CN116909496A - Vehicle fault data tracing method based on embedded high-speed data communication technology - Google Patents
Vehicle fault data tracing method based on embedded high-speed data communication technology Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004891 communication Methods 0.000 title claims abstract description 25
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000003745 diagnosis Methods 0.000 claims description 11
- 238000013500 data storage Methods 0.000 claims description 7
- 238000004092 self-diagnosis Methods 0.000 claims description 6
- 230000006870 function Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 239000010705 motor oil Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/76—Architectures of general purpose stored program computers
- G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
- G06F15/7807—System on chip, i.e. computer system on a single chip; System in package, i.e. computer system on one or more chips in a single package
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0608—Saving storage space on storage systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/064—Management of blocks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/0644—Management of space entities, e.g. partitions, extents, pools
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/0652—Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
Abstract
The invention belongs to the technical field of electric digital data processing, and particularly relates to a vehicle fault data tracing method based on an embedded high-speed data communication technology, which comprises the following steps of: the method comprises the steps that a high-speed large-capacity embedded memory chip is integrated into a vehicle electric control system to serve as an additional memory chip, and data transmission is carried out between the embedded memory chip and the additional memory chip through an eMMC protocol; the method comprises the steps that multidimensional data related to vehicle faults generated in the running process are transmitted to an embedded memory chip, and when the memory space of the embedded memory chip is about to be full, the latest data are covered with the data stored in the memory space first; when tracing, the upper computer platform is connected with the vehicle electric control system through the USB interface, and the data of the embedded memory chip is read and erased through the upper computer platform, so that tracing of fault data is realized. The invention solves the problems of small storage capacity and low transmission rate of stored data of the vehicle electric control system, and provides a technical basis for analyzing the failure cause of the vehicle and improving the reliability of the product.
Description
Technical Field
The invention belongs to the technical field of electric digital data processing, and particularly relates to a vehicle fault data tracing method based on an embedded high-speed data communication technology.
Background
At present, in order to meet the requirements of energy conservation and emission reduction, almost all vehicles are provided with an electric control system, and the electric control system can monitor most of parameters of vehicle operation. The electronic control system has a fault diagnosis function, fault codes are stored in the embedded electronic control system when faults occur, and the data can be read out only through a special diagnosis proposal and is used for fault analysis. However, when the vehicle is in fault maintenance, accurate positioning of the fault is difficult to achieve through the fault code, fault positioning analysis must be performed by means of more fault-related operation data, and how to obtain more fault-related data becomes a key of current vehicle fault tracing.
The chip memory space used by the automobile electric control system is generally smaller, the capacity of the on-chip memory is generally smaller than 200k, and although the built-in Flash of the chip has a memory space of more than 2000k, the on-chip memory is limited by the read-write speed, the data read-write operation is generally carried out only once when the system is powered down, and the real-time read-write can not be carried out on a large amount of high-speed data, so that a large amount of real-time data cannot be stored.
Therefore, a vehicle fault tracing method capable of solving the problems of small storage capacity and low storage data transmission rate of a vehicle electric control system is needed.
In the prior art, CN115456208A discloses a vehicle fault responsibility tracing method, a device, a storage medium and electronic equipment, and the aim of safe, strict and efficient operation is achieved by perfecting the management behavior of vehicle archive information supervision of finished vehicles, so that the operation safety of trucks is ensured, the fault responsibility tracing system in the process of finished vehicles operation is realized, and the informationized management efficiency is improved. The patent is mainly aimed at railways and trains, and the adopted traceability mode is mainly used for acquiring the current vehicle image of the target finished vehicle, so that the vehicle is not suitable for being used in an automobile electric control system.
Disclosure of Invention
According to the defects in the prior art, the invention provides the vehicle fault data tracing method based on the embedded high-speed data communication technology, which solves the problems of small storage capacity and low storage data transmission rate of the vehicle electric control system.
In order to achieve the above purpose, the invention provides a vehicle fault data tracing method based on an embedded high-speed data communication technology, which comprises the following steps:
s1, a high-speed large-capacity embedded memory chip is integrated into a vehicle electric control system to serve as an additional memory chip, and a microprocessor of the vehicle electric control system and the embedded memory chip transmit data through an eMMC protocol;
s2, after the vehicle is electrified, the vehicle electric control system enters an initialization stage, and in the initialization process, a microprocessor of the vehicle electric control system carries out handshake communication with an embedded memory chip, and the embedded memory chip reports the current residual space;
s3, after initialization is completed, the vehicle electric control system transmits multidimensional data related to vehicle faults generated in the running process to the embedded memory chip through an eMMC protocol, the embedded memory chip comprises a plurality of different memory spaces, the multidimensional data related to the vehicle faults comprises a plurality of different types of data, and the multidimensional data are respectively stored in the different memory spaces of the embedded memory chip;
s4, when the storage space of the embedded storage chip is about to be full, the latest data are covered with the data stored in the storage space first, and the like, so that the data within a certain time are always kept in the storage space;
and S5, when the source tracing is required, carrying out data transmission on the upper computer platform and the vehicle electric control system through the USB interface, converting the file format of the data into a file in an readable format, and reading and erasing the data of the embedded memory chip through the upper computer platform, so that the source tracing of fault data is realized.
In the step S3, when the eMMC protocol is used for data communication transmission, the data width is 8 bits of transmission standard.
In the step S3, the data types are three types, and the embedded memory chip includes three different memory spaces corresponding to each other, namely a memory space a, a memory space B and a memory space C, wherein the first type of data is stored in the memory space a, the second type of data is stored in the memory space B, and the third type of data is stored in the memory space C.
In the step S3, the first data is real-time data of the operation of the vehicle electric control system, the second data is historical accumulated data, the third data is self-diagnosis result data of the vehicle electric control system, and the three storage spaces have the following size relations: memory space a > memory space B > memory space C.
In the step S3, the real-time data of the operation of the vehicle electric control system comprises the input parameters, the intermediate calculation parameters and the key output parameters of the operation of the vehicle electric control system, the storage frequency during storage is not less than 100Hz, and the data volume generated per second is not less than 10k;
the memory space a is divided into a plurality of data blocks of 512K in size, each data block is divided into 512 memory cells, and each memory cell is 1K in size.
Since the first type of data has a large data size, the storage space a is divided into a plurality of equal-sized data blocks, each of which is 512k, when data is stored.
In the step S3, the historical accumulated data is historical operation data of key parameters of a vehicle electric control system, wherein the historical operation data comprises vehicle speed, rotating speed, accelerator opening, cooling liquid temperature and engine oil pressure temperature, the storage frequency during storage is 1Hz-10Hz, and the data amount generated per second is not more than 1k;
the memory space B is divided into a plurality of data blocks of size 32K, each data block is divided into 32 memory cells, and each memory cell is of size 1K.
Since the amount of data of the second type is small, the storage space B is divided for each of the area spaces 32k at the time of data storage.
In the step S3, when the self-diagnosis result data of the vehicle electric control system is stored, the data is stored in a fault code mode according to the fault diagnosis function of the vehicle electric control system, the storage frequency is consistent with the diagnosis frequency of the vehicle electric control system, and each time a new diagnosis result appears, the data is stored once, and the data quantity stored each time is smaller than 0.5k;
the memory space C is divided into a plurality of data blocks of size 1k, each of which is divided into 4 memory cells, each of which is 250 bytes in size.
The third type of data has the smallest data amount, and the storage space C is divided into a plurality of data blocks of equal size for each of the area spaces 1k.
In the step S4, each data block in the storage space a, the storage space B and the storage space C has a number, when the data block with the number 1 is full, the data block with the number 2 is automatically jumped into for data storage, and so on, so as to realize the data storage from the 1 to the last data block, and when the data block with the number being the last, the latest data firstly replaces the content of the data block with the number 1.
In the step S5, the upper computer platform and the vehicle electric control system perform data transmission through high-speed USB communication, when the vehicle electric control system and the upper computer platform are connected, data in the embedded memory chip is presented in the form of a file, at this time, the file format is presented in the form of txt format, the file name indicates the storage time of the file, the txt file is converted into an excel or csv format file through transcoding to present the storage content of the embedded memory chip, and the upper computer software can select the data and operate according to the requirement, so as to realize the tracing of fault data.
The invention has the beneficial effects that:
the invention is mainly used for solving the problem of tracing the vehicle fault data, realizes the real-time storage of three types of data by organically integrating the embedded memory chip with the vehicle electric control system, establishes connection with the upper computer based on high-speed USB communication, thereby realizing data reading and erasing, achieving the purpose of tracing the fault data, solving the problems of small memory capacity and low transmission rate of the stored data of the vehicle electric control system, and providing a technical basis for analyzing the vehicle fault cause and improving the reliability of products.
Drawings
FIG. 1 is a schematic diagram of the principles of the present invention;
FIG. 2 is a schematic diagram of a memory space of an embedded memory chip according to the present invention.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
in this embodiment, a heavy vehicle meeting the national six-emission is selected, and the vehicle has a perfect electric control system.
The vehicle fault data tracing method based on the embedded high-speed data communication technology comprises the following steps:
s1, a high-speed large-capacity embedded memory chip is integrated into a vehicle electric control system to serve as an additional memory chip, and a microprocessor of the vehicle electric control system and the embedded memory chip transmit data through an eMMC protocol;
s2, after the vehicle is electrified, the vehicle electric control system enters an initialization stage, and in the initialization process, a microprocessor of the vehicle electric control system and the embedded memory chip carry out handshake communication through an SPI, and the embedded memory chip reports the current residual space;
s3, after initialization is completed, the vehicle electric control system transmits multidimensional data related to vehicle faults generated in the operation process to an embedded memory chip through an eMMC protocol, the data width selects an 8-bit transmission standard, the embedded memory chip comprises 3 different memory spaces which are a memory space A, a memory space B and a memory space C respectively, the multidimensional data related to the vehicle faults comprise 3 different types of data, the first type of data is stored in the memory space A, the second type of data is stored in the memory space B, and the third type of data is stored in the memory space C;
s4, when the storage space of the embedded storage chip is about to be full, the latest data are covered with the data stored in the storage space first, and the like, so that the data within a certain time are always kept in the storage space;
and S5, when the source tracing is required, carrying out data transmission on the upper computer platform and the vehicle electric control system through the USB interface, converting the file format of the data into a file in an readable format, and reading and erasing the data of the embedded memory chip through the upper computer platform, so that the source tracing of fault data is realized.
In S3, the first data is real-time data of the operation of the vehicle electric control system, the second data is historical accumulated data, the third data is self-diagnosis result data of the vehicle electric control system, and the size relations of the three storage spaces are as follows: memory space a > memory space B > memory space C. The first data contained the contents shown in table 1.
Table 1 satisfies real-time data of vehicle electronic control system operation of heavy vehicles discharged by China six
S3, real-time data of the operation of the vehicle electric control system comprises input parameters, intermediate calculation parameters and key output parameters of the operation of the vehicle electric control system, wherein the storage frequency during storage is not less than 100Hz, and the data volume generated per second is not less than 10k;
the memory space a has a size of 1000M and contains 2000 data blocks of size 512k, each data block having a composition of 512 data units of size 1k.
Each data unit is divided into 1k, each time the storage of 1k data is realized, each time the number of the storage unit is automatically increased by 1, and when the number of the unit is equal to 512, the number of the data block is automatically increased by 1, so that the continuous storage of the data is realized.
S3, historical accumulated data are historical operation data of key parameters of a vehicle electric control system, wherein the historical operation data comprise vehicle speed, rotating speed, accelerator opening, cooling liquid temperature and engine oil pressure temperature, storage frequency is 1Hz-10Hz during storage, and data amount generated per second is not more than 1k;
the memory space B has a size of 32M and comprises 1000 data blocks of size 32k, each data block having a composition of 32 data units of size 1k.
Each data unit is divided into 1k, each time 1k data is stored, each time the number of the storage unit is automatically added by 1, and when the number of the unit is equal to 32, the number of the data block is automatically accumulated.
S3, when the self-diagnosis result data of the vehicle electric control system is stored, the data is stored in a fault code mode by depending on the fault diagnosis function of the vehicle electric control system, the storage frequency is consistent with the diagnosis frequency of the vehicle electric control system, and each time a new diagnosis result appears, the data is stored once, and the data amount stored each time is smaller than 0.5k;
the memory space C has a size of 100k and comprises 100 data blocks of size 1k, each data block consisting of 4 data units of size 250 bytes.
Each data unit is divided into 250 bytes, each time the storage of 250 bytes of data is realized, each time the number of the storage unit is automatically added by 1, and when the number of the unit is equal to 4, the number of the data block is automatically accumulated.
In S4, each data block of the storage space A, the storage space B and the storage space C is provided with a number, when the data block with the number of 1 is full, the data block with the number of 2 is automatically jumped into for data storage, and the like, so that the data storage from 1 to the last data block is realized, and when the data block with the number of the last data block is the last data, the latest data firstly replaces the content of the data block with the number of 1.
Fig. 2 is a schematic diagram of a memory space of an embedded memory chip, wherein X, Y, Z is the last data block numbers of the memory space a, the memory space B and the memory space C, respectively, and corresponds to the embodiment, i.e. x=2000, y=1000, and z=100.
In S5, after the system runs for a period of time, the upper computer platform and the vehicle electric control system conduct data transmission through high-speed USB communication, when the vehicle electric control system is connected with the upper computer platform, data in the embedded storage chip are presented in the form of files, file formats are presented in the txt format at the moment, file names represent storage time of the files (namely, the storage time of the data is obtained according to the naming of the data files), the txt files are converted into excel or csv format files through transcoding, data and curves are formed to present storage content of the embedded storage chip, and upper computer software can select the data and operate according to requirements to achieve tracing of fault data.
Claims (9)
1. The vehicle fault data tracing method based on the embedded high-speed data communication technology is characterized by comprising the following steps of:
s1, a high-speed large-capacity embedded memory chip is integrated into a vehicle electric control system to serve as an additional memory chip, and a microprocessor of the vehicle electric control system and the embedded memory chip transmit data through an eMMC protocol;
s2, after the vehicle is electrified, the vehicle electric control system enters an initialization stage, and in the initialization process, a microprocessor of the vehicle electric control system carries out handshake communication with an embedded memory chip, and the embedded memory chip reports the current residual space;
s3, after initialization is completed, the vehicle electric control system transmits multidimensional data related to vehicle faults generated in the running process to the embedded memory chip through an eMMC protocol, the embedded memory chip comprises a plurality of different memory spaces, the multidimensional data related to the vehicle faults comprises a plurality of different types of data, and the multidimensional data are respectively stored in the different memory spaces of the embedded memory chip;
s4, when the storage space of the embedded storage chip is about to be full, the latest data are covered with the data stored in the storage space first, and the like, so that the data within a certain time are always kept in the storage space;
and S5, when the source tracing is required, carrying out data transmission on the upper computer platform and the vehicle electric control system through the USB interface, converting the file format of the data into a file in an readable format, and reading and erasing the data of the embedded memory chip through the upper computer platform, so that the source tracing of fault data is realized.
2. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to claim 1, wherein the vehicle fault data tracing method is characterized in that: in the step S3, when the eMMC protocol is used for data communication transmission, the data width is 8 bits of transmission standard.
3. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to claim 1, wherein the vehicle fault data tracing method is characterized in that: in the step S3, the data types are three types, and the embedded memory chip includes three different memory spaces corresponding to each other, namely a memory space a, a memory space B and a memory space C, wherein the first type of data is stored in the memory space a, the second type of data is stored in the memory space B, and the third type of data is stored in the memory space C.
4. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to claim 3, wherein the vehicle fault data tracing method is characterized in that: in the step S3, the first data is real-time data of the operation of the vehicle electric control system, the second data is historical accumulated data, the third data is self-diagnosis result data of the vehicle electric control system, and the three storage spaces have the following size relations: memory space a > memory space B > memory space C.
5. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to claim 4, wherein the vehicle fault data tracing method is characterized in that: in the step S3, the real-time data of the operation of the vehicle electric control system comprises the input parameters, the intermediate calculation parameters and the key output parameters of the operation of the vehicle electric control system, the storage frequency during storage is not less than 100Hz, and the data volume generated per second is not less than 10k;
the memory space a is divided into a plurality of data blocks of 512K in size, each data block is divided into 512 memory cells, and each memory cell is 1K in size.
6. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to claim 4, wherein the vehicle fault data tracing method is characterized in that: in the step S3, the historical accumulated data is historical operation data of key parameters of a vehicle electric control system, wherein the historical operation data comprises vehicle speed, rotating speed, accelerator opening, cooling liquid temperature and engine oil pressure temperature, the storage frequency during storage is 1Hz-10Hz, and the data amount generated per second is not more than 1k;
the memory space B is divided into a plurality of data blocks of size 32K, each data block is divided into 32 memory cells, and each memory cell is of size 1K.
7. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to claim 4, wherein the vehicle fault data tracing method is characterized in that: in the step S3, when the self-diagnosis result data of the vehicle electric control system is stored, the data is stored in a fault code mode according to the fault diagnosis function of the vehicle electric control system, the storage frequency is consistent with the diagnosis frequency of the vehicle electric control system, and each time a new diagnosis result appears, the data is stored once, and the data quantity stored each time is smaller than 0.5k;
the memory space C is divided into a plurality of data blocks of size 1k, each of which is divided into 4 memory cells, each of which is 250 bytes in size.
8. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to any one of claims 4 to 7, wherein the method is characterized in that: in the step S4, each data block in the storage space a, the storage space B and the storage space C has a number, when the data block with the number 1 is full, the data block with the number 2 is automatically jumped into for data storage, and so on, so as to realize the data storage from the 1 to the last data block, and when the data block with the number being the last, the latest data firstly replaces the content of the data block with the number 1.
9. The vehicle fault data tracing method based on the embedded high-speed data communication technology according to claim 1, wherein the vehicle fault data tracing method is characterized in that: in the step S5, the upper computer platform and the vehicle electric control system perform data transmission through high-speed USB communication, when the vehicle electric control system and the upper computer platform are connected, data in the embedded memory chip is presented in the form of a file, at this time, the file format is presented in the form of txt format, the file name indicates the storage time of the file, the txt file is converted into an excel or csv format file through transcoding to present the storage content of the embedded memory chip, and the upper computer software can select the data and operate according to the requirement, so as to realize the tracing of fault data.
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