CN113030399B - Method and device for determining urea concentration - Google Patents
Method and device for determining urea concentration Download PDFInfo
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- CN113030399B CN113030399B CN202110336388.2A CN202110336388A CN113030399B CN 113030399 B CN113030399 B CN 113030399B CN 202110336388 A CN202110336388 A CN 202110336388A CN 113030399 B CN113030399 B CN 113030399B
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 487
- 239000004202 carbamide Substances 0.000 title claims abstract description 487
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000004590 computer program Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 abstract description 4
- 239000007864 aqueous solution Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004065 semiconductor Substances 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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Abstract
The present disclosure provides a method and apparatus for determining urea concentration. The method comprises the following steps: periodically acquiring the reference urea concentration in the urea tank; determining a urea concentration difference value through the reference urea concentration and the actual urea concentration in the previous period, and comparing the urea concentration difference value with a first preset threshold value; if the urea concentration difference value is not larger than the first preset threshold value, determining the actual urea concentration in the period according to the first urea temperature and the second urea temperature; wherein the first urea temperature is the temperature of urea in the urea tank and the second urea temperature is the temperature of the reference urea concentration. Therefore, whether floating ice, bubbles and the like exist in the urea box or not is determined according to the temperatures of the first urea and the second urea, the influence on the measurement of the concentration of the urea caused by the existence of the floating ice, the bubbles and the like is avoided, and the accuracy of the detection result of the concentration of the urea is improved.
Description
Technical Field
The invention relates to the technical field of vehicle tail gas treatment, in particular to a method and a device for determining urea concentration.
Background
In a vehicle aftertreatment system, urea aqueous solution is injected into a vehicle exhaust passage through a nozzle, and ammonia is generated by hydrolyzing urea using heat of exhaust gas, and ammonia is used as a reducing agent of a selective catalytic reduction device, thereby reducing nitrogen oxides in diesel exhaust gas.
In the prior art, the urea concentration in the urea aqueous solution in the urea tank is detected by a urea quality sensor. However, the urea tank containing the urea aqueous solution inevitably vibrates as the vehicle travels, so that bubbles are generated in the urea aqueous solution, and the bubbles interfere with the detection of the concentration of the urea aqueous solution by the urea quality sensor due to the difference in propagation velocity of ultrasonic waves in the gas and the liquid. When the vehicle is in a cold region, the urea tank can generate floating ice, and the propagation speed of ultrasonic waves in liquid and solid is different, so that the floating ice can interfere with the detection of the urea concentration by the urea quality sensor. This results in a lower accuracy of the urea concentration detection.
Disclosure of Invention
The exemplary embodiment of the disclosure provides a method and a device for determining urea concentration, which are used for improving the accuracy of a detection result of urea concentration.
A first aspect of the present disclosure provides a method of determining a concentration of urea for detecting the concentration of urea in a urea tank of an automobile, the method comprising:
periodically acquiring the reference urea concentration in the urea tank;
determining a urea concentration difference value through the reference urea concentration and the actual urea concentration in the previous period, and comparing the urea concentration difference value with a first preset threshold value;
if the urea concentration difference value is not larger than the first preset threshold value, determining the actual urea concentration in the period according to the first urea temperature and the second urea temperature; wherein the first urea temperature is the temperature of urea in the urea tank and the second urea temperature is the temperature of the reference urea concentration.
In this embodiment, when it is determined that the difference value of the urea concentration is not greater than the first preset threshold, the actual temperature of the period is determined by the temperature of urea in the urea tank (the first urea temperature) and the temperature of the reference urea concentration (the second urea temperature), so that whether floating ice, bubbles and the like exist in the urea tank is determined according to the first urea temperature and the second urea temperature, the influence on the measurement of the urea concentration due to the existence of the floating ice, the bubbles and the like is avoided, and the accuracy of the urea concentration detection result is improved.
In one embodiment, the method further comprises:
and if the urea concentration difference value is determined to be larger than the first preset threshold value, determining the reference urea concentration as the actual urea concentration in the period.
In this embodiment, whether the urea concentration needs to be further determined is determined through the urea concentration difference value, and when it is determined that the urea concentration difference value is greater than the first preset threshold value, the actual urea concentration in the present period can be directly output, and further determination of the urea concentration is not needed, so that the calculated amount is saved.
In one embodiment, determining the actual urea concentration for the present period based on the first urea temperature and the second urea temperature includes:
determining a urea temperature difference from the first urea temperature and the second urea temperature;
if the urea temperature difference is greater than a second preset threshold, determining the reference urea concentration as the actual urea concentration in the period; or alternatively, the first and second heat exchangers may be,
and if the urea temperature difference value is not greater than the second preset threshold value, determining the actual urea temperature of the previous period as the actual urea temperature of the current period.
In this embodiment, by comparing the urea temperature difference value with a second preset threshold value, it is determined whether there is ice flocs or bubbles, and the actual urea temperature in the present period is determined according to the comparison result. Thereby improving the accuracy of the detection result.
In one embodiment, the urea temperature difference is determined according to the following:
determining an absolute value of a difference between the first urea temperature and the second urea temperature as the urea temperature difference; and/or the number of the groups of groups,
determining the urea concentration difference according to the following manner:
the absolute value of the difference between the reference urea concentration and the actual urea concentration of the previous cycle is determined as the urea concentration difference.
The absolute value of the difference between the first urea temperature and the second urea temperature is determined to be the urea temperature difference and/or the absolute value of the difference between the reference urea concentration and the actual urea concentration in the previous period is determined to be the urea concentration difference, so that the urea temperature difference and/or the urea concentration difference are determined more accurately.
In one embodiment, the reference urea concentration is determined by a urea quality sensor;
before the periodically acquiring the reference urea concentration in the urea tank, the method further comprises:
determining that the urea quality sensor is not faulty.
According to the method, whether the small urea quality sensor has a fault or not is detected before the reference urea concentration is determined, so that the problem that the accuracy of detecting the urea concentration is low due to the fault of the urea quality sensor is avoided, and therefore the accuracy of detecting results is further improved.
A second aspect of the present disclosure provides a urea concentration determining apparatus for detecting the concentration of urea in an automotive urea tank, the apparatus comprising:
the reference urea concentration acquisition module is used for periodically acquiring the reference urea concentration in the urea tank;
the first comparison module is used for determining a urea concentration difference value according to the reference urea concentration and the actual urea concentration in the previous period, and comparing the urea concentration difference value with a first preset threshold value;
the first actual urea concentration determining module is used for determining the actual urea concentration in the period according to the first urea temperature and the second urea temperature if the urea concentration difference value is not larger than the first preset threshold value; wherein the first urea temperature is the temperature of urea in the urea tank and the second urea temperature is the temperature of the reference urea concentration.
In one embodiment, the apparatus further comprises:
the apparatus further comprises:
and the second actual urea concentration determining module is used for determining the reference urea concentration as the actual urea concentration in the period if the urea concentration difference value is determined to be larger than the first preset threshold value.
In one embodiment, the first actual urea concentration determination module is specifically configured to:
determining a urea temperature difference from the first urea temperature and the second urea temperature;
if the urea temperature difference is greater than a second preset threshold, determining the reference urea concentration as the actual urea concentration in the period; or alternatively, the first and second heat exchangers may be,
and if the urea temperature difference value is not greater than the second preset threshold value, determining the actual urea temperature of the previous period as the actual urea temperature of the current period.
In one embodiment, the apparatus further comprises:
the urea temperature difference determining module is used for determining the urea temperature difference according to the following modes:
determining an absolute value of a difference between the first urea temperature and the second urea temperature as the urea temperature difference;
the urea concentration difference determining module is used for determining the urea concentration difference according to the following mode:
the absolute value of the difference between the reference urea concentration and the actual urea concentration of the previous cycle is determined as the urea concentration difference.
In one embodiment, the reference urea concentration is determined by a urea quality sensor; the apparatus further comprises:
and the fault detection module is used for determining that the urea quality sensor has no fault before the reference urea concentration in the urea tank is acquired periodically.
According to a third aspect of embodiments of the present disclosure, there is provided an electronic device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions for execution by the at least one processor; the instructions are executable by the at least one processor to enable the at least one processor to perform the method as described in the first aspect.
According to a fourth aspect provided by embodiments of the present disclosure, there is provided a computer storage medium storing a computer program for performing the method according to the first aspect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present disclosure, and that other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is one of the flow charts of a method of determining urea concentration according to one embodiment of the present disclosure;
FIG. 2 is a second flow chart diagram of a method of determining urea concentration according to one embodiment of the present disclosure;
FIG. 3 is a determination device of urea concentration according to one embodiment of the present disclosure;
fig. 4 is a schematic structural view of an electronic device according to an embodiment of the present disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
The term "and/or" in the embodiments of the present disclosure describes an association relationship of association objects, which indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The application scenario described in the embodiments of the present disclosure is for more clearly describing the technical solution of the embodiments of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiments of the present disclosure, and as a person of ordinary skill in the art can know that, with the appearance of a new application scenario, the technical solution provided by the embodiments of the present disclosure is equally applicable to similar technical problems. In the description of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the prior art, the urea concentration in the urea aqueous solution is detected by a urea quality sensor. However, the urea tank containing the urea aqueous solution inevitably vibrates as the vehicle travels, so that bubbles are generated in the urea aqueous solution, and the bubbles interfere with the detection of the concentration of the urea aqueous solution by the urea quality sensor due to the difference in propagation velocity of ultrasonic waves in the gas and the liquid. When the vehicle is in a cold region, the urea tank can generate floating ice, and the propagation speed of ultrasonic waves in liquid and solid is different, so that the floating ice can interfere with the detection of the urea concentration by the urea quality sensor. This results in a lower accuracy of the urea concentration detection.
Therefore, the present disclosure provides a method for determining a urea concentration, when determining that a urea concentration difference is not greater than a first preset threshold, determining an actual temperature of the present period by a temperature of urea in a urea tank (a first urea temperature) and a temperature of a reference urea concentration (a second urea temperature), thereby determining whether there is ice floe, bubbles, and the like in the urea tank according to the first urea and the second urea temperatures, avoiding an influence on measurement of the urea concentration due to the existence of the ice floe, the bubbles, and the like, and improving accuracy of a urea concentration detection result. The following describes aspects of the present disclosure in detail with reference to the accompanying drawings.
As shown in fig. 1, which is a schematic flow chart of the urea concentration determination method of the present disclosure, the method may include the following steps:
step 101: periodically acquiring the reference urea concentration in the urea tank;
wherein the reference urea concentration is determined by a urea quality sensor.
To ensure that the value of the obtained reference urea concentration is accurate, in one embodiment, it is determined that the urea quality sensor is not faulty before step 101 is performed.
For example, if it is determined that there is no fault in the urea quality sensor in the urea tank, step 101 may be performed directly. If it is determined that the urea quality sensor in the urea tank has a fault, a repair signal may be sent out until it is determined that the urea quality sensor has no fault, and step 101 is continuously performed.
Therefore, whether the small urea quality sensor has faults or not is detected before the reference urea concentration is determined, so that the problem that the accuracy of detecting the urea concentration is low due to the faults of the urea quality sensor is avoided, and the accuracy of a detection result is further improved.
Step 102: determining a urea concentration difference value through the reference urea concentration and the actual urea concentration in the previous period, and comparing the urea concentration difference value with a first preset threshold value;
in one embodiment, the urea concentration difference is determined according to the following:
the absolute value of the difference between the reference urea concentration and the actual urea concentration of the previous cycle is determined as the urea concentration difference.
Wherein the urea concentration difference can be determined according to formula (1):
σ＝|C 1 -C 2 |(1)；
wherein sigma is the concentration difference of urea, C 1 For reference urea concentration, C 2 Is the actual urea concentration of the previous cycle.
Step 103: if the urea concentration difference value is not larger than the first preset threshold value, determining the actual urea concentration in the period according to the first urea temperature and the second urea temperature; wherein the first urea temperature is the temperature of urea in the urea tank and the second urea temperature is the temperature of the reference urea concentration.
The first urea temperature is measured by a temperature probe in the urea tank, and the second urea temperature is measured by a urea quality sensor. A temperature difference is generated due to the distance between the temperature probe and the urea quality sensor. The location and distance between the temperature probe and the urea quality sensor may be set according to actual needs, and the disclosure is not limited herein.
In one embodiment, step 103 may be embodied as: determining a urea temperature difference from the first urea temperature and the second urea temperature; if the urea temperature difference is greater than a second preset threshold, determining the reference urea concentration as the actual urea concentration in the period; or if the urea temperature difference is not greater than the second preset threshold, determining the actual urea temperature of the previous period as the actual urea temperature of the current period.
Wherein, can confirm the urea temperature difference according to formula (2):
ΔT＝|T 1 -T 2 |(2)；
wherein DeltaT is the urea temperature difference, T 1 At a first urea temperature, T 2 Is the second urea temperature.
For example, if the reference urea concentration is a, the actual urea temperature of the previous cycle is B. The second preset threshold is 1 degree celsius.
And if the determined urea temperature difference is 0.5 ℃, determining that the urea temperature difference is not greater than the second preset threshold. The actual urea concentration for this period is a.
And if the determined urea temperature difference is 2 ℃, determining that the urea temperature difference is greater than the second preset threshold. The actual urea temperature for the present cycle is B.
Therefore, whether floating ice or bubbles exist or not is judged by comparing the urea temperature difference value with a second preset threshold value, and the actual urea temperature in the period is determined according to the comparison result. Thereby improving the accuracy of the detection result.
In one embodiment, if it is determined that the urea concentration difference is greater than the first preset threshold, the reference urea concentration is determined to be the actual urea concentration for the present period.
For example, if the first preset threshold is 1. The reference urea concentration is a and the actual urea temperature for the previous cycle is B. Wherein:
if the urea temperature difference is 0.8, it is determined that the urea temperature difference is not greater than the first preset threshold, and step 103 is performed to determine the actual urea concentration in the present period.
And if the urea temperature difference is 3, determining that the urea temperature difference is greater than the first preset threshold, and determining that the actual urea concentration in the period is B.
Therefore, whether the urea concentration needs to be further judged is determined through the urea concentration difference value, and when the urea concentration difference value is determined to be larger than the first preset threshold value, the actual urea concentration in the period can be directly output, and the urea concentration does not need to be further determined, so that the calculated amount is saved.
It should be noted that, the first preset threshold value and the second preset threshold value in the present disclosure may be the same or different, and may specifically be set according to actual situations, which is not limited herein.
To sum up, the beneficial effects of the present disclosure are: when the difference value of the urea concentration is not larger than the first preset threshold value, the actual temperature of the period is determined through the temperature of urea in the urea box (first urea temperature) and the temperature of the reference urea concentration (second urea temperature), so that whether floating ice, bubbles and the like exist in the urea box or not is determined according to the first urea temperature and the second urea temperature, the influence on the measurement of the urea concentration due to the existence of the floating ice, the bubbles and the like is avoided, and the accuracy of the urea concentration detection result is improved.
For further understanding of the technical solution of the present disclosure, the following detailed description with reference to fig. 2 may include the following steps:
step 201: determining that there is no fault with a urea quality sensor that is used to determine a reference urea concentration;
step 202: periodically acquiring the reference urea concentration in the urea tank;
step 203: determining a urea concentration difference value through the reference urea concentration and the actual urea concentration in the previous period;
step 204: judging whether the urea concentration difference is larger than a first preset threshold, if so, executing step 205; if not, go to step 206;
step 205: determining the reference urea concentration as an actual urea concentration for the present period;
step 206: determining a urea temperature difference from the first urea temperature and the second urea temperature; wherein the first urea temperature is the temperature of urea in the urea tank and the second urea temperature is the temperature of the reference urea concentration;
step 207: judging whether the urea temperature difference is greater than a second preset threshold, if so, executing step 208, and if not, executing step 209;
step 208: determining the reference urea concentration as an actual urea concentration for the present period;
step 209: and determining the actual urea temperature of the previous period as the actual urea temperature of the current period.
The specific steps of the disclosure will be described in detail below by taking the first preset threshold value as 1 and the second preset threshold value as 1 as an example:
and periodically acquiring the reference urea concentration in the urea box, determining the reference urea concentration as A through a urea quality sensor, and if the actual urea concentration in the previous period is B.
If the urea concentration difference is determined to be 0.5, determining a urea temperature difference according to the first urea temperature and the second urea temperature, and if the urea temperature difference is determined to be 2, determining the urea reference concentration A as the actual urea concentration in the period. If it is determined that the urea temperature difference is 0.6, the urea reference concentration B is determined as the actual urea concentration for the present period.
If the urea concentration difference is determined to be 2, the reference urea concentration A is determined to be the actual urea concentration of the present cycle.
Based on the same disclosure concept, the urea concentration determination method as described above in the present disclosure may also be implemented by a urea concentration determination device. The effect of the urea concentration determining means is similar to that of the previous method and will not be described in detail here.
Fig. 3 is a schematic structural view of a urea concentration determining apparatus according to an embodiment of the present disclosure.
As shown in fig. 3, the urea concentration determination device 300 of the present disclosure may include a reference urea concentration acquisition module 310, a first comparison module 320, and a first actual urea concentration determination module 330.
A reference urea concentration acquisition module 310 for periodically acquiring a reference urea concentration in the urea tank;
a first comparison module 320, configured to determine a urea concentration difference value according to the reference urea concentration and the actual urea concentration in the previous period, and compare the urea concentration difference value with a first preset threshold value;
a first actual urea concentration determining module 330, configured to determine an actual urea concentration in the present period according to a first urea temperature and a second urea temperature if it is determined that the urea concentration difference is not greater than the first preset threshold; wherein the first urea temperature is the temperature of urea in the urea tank and the second urea temperature is the temperature of the reference urea concentration.
In one embodiment, the apparatus further comprises:
a second actual urea concentration determining module 340, configured to determine the reference urea concentration as the actual urea concentration in the present period if it is determined that the urea concentration difference is greater than the first preset threshold.
In one embodiment, the first actual urea concentration determination module 330 is specifically configured to:
determining a urea temperature difference from the first urea temperature and the second urea temperature;
if the urea temperature difference is greater than a second preset threshold, determining the reference urea concentration as the actual urea concentration in the period;
and if the urea temperature difference value is not greater than the second preset threshold value, determining the actual urea temperature of the previous period as the actual urea temperature of the current period.
In one embodiment, the apparatus further comprises:
the urea temperature difference determination module 350 is configured to determine a urea temperature difference according to:
determining an absolute value of a difference between the first urea temperature and the second urea temperature as the urea temperature difference;
the urea concentration difference determination module 360 is configured to determine the urea concentration difference according to the following manner:
the absolute value of the difference between the reference urea concentration and the actual urea concentration of the previous cycle is determined as the urea concentration difference.
In one embodiment, the reference urea concentration is determined by a urea quality sensor; the apparatus further comprises:
a fault detection module 370 determines that the urea quality sensor is not faulty before the period obtains the reference urea concentration in the urea tank.
Having described a method and apparatus for determining urea concentration according to an exemplary embodiment of the present disclosure, an electronic device according to another exemplary embodiment of the present disclosure is next described.
Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.
In some possible implementations, an electronic device according to the present disclosure may include at least one processor, and at least one computer storage medium. Wherein the computer storage medium stores program code which, when executed by the processor, causes the processor to perform the steps in the method of determining urea concentration according to various exemplary embodiments of the disclosure described above in this specification. For example, the processor may perform steps 101-103 as shown in FIG. 1.
An electronic device 400 according to such an embodiment of the present disclosure is described below with reference to fig. 4. The electronic device 400 shown in fig. 4 is merely an example and should not be construed to limit the functionality and scope of use of embodiments of the present disclosure in any way.
As shown in fig. 4, the electronic device 400 is embodied in the form of a general-purpose electronic device. The components of electronic device 400 may include, but are not limited to: the at least one processor 401, the at least one computer storage medium 402, and a bus 403 that connects the various system components, including the computer storage medium 402 and the processor 401.
Bus 403 represents one or more of several types of bus structures, including a computer storage media bus or computer storage media controller, a peripheral bus, a processor, or a local bus using any of a variety of bus architectures.
Computer storage media 402 may include readable media in the form of volatile computer storage media, such as random access computer storage media (RAM) 421 and/or cache storage media 422, and may further include read only computer storage media (ROM) 423.
Computer storage media 402 may also include a program/utility 425 having a set (at least one) of program modules 424, such program modules 424 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.
The electronic device 400 may also communicate with one or more external devices 404 (e.g., keyboard, pointing device, etc.), one or more devices that enable a user to interact with the electronic device 400, and/or any device (e.g., router, modem, etc.) that enables the electronic device 400 to communicate with one or more other electronic devices. Such communication may occur through an input/output (I/O) interface 405. Also, electronic device 400 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 406. As shown, network adapter 406 communicates with other modules for electronic device 400 over bus 403. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 400, including, but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
In some possible embodiments, aspects of a method of determining urea concentration provided by the present disclosure may also be implemented in the form of a program product comprising program code for causing a computer device to carry out the steps of the method of determining urea concentration according to various exemplary embodiments of the present disclosure as described above in the present specification, when the program product is run on a computer device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, a random access computer storage medium (RAM), a read-only computer storage medium (ROM), an erasable programmable read-only computer storage medium (EPROM or flash memory), an optical fiber, a portable compact disc read-only computer storage medium (CD-ROM), an optical computer storage medium, a magnetic computer storage medium, or any suitable combination of the foregoing.
The program product of the determination of urea concentration of the embodiments of the present disclosure may employ a portable compact disc read-only computer storage medium (CD-ROM) and include program code and may be run on an electronic device. However, the program product of the present disclosure is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the consumer electronic device, partly on the consumer electronic device, as a stand-alone software package, partly on the consumer electronic device, partly on the remote electronic device, or entirely on the remote electronic device or server. In the case of remote electronic devices, the remote electronic device may be connected to the consumer electronic device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external electronic device (e.g., connected through the internet using an internet service provider).
It should be noted that although several modules of the apparatus are mentioned in the detailed description above, this division is merely exemplary and not mandatory. Indeed, the features and functions of two or more modules described above may be embodied in one module in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module described above may be further divided into a plurality of modules to be embodied.
Furthermore, although the operations of the methods of the present disclosure are depicted in the drawings in a particular order, this is not required to or suggested that these operations must be performed in this particular order or that all of the illustrated operations must be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.
It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk computer storage media, CD-ROM, optical computer storage media, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable computer storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable computer storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the disclosure. Thus, the present disclosure is intended to include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. A method for determining the concentration of urea, the method for detecting the concentration of urea in a urea tank of an automobile, the method comprising:
periodically acquiring a reference urea concentration in a urea tank, wherein the reference urea concentration is determined by a urea quality sensor;
determining a urea concentration difference value through the reference urea concentration and the actual urea concentration in the previous period, and comparing the urea concentration difference value with a first preset threshold value;
if it is determined that the urea concentration difference is not greater than the first preset threshold, determining, according to the first urea temperature and the second urea temperature, an actual urea concentration in the present period specifically includes:
determining a urea temperature difference from the first urea temperature and the second urea temperature;
if the urea temperature difference is greater than a second preset threshold, determining the reference urea concentration as the actual urea concentration in the period; or if the urea temperature difference is not greater than the second preset threshold, determining the actual urea concentration in the previous period as the actual urea concentration in the current period; the first urea temperature is the temperature of urea in the urea tank, which is measured by a temperature probe in the urea tank, the second urea temperature is the temperature of the reference urea concentration, which is measured by a urea quality sensor, and the distance between the temperature probe and the urea quality sensor is greater than a specified distance;
and if the urea concentration difference value is determined to be larger than the first preset threshold value, determining the reference urea concentration as the actual urea concentration in the period.
2. The method according to claim 1, characterized in that the urea temperature difference is determined according to the following manner:
determining an absolute value of a difference between the first urea temperature and the second urea temperature as the urea temperature difference; and/or the number of the groups of groups,
determining the urea concentration difference according to the following manner:
the absolute value of the difference between the reference urea concentration and the actual urea concentration of the previous cycle is determined as the urea concentration difference.
3. The method according to any one of claims 1-2, wherein the reference urea concentration is determined by a urea quality sensor;
before the periodically acquiring the reference urea concentration in the urea tank, the method further comprises:
determining that the urea quality sensor is not faulty.
4. A urea concentration determining apparatus for detecting the concentration of urea in an automotive urea tank, the apparatus comprising:
the urea concentration reference acquisition module is used for periodically acquiring the reference urea concentration in the urea tank, wherein the reference urea concentration is determined by the urea quality sensor;
the first comparison module is used for determining a urea concentration difference value according to the reference urea concentration and the actual urea concentration in the previous period, and comparing the urea concentration difference value with a first preset threshold value;
the first actual urea concentration determining module is used for determining the actual urea concentration in the period according to the first urea temperature and the second urea temperature if the urea concentration difference value is not larger than the first preset threshold value; the first actual urea concentration determining module is specifically configured to:
determining a urea temperature difference from the first urea temperature and the second urea temperature;
if the urea temperature difference is greater than a second preset threshold, determining the reference urea concentration as the actual urea concentration in the period; or if the urea temperature difference is not greater than the second preset threshold, determining the actual urea concentration in the previous period as the actual urea concentration in the current period; the first urea temperature is the temperature of urea in the urea tank, which is measured by a temperature probe in the urea tank, the second urea temperature is the temperature of the reference urea concentration, which is measured by a urea quality sensor, and the distance between the temperature probe and the urea quality sensor is greater than a specified distance;
and the second actual urea concentration determining module is used for determining the reference urea concentration as the actual urea concentration in the period if the urea concentration difference value is determined to be larger than the first preset threshold value.
5. The apparatus of claim 4, wherein the apparatus further comprises:
the urea temperature difference determining module is used for determining the urea temperature difference according to the following modes:
determining an absolute value of a difference between the first urea temperature and the second urea temperature as the urea temperature difference;
the urea concentration difference determining module is used for determining the urea concentration difference according to the following mode:
the absolute value of the difference between the reference urea concentration and the actual urea concentration of the previous cycle is determined as the urea concentration difference.
6. The apparatus according to any one of claims 4 to 5, wherein the reference urea concentration is determined by a urea quality sensor; the apparatus further comprises:
and the fault detection module is used for determining that the urea quality sensor has no fault before the reference urea concentration in the urea tank is acquired periodically.
7. An electronic device comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions for execution by the at least one processor; the instructions being executable by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1-3.
8. A computer storage medium, characterized in that it stores a computer program for executing the method according to any one of claims 1-3.
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| CN113611090B (en) * | 2021-08-23 | 2023-08-18 | 潍柴动力股份有限公司 | Monitoring method and device for urea box, electronic equipment and storage medium |
| CN113847130B (en) * | 2021-10-29 | 2022-08-23 | 潍柴动力股份有限公司 | Method for detecting urea concentration |
| CN114495447B (en) * | 2022-01-17 | 2024-03-19 | 潍柴动力股份有限公司 | Alarm method and device for abnormal concentration of urea solution of engine |
| CN114660171A (en) * | 2022-03-17 | 2022-06-24 | 潍柴动力股份有限公司 | Urea concentration detection method, urea concentration detection device, computer equipment and storage medium |
| CN115639271B (en) * | 2022-12-21 | 2023-05-23 | 潍柴动力股份有限公司 | Method for detecting urea concentration by adopting ultrasonic urea quality sensor and vehicle |
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