A method, device, medium and equipment for aging a probe of a nitrogen and oxygen sensor

Abstract

The present invention discloses a probe aging method, device, medium and equipment for a nitrogen oxygen sensor, the method comprising: generating multiple aging concentration intervals of the aging process according to the test range of the nitrogen oxygen sensor; selecting a target aging concentration interval from the multiple aging concentration intervals to generate an initial aging strategy; placing multiple nitrogen oxygen sensor probes to be aged into a preset gas pipeline, introducing aging gas into the preset gas pipeline, controlling the current concentration of the aging gas according to the initial aging strategy, and adjusting the aging time of each aging stage in real time according to the detection deviation change state of the nitrogen oxygen sensor in each aging stage until the aging process ends, so as to achieve a stable detection state of the nitrogen oxygen sensor probe. The present invention is more targeted in setting the concentration of the aging gas, and can flexibly adjust the actual aging time of each aging stage according to the aging state, thereby improving the aging efficiency and aging effect as well as the accuracy and stability of the nitrogen oxygen sensor in practical applications.

Description

Technical Field

[0001] The invention relates to the field of automobile exhaust treatment, and in particular to a probe aging method, device, medium and equipment for a nitrogen oxygen sensor. Background Art

[0002] Nitrogen oxide sensors are mainly used in diesel engine exhaust treatment systems. Usually, there are at least two nitrogen oxide sensors in the exhaust pipe, which are installed before the three-way catalytic converter and after the SCR. The former oxygen is used to detect the O2 content and NOx concentration of the exhaust gas and feed it back to the ECU for adjustment. The latter oxygen is used to detect the working efficiency of the three-way catalytic converter and SCR. Therefore, the measurement accuracy of the nitrogen oxide sensor is crucial to the vehicle after-treatment system. When the nitrogen oxide sensor is working, the exhaust gas enters each chamber of the ceramic chip in turn, and the oxygen electrode continuously removes the O2 in the exhaust gas, and the treated NO exhaust gas is passed into the measuring pump. The measuring pump pumps oxygen and feeds back the exhaust gas concentration value in the form of limiting current to the electronic control unit. The electronic control unit communicates with the vehicle control center through the CAN bus, and sends the NOx and O2 concentrations to the vehicle CAN bus in real time to reduce the emission of NOx in the exhaust gas.

[0003] In order to improve the stability and accuracy of nitrogen oxide sensors in actual detection, nitrogen oxide sensors need to be aged before leaving the factory. The prior art usually performs a cyclic aging test on nitrogen oxide sensors in an air environment, which lasts for a long time and has low efficiency. The patent with application number 202110707121.X proposes an aging method for nitrogen oxide sensors. By changing the concentration of the aging gas, the nitrogen oxide sensor to be aged reaches a stable state of electrode gain. Although the aging speed can be increased, the aging gas concentration and the duration of each concentration in this scheme are pre-set and fixed during the aging process. In actual use, the aging gas concentration not only cannot cover the measurement range of the nitrogen oxide sensor, but also maintains the same aging gas concentration for too long, which is not conducive to further improving the electrode gain stability and affects the aging efficiency and aging effect. Summary of the invention

[0004] The present invention provides a probe aging method, device, medium and equipment for a nitrogen oxygen sensor, which solve the above-mentioned technical problems.

[0005] A first aspect of an embodiment of the present invention provides a probe aging method for a nitrogen oxygen sensor, comprising the following steps:

[0006] Step 1, generating a plurality of aging concentration intervals of an aging process according to a test range of the nitrogen oxygen sensor;

[0007] Step 2, selecting a target aging concentration interval and a target aging duration corresponding to each target aging concentration interval from the multiple aging concentration intervals, and generating an initial aging strategy, wherein each changing target aging concentration interval in the initial aging strategy corresponds to an aging stage;

[0008] Step 3, placing multiple nitrogen oxide sensor probes to be aged into a preset gas pipeline, introducing aging gas into the preset gas pipeline, controlling the current concentration of the aging gas according to the initial aging strategy, and adjusting the target aging time corresponding to each aging stage in real time according to the detection deviation change state of the nitrogen oxide sensor in each aging stage until the aging process is completed, so as to achieve a stable detection state of the nitrogen oxide sensor probe.

[0009] A second aspect of an embodiment of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the above-mentioned method for aging a probe of a nitrogen oxygen sensor is implemented.

[0010] A third aspect of an embodiment of the present invention provides a probe aging device for a nitrogen oxide sensor, comprising a computer-readable storage medium and a processor, wherein the processor implements the steps of the above-mentioned probe aging method for the nitrogen oxide sensor when executing a computer program on the computer-readable storage medium.

[0011] A fourth aspect of an embodiment of the present invention provides a probe aging device for a nitrogen oxygen sensor, comprising an interval generation module, a strategy generation module and an aging module.

[0012] The interval generation module is used to generate a plurality of aging concentration intervals of the aging process according to the test range of the nitrogen oxygen sensor;

[0013] The strategy generation module is used to select a target aging concentration interval and a target aging duration corresponding to each target aging concentration interval from the multiple aging concentration intervals, and generate an initial aging strategy, wherein each changing target aging concentration interval in the initial aging strategy corresponds to an aging stage;

[0014] The aging module is used to place a plurality of nitrogen oxide sensor probes to be aged into a preset gas pipeline, introduce aging gas into the preset gas pipeline, control the current concentration of the aging gas according to the initial aging strategy, and adjust the target aging time corresponding to each aging stage in real time according to the detection deviation change state of the nitrogen oxide sensor in each aging stage until the aging process is completed, so as to achieve a stable detection state of the nitrogen oxide sensor probe.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a probe aging method, device, medium and equipment for a nitrogen oxygen sensor. Compared with the prior art, not only is the concentration of the aging gas set more targeted, but the actual aging time of each aging stage can be flexibly adjusted according to the aging state, thereby improving the aging efficiency and aging effect, as well as the accuracy and stability of the nitrogen oxygen sensor in practical applications.

[0016] In order to make the above-mentioned objects, features and advantages of the invention more obvious and easy to understand, the preferred embodiments of the present invention are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic flow chart of a method for aging a probe of a nitrogen oxygen sensor provided by an embodiment;

[0019] Figure 2 is a flow chart of step 1 in a probe aging method for a nitrogen oxygen sensor provided by an embodiment;

[0020] Figure 3 is a flow chart of step 2 in a method for aging a probe of a nitrogen oxygen sensor provided by an embodiment;

[0021] Figure 4 is a flow chart of step 3 in a probe aging method for a nitrogen oxygen sensor provided by an embodiment;

[0022] Figure 5 is a flow chart of step 3 in a probe aging method for a nitrogen oxygen sensor provided by another embodiment;

[0023] Figure 6 is a schematic structural diagram of a probe aging device for a nitrogen and oxygen sensor provided by an embodiment;

[0024] Figure 7 The diagram is a schematic diagram of the structure of a probe aging device for a nitrogen oxygen sensor provided in an embodiment. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, all within the scope of protection of the present invention. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a different order from the module division in the device or the flow chart. Furthermore, the words "first", "second", "third", etc. used in the present invention do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0027] Figure 1 1 is a schematic diagram of a flow chart of a method for aging a probe of a nitrogen oxygen sensor provided in Example 1. Figure 1 As shown, the following steps are included:

[0028] Step 1: generating a plurality of aging concentration intervals of an aging process according to a test range of the nitrogen oxygen sensor.

[0029] In a specific embodiment, for step 1, the number n of the aging concentration intervals can be pre-set, and then the test range of the nitrogen oxide sensor is evenly divided according to the number n. For example, the test range of a nitrogen oxide sensor is 0-5000ppm, and n is 5, that is, 5 aging concentration intervals can be generated, namely: 0-1000ppm, 1000-2000ppm, 2000-3000ppm, 3000-4000ppm and 4000-5000ppm.

[0030] In other embodiments, the test range of the nitrogen oxide sensor can be divided into multiple aging concentration intervals in combination with the historical nitrogen oxide concentration emission data of automobile exhaust, such as Figure 2 As shown, specifically:

[0031] Step 101, obtaining historical nitrogen and oxygen concentration emission data of automobile exhaust, clustering the historical nitrogen and oxygen concentration emission data using a preset clustering method, such as a K-means clustering method, to generate a concentrated nitrogen and oxygen concentration emission interval;

[0032] Step 102, dividing the test range of the nitrogen oxide sensor probe, the division result includes a first range interval, a second range interval and a third range interval in which the nitrogen oxide concentration increases in sequence, and the second range interval is the nitrogen oxide concentration concentrated emission interval;

[0033] Step 103: Obtain the number of aging concentration intervals corresponding to the first range interval, the second range interval, and the third range interval, respectively, and generate at least one aging concentration interval corresponding to each range interval.

[0034] For example, in one embodiment, the test range of the nitrogen oxide sensor is 0-5000ppm, and the concentrated emission interval of nitrogen oxide concentration is 500-2000ppm. First, the test range of the nitrogen oxide sensor is divided into: the first range interval 0-500, the second range interval 500-2000, and the third range interval 2000-5000; by querying the preset mapping relationship table, the number of aging concentration intervals of the first range interval, the second range interval and the third range interval are 1, 3, and 2 respectively, and then multiple aging concentration intervals can be generated: 0-500, 500-1000, 1000-1500, 1500-2000, 2000-3500 and 3500-5000. The above preset mapping relationship table can be established according to the historical nitrogen oxide concentration emission data of automobile exhaust gas, the number of aging concentration intervals of the second range interval is a set value (fixed value), and the larger the interval range of the first range interval and the third range interval, the more corresponding aging concentration intervals. By adopting the above method, the concentration of the aging gas can cover the entire test range of the nitrogen oxide sensor, thereby improving the aging effect.

[0035] Then, step 2 is performed to select a target aging concentration interval and a target aging time corresponding to each target aging concentration interval from the multiple aging concentration intervals, and generate an initial aging strategy, wherein each changing target aging concentration interval in the initial aging strategy corresponds to an aging stage, so that different aging gas concentrations are obtained under different working conditions according to actual conditions, and the aging process is more flexible.

[0036] In a specific embodiment, Figure 3 As shown, the above step 2 specifically includes the following steps:

[0037] Step 201, simulating the overall concentration change curve of the aging gas according to the change data of nitrogen oxygen concentration in the exhaust emission under different working conditions, for example, in the first time period, the nitrogen oxygen concentration shows an upward trend in the range of 200-300PM, in the second time period, the nitrogen oxygen concentration continues to show an upward trend in the range of 1200-2000PM, and in the third time period, the nitrogen oxygen concentration shows a downward trend in the range of 900-1200PM.

[0038] Step 202, select a target aging concentration interval from the multiple aging concentration intervals according to the overall concentration change curve of the aging gas, and associate a corresponding target aging duration with each target aging concentration interval, where the target aging duration of each target aging concentration interval can be obtained by querying a preset schedule, and the preset schedule is established and updated according to historical aging data. For example, under the nitrogen and oxygen concentration change curve illustrated in step 201, the target aging concentration intervals closest to the nitrogen and oxygen concentration change curve can be selected as follows: 0-500, 1500-2000 and 1000-1500, and the corresponding target aging durations are 2 hours, 3 hours and 3 hours.

[0039] Step 203, sorting the target aging concentration intervals, for example, generating an initial aging strategy according to a gradually increasing or decreasing aging concentration value or a nitrogen and oxygen concentration variation curve, so that the obtained initial aging strategy is more flexible and targeted.

[0040] Finally, step 3 is performed, and multiple nitrogen oxygen sensor probes to be aged are placed into a preset gas pipeline, and aging gas is introduced into the preset gas pipeline, and the current concentration of the aging gas is controlled according to the initial aging strategy, and the target aging time corresponding to each aging stage is adjusted in real time according to the detection deviation change state of the nitrogen oxygen sensor in each aging stage, until the aging process is completed, so as to achieve a stable detection state of the nitrogen oxygen sensor probe. The specific implementation method can refer to the prior art to set up a solenoid valve, an aging gas source, a pressure regulating tank, an aging gas pipeline, etc., which will not be described in detail here.

[0041] It is understandable that during the aging process of step 3, a target concentration value (such as the middle value of the target aging concentration interval) can be selected from each target aging concentration interval, and the current concentration of the aging gas can be kept stable at the target concentration value in the corresponding aging stage. In other embodiments, the interval concentration change curve corresponding to the target aging concentration interval can also be simulated (such as a uniform change within the interval range), and the current concentration of the aging gas can be adjusted according to the interval concentration change curve in the corresponding aging stage.

[0042] In a specific embodiment, Figure 4 As shown, in step 3, the target aging time corresponding to each aging stage is adjusted in real time according to the detection deviation change state of the nitrogen oxide sensor in each aging stage, specifically:

[0043] Step 301, acquiring a detection value of each nitrogen oxide sensor at a preset frequency, and generating a detection deviation of each nitrogen oxide sensor at each detection moment, wherein the detection deviation is a difference between the detection value and a preset standard value;

[0044] Step 302, calculating the average detection deviation of all nitrogen oxide sensor probes at each detection moment, and generating a change in the average detection deviation at adjacent detection moments;

[0045] Step 303: When the variation of the average detection deviation is less than the corresponding first preset value, the current aging stage is ended and the next aging stage is entered.

[0046] In another preferred embodiment, Figure 5 As shown, in step 3, the target aging time corresponding to each aging stage is adjusted in real time according to the detection deviation change state of the nitrogen oxide sensor in each aging stage, specifically:

[0047] Step 304, acquiring a detection value of each nitrogen oxide sensor at a preset frequency, and generating a detection deviation of each nitrogen oxide sensor at each detection moment, wherein the detection deviation is a difference between the detection value and a preset standard value;

[0048] Step 305, generating a continuous detection deviation change corresponding to each of the nitrogen oxygen sensor probes at adjacent detection moments;

[0049] Step 306: When the continuous detection deviation variation of any nitrogen oxide sensor probe is within the corresponding preset fluctuation range, the current aging stage is ended and the next aging stage is entered.

[0050] The above embodiments can all adjust the actual aging time in real time according to the detection deviation changes in the current aging stage, such as the detection deviation change amplitude or the detection deviation change speed, and enter the next aging stage in time after achieving the electrode gain stabilization effect in the current aging stage, thereby improving the aging efficiency and effect.

[0051] In the aging stage of step 3 of another preferred embodiment, when the target aging time of the current aging stage ends and before entering the next aging stage, the current average detection deviation of all nitrogen oxide sensor probes is calculated. If the current average detection deviation is greater than a second preset value, the current aging stage is continued until the upper limit of the duration of the current aging stage is reached, thereby ensuring the aging effect of each aging stage and avoiding the duration of the same aging stage being too long.

[0052] It is understandable that different probe preheating temperatures will affect the change in detection deviation at each aging stage. Therefore, in a specific embodiment, the current preset temperature can be obtained, and the corresponding first preset value, second preset value, and preset fluctuation range can be generated according to the current preheating temperature to further improve the aging effect of the technical solution.

[0053] The above embodiments provide multiple specific implementation plans for the probe aging method of the nitrogen oxygen sensor, which not only makes the concentration of the aging gas more targeted, but also allows the actual aging time of each aging stage to be flexibly adjusted according to the aging status, thereby improving the aging efficiency and aging effect, as well as the accuracy and stability of the nitrogen oxygen sensor in practical applications.

[0054] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0055] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the above-mentioned method for aging a probe of a nitrogen oxygen sensor is implemented.

[0056] Figure 6 is a schematic diagram of the structure of the probe aging device of the nitrogen oxygen sensor provided in Example 2, such as Figure 6 As shown, it includes an interval generation module 100, a strategy generation module 200 and an aging module 300.

[0057] The interval generation module 100 is used to generate a plurality of aging concentration intervals of the aging process according to the test range of the nitrogen oxygen sensor;

[0058] The strategy generation module 200 is used to select a target aging concentration interval and a target aging duration corresponding to each target aging concentration interval from the multiple aging concentration intervals, and generate an initial aging strategy, wherein each changing target aging concentration interval in the initial aging strategy corresponds to an aging stage;

[0059] The aging module 300 is used to place a plurality of nitrogen oxide sensor probes to be aged into a preset gas pipeline, introduce aging gas into the preset gas pipeline, control the current concentration of the aging gas according to the initial aging strategy, and adjust the target aging time corresponding to each aging stage in real time according to the detection deviation change state of the nitrogen oxide sensor in each aging stage until the aging process is completed, so as to achieve a stable detection state of the nitrogen oxide sensor probe.

[0060] The above embodiments provide a probe aging device for a nitrogen oxygen sensor, which not only sets the concentration of the aging gas more specifically, but also can flexibly adjust the actual aging time of each aging stage according to the aging state, thereby improving the aging efficiency and aging effect, as well as the accuracy and stability of the nitrogen oxygen sensor in practical applications.

[0061] An embodiment of the present invention further provides a probe aging device for a nitrogen oxide sensor, comprising a computer-readable storage medium and a processor, wherein the processor implements the steps of the above-mentioned probe aging method for the nitrogen oxide sensor when executing a computer program on the computer-readable storage medium.

[0062] Figure 7 : is a schematic diagram of the structure of the probe aging equipment of the nitrogen and oxygen sensor provided in Example 3 of the present invention, such as Figure 7 As shown, the probe aging device 8 of the nitrogen and oxygen sensor of this embodiment includes: a processor 80, a readable storage medium 81, and a computer program 82 stored in the readable storage medium 81 and executable on the processor 80. When the processor 80 executes the computer program 82, the steps in the above-mentioned various method embodiments are implemented, for example Figure 1 Alternatively, when the processor 80 executes the computer program 82, the functions of each module in the above-mentioned device embodiments are realized, for example Figure 6 Functionality of the modules shown.

[0063] Exemplarily, the computer program 82 may be divided into one or more modules, which are stored in the readable storage medium 81 and executed by the processor 80 to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 82 in the probe aging device 8 of the nitrogen oxide sensor.

[0064] The probe aging device 8 of the nitrogen and oxygen sensor may include, but is not limited to, a processor 80 and a readable storage medium 81. Those skilled in the art will understand that Figure 7 It is only an example of the probe aging device 8 of the nitrogen oxygen sensor and does not constitute a limitation of the probe aging device 8 of the nitrogen oxygen sensor. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the probe aging device of the nitrogen oxygen sensor may also include a power management module, an operation processing module, an input and output device, a network access device, a bus, etc.

[0065] The processor 80 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0066] The readable storage medium 81 may be an internal storage unit of the probe aging device 8 of the nitrogen oxygen sensor, such as a hard disk or memory of the probe aging device 8 of the nitrogen oxygen sensor. The readable storage medium 81 may also be an external storage device of the probe aging device 8 of the nitrogen oxygen sensor, such as a plug-in hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash card (FlashCard), etc. equipped on the probe aging device 8 of the nitrogen oxygen sensor. Further, the readable storage medium 81 may also include both an internal storage unit and an external storage device of the probe aging device 8 of the nitrogen oxygen sensor. The readable storage medium 81 is used to store the computer program and other programs and data required by the probe aging device of the nitrogen oxygen sensor. The readable storage medium 81 may also be used to temporarily store data that has been output or is to be output.

[0067] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0068] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] Those of ordinary skill in the art will appreciate that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0070] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0071] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0072] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0073] The present invention is not limited to what is described in the specification and implementation modes, and therefore additional advantages and modifications can be easily realized by those skilled in the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A method for aging a probe of a nitrogen oxygen sensor, characterized in that: The following steps are involved: Step 1, generating a plurality of aging concentration intervals of an aging process according to a test range of the nitrogen oxygen sensor; Step 2, selecting a target aging concentration interval and a target aging duration corresponding to each target aging concentration interval from the multiple aging concentration intervals, and generating an initial aging strategy, wherein each changing target aging concentration interval in the initial aging strategy corresponds to an aging stage; Step 3, placing a plurality of nitrogen oxide sensor probes to be aged into a preset gas pipeline, introducing an aging gas into the preset gas pipeline, controlling the current concentration of the aging gas according to the initial aging strategy, and adjusting the target aging time corresponding to each aging stage in real time according to the detection deviation change state of the nitrogen oxide sensor in each aging stage until the aging process is completed, so as to achieve a stable detection state of the nitrogen oxide sensor probe; A plurality of aging concentration intervals of the aging process are generated according to the test range of the nitrogen oxygen sensor, specifically: Step 101, obtaining historical nitrogen and oxygen concentration emission data of automobile exhaust, clustering the historical nitrogen and oxygen concentration emission data using a preset clustering method, and generating a concentrated nitrogen and oxygen concentration emission interval; Step 102, dividing the test range of the nitrogen oxide sensor probe, the division result includes a first range interval, a second range interval and a third range interval in which the nitrogen oxide concentration increases in sequence, and the second range interval is the nitrogen oxide concentration concentrated emission interval; Step 103, obtaining the number of aging concentration intervals corresponding to the first range interval, the second range interval, and the third range interval, respectively, and generating at least one aging concentration interval corresponding to each range interval; A target aging concentration interval and a target aging duration corresponding to each target aging concentration interval are selected from the multiple aging concentration intervals, and an initial aging strategy is generated, specifically: Step 201, simulating the overall concentration change curve of the aged gas according to the change data of nitrogen and oxygen concentration in the tail gas emission under different working conditions; Step 202, selecting a target aging concentration interval from the multiple aging concentration intervals according to the overall concentration change curve of the aging gas, and associating a corresponding target aging time with each target aging concentration interval; Step 203: sort the target aging concentration intervals to generate an initial aging strategy.

2. The probe aging method of the nitrogen oxygen sensor according to claim 1 is characterized in that: During the aging process of step 3, a target concentration value is selected from each target aging concentration interval, and the current concentration of the aging gas is kept stable at the target concentration value in the corresponding aging stage; and / or an interval concentration change curve corresponding to the target aging concentration interval is simulated, and the current concentration of the aging gas is adjusted according to the interval concentration change curve in the corresponding aging stage.

3. The probe aging method of the nitrogen oxygen sensor according to claim 2 is characterized in that: According to the detection deviation change state of the nitrogen oxide sensor in each aging stage, the target aging time corresponding to each aging stage is adjusted in real time, specifically: Step 301, acquiring a detection value of each nitrogen oxide sensor at a preset frequency, and generating a detection deviation of each nitrogen oxide sensor at each detection moment, wherein the detection deviation is a difference between the detection value and a preset standard value; Step 302, calculating the average detection deviation of all nitrogen oxide sensor probes at each detection moment, and generating a change in the average detection deviation at adjacent detection moments; Step 303: When the variation of the average detection deviation is less than the corresponding first preset value, the current aging stage is ended and the next aging stage is entered.

4. The probe aging method of the nitrogen oxygen sensor according to claim 2 is characterized in that: According to the detection deviation change state of the nitrogen oxide sensor in each aging stage, the target aging time corresponding to each aging stage is adjusted in real time, specifically: Step 304, acquiring a detection value of each nitrogen oxide sensor at a preset frequency, and generating a detection deviation of each nitrogen oxide sensor at each detection moment, wherein the detection deviation is a difference between the detection value and a preset standard value; Step 305, generating a continuous detection deviation change corresponding to each of the nitrogen oxygen sensor probes at adjacent detection moments; Step 306: When the continuous detection deviation variation of any nitrogen oxide sensor probe is within the corresponding preset fluctuation range, the current aging stage is ended and the next aging stage is entered.

5. The probe aging method of the nitrogen oxygen sensor according to claim 2 is characterized in that: According to the detection deviation change state of the nitrogen oxide sensor in each aging stage, the target aging time corresponding to each aging stage is adjusted in real time, specifically: When the target aging time of the current aging stage ends and before entering the next aging stage, the current average detection deviation of all nitrogen oxide sensor probes is calculated. If the current average detection deviation is greater than the second preset value, the current aging stage continues until the upper limit of the duration of the current aging stage is reached.

6. A probe aging device for a nitrogen oxygen sensor, based on the probe aging method for a nitrogen oxygen sensor according to any one of claims 1 to 5, characterized in that: Including interval generation module, strategy generation module and aging module, The interval generation module is used to generate a plurality of aging concentration intervals of the aging process according to the test range of the nitrogen oxygen sensor; The strategy generation module is used to select a target aging concentration interval and a target aging duration corresponding to each target aging concentration interval from the multiple aging concentration intervals, and generate an initial aging strategy, wherein each changing target aging concentration interval in the initial aging strategy corresponds to an aging stage; The aging module is used to place a plurality of nitrogen oxide sensor probes to be aged into a preset gas pipeline, introduce aging gas into the preset gas pipeline, control the current concentration of the aging gas according to the initial aging strategy, and adjust the target aging time corresponding to each aging stage in real time according to the detection deviation change state of the nitrogen oxide sensor in each aging stage until the aging process is completed, so as to achieve a stable detection state of the nitrogen oxide sensor probe.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the probe aging method of the nitrogen oxide sensor according to any one of claims 1 to 5 is implemented.

8. A probe aging device for a nitrogen and oxygen sensor, comprising a computer-readable storage medium and a processor, characterized in that: When the processor executes the computer program on the computer-readable storage medium, the processor implements the steps of the probe aging method of the nitrogen oxide sensor according to any one of claims 1 to 5.

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