CN113763593A - Method and device for identifying inferior urea filling point based on Internet of vehicles technology - Google Patents
Method and device for identifying inferior urea filling point based on Internet of vehicles technology Download PDFInfo
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 239000004202 carbamide Substances 0.000 title claims abstract description 151
- 238000005516 engineering process Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 40
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 432
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 86
- 238000006243 chemical reaction Methods 0.000 claims abstract description 76
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 claims abstract description 40
- 230000009471 action Effects 0.000 claims abstract description 11
- 230000006399 behavior Effects 0.000 claims description 58
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 9
- 230000006855 networking Effects 0.000 claims description 9
- 238000007781 pre-processing Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 4
- 230000004931 aggregating effect Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000006722 reduction reaction Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
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- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0808—Diagnosing performance data
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Abstract
The invention provides a method and a device for identifying an inferior urea filling point based on an Internet of vehicles technology, relating to the technical field of environmental protection supervision, wherein the method comprises the following steps: acquiring the filling behavior of the vehicle; the filling behavior comprises a urea filling place and a urea filling time point; acquiring the upstream nitrogen oxide specific emission and the downstream nitrogen oxide specific emission of the vehicle in a set filling period after the filling action; obtaining the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide; and judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if not, determining the place where the vehicle generates the filling behavior as an inferior urea filling point.
Description
Technical Field
The invention relates to the technical field of environmental protection supervision, in particular to a method and a device for identifying an inferior urea filling point based on an internet of vehicles technology.
Background
At present, the diesel vehicle in China mainly adopts a technical route of Selective Catalytic Reduction (SCR) aiming at NO in tail gas emission of the diesel vehiclexBy spraying under the action of a catalystAdding ammonia or urea as reductant to remove NO from tail gasxReduction to N2And H2The basic working principle of O and SCR is as follows: the tail gas from the turbine enters an exhaust mixing pipe, a urea metering injection device is arranged on the mixing pipe, urea aqueous solution is injected, and NH is generated after hydrolysis and pyrolysis reaction of urea at high temperature3Using NH on the surface of the catalyst in SCR3Reduction of NOXDischarge N2Excess NH3Is also oxidized to N2And leakage is prevented. Typically, 5L of liquid urea aqueous solution is consumed along with 100L of fuel. Because SCR is widely applied to the aftertreatment of the tail gas of the diesel engine, the generation of particulate PM is controlled as much as possible in the engine by optimizing the oil injection and combustion processes, then the nitrogen oxide formed under the condition of oxygen enrichment is treated outside the engine, and the Nitrogen Oxide (NO) is timely treated by using urea for vehicles (the urea for vehicles is decomposed to generate ammonia at a certain temperature)x) Selective catalytic reduction is carried out, thereby achieving the purposes of energy saving and emission reduction.
As can be seen from the above, the complex physical and chemical reactions that occur in SCR include: injection, atomization, evaporation of aqueous urea solution, hydrolysis of urea and pyrolysis gas phase chemical reaction, and NOXOn the surface of the catalyst with NH3The generated catalytic surface chemical reaction needs to be added with urea in SCR to reduce the emission of nitrogen oxides. However, some merchants can sell urea by blending water in order to obtain more profits, and meanwhile, according to the sampling investigation of oil products of oil tanks of heavy-duty diesel trucks in parts of regions by industry associations, diesel samples meet the standard of less than 9%, wherein the sulfur content averagely exceeds 110 times, the highest sulfur content exceeds 800 times, the exceeding situation touches eyes and surprises, and the air quality is seriously influenced.
Therefore, the quality of urea needs to be monitored in real time, poor-quality urea is identified, and merchants accumulate a large amount of vehicle monitoring data along with the development of the internet of vehicles technology, and how to efficiently extract effective information from the data and apply the effective information to identifying the poor-quality urea and the merchants is very important, and becomes an important subject to be solved urgently in the industry.
Disclosure of Invention
In view of the above, the present invention is directed to a method and an apparatus for identifying a low-quality urea filling point based on internet of vehicles technology, so as to solve all or one of the problems mentioned in the background above.
Based on the aim, the invention provides a method for identifying an inferior urea filling point based on a vehicle networking technology, which comprises the following steps:
acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
acquiring the upstream nitrogen oxide specific emission and the downstream nitrogen oxide specific emission of the vehicle in a set filling period after the filling action; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
obtaining the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
and judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if not, determining the point where the vehicle generates the filling behavior as an inferior urea filling point.
Optionally, whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold is judged, and if the nitrogen-oxygen conversion efficiency reaches the set conversion threshold, a place where the vehicle generates the filling behavior is determined as a qualified urea filling point.
Optionally, the step of obtaining the filling behavior of the vehicle specifically includes the following steps:
acquiring urea liquid level data and longitude and latitude data of a vehicle by using a vehicle-mounted detection terminal;
preprocessing the urea liquid level data; wherein the pre-processing comprises one or a combination of more of washing, converting and analyzing the urea level data;
obtaining the change condition of the urea liquid level data after pretreatment according to the time sequence to obtain the urea filling time point of the vehicle and the corresponding longitude and latitude data;
and aggregating the urea filling time points and the corresponding longitude and latitude data of the vehicle to obtain urea filling places.
Optionally, the specific emission of the upstream nitrogen oxide is obtained by the ratio of the sum of mass flow rates of the upstream nitrogen oxide in the set filling period to the sum of engine power of the vehicle in the set filling period; the total mass flow of the nitrogen oxides in the set filling period is obtained by accumulating the mass flow of the nitrogen oxides at each time point in the set filling period, and the total engine power of the vehicle in the set filling period is obtained by accumulating the engine power at each time point in the set filling period.
Optionally, the mass flow of nitrogen oxides upstream of a single point in time is obtained from the concentration value of nitrogen oxides upstream of the selective catalytic reduction device at that point in time, the vehicle air intake and the engine fuel flow of the vehicle;
the engine power of the vehicle at a single point in time is derived from the vehicle engine speed and the engine torque at that point in time.
Optionally, the specific emission of the downstream nitrogen oxide is obtained by a ratio of a sum of mass flows of the downstream nitrogen oxide during a set charging period to a sum of engine powers of the vehicle during the set charging period.
Alternatively, the mass flow of nitrogen oxides downstream of the individual time point is derived from the concentration value of nitrogen oxides downstream of the selective catalytic reduction technology device at that time point, the vehicle intake air quantity and the engine fuel flow of the vehicle.
The invention also provides a device for identifying the inferior urea filling point based on the internet of vehicles technology, which comprises the following components:
the filling behavior identification module is used for acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
the specific emission acquisition module is used for acquiring the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide of the vehicle in a set filling period after the filling action; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
the comparison module is used for obtaining the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
and the inferior urea filling point identification module is used for judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold value, and if not, determining the place where the vehicle generates the filling behavior as the inferior urea filling point.
The invention further provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of the method for identifying the poor-quality urea filling point based on the internet of vehicles technology.
The invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for identifying a point of low-grade urea dosing based on vehicle networking technology as set forth in any one of the preceding claims.
From the above, the method and the device for identifying the poor-quality urea filling point based on the internet of vehicles technology provided by the invention can better serve for identifying the poor-quality urea, the merchants and the environmental protection supervision based on the vehicle network technology and the big data technology by acquiring the filling behavior of the vehicle, acquiring the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide of the vehicle in the set filling period after the filling behavior is acquired, acquiring the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide, and judging whether the location of the vehicle filled with the urea and the merchant at the location have the behavior of water-doped sales according to the nitrogen-oxygen conversion efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a first schematic flow chart of a method for identifying an inferior urea filling point based on Internet of vehicles technology according to the present invention;
FIG. 2 is a schematic diagram of the upstream and downstream of an SCR device in the method for identifying a poor urea filling point based on Internet of vehicles technology according to the present invention;
FIG. 3 is a logic diagram of the method for identifying a point of inferior urea dosing based on Internet of vehicles technology according to the present invention;
FIG. 4 is a schematic flow chart of a second method for identifying an inferior urea filling point based on Internet of vehicles technology according to the present invention;
FIG. 5 is a flowchart illustrating a step S100 of the method for identifying an inferior urea filling point based on Internet of vehicles technology according to the present invention;
FIG. 6 is a schematic structural diagram of the device for identifying the point of inferior urea injection based on the Internet of vehicles technology;
FIG. 7 is a schematic structural diagram of a filling behavior recognition module in the device for recognizing the inferior urea filling point based on the Internet of vehicles technology according to the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to 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 described in further detail below with reference to specific embodiments and the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As a preferred embodiment of the present invention, the present invention provides a method for identifying a poor urea injection point based on car networking technology, comprising the steps of:
acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
acquiring the upstream nitrogen oxide specific emission and the downstream nitrogen oxide specific emission of the vehicle in a set filling period after the filling action; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
obtaining the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
and judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if not, determining the point where the vehicle generates the filling behavior as an inferior urea filling point.
The invention also provides a device for identifying the inferior urea filling point based on the internet of vehicles technology, which comprises the following components:
the filling behavior identification module is used for acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
the specific emission acquisition module is used for acquiring the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide of the vehicle in a set filling period after the filling action; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
the comparison module is used for obtaining the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
and the inferior urea filling point identification module is used for judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold value, and if not, determining the place where the vehicle generates the filling behavior as the inferior urea filling point.
According to the method and the device for identifying the poor-quality urea filling point based on the internet of vehicles technology, the filling behavior of the vehicle is obtained, the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide of the vehicle in the set filling period after the filling behavior is obtained, the nitrogen-oxygen conversion efficiency is obtained according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide, the nitrogen-oxygen conversion efficiency is used for judging whether the location where the vehicle is filled with urea and the merchant at the location have water-mixed selling behaviors, and the poor-quality urea, the merchant and the environmental protection supervision are better identified based on the internet of vehicles technology and the big data technology.
The following describes a preferred embodiment of the method and apparatus for identifying an inferior urea filling point based on the internet of vehicles technology according to the present invention with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, the method includes the following steps:
s100, obtaining the filling behavior of the vehicle, namely obtaining whether the vehicle is filled with urea at present. Wherein the filling action comprises a urea filling place and a urea filling time point.
In this embodiment, the urea filling place refers to a longitude and latitude coordinate of a vehicle during refueling, and a merchant filling urea in the longitude and latitude coordinate can be obtained through the longitude and latitude coordinate.
S200, acquiring the upstream Nitrogen Oxide (NO) of the vehicle in the set filling period after the filling actionx) Specific emission and downstream NOxSpecific discharge of (d); wherein upstream NOxIs NO in the upstream part of the selective catalytic reduction technologyxSpecific emission, NO in the upstream partxIs partially discharged at the downstream part of the SCR device after undergoing the SCR reaction, and the discharged gas comprises part of unreacted NOxAnd NOxN obtained after reduction2And H2O。
It should be noted that the set filling period may be specifically set according to actual situations.
In this method, as shown in the formula (1), upstream NOxIs discharged by NO upstream of the set filling cyclexThe ratio of the sum of the mass flows to the sum of the engine power of the vehicle in the set filling period is obtained, and the formula (1) is as follows:
upstream NOxSpecific emissions (mg/kwh) sigma upstream NOx mass flow/sigma engine power (1)
I.e. NO in the set filling periodxThe sum of mass flow is determined by NO at each time point in the set filling periodxThe mass flow is accumulated, and the sum of the engine power of the vehicle in the set filling period is accumulated by the engine power at each time point in the set filling period.
In this method, as shown in the formula (2), downstream NOxIs determined by the NO downstream of the set filling cyclexThe ratio of the sum of the mass flows to the sum of the engine power of the vehicle in the set filling period is obtained, and the formula (2) is as follows:
downstream NOxSpecific exhaust (mg/kwh) downstream ∑ sNOx Mass flow/Sigma Engine Power (2)
I.e. NO in the set filling periodxThe sum of mass flow is determined by NO at each time point in the set filling periodxThe mass flow is accumulated, and the sum of the engine power of the vehicle in the set filling period is accumulated by the engine power at each time point in the set filling period.
NO at a single point in time, as shown in equation (3)xMass flow rate from NO of SCR device at the time pointxThe concentration value, the vehicle air intake amount and the engine fuel flow of the vehicle, the engine power of the vehicle at a single time point is obtained from the vehicle engine speed and the engine torque at the time point, and formula (2) is as follows:
vehicle engine power ═ vehicle engine speed ═ vehicle engine torque/9550 (3)
In the present embodiment, the calculated invalid value defaults to 0, for example, 65535 is an invalid value, and defaults to 0 when the concentration is a negative value.
S300 according to upstream NOxSpecific emission and downstream NOxThe nitrogen-oxygen conversion efficiency is obtained. Specifically, nitrogen-oxygen conversion efficiency { (upstream NO { (xSpecific exhaust-downstream NOxSpecific emission)/upstream NOxSpecific exhaust of 100%.
S400, judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if not, determining the point where the vehicle generates the filling behavior as an inferior urea filling point. The poor-quality urea filling point represents the place where the vehicle is filled with urea and whether the merchant at the place has water-mixed sales behaviors or not.
The merchant at the location may then be blacklisted, and the name, longitude, latitude, number of overproof times, average conversion efficiency, etc. of the location may be recorded.
The set switching threshold may be set specifically according to actual conditions. In this embodiment, the emission limit is set to 75-85%, and preferably, the set switching threshold is 80%.
According to the method for identifying the poor-quality urea filling point based on the internet of vehicles technology, the filling behavior of the vehicle is obtained, the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide of the vehicle in the set filling period after the filling behavior is obtained, the nitrogen-oxygen conversion efficiency is obtained according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide, whether the water-doped selling behavior exists in the urea filling place of the vehicle and a merchant at the place or not is judged according to the nitrogen-oxygen conversion efficiency, and the poor-quality urea, the merchant and the environmental protection supervision are better identified based on the vehicle network technology and the big data technology.
Referring to fig. 4, step S400 further includes the following steps:
s400, judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if so, determining the position of the vehicle where the filling behavior is generated as a qualified urea filling point.
Referring to fig. 5, step S100 specifically includes the following steps:
s110, acquiring urea (reactant) liquid level data, longitude and latitude data and other data of the vehicle by using the vehicle-mounted detection terminal. More specifically, after acquiring data such as urea level data and longitude and latitude data of a vehicle, the vehicle-mounted detection terminal sends the data to a vehicle-mounted processing system through a Controller Area Network (CAN) bus. It can be understood that the vehicle detection terminal is used for acquiring urea liquid level data, longitude and latitude data and the like of the vehicle.
And S120, preprocessing urea liquid level data. In this embodiment, the pre-processing includes one or a combination of cleaning, converting, and analyzing the urea level data.
S130, obtaining the change condition of the pre-processed urea liquid level data according to the time sequence, and obtaining the urea filling time point and the corresponding longitude and latitude data of the vehicle.
And S140, aggregating the urea filling time point of the vehicle and the corresponding longitude and latitude data to obtain a urea filling place.
The device for identifying the poor-quality urea filling point based on the internet of vehicles technology provided by the invention is described below, and the device for identifying the poor-quality urea filling point based on the internet of vehicles technology described below and the method for identifying the poor-quality urea filling point based on the internet of vehicles technology described above can be correspondingly referred to.
Referring to fig. 6, the apparatus includes:
and the filling behavior identification module 100 is used for acquiring the filling behavior of the vehicle, namely whether the vehicle is filled with urea at present. Wherein the filling action comprises a urea filling place and a urea filling time point.
In this embodiment, the urea filling place refers to a longitude and latitude coordinate of a vehicle during refueling, and a merchant filling urea in the longitude and latitude coordinate can be obtained through the longitude and latitude coordinate.
The specific emissions acquisition module 200 acquires an upstream Nitrogen Oxide (NO) of the vehicle during a fill cycle set after a fill eventx) Specific emission and downstream NOxSpecific discharge of (d); wherein upstream NOxIs NO in the upstream part of the selective catalytic reduction technologyxSpecific emission, NO in the upstream partxIs partially discharged at the downstream part of the SCR device after undergoing the SCR reaction, and the discharged gas comprises part of unreacted NOxAnd NOxN obtained after reduction2And H2O。
It should be noted that the set filling period may be specifically set according to actual situations.
In this device, as shown in the formula (4), upstream NOxIs determined by upstream NO in a set priming cyclexThe ratio of the sum of the mass flows to the sum of the engine power of the vehicle during the set filling period is obtained, and the formula (4) is as follows:
upstream NOxSpecific emissions (mg/kwh) sigma upstream NOx mass flow/sigma engine power (4)
I.e. upstream NO in a set filling cyclexThe sum of mass flow is determined by NO upstream of each time point in the set filling periodxThe mass flow is accumulated, and the sum of the engine power of the vehicle in the set filling period is accumulated by the engine power at each time point in the set filling periodThus obtaining the product.
It should be noted that the set filling period may be specifically set according to actual situations.
In this device, as shown in the formula (5), downstream NOxIs determined by the downstream NO in the set charging periodxThe ratio of the sum of the mass flows to the sum of the engine power of the vehicle during the set filling period is obtained, and the formula (5) is as follows:
downstream NOxSpecific emissions (mg/kwh) sigma downstream NOx mass flow per sigma engine power (5)
I.e. NO downstream of the set filling periodxThe sum of mass flow is determined by NO downstream of each time point in the set filling periodxThe mass flow is accumulated, and the sum of the engine power of the vehicle in the set filling period is accumulated by the engine power at each time point in the set filling period.
NO at a single point in time, as shown in equation (6)xMass flow rate from NO of SCR device at the time pointxThe concentration value, the vehicle air intake amount, and the engine fuel flow rate of the vehicle, the engine power of the vehicle at a single point in time being obtained from the vehicle engine speed and the engine torque at that point in time, and equation (6) being:
vehicle engine power ═ vehicle engine speed ═ vehicle engine torque/9550 (6)
In the present embodiment, the calculated invalid value defaults to 0, for example, 65535 is an invalid value, and defaults to 0 when the concentration is a negative value.
And the inferior urea filling point identification module 400 is used for judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if not, determining the point where the vehicle generates the filling behavior as the inferior urea filling point. The poor-quality urea filling point represents the place where the vehicle is filled with urea and whether the merchant at the place has water-mixed sales behaviors or not.
The merchant at the location may then be blacklisted, and the name, longitude, latitude, number of overproof times, average conversion efficiency, etc. of the location may be recorded.
The set switching threshold may be set specifically according to actual conditions. In this embodiment, the emission limit is set to 75-85%, and preferably, the set switching threshold is 80%.
According to the device for identifying the poor-quality urea filling point based on the Internet of vehicles technology, the filling behavior identification module 100, the specific emission acquisition module 200, the comparison module 300 and the poor-quality urea filling point identification module 400 are combined, whether water-doped sales behaviors exist in a place where urea is filled into a vehicle and a merchant at the place or not is judged according to the nitrogen-oxygen conversion efficiency, and the device can be used for better identifying poor-quality urea, merchants and environment-friendly supervision based on the vehicle network technology and the big data technology.
The inferior urea filling point identification module 400 further includes:
and judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if so, determining the point where the vehicle generates the filling behavior as a qualified urea filling point.
Referring to fig. 7, the filling behavior recognition module 100 specifically includes:
the data acquisition unit 110 is configured to acquire data such as urea level data and longitude and latitude data of a vehicle by using a vehicle-mounted detection terminal. More specifically, after acquiring data such as urea level data and longitude and latitude data of a vehicle, the vehicle-mounted detection terminal sends the data to a vehicle-mounted processing system through a Controller Area Network (CAN) bus. It can be understood that the vehicle detection terminal is used for acquiring urea liquid level data, longitude and latitude data and the like of the vehicle.
And the preprocessing unit 120 is used for preprocessing the urea level data. In this embodiment, the pre-processing includes one or a combination of cleaning, converting, and analyzing the urea level data.
The first processing unit 130 is configured to obtain a change condition of the pre-processed urea liquid level data according to the time sequence, and obtain a urea filling time point and corresponding longitude and latitude data of the vehicle.
And the second processing unit 140 is configured to aggregate the urea filling time point of the vehicle and the corresponding longitude and latitude data to obtain a urea filling location.
Fig. 8 illustrates a physical structure diagram of an electronic device, and as shown in fig. 8, the electronic device may include: a processor (processor)810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other via the communication bus 840. Processor 810 may invoke logic instructions in memory 830 to perform a method of identifying a bad urea fill point based on vehicle networking technology, comprising the steps of:
s100, acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
s200, acquiring the upstream nitrogen oxide specific emission and the downstream nitrogen oxide specific emission of the vehicle in a set filling period after filling behaviors; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
s300, obtaining nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
s400, judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold value, and if not, determining the point where the vehicle generates the filling behavior as an inferior urea filling point.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, which when executed by a computer, enable the computer to perform the method for identifying a low-grade urea dosing point based on internet of vehicles technology provided by the above methods, the method for identifying a low-grade urea dosing point based on internet of vehicles technology comprising the steps of:
s100, acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
s200, acquiring the upstream nitrogen oxide specific emission and the downstream nitrogen oxide specific emission of the vehicle in a set filling period after filling behaviors; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
s300, obtaining nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
s400, judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold value, and if not, determining the point where the vehicle generates the filling behavior as an inferior urea filling point.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method for identifying a low-grade urea dosing point based on internet of vehicles technology provided above, the method for identifying a low-grade urea dosing point based on internet of vehicles technology comprising the steps of:
s100, acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
s200, acquiring the upstream nitrogen oxide specific emission and the downstream nitrogen oxide specific emission of the vehicle in a set filling period after filling behaviors; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
s300, obtaining nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
s400, judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold value, and if not, determining the point where the vehicle generates the filling behavior as an inferior urea filling point.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for identifying an inferior urea filling point based on a car networking technology is characterized by comprising the following steps:
acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
acquiring the upstream nitrogen oxide specific emission and the downstream nitrogen oxide specific emission of the vehicle in a set filling period after the filling action; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
obtaining the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
and judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if not, determining the point where the vehicle generates the filling behavior as an inferior urea filling point.
2. The method for identifying a poor urea filling point based on the internet of vehicles technology as claimed in claim 1, wherein it is determined whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold, and if the nitrogen-oxygen conversion efficiency reaches the set conversion threshold, the point where the vehicle generates the filling behavior is determined as a qualified urea filling point.
3. The method for identifying a poor urea dosing point based on internet of vehicles technology according to claim 1, wherein the step of obtaining the dosing behavior of the vehicle comprises the steps of:
acquiring urea liquid level data and longitude and latitude data of a vehicle by using a vehicle-mounted detection terminal;
preprocessing the urea liquid level data; wherein the pre-processing comprises one or a combination of more of washing, converting and analyzing the urea level data;
obtaining the change condition of the urea liquid level data after pretreatment according to the time sequence to obtain the urea filling time point of the vehicle and the corresponding longitude and latitude data;
and aggregating the urea filling time points and the corresponding longitude and latitude data of the vehicle to obtain urea filling places.
4. The vehicle networking technology-based method for identifying the poor-quality urea filling point according to claim 1, wherein the upstream nitrogen oxide specific emission is obtained by a ratio of a sum of mass flow rates of the upstream nitrogen oxides in a set filling period to a sum of engine powers of vehicles in the set filling period; the total mass flow of the nitrogen oxides in the set filling period is obtained by accumulating the mass flow of the nitrogen oxides at each time point in the set filling period, and the total engine power of the vehicle in the set filling period is obtained by accumulating the engine power at each time point in the set filling period.
5. The vehicle networking technology-based method for identifying an inferior urea dosing point according to claim 4, wherein the mass flow of nitrogen oxides upstream of a single point in time is derived from the concentration value of nitrogen oxides upstream of the selective catalytic reduction technology device at that point in time, a vehicle air intake, and a vehicle engine fuel flow;
the engine power of the vehicle at a single point in time is derived from the vehicle engine speed and the engine torque at that point in time.
6. The method for identifying a poor urea dosing point based on internet of vehicles technology as claimed in claim 5, wherein the specific emissions of the downstream nitrogen oxides are obtained from the ratio of the sum of mass flow rates of the downstream nitrogen oxides in a set dosing period to the sum of engine power of the vehicle in the set dosing period.
7. The vehicle networking technology-based method for identifying an inferior urea dosing point according to claim 6, wherein the mass flow of nitrogen oxides downstream of a single time point is derived from the concentration value of nitrogen oxides downstream of the selective catalytic reduction technology device at that time point, an intake air quantity of the vehicle, and an engine fuel flow of the vehicle.
8. The utility model provides a device based on urea point of filling of poor quality is discerned to car networking technology which characterized in that includes:
the filling behavior identification module (100) is used for acquiring the filling behavior of the vehicle; wherein the filling behavior comprises a urea filling place and a urea filling time point;
a specific emission acquisition module (200) for acquiring a specific emission of upstream nitrogen oxides and a specific emission of downstream nitrogen oxides of the vehicle in a filling period set after a filling action; wherein the upstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the upstream part of the selective catalytic reduction technology device, the downstream nitrogen oxide specific emission is the specific emission of the nitrogen oxide in the downstream part of the selective catalytic reduction technology device, and the nitrogen oxide in the upstream part is discharged in the downstream part of the selective catalytic reduction technology device after being subjected to the selective catalytic reduction technology reaction;
the comparison module (300) is used for obtaining the nitrogen-oxygen conversion efficiency according to the specific emission of the upstream nitrogen oxide and the specific emission of the downstream nitrogen oxide;
and the inferior urea filling point identification module (400) is used for judging whether the nitrogen-oxygen conversion efficiency reaches a set conversion threshold value, and if the nitrogen-oxygen conversion efficiency does not reach the set conversion threshold value, determining the point where the vehicle generates the filling action as the inferior urea filling point.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method for identifying a low-grade urea dosing point based on internet of vehicles technical data according to any one of claims 1 to 7.
10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the method for identifying a low-grade urea dosing point based on internet of vehicles technology according to any of claims 1 to 7.
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