WO2021237422A1

WO2021237422A1 - Tire pressure sensor identification method, related apparatus and system

Info

Publication number: WO2021237422A1
Application number: PCT/CN2020/092159
Authority: WO
Inventors: 伍勇
Original assignee: 深圳市道通合创软件开发有限公司; 深圳市道通科技股份有限公司
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-12-02

Abstract

Disclosed is a tire pressure sensor identification apparatus, comprising: a storage module (10) for saving identity information of a tire pressure sensor, a communication module (20) for communicating with an electronic control unit of a vehicle, a processing module (30), and a radio-frequency emission module (40) for outputting identity information. By means of the tire pressure sensor identification apparatus, the saved identity information can be output to the corresponding vehicle, such that even if the tire pressure sensor is not in an activated state, the vehicle can still identify the tire pressure sensor, and it is convenient for a user to perform a unified identification operation after unified acquisition of the identity information, thereby improving the efficiency of identifying the tire pressure sensor. Further disclosed are a tire pressure sensor identification system using the tire pressure sensor identification apparatus, and a corresponding tire pressure sensor identification method, which also have the same technical effect.

Description

Tire pressure sensor identification method and related device and system

Technical field

The present invention relates to the field of vehicle technology, and in particular to a tire pressure sensor identification method and related devices and systems.

Background technique

Tire Pressure Monitor System (Tire Pressure Monitor System, TPMS) mainly includes indirect type and direct type. Indirect TPMS uses the wheel speed sensor of the anti-lock braking system (ABS) to compare the speed difference between tires to achieve the purpose of monitoring tire pressure. It is a passive type afterwards. Direct TPMS uses the tire pressure sensor installed in each tire to directly measure the air pressure of the tire, which is an active prevention type in advance. Since the former is not as accurate as the latter in determining faults, direct TPMS is currently used.

Direct TPMS generally includes a tire pressure sensor and an electronic control unit (ECU). During initialization, the electronic control unit must store the identification codes of all tire pressure sensors to ensure that the electronic control unit can identify each tire. Tire pressure sensor in. At the same time, only when the tire pressure sensor is activated, can the electronic control unit recognize the radio frequency signal sent by the tire pressure sensor, and then read the corresponding identification code.

In the identification process of the tire pressure sensor, because the activation time of the tire pressure sensor is limited, once the activation period of the tire pressure sensor is over (that is, the tire pressure sensor that enters the sleep state is energy-saving and does not emit radio frequency signals), and the electronic control unit If there is no time for identification during this period, the identification process for the tire pressure sensor must be restarted. Therefore, in order to avoid missing the activation period of the tire pressure sensor, the existing implementation requires each tire to perform a separate identification operation to ensure that the electronic control unit recognizes each tire pressure sensor. Throughout the identification process, the user needs to go back and forth from the tire position to the cab multiple times and repeat the operation. Especially in vehicles with two or more wheels, the tire pressure sensor using the above-mentioned identification method is inefficient in the identification operation.

Summary of the invention

In order to solve the above technical problems, the present invention provides a tire pressure sensor identification device that can store the identity information of the tire pressure sensor and can also output the identity information.

In order to solve the above problems, the present invention provides a tire pressure sensor identification device, including: a storage module, a communication module, a processing module, and a radio frequency transmission module; wherein the storage module, the communication module, and the radio frequency transmission module are respectively connected to Communication connection of the processing module;

The storage module is used to store the identity information of the tire pressure sensor;

The communication module is used to communicate with the electronic control unit of the vehicle and receive response information fed back by the electronic control unit;

The processing module is used to analyze the response information received by the communication module to determine whether the electronic control unit turns on the sensor learning mode, and if turned on, controls the radio frequency transmitting module to send the tire pressure sensor corresponding to the vehicle ’S identity information.

Further, the storage module is also used to store the communication frequencies of tire pressure sensors of different types of vehicles;

The radio frequency transmitting module is used to simulate the communication frequency of the tire pressure sensor of the vehicle to send the identity information of the tire pressure sensor corresponding to the vehicle.

Still further, the tire pressure sensor identification device further includes: an acquisition module, which is communicatively connected with the processing module, configured to acquire the identity information of the tire pressure sensor, and store it in the storage module after being processed by the processing module.

In another step, the acquisition module includes an activation module and a radio frequency receiving module, the activation module is used to activate the tire pressure sensor by outputting a low-frequency signal; the radio frequency receiving module is used to receive the identity information sent by the activated tire pressure sensor.

As an improvement, the acquisition module includes an input module configured to receive the identity information of the tire pressure sensor input by the user.

As an improvement, the tire pressure sensor identification device further includes a display module, which is communicatively connected with the processing module, and is used to display the acquired identity information and working status of the tire pressure sensor.

In order to solve the above problems, the present invention also provides a tire pressure sensor identification system, including: a tire pressure sensor, an electronic control unit, and the tire pressure sensor identification device as described in any one of the above; The electronic control unit and the tire pressure sensor are in communication connection.

In order to solve the above problems, the present invention also provides a tire pressure sensor identification method, which includes the following steps:

After establishing a communication connection with the electronic control unit of the vehicle, receiving response information fed back by the electronic control unit;

Analyze the received response information to determine whether the electronic control unit turns on the sensor learning mode, if it is turned on, obtain the identity information of the tire pressure sensor corresponding to the vehicle from the stored identity information of the tire pressure sensor;

Sending the identity information of the tire pressure sensor corresponding to the vehicle to the electronic control unit.

Further, before the step of receiving response information fed back by the electronic control unit after establishing a communication connection with the electronic control unit of the vehicle, the method further includes the following steps:

Activate the tire pressure sensor by outputting a low-frequency signal;

Receive the identity information sent by the activated tire pressure sensor and save it.

Still further, before the step of receiving response information fed back by the electronic control unit after establishing a communication connection with the electronic control unit of the vehicle, the method further includes the following steps:

Receive the identity information of the tire pressure sensor input by the user and save it.

Furthermore, the tire pressure sensor identification method further includes the following steps:

The communication frequencies of tire pressure sensors of different types of vehicles are stored in advance.

Wherein, the step of sending the identity information of the tire pressure sensor corresponding to the vehicle to the electronic control unit includes:

Sending the identity information of the tire pressure sensor corresponding to the vehicle to the electronic control unit by simulating the communication frequency of the tire pressure sensor of the vehicle.

Compared with the prior art, the present invention has the following beneficial effects: by providing a storage unit in the tire pressure sensor identification device, the identification information of the tire pressure sensor is saved when the tire pressure sensor is received. And is equipped with a radio frequency transmitting unit, so that the device can simulate the wireless signal sent by the corresponding tire pressure sensor, so that the electronic control unit can uniformly identify each tire pressure sensor on the car, avoiding the user's multiple reciprocating and inflating tires , The complicated operation of deflation simplifies the operation process of the electronic control unit to identify the tire pressure sensor, improves the efficiency of the identification operation, and improves the user experience.

Description of the drawings

Figure 1 is a schematic diagram of the basic functional framework of the tire pressure sensor identification device of the present invention;

2 is a schematic diagram of the functional framework of the first embodiment of the tire pressure sensor identification device of the present invention;

3 is a schematic diagram of the functional framework of the second embodiment of the tire pressure sensor identification device of the present invention;

Figure 4 is a schematic diagram of the frame of the tire pressure sensor identification system of the present invention;

Figure 5 is a schematic diagram of the basic flow of the tire pressure sensor identification method of the present invention;

Figure 6 is a schematic diagram of a complete flow chart of the tire pressure sensor identification method of the present invention;

Figure 7 is a schematic flow chart of the tire pressure sensor identification method of the present invention;

Fig. 8 is another flowchart of the tire pressure sensor identification method of the present invention.

Description of Reference Signs: 1. Tire pressure sensor identification device; 2. Tire pressure sensor; 3. Electronic control unit; 10, storage module; 20, communication module; 30, processing module; 40, radio frequency transmitting module; 50, acquisition module ; 51, activation module; 52, radio frequency receiving module; 53, input module.

Detailed ways

Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments, which do not depart from the scope of the present invention, and the descriptions and diagrams therein are essentially for illustrative purposes, rather than limiting this invention.

First, the working principle of tire pressure monitoring in the prior art and the identification steps of the tire pressure sensor are introduced in detail. The tire pressure monitoring system (direct TPMS) generally learns the pressure value of each tire by building a tire pressure sensor in each tire and receiving the wireless signal (radio frequency signal) sent back by the tire pressure sensor. When monitoring the tire pressure of automobile tires, the electronic control unit (usually a single-chip microcomputer or computer with wireless communication function) in the tire pressure monitoring system must first record the identification code (identification ID) of the tire pressure sensor in each tire And the tire corresponding to the tire pressure sensor. This recording process is the process of the electronic control unit identifying the tire pressure sensor. After the identification is completed, the identification code and the corresponding tire position information are stored in the electronic control unit. When the electronic control unit receives the wireless signal containing the identification code, it will also read the tire pressure information in the wireless signal. The control unit obtains the tire pressure information of the corresponding tire and displays it to the driver intuitively.

Under normal circumstances, because the tire pressure sensor is installed in the tire, it cannot be connected through a cable, and can only communicate with the electronic control unit through a wireless signal (usually a radio frequency signal). And because the battery inside the tire pressure sensor cannot be charged, in order to save power, the tire pressure sensor enters a sleep mode to save power under normal circumstances. Only when it is activated by a special activation signal (low-frequency signal, low power consumption but short transmission distance) or tire leaks (tyre pressure changes) or tire movement, will it send out carrying identification information (identification code) and tire pressure information Wireless signal (RF signal). At the same time, due to the general use of an integrated design to reduce the volume, the battery of the tire pressure sensor can only be replaced as a whole after it is exhausted. Every time the tire pressure sensor is replaced, the electronic control unit must re-identify the new tire pressure sensor.

Hereinafter, each embodiment of the present invention will be further described in detail with reference to the accompanying drawings 1-6.

Referring to FIG. 1, an embodiment of the present invention provides a tire pressure sensor identification device. As shown in Figure 1, the tire pressure sensor identification device 1 includes: a storage module 10, a communication module 20, a processing module 30, and a radio frequency transmission module 40; wherein the storage module 10, the communication module 20, and the radio frequency transmission module 40 are respectively associated with the processing module 30 communication connection;

The storage module 10 is used to store the identity information of the tire pressure sensor 2;

The communication module 20 is used to communicate with the electronic control unit 3 of the vehicle and receive response information fed back by the electronic control unit 3;

The processing module 30 is used to analyze the response information received by the communication module 20 to determine whether the electronic control unit 3 has enabled the sensor learning mode, and if enabled, controls the radio frequency transmitting module 40 to send the identity information of the tire pressure sensor 2 corresponding to the vehicle.

Specifically, the communication module 20 can communicate with the electronic control unit 3 (ECU) of the vehicle in a wireless or wired manner. After connection, the communication module 20 can initiate a sensor learning request to the vehicle and receive the electronic control unit 3 ( ECU) response information fed back. Wherein, the response information is used to indicate whether the vehicle has successfully turned on the sensor learning mode, and may include, but is not limited to, relevant information of the vehicle, such as the vehicle model, manufacturer, license plate number, and other information. After the electronic control unit 3 turns on the learning mode (the electronic control unit 3 of the tire pressure monitoring system is usually located inside the vehicle, the essence of the vehicle learning mode is that the electronic control unit 3 turns on the learning mode), the tire pressure sensor identification device 1 will save The identity information is sent to the electronic control unit 3 in a manner that simulates the wireless signal when the tire pressure sensor 2 is activated. In this way, when the operator is inconvenient to activate the tire pressure sensor 2; or the tire pressure sensor 2 has entered the activation period, but the electronic control unit 3 is inconvenient to start the learning mode, through the signal simulation of the tire pressure sensor identification device 1 of the present invention, no matter Whether the tire pressure sensor 2 is activated or not, the electronic control unit 3 can record the identity information of the tire pressure sensor 2, which facilitates the identification operation of the tire pressure monitoring system. In this embodiment, the processing module 30 is the control center of the tire pressure sensor identification device 1, and may be a Micro Controller Unit (MCU), which is used to control various operations of the tire pressure sensor identification device 1.

In this embodiment, the identity information of the tire pressure sensor 2 stored in the storage module 10 may be written into the storage module 10 by the R&D personnel during the development of the tire pressure sensor identification device 1, or it may be a tire pressure sensor identification device. 1 The embodiment of the present invention does not limit the information obtained from the outside and stored in the storage module 10. The storage module 10 can store the identity information of one or more tire pressure sensors 2, and can also store the identity information of tire pressure sensors of different types of vehicles.

It should be emphasized that in the embodiment of the present invention, the identity information of the tire pressure sensor 2 is used to uniquely identify the tire pressure sensor 2, and the identity information of different tire pressure sensors 2 is different. It mainly includes the identification code of the tire pressure sensor 2. The identification code is generally the unique physical address of the tire pressure sensor 2 to distinguish it from the tire pressure sensor 2 in other tires.

In other embodiments, the identity information of the tire pressure sensor 2 includes, but is not limited to, the identification code, model, manufacturer, use date, battery capacity information and other information of the tire pressure sensor 2.

In other embodiments, the communication module 20 may also be used to realize external communication of the tire pressure sensor identification device 1. For example, for the information interaction with the electronic control unit 3, or the information interaction with the on-board automatic diagnosis system of a car, the communication mode of the communication module 20 may be a wired or wireless connection mode to achieve communication.

In this embodiment, the storage module 10 is also used to store the communication frequencies of the tire pressure sensors 2 of different types of vehicles, so that the tire pressure sensor recognition device 1 is compatible with or recognizes different types of vehicles. Specifically, the communication frequency of the tire pressure sensor 2 will adopt a corresponding communication frequency according to the adapted vehicle type. The storage module 10 stores the communication frequencies of tire pressure sensors 2 of different types of vehicles. For example, the communication frequency of tire pressure sensor 2 corresponding to vehicle type 1 is f1, the communication frequency of tire pressure sensor 2 corresponding to vehicle type 2 is f2, and so on. Therefore, the tire pressure sensor identification device 1 of the present invention can be compatible with multiple different types of vehicles (tire pressure sensors). Generally, the tire pressure sensors 2 on the same vehicle all use the same communication frequency; the tire pressure sensors 2 on the same type of vehicle have the same communication frequency, and the tire pressure sensors 2 on different types of vehicles have different communication frequencies. The communication frequency of the tire pressure sensor 2 generally adopts a radio frequency. The radio frequency signal has higher anti-interference and longer propagation distance, which is convenient for the tire pressure sensor 2 to send the tire pressure information to the electronic control unit 3 in the vehicle compartment in real time.

Specifically, the radio frequency transmitting module 40 is used to simulate the communication frequency of the tire pressure sensor 2 of the vehicle to send the identity information of the tire pressure sensor 2 corresponding to the vehicle.

In a specific implementation, the processing module 30 analyzes the response information fed back by the vehicle to obtain the model of the vehicle, thereby acquiring the communication frequency of the tire pressure sensor corresponding to the model from the storage module 10 according to the model of the vehicle, and controlling the radio frequency transmitting module 40 Simulate the communication frequency to send the identity information of the tire pressure sensor corresponding to the vehicle. The radio frequency transmitting module 40 uses the form of analog communication frequency to send information, and is used to simulate the tire pressure sensor 2 during the process of the electronic control unit 3 identifying the tire pressure sensor 2 to facilitate the identification of the electronic control unit 3. Through the above solution, the tire pressure sensor identification device 1 of the present invention can send identity information to the electronic control unit 3 for identification instead of the tire pressure sensor 2 when the tire pressure sensor 2 is not activated.

In other embodiments, the radio frequency transmitting module 40 may also send the identity information of the tire pressure sensor 2 stored in the storage module 10 to the electronic control unit 3 through the communication cable, and the electronic control unit 3 has completed the identification of the tire pressure sensor 2 .

Optionally, the radio frequency transmitting module 40 can only transmit the identity information of one tire pressure sensor 2 on the vehicle at a time, that is, only one tire pressure sensor 2 is identified in a learning process. If you want to identify multiple tire pressure sensors 2 on the vehicle, you need more Turn on the learning mode of the vehicle at a time; it is also possible to transmit the identity information of multiple or all tire pressure sensors 2 on the vehicle at one time, that is, one learning process can complete the identification of multiple or all tire pressure sensors 2 on the vehicle.

In this embodiment, the tire pressure sensor identification device 1 further includes: an acquisition module 50 communicatively connected with the processing module 30 for acquiring the identity information of the tire pressure sensor 2 and storing it in the storage module 10 after being processed by the processing module 30.

By uniformly acquiring or collecting the identity information sent by the tire pressure sensor 2 that needs to be identified in the vehicle, the cumbersome process of having to operate the electronic control unit 3 every time a tire pressure sensor 2 is identified can be avoided, and at the same time, it is also convenient for electronic control. Unit 3 recognizes all tire pressure sensors 2 at once.

As shown in FIG. 2, in the first embodiment, the acquisition module 50 includes an activation module 51 and a radio frequency receiving module 52. The activation module 51 is used to activate the tire pressure sensor 2 by outputting a low-frequency signal; the radio frequency receiving module 52 is used to receive The identity information sent by the activated tire pressure sensor 2.

Wherein, the activation module 51 and the radio frequency receiving module 52 are respectively connected to the processing module 30 in communication. Specifically, the processing module 30 controls the activation module 51 to activate the tire pressure sensor 2 by outputting a low-frequency signal, so that the tire pressure sensor 2 sends out identity information. In addition, when the tire pressure sensor 2 sends out the identity information, it also sends the pressure information of the current tire (such as tire pressure value, temperature value, etc.). Since the battery of the tire pressure sensor 2 cannot be replaced, the tire pressure sensor 2 is in a dormant state when the tire pressure does not change or an activation signal is not received, so as to save battery consumption. Therefore, when the tire pressure sensor 2 needs to be identified, the existing implementation method is to change the tire pressure in the form of inflation and deflation. The tire pressure sensor 2 enters the active state due to the change in air pressure, and sends out wireless signals (including identity information). And tire pressure information, etc.), generally radio frequency signals. However, the activation method of tire inflation and deflation is complicated. The present invention adopts the activation module 51 that sends low-frequency signals in the acquisition module 50, so that the sleeping tire pressure sensor 2 can be activated by the low-frequency signals, eliminating the need for tires. The tedious operation of charging and deflation makes the activation of the tire pressure sensor 2 more convenient.

At the same time, the radio frequency receiving module 52 uses a radio frequency signal receiver to receive the radio frequency signal sent by the tire pressure sensor 2 when it receives a low frequency signal or tire pressure changes, and sends the received radio frequency signal to the processing module 30 for processing. Then it is sent to the storage module 10 for storage. Wherein, the radio frequency signal may include not only the identity information of the tire pressure sensor 2, but also the air pressure information measured by the tire pressure sensor 2, and the like. Through the above method, the identity information of one or more tire pressure sensors 2 to be identified can be saved in the storage module 10, so that when the electronic control unit 3 of the vehicle turns on the sensor learning mode, the radio frequency transmitter module 40 sends the tire pressure sensor analogously. 2 to complete the vehicle's learning function of tire pressure sensor 2.

As shown in FIG. 3, in the second embodiment, the acquisition module 50 may include an input module 53 for receiving the identity information of the tire pressure sensor 2 input by the user.

Among them, the input module 53 communicates with the processing module 30. The input module 53 receives the identification code (identity information) of the tire pressure sensor 2 actively input by the user, and matches the communication frequency of the tire pressure sensor 2 of different types of vehicles stored in the storage module 10. And save the matching relationship. Through the operation of matching the input identification code with the pre-stored communication frequency, the tire pressure sensor identification device 1 does not need to activate the tire pressure sensor 2, and only the known identification code can match the corresponding identification information and provide it to the electronic control Unit 3. At the same time, it is also convenient when the electronic control unit 3 turns on the learning mode and the tire pressure sensor 2 is inconvenient to activate, the radio frequency transmitter module 40 can simulate the corresponding radio frequency signal, so that the identity information of the tire pressure sensor 2 can be transmitted to the electronic control unit 3 in time. middle.

In specific implementation, the input module 53 is a general text input device or a code input device (the code includes but is not limited to a barcode, two-dimensional code, etc.), which is convenient for the user to actively input the identification code of the tire pressure sensor 2, such as a barcode, two-dimensional code, or Corresponding to facilitate active input of numbers and/or character codes, etc. The input module 53 can also adopt a keyboard or a handwriting screen or a combination of the two, or adopt an input device that is convenient for receiving identification information input by an intermediate device or auxiliary device, such as a camera, a barcode/two-dimensional code scanning device, and a point-to-point information transmission device.

In a preferred embodiment, the first embodiment can be implemented in combination with the second embodiment, so that the tire pressure sensor recognition device 1 can not only obtain the identity information from the activated tire pressure sensor 2, but also obtain the identity information through user input. The identity information.

In a preferred embodiment, the tire pressure sensor identification device 1 further includes a display module (not shown in the figure), which is communicatively connected with the processing module 30, and is used to display the acquired identity information and working status of the tire pressure sensor 2. Wherein, the working state may include but is not limited to the pressure value, temperature value of the tire detected by the tire pressure sensor 2, the remaining power of the tire pressure sensor 2, and so on. By setting the display module, it is convenient for the user to intuitively understand the current operating state and the acquired identity information, so that the use of the tire pressure sensor 2 can be more convenient and user-friendly. In addition, the user can view the relevant information of the tire pressure sensor 2 through the display module, and can modify the information of the tire pressure sensor 2 accordingly, such as modifying the identification code of the tire pressure sensor 2, and save the modified information after confirmation.

Referring to FIG. 4, an embodiment of the present invention also provides a tire pressure sensor identification system. As shown in FIG. 4, the tire pressure sensor identification system may include: tire pressure sensor 2, electronic control unit 3, and tire pressure sensor identification device 1 described in the above embodiments; tire pressure sensor identification device 1 and electronic control unit 1 respectively Unit 3 and tire pressure sensor 2 are connected in communication.

In specific implementation, the communication module 20 in the tire pressure sensor identification device 1 is communicatively connected with the electronic control unit 3, and the activation module 51 and the radio frequency receiving module 52 in the tire pressure sensor identification device 1 are communicatively connected with the tire pressure sensor 2 respectively. The tire pressure sensor recognition device 1 uniformly collects and stores the identity information of the tire pressure sensor 2 in each tire. When the electronic control unit 3 needs to identify the tire pressure sensor 2, such as the first start of the tire pressure monitoring system or a certain tire pressure sensor 2 After the battery is replaced due to failure or other reasons, the tire pressure sensor identification device 1 can simulate the corresponding tire pressure sensor 2 to send out radio frequency signals to facilitate the identification by the electronic control unit 3. The operation restriction that requires activation of the tire pressure sensor 2 during identification is avoided, and the operation restriction that must be returned to the cab to operate the electronic control unit 3 for identification during the activation period of the tire pressure sensor 2 is avoided. This makes the identification operation of the tire pressure sensor 2 identification system fast and efficient, and also facilitates user operations. For the component modules and specific functions of the tire pressure sensor identification device 1, please refer to part or all of the content described in the above-mentioned embodiment, which will not be repeated here.

Referring to FIG. 5, an embodiment of the present invention also provides a tire pressure sensor identification method. Wherein, the tire pressure sensor identification method is applied to the tire pressure sensor identification device 1 involved in the above-mentioned embodiment. As shown in Figure 5, the method includes the following steps:

510. After establishing a communication connection with the electronic control unit 3 of the vehicle, receive response information fed back by the electronic control unit 3;

520. Analyze the received response information to determine whether the electronic control unit 3 turns on the sensor learning mode, and if turned on, obtain the identity information of the tire pressure sensor 2 corresponding to the vehicle from the stored identity information of the tire pressure sensor 2;

530. Send the identity information of the tire pressure sensor 2 corresponding to the vehicle to the electronic control unit 3.

In this embodiment, the tire pressure sensor identification device 1 can communicate with the vehicle's electronic control unit 3 (ECU) in a wireless or wired manner. After connection, the tire pressure sensor identification device 1 initiates a sensor learning request to the vehicle, and Receive response information from the vehicle's electronic control unit 3 (ECU). Among them, the response information is used to indicate whether the vehicle has successfully turned on the sensor learning mode, and may contain relevant information of the vehicle, such as the vehicle model, manufacturer, license plate number, and other information. Further, the response information is analyzed to determine whether the vehicle has turned on the sensor learning mode. If it is turned on, the vehicle can be obtained from the identity information of the tire pressure sensor 2 pre-stored in the tire pressure sensor identification device 1 The identity information of the corresponding tire pressure sensor 2 is sent to the vehicle, so that the vehicle completes the identification operation.

In this embodiment, the identification information of the tire pressure sensor 2 includes the identification code of the tire pressure sensor 2 for uniquely identifying the tire pressure sensor 2. The identification information of different tire pressure sensors 2 is different. It is understandable that the pre-stored identification information of the tire pressure sensor 2 may be written into the storage module 10 by the R&D personnel during the development of the tire pressure sensor identification device 1, or it may be obtained from the outside by the tire pressure sensor identification device 1. What is received and stored in the storage module 10 is not limited in the embodiment of the present invention.

In other embodiments, the identity information also includes, but is not limited to: specific data such as model number, manufacturer, date of use, battery capacity information, and so on.

In this embodiment, through the handshake operation, the tire pressure sensor identification device 1 can establish a relatively stable connection with the electronic control unit 3 provided inside the vehicle, so that the electronic control unit 3 does not need to perform one by one when identifying the tire pressure sensor 2. The activation operation simplifies the identification process.

At the same time, it also effectively avoids the tire pressure sensor recognition device 1 unilaterally sending information for a long time and wasting electric energy, so as to extend its battery life, especially when it adopts the implementation form of a handheld device.

In a preferred embodiment, as shown in FIG. 6, after performing step 510, after establishing a communication connection with the electronic control unit 3 of the vehicle, before receiving the response information fed back by the electronic control unit 3, the tire pressure sensor identification method It can also include the following steps:

200. Activate the tire pressure sensor 2 by outputting a low-frequency signal;

300. Receive the identity information sent by the activated tire pressure sensor 2 and save it.

The above solution is a solution for acquiring the identity information of the tire pressure sensor 2 through activation. During the activation process, the radio frequency signal sent by the tire pressure sensor 2 and the identity information contained therein are obtained.

400. Receive and save the identity information of the tire pressure sensor 2 input by the user.

The solution is to identify the tire pressure sensor 2 uniquely corresponding to the identity information by receiving the identity information input by the user. There must be preset communication frequencies of tire pressure sensors 2 of different vehicle types as support to match the input identity information with the preset communication frequency, so that the electronic control unit 3 can be matched with the communication frequency and identity information. The tire pressure sensor 2 realizes communication. Specifically, when the electronic control unit 3 enters the learning mode, the tire pressure sensor identification device 1 sends the identity information to the electronic control unit 3 through the matched communication frequency, which is equivalent to the electronic control unit 3 identifying the corresponding tire pressure Sensor 2.

In this embodiment, after performing step 510, after establishing a communication connection with the electronic control unit 3 of the vehicle, before receiving the response information fed back by the electronic control unit 3, the tire pressure sensor identification method may further include the following steps:

100. Pre-store the communication frequencies of tire pressure sensors 2 of different types of vehicles.

Wherein, step 530 sending the identity information of the tire pressure sensor 2 corresponding to the vehicle to the electronic control unit 3 may specifically include the following steps:

531. Send the identity information of the tire pressure sensor 2 corresponding to the vehicle to the electronic control unit 3 by simulating the communication frequency of the tire pressure sensor 2 of the vehicle.

Specifically, the tire pressure sensor identification device 1 may obtain the communication frequency of the tire pressure sensor 2 corresponding to the model of the vehicle from the pre-stored communication frequencies according to the model of the vehicle included in the response information. The tire pressure sensor identification device 1 simulates the communication frequency of the tire pressure sensor 2, so that the electronic control unit 3 can also receive the same radio frequency signal as the tire pressure sensor 2 outside of the time period when the tire pressure sensor 2 is not activated, and obtain it from it The identification code of the tire pressure sensor 2 and other identification information. This step makes the identification process of the electronic control unit 3 do not need to activate the tire pressure sensor 2 synchronously, which is convenient for the user to operate the electronic control unit 3, and also saves the user from running back and forth between the tire and the cab, and improves the tire pressure. The recognition efficiency of the pressure sensor recognition system.

In summary, the tire pressure sensor identification device 1 of the present invention can store the identity information of the tire pressure sensor 2 in the storage module 10, and simulate the tire pressure sensor 2 through the radio frequency transmitting module 40 to send corresponding identity information, avoiding the electronic control unit 3 When identifying the tire pressure sensor 2, the sensor must be an active operating limit. Through the tire pressure sensor identification device 1 of the present invention, the electronic control unit 3 can identify the tire pressure sensor 2 at any time, and the identification does not have to be limited to the time period when the tire pressure sensor 2 is activated. The identification operation of the electronic control unit 3 is simplified, and it is also convenient for users to use. The tire pressure sensor identification system and tire pressure sensor identification method using the tire pressure sensor identification device 1 of the present invention also have the above-mentioned advantages.

As shown in Figure 7, the embodiment of the present invention describes the method of writing the tire pressure sensor's identification according to the OBD (on-Board Diagnostics) bus (such as CAN controller area network bus), so that the electronic control unit ( ECU) recognizes the identification of each tire pressure sensor, and sends data such as the pressure and temperature of the tire pressure sensor to the ECU through the tire pressure sensor identification device.

The specific steps are detailed as follows:

Step 701: The tire pressure sensor identification device sends a command to read the identification information of the tire pressure sensor (for example, the ID of the tire pressure sensor).

Step 702: The tire pressure sensor sends data such as the tire pressure sensor ID, tire pressure, and tire temperature by radio frequency.

Step 703: The tire pressure sensor identification device communicates with the ECU of the car through the OBD bus, and sends the ID of the tire pressure sensor to the ECU.

Step 704: The ECU replies that the ID of the tire pressure sensor of the tire pressure sensor identification device has been written through an ACK (Acknowledge Character).

Step 705: The tire pressure sensor identification device sends the tire pressure sensor ID previously received from the tire pressure sensor, and the tire pressure and tire temperature sensed by the tire pressure sensor to the ECU.

The tire pressure sensor identification device can simulate the wireless signal sent by the corresponding tire pressure sensor, which is convenient for the electronic control unit to uniformly identify each tire pressure sensor on the car, avoiding the user's multiple reciprocating running and tire inflation and deflation. The complicated operation simplifies the operation process of the electronic control unit identifying the tire pressure sensor, improves the efficiency of the identification operation, and improves the user experience.

As shown in Figure 8, the embodiment of the present invention describes the tire pressure sensor identification device through static learning, allowing the electronic control unit (ECU) to identify the identification of each tire pressure sensor, and through the tire pressure sensor identification device to determine the tire pressure The pressure and temperature of the sensor are sent to the ECU.

The specific steps are detailed as follows:

Step 801: The tire pressure sensor identification device sends a command to read the identification information of the tire pressure sensor (for example, the ID of the tire pressure sensor).

Step 802: The tire pressure sensor sends data such as tire pressure sensor ID, tire pressure, and tire temperature by radio frequency.

Step 803: The tire pressure sensor identification device and the ECU enter the learning mode through the static learning process. For example, the tire pressure sensor recognition device prompts the user to press various buttons in a certain order to let the ECU enter the learning mode.

Step 804: The tire pressure sensor identification device sends the tire pressure sensor ID previously received from the tire pressure sensor, the tire pressure and the tire temperature sensed by the tire pressure sensor to the ECU.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A tire pressure sensor identification method is characterized in that it comprises the following steps:

After the communication connection with the electronic control unit of the vehicle is established, the identity information of the tire pressure sensor corresponding to the vehicle received from the tire pressure sensor is sent to the electronic control unit through the on-board diagnostic system bus;

Receiving the response information sent by the electronic control unit that the identity information is received;

According to the response information, the identity information and the tire pressure and temperature measured by the tire pressure sensor are sent to the electronic control unit by radio frequency.
A tire pressure sensor identification device, characterized by comprising: a storage module, a communication module, a processing module, and a radio frequency transmission module; wherein the storage module, the communication module, and the radio frequency transmission module are respectively the same as the processing module Communication connection

The storage module is used to store the identity information of the tire pressure sensor, and the pressure information and temperature information of the tire measured by the tire pressure sensor;

The communication module is used to send the identification information of the tire pressure sensor to the electronic control unit of the vehicle, and receive the response information that the identification information fed back by the electronic control unit has been written into the electronic control unit;

The processing module is used to control the communication module to send the identity information of the tire pressure sensor to the electronic control unit; The radio frequency transmitting module sends the identity information and the tire pressure and temperature information measured by the tire pressure sensor to the electronic control unit;

The radio frequency transmitting module is configured to send the identity information to the electronic control unit after receiving the identity information fed back by the electronic control unit and the response information of the electronic control unit, and the The tire pressure and temperature information measured by the tire pressure sensor.
A tire pressure sensor identification method is characterized in that it comprises the following steps:

After establishing a communication connection with the electronic control unit of the vehicle, display the operation required by the user on the display screen for the user's reference during operation;

After the user executes the displayed operation, the electronic control unit enters the learning mode according to the user's operation;

After the electronic control unit enters the learning mode, the acquired identity information of the tire pressure sensor corresponding to the vehicle and the pressure and temperature of the tire measured by the tire pressure sensor are sent to the electronic control unit.
A tire pressure sensor identification device, characterized by comprising: a storage module, an interaction module, a processing module, and a radio frequency transmission module; wherein the storage module, the interaction module, and the radio frequency transmission module are respectively the same as the processing module Communication connection

The storage module is used to store the identity information of the tire pressure sensor, and the pressure information and temperature information of the tire measured by the tire pressure sensor;

The interaction module is used to interact with the user, and display the operation required by the user for the user's reference during operation;

The processing module is configured to control the electronic control unit to enter the learning mode according to the user's operation after the user performs the displayed operation;

The radio frequency transmitting module is used to obtain the identity information of the tire pressure sensor corresponding to the vehicle and the pressure and temperature of the tire from the storage module after the electronic control unit enters the learning mode, and combine the identity information and the tire pressure and temperature from the storage module. The pressure and temperature are sent to the electronic control unit.