CN110907597A - Nitrogen oxide measuring system and method based on ammonia gas detection amount compensation - Google Patents
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 321
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 30
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000012937 correction Methods 0.000 claims abstract description 73
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 57
- 238000004088 simulation Methods 0.000 claims description 27
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 24
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims description 24
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004868 gas analysis Methods 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 description 18
- 239000001301 oxygen Substances 0.000 description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 17
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 7
- 229910052726 zirconium Inorganic materials 0.000 description 7
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0037—NOx
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0068—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a computer specifically programmed
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Abstract
The invention relates to the technical field of gas analysis, and discloses a nitrogen oxide measurement system and method based on attached ammonia gas detection amount compensation. According to the method, the correction coefficient and the error value of the nitrogen oxide are obtained according to the working conditions, the correction coefficient under different nitrogen oxide concentrations is obtained, the detection data are corrected through a compensation algorithm, the measurement precision of the nitrogen oxide in the automobile exhaust is greatly improved, the method can be widely applied under different working conditions by manufacturing a standard correction coefficient table, and the complicated process of repeatedly simulating the working conditions during each measurement is avoided.
Description
Technical Field
The invention relates to the technical field of gas analysis, in particular to a nitrogen oxide measuring system and method based on attached ammonia gas detection amount compensation.
Background
With the development of society, the industrial development speed is accelerated, and the atmospheric pollution condition is more and more serious. In recent years, due to the demands of production and development, China has leap forward in the production of petrochemical engineering and motor vehicles, and although the social development is promoted to a certain extent, the atmospheric environment is seriously polluted. At present, the atmospheric environment is more and more protected internationally, the sound is more and more intense, and China also sets out some relevant laws and regulations to protect the atmospheric environment.
28 th 6 th 2018, the ministry of ecological environment issued "emission limits of pollutants for heavy-duty diesel vehicles and methods for measuring (sixth stage of china)" (national six standards for heavy-duty vehicles for short). The heavy-duty vehicle integrates the advanced features of European standard and American standard, and puts forward a stricter demand for the actual situation of China. Although diesel vehicles only account for less than 10% of the motor vehicle reserves in China, the nitrogen oxides discharged by the diesel vehicles are close to 70% of the total automobile discharge amount, and the particulate matters exceed 90%, so that the diesel vehicles are the most important in pollution prevention and control of the motor vehicles in China.
The automobile exhaust gas is exhaust gas generated when an automobile is used, and contains hundreds of different compounds, wherein the pollutants comprise solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbon, nitrogen oxide, lead, sulfur oxide and the like. Due to the existence of carbon hydride in automobile exhaust, the measurement of nitrogen oxide in the automobile exhaust has about 30% of error according to the principle of the existing nitrogen-oxygen sensor. Currently, the mainstream vehicular nitrogen-oxygen sensor on the market is manufactured by the company continental germany. The method is manufactured by using zirconium oxide according to the Nerns specific law, and has the problems of short service life, high replacement cost and the like.
The existing mass production is a nitrogen oxygen sensor of Germany continental company, a ceramic sensitive chip of the nitrogen oxygen sensor is produced by the Japan NGK company, the sensitive chip is of a double-chamber three-stage oxygen pump structure, the former two-stage oxygen pump mainly removes O2, CH and the like in tail gas and converts NO2 into NO, the third stage oxygen pump mainly decomposes NO, a zirconia type oxygen sensor is used for measuring oxygen atoms generated after NO decomposition, and the quantity of nitrogen oxygen mixture in the exhaust gas is calculated according to the corresponding relation between the oxygen atoms and the nitrogen atoms.
The operating principle of the zirconia-type oxygen sensor is as follows: the ceramic body of the zirconium tube is a porous body into which oxygen can permeate in the solid electrolyte. At higher temperatures, oxygen ionizes. If the oxygen content is different on the inside (atmosphere) side and the outside (exhaust gas) side of the zirconium tube and there is a difference in oxygen concentration, oxygen ions diffuse from the atmosphere side to the exhaust side inside the solid electrolyte, the zirconium tube is formed into a microbattery, and a voltage is generated between the platinum electrodes of the zirconium tube. When the mixed gas is lean, the oxygen content in the exhaust gas is high, the oxygen concentration difference at two sides is small, and the generated voltage is small; when the mixed gas is concentrated, the oxygen content in the exhaust gas is low, the contents of CO, CH and NOx are high, the components react with oxygen under the catalytic action of platinum on the outer surface of the zirconium tube, residual oxygen in the waste gas is consumed, the oxygen concentration on the outer surface of the zirconium tube is changed into zero, the oxygen concentration difference between the inner side and the outer side of the zirconium tube is suddenly increased, and the voltage generated between the two sides is also increased. Finally, nitrogen oxides can be measured indirectly by measuring oxygen according to the nernst equation.
The above method does not take into account the effect of ammonia present in the automobile exhaust on the final nitrogen oxide measurement, and therefore has an error of up to 30%. Meanwhile, due to the fact that the service life of the zirconia sensor is short, a new product needs to provide replacement service after two or three years, and the maintenance cost of the product is greatly increased.
Disclosure of Invention
The invention aims to provide a nitrogen oxide measuring system and method based on ammonia gas detection amount compensation, which can correct the detection data of nitrogen oxide by measuring the content of nitrogen hydride in the automobile exhaust, reducing the influence of the nitrogen hydride on the measurement result of the nitrogen oxide and improving the accuracy of the detection data so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the nitrogen oxide measuring system based on the ammonia gas detection amount compensation comprises a data acquisition module, a coefficient module and a compensation algorithm module, wherein the acquisition module is connected with the coefficient module, the coefficient module is connected with the compensation algorithm module, wherein,
the data acquisition module is used for acquiring detection data of the gas sensor on the content of nitrogen oxides and nitrogen hydrides in the tail gas sample;
the coefficient module is used for obtaining a correction coefficient according to the collection working condition of the gas sample;
the compensation algorithm module is used for calculating the content data of the nitrogen oxides through the contents of the nitrogen oxides and the nitrogen hydrides directly measured by the gas sensor and the correction coefficient;
the coefficient module further comprises:
the simulation unit is used for selecting a simulation working condition and detecting to obtain a standard correction coefficient corresponding to the simulation working condition;
the tabulation unit is used for carrying out experimental measurement on the automobile exhaust containing nitrogen oxides with different concentrations to prepare a standard correction coefficient table under each nitrogen oxide concentration;
and the query unit is used for acquiring the acquisition working condition of the tail gas sample, searching the simulation working condition which is accordant with the acquisition working condition of the tail gas sample in the standard correction coefficient table, and taking the standard correction coefficient corresponding to the accordant simulation working condition as the correction coefficient.
Furthermore, the compensation algorithm module calculates the nitrogen oxide through the content of the nitrogen oxide and the nitrogen hydride directly measured by the gas sensor and the correction coefficient.
Further, the method for obtaining the nitrogen oxide comprises the following steps: the compensation algorithm module multiplies the nitrogen oxide error value indirectly obtained by measuring nitrogen hydride by a correction coefficient, and adds the nitrogen oxide content directly measured by the gas sensor to obtain nitrogen oxide content data.
The invention provides another technical scheme: the nitrogen oxide measuring method based on the ammonia gas detection amount compensation comprises the following steps:
s1: acquiring detection data of a gas sensor on nitrogen hydride and nitrogen oxide in an automobile exhaust sample;
s2: obtaining a correction coefficient according to the collection working condition of the tail gas sample;
s3: and calculating by a nitrogen hydride compensation algorithm to obtain nitrogen oxide content data.
Further, the step of S2 is specifically:
s2-1: and selecting a simulation working condition, and detecting to obtain a standard correction coefficient corresponding to the simulation working condition. Through experimental measurement of automobile exhaust containing nitrogen oxides with different concentrations, a standard correction coefficient table under each nitrogen oxide concentration is prepared;
s2-2: acquiring the collection working condition of the tail gas sample, searching the simulation working condition which is consistent with the collection working condition of the tail gas sample in a standard correction coefficient table, and taking the standard correction coefficient corresponding to the consistent simulation working condition as a correction coefficient.
Further, the calculation formula of S3 is:
NOx (true value) = NOx (direct measurement value) + correction coefficient X △ NOx
The NOx (direct measurement value) is measured by a nitrogen oxide measurement value directly measured by a gas sensor, a correction coefficient can be inquired in a correction coefficient table obtained by experiments, △ NOx is used for calculating a nitrogen oxide error value indirectly obtained through the nitrogen hydride content measured by the gas sensor, the indirectly obtained nitrogen oxide error value is multiplied by the correction coefficient, and the nitrogen oxide content directly measured by the gas sensor is added to obtain nitrogen oxide content data.
Compared with the prior art, the invention has the beneficial effects that: according to the nitrogen oxide measuring system and method with the ammonia gas detection amount compensation, the influence of the nitrogen hydride content in the automobile exhaust on the nitrogen oxide measuring result is reduced by measuring the nitrogen hydride content, the correction coefficient and the nitrogen oxide error value are obtained according to the working condition, the correction coefficients under different nitrogen oxide concentrations are obtained, the detection data are corrected through the compensation algorithm, the measuring precision of the nitrogen oxide in the automobile exhaust is greatly improved, the system and method can be widely applied under different working conditions by manufacturing a standard correction coefficient table, and the complicated process of repeatedly simulating the operating condition in each measurement is avoided.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the structure of a coefficient module according to the present invention;
FIG. 3 is a flow chart of the method of the present invention.
In the figure: 1. a data acquisition module; 2. a coefficient module; 21. an analog unit; 22. a tabulation unit; 23. a query unit; 3. and a compensation algorithm module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the system for measuring nitrogen oxide based on ammonia gas detection amount compensation comprises a data acquisition module 1, a coefficient module 2 and a compensation algorithm module 3, wherein the data acquisition module 1 is connected to the coefficient module 2, the coefficient module 2 is connected to the compensation algorithm module 3, wherein,
the data acquisition module 1 is used for acquiring detection data of the gas sensor on the content of nitrogen oxides and nitrogen hydrides in the tail gas sample;
the coefficient module 2 is used for obtaining a correction coefficient according to the collection working condition of the gas sample; the coefficient block 2 further comprises: the simulation unit 21 is used for selecting a simulation working condition and detecting to obtain a standard correction coefficient corresponding to the simulation working condition; the tabulation unit 22 is used for carrying out experimental measurement on the automobile exhaust containing nitrogen oxides with different concentrations to prepare a standard correction coefficient table under each nitrogen oxide concentration; the query unit 23 obtains the collecting condition of the tail gas sample, searches the simulation condition corresponding to the collecting condition of the tail gas sample in the standard correction coefficient table, and uses the standard correction coefficient corresponding to the simulation condition as the correction coefficient.
The compensation algorithm module 3 is used for calculating the content data of the nitrogen oxides through the content of the nitrogen oxides and the nitrogen hydrides directly measured by the gas sensor and the correction coefficient; the compensation algorithm module 3 calculates the nitrogen oxide through the content of the nitrogen oxide and the nitrogen hydride directly measured by the gas sensor and the correction coefficient, and the method for obtaining the nitrogen oxide comprises the following steps: the compensation algorithm module 3 multiplies the nitrogen oxide error value indirectly obtained by measuring nitrogen hydride by a correction coefficient, and obtains nitrogen oxide and substance content data with higher accuracy by adding the nitrogen oxide content directly measured by the gas sensor.
The nitrogen oxide measuring method based on the ammonia gas detection amount compensation comprises the following steps:
the method comprises the following steps: acquiring detection data of a gas sensor on nitrogen hydride and nitrogen oxide in an automobile exhaust sample, and obtaining the data to facilitate later-stage measurement;
the nitrogen oxide measuring method is characterized in that the detected nitrogen oxide data is corrected by measuring the content of nitrogen hydride in the automobile exhaust and calculating through a compensation algorithm. Therefore, the method is an indispensable prerequisite step for obtaining the detection data of the gas sensor on the automobile exhaust sample, and the actual result of the nitrogen oxide detection data of the gas sensor is the nitrogen oxide content directly measured by the gas sensor and the nitrogen oxide error value indirectly obtained by measuring the nitrogen hydride and multiplied by a correction coefficient.
Step two: obtaining a correction coefficient according to the collection working condition of the tail gas sample;
since the contents of nitrogen oxides indirectly obtained by measuring nitrogen hydrides are different at different concentrations of nitrogen oxides, it is necessary to correct the indirectly measured contents of nitrogen oxides by multiplying corresponding correction coefficients.
In order to enable the method to conveniently inquire the correction coefficients under different nitrogen oxide concentrations, the method can prepare a standard correction coefficient table in advance, and the specific mode is as follows:
1) selecting a simulation working condition, detecting to obtain a standard correction coefficient corresponding to the simulation working condition, and performing experimental measurement on automobile exhaust containing nitrogen oxides with different concentrations to prepare a standard correction coefficient table under each nitrogen oxide concentration;
2) acquiring the acquisition working condition of the tail gas sample, searching the simulation working condition which is accordant with the acquisition working condition of the tail gas sample in the standard correction coefficient table, and taking the standard correction coefficient corresponding to the accordant simulation working condition as the correction coefficient.
Step three: and calculating by a nitrogen hydride compensation algorithm to obtain nitrogen oxide content data.
After the nitrogen hydride detection data and the correction coefficient are obtained, the nitrogen oxide error value can be obtained through a compensation algorithm, and the nitrogen oxide detection data is corrected, wherein the specific correction algorithm is as follows:
NOx (true value) = NOx (direct measurement value) + correction coefficient X △ NOx
The NOx (direct measurement value) is measured by a nitrogen oxide measurement value directly measured by a gas sensor, a correction coefficient can be inquired in a correction coefficient table obtained by experiments, △ NOx is used for calculating a nitrogen oxide error value indirectly obtained through the nitrogen hydride content measured by the gas sensor, the indirectly obtained nitrogen oxide error value is multiplied by the correction coefficient, and the nitrogen oxide error value and the correction coefficient are added with the nitrogen oxide content directly measured by the gas sensor, so that nitrogen oxide and substance content data with higher accuracy are obtained.
In summary, the nitrogen oxide measurement system and method based on the ammonia gas detection amount compensation provided by the invention reduce the influence of the nitrogen hydride content in the automobile exhaust on the nitrogen oxide measurement result by measuring the nitrogen hydride content, obtain the correction coefficient and the nitrogen oxide error value according to the working condition, obtain the correction coefficient under different nitrogen oxide concentrations, correct the detection data by the compensation algorithm, greatly improve the measurement precision of the nitrogen oxide in the automobile exhaust, and can be widely applied under different working conditions by manufacturing the standard correction coefficient table, and avoid the complex process of repeatedly simulating the operation working condition during each measurement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. The nitrogen oxide measuring system based on the additional ammonia gas detection amount compensation is characterized by comprising a data acquisition module (1), a coefficient module (2) and a compensation algorithm module (3), wherein the acquisition module (1) is connected with the coefficient module (2), the coefficient module (2) is connected with the compensation algorithm module (3), wherein,
the data acquisition module (1) is used for acquiring detection data of the gas sensor on the content of nitrogen oxides and nitrogen hydrides in the tail gas sample;
the coefficient module (2) is used for obtaining a correction coefficient according to the collection working condition of the gas sample;
the compensation algorithm module (3) is used for calculating the content data of the nitrogen oxides through the content of the nitrogen oxides and the nitrogen hydrides directly measured by the gas sensor and the correction coefficient;
the coefficient module (2) further comprises:
the simulation unit (21) is used for selecting a simulation working condition and detecting to obtain a standard correction coefficient corresponding to the simulation working condition;
the tabulation unit (22) is used for carrying out experimental measurement on the automobile exhaust containing nitrogen oxides with different concentrations to prepare a standard correction coefficient table under each nitrogen oxide concentration;
and the query unit (23) is used for acquiring the acquisition working condition of the tail gas sample, searching the simulation working condition which is accordant with the acquisition working condition of the tail gas sample in the standard correction coefficient table, and taking the standard correction coefficient corresponding to the accordant simulation working condition as the correction coefficient.
2. The nitrogen oxide measurement system based on the ammonia gas detection amount compensation as claimed in claim 1, wherein the compensation algorithm module (3) calculates the nitrogen oxide through the nitrogen oxide and the nitrogen hydride content directly measured by the gas sensor and the correction coefficient.
3. The system for measuring nitrogen oxides based on ammonia gas detection amount compensation according to claim 2, wherein the method for obtaining nitrogen oxides is as follows: the compensation algorithm module (3) multiplies the nitrogen oxide error value indirectly obtained by measuring nitrogen hydride by a correction coefficient, and adds the nitrogen oxide content directly measured by the gas sensor to obtain nitrogen oxide and matter content data.
4. The nitrogen oxide measuring method based on the ammonia gas detection amount compensation is characterized by comprising the following steps of:
s1: acquiring detection data of a gas sensor on nitrogen hydride and nitrogen oxide in an automobile exhaust sample;
s2: obtaining a correction coefficient according to the collection working condition of the tail gas sample;
s3: and calculating by a nitrogen hydride compensation algorithm to obtain nitrogen oxide content data.
5. The method for measuring nitrogen oxides based on ammonia gas detection amount compensation according to claim 4, wherein the step of S2 is specifically as follows:
s2-1: selecting a simulation working condition, and detecting to obtain a standard correction coefficient corresponding to the simulation working condition;
through experimental measurement of automobile exhaust containing nitrogen oxides with different concentrations, a standard correction coefficient table under each nitrogen oxide concentration is prepared;
s2-2: acquiring the collection working condition of the tail gas sample, searching the simulation working condition which is consistent with the collection working condition of the tail gas sample in a standard correction coefficient table, and taking the standard correction coefficient corresponding to the consistent simulation working condition as a correction coefficient.
6. The method for measuring nitrogen oxides based on ammonia gas detection amount compensation according to claim 4, wherein the calculation formula of S3 is as follows:
NOx (true value) = NOx (direct measurement value) + correction coefficient X △ NOx
The NOx (direct measurement value) is measured by a nitrogen oxide measurement value directly measured by a gas sensor, a correction coefficient can be inquired in a correction coefficient table obtained by experiments, △ NOx is used for calculating a nitrogen oxide error value indirectly obtained through the nitrogen hydride content measured by the gas sensor, the indirectly obtained nitrogen oxide error value is multiplied by the correction coefficient, and the nitrogen oxide content directly measured by the gas sensor is added to obtain nitrogen oxide content data.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991920A (en) * | 2022-05-23 | 2022-09-02 | 重庆文理学院 | Treatment system for nitrogen oxide in diesel engine automobile exhaust |
| DE102021213171A1 (en) | 2021-11-23 | 2023-05-25 | Vitesco Technologies GmbH | System and method for adjusting the NOx sensor value based on HC during an internal combustion engine steady state |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675203A (en) * | 2013-11-21 | 2014-03-26 | 潍柴动力股份有限公司 | Method and system for measuring nitrogen oxides |
| US20150218991A1 (en) * | 2014-02-03 | 2015-08-06 | Caterpillar Inc. | Exhaust emission prediction system and method |
| US20150247435A1 (en) * | 2014-03-03 | 2015-09-03 | Cummins Inc. | Systems, methods, and apparatus for reductant dosing in an scr aftertreatment system |
| US20170045471A1 (en) * | 2014-04-22 | 2017-02-16 | Denso Corporation | NOx CONCENTRATION MEASUREMENT SYSTEM |
| CN111810282A (en) * | 2020-07-17 | 2020-10-23 | 广西玉柴机器股份有限公司 | Nitrogen-oxygen sensor correction method self-adaptive according to tail gas parameters |
-
2018
- 2018-09-17 CN CN201811079236.3A patent/CN110907597A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675203A (en) * | 2013-11-21 | 2014-03-26 | 潍柴动力股份有限公司 | Method and system for measuring nitrogen oxides |
| US20150218991A1 (en) * | 2014-02-03 | 2015-08-06 | Caterpillar Inc. | Exhaust emission prediction system and method |
| US20150247435A1 (en) * | 2014-03-03 | 2015-09-03 | Cummins Inc. | Systems, methods, and apparatus for reductant dosing in an scr aftertreatment system |
| US20170045471A1 (en) * | 2014-04-22 | 2017-02-16 | Denso Corporation | NOx CONCENTRATION MEASUREMENT SYSTEM |
| CN111810282A (en) * | 2020-07-17 | 2020-10-23 | 广西玉柴机器股份有限公司 | Nitrogen-oxygen sensor correction method self-adaptive according to tail gas parameters |
Non-Patent Citations (1)
| Title |
|---|
| 王天田 等: ""利用NOx传感器的NH3交叉敏感实现SCR***闭环控制"", 《内燃机学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021213171A1 (en) | 2021-11-23 | 2023-05-25 | Vitesco Technologies GmbH | System and method for adjusting the NOx sensor value based on HC during an internal combustion engine steady state |
| CN114991920A (en) * | 2022-05-23 | 2022-09-02 | 重庆文理学院 | Treatment system for nitrogen oxide in diesel engine automobile exhaust |
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