Bluetooth tire pressure sensor learning method and device

Abstract

The invention discloses a Bluetooth tire pressure sensor learning method and device, and relates to the field of tire pressure monitoring, and the method comprises the steps: tire pressure sensors on front and rear wheels of an electric vehicle periodically broadcast common messages to the outside; the user side generates an authentication message related to the tire pressure sensor to be learned according to the broadcast signal strength of the front and rear tire pressure sensors, and transmits the authentication message to the vehicle side center controller; and the vehicle end central controller determines the position and the identity of the current tire pressure sensor to be learned based on the received authentication message, receives a common message broadcasted by the tire pressure sensor to be learned, and analyzes the common message to obtain tire pressure and tire temperature information of the corresponding wheel. According to the method, the power consumption of the tire pressure sensor can be effectively reduced, the service life is prolonged, the operation difficulty and operation time of learning pairing are effectively reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of tire pressure monitoring, and in particular to a Bluetooth tire pressure sensor learning method and device. Background Art

[0002] Existing tire pressure sensor learning and pairing are usually divided into two-way communication mode and one-way communication mode. When using broadcast scanning two-way communication mode (master-slave mode) for learning and pairing, the high power consumption leads to a reduction in the service life of the sensor, especially for built-in tire pressure sensors. If the service life is too low, the tires need to be frequently disassembled and the batteries need to be replaced, which is not conducive to maintenance. When using broadcast one-way communication (slave mode) for learning and pairing, an acceleration sensor can be used to learn and pair according to the wheel speed. The operation is relatively cumbersome, especially for the front wheels, which requires manual rotation of the tires, which is time-consuming and labor-intensive, and reduces production efficiency. In addition, when using broadcast one-way communication (slave mode) for learning and pairing, the deflation method can also be used for learning and pairing, that is, when a certain air pressure is reached, it is necessary to inflate again, which also requires manual operation, which is time-consuming and labor-intensive, and is extremely inconvenient for factory inspection, reducing production efficiency.

[0003] In addition to the three learning and pairing methods mentioned above, third-party testing tools are often used for learning and pairing. Although this simplifies the operating process to a certain extent, it adds additional testing fees, increases testing costs, and is not conducive to replacement and maintenance by stores and users. Summary of the invention

[0004] In view of the above problems and technical requirements, the inventors have proposed a Bluetooth tire pressure sensor learning method and device. The technical solution of the present invention is as follows:

[0005] In a first aspect, the present application provides a Bluetooth tire pressure sensor learning method, comprising the following steps:

[0006] The tire pressure sensors on the front and rear wheels of the electric vehicle periodically broadcast ordinary messages to the outside world;

[0007] The user end generates an authentication message related to the tire pressure sensor to be learned based on the broadcast signal strength of the front and rear tire pressure sensors, and transmits it to the vehicle-end central control;

[0008] The vehicle-side central control determines the location and identity of the tire pressure sensor to be learned based on the received authentication message, receives the common message broadcast by the tire pressure sensor to be learned, and parses it to obtain the tire pressure and temperature information of the corresponding wheel.

[0009] A further technical solution is that the user terminal generates an authentication message related to the tire pressure sensor to be learned according to the broadcast signal strength of the front and rear tire pressure sensors, including:

[0010] Move the user terminal near a wheel. When the broadcast signal strength between the user terminal and the tire pressure sensor to be learned on the wheel is greater than the set value:

[0011] The user end obtains the identity ID information of the tire pressure sensor to be learned;

[0012] The user end configures the corresponding tire pressure learning bit according to the identity ID information of the tire pressure sensor to be learned, and the tire pressure learning bit is used to identify the wheel information where the tire pressure sensor to be learned is located;

[0013] The user end combines the identity ID information and the tire pressure learning bit into an authentication message for the tire pressure sensor to be learned.

[0014] A further technical solution is that the vehicle-side central control determines the position and identity of the tire pressure sensor to be learned based on the received authentication message, including:

[0015] The vehicle-side central control receives the authentication message sent by the user end, identifies the tire pressure learning bit in the authentication message to determine the current learning front tire pressure or rear tire pressure;

[0016] The vehicle-side central control clears the previously stored front wheel or rear wheel information and updates it with the data content in the authentication message, including the identity ID information of the tire pressure sensor to be learned and the tire pressure learning position;

[0017] Among them, the tire pressure learning position is used to identify the wheel information where the tire pressure sensor to be learned is located.

[0018] Its further technical solution is that the method further comprises:

[0019] The vehicle-side central control feeds back the front and rear wheel learning status to the user-side;

[0020] The vehicle-side central control forwards the parsed tire pressure and temperature information to the vehicle instrument display.

[0021] Its further technical solution is that the method further comprises:

[0022] According to the riding and non-riding status of the vehicle, the frequency of the tire pressure sensor broadcasting ordinary messages to the outside is adjusted differently, and in the non-riding state, the tire pressure sensor enters a dormant state after a certain period of time.

[0023] A further technical solution is that the authentication message also includes:

[0024] The MAC address of the tire pressure sensor to be learned;

[0025] Authentication message ID, data length, and checksum.

[0026] A further technical solution is that the ordinary message contains:

[0027] Data length, data type, and valid values ​​corresponding to different types. Data types include tire pressure and tire temperature.

[0028] Its further technical solution is that Bluetooth communication is used between the user end, the vehicle-end central control and the tire pressure sensor.

[0029] In a second aspect, the present application also provides a Bluetooth tire pressure sensor learning device, comprising:

[0030] The tire pressure sensors located on the front and rear wheels of the electric vehicle are used to periodically broadcast ordinary messages to the outside world;

[0031] The user end is used to generate an authentication message related to the tire pressure sensor to be learned according to the broadcast signal strength of the front and rear tire pressure sensors, and transmit it to the vehicle-side central control;

[0032] The vehicle-side central control is used to determine the position and identity of the tire pressure sensor to be learned based on the received authentication message, receive the common message broadcast by the tire pressure sensor to be learned, and parse to obtain the tire pressure and temperature information of the corresponding wheel.

[0033] The beneficial technical effects of the present invention are:

[0034] This method uses the user end to replace the third-party detection tool, reducing the cost of using special tools. According to the broadcast signal strength between the user end and the front and rear tire pressure sensors, the tire pressure sensor with a stronger signal is selected as the one that needs to be learned and paired, and the tire pressure sensor identity ID information and tire pressure learning bit are composed of an authentication message and transmitted to the vehicle-side central control. The vehicle-side central control determines the priority of receiving the front and rear tire pressure information based on this authentication message. The power consumption of the tire pressure sensor in this process is low, which increases the service life of the sensor; it also effectively reduces the difficulty and time of learning and pairing, reduces the production process, and improves production efficiency. By performing sensor detection and learning pairing through the user end, not only does it get rid of the dependence on third-party detection tools, but users and manufacturers can quickly and conveniently complete the binding of tire pressure sensors, which is more convenient to use and has a high penetration rate. It is suitable for promotion stores, after-sales, and user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a Bluetooth tire pressure sensor learning device provided in this application.

[0036] Figure 2 This is a flow chart of the Bluetooth tire pressure sensor learning method provided by this application. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] In one embodiment, the present application provides a Bluetooth tire pressure sensor learning device, please refer to Figure 1As shown, the device includes: tire pressure sensors a and b located on the front and rear wheels of the electric vehicle, a user end and a vehicle-end central control, and the user end, the vehicle-end central control and the tire pressure sensor are connected by Bluetooth. Among them, the tire pressure sensor uses broadcast one-way communication (slave mode) to periodically broadcast ordinary messages to the user end and the vehicle-end central control respectively. The user end generates an authentication message related to the tire pressure sensor to be learned based on the broadcast signal strength of the front and rear tire pressure sensors, and transmits it to the vehicle-end central control. The vehicle-end central control determines the identity and position of the current tire pressure sensor to be learned based on the received authentication message, and receives the ordinary message broadcast by the tire pressure sensor to be learned based on the identity information, and parses it to obtain the tire pressure and temperature information of the corresponding wheel.

[0039] Among them, the common message includes data length Length, data type Type and valid values ​​TirePre Data corresponding to different types. The message format is shown in Table 1.

[0040] Table 1. Common message format

[0041] 1 Byte n Byte (Length-n)Byte Length Type TirePre Data

[0042] In this embodiment, the data types include tire pressure, tire temperature, acceleration, etc.

[0043] The authentication message contains the start byte START, message ID, data length Len, data content, checksum SumCHECK and end byte END, where the data content includes the identity ID information, MAC address and tire pressure learning bit of the tire pressure sensor to be learned. The message format is shown in Table 2.

[0044] Table 2. Authentication message format

[0045]

[0046] Among them, the identity ID information and MAC address of the tire pressure sensor to be learned are obtained by the user end from the corresponding tire pressure sensor; the tire pressure learning bit is configured by the user end according to the identity ID information of the tire pressure sensor to be learned, and is used to identify the wheel information where the tire pressure sensor to be learned is located; the message ID is automatically set when the user end generates an authentication message, and is used to distinguish it from other messages generated by the user end; the main function of the checksum is to ensure the integrity and accuracy of the message during transmission.

[0047] Based on the same inventive concept, in another embodiment, the present application also provides a Bluetooth tire pressure sensor learning method, which is implemented based on the above-mentioned Bluetooth tire pressure sensor learning device. Figure 2 As shown, the method specifically includes:

[0048] First, open the vehicle APP integrated on the user side (such as a smart device such as a mobile phone or watch with a Bluetooth module), establish a connection with the vehicle-side central control of the electric vehicle through the Bluetooth communication protocol, successfully scan and bind the electric vehicle, and then you can choose to enter the tire pressure learning mode in the vehicle APP. The tire pressure sensors on the front and rear wheels of the electric vehicle periodically broadcast ordinary messages to the outside. According to the broadcast signal strength of the front and rear tire pressure sensors, the user side generates an authentication message related to the tire pressure sensor to be learned, and transmits it to the vehicle-side central control. In this embodiment, the user side scans the signal strength of the front and rear tire pressure sensors respectively to determine the distance between the user side and the front and rear wheels, and determines the priority of the central control to receive the front and rear tire pressure information. Optionally, this method can adjust the frequency of the tire pressure sensor broadcasting ordinary messages to the outside periodically according to the riding and non-riding status of the vehicle, and in the non-riding state, the tire pressure sensor enters a dormant state after a certain period of time, achieving low power consumption and extending the working life of the sensor. Even when the tire pressure sensor is installed internally, it does not need to be replaced frequently.

[0049] Among them, the user end generates an authentication message related to the tire pressure sensor to be learned according to the broadcast signal strength of the front and rear tire pressure sensors, specifically including: moving the user end near a certain wheel, when the broadcast signal strength between the user end and the tire pressure sensor to be learned on the wheel is greater than the set value, the user end obtains the identity ID information of the tire pressure sensor to be learned. The user end configures the corresponding tire pressure learning bit according to the identity ID information of the tire pressure sensor to be learned, and the tire pressure learning bit is used to identify the wheel information where the tire pressure sensor to be learned is located. The user end outputs the authentication message of the tire pressure sensor to be learned by combining the identity ID information and the tire pressure learning bit.

[0050] Secondly, the vehicle-side central control determines the location and identity of the tire pressure sensor to be learned based on the received authentication message. Specifically, the vehicle-side central control receives the authentication message sent by the user end, identifies the tire pressure learning bit in the authentication message to determine the currently learned front tire pressure or rear tire pressure. The vehicle-side central control clears the previously stored front or rear wheel information, and updates it to the data content in the authentication message, and then feedbacks the front and rear wheel learning status to the user end. For example, if the update is successful, the front and rear wheel learning success instruction is fed back. If the authentication message cannot be read, the front and rear wheel learning failure instruction is fed back.

[0051] Finally, the vehicle-side central control receives the ordinary message broadcast by the tire pressure sensor to be learned with the corresponding identity according to the currently stored identity information, parses it to obtain the tire pressure and temperature information of the corresponding wheel, and forwards it to the vehicle instrument display.

[0052] In this embodiment, when learning the front wheel, when the user terminal is close to the front tire pressure sensor, the signal strength value of the front wheel will increase. If the RSSI value is greater than -10dB, the user terminal obtains the identity ID information of the front tire pressure sensor and the configuration information such as the tire pressure learning position and sends it to the central control. The central control recognizes that the tire pressure learning position sent by the user terminal is equal to the front tire pressure learning, then the currently stored front wheel information is cleared, and the identity ID information of the front tire pressure sensor and the configuration information such as the tire pressure learning position sent by the current user terminal are stored as new front wheel information. Similarly, when learning the rear wheel, when the user terminal is close to the rear tire pressure sensor, the signal strength value of the rear wheel will increase. If the RSSI value is greater than -10dB, the user terminal obtains the identity ID information of the rear tire pressure sensor and the configuration information such as the tire pressure learning position and sends it to the central control. The central control recognizes that the tire pressure learning position sent by the user terminal is equal to the rear tire pressure learning, then the currently stored rear wheel information is cleared, and the identity ID information of the rear tire pressure sensor and the configuration information such as the tire pressure learning position sent by the current mobile phone terminal are stored as new rear wheel information. After the front and rear wheels have completed learning, the central control will feedback the front and rear wheels learning success command to the user end, and the user end will display the learning success. The central control will receive the common message sent by the corresponding ID sensor based on the stored front / rear tire pressure identity information, and monitor the tire pressure and temperature of the current vehicle tire in real time.

[0053] The above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. A Bluetooth tire pressure sensor learning method, characterized in that: The method comprises: The tire pressure sensors on the front and rear wheels of the electric vehicle periodically broadcast ordinary messages to the outside world; The user end generates an authentication message related to the tire pressure sensor to be learned based on the broadcast signal strength of the front and rear tire pressure sensors, and transmits it to the vehicle-end central control; The vehicle-side central control determines the position and identity of the tire pressure sensor to be learned based on the received authentication message, receives the common message broadcast by the tire pressure sensor to be learned, and parses it to obtain the tire pressure and temperature information of the corresponding wheel.

2. The Bluetooth tire pressure sensor learning method according to claim 1, characterized in that: The user terminal generates an authentication message related to the tire pressure sensor to be learned according to the broadcast signal strength of the front and rear tire pressure sensors, including: Move the user terminal near a wheel. When the broadcast signal strength between the user terminal and the tire pressure sensor to be learned on the wheel is greater than the set value: The user terminal obtains the identity ID information of the tire pressure sensor to be learned; The user terminal configures a corresponding tire pressure learning position according to the identity ID information of the tire pressure sensor to be learned, and the tire pressure learning position is used to identify the wheel information where the tire pressure sensor to be learned is located; The user terminal combines the identity ID information and the tire pressure learning bit into an authentication message of the tire pressure sensor to be learned.

3. The Bluetooth tire pressure sensor learning method according to claim 1, characterized in that: The vehicle-side central control determines the position and identity of the tire pressure sensor to be learned based on the received authentication message, including: The vehicle-side central control receives the authentication message sent by the user end, identifies the tire pressure learning bit in the authentication message to determine the currently learned front tire pressure or rear tire pressure; The vehicle-side central control clears the previously stored front wheel or rear wheel information and updates it with the data content in the authentication message, including the identity ID information of the tire pressure sensor to be learned and the tire pressure learning position; The tire pressure learning position is used to identify the wheel information where the tire pressure sensor to be learned is located.

4. The Bluetooth tire pressure sensor learning method according to claim 1, characterized in that: The method further comprises: The vehicle-side central control feeds back the front and rear wheel learning status to the user-side; The vehicle-side central control forwards the parsed tire pressure and tire temperature information to the vehicle instrument display.

5. The Bluetooth tire pressure sensor learning method according to claim 1, characterized in that: The method further comprises: According to the riding and non-riding states of the vehicle, the frequency of the tire pressure sensor to periodically broadcast ordinary messages to the outside is adjusted differently, and in the non-riding state, the tire pressure sensor enters a dormant state after a certain period of time.

6. The Bluetooth tire pressure sensor learning method according to claim 2, characterized in that: The authentication message also includes: The MAC address of the tire pressure sensor to be learned; Authentication message ID, data length, and checksum.

7. The Bluetooth tire pressure sensor learning method according to claim 1, characterized in that: The ordinary message contains: Data length, data type, and valid values ​​corresponding to different types, where the data types include tire pressure and tire temperature.

8. The Bluetooth tire pressure sensor learning method according to claim 1, characterized in that: The user end, the vehicle-end central control and the tire pressure sensor communicate via Bluetooth.

9. A Bluetooth tire pressure sensor learning device, characterized in that: include: The tire pressure sensors located on the front and rear wheels of the electric vehicle are used to periodically broadcast ordinary messages to the outside world; The user end is used to generate an authentication message related to the tire pressure sensor to be learned according to the broadcast signal strength of the front and rear tire pressure sensors, and transmit it to the vehicle-side central control; The vehicle-side central control is used to determine the position and identity of the tire pressure sensor to be learned based on the received authentication message, receive the common message broadcast by the tire pressure sensor to be learned, and parse to obtain the tire pressure and temperature information of the corresponding wheel.

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