CN114024989A - Vehicle information acquisition and fault detection device based on RFID - Google Patents
Vehicle information acquisition and fault detection device based on RFID Download PDFInfo
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
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Abstract
The invention provides a vehicle information acquisition and fault judgment device based on RFID, which can acquire vehicle information more comprehensively by directly connecting a vehicle bus or a sensor signal wire; time is given to an internal system through a Beidou time service module, so that all recorded data are attached with time stamps; the real-time performance of man-machine interaction is improved through the capacitive display screen; through the RFID module, the data transmission mode is convenient and fast and simplified; the data storage is carried out in a mode of a storage module and an external storage card, the data storage is carried out by taking seconds as a unit, the vehicle information of one year can be stored at most, and a reliable and solid data basis is provided for a maintenance unit or a management unit to analyze the vehicle condition. The invention can realize the situation of the returned data by matching with a vehicle management background system or a vehicle maintenance background system, visually display information such as vehicle condition information change trend, vehicle fault occurrence reason, vehicle fault occurrence frequency and the like for a manager, and improve the management efficiency.
Description
Technical Field
The invention relates to a vehicle information acquisition and fault detection device based on RFID radio frequency transmission.
Background
Along with the rapid development of the automobile manufacturing industry, the intellectualization and the informatization of the automobile are remarkably improved. When the automobile is produced and designed, corresponding sensors are installed at all parts. The sensor transmits part of data to the instrument panel display through a bus or a non-bus form. Moreover, the automobile is often provided with an OBD (On-Board Diagnostic vehicle) interface, so that the collection and the judgment of fault information are facilitated.
However, with the increasing popularity of automobiles, the need for the driver group to know the automobile condition information is also increasing, and the need of the user cannot be met by only relying on data provided by the dashboard. Moreover, more and more drivers only have the vehicle driving capability but lack the capability of judging the vehicle condition, so that correct countermeasures cannot be taken when the vehicle breaks down, and the occurrence probability of vehicle accidents is increased invisibly. The data for judging the vehicle fault by the vehicle diagnosis system of the automobile is isolated and can be understood only by professional maintenance personnel, so that the real-time grasping of the vehicle fault by a driver is restricted.
Moreover, for some advanced vehicles and construction machinery, the management and control of the motorhour (engine running time) is relatively strict, and when the motorhour exceeds a threshold value, the whole engine needs to be overhauled. Therefore, for this kind of advanced vehicles and construction machinery, real-time acquisition and return of the motor hour consumption is urgently needed to be solved.
At present, in the prior art, the following technical problems of the vehicle information acquisition or vehicle fault automatic monitoring device are not solved yet:
1) only instantaneous vehicle conditions can be monitored, vehicle information cannot be accumulated continuously, the fault cause of an accident vehicle cannot be judged accurately, and the acquisition mode depends on an OBD interface reserved by the vehicle. The OBD interface is limited in vehicle information provided externally, so that the vehicle information can not be comprehensively collected, vehicle faults can not be accurately judged and positioned, and the OBD interface can not be applied to advanced vehicles and engineering machinery without reserved OBD interfaces.
2) For the data return mode, the transmission mode of the vehicle information acquisition and fault detection equipment in the market at present depends on wired transmission, and the acquired information or diagnosis fault is transmitted to a maintenance unit or a management unit in a network cable or data cable mode.
3) For the storage capacity, the vehicle information acquisition and fault detection equipment on the market generally has a small temporary storage space, cannot accumulate and store information, and cannot accurately analyze the change trend of the vehicle information.
Disclosure of Invention
Technical problem to be solved by the present examination
The invention aims to provide a vehicle information acquisition and fault judgment device based on RFID (radio frequency identification devices), which mainly solves the technical problems that: the existing vehicle information acquisition and fault judgment equipment can only monitor the instantaneous vehicle condition, depends on an OBD interface and acquires incomplete data; the data transmission mode depends on wired transmission and is not convenient; the storage capacity is small, and the vehicle information change trend cannot be accurately analyzed.
The invention relates to a vehicle information acquisition and fault judgment device based on RFID, which consists of three plates, wherein the three plates are respectively as follows: the device comprises a main control board, a display screen and a power supply management module.
The main control board is connected with a bus of the vehicle and used for acquiring analog signals in real time. The invention reserves various bus interfaces to be suitable for different vehicles, which comprises the following steps: the CAN bus, the serial port and the network port are used for intercepting the type signals of a transmission cable from the sensor to the instrument panel for non-bus type vehicles.
The main control board and the data receiving unit transmit data to a maintenance center or a management unit in a wired or wireless mode. The data transmission of the invention supports wired transmission and wireless transmission, wherein the wired transmission refers to transmitting data to a maintenance center or a management unit through a data line, a network cable or a mobile U disk; the wireless transmission means that the radio frequency card is used as a data medium, data is transferred to the radio frequency card in a card swiping mode, and then the data is transmitted to a maintenance center or a management unit in the card swiping mode, wherein the RFID module should meet ISO/IEC 14443 TYPEA/TYPEB, and the communication frequency is 13.56 MHz.
The display screen displays all the fact information and the prediction information through the capacitive screen, and can configure the screen display content through the screen configuration interface, only display the content to be displayed, or scroll-display all the acquired and detected content.
The power management module comprises a power module and a storage battery, the low-power-consumption design is adopted, in the running process of the vehicle, the MCU of the active board detects that the vehicle is in a running or running state, the equipment gets power from the vehicle, and the storage battery in the equipment is in a charging state. After the vehicle is flamed out, the MCU detects a vehicle flameout signal, enters a low-power-consumption running mode, extinguishes the screen, and the equipment gets power from the internal storage battery, and the storage battery is in a discharging state at the moment.
Further, the main control board mainly comprises an information acquisition module, an ADC module, a storage module, a Beidou time service module, an RFID identification module, a data transmission module and an MCU. The information acquisition module is connected with a bus of the vehicle and used for acquiring the analog signal in real time. The ADC module converts the acquired analog signals such as voltage and frequency signals into digital signals through the ADC module (analog-to-digital conversion module) and sends the digital signals to the MCU. The MCU records the acquired vehicle information in real time and stores the vehicle information in the internal storage module in a circulating manner. The MCU carries out integration analysis on the values of all sensors of the vehicle through an internal algorithm, detects vehicle faults in advance, and stores detection results in the storage module. The big dipper time service module carries out the timestamp record with the memory information, and the time of making clear of data storage when big dipper satellite signal is less strong, carries out rough timing through the inside RTC (Real-time clock) of MCU, replies the back at big dipper satellite signal, calibrates the time.
Furthermore, a background sub-thread is created inside the invention, the sub-thread inserts a new information volume record after real-time acquisition and processing into the database every 1 second, the size of each record is less than 300 bytes, the storage volume per hour is about 1 Mbyte, and the maximum storage volume per month is 720M. The capacity of a local memory card of the system is 13G, the occupied memory cost of other systems is deducted, the reserved memory space is about 10G, and data can be stored for more than 1 year without interruption. Considering the factors of access efficiency and the like, the program is internally designed to reserve half-year data volume, and the total storage volume is less than 4.5G calculated by 24 hours per day. When the size of the database file exceeds 4.5G, the program automatically deletes the old data record which is farthest from the current time every time according to 1000 records.
(II) briefly explaining key points to be protected and corresponding technical effects
The key point 1 is that the vehicle information is more comprehensive to collect by directly connecting a vehicle bus or a sensor signal line compared with an external OBD interface.
In the key point 2, the Beidou time service module arranged in the system is used for time service for the internal system, so that all recorded data are attached with time stamps, and the traceability of stored data is improved.
And 3, the real-time performance of man-machine interaction is improved through the capacitive display screen, and the flexible control of the driver on the vehicle information is further improved through the flexible configuration of the interface.
The key point 4 is that the RFID identification module is arranged in the card reader, so that the data transmission mode is convenient and fast, the data transmission mode is simplified, and the traditional mode of relying on cable transmission is upgraded into the transmission mode of swiping the card.
The key point 5 is that the invention stores data in a way of a built-in storage module and a plug-in storage card, stores data in units of seconds, can store vehicle information for one year at most, and provides reliable and solid data basis for the analysis of vehicle conditions by maintenance units or management units.
(III) general technical effects
The key point 1 is that the vehicle information can be comprehensively obtained by directly connecting the vehicle bus or the sensor data line, so that a more comprehensive basis is provided for the vehicle driver to forgive the vehicle condition, and the vehicle fault can be more accurately judged by means of the comprehensive vehicle information.
And the key point 2 is used for making each piece of vehicle information be dependent on time under the action of the data time stamp, and judging the key point of the fault from the data time stamp when the whole vehicle condition data is analyzed.
And 3, the display screen provides a more visual vehicle condition effect for a user, is more comprehensive compared with data of an instrument panel, can display fault judgment information and provides visual display of vehicle conditions and vehicle faults for a driver.
The key point 4 is that the invention reserves the traditional data transmission mode, and the invention transmits data by network cable and data cable, and adds the mode of data flow by radio frequency card on the traditional data transmission mode. The radio frequency card is used for data transfer, convenience and high efficiency of data transmission are improved, and the constraint of cable length and equipment disassembly and assembly of wired transmission is avoided. The traditional data transmission in the invention is used for the centralized transmission of a large amount of data, and a U disk can also be used as a medium for data ferry.
The key point 5 provides a rich data base for maintenance units and management units through the big data storage function of the storage module, and can clearly analyze the fault and judge the fault time by counting and analyzing the change trend of data in a period of time.
The vehicle information acquisition and fault judgment device disclosed by the invention is matched with a vehicle management background system or a vehicle maintenance background system, can realize the situation of returned data, visually display information such as vehicle condition information change trend, vehicle fault occurrence reason and vehicle fault occurrence frequency for a manager, and improve the management efficiency.
Description of the drawings
FIG. 1 is a schematic diagram of a system structure of a vehicle information collection and fault judgment device based on RFID.
Fifth, detailed description of the invention
As shown in fig. 1, an RFID-based vehicle information collection and fault diagnosis apparatus includes three major blocks: the master control board, electric pipe management module, display screen, wherein the master control board includes signal acquisition module, ADC conversion module, treater MCU, storage module, big dipper time service module, RFID recognition module, data transmission module, and the power management plate includes: power module and battery.
According to the invention, the data tee cable is additionally arranged, the data of the bus or the sensor signal line is intercepted in the transmission process, the transmission signal is acquired through the signal acquisition module, and the acquired analog signals of voltage, frequency and the like are subjected to analog-to-digital conversion through the ADC module, converted into digital signals and sent to the MCU for processing.
The MCU carries out data analysis through a probability theory, a mean variance and other primary signal processing calculation method and a data mining algorithm, analyzes original signals, detects whether the current original data have faults or not, periodically calculates the original data, analysis result data and process accumulated quantities (such as parameters of motorcycle hours, total driving mileage and the like) interested by the SPI bus, stores the calculated quantities into a storage module, and gives a timestamp to the generated data by matching with a Beidou time service module to finish accurate storage.
According to the configured data transmission requirement, when the RFID radio frequency card is swiped, the data required in the storage configuration file is directly written into the card, and for some non-real-time collected and non-process accumulated quantities (such as parameters of oil consumption, mileage and the like), the data are written into the card after calculation at the moment of swiping the card. The vehicle historical data can be exported through the data transmission module and can be butted through a network cable, a data line and a maintenance unit or a management unit, and after receiving an uploading instruction, the vehicle historical data uploading device uploads a database file to a remote computer in a UDP or 485 bus mode. The SQLite database file can also be automatically copied through the USB flash disk. After the USB flash disk is inserted into the USB flash disk, the system can identify the USB flash disk and automatically copy the historical data stored in the database into the USB flash disk/out/directory, and in the process of data copying, an indicating signal lamp on the USB flash disk can be turned on, and the USB flash disk is automatically turned off after copying is finished.
The vehicle power supply system supplies power through the power interface of the vehicle, and the vehicle supplies power to the system and charges the internal storage battery in the running or running process. When the vehicle is in a flameout state, the vehicle-mounted intelligent power supply device enters a low-power-consumption mode, power is supplied through a storage battery in the device, and the electric quantity condition of the battery can be mastered in real time through the power indicator lamp.
Claims (5)
1. A vehicle information acquisition and fault diagnosis device based on RFID is characterized by comprising a main control board, an electric management module and a display screen; the main control board is connected with a bus of the vehicle and used for acquiring the analog signal in real time to complete fault prediction; the display screen displays all the fact information and the prediction information through the capacitive screen; the electric tube management module supplies power to the main control board and the display screen;
the master control board consists of a signal acquisition module, an ADC (analog-to-digital converter) conversion module, a processor MCU (microprogrammed control unit), a storage module, a Beidou time service module, an RFID (radio frequency identification) reading module and a data transmission module;
the signal acquisition module intercepts data of a bus or a sensor signal line in a transmission process by additionally installing a data three-way cable, so that transmission signal acquisition is completed and the transmission signal is transmitted to the ADC module;
the ADC module is used for carrying out analog-to-digital conversion on the acquired analog signals, converting the analog signals into digital signals and sending the digital signals to the MCU;
the processor MCU analyzes data through a primary signal processing calculation method and a data mining algorithm, analyzes original signals, detects whether the current original data has faults or not, periodically calculates the original data, analysis result data and process accumulation amount interested by a driver through the SPI bus, and stores the original data, the analysis result data and the process accumulation amount into the storage module;
the Beidou time service module is used for carrying out timestamp recording on the stored information, determining the data storage time and finishing accurate storage;
and the RFID reading module and the data transmission module are used for transmitting the stored data to a maintenance center or a management unit in real time.
2. The RFID-based vehicle information collection and fault diagnosis device as claimed in claim 1, wherein according to the configured transmission data requirement, when the RFID radio frequency card is swiped, the data required in the storage configuration file is directly written into the card, and for some non-real-time collected and non-process accumulated quantities, the data is written into the card after passing through the calculation at the time of swiping the card.
3. The device for vehicle information collection and fault diagnosis based on RFID as claimed in claim 1, wherein historical data of the vehicle can be exported through the data transmission module, and can be interfaced with a network cable, a data cable and a maintenance unit or a management unit, after an upload instruction is received, the database file can be uploaded to a remote computer in a UDP or 485 bus manner, the SQLite database file can also be automatically copied through a usb disk, a/WEGO/out/folder directory is established on the usb disk, after the usb disk is inserted into the device, the system can identify the usb disk and automatically copy the historical data stored in the database to the/WEGO/out/directory, and during the data copying process, an indication signal lamp on the device can be turned on, and after the copying is finished, the indication signal lamp can be turned off automatically.
4. The RFID-based vehicle information collection, fault diagnosis device of claim 1, wherein the power management board comprises: power module and battery.
5. The equipment supplies power through a power interface of the vehicle, and the vehicle supplies power to the equipment and charges an internal storage battery in the running or running process; under the vehicle flame-out state, this equipment gets into the low-power consumption mode, supplies power through the inside battery of device, can master the battery power condition in real time through the power indicator.
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| CN202111282085.3A CN114024989A (en) | 2021-11-01 | 2021-11-01 | Vehicle information acquisition and fault detection device based on RFID |
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| CN202111282085.3A CN114024989A (en) | 2021-11-01 | 2021-11-01 | Vehicle information acquisition and fault detection device based on RFID |
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Cited By (1)
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