CN106940812A - A kind of vehicle tyre information monitoring system based on RFID technique - Google Patents

Abstract

The invention discloses a vehicle tire information monitoring system based on RFID technology, which comprises a tire information transmission module (1), a CAN decoding circuit (2), a PS-LCD touch screen (3) and a power supply (4). The tire information transmission module (1) includes a data processing unit (5), a CAN communication unit (6), an RFID communication unit (7), an Ethernet communication unit (8), and a touch screen communication unit (9). The invention designs a vehicle tire information monitoring system with ARM as the core, based on RFID technology and integrated CAN bus analysis technology. This system uses electronic tags to record information such as tire production and use, and writes the mileage value of the tires into the electronic tags in real time during vehicle driving, realizing the function of fast and accurate information recording, which is convenient for vehicle maintenance personnel to track and trace the tires. Automation and information management, to a certain extent, bring great convenience to the work of vehicle maintenance personnel, and have a wide range of application values.

Description

A vehicle tire information monitoring system based on RFID technology

technical field

The invention relates to a tire information monitoring system, more specifically, relates to a vehicle tire information monitoring system based on RFID technology and integrated with automobile CAN bus analysis technology and a monitoring method thereof.

Background technique

With the rapid development of social economy, my country is entering the era of automobiles. At present, the acquisition of traffic parameters is mainly through detection methods such as ground induction coils, radars, infrared, and floating vehicles, which require high-cost installation and maintenance, and the detection range is limited. The road network provided Traffic information is not comprehensive enough and other defects. As a relatively new data acquisition and transmission technology in the transportation field, radio frequency identification (RFID) technology can quickly identify multiple targets, has strong anti-interference capabilities, and is easy to install. It can collect vehicle speed, license plate, and owner information. The use of RFID technology to collect traffic parameters is the technical support for the exploration of new areas of vehicle-road collaboration.

According to the analysis of experts from the National Rubber Tire Quality Supervision Center, the tires should be replaced when the mileage reaches 50,000 to 60,000 kilometers. Grasp the ground and increase the fuel consumption of the car, so it is very important to monitor the comprehensive average mileage information of the tires. On the other hand, after the tires have been used for a period of time, due to the different degrees of wear of the front and rear wheels, it is necessary to change the tires regularly. If the car owner replaces a second-hand tire, before installing the tire, the usual practice of the car maintenance personnel is to judge where the tire is suitable for installation based on their own experience, but they cannot accurately know the location and installation information of the tire. Only experienced staff can complete the judgment work. From the above analysis, it is an important and complicated task for automobile maintenance plants to obtain tire information. Therefore, it is necessary to design an automobile tire information monitoring system to obtain detailed and accurate tire information for strict use and maintenance. .

Starting from the above actual needs, the present invention develops a vehicle tire information monitoring system with ARM as the core, based on RFID technology and integrated automobile CAN bus analysis technology, which can realize the rapid monitoring of vehicle tire mileage, installation location, production date and other related information. , Accurately write into electronic tags and other functions, realize the traceability, automation and information management of vehicle tires.

Contents of the invention

The purpose of the present invention is to provide a method for quickly and accurately monitoring vehicle tire information and its system design in order to overcome the deficiencies in the existing tire management solutions.

Technical scheme of the present invention is as follows:

A vehicle tire information monitoring system based on RFID technology, including a tire information transmission module, a CAN decoding circuit, a PS-LCD touch screen and a power supply, and the tire information transmission module includes a data processing unit, a CAN communication unit, an RFID communication unit, an Ethernet Network communication unit, touch screen communication unit.

The tire information transmission module is designed with ARM architecture, and its work flow is the first step: enter the system initialization, restore the parameters before shutdown; the second step: start the timer; the third step: when the timing is up, send AT Command to the CAN decoding circuit, and receive the data sent by the CAN decoding circuit, ARM analyzes and processes the data; Step 4: When the mileage difference reaches the preset value, adjust the output power and output power of the RFID read-write module through the Ethernet communication unit Sensitivity, and send an instruction to find the electronic tag inside the corresponding tire; Step 5: After successfully finding the corresponding tag, send an instruction to read the electronic tag information, and read out the mileage information originally stored in the tag; Step 6: Call the data Processing function; Step 7: Adjust the sensitivity of the RFID read-write module again, and write the mileage value into the electronic tag.

The CAN decoding circuit uses the CAN bus analysis technology with multi-master serial communication mode, communicates with the automobile ECU through the OBD interface, and transmits the obtained data to the tire information transmission module through the serial port circuit.

The touch screen is connected with an external control unit through a serial port.

The data processing unit is composed of an ARM chip.

The CAN communication unit communicates with the CAN decoding circuit through the serial port circuit

The RFID communication unit is mainly composed of three parts: RFID read-write circuit, electronic tag, antenna, wherein the RFID read-write circuit selects a UHF (Ultra High Frequency) RFID read-write module with a frequency band of 840MHz-960MHz, and is embedded in the tire The electronic tags need to meet the requirements of small size, long life, and simple operation, so passive electronic tags are selected.

The Ethernet communication unit is composed of a serial port to Ethernet module and a network port, and the module has a built-in TCP/IP protocol stack.

The touch screen communication unit communicates with the touch screen through a serial port.

The working process of the present invention is: the first step: power on and enter the system initialization; the second step: restore the time parameter before shutdown; the third step: start the timer; the fourth step: when the timing is up, the CAN decoding circuit communicates with the automobile ECU , to obtain the required parameters; the fifth step: the CAN decoding module sends the analyzed data to the tire information transmission module through the serial port circuit; the sixth step: the tire information transmission module analyzes, processes and transmits the received data; the seventh step : The touch screen displays the internal information of the electronic label.

If it is the first time to install the invention on a vehicle or to change the tires of the vehicle, it is necessary to set the installation position of the tires through the touch screen, so that the follow-up car maintenance personnel can periodically change the tires according to this parameter. The workflow is the first step: the system is powered on and initialized; the second step: select the code of the tire built-in label through the "scan" button on the touch screen; the third step: start the tire information transmission module to obtain the code of the electronic label; the fourth Step 1: After obtaining the code, return the data to the touch screen through the serial port circuit; Step 5: Input the position information of the tire; Step 6: The touch screen displays "OK" signal, and the setting is successful.

The present invention has following beneficial effect:

The automobile tire information monitoring system designed by the present invention takes ARM as the core, is based on RFID technology, and integrates automobile CAN bus analysis technology. , production date, installation location, new/used tires and other tire-related information can be quickly and accurately written into the electronic tag, which is convenient for vehicle maintenance personnel to carry out tracking, automation and information management of vehicle tires. To a certain extent, it can give The work of vehicle maintenance personnel brings great convenience and has high practical value.

Description of drawings

Figure 1 is a structural diagram of a vehicle tire information monitoring system based on RFID technology.

Fig. 2 is a schematic diagram of an information transmission module model of a vehicle tire information monitoring system based on RFID technology.

Fig. 3 is a logic flow chart of a vehicle tire information monitoring system based on RFID technology.

Fig. 4 is a logic flow chart of the information transmission module of a vehicle tire information monitoring system based on RFID technology.

Fig. 5 is a flow chart of setting logic when the vehicle tire information monitoring system based on RFID technology is used for the first time or tires are replaced.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in the accompanying drawings, a vehicle tire information monitoring system based on RFID technology includes a tire information transmission module (1), characterized in that: the tire information transmission module (1) is electrically connected to a CAN decoding circuit (2), PS-LCD touch screen (3), power supply (4), described power supply (4) electric connection comprises tire information transmission module (1), CAN decoding circuit (2), PS-LCD touch screen (3). The tire information transmission module (1) includes a data processing unit (5), a CAN communication unit (6), an RFID communication unit (7), an Ethernet communication unit (8), and a touch screen communication unit (9).

The tire information transmission module (1) adopts ARM architecture design, and its work flow is the first step: enter the system initialization, restore the various parameters before shutdown; the second step: start the timer; the third step: the timing time is up , send AT commands to the CAN decoding circuit, and receive the data sent by the CAN decoding circuit, ARM analyzes and processes the data; Step 4: When the mileage difference reaches the preset value, adjust the RFID reading and writing module through the Ethernet communication unit The output power and sensitivity of the tire, and send the command to find the electronic tag inside the corresponding tire; Step 5: After successfully finding the corresponding tag, send the command to read the electronic tag information, and read the mileage information originally stored in the tag; Sixth Step 1: Call the data processing function; Step 7: Adjust the sensitivity of the RFID read-write module again, and write the mileage value into the electronic tag.

The CAN decoding circuit (2) communicates with the automobile ECU through the OBD interface, and transmits the obtained data to the tire information transmission module through the serial port circuit.

The touch screen (3) is connected with an external control unit through a serial port.

The data processing unit (5) is composed of an ARM chip.

The CAN communication unit (6) communicates with the CAN decoding circuit through a serial port circuit.

Described RFID communication unit (7) mainly is made up of three parts: RFID read-write circuit, electronic tag, antenna, wherein RFID read-write circuit selects the UHF (Ultra High Frequency) RFID read-write module that frequency band is 840MHz-960MHz, and embedded The electronic tag inside the tire needs to meet the requirements of small size, long life and simple operation, so the passive electronic tag is selected.

The Ethernet communication unit (8) is composed of a serial port to Ethernet module and a network port, and the module has a built-in TCP/IP protocol stack.

The touch screen communication unit (9) communicates with the touch screen (2) through a serial port.

The working process of the present invention is: the first step: power on and enter the system initialization; the second step: restore the time parameter before shutdown; the third step: start the timer; the fourth step: when the timing is up, the CAN decoding circuit communicates with the automobile ECU , to obtain the required parameters; the fifth step: the CAN decoding module sends the analyzed data to the tire information transmission module through the serial port circuit; the sixth step: the tire information transmission module analyzes, processes and transmits the received data; the seventh step : The touch screen displays the internal information of the electronic label.

The present invention is mainly controlled by the tire information transmission module (1), and is characterized in that: the tire information transmission module (1) is electrically connected to the CAN decoding circuit (2), the PS-LCD touch screen (3), and the power supply (4). The electrical connection of the power supply (4) described above includes a tire information transmission module (1), a CAN decoding circuit (2), and a PS-LCD touch screen (3). The tire information transmission module (1) includes a data processing unit (5), a CAN communication unit (6), an RFID communication unit (7), an Ethernet communication unit (8), and a touch screen communication unit (9).

When the present invention runs:

Step 1: Boot into the system initialization.

Step 2: Restore the parameters before shutdown.

Step 3: Start the timer to work.

Step 4: When the timing is up, the CAN decoding circuit communicates with the car ECU to obtain the required parameters

Step 5: The CAN decoding module sends the parsed data to the tire information transmission module through the serial port circuit.

Step 6: The tire information transmission module analyzes, processes and transmits the received data.

Step 7: The touch screen displays the internal information of the electronic label.

The workflow of the tire information transmission module:

Step 1: Boot into the system initialization.

Step 2: Start the timer to work.

Step 3: When the timing is up, send the AT command to the CAN decoding circuit, and receive the data sent by the CAN decoding circuit, and the ARM will analyze and process the data.

Step 4: When the mileage difference reaches the preset value, adjust the output power and sensitivity of the RFID read-write module through the Ethernet communication unit, and send an instruction to find the electronic tag inside the corresponding tire.

Step 5: After successfully finding the corresponding tag, send an instruction to read the electronic tag information, and read out the mileage information originally stored in the tag.

Step 6: Call the data processing function.

Step 7: Adjust the sensitivity of the RFID read-write module again, and write the mileage value into the electronic tag.

If it is the first time to install the invention on a vehicle or to change the tires of the vehicle, it is necessary to set the installation position of the tires through the touch screen, so that the follow-up car maintenance personnel can periodically change the tires according to this parameter. Its workflow is:

Step 1: Power on and initialize the system.

Step 2: Select the code of the tire's built-in label through the "Scan" button on the touch screen.

Step 3: Start the tire information transmission module to obtain the code of the electronic label.

Step 4: After obtaining the code, return the data to the touch screen through the serial port circuit.

Step 5: Enter the location information of the tire.

Step 6: The touch screen displays "OK" signal, and the setting is successful.

The present invention adopts the vehicle tire information monitoring system based on RFID technology and integrated automobile CAN bus analysis technology designed by ARM architecture. ARM can better perform human-computer interaction, and is mainly responsible for analyzing and processing the parameters passed in by the user through the touch screen, and controlling CAN decoding. The module communicates with the car ECU and the work of the RFID read and write module.

The vehicle tire information monitoring system is installed on large vehicles such as trucks and trucks, which can monitor tire mileage and other information in real time, avoiding the increase of vehicle fuel consumption due to excessive tire wear, which can save fuel costs; avoid tire transposition, replacement Losses such as vehicle damage repair costs and new tire purchase costs caused by delays. Vehicle maintenance personnel can quickly and accurately obtain tire usage information through this system, and carry out comprehensive management of vehicle tires.

The above description is only one of the preferred specific embodiments of the present invention, and the usual changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. a kind of vehicle tyre information monitoring system based on RFID technique, including tire information delivery module (1), CAN decoding Circuit (2), PS-LCD touch-screens (3) and power supply (4), described tire information delivery module (1) include data processing unit (5), CAN communication unit (6), RFID communication unit (7), ethernet communication unit (8), touch panel communication unit (9).

2. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, including tire information delivery Module (1), it is characterised in that：Described tire information delivery module (1) uses ARM architecture designs, and its workflow is first Step：Into system initialization, recover the parameters before shutdown；Second step：Start timer；3rd step：Timing is arrived, hair Send AT to instruct and give CAN decoding circuits, and receive the data that CAN decoding circuits are sent, ARM is analyzed data, handled；The Four steps：When mileage difference reaches preset value, power output and the sensitivity of RFID read-write module are adjusted by ethernet communication unit, And send the instruction for searching corresponding tire internal electron label；5th step：Successful search sends to after corresponding label and reads electronics The instruction of label information, reads the mileage information of inside tags storage originally；6th step：Call data processing function；7th step： The sensitivity of RFID read-write module is adjusted again, and mileage value is write into electronic tag.

3. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：Described CAN decoding circuits (2) realize the function of obtaining mileage value, and the circuit utilizes the CAN solution with how main serial communication mode Analysis technology, is communicated by OBD interfaces with automobile ECU, and tire information delivery module is sent to by serial port circuit after obtaining data.

4. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：Described PS-LCD touch-screens (3) are connected by serial ports with external control unit outside.

5. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：Described Data processing unit (5) is made up of ARM chips.

6. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：Described CAN communication unit (6) is communicated by serial port circuit with CAN decoding circuits.

7. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：Described RFID communication unit (7) is mainly made up of three parts：RFID read-write circuit, electronic tag, antenna, wherein RFID read-write circuit is 840MHz-960MHz UHF (hyperfrequency) RFID read-write module, and the electronic tag for being embedded in inside tires is passive electronic mark Label.

8. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：Described Ethernet communication unit (8) turns ethernet module by serial ports and network interface is constituted, ICP/IP protocol stack built in module.

9. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：Described Touch panel communication unit (9) passes through serial communication with touch-screen (2).

10. a kind of vehicle tyre information monitoring system based on RFID technique according to right 1, it is characterised in that：This hair Bright workflow is：The first step：Start enters system initialization；Second step：Recover the time parameter before shutdown；3rd step： Start timer；4th step：Timing is arrived, and CAN decoding circuits are communicated with automobile ECU, parameter needed for obtaining；5th step：CAN Data after parsing are sent to tire information delivery module by decoder module by serial port circuit；6th step：Tire information delivery Module is parsed to receiving data, handled, transmitted；7th step：Touch-screen shows electronic tag internal information.