects:
1. firstly, obtaining the type of a measuring method of a sulfide analyzer to be evaluated, wherein the type of the measuring method corresponds to the working principle of the sulfide analyzer to be evaluated, an evaluation index set which is applicable to the sulfide analyzer to be evaluated and is matched with the working principle can be determined according to the determined type of the measuring method, and performance evaluation can be carried out in a self-adaptive adjustment mode according to the type of the sulfide analyzer, so that comprehensive performance evaluation of sulfide analyzers of different types is realized; then setting an optimal test condition under the type of the determination method, determining the sample by adopting a sulfide analyzer to be evaluated according to the optimal test condition and the type of the determination method, and calculating an actual index value sequence corresponding to each evaluation index in the matched evaluation index set one by one; each actual index value sequence comprises a plurality of actual index values, so that more accurate performance evaluation can be performed based on all the actual index value sequences, and the accuracy of the performance evaluation of the sulfide analyzer to be evaluated is effectively improved; on one hand, a reference index sequence of an optimal standard can be selected according to actual requirements, and the method is suitable for analyzing different types of sulfides; on the other hand, the method is suitable for a small number of evaluation indexes and obtains an accurate evaluation effect;
2. the performance evaluation method, the system and the storage medium of the sulfide analyzer can comprehensively evaluate the performance of various sulfide analyzers of different types, can perform self-adaptive adjustment of performance indexes according to the sulfide analyzers of different types, and are suitable for online instruments for measuring the content of sulfides in gas, such as an ultraviolet absorption method, a laser absorption method, a chromatography method and the like, and online instruments for measuring the total sulfur in gas, such as an ultraviolet fluorescence method, a chromatography method and the like; the accuracy of the comprehensive performance evaluation is high, the realization difficulty of the method is low, the product and performance level standard of the sulfide analyzer can be accurately evaluated, the quality of the sulfide analyzer in the market is ensured, and the application value of the sulfide analyzer is facilitated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic flow chart showing a method for evaluating the performance of a sulfide analyzer according to example 1 of the present invention;
FIG. 2 is a schematic flow chart of obtaining a performance grade corresponding to a sulfide analyzer to be evaluated in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a performance evaluation system of a sulfide analyzer in embodiment 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a method for evaluating performance of a sulfide analyzer, comprising the following steps:
s1: obtaining the type of a measuring method adopted by a sulfide analyzer to be evaluated, and determining an evaluation index set corresponding to the sulfide analyzer to be evaluated according to the type of the measuring method;
s2: setting the optimal test condition of the sulfide analyzer to be evaluated under the type of the determination method, determining a sample by adopting the sulfide analyzer to be evaluated according to the optimal test condition and the type of the determination method, and calculating an actual index value sequence corresponding to each evaluation index in the evaluation index set in the determination process;
s3: and analyzing the actual index value sequences of all the evaluation indexes based on a grey correlation analysis method to obtain the performance grade corresponding to the sulfide analyzer to be evaluated.
Firstly, obtaining the type of a measuring method of a sulfide analyzer to be evaluated, wherein the type of the measuring method corresponds to the working principle of the sulfide analyzer to be evaluated, determining an evaluation index set which is applicable to the sulfide analyzer to be evaluated and is matched with the working principle according to the determined type of the measuring method, and performing self-adaptive adjustment on performance evaluation according to the type of the sulfide analyzer to realize comprehensive performance evaluation on different types of sulfide analyzers; then setting an optimal test condition under the type of the test method, testing the sample by adopting a sulfide analyzer to be evaluated according to the optimal test condition and the type of the test method, and calculating an actual index value sequence corresponding to each evaluation index in a matched evaluation index set one by one; each actual index value sequence comprises a plurality of actual index values, so that more accurate performance evaluation can be performed based on all the actual index value sequences, and the accuracy of the performance evaluation of the sulfide analyzer to be evaluated is effectively improved; on one hand, a reference index sequence of an optimal standard can be selected according to actual requirements, and the method is suitable for analyzing different types of sulfides; on the other hand, the method is suitable for a small number of evaluation indexes and obtains an accurate evaluation effect;
the performance evaluation method of the sulfide analyzer in the embodiment can comprehensively evaluate the performance of various types of sulfide analyzers, can perform self-adaptive adjustment of performance indexes according to the different types of sulfide analyzers, and is suitable for online instruments for measuring the sulfide content in gas, such as an ultraviolet absorption method, a laser absorption method, a chromatography method and the like, and online instruments for measuring the total sulfur in gas, such as an ultraviolet fluorescence method, a chromatography method and the like; the accuracy of comprehensive evaluation of the performance is high, the realization difficulty of the method is low, the product and performance level standard of the sulfide analyzer can be accurately evaluated, the quality of the sulfide analyzer in the market is ensured, and the realization of the application value of the sulfide analyzer is facilitated.
Specifically, the types of measuring methods of common sulfide analyzers include an ultraviolet absorption method, a laser absorption method, a chromatography method, and an ultraviolet fluorescence method. The type of the measuring method can be selected according to actual conditions, and can also be determined according to an instruction manual of a sulfide analyzer to be evaluated. The sulfide analyzer can adopt an ultraviolet absorption method, a laser absorption method and a chromatography method to measure the sulfide content, can adopt an ultraviolet fluorescence method and a chromatography method to measure the total sulfur content, and the sulfide content or the total sulfur content is represented by a concentration value.
Specifically, in S1, the specific implementation of determining the evaluation index set corresponding to the to-be-evaluated sulfide analyzer according to the type of the determination method is as follows:
when the type of the measuring method is specifically an ultraviolet absorption method, a laser absorption method, an ultraviolet fluorescence method or a chromatography method, the evaluation index set corresponding to the sulfide analyzer to be evaluated comprises effectiveness, repeatability, linearity, drift and indication error; when the type of the determination method is specifically chromatography, the evaluation index set corresponding to the sulfide analyzer to be evaluated further comprises a separation degree.
The evaluation index set is convenient for accurately evaluating the comprehensive performance of the sulfide analyzer to be evaluated, and the product standard and the yield quality of the sulfide analyzer to be evaluated are ensured.
Specifically, after the determination method type and the evaluation index set are determined, the optimal test conditions can be set according to the actual measurement environment and the actual application, so that the subsequent sample determination is more real and effective, and each actual index value sequence is ensured to be more in line with the actual situation.
Preferably, in S2, according to the optimal test condition and the type of the measurement method, a sulfide analyzer to be evaluated is used to measure a sample, and an actual index value sequence corresponding to each evaluation index in the evaluation index set in a measurement process is calculated, specifically including the following steps:
when the type of the measuring method is specifically an ultraviolet absorption method, a laser absorption method or an ultraviolet fluorescence method, under the optimal test condition, the sulfide analyzer to be evaluated is adopted to measure a sample, and the actual index value sequences corresponding to the effectiveness, the repeatability, the linearity, the drift and the indication errors in the measuring process one by one are respectively calculated;
when the type of the determination method is specifically chromatography, under the optimal test condition, a sulfide analyzer to be evaluated is adopted to determine a sample, and an actual index value sequence corresponding to effectiveness, repeatability, linearity, drift, indication error and separation degree in the determination process is respectively calculated;
the specific steps of calculating the actual index value sequence corresponding to the effectiveness of the to-be-evaluated sulfide analyzer in the measurement process are as follows:
S2A.1: under the optimal test conditions, a blank sample gas is selected as a sample for n 1 Sub blank test to obtain n 1 A first test result of the secondary blank test; selecting a first standard sample gas higher than the detection limit of the sulfide analysis to be evaluated as a sample for n 1 Sub-response test to obtain n 1 A second test result of the secondary response test;
S2A.2: select the ith 1 First test result and ith of the Secondary blank test 1 Judging the selected first test result according to the second test result of the secondary response test and the preset blank test criterion to obtain the ith test result 1 Judging the selected second test result according to the preset response test criterion to obtain the ith validity value corresponding to the secondary blank test 1 A second validity value corresponding to the secondary response test;
S2A.3: to the ith 1 First validity value and ith corresponding to secondary blank test 1 Carrying out weighted average operation on the second effectiveness value corresponding to the secondary response test to obtain a corresponding effectiveness average value;
S2A.4: traverse the first of each blank testTest results and second test results of each response test to obtain n 1 Mean value of effectiveness according to n 1 And obtaining an actual index value sequence corresponding to the effectiveness of the to-be-evaluated sulfide analyzer by the effectiveness average value.
The effectiveness is divided into a blank test and a response test, wherein the blank test refers to a result obtained by parallel operation by adopting completely the same analysis steps, reagents and dosage except that no sample is added; if the result is within a preset range (namely, the result meets the preset blank test criterion), the instrument is effective, otherwise, the instrument is ineffective; the blank sample gas is typically nitrogen. The response test is to introduce a standard substance higher than the detection limit of the instrument, and the instrument is required to respond to the measured standard substance, wherein if the response is generated (namely, the response meets the preset response test criterion), the instrument is effective, and otherwise, the instrument is ineffective. N obtained by the above two tests based on the first test result of each blank test and the second test result of each response test 1 And obtaining an actual index value sequence corresponding to the effectiveness by the effectiveness mean value, and accurately judging the effectiveness of the sulfide analyzer to be evaluated so as to facilitate subsequent comprehensive evaluation and analysis.
Preferably, the specific steps of calculating the actual index value sequence corresponding to the repeatability of the to-be-evaluated sulfide analyzer in the measurement process are as follows:
S2B.1: under the best test conditions, n is selected 1 Taking second standard sample gases with different given concentration values and lower than the detection limit of the to-be-evaluated sulfide analyzer as samples, and respectively carrying out n on each second standard sample gas 2 Performing repeated repeatability test to obtain that each second standard sample gas is respectively at n 2 Sulfide concentration for secondary repeatability tests;
S2B.2: select the ith 2 The second standard sample gas is respectively at n 2 Calculating the sulfide concentration of the repeatability test to obtain the ith 2 The relative standard deviation of the second standard sample gas;
S2B.3: traversing each second standard sample gas at n 2 Sulfide concentration meter for repeatability testCalculating to obtain n 1 The relative standard deviation of the second standard sample gas; and according to n 1 The relative standard deviation of the second standard sample gas is used as an actual index value sequence corresponding to the repeatability of the to-be-evaluated sulfide analyzer in the measuring process;
calculate the ith 2 The specific formula of the relative standard deviation of the second standard sample gas is as follows:
Reproducibility refers to the closeness (or dispersion) between results obtained from multiple consecutive assays on the same sample under optimal test conditions, and is determined by selecting n 1 Taking second standard sample gas with different given concentration values as samples, and respectively carrying out n on each second standard sample gas 2 The repeated repeatability test can obtain the relatively accurate relative standard deviation of each second standard sample gas on one hand, and on the other hand, the data number in the actual index value sequence corresponding to the effectiveness is convenient to ensure, so that an index data matrix is convenient to construct subsequently, and comprehensive evaluation and analysis are convenient. Wherein the first standard sample gas and the second standard sample gas are both sulfur-containing gases with known concentration values.
Preferably, the specific steps of calculating the actual index value sequence corresponding to the indication error of the to-be-evaluated sulfide analyzer in the measurement process one by one are as follows:
S2C.1: under the optimal test condition, selecting any given concentration value and a second standard sample gas which is lower than the detection limit of the sulfide analyzer to be evaluated as a sample to carry out n 1 Performing secondary error measurement tests to obtain the sulfide concentration of the selected second standard sample gas in each error measurement test;
S2C.2: calculating to obtain the indication error under each error measurement test according to the given concentration value of the selected second standard sample gas and the sulfide concentration of each error measurement test; obtaining an actual index value sequence corresponding to the indication errors of the to-be-evaluated sulfide analyzer in the measuring process according to all the indication errors;
is calculated at the i 3 The specific formula of the indicating value error under the secondary error determination test is as follows:
The indicating error is the error between the concentration of the sulfide detected by the instrument and a given concentration value, and the indicating error can reflect the performance of the instrument to a certain extent, and n is used in the embodiment 1 The secondary error measurement test can obtain an actual index value sequence corresponding to the indication error of the sulfide analyzer to be evaluated in the measurement process, and ensure the actual indexes corresponding to effectiveness and repeatability one by oneThe number of data in the value sequence is the same, so that an index data matrix is conveniently constructed subsequently, and comprehensive evaluation and analysis are facilitated.
Preferably, the specific steps of calculating the linear one-to-one corresponding actual index value sequence of the to-be-evaluated sulfide analyzer in the measurement process are as follows:
s2D.1: under the best test condition, selecting a plurality of second standard sample gases with different given concentration values and lower than the detection limit of the to-be-evaluated sulfide analyzer as samples to perform a linear measurement test, and performing linear fitting according to the given concentration values of the plurality of groups of second standard sample gases and the sulfide concentration values of the plurality of groups of second standard sample gases measured in the linear measurement test to obtain a linear fitting curve;
s2D.2: calculating a linear correlation coefficient according to the linear fitting curve; and repeat the linearity determination test n 1 Then, obtain n 1 And linear correlation coefficients under a secondary linear measurement test are obtained, and an actual index value sequence linearly corresponding to the sulfide analyzer to be evaluated in the measurement process is obtained according to all the linear correlation coefficients.
In an ideal situation, the sulfide concentration measured by the instrument is linearly related to the given concentration value, in this embodiment, a linear measurement test is performed on the plurality of second standard sample gases with different given concentration values, and linear fitting is performed, so that a linear correlation coefficient between the sulfide concentration and the given concentration value can be calculated; according to n 1 The linear correlation coefficient under the sub-linear measurement test obtains an actual index value sequence linearly corresponding to the sulfide analyzer to be evaluated in the measurement process, and the actual performance of the sulfide analyzer to be evaluated can be reflected to a certain extent. The specific method for calculating the linear correlation coefficient according to the linear fitting curve is the prior art, and is not described herein again.
Preferably, the specific steps of calculating the actual index value sequence corresponding to the drift of the to-be-evaluated sulfide analyzer in the measurement process are as follows:
S2E.1: under the best test conditions, n is selected 1 The detection values of different given concentration values are all lower than the detection value of the to-be-evaluated sulfide analyzerThe limited second standard sample gas was used as a sample for stability test, respectively, for the ith 4 Recording initial zero-point reading of the sulfide analyzer to be evaluated in a stability test by using a second standard sample gas with a given concentration value, recording real-time zero-point reading every t minutes, and continuously recording n 3 A second real-time zero reading;
S2E.2: based on initial zero reading and n 3 The sub real-time zero reading is calculated to obtain the ith of the sulfide analyzer to be evaluated 4 The corresponding actual drift under the second standard sample gas with given concentration value;
S2E.3: traverse n 1 Respectively repeating the stability test on the second standard sample gas with the given concentration value to obtain the corresponding actual drift of the to-be-evaluated sulfide analyzer under each second standard sample gas with the given concentration value; obtaining an actual index value sequence corresponding to the drift of the to-be-evaluated sulfide analyzer in the measuring process according to all actual drifts;
calculating the number i of the sulfide analyzer to be evaluated 4 The specific formula of the actual drift corresponding to the second standard sample gas with given concentration value is as follows:
The drift can reflect the stability of the instrument in a period of time, and the actual drift of the sulfide analyzer to be evaluated can be accurately calculated through the stability test, so that an actual index value sequence corresponding to the drift of the sulfide analyzer to be evaluated in the measuring process is obtained, and the accuracy and reliability of the subsequent comprehensive performance evaluation are further effectively improved.
Preferably, when the type of the measuring method is specifically chromatography, the specific steps of calculating the actual index value sequence corresponding to the separation degree of the sulfide analyzer to be evaluated in the measuring process are as follows:
S2F.1: under the optimal test conditions, selecting a second standard sample gas of any given concentration value as a sample for n 1 Performing secondary chromatographic analysis tests to obtain a hydrogen sulfide chromatogram and a sulfur-oxygen-carbon chromatogram in each chromatographic analysis test;
S2F.1: respectively calculating the separation degree between the hydrogen sulfide chromatogram and the sulfur and carbon dioxide chromatogram in each chromatographic analysis test according to the hydrogen sulfide chromatogram and the sulfur and carbon dioxide chromatogram in each chromatographic analysis test; obtaining an actual index value sequence corresponding to the separation degree of the to-be-evaluated sulfide analyzer in the determination process according to the separation degrees between all the hydrogen sulfide chromatographs and the sulfur-oxygen-carbon;
calculate the ith 5 The specific formula of the separation degree between the hydrogen sulfide chromatogram and the sulfur-oxygen-carbon in the secondary chromatographic analysis test is as follows:
When the type of the determination method adopted by the sulfide analyzer to be evaluated is chromatography, the given measurement result contains chromatogram which can embody the chromatographic peak of each sulfide; the separation degree is an index for measuring the mutual interference of sulfides of each component, so that for a chromatographic sulfide analyzer, the separation degree between the hydrogen sulfide chromatogram and the sulfur-oxygen-carbon is calculated through the steps, the comprehensive performance of the analyzer can be reflected to a certain extent, and the accuracy of comprehensive performance evaluation is further improved.
In this embodiment, the number of data in the actual index value sequence corresponding to each evaluation index in the evaluation index set is n 1 N, facilitating subsequent construction of columns 1 The index data matrix of (2).
Specifically, in S2A.2, the selected first test result is judged according to a preset blank test criterion to obtain the ith test result 1 Judging the selected second test result according to the preset response test criterion to obtain the ith validity value corresponding to the secondary blank test 1 The secondary response tests corresponding to the second validity value,the method specifically comprises the following steps:
judging and selecting the ith 1 Whether the first test result of the sub-blank test is less than or equal to 0.6mg/m 3 If yes, then i 1 The first validity value corresponding to the secondary blank test is 1; if not, the corresponding first validity value is 0;
judging and selecting the ith 1 Whether the second test result of the secondary response test indicates response, if yes, the ith test result 1 The second effectiveness value corresponding to the secondary response test is 1; if not, the corresponding second validity value is 0.
For a blank test, the first test result (i.e., the measured sulfide concentration value for a blank sample gas) of the sulfide analyzer to be evaluated should ideally be 0, but due to instrument performance differences and test errors, the first test result may be greater than 0, so if the ith test is performed 1 The first test result of the secondary blank test is less than or equal to 0.6mg/m 3 If the instrument is valid, assigning the corresponding first validity value to be 1, otherwise, assigning to be 0; for the response test, since the first standard sample gas is higher than the detection limit of the instrument, the second test result of the sulfide analyzer to be evaluated cannot give a specific sulfide concentration value, but the instrument needs to respond to the first standard sample gas, that is, if the ith sample gas is higher than the detection limit of the instrument 1 And if the second test result of the secondary response test indicates that the instrument is effective, assigning a corresponding second effectiveness value to be 1, otherwise, assigning the second effectiveness value to be 0. Through the judgment process, the effectiveness of the instrument can be reflected by actual numerical values, and the subsequent calculation process of comprehensive performance evaluation is facilitated.
Preferably, as shown in fig. 2, S3 specifically includes the following steps:
s31: respectively preprocessing the actual index value sequence of each evaluation index to obtain a target index value sequence corresponding to each evaluation index one by one;
s32: respectively taking each target index value sequence as a row of an index data matrix, taking the index number of all evaluation indexes as a column of the index data matrix, and constructing to obtain the index data matrix;
s33: defining a reference index sequence of the sulfide analyzer to be evaluated;
the index data matrix and the expression of the reference index sequence are respectively as follows:
X′ 0 ＝{x′ 0 (1),x′ 0 (2),…,x′ 0 (m)} T ；
wherein the content of the first and second substances,
for the index data matrix, specifically mxn 1 A matrix of (a); m is index number of all evaluation indexes, X' k Is the k column, x 'of the index data matrix' k (1),x′ k (2),…,x′ k (m) are all element values, X 'in the kth column of the metric data matrix' 0 Is the reference index sequence, x' 0 (1),x′ 0 (2),…,x′ 0 (m) are all the element values of the reference index sequence;
s34: taking each column of the index data matrix as a comparison sequence, selecting any one of the comparison sequences, calculating absolute differences between element values corresponding to each evaluation index in the selected comparison sequence and element values corresponding to the evaluation indexes in the reference index sequence one by one, and calculating correlation coefficients between each evaluation index in the selected comparison sequence and the corresponding evaluation index in the reference index sequence according to all the absolute differences;
the specific formula for calculating the correlation coefficient between the yth evaluation index in the kth comparison sequence and the yth evaluation index in the reference index sequence is as follows:
wherein，ζ k (y) is a correlation coefficient, x ', between the y th evaluation indicator in the k comparison sequence and the y th evaluation indicator in the reference indicator sequence' k (y) is the element value of the y-th evaluation indicator in the k-th comparison sequence, x' 0 (y) is the element value, | x 'of the y-th evaluation index in the reference index sequence' 0 (y)-x′ k (y) | is an absolute difference between the element value of the yth evaluation index in the kth comparison sequence and the element value of the yth evaluation index in the reference index sequence, and ρ is a resolution coefficient;
s35: carrying out weighted average operation on the correlation coefficients between all the evaluation indexes in the selected comparison sequence and the corresponding evaluation indexes in the reference index sequence to obtain a correlation sequence between the selected comparison sequence and the reference index sequence;
the specific formula for calculating the correlation sequence between the kth comparison sequence and the reference index sequence is as follows:
wherein r is k For the sequence of the kth comparison and the sequence of the reference index, ω y The weight of the yth evaluation index;
s36: traversing each comparison sequence to obtain an association sequence between each comparison sequence and the reference index sequence; determining the average value of all the correlation sequences as a target correlation sequence corresponding to the index data matrix;
s37: constructing a performance grade set of the to-be-evaluated sulfide analyzer, and grading each performance grade in the performance grade set to obtain a grade grading table corresponding to the to-be-evaluated sulfide analyzer;
s38: and obtaining the performance grade corresponding to the sulfide analyzer to be evaluated according to the target correlation sequence corresponding to the index data matrix and the grade grading table.
By preprocessing the actual index value sequence of each evaluation index, the data in each target index value sequence can be ensured to be under the same standard, and the subsequent calculation process is facilitated; each target index value sequence is respectively used as a row of an index data matrix, the index number of all evaluation indexes is used as a column of the index data matrix, the index data matrix is constructed, the performance of the instrument is conveniently comprehensively analyzed through subsequent matrix-based calculation, and the calculation complexity is low; the defined reference index sequence is a sequence formed by reference index values of a preset optimal standard, and the optimal standard can be set according to an actual situation and can also be a sequence formed by the maximum element value of each row in an index data matrix; by the method for respectively calculating the correlation coefficient between each element in each comparison sequence and each element in the reference index sequence and further calculating the correlation sequence between each comparison sequence and the reference index sequence, the difference and the goodness of fit between each comparison sequence and the reference index sequence can be accurately judged, and the final performance grade of the sulfide analyzer to be evaluated can be conveniently judged according to all the correlation sequences; when the average value of all the correlation sequences is determined as the target correlation sequence corresponding to the index data matrix, a grade grading table is obtained according to the constructed performance grade set and the grade of each performance grade, the performance grade corresponding to the sulfide analyzer to be evaluated can be obtained by searching in the grade grading table according to the target correlation sequence, and the result is accurate and reliable.
Specifically, the specific implementation of S31 is:
and respectively carrying out averaging processing on the actual index value sequence of each evaluation index to obtain a target index value sequence corresponding to each evaluation index.
The averaging processing can enable each data in the actual index value sequence of each evaluation index to be dimensionless, and subsequent unified analysis and calculation are facilitated. It should be noted that the specific method of the equalization processing is the prior art, and the details are not described herein.
Specifically, the expression of the performance level set is specifically: v = { V) 1 ,v 2 ,v 3 ,v 4 }；
Wherein V is the set of performance levels, V 1 Indicating the level of performance as very accurate, v 2 Indicating the level of performance as accurate, v 2 Indicating the level of performance as more accurate, v 3 Indicating the performance level is inaccurate; the rating interval with a very precise correspondence of the performance grade is 0.9,1]The performance grade is a scoring interval which corresponds to the precision [0.7,0.9 ], the performance grade is a scoring interval which corresponds to the precision [0.4,0.7 ], and the performance grade is a scoring interval which corresponds to the inaccuracy [0,0.4 ].
By the performance grade set and the grading interval, the grading interval where the target association sequence is located can be conveniently and directly inquired in the grade grading table obtained according to the performance grade set and the grading interval, so that the corresponding performance grade is obtained, the method is direct and effective, and the result is reliable and accurate.
Specifically, the rating scale table in this example is shown in table 1.
TABLE 1 grade scoring sheet
Example 2
As shown in fig. 3, the present embodiment provides a performance evaluation system of a sulfide analyzer, which is applied to the performance evaluation method of the sulfide analyzer of embodiment 1, and includes an index obtaining module, an index value measuring module, and an analysis and evaluation module;
the index acquisition module is used for acquiring the type of the measuring method adopted by the sulfide analyzer to be evaluated and determining an evaluation index set corresponding to the sulfide analyzer to be evaluated according to the type of the measuring method;
the index value determination module is used for setting the optimal test condition of the sulfide analyzer to be evaluated under the determination method type, determining a sample by using the sulfide analyzer to be evaluated according to the optimal test condition and the determination method type, and calculating an actual index value sequence corresponding to each evaluation index in the evaluation index set in the determination process;
and the analysis and evaluation module is used for analyzing the actual index value sequences of all the evaluation indexes based on a grey correlation analysis method to obtain the performance grade corresponding to the to-be-evaluated sulfide analyzer.
The performance evaluation system of the sulfide analyzer in the embodiment can comprehensively evaluate the performance of various types of sulfide analyzers, can perform self-adaptive adjustment of performance indexes according to the different types of sulfide analyzers, and is suitable for online instruments for measuring the sulfide content in gas, such as an ultraviolet absorption method, a laser absorption method, a chromatography method and the like, and online instruments for measuring the total sulfur in gas, such as an ultraviolet fluorescence method, a chromatography method and the like; the accuracy of comprehensive evaluation of the performance is high, the realization difficulty of the method is low, the product and performance level standard of the sulfide analyzer can be accurately evaluated, the quality of the sulfide analyzer in the market is ensured, and the realization of the application value of the sulfide analyzer is facilitated.
Details of the embodiment 1 and the specific descriptions of fig. 1 to 2 are not described herein again.
Example 3
Based on embodiment 1 and embodiment 2, the present embodiment further discloses a performance evaluation system of a sulfide analyzer, which includes a processor, a memory, and a computer program stored in the memory and operable on the processor, and the computer program implements the specific steps of S1 to S3 when running.
The performance of various sulfide analyzers can be comprehensively evaluated by a computer program stored in a memory and running on a processor, the performance indexes can be adaptively adjusted according to the different types of sulfide analyzers, and the method is suitable for online instruments for measuring the sulfide content in gas, such as an ultraviolet absorption method, a laser absorption method, a chromatography method and the like, and online instruments for measuring the total sulfur in gas, such as an ultraviolet fluorescence method, a chromatography method and the like; the accuracy of comprehensive evaluation of the performance is high, the realization difficulty of the method is low, the product and performance level standard of the sulfide analyzer can be accurately evaluated, the quality of the sulfide analyzer in the market is ensured, and the realization of the application value of the sulfide analyzer is facilitated.
The present embodiment also provides a computer storage medium, where at least one instruction is stored on the computer storage medium, and when executed, the instruction implements the specific steps of S1 to S3.
The performance of various sulfide analyzers of different types can be comprehensively evaluated by executing a computer storage medium containing at least one instruction, the self-adaptive adjustment of performance indexes can be carried out according to the different types of sulfide analyzers, and the method is suitable for online instruments for measuring the sulfide content in gas such as an ultraviolet absorption method, a laser absorption method and a chromatography method, and is also suitable for online instruments for measuring the total sulfur in gas such as an ultraviolet fluorescence method and a chromatography method; the accuracy of comprehensive evaluation of the performance is high, the realization difficulty of the method is low, the product and performance level standard of the sulfide analyzer can be accurately evaluated, the quality of the sulfide analyzer in the market is ensured, and the realization of the application value of the sulfide analyzer is facilitated.
Details of the embodiment 1 and the specific descriptions of fig. 1 to 2 are not described herein again.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A performance evaluation method of a sulfide analyzer is characterized by comprising the following steps:
s1, obtaining a determination method type adopted by a sulfide analyzer to be evaluated, and determining an evaluation index set corresponding to the sulfide analyzer to be evaluated according to the determination method type;
s2, setting an optimal test condition of the sulfide analyzer to be evaluated under the type of the test method, testing the sample by adopting the sulfide analyzer to be evaluated according to the optimal test condition and the type of the test method, and calculating an actual index value sequence corresponding to each evaluation index in the evaluation index set in the test process;
and S3, analyzing the actual index value sequences of all the evaluation indexes based on a grey correlation analysis method to obtain the performance grade corresponding to the sulfide analyzer to be evaluated.
2. The performance evaluation method of a sulfide analyzer according to claim 1, wherein the measurement method types include an ultraviolet absorption method, a laser absorption method, a chromatography method, and an ultraviolet fluorescence method;
the specific implementation of determining the evaluation index set corresponding to the sulfide analyzer to be evaluated according to the type of the determination method is as follows:
when the type of the measuring method is an ultraviolet absorption method, a laser absorption method or an ultraviolet fluorescence method, the evaluation index set corresponding to the sulfide analyzer to be evaluated comprises effectiveness, repeatability, linearity, drift and indicating value errors;
when the determination method type is chromatography, the evaluation index set corresponding to the sulfide analyzer to be evaluated comprises effectiveness, repeatability, linearity, drift, indicating error and separation degree.
3. The performance evaluation method of the sulfide analyzer according to claim 2, wherein the step S2 is implemented by specifically adopting the following method:
s2-1: the specific steps of calculating the actual index value sequence corresponding to the effectiveness evaluation index of the to-be-evaluated sulfide analyzer in the measuring process are as follows:
under the optimal test condition, selecting blank sample gas as a sample to carry out n times of blank tests to obtain a first test result of the n times of blank tests; selecting a first standard sample gas higher than the detection limit of the sulfide analyzer to be evaluated as a sample for n 1 Sub-response test to obtain n 1 A second test result of the secondary response test;
select the ith 1 First test result and ith of the Secondary blank test 1 Judging the selected first test result according to the second test result of the secondary response test and the preset blank test criterion to obtain the ith test result 1 Second blank test corresponds toAn effectiveness value, judging the selected second test result according to the preset response test criterion to obtain the ith test result 1 A second validity value corresponding to the secondary response test;
to the ith 1 First validity value and ith corresponding to secondary blank test 1 Carrying out weighted average operation on the second effectiveness value corresponding to the secondary response test to obtain a corresponding effectiveness average value;
and traversing the first test result of each blank test and the second test result of each response test to obtain n effectiveness means, and obtaining an actual index value sequence corresponding to the effectiveness evaluation index of the sulfide analyzer to be evaluated according to the n effectiveness means.
S2-2, calculating an actual index value sequence corresponding to the repeatability evaluation index of the to-be-evaluated sulfide analyzer in the measuring process, wherein the specific steps are as follows:
under the best test conditions, n is selected 1 Taking second standard sample gases with different given concentration values and lower than the detection limit of the to-be-evaluated sulfide analyzer as samples, and performing n times of repeatability tests on each second standard sample gas to obtain the sulfide concentration of each second standard sample gas in the n times of repeatability tests;
select the ith 2 The sulfide concentration of the second standard sample gas in n times of repeatability tests is calculated 2 The relative standard deviation of the second standard sample gas;
traversing each second standard sample gas at n respectively 2 Calculating the sulfide concentration of the repeatability test to obtain n 1 The relative standard deviation of the second standard sample gas; and according to n 1 The relative standard deviation of the second standard sample gas is used as an actual index value sequence corresponding to a repeatability evaluation index of the to-be-evaluated sulfide analyzer in the measuring process;
calculate the ith 2 The specific formula of the relative standard deviation of the second standard sample gas is as follows:
s2-3: the concrete steps of calculating the actual index value sequence corresponding to the indication error evaluation index of the to-be-evaluated sulfide analyzer in the measuring process are as follows:
under the best test condition, selecting any given concentration value and a second standard sample gas which is lower than the detection limit of the sulfide analyzer to be evaluated as a sample to carry out n times of error determination tests to obtain the sulfide concentration of the selected second standard sample gas in each error determination test;
calculating to obtain the indication error under each error measurement test according to the given concentration value of the selected second standard sample gas and the sulfide concentration of each error measurement test; obtaining an actual index value sequence corresponding to the indication errors of the sulfide analyzer to be evaluated in the measuring process according to all the indication errors;
is calculated at the i 3 The specific formula of the indicating value error under the secondary error determination test is as follows:
s2-4: the concrete steps of calculating the actual index value sequence corresponding to the linear evaluation index of the sulfide analyzer to be evaluated in the measuring process are as follows:
under the best test condition, selecting a plurality of second standard sample gases with different given concentration values and lower than the detection limit of the sulfide analyzer to be evaluated as samples to perform a linear measurement test, and performing linear fitting according to the given concentration values of the plurality of groups of second standard sample gases and the sulfide concentration values of the plurality of groups of second standard sample gases measured in the linear measurement test to obtain a linear fitting curve;
calculating a linear correlation coefficient according to the linear fitting curve; and repeat the linearity determination test n 1 Then, obtain n 1 Linear correlation coefficients under a secondary linear measurement test are obtained, and an actual index value sequence linearly corresponding to the sulfide analyzer to be evaluated in the measurement process is obtained according to all the linear correlation coefficients;
s2-5: the specific steps of calculating the actual index value sequence corresponding to the drift evaluation index of the to-be-evaluated sulfide analyzer in the measuring process are as follows:
under the best test conditions, n is selected 1 Respectively carrying out stability tests on second standard sample gases with different given concentration values and lower than detection limit of sulfide analyzer to be evaluated as samples, and respectively carrying out stability tests on the ith sample gas 4 Recording initial zero readings of a sulfide analyzer to be evaluated in a stability test by using a second standard sample gas with a given concentration value, recording real-time zero readings once every t minutes, and continuously recording n real-time zero readings;
according to initial zero-point reading and n times of experimentsReading the time zero point, and calculating to obtain the i th position of the sulfide analyzer to be evaluated 4 The corresponding actual drift under the second standard sample gas with given concentration value;
traverse n 1 Respectively repeating the stability test on the second standard sample gas with the given concentration value to obtain the corresponding actual drift of the sulfide analyzer to be evaluated under each second standard sample gas with the given concentration value; obtaining an actual index value sequence corresponding to the drift of the sulfide analyzer to be evaluated in the measuring process according to all actual drifts;
calculating the number i of the sulfide analyzer to be evaluated 4 The specific formula of the actual drift corresponding to the second standard sample gas with given concentration value is as follows:
s2-6: the specific steps of calculating the actual index value sequence corresponding to the separation degree evaluation index of the to-be-evaluated sulfide analyzer in the measuring process are as follows:
under the optimal test condition, selecting a second standard sample gas with any given concentration value as a sample to perform n times of chromatographic analysis tests to obtain a hydrogen sulfide chromatogram and a sulfur-oxygen-carbon chromatogram in each chromatographic analysis test;
respectively calculating the separation degree between the hydrogen sulfide chromatogram and the sulfur-oxygen-carbon chromatogram in each chromatographic analysis test according to the hydrogen sulfide chromatogram and the sulfur-oxygen-carbon chromatogram in each chromatographic analysis test; obtaining an actual index value sequence corresponding to the separation degree of the sulfide analyzer to be evaluated in the determination process according to the separation degrees between all the hydrogen sulfide chromatographs and the sulfur-oxygen-carbon;
calculate the ith 5 The specific formula of the separation degree between the hydrogen sulfide chromatogram and the sulfur-oxygen-carbon in the secondary chromatographic analysis test is as follows:
4. The method for evaluating performance of a sulfide analyzer according to claim 3, wherein in step S2-1, the ith test sample is selected 1 First test result and ith of the Secondary blank test 1 Judging the selected first test result according to the second test result of the secondary response test and the preset blank test criterion to obtain the ith test result 1 Judging the selected second test result according to a preset response test criterion by using a first validity value corresponding to the secondary blank test to obtain the ith test result 1 The second validity value corresponding to the secondary response test specifically comprises the following steps:
judging and selecting the ith 1 Whether the first test result of the sub-blank test is less than or equal to 0.6mg/m 3 If yes, then the ith 1 The first validity value corresponding to the secondary blank test is 1; if not, the corresponding first validity value is 0;
judging and selecting the ith 1 Whether the second test result of the secondary response test indicates response, if yes, the ith test result indicates response 1 The second validity value corresponding to the secondary response test is 1; if not, the corresponding second validity value is 0.
5. The performance evaluation method of the sulfide analyzer according to claim 1, wherein the method is based on a grey correlation analysis method, and is characterized in that the method analyzes the actual index value sequences of all evaluation indexes to obtain the performance grade corresponding to the sulfide analyzer to be evaluated, and specifically comprises the following steps:
s5-1: respectively preprocessing the actual index value sequence of each evaluation index to obtain a target index value sequence corresponding to each evaluation index one by one;
s5-2: respectively taking each target index value sequence as a row of an index data matrix, taking the index number of all evaluation indexes as a column of the index data matrix, and constructing to obtain an index data matrix;
defining a reference index sequence of a sulfide analyzer to be evaluated;
the expressions of the index data matrix and the reference index sequence are respectively as follows:
X′ 0 ＝{x′ 0 (1),x′ 0 (2),…,x′ 0 (m)} T ；
wherein the content of the first and second substances,
for the index data matrix, specifically mxn 1 A matrix of (a); m is index number of all evaluation indexes, X' k Is the k column, x 'of the index data matrix' k (1),x′ k (2),…,x′ k (m) are all the element values, X 'in the k-th column of the index data matrix' 0 Is the reference index sequence, x' 0 (1),x′ 0 (2),…,x′ 0 (m) are all the element values of the reference index sequence;
s5-3: taking each column of the index data matrix as a comparison sequence, selecting any one of the comparison sequences, calculating absolute differences between element values corresponding to each evaluation index in the selected comparison sequence and element values corresponding to the evaluation indexes in the reference index sequence one by one, and calculating correlation coefficients between each evaluation index in the selected comparison sequence and the corresponding evaluation index in the reference index sequence according to all the absolute differences;
the specific formula for calculating the correlation coefficient between the yth evaluation index in the kth comparison sequence and the yth evaluation index in the reference index sequence is as follows:
therein, ζ k (y) is a correlation coefficient, x ', between the y th evaluation indicator in the k comparison sequence and the y th evaluation indicator in the reference indicator sequence' k (y) is the element value of the y-th evaluation indicator in the k-th comparison sequence, x' 0 (y) is the element value, | x 'of the y-th evaluation index in the reference index sequence' 0 (y)-x′ k (y) | is an absolute difference between the element value of the yth evaluation index in the kth comparison sequence and the element value of the yth evaluation index in the reference index sequence, and ρ is a resolution coefficient;
s5-4: carrying out weighted average operation on the correlation coefficients between all the evaluation indexes in the selected comparison sequence and the corresponding evaluation indexes in the reference index sequence to obtain a correlation sequence between the selected comparison sequence and the reference index sequence;
the specific formula for calculating the correlation sequence between the kth comparison sequence and the reference index sequence is as follows:
wherein r is k For the sequence of the kth comparison and the sequence of the reference index, ω y The weight of the yth evaluation index;
s5-5: traversing each comparison sequence to obtain an association sequence between each comparison sequence and the reference index sequence; determining the average value of all the correlation sequences as a target correlation sequence corresponding to the index data matrix;
s5-6: constructing a performance grade set of the sulfide analyzer to be evaluated, and grading each performance grade in the performance grade set to obtain a grade grading table corresponding to the sulfide analyzer to be evaluated;
and obtaining the performance grade corresponding to the sulfide analyzer to be evaluated according to the target correlation sequence and the grade grading table corresponding to the index data matrix.
6. The performance evaluation method of the sulfide analyzer according to claim 5, wherein the step S5-1 is implemented as follows:
and respectively carrying out averaging processing on the actual index value sequence of each evaluation index to obtain a target index value sequence corresponding to each evaluation index.
7. The performance evaluation method of a sulfide analyzer according to claim 5, wherein the expression of the performance grade set is specifically: v = { V = 1 ,v 2 ,v 3 ,v 4 }；
Wherein V is the set of performance levels, V 1 Indicating the level of performance as very accurate, v 2 Indicating the level of performance as accurate, v 2 Indicating the level of performance as more accurate, v 3 Indicating the performance level is inaccurate; the rating interval with a very precise correspondence of the performance grade is 0.9,1]The performance grade is the scoring interval which corresponds exactly [0.7,0.9 ], the performance grade is the scoring interval which corresponds more exactly [0.4,0.7 ], and the performance grade is the scoring interval which corresponds inaccurately [0,0.4 ].
8. A performance evaluation system of a sulfide analyzer is applied to the performance evaluation method of the sulfide analyzer according to any one of claims 1 to 7, and comprises an index acquisition module, an index value determination module and an analysis evaluation module;
the index acquisition module is used for acquiring the type of the measuring method adopted by the sulfide analyzer to be evaluated and determining an evaluation index set corresponding to the sulfide analyzer to be evaluated according to the type of the measuring method;
the index value determination module is used for setting the optimal test condition of the sulfide analyzer to be evaluated under the determination method type, determining the sample by adopting the sulfide analyzer to be evaluated according to the optimal test condition and the determination method type, and calculating an actual index value sequence corresponding to each evaluation index in the evaluation index set in the determination process;
and the analysis and evaluation module is used for analyzing the actual index value sequences of all the evaluation indexes based on a grey correlation analysis method to obtain the performance grade corresponding to the sulfide analyzer to be evaluated.
9. A performance evaluation system for a sulfide analyzer, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program is operable to implement the steps of a performance evaluation method for a sulfide analyzer according to any one of claims 1 to 7.
10. A computer storage medium, the computer storage medium comprising: at least one instruction which when executed performs the steps of a method of assessing the performance of a sulphide analyser according to any one of claims 1 to 7.
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