CN113483844B - Urea sensor volume testing device and testing method - Google Patents
Urea sensor volume testing device and testing method Download PDFInfo
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- CN113483844B CN113483844B CN202110669223.7A CN202110669223A CN113483844B CN 113483844 B CN113483844 B CN 113483844B CN 202110669223 A CN202110669223 A CN 202110669223A CN 113483844 B CN113483844 B CN 113483844B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention discloses a urea sensor volume testing device and a testing method, wherein the urea sensor volume testing device comprises a weight detection component, a flow pump and a data processing component, wherein the weight detection component comprises an electronic scale and is used for placing and weighing a urea sensor assembly to be tested so as to detect the weight variation of the urea sensor assembly; one end of the flow pump is used for being connected to the urea sensor assembly, and the other end of the flow pump is used for being connected to the urea box; the data processing group comprises a data acquisition unit and a processor, the data acquisition unit is used for being electrically connected with the urea sensor assembly so as to acquire the liquid level change percentage of urea in the urea sensor assembly, the processor is used for converting the weight change quantity of the urea sensor assembly into the volume change value of the urea, and the processor is electrically connected with the data acquisition unit so as to display the liquid level change percentage. The invention improves the testing efficiency of the urea sensor volume test and reduces the testing cost.
Description
Technical Field
The invention relates to the technical field of commercial vehicle tail gas treatment, in particular to a urea sensor volume testing device and a testing method.
Background
The automobile urea can effectively improve harmful gas in tail gas discharged by commercial vehicles, so that the harmful gas meets the national emission standard. The using amount of the urea solution for the vehicle is 3-8% of that of diesel oil, and the urea tank is a macromolecular compound product, so that the two sides of the tank body which is not fixed by the strap deform outwards due to the increase of urea in the tank body, the actual volume value and the design value of the urea tank have deviation, and in order to obtain the deviation range, the volume test of the urea sensor is required. The volume test of the urea sensor is used for simulating the process of adding and using urea by a user, and whether the urea sensor meets the design requirements and is matched with the urea tank or not is determined by comparing the urea adding and discharging to the urea tank, so that whether the liquid level is correct or not is displayed.
The urea sensor volume test comprises a urea filling volume test and a urea consumption volume test, the current volume test is that urea volumes corresponding to volume difference values corresponding to different liquid level percentages are measured through a measuring cup in the filling test and then are filled into a urea tank one by one, the consumption test needs to slowly discharge urea from a liquid discharge port, and the liquid level change condition is read from an instrument. In the operation mode, the measuring cups are used for filling urea one by one in the urea filling volume test, and then the urea is slowly poured into the urea tank, so that the process is time-consuming, the urea needs to be discharged from a liquid discharge port of the urea tank in the urea consumption volume test, the flow speed and the urea flowing condition of the discharged urea are difficult to control and can only be slowly discharged, the process is also time-consuming, and only 1-2 sensors can be measured in one working day. And the whole testing process needs at least three persons to develop cooperatively, so that the labor cost is high.
Disclosure of Invention
The invention mainly aims to provide a urea sensor volume testing device and a testing method, and aims to improve the testing efficiency of urea sensor volume testing and reduce the testing cost.
In order to achieve the above object, the present invention provides a urea sensor volume testing device, including:
the weight detection component comprises an electronic scale, the electronic scale is used for placing the urea sensor assembly to be tested and weighing the urea sensor assembly so as to detect the weight variation of the urea sensor assembly;
the flow pump is used for connecting one end of the flow pump to the urea sensor assembly, and connecting the other end of the flow pump to a urea tank, so as to fill urea into the urea tank in the urea sensor assembly or extract urea from the urea tank; and (c) a second step of,
the data processing assembly comprises a data collector and a processor, wherein the data collector is used for being electrically connected with the urea sensor assembly to obtain the liquid level change percentage of urea in the urea sensor assembly, the processor is used for converting the weight change amount of the urea sensor assembly into the volume change value of the urea, and the processor is electrically connected with the data collector to display the liquid level change percentage.
Optionally, the weight detecting component further comprises a level gauge, wherein the level gauge is used for being placed on the top of the urea sensor assembly to detect the levelness of the urea sensor assembly.
Optionally, the electronic scale comprises a chassis and a support leg arranged at the bottom of the chassis, wherein the length of the support leg is adjustable and arranged to cooperate with the level gauge to adjust the levelness of the urea sensor assembly; and/or the presence of a gas in the gas,
the electronic scale has the working face of weighing for supplying the urea sensor assembly is placed, weight detection subassembly still includes supporting structure, supporting structure locates the working face of weighing, the last installation department that still is equipped with of supporting structure is used for supplying the installation of urea sensor assembly, the installation department with the adjustable setting of interval between the working face of weighing, with the spirit level cooperation is used for adjusting the levelness of urea sensor assembly.
Optionally, the minimum weighing capacity of the electronic scale is 1000g, and the division value is 50g.
Optionally, the pump flow of the flow pump is 1.5-2L/min.
Optionally, the urea sensor volume test device further comprises:
one end of the first connecting pipe is connected with the flow pump, and the other end of the first connecting pipe is used for being connected to the urea tank; and (c) a second step of,
and one end of the second connecting pipe is connected with the flow pump, and the other end of the second connecting pipe is used for being connected to the urea sensor assembly.
In order to achieve the above object, the present invention further provides a urea sensor volume testing method, including the following steps:
providing a urea sensor volume testing device as described above;
mounting a urea sensor assembly to be tested on a weighing working surface of the electronic scale;
connecting one end of a flow pump to a urea tank, and connecting the other end of the flow pump to the urea sensor assembly;
the data acquisition unit is electrically connected with the processor and the urea sensor assembly respectively;
adjusting the levelness of the urea sensor assembly;
and starting the data acquisition device, the processor and the flow pump to fill the urea tank or extract urea from the urea tank to carry out urea volume filling test and urea volume consumption test.
Optionally, the step of connecting one end of the flow pump to a urea tank and the other end to a urea sensor assembly under test:
and one end of the flow pump is connected with a liquid outlet of the urea pipe.
Optionally, the step of connecting one end of the flow pump to a urea tank and the other end to a urea sensor assembly under test, comprises:
and connecting one end of the flow pump with the urea tank through a first connecting pipe, and connecting the other end of the flow pump with the urea sensor assembly through a second connecting pipe.
Optionally, the step of installing the urea sensor assembly connected to the flow pump on a weighing working surface of the electronic scale and adjusting the levelness of the urea sensor assembly includes:
and installing the urea sensor assembly connected with the flow pump on a weighing working surface of the electronic scale, and adjusting the levelness of the urea sensor assembly in the transverse direction and the longitudinal direction to ensure that the transverse levelness and the longitudinal levelness are not higher than 1 degree.
According to the technical scheme, the urea sensor volume testing device comprises a weight detection component, a flow pump and a data processing component, urea is filled into a urea tank in a urea sensor assembly through the flow pump or extracted from the urea tank to simulate urea filling volume testing and urea consumption volume testing, the weight detection component is used for detecting the weight variation of the urea sensor assembly to be tested, namely the actual weight variation of the urea, the data processing component is used for converting the actual weight variation of the urea into the actual volume variation of the urea, meanwhile, the data processing component is used for obtaining the liquid level variation percentage of the urea sensor assembly, namely the theoretical volume variation of the urea, the actual volume variation of the urea can be compared with the theoretical volume variation to obtain the deviation value of the urea sensor, the urea sensor volume testing is completed, and compared with a manual testing mode, the testing efficiency is greatly improved, and the testing cost is also reduced.
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 structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a urea sensor volume testing device provided by the present invention;
fig. 2 is a schematic flow chart of a urea sensor volume testing method according to an embodiment of the present invention.
The reference numbers indicate:
the implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front, rear, 8230; \8230;) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components in a specific posture (as shown in the figure), the motion situation, etc., and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The urea sensor volume test comprises a urea filling volume test and a urea consumption volume test, the current volume test is that urea volumes corresponding to volume difference values corresponding to different liquid level percentages are measured through a measuring cup in the filling test and then are filled into a urea tank one by one, the consumption test needs to slowly discharge urea from a liquid discharge port, and the liquid level change condition is read from an instrument. In the operation mode, the measuring cups are used for filling urea one by one in the urea filling volume test, and then the urea is slowly poured into the urea tank, so that the process is time-consuming, the urea needs to be discharged from a liquid discharge port of the urea tank in the urea consumption volume test, the flow speed and the urea flowing condition of the discharged urea are difficult to control and can only be slowly discharged, the process is also time-consuming, and only 1-2 sensors can be measured in one working day. And the whole testing process needs at least three persons to develop cooperatively, so that the labor cost is high.
In order to improve the testing efficiency of the urea sensor volume test and reduce the testing cost, the invention provides a urea sensor volume testing device, and fig. 1 shows an embodiment of a urea sensor volume testing device 100 provided by the invention. Referring to fig. 1, in the embodiment, the urea sensor volume testing device 100 includes a weight detecting component, a flow pump 20 and a data processing component, wherein the weight detecting component includes an electronic scale 10, the electronic scale 10 has a weighing working surface for placing a urea sensor assembly 40 to be tested, the urea sensor assembly 40 includes a urea tank 41 and a urea sensor 42 disposed at the top of the urea tank 41, and the urea sensor 42 can detect a liquid level change in the urea tank 41; the electronic scale 10 is used for weighing the urea sensor assembly 40 to detect the weight variation of the urea sensor assembly 40; one end of the flow pump 20 is connected to the urea sensor assembly 40, and the other end is connected to a urea tank 50, so as to fill urea into a urea tank 41 in the urea sensor assembly 40 or draw urea from the urea tank 41; the data processing component comprises a data collector 31 and a processor 32, the data collector 31 is used for being electrically connected with the urea sensor assembly 40, specifically, the data collector is electrically connected with the urea sensor 42 to obtain the liquid level change percentage of urea in a urea tank 41 in the urea sensor assembly 40, the processor 32 is used for converting the weight change amount of the urea sensor assembly 40 into the volume change value of the urea, and the processor 32 is electrically connected with the data collector 31 to display the liquid level change percentage.
The test principle of the urea sensor volume test device is as follows: first, urea is made to flow between the urea tank 50 and the urea tank 41 by the flow pump 20, so as to fill urea into the urea tank 41 or draw urea from the urea tank 41, so as to simulate a urea filling volume test and a urea consumption volume test; then, the weight variation of the urea sensor assembly 40 is weighed by the electronic scale 10, that is, the weight variation of the urea in the urea tank 41 is obtained, and the weight variation of the urea is converted into a volume variation value of the urea by the processor 32, so that an actual volume variation value of the urea in the urea tank 41 can be obtained; meanwhile, the data collector 31 acquires the liquid level change percentage of urea in the urea tank 41 acquired by the urea sensor 42, and the processor 32 displays the liquid level change percentage to obtain the theoretical volume change value of urea in the urea tank 41, and at the moment, the deviation value of the urea sensor is analyzed by comparing the actual volume change value with the theoretical volume change value of urea to complete the volume test of the urea sensor.
The invention provides a testing device capable of automatically testing the volume of a urea sensor, which can finish the whole testing process by only one person, reduces the labor cost of the test, does not need to perform complicated operation of measuring urea by using a measuring cup and filling or extracting the urea, and improves the testing efficiency; meanwhile, compared with a mode of measuring by using a measuring cup, the urea is conveyed between the urea tank 41 and the urea box 50 by using the flow pump 20, so that the flow speed and the volume of the urea are easier to control when the urea is filled or discharged, and the conveying accuracy and the conveying efficiency of the urea are improved; moreover, compared with a mode of reading the volume change of the urea in the urea tank 41 from the liquid level change displayed by an instrument, the method directly obtains the specific percentage (which can be accurate to 1%) of the liquid level change of the urea in the urea tank 41 detected by the urea sensor 42 through the data acquisition unit 31, and displays the liquid level change through the processor 32, the precision is higher, the test error can be reduced, the liquid level change displayed by the instrument can be delayed by 1-2 s compared with the actual change time, and the time delay of obtaining the liquid level change through the data acquisition unit 31 and the processor 32 is only 0.1-0.2 s and can be ignored, so that the test error is further reduced, and the accuracy of the test result is improved.
The processor 32 may be, for example, a computer (including but not limited to a laptop or a desktop computer) or the like, as long as the processor can store and execute a conversion formula of the weight and the volume of the urea (volume V = weight m × density ρ, ρ =1.089 g/mL), and can display the calculated or obtained data, and a laptop may be used in the embodiment of the present invention. The data collector 31 is not limited to a certain brand, and is required to output a data value and read the float height and urea liquid level percentage of the urea sensor 42 in real time, and in the specific embodiment of the present invention, CANoe may be selected. In addition, the urea sensor volume testing device 100 further comprises a power supply 60 for supplying power to the flow pump 20, the urea sensor 42, the data collector 31 and the processor 32.
Further, in the present embodiment, the weight detecting assembly further includes a level gauge (not shown in the drawings) for being placed on the top of the urea sensor assembly 40, specifically, on a nameplate on the top of the urea sensor 42 (the nameplate is a horizontal plane) to detect the levelness of the urea sensor assembly 40. In the current test mode, the test process is carried out on a real vehicle, and if the assembly process and/or the ground of the whole vehicle are uneven, the urea tank assembly of the real vehicle is easy to incline to a certain degree, so that the measured data deviates from the actual value; in the technical scheme of the invention, after the urea sensor assembly 40 to be tested is placed on the weighing working surface of the electronic scale 10, the levelness of the urea sensor assembly 40 is detected by the level meter, and after the levelness of the urea sensor assembly 40 meets the test requirement, the test is carried out, so that the inclination problem existing in the test in a real vehicle is solved, and the test accuracy is improved.
When the level meter detects that the levelness of the urea sensor assembly 40 does not meet the test requirement, the placing levelness of the urea sensor assembly 40 needs to be adjusted, and because the elemental sensor assembly 40 is placed on the electronic scale 10, only the electronic scale 10 can be adjusted, only the elemental sensor assembly 40 can be adjusted, or both the adjustment can be performed. Specifically, in an embodiment of the present invention, the electronic scale 10 includes a chassis and a leg disposed at the bottom of the chassis, wherein the length of the leg is adjustable to cooperate with the level gauge for adjusting the levelness of the urea sensor assembly. Specifically, a spiral adjustable structure may be disposed at the bottom of the chassis of the electronic scale 10, that is, the support leg may be a screw and is in threaded connection with the chassis, so that the distance between one end of the support leg, which is far away from the chassis, and the chassis can be adjusted by the rotation of the support leg, so as to adjust the levelness of the weighing working surface of the electronic scale 10, and thus, the urea sensor assembly 40 is adjusted in cooperation with the level gauge.
In another embodiment of the present invention, the weight detecting assembly further includes a supporting frame structure 11, the supporting frame structure 11 is disposed on the weighing working surface, the supporting frame structure 11 is further provided with an installation portion for installing the urea sensor assembly 40, and a distance between the installation portion and the weighing working surface is adjustable, so as to cooperate with the level gauge to adjust a levelness of the urea sensor assembly. Specifically, the support structure 11 may include a plurality of supports, preferably four supports, each of the supports is correspondingly provided with a boss for placing the urea sensor assembly 40, when the placing levelness of the urea sensor assembly 40 needs to be adjusted, only the distance between the bottom of the urea sensor assembly 40 and the boss needs to be adjusted, which may be achieved by adding a gasket on the boss, or by telescopically arranging the supports in the vertical direction, so that the height of the boss can be adjusted. In another embodiment of the present invention, the length of the supporting legs of the electronic scale 10 can be adjusted, and the weight detecting assembly further includes a supporting frame structure 11, so that the supporting legs and the supporting frame structure can be roughly adjusted by one of them, and then the supporting legs and the supporting frame structure can be finely adjusted by the other one of them, so as to ensure that the horizontal degree of the urea sensor assembly 40 meets the testing requirements.
The electronic scale 10 is mainly used for weighing the urea sensor assembly 40 to obtain the weight variation of urea in the urea tank 41, and preferably requires that the progress of the electronic scale 10 is two digits after being accurate to a decimal point, so that the accuracy of urea weight variation detection can be ensured. Thus, the electronic scale 10 can meet the basic test requirements in the volume test process of the urea sensor, and can improve the accuracy of urea weight change detection as much as possible. When the weight variation of the urea sensor assembly 40 is measured by the electronic scale 10, that is, when the weight variation of urea is obtained, the weight variation may be manually input to the processor 32, or the processor 32 (or the data collector 31) may be electrically connected to the electronic scale 10 to directly obtain the weight variation detected by the electronic scale 10.
One end of the flow pump 20 is used for being connected with the urea tank 41, the other end of the flow pump is used for being connected with the urea tank 50, and the flow pump is used for enabling urea to flow between the urea tank 41 and the urea tank 50, so that urea is filled into the urea tank 41 from the urea tank 50, or urea is extracted from the urea tank 41 and discharged into the urea tank 50, therefore, the flow pump 20 does not distinguish an inlet end and an outlet end, and the flow pump with the direction of the inlet end and the outlet end capable of being changed can be selected by reversely connecting an anode and a cathode. Further, in order to avoid the influence on the test data caused by the obvious floating of the liquid level in the urea tank 41 due to the overlarge flow rate when the urea is filled or extracted in the urea tank 41, the flow pump 20 is preferably a small-sized flow pump, and has the characteristics of small flow rate, slow pumping and discharging speed, and uniform and stable liquid flow, specifically, in a specific embodiment of the invention, the pump flow rate of the flow pump 20 is 1.5-2L/min, the working voltage is 12V, the power is 20W, the pressure is 0.5MPa, the suction negative pressure is 0.09MPa, and the flow accuracy is 1%. Thus, when the flow pump 20 fills urea into the urea tank 41 or extracts urea from the urea tank 41, the liquid level change in the urea tank 41 basically does not affect the test data, and the problem that the accuracy of the test data is affected due to large liquid level floating in the urea tank 41 caused by manually filling urea into the urea tank 41 is solved.
In addition, both ends of the flow pump 20 may be directly connected to the urea tank 41 and the urea tank 50, for example, through a pipeline joint, and in this case, the placement positions of the urea sensor assembly 40, the flow pump 20 and the urea tank 50 may be strict; the two ends of the flow pump 20 are respectively connected with the urea tank 41 and the urea tank 50 through connecting pipelines, so that the arrangement of the urea sensor assembly 40, the flow pump 20 and the urea tank 50 and the adjustment of the placement levelness of the urea sensor assembly 40 are facilitated.
Specifically, referring to fig. 1, the urea sensor volume testing device 100 further includes a first connection pipe 21 and a second connection pipe 22, wherein one end of the first connection pipe 21 is connected to the flow pump 20, and the other end is used to be connected to the urea tank 50; one end of the second connection pipe 22 is connected to the flow pump 20, and the other end is used for connecting to the urea sensor assembly 40, specifically, the urea tank 41. In this way, the urea sensor assembly 40, the flow pump 20 and the urea tank 50 are placed at more flexible positions, and can be arranged according to an actual test scene, and meanwhile, the adjustment of the placement levelness of the urea sensor assembly 40 is not interfered. It should be noted that, in a practical embodiment, the lengths of the first connecting pipe 21 and the second connecting pipe 22 should be as short as possible to reduce the amount of urea in the pipeline and improve the accuracy of the test, on the premise that the first connecting pipe 21 can be used to connect the flow pump 20 with the urea tank 50 and the second connecting pipe 22 can be used to connect the flow pump 20 with the urea tank 41.
Based on the urea sensor volume testing device 100 provided above, the present invention further provides a urea sensor volume testing method, and fig. 2 shows an embodiment of the urea sensor volume testing method provided in the present invention. Referring to fig. 2, in the present embodiment, the urea sensor volume testing method includes the following steps:
step S10, providing the urea sensor volume testing device 100;
firstly, a flat ground is selected as a test area, the provided urea sensor volume testing device 100 is placed in the test area, and the electronic scale 10 is adjusted to be not shaken, specifically, the four spiral support legs of the electronic scale 10 are adjusted to perform primary adjustment, and then the urea sensor assembly 40 to be tested is installed in the follow-up process and then fine adjustment is performed.
S20, mounting a urea sensor assembly to be tested on a weighing working surface of the electronic scale;
after the urea sensor volume testing device 100 is placed to prevent the electronic scale 10 from shaking, the urea sensor assembly 40 to be tested is mounted on the weighing working surface of the electronic scale 10 according to the position shown in fig. 1, specifically, the urea tank 41 in the urea sensor assembly 40 is mounted on the bracket structure 11.
Step S30, connecting one end of a flow pump to a urea box, and connecting the other end of the flow pump to the urea sensor assembly;
connecting one end of the flow pump 20 to a urea tank 50, specifically, connecting one liquid outlet of the flow pump 20 to the urea tank 50 through a first connecting pipe 21; and the other end of the flow pump 20 is connected to a urea sensor assembly 40 to be tested, specifically, connected to a urea tank 41 in the urea sensor assembly 40, and the other liquid outlet of the flow pump 20 is communicated with the urea tank 41 through a second connecting pipe 22.
In the present urea volumetric filling test, urea is directly filled into the urea tank from the urea port of the urea tank, which easily causes the liquid level of urea in the urea tank to float, resulting in an enlarged test data error, but in the embodiment of the present invention, the liquid flow rate and flow rate when the flow pump 20 is used to fill urea into the urea tank 41 can be controlled, so as to reduce the floating amplitude of the liquid level in the urea tank 41, and more preferably, when the flow pump 20 is connected to the urea tank 41, the flow pump 20 is connected to the liquid discharge port of the urea tank 41, so as to prevent the liquid level of urea in the urea tank 41 from floating. Specifically, the drain screw of the drain outlet of the urea tank 41 is first unscrewed, and the joint of the second connection pipe 22 is installed at the drain outlet of the urea tank 41, if the thread is not matched, a raw material tape can be used to be wound on the thread at the joint of the second connection pipe 22 in advance and then installed, and the amount of the raw material tape is determined according to specific situations.
In addition, before connecting the urea tank 41 with the flow pump 20, it can be checked in advance whether the urea tank 41 contains urea or other liquid, and if urea or other liquid exists, a wiping cloth can be used for wiping so as to reduce interference with a subsequent test process.
Step S40, electrically connecting a data acquisition unit 31 with the processor 32 and the urea sensor assembly 40 respectively;
the data collector 31 is electrically connected to the urea sensor assembly 40, specifically, the urea sensor 42, so as to obtain the liquid level change of urea in the urea tank 41 detected by the urea sensor 42, more specifically, after the pin of the urea sensor 42 is defined, the data collector 31 is connected to the corresponding interface.
The processor 32 is electrically connected to the data collector 31, and the processor 31 is also electrically connected to the electronic scale 10 to obtain and display the weight variation of the urea sensor assembly 40 detected by the electronic scale 10, so as to facilitate the comparison and analysis of the actual volume variation value and the theoretical volume variation value of urea on the processor 32.
S50, adjusting the levelness of the urea sensor assembly 40;
after the urea sensor assembly 40 to be tested is mounted and related connection relation is completed, the placement levelness of the urea sensor assembly 40 is adjusted to meet testing requirements, and the influence on a testing result caused by the inclination of the urea sensor assembly 40 is avoided. The method specifically comprises the following steps: the level is placed at the top nameplate of the urea sensor 42 in the urea sensor assembly 40 and the tilt angle is observed, requiring that the horizontal angle not exceed 1, and if it exceeds 1, the horizontal angle of the urea sensor assembly 40 can be adjusted by adjusting the legs of the electronic scale 10 and/or adding shims to the mounting structure. Further, in order to improve the testing accuracy, in the embodiment of the present invention, it is preferable to simultaneously test the levelness of the urea sensor assembly in both the transverse direction and the longitudinal direction, so that both the transverse horizontal angle and the longitudinal horizontal angle do not exceed 1 °.
And S60, starting the data collector 31 and the processor 32, and starting the flow pump 20 to fill or extract urea into or from the urea tank to perform a urea volume filling test and a urea volume consumption test.
After the urea sensor assembly 40 is placed and the levelness is adjusted, the data collector 31 and the processor 32 are started, and the flow pump 20 is started, so that the test can be started. It should be noted that, the sequence among the step S20, the step S30 and the step S40 is not limited, and the step S20, the step S30 and the step S40 are only described as an example in the embodiment of the present invention, and in other embodiments of the present invention, the sequence among the step S20, the step S30 and the step S40 may also be adjusted, for example, the flow pump 20 may be connected to the urea tank 41 and the urea tank 50, the urea sensor assembly 40 to be tested may be mounted on the weighing working surface of the electronic scale 10, and the data collector 31 may be connected to the urea sensor 42 and the processor 32 may be connected to the data collector 31, so long as the connection between the flow pump 20 and the urea tank 41 and the urea tank 50, the connection between the urea sensor assembly 40 and the weighing working surface of the electronic scale 10, the connection between the data collector 42 and the connection between the processor 32 and the data collector 31 are respectively completed before the step S50. Before step S60, the flow pump 20, the urea sensor 42, the data collector 31, and the processor 32 are all connected to the power supply 60 to supply power to the above components.
The urea sensor volume testing method provided by the invention is carried out by using the urea sensor volume testing device 100, urea flows between the urea tank 41 and the urea box 50 through the flow pump 20, compared with a mode of measuring through a measuring cup, the urea sensor volume testing method improves the conveying efficiency and the controllability of the conveying volume of urea, reduces the influence on testing data caused by liquid level floating in the urea tank 41, realizes that the testing time is coordinated by 3 persons at present and can be completed within 6 hours, and can be completed within 3 hours, only one person is needed for operation, so that the testing time is shortened, the testing efficiency is improved, and the testing cost is reduced; the data acquisition unit 31 and the processor 32 are used for acquiring and displaying the liquid level change percentage of the urea in the urea tank 41 detected by the urea sensor 42, compared with a mode of displaying and manually reading data by using an instrument, the problem of time delay of data change is solved, the accuracy of acquiring the liquid level change value of the urea is improved, and the test precision is improved; by transferring the urea sensor volume test from the real vehicle to the urea sensor volume test device 100, the problem of inclination of the urea sensor assembly in the real vehicle test is effectively solved, and the test error is reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.
Claims (9)
1. A urea sensor volume testing device, comprising:
the weight detection component comprises an electronic scale, the electronic scale is used for placing the urea sensor assembly to be tested and weighing the urea sensor assembly so as to detect the weight variation of the urea sensor assembly;
the flow pump is used for connecting one end of the flow pump to the urea sensor assembly, and connecting the other end of the flow pump to a urea tank, and is used for filling urea into a urea tank in the urea sensor assembly or extracting urea from the urea tank;
the data processing component comprises a data collector and a processor, the data collector is electrically connected with the urea sensor assembly to obtain the liquid level change percentage of urea in the urea sensor assembly, the processor is used for converting the weight change amount of the urea sensor assembly into the volume change value of the urea, and the processor is electrically connected with the data collector to display the liquid level change percentage;
a first connection pipe, one end of which is connected with the flow pump and the other end of which is used for connecting to the urea tank; and the number of the first and second groups,
and one end of the second connecting pipe is connected with the flow pump, and the other end of the second connecting pipe is used for being connected to the urea sensor assembly.
2. The urea sensor volume testing device of claim 1, wherein the weight sensing assembly further comprises a level gauge configured to be placed on top of the urea sensor assembly to detect a levelness of the urea sensor assembly.
3. The urea sensor volume testing device of claim 2, wherein the electronic scale comprises a chassis and support legs disposed on a bottom of the chassis, the support legs being adjustably sized in length to cooperate with the level to adjust the levelness of the urea sensor assembly; and/or the presence of a gas in the atmosphere,
the electronic scale has the working face of weighing for supplying the urea sensor assembly is placed, weight detection subassembly still includes supporting structure, supporting structure locates the working face of weighing, the last installation department that still is equipped with of supporting structure is used for supplying the installation of urea sensor assembly, the installation department with the adjustable setting of interval between the working face of weighing, with the spirit level cooperation is used for adjusting the levelness of urea sensor assembly.
4. The urea sensor volume testing device of claim 1, wherein the electronic scale has a minimum weighing capacity of 1000g and a division value of 50g.
5. The urea sensor volume testing device of claim 1, wherein the pump flow rate of the flow pump is 1.5-2L/min.
6. A urea sensor volume testing method is characterized by comprising the following steps:
providing a urea sensor volume testing device according to any one of claims 1-5;
mounting a urea sensor assembly to be tested on a weighing working surface of the electronic scale;
connecting one end of a flow pump to a urea box, and connecting the other end of the flow pump to the urea sensor assembly;
the data acquisition unit is electrically connected with the processor and the urea sensor assembly respectively;
adjusting the levelness of the urea sensor assembly;
and starting the data collector and the processor, and starting the flow pump to fill the urea tank or extract urea from the urea tank, and performing a urea volume filling test and a urea volume consumption test.
7. The urea sensor volume testing method of claim 6, wherein the step of connecting one end of the flow pump to a urea tank and the other end to a urea sensor assembly under test:
one end of the flow pump is connected with a liquid outlet of the urea tank.
8. The urea sensor volume testing method of claim 6, wherein the step of connecting one end of the flow pump to a urea tank and the other end to a urea sensor assembly under test comprises:
and connecting one end of the flow pump with the urea tank through a first connecting pipe, and connecting the other end of the flow pump with the urea sensor assembly through a second connecting pipe.
9. The method for urea sensor volume measurement according to claim 6, wherein the step of mounting the urea sensor assembly after the flow pump on a weighing surface of the electronic scale and adjusting the levelness of the urea sensor assembly comprises:
and installing the urea sensor assembly connected with the flow pump on a weighing working surface of the electronic scale, and adjusting the levelness of the urea sensor assembly in the transverse direction and the longitudinal direction to ensure that the transverse levelness and the longitudinal levelness are not higher than 1 degree.
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