CN118036351B - Anti-interference method, device, medium and equipment for nitrogen-oxygen sensor - Google Patents
Anti-interference method, device, medium and equipment for nitrogen-oxygen sensor Download PDFInfo
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- CN118036351B CN118036351B CN202410444833.0A CN202410444833A CN118036351B CN 118036351 B CN118036351 B CN 118036351B CN 202410444833 A CN202410444833 A CN 202410444833A CN 118036351 B CN118036351 B CN 118036351B
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- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 91
- 238000013461 design Methods 0.000 claims abstract description 59
- 238000005259 measurement Methods 0.000 claims abstract description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 27
- 239000000919 ceramic Substances 0.000 claims description 25
- 238000011217 control strategy Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
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- 239000007789 gas Substances 0.000 abstract description 9
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- 230000009467 reduction Effects 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical class ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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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 provides an anti-interference method, device, medium and equipment of a nitrogen-oxygen sensor, wherein the method comprises the following steps: obtaining a design parameter value of a nitrogen-oxygen sensor; and acquiring interference pulse current information, and establishing an anti-interference structural scheme of the nitrogen-oxygen sensor by combining design parameter values, wherein the anti-interference structural scheme comprises a circuit structure, component selection and/or PCB layout of each non-heating module. The invention firstly confirms the interference degree of the pulse heating module in the design stage of the nitrogen-oxygen sensor, then combines the target values of important parameters to carry out anti-interference design on other modules from a plurality of aspects such as component selection, circuit structure, PCB layout and the like, and simultaneously considers the influence of the reduction of the thickness of the insulation layer covered by the outer layer of the pulse heating module on interference current and compensates the interference current in the actual use process, thereby further increasing the accuracy of the actual measurement result of the nitrogen-oxygen sensor and improving the tail gas purification effect of the diesel engine.
Description
Technical Field
The invention relates to the field of nitrogen and oxygen sensors, in particular to an anti-interference method, device, medium and equipment of a nitrogen and oxygen sensor.
Background
Nitrogen oxides, ammonia gas and the like are common gas compounds polluting the atmosphere, and a large amount of nitrogen oxides, ammonia gas and the like come from diesel vehicle tail gas and boiler combustion tail gas. In order to control and reduce the emission of nitrogen oxides, strict policy regulations are being put into place in various countries around the world. At present, a common treatment method for nitrogen oxides is selective reduction catalysis, namely, nitrogen oxides are neutralized by utilizing substances with strong reducibility, so that neutral compounds without pollution, such as water, nitrogen and the like, are formed. In order to use the catalytic reduction device more efficiently, save the cost and avoid secondary pollution, the device must be equipped with a nitrogen oxide sensor to detect the concentration value of the nitrogen oxide to determine the usage amount of the reducing substance. When the concentration detection value of the oxynitride in the tail gas reaches a threshold value, the selective reduction device releases the reducing substances to neutralize the oxynitride, so that the aim of reducing emission is fulfilled. Therefore, the nitrogen-oxygen sensor plays a very important role. When the nitrogen-oxygen sensor is used, the ceramic chip is required to be heated to 800 ℃ by the electronic control unit, the electronic control unit in the prior art usually adopts pulse heating, A-level pulse current can be generated during normal operation, the pulse current can generate larger interference on signals of other functional modules, and particularly, the influence on the nitrogen-oxygen concentration signal of the nA-level is obvious, so that the nitrogen-oxygen concentration measurement result is inaccurate. In the prior art, the measured value of the nitrogen-oxygen concentration is usually corrected and compensated according to the concentration of NO2, the concentration of NH3, the back pressure parameter and the like in the tail gas in the actual measurement process, and the influence of the interference pulse current on signal acquisition is not considered in the compensation process, so that the detection accuracy of the nitrogen-oxygen sensor is still influenced.
Disclosure of Invention
The invention provides an anti-interference method, device, medium and equipment for a nitrogen-oxygen sensor, which solve the technical problems.
The technical scheme for solving the technical problems is as follows: an anti-interference method of a nitrogen-oxygen sensor, wherein an electric control unit of the nitrogen-oxygen sensor comprises a pulse heating module and a non-heating module, and the method comprises the following steps:
step 1, obtaining a design parameter value of a nitrogen-oxygen sensor;
and 2, acquiring interference pulse current information corresponding to the pulse heating modules, and establishing an anti-interference structural scheme of the nitrogen-oxygen sensor by combining the design parameter values, wherein the anti-interference structural scheme comprises a circuit structure, component selection and/or PCB layout of each non-heating module.
In a preferred embodiment, the non-heating module includes at least one of a power module, a signal acquisition module, a digital-to-analog conversion module, a signal processing module, and a CAN bus communication module.
In a preferred embodiment, the design parameter values include cold start duration, response duration, measurement accuracy, and/or operating voltage.
In a preferred embodiment, the pulse heating module comprises a heating electrode arranged in a ceramic chip, and the outer surface of the heating electrode is uniformly covered with an insulating layer;
The obtaining of the interference pulse current information corresponding to the pulse heating module specifically includes: and changing the thickness of the insulating layer, heating the head temperature of the ceramic chip to a target temperature by adopting the pulse heating module under different thicknesses, collecting interference pulse current information generated by the pulse heating module, and establishing a corresponding relation table of the thickness of the insulating layer and the interference pulse current.
In a preferred embodiment, step 2 establishes an anti-interference structural scheme of the nitrogen-oxygen sensor based on the maximum interference pulse current of the correspondence table, and includes the following steps:
S201, acquiring an alternative design scheme of each non-heating module, wherein the alternative design scheme comprises an alternative circuit structure, an alternative component type and/or an alternative PCB layout of each non-heating module;
s202, obtaining structural information of a ceramic chip in the nitrogen-oxygen sensor, and generating a target control strategy according to the design parameter value;
S203, generating an anti-interference structural scheme of the nitrogen-oxygen sensor from the alternative design schemes based on the target control strategy and the maximum interference pulse current.
In a preferred embodiment, the method further comprises the steps of:
Acquiring an attenuation coefficient of the insulating layer, and generating the current thickness of the insulating layer according to the attenuation coefficient;
inquiring the corresponding relation table to generate real-time interference pulse current information corresponding to the insulating layer with the current thickness;
And compensating the nitrogen-oxygen concentration detection value of the nitrogen-oxygen sensor according to the real-time interference pulse current information.
A second aspect of the embodiments of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the above-described anti-interference method of a nitrogen-oxygen sensor.
A third aspect of the embodiments of the present invention provides an anti-interference device for a nitrogen-oxygen sensor, including the computer readable storage medium and a processor, where the processor implements the steps of the anti-interference method for a nitrogen-oxygen sensor when executing a computer program on the computer readable storage medium.
A fourth aspect of the embodiment of the present invention provides an anti-interference device of a nitrogen-oxygen sensor, where an electronic control unit of the nitrogen-oxygen sensor includes a pulse heating module and a non-heating module, the anti-interference device includes an acquisition module and a construction module,
The acquisition module is used for acquiring the design parameter value of the nitrogen-oxygen sensor;
The construction module is used for acquiring interference pulse current information corresponding to the pulse heating module, and establishing an anti-interference structural scheme of the nitrogen-oxygen sensor by combining the design parameter values, wherein the anti-interference structural scheme comprises a circuit structure, component selection and/or PCB layout of each non-heating module.
In a preferred embodiment, the building block comprises a first acquisition unit, a first generation unit and a second generation unit,
The first acquisition unit is used for acquiring an alternative design scheme of each non-heating module, wherein the alternative design scheme comprises an alternative circuit structure, an alternative component type and/or an alternative PCB layout of each non-heating module;
the first generation unit is used for acquiring the structural information of the ceramic chip in the nitrogen-oxygen sensor and generating a target control strategy according to the design parameter value;
The second generation unit is used for generating an anti-interference structural scheme of the nitrogen-oxygen sensor from the alternative design schemes based on the target control strategy and the maximum interference pulse current.
The invention provides an anti-interference method, device, medium and equipment of a nitrogen-oxygen sensor, which are characterized in that the interference degree of a pulse heating module is firstly confirmed in the design stage of the nitrogen-oxygen sensor, then the anti-interference design is carried out on other modules from a plurality of aspects such as component selection, circuit structure, PCB layout and the like by combining with the target value of important parameters, and meanwhile, the influence of the reduction of the thickness of an insulating layer covered by the outer layer of the pulse heating module on interference current is considered and compensated in the actual use process, so that the accuracy of the actual measurement result of the nitrogen-oxygen sensor is further improved, and the tail gas purification effect of a diesel engine is improved.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of an anti-interference method of a nitrogen-oxygen sensor provided in embodiment 1;
FIG. 2 is a schematic structural diagram of an anti-interference device of the nitrogen-oxygen sensor provided in embodiment 2;
fig. 3 is a schematic structural diagram of an anti-interference device of the nitroxide sensor provided in embodiment 3.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is intended to illustrate the invention, and not to limit the invention.
Fig. 1 is a flow chart of an anti-interference method of the nitrogen-oxygen sensor provided in embodiment 1. The electronic control unit of the nitrogen-oxygen sensor comprises a pulse heating module and a non-heating module. In a specific embodiment, the pulse heating module may adopt a heating electrode disposed in the ceramic chip, and the head of the heating electrode adopts a curved symmetrical design, so as to meet the temperature range requirement of the head when the ceramic chip works, and the head resistance is about 1.5 times of the lead resistance. In a preferred embodiment, the outer surface of the heating electrode, that is, the upper surface and the lower surface of the heating electrode are uniformly covered with the Al2O3 insulating layer, because the YSZ material of the ceramic chip is in an electrically conductive state at a high temperature, and the generated current will interfere with the collection of the sensitive circuit current, so that the output signal of the ceramic chip is disordered. In order to avoid the effect, the surface and the bottom surface of the heating electrode are provided with insulating layers, and the heating electrode is completely wrapped in the insulating layers and isolated from the matrix, so that the interference of current blowby caused by the short and strong interference pulse current accompanying effect of the heating element on the acquisition signal is prevented.
The non-heating module in the electric control unit mainly refers to a power module, a signal acquisition module, a digital-to-analog conversion module, a signal processing module, a CAN bus communication module and the like, wherein the signal acquisition module mainly comprises an oxygen pump basic control circuit and a micro-current detection circuit.
As shown in fig. 1, the anti-interference method of the present embodiment includes the following steps:
Step 1, obtaining design parameter values of the nitrogen-oxygen sensor, wherein the design parameter values mainly comprise cold start time length, response time length, measurement accuracy and/or working voltage and the like, and the design parameter values are different according to different application scenes and application environments of the nitrogen-oxygen sensor.
And then executing step 2, obtaining interference pulse current information corresponding to the pulse heating module, and establishing an anti-interference structural scheme of the nitrogen-oxygen sensor by combining the design parameter values, wherein the anti-interference structural scheme comprises a circuit structure, component selection and/or PCB layout of each non-heating module, so that optimization design is carried out in aspects of component selection, circuit principle design, PCB layout and the like, interference of pulse current of the heating module to other module circuits is effectively avoided, signal anti-interference capability of each functional module is improved, transmission errors are avoided, and measurement accuracy of the sensor is ensured.
In a preferred embodiment, the obtaining the interference pulse current information corresponding to the pulse heating module in step 2 specifically includes: and changing the thickness of the insulating layer, heating the head temperature of the ceramic chip to a target temperature by adopting the pulse heating module under different thicknesses, collecting interference pulse current information generated by the pulse heating module, and establishing a corresponding relation table of the thickness of the insulating layer and the interference pulse current. Specifically, if an insulating layer with a sufficient thickness is provided, no leakage current exists, but in the practical application process, the printing performance, viscosity, wettability with the YSZ matrix and the Pt electrode paste, and the reduction of the insulating layer thickness caused by corrosion of the insulating layer in the daily use process all affect the insulating performance of the insulating layer, that is, the practical magnitude of the leakage current. Therefore, the embodiment establishes a corresponding relation table of the thickness of the insulating layer and the interference pulse current, not only can establish an anti-interference circuit structure of the electric control unit according to the maximum interference pulse current when the insulating property is weakest, but also can correct the actually detected nitrogen-oxygen concentration value according to the change condition of the thickness of the insulating layer in daily use, and further improves the accuracy of nitrogen-oxygen concentration detection.
Specifically, in a preferred embodiment, step 2 establishes an anti-interference structural scheme of the nitroxide sensor based on the maximum interference pulse current of the correspondence table, and the method includes the following steps:
S201, acquiring an alternative design scheme of each non-heating module, wherein the alternative design scheme comprises an alternative circuit structure, an alternative component type and/or an alternative PCB layout of each non-heating module. For example, a database may be established according to historical design data, etc., where the database includes an alternative circuit structure, an alternative component type, and/or an alternative PCB layout for each non-heating module, and keywords such as cost, anti-interference coefficients, etc. are labeled for each alternative design.
S202, obtaining structural information of a ceramic chip in the nitrogen-oxygen sensor, and generating a target control strategy according to the design parameter value. The structural information of the ceramic chip mainly refers to the size and the distribution of each cavity in the ceramic chip, the arrangement position of a main oxygen pump/auxiliary pump/measuring pump in each cavity, the resistance distribution of a heating electrode in the ceramic chip in a pulse heating module and the like. And for ceramic chips with different design parameters and different structures, different control strategies are needed to be adopted, including a heating control strategy for a heating electrode and a combined oxygen pumping strategy for each oxygen pump in the ceramic chip. In this embodiment, a plurality of control methods, such as a staged heating method, a voltage pumping method, a current pumping method, etc., are preset, so that a target control strategy that meets the design parameter value is selected.
S203, generating an anti-interference structural scheme of the nitrogen-oxygen sensor from the alternative design schemes based on the target control strategy and the maximum interference pulse current. For example, a preferred design scheme conforming to a target control strategy is selected from the alternative design schemes, and then a scheme with corresponding anti-interference coefficients is selected from the preferred design scheme according to the range of the maximum interference pulse current to serve as an anti-interference structure scheme of the nitrogen-oxygen sensor.
The anti-interference method of a preferred embodiment further comprises the steps of:
Step 301, obtaining an attenuation coefficient of the insulating layer, and generating the current thickness of the insulating layer according to the attenuation coefficient. The attenuation coefficient is 0-1, and the longer the service time is, the larger the corrosion of the service environment to the insulating layer is, the smaller the attenuation coefficient is, namely the smaller the thickness of the insulating layer is, the larger the real-time interference pulse current generated by the heating module is.
And then, executing step 302, inquiring the corresponding relation table, and generating real-time interference pulse current information corresponding to the insulating layer with the current thickness.
And step 303, compensating the nitrogen-oxygen concentration detection value of the nitrogen-oxygen sensor according to the real-time interference pulse current information. In a specific embodiment, the actual measurement data of the nitrogen-oxygen sensor under different interference pulse currents and the reference data of the non-interference pulse current under the same tail gas condition can be collected in advance, so that a correction model of the nitrogen-oxygen concentration detection value under different interference pulse currents is established, and the nitrogen-oxygen concentration detection value compensation of the step is performed based on the correction model.
The above embodiment provides an anti-interference method for a nitrogen-oxygen sensor, in which the interference degree of a pulse heating module is firstly confirmed in the design stage of the nitrogen-oxygen sensor, then the anti-interference design is carried out on other modules from a plurality of aspects such as component selection, circuit structure, PCB layout and the like by combining with the target value of important parameters, and meanwhile, the influence of the reduction of the thickness of an insulating layer covered by the outer layer of the pulse heating module on interference current is considered and compensated in the actual use process, so that the accuracy of the actual measurement result of the nitrogen-oxygen sensor is further improved, and the effect of purifying tail gas of a diesel engine is improved.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The embodiment of the invention also provides a computer readable storage medium which stores a computer program, and the computer program realizes the anti-interference method of the nitrogen-oxygen sensor when being executed by a processor.
Fig. 2 is a schematic structural diagram of an anti-interference device of a nitrogen-oxygen sensor provided in embodiment 2, as shown in fig. 2, an electronic control unit of the nitrogen-oxygen sensor includes a pulse heating module and a non-heating module, the anti-interference device includes an acquisition module 100 and a construction module 200,
The acquisition module 100 is configured to acquire a design parameter value of the nitrogen-oxygen sensor;
The construction module 200 is configured to obtain interference pulse current information corresponding to the pulse heating module, and establish an anti-interference structural scheme of the nitrogen-oxygen sensor in combination with the design parameter value, where the anti-interference structural scheme includes a circuit structure, component selection and/or PCB layout of each non-heating module.
In a preferred embodiment, the pulse heating module includes a heating electrode disposed in a ceramic chip, an insulating layer is uniformly covered on an outer surface of the heating electrode, the building module 200 includes a first building unit 201, the first building unit 201 is configured to change a thickness of the insulating layer, heat a head temperature of the ceramic chip to a target temperature by using the pulse heating module under different thicknesses, collect interference pulse current information generated by the pulse heating module, and establish a correspondence table between the thickness of the insulating layer and the interference pulse current.
In a preferred embodiment, the construction module 200 further comprises a first acquisition unit 202, a first generation unit 203 and a second generation unit 204,
The first obtaining unit 202 is configured to obtain an alternative design scheme of each non-heating module, where the alternative design scheme includes an alternative circuit structure, an alternative component selection type, and/or an alternative PCB layout of each non-heating module;
The first generating unit 203 is configured to obtain structural information of a ceramic chip in the nitrogen-oxygen sensor, and generate a target control policy according to the design parameter value;
the second generating unit 204 is configured to generate an anti-interference structural scheme of the nitrogen-oxygen sensor from the alternative designs based on the target control strategy and a maximum interference pulse current.
In a preferred embodiment, the anti-interference device further comprises a compensation module 300, and the compensation module 300 comprises:
A second obtaining unit 301, configured to obtain an attenuation coefficient of the insulating layer, and generate a current thickness of the insulating layer according to the attenuation coefficient;
The query unit 302 is configured to query the correspondence table, and generate real-time interference pulse current information corresponding to the insulation layer with the current thickness;
and the compensation unit 303 is used for compensating the nitrogen-oxygen concentration detection value of the nitrogen-oxygen sensor according to the real-time interference pulse current information.
The embodiment of the invention also provides anti-interference equipment of the nitrogen-oxygen sensor, which comprises the computer readable storage medium and a processor, wherein the processor realizes the steps of the anti-interference method of the nitrogen-oxygen sensor when executing the computer program on the computer readable storage medium. Fig. 3 is a schematic structural diagram of an anti-interference device of a nitrogen-oxygen sensor provided in embodiment 3 of the present invention, as shown in fig. 3, an anti-interference device 8 of a nitrogen-oxygen sensor of the 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. The steps of the various method embodiments described above, such as steps 1 through 2 shown in fig. 1, are implemented when the processor 80 executes the computer program 82. Or the processor 80, when executing the computer program 82, performs the functions of the modules of the apparatus embodiments described above, such as the functions of the modules 100-200 shown in fig. 2.
By way of example, the computer program 82 may be partitioned into one or more modules that are stored in the readable storage medium 81 and executed by the processor 80 to perform the present invention. The one or more modules may be a series of computer program instruction segments capable of performing a specific function for describing the execution of the computer program 82 in the tamper resistant device 8 of the nitrogen oxygen sensor.
The tamper resistant device 8 of the nitrogen oxide sensor may include, but is not limited to, a processor 80, a readable storage medium 81. It will be understood by those skilled in the art that fig. 3 is merely an example of the tamper resistant device 8 of the nitroxide sensor, and is not meant to limit the tamper resistant device 8 of the nitroxide sensor, and may include more or less components than illustrated, or may be combined with certain components, or different components, e.g., the tamper resistant device of the nitroxide sensor may further include a power management module, an operation processing module, an input/output device, a network access device, a bus, etc.
The Processor 80 may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), off-the-shelf Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The readable storage medium 81 may be an internal storage unit of the tamper resistant device 8 of the nitroxide sensor, for example a hard disk or a memory of the tamper resistant device 8 of the nitroxide sensor. The readable storage medium 81 may also be an external storage device of the anti-interference 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 memory card (FLASHCARD) or the like, which are provided on the anti-interference 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 tamper resistant device 8 of the nitroxide sensor. The readable storage medium 81 is used to store the computer program and other programs and data required for the tamper resistant device of the nitroxide sensor. The readable storage medium 81 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the elements and method steps of the examples described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or as a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The present invention is not limited to the details and embodiments described herein, and thus additional advantages and modifications may readily be made by those skilled in the art, without departing from the spirit and scope of the general concepts defined in the claims and the equivalents thereof, and the invention is not limited to the specific details, representative apparatus and illustrative examples shown and described herein.
Claims (6)
1. An anti-interference method of a nitrogen-oxygen sensor, wherein an electric control unit of the nitrogen-oxygen sensor comprises a pulse heating module and a non-heating module, and the method is characterized by comprising the following steps:
step 1, obtaining a design parameter value of a nitrogen-oxygen sensor;
Step 2, obtaining interference pulse current information corresponding to the pulse heating modules, and establishing an anti-interference structural scheme of the nitrogen-oxygen sensor by combining the design parameter values, wherein the anti-interference structural scheme comprises a circuit structure, component selection and/or PCB layout of each non-heating module;
The pulse heating module comprises a heating electrode arranged in a ceramic chip, and an insulating layer is uniformly covered on the outer surface of the heating electrode; the obtaining of the interference pulse current information corresponding to the pulse heating module specifically includes: changing the thickness of the insulating layer, heating the head temperature of the ceramic chip to a target temperature by adopting the pulse heating module under different thicknesses, collecting interference pulse current information generated by the pulse heating module, and establishing a corresponding relation table of the thickness of the insulating layer and the interference pulse current;
establishing an anti-interference structural scheme of the nitrogen-oxygen sensor based on the maximum interference pulse current of the corresponding relation table, wherein the anti-interference structural scheme comprises the following steps of:
S201, acquiring an alternative design scheme of each non-heating module, wherein the alternative design scheme comprises an alternative circuit structure, an alternative component type and/or an alternative PCB layout of each non-heating module;
s202, obtaining structural information of a ceramic chip in the nitrogen-oxygen sensor, and generating a target control strategy according to the design parameter value;
s203, generating an anti-interference structural scheme of the nitrogen-oxygen sensor from the alternative design schemes based on the target control strategy and the maximum interference pulse current;
The anti-interference method further comprises the following steps:
Acquiring an attenuation coefficient of the insulating layer, and generating the current thickness of the insulating layer according to the attenuation coefficient;
inquiring the corresponding relation table to generate real-time interference pulse current information corresponding to the insulating layer with the current thickness;
And compensating the nitrogen-oxygen concentration detection value of the nitrogen-oxygen sensor according to the real-time interference pulse current information.
2. The method of claim 1, wherein the non-heating module comprises at least one of a power module, a signal acquisition module, a digital to analog conversion module, a signal processing module, and a CAN bus communication module.
3. The method of claim 1, wherein the design parameter values include cold start duration, response duration, measurement accuracy, and/or operating voltage.
4. An anti-interference device of a nitrogen-oxygen sensor based on the anti-interference method of any one of claims 1-3, characterized in that an electric control unit of the nitrogen-oxygen sensor comprises a pulse heating module and a non-heating module, the anti-interference device comprises an acquisition module, a construction module and a compensation module,
The acquisition module is used for acquiring the design parameter value of the nitrogen-oxygen sensor;
The construction module is used for acquiring interference pulse current information corresponding to the pulse heating module, and establishing an anti-interference structural scheme of the nitrogen-oxygen sensor by combining the design parameter values, wherein the anti-interference structural scheme comprises a circuit structure, component selection and/or PCB layout of each non-heating module;
the pulse heating module comprises a heating electrode arranged in a ceramic chip, the outer surface of the heating electrode is uniformly covered with an insulating layer, the construction module comprises a first construction unit, a first acquisition unit, a first generation unit and a second generation unit,
The first construction unit is used for changing the thickness of the insulating layer, adopting the pulse heating module to heat the head temperature of the ceramic chip to a target temperature under different thicknesses, collecting interference pulse current information generated by the pulse heating module, and establishing a corresponding relation table of the thickness of the insulating layer and the interference pulse current;
The first acquisition unit is used for acquiring an alternative design scheme of each non-heating module, wherein the alternative design scheme comprises an alternative circuit structure, an alternative component type and/or an alternative PCB layout of each non-heating module;
the first generation unit is used for acquiring the structural information of the ceramic chip in the nitrogen-oxygen sensor and generating a target control strategy according to the design parameter value;
the second generation unit is used for generating an anti-interference structural scheme of the nitrogen-oxygen sensor from the alternative design schemes based on the target control strategy and the maximum interference pulse current;
The compensation module includes:
The second acquisition unit is used for acquiring the attenuation coefficient of the insulating layer and generating the current thickness of the insulating layer according to the attenuation coefficient;
The inquiring unit is used for inquiring the corresponding relation table and generating real-time interference pulse current information corresponding to the insulating layer with the current thickness;
And the compensation unit is used for compensating the nitrogen-oxygen concentration detection value of the nitrogen-oxygen sensor according to the real-time interference pulse current information.
5. A computer readable storage medium storing a computer program which, when executed by a processor, implements the tamper resistant method of a nitrogen oxide sensor according to any one of the preceding claims 1-3.
6. An anti-tamper device for a nitrogen-oxygen sensor comprising a processor and the computer readable storage medium of claim 5, the processor implementing the steps of the anti-tamper method for a nitrogen-oxygen sensor of any one of claims 1-3 when executing a computer program on the computer readable storage medium.
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