Rail pressure sensor electromagnetic interference detection method, device and equipment and storage medium

Abstract

The invention discloses a rail pressure sensor electromagnetic interference detection method, device and equipment and a storage medium. The method comprises the steps of collecting output signals of a rail pressure sensor in real time; processing the output signal based on a detonation chip to obtain an integral voltage; judging whether the integral voltage is greater than or equal to a preset interference tolerance limit value; and under the condition that the integral voltage is greater than or equal to the interference tolerance limit value, the electric control unit sends out early warning information. Electromagnetic interference energy is converted into a voltage signal output form capable of being monitored in real time, the working state of the rail pressure sensor is displayed more visually, maintenance can be conducted in time after the rail pressure sensor is affected by monitoring the magnitude of the interference energy, it is guaranteed that a hardware circuit of the rail pressure sensor cannot be damaged, and the service life of the rail pressure sensor is prolonged. And the problem of sudden abnormal valve flushing in the driving process caused by wrong rail pressure signal output due to hardware circuit fault is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of rail pressure sensors, and in particular to a rail pressure sensor electromagnetic interference detection method, device, equipment and storage medium. Background Art

[0002] With the rapid development of the modern automobile industry, electronic control technology plays an increasingly important role in engine management systems. Rail pressure sensors, as key components in diesel engine electronic control systems, are mainly responsible for monitoring the rail pressure of diesel engines, that is, fuel pressure, to ensure that the engine can obtain appropriate fuel supply under various operating conditions. However, since rail pressure sensors usually work in an environment with high electromagnetic interference, such as various electromagnetic noise sources in the engine compartment, these interferences may cause distortion of the rail pressure sensor output signal, affecting the ECU's accurate judgment of the engine status, and thus causing engine failure.

[0003] At present, rail pressure sensors on the market mainly use software filtering technology to reduce the impact of electromagnetic interference. For example, the valve flushing judgment method that corrects the rail pressure change threshold by obtaining the engine speed and injection amount in real time can eliminate the influence of interference signals on the valve flushing judgment logic to a certain extent, and improve the accuracy of the pressure relief valve flushing judgment. However, these methods mainly focus on filtering at the software level, and do not give enough consideration to the impact of electromagnetic interference at the hardware level. As the equipment is used for a longer time, the decrease in hardware reliability may cause the rail pressure signal change value to exceed the control range, and the problem of abnormal valve flushing will continue to occur, showing the limitations of existing technologies. Summary of the invention

[0004] The embodiments of the present application provide a rail pressure sensor electromagnetic interference detection method, device, equipment and storage medium to at least solve the technical problem in the related art that it is difficult to accurately detect in real time that the rail pressure sensor is affected by electromagnetic interference.

[0005] According to one aspect of an embodiment of the present application, a rail pressure sensor electromagnetic interference detection method is provided, comprising:

[0006] Collect the output signal of rail pressure sensor in real time;

[0007] Processing the output signal based on the knock chip to obtain an integrated voltage;

[0008] Determining whether the integrated voltage is greater than or equal to a preset interference tolerance limit;

[0009] When the integrated voltage is greater than or equal to the interference tolerance limit value, the electronic control unit issues a warning message.

[0010] In one implementation, the processing of the output signal based on the detonation chip to obtain the integrated voltage includes:

[0011] Inputting the output signal into the detonation chip to obtain an output initial integrated voltage;

[0012] The initial integrated voltage is input into an analog-to-digital converter acquisition circuit of an electronic control unit to obtain the acquired integrated voltage.

[0013] In one implementation, before determining whether the integrated voltage is greater than or equal to a preset interference tolerance limit, the method further includes:

[0014] Obtaining an electromagnetic interference energy limit value of the rail pressure sensor;

[0015] The electromagnetic interference energy limit is processed based on the knock chip to obtain an output integral voltage limit, and the integral voltage limit is used as the interference tolerance limit.

[0016] In one embodiment, after the electronic control unit issues a warning message, the method further includes:

[0017] One or more warning information including warning time, rail pressure sensor state, integrated voltage value, and rail pressure sensor identification is stored in the historical fault record;

[0018] Based on the historical fault records, electromagnetic compatibility rectification is performed on the engine working environment.

[0019] In one embodiment, it further includes:

[0020] The output signal of the rail pressure sensor collected in real time is directly input into the analog-to-digital converter collection circuit of the electronic control unit to obtain the collected rail pressure signal.

[0021] In one embodiment, after the electronic control unit issues a warning message, the method further includes:

[0022] Controls the normal operation of the engine.

[0023] According to another aspect of the embodiment of the present application, a rail pressure sensor electromagnetic interference detection device is provided, comprising:

[0024] An acquisition module is used to acquire the output signal of the rail pressure sensor in real time;

[0025] An integration module, used for processing the output signal based on the knock chip to obtain an integrated voltage;

[0026] A judging module, used for judging whether the integrated voltage is greater than or equal to a preset interference tolerance limit;

[0027] The early warning module is used for the electronic control unit to issue an early warning message when the integrated voltage is greater than or equal to the interference tolerance limit value.

[0028] In one embodiment, it further includes:

[0029] The integration module is specifically used to input the output signal into the knock chip to obtain an output initial integration voltage;

[0030] The initial integrated voltage is input into an analog-to-digital converter acquisition circuit of an electronic control unit to obtain the acquired integrated voltage.

[0031] According to another aspect of the embodiments of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the rail pressure sensor electromagnetic interference detection method through the computer program.

[0032] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the above-mentioned rail pressure sensor electromagnetic interference detection method when running.

[0033] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0034] The detection method provided in the embodiment of the present application collects the output signal of the rail pressure sensor in real time; processes the output signal based on the knock chip to obtain an integral voltage; determines whether the integral voltage is greater than or equal to a preset interference tolerance limit; when the integral voltage is greater than or equal to the interference tolerance limit, the electronic control unit issues a warning message. By converting electromagnetic interference energy into a voltage signal output form that can be monitored in real time, the working state of the rail pressure sensor can be more intuitively displayed. By monitoring the size of the interference energy, the rail pressure sensor can be repaired in time after being affected, ensuring that the hardware circuit of the rail pressure sensor will not be damaged, and avoiding the problem of sudden abnormal valve flushing during driving caused by the output of an erroneous rail pressure signal due to a hardware circuit failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 is a flow chart of an optional rail pressure sensor electromagnetic interference detection method according to an embodiment of the present application;

[0037] Figure 2is a flow chart of another rail pressure sensor electromagnetic interference detection method according to an embodiment of the present application;

[0038] Figure 3 is a schematic diagram of an electromagnetic interference detection device for a rail pressure sensor according to an embodiment of the present application;

[0039] Figure 4 It is a schematic diagram of the structure of an optional electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] The following is combined with Figure 1-2 The electromagnetic interference detection method of the rail pressure sensor of the embodiment of the present application is described in detail. It should be noted that the following application scenarios are only shown to facilitate understanding of the spirit and principle of the present application, and the implementation of the present application is not limited in this respect. On the contrary, the implementation of the present application can be applied to any applicable scenario.

[0043] The present application proposes a method for detecting the degree of electromagnetic interference of a rail pressure sensor, which can diagnose the degree of interference of the rail pressure sensor in real time and report faults in time, thereby protecting the hardware circuit of the rail pressure sensor from damage due to electromagnetic interference and extending its service life.

[0044] like Figure 1 As shown, the method mainly includes the following steps:

[0045] S101 collects the output signal of the rail pressure sensor in real time.

[0046] In an embodiment of the present application, first, ensure that the rail pressure sensor is correctly installed on the common rail system of the engine to accurately measure the fuel pressure. Set up an electronic control unit (ECU) to identify and process signals from the rail pressure sensor.

[0047] Collect the output signal of the rail pressure sensor in real time, start the engine, and make the rail pressure sensor start to work and output signals.

[0048] S102 processes the output signal based on the knock chip to obtain the integrated voltage.

[0049] In one embodiment, the output signal of the rail pressure sensor is input into the knock chip, and the output signal is processed based on the knock chip to obtain the integrated voltage.

[0050] Specifically, input the output signal into the knock chip to obtain the initial integrated voltage output; input the initial integrated voltage into the analog-to-digital converter acquisition circuit of the electronic control unit to obtain the acquired integrated voltage.

[0051] First, the signal is input into the knock chip to ensure that the output signal of the rail pressure sensor can be correctly transmitted to the input end of the knock chip. The knock chip receives the output signal of the rail pressure sensor and processes these signals according to its internal algorithm to identify and quantify the degree of electromagnetic interference. The integration circuit inside the knock chip integrates the interference signal, converts the energy of the interference signal into a voltage form, that is, the initial integrated voltage. This initial integrated voltage represents the magnitude of the electromagnetic interference energy received by the rail pressure sensor.

[0052] Transmit the initial integrated voltage output by the knock chip to the ADC input end of the electronic control unit through appropriate electrical connections. Ensure the integrity and accuracy of the signal transmission process and avoid additional electromagnetic interference affecting the signal transmission. The analog-to-digital converter (ADC) of the electronic control unit collects the initial integrated voltage output by the knock chip in real time and converts the analog voltage signal into a digital signal.

[0053] S103 determines whether the integrated voltage is greater than or equal to a preset interference tolerance limit value.

[0054] In one embodiment, before determining whether the integrated voltage is greater than or equal to a preset interference tolerance limit value, it further includes: obtaining the electromagnetic interference energy limit value of the rail pressure sensor; processing the electromagnetic interference energy limit value based on the knock chip to obtain the output integrated voltage limit value, and using the integrated voltage limit value as the interference tolerance limit value.

[0055] First, it is necessary to determine the maximum electromagnetic interference energy limit that the rail pressure sensor can withstand. This limit is determined based on the sensor's design parameters and safe operation requirements. This limit can be obtained from the sensor's technical specifications, data provided by the manufacturer, or through experiments and tests.

[0056] Furthermore, the electromagnetic interference energy limit of the rail pressure sensor is input to the knock chip. The integral circuit of the knock chip calculates a corresponding integral voltage limit according to the processed electromagnetic interference energy limit. This integral voltage limit is the representation of the electromagnetic interference energy limit in voltage form, which will be used as a reference for subsequent comparisons. The integral voltage limit output by the knock chip is set as the interference tolerance limit of the electronic control unit (ECU), that is, the monitoring threshold.

[0057] Furthermore, the electronic control unit continuously monitors the output signal of the rail pressure sensor and inputs it into the knock chip to obtain a real-time integrated voltage. The real-time collected integrated voltage is compared with the interference tolerance limit value (integral voltage limit value).

[0058] S104 When the integrated voltage is greater than or equal to the interference tolerance limit, the electronic control unit issues a warning message.

[0059] In one implementation, when the real-time integrated voltage is greater than or equal to the interference tolerance limit value, it indicates that the rail pressure sensor may be subject to excessive electromagnetic interference, triggering a warning condition.

[0060] The ECU generates a warning signal, which may include a visual, audible or digital signal. For example, a warning message such as a warning light or message is displayed on the vehicle's instrument panel or console. An audible alarm is sounded through the vehicle's audio system to attract the driver's attention.

[0061] Furthermore, after the electronic control unit issues the warning information, the ECU also records the relevant fault code and warning event for subsequent diagnosis and analysis. In one embodiment, one or more warning information including the warning time, rail pressure sensor state, integrated voltage value, and rail pressure sensor identification is stored in the historical fault record. Electromagnetic compatibility rectification is performed on the engine working environment based on the historical fault record.

[0062] In one embodiment, the method further includes directly inputting the output signal of the rail pressure sensor collected in real time into an analog-to-digital converter collection circuit of the electronic control unit to obtain a collected rail pressure signal.

[0063] The output signal of the rail pressure sensor of the embodiment of the present application is processed in two ways: one is input to the knock chip to detect the degree of electromagnetic interference, and the other is directly input to the analog-to-digital converter acquisition circuit of the electronic control unit, and the analog output signal of the rail pressure sensor is collected in real time through its analog-to-digital converter (ADC). The operation of the fuel pump or injector is adjusted according to the rail pressure data to maintain the required rail pressure.

[0064] Therefore, in the method of the embodiment of the present application, after the electronic control unit issues the warning information, the engine is controlled to run normally to ensure the continuous driving of the vehicle.

[0065] Furthermore, the warning information and related data are recorded in the ECU's historical fault record for subsequent analysis and maintenance. The ECU continues to monitor the rail pressure sensor's status and electromagnetic interference level to ensure that any further changes can be captured and processed in a timely manner.

[0066] In one implementation scenario, the ECU can send early warning information to maintenance personnel through the vehicle communication system to prompt inspection and maintenance if necessary. Provide user guidance information to inform the driver or operator of the actions to take, such as slowing down, stopping for inspection, or contacting professional maintenance services.

[0067] Through this dual-path signal processing and real-time monitoring method, the embodiment of the present application can effectively detect and respond to electromagnetic interference while ensuring the normal operation of the engine, thereby improving the reliability and safety of the engine.

[0068] In order to facilitate understanding of the method of the embodiment of the present application, Figure 2 Further description.

[0069] like Figure 2 As shown in the figure, first, the monitoring threshold of the electronic control unit (ECU) is set according to the interference energy limit that the rail pressure sensor can tolerate. The output signal of the rail pressure sensor is collected in real time and output to the knock chip. The knock chip processes the integral voltage representing the electromagnetic interference energy and gives it to the analog-to-digital converter (ADC) acquisition circuit of the ECU.

[0070] Furthermore, it is determined whether the collected integral voltage value is greater than the set monitoring threshold. If not, the engine is running normally, there is no hidden danger of valve flushing, and the rail pressure sensor has no hardware risk.

[0071] If yes, the ECU will warn and record the fault in the history. The fault will not affect the normal operation of the engine. Perform EMC (electromagnetic compatibility) rectification on the engine working environment.

[0072] This application is based on the characteristics of high-frequency interference signals. The voltage value representing the interference energy is processed by the integral circuit of the knock chip. The ECU collects the voltage value and compares it with the preset threshold to complete real-time and effective detection of the degree of electromagnetic interference.

[0073] By monitoring the interference energy, the method can promptly repair the rail pressure sensor after it is affected, thereby ensuring that the hardware circuit of the rail pressure sensor will not be damaged, and avoiding the problem of sudden abnormal valve flushing during driving caused by the output of erroneous rail pressure signals due to hardware circuit failure.

[0074] According to another aspect of the embodiments of the present application, a rail pressure sensor electromagnetic interference detection device for implementing the rail pressure sensor electromagnetic interference detection method is also provided. Figure 3 As shown, the device comprises:

[0075] The acquisition module 301 is used to acquire the output signal of the rail pressure sensor in real time;

[0076] An integration module 302, used to process the output signal based on the knock chip to obtain an integrated voltage;

[0077] A judging module 303 is used to judge whether the integrated voltage is greater than or equal to a preset interference tolerance limit;

[0078] The early warning module 304 is used for the electronic control unit to issue an early warning message when the integrated voltage is greater than or equal to the interference tolerance limit value.

[0079] In one embodiment, it further includes:

[0080] The integration module is specifically used to input the output signal into the knock chip to obtain the output initial integration voltage;

[0081] The initial integrated voltage is input to the analog-to-digital converter acquisition circuit of the electronic control unit to obtain the acquired integrated voltage.

[0082] It should be noted that the electromagnetic interference detection device for rail pressure sensor provided in the above embodiment only uses the division of the above functional modules as an example when executing the electromagnetic interference detection method for rail pressure sensor. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the electromagnetic interference detection device for rail pressure sensor provided in the above embodiment and the electromagnetic interference detection method for rail pressure sensor are of the same concept. The implementation process is detailed in the method embodiment and will not be repeated here.

[0083] According to another aspect of the embodiments of the present application, an electronic device corresponding to the rail pressure sensor electromagnetic interference detection method provided in the above embodiments is also provided to execute the above rail pressure sensor electromagnetic interference detection method.

[0084] Please refer to Figure 4 , which shows a schematic diagram of an electronic device provided by some embodiments of the present application. Figure 4 As shown, the electronic device includes: a processor 400, a memory 401, a bus 402 and a communication interface 403, and the processor 400, the communication interface 403 and the memory 401 are connected through the bus 402; the memory 401 stores a computer program that can be run on the processor 400, and when the processor 400 runs the computer program, the rail pressure sensor electromagnetic interference detection method provided in any of the aforementioned embodiments of the present application is executed.

[0085] The memory 401 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 403 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0086] The bus 402 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. Among them, the memory 401 is used to store programs, and the processor 400 executes the program after receiving the execution instruction. The rail pressure sensor electromagnetic interference detection method disclosed in any implementation of the embodiment of the present application may be applied to the processor 400, or implemented by the processor 400.

[0087] The processor 400 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 400. The above processor 400 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a readily available programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 401, and the processor 400 reads the information in the memory 401 and completes the steps of the above method in combination with its hardware.

[0088] The electronic device provided in the embodiment of the present application and the rail pressure sensor electromagnetic interference detection method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, operated or implemented therein.

[0089] According to another aspect of the embodiments of the present application, a computer-readable storage medium corresponding to the rail pressure sensor electromagnetic interference detection method provided in the aforementioned embodiments is also provided, on which a computer program (i.e., a program product) is stored. When the computer program is executed by a processor, the rail pressure sensor electromagnetic interference detection method provided in any of the aforementioned embodiments is executed.

[0090] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0091] The computer-readable storage medium provided in the above-mentioned embodiment of the present application and the rail pressure sensor electromagnetic interference detection method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, run or implemented by the application program stored therein.

[0092] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A rail pressure sensor electromagnetic interference detection method, characterized in that: include: Collect the output signal of rail pressure sensor in real time; Processing the output signal based on the knock chip to obtain an integrated voltage; Determining whether the integrated voltage is greater than or equal to a preset interference tolerance limit; When the integrated voltage is greater than or equal to the interference tolerance limit value, the electronic control unit issues a warning message.

2. The method according to claim 1, characterized in that The step of processing the output signal based on the knock chip to obtain an integrated voltage includes: Inputting the output signal into the detonation chip to obtain an output initial integrated voltage; The initial integrated voltage is input into an analog-to-digital converter acquisition circuit of an electronic control unit to obtain the acquired integrated voltage.

3. The method according to claim 1, characterized in that Before determining whether the integrated voltage is greater than or equal to a preset interference tolerance limit, the method further includes: Obtaining an electromagnetic interference energy limit value of the rail pressure sensor; The electromagnetic interference energy limit is processed based on the knock chip to obtain an output integral voltage limit, and the integral voltage limit is used as the interference tolerance limit.

4. The method according to claim 1, characterized in that: After the electronic control unit issues the warning information, the method further includes: One or more warning information including warning time, rail pressure sensor state, integrated voltage value, and rail pressure sensor identification is stored in the historical fault record; Based on the historical fault records, electromagnetic compatibility rectification is performed on the engine working environment.

5. The method according to claim 1, characterized in that Also includes: The output signal of the rail pressure sensor collected in real time is directly input into the analog-to-digital converter collection circuit of the electronic control unit to obtain the collected rail pressure signal.

6. The method according to claim 5, characterized in that After the electronic control unit issues the warning information, the method further includes: Controls the normal operation of the engine.

7. A rail pressure sensor electromagnetic interference detection device, characterized in that: include: An acquisition module is used to acquire the output signal of the rail pressure sensor in real time; An integration module, used for processing the output signal based on the knock chip to obtain an integrated voltage; A judging module, used for judging whether the integrated voltage is greater than or equal to a preset interference tolerance limit; The early warning module is used for the electronic control unit to issue an early warning message when the integrated voltage is greater than or equal to the interference tolerance limit value.

8. The device according to claim 7, characterized in that Also includes: The integration module is specifically used to input the output signal into the knock chip to obtain an output initial integration voltage; The initial integrated voltage is input into an analog-to-digital converter acquisition circuit of an electronic control unit to obtain the acquired integrated voltage.

9. An electronic device, characterized in that: The invention comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the rail pressure sensor electromagnetic interference detection method according to any one of claims 1 to 6 when executing the program instructions.

10. A computer-readable medium, characterized in that Computer-readable instructions are stored thereon, and the computer-readable instructions are executed by a processor to implement a rail pressure sensor electromagnetic interference detection method according to any one of claims 1 to 6.

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