Tire pressure data transmission method based on Bluetooth communication

Abstract

The invention provides a tire pressure data transmission method based on Bluetooth communication, and relates to the technical field of tire pressure detection.The method comprises the steps that the motion state of a vehicle is detected through a preset axial acceleration sensor, and when it is detected that the vehicle runs, a tire pressure sensor of each tire is awakened to collect tire pressure data in real time; the tire pressure sensors have the functions of sending and receiving tire pressure data; the tire pressure sensor of each tire transmits the tire pressure data and the received tire pressure data through Bluetooth according to a preset data transmission sequence, and sequence data containing the tire pressure data and ID information of each tire is generated through merging; and transmitting the sequence data to a vehicle receiving unit through Bluetooth, and identifying the position information of each tire and the corresponding tire pressure data according to the ID information. The problems that in the prior art, a receiving unit can only receive sensor data one by one in a point-to-point mode, and only one piece of tire pressure data can be processed each time are solved; the communication distance is short, data transmission depends on a relay, and the communication efficiency is low.

Description

Technical Field

[0001] This invention relates to the field of tire pressure monitoring technology, and in particular to a tire pressure data transmission method based on Bluetooth communication. Background Technology

[0002] Tire pressure monitoring systems (TPMS) are crucial for ensuring vehicle safety. Their core function is to collect tire pressure data from each tire in real time and transmit it to a receiving unit, allowing users to monitor tire status promptly. Currently, most mainstream tire pressure data transmission solutions employ a point-to-point communication mode between the receiving unit and the tire pressure sensors. This means the receiving unit must establish an independent communication connection with each tire's sensor individually, receiving tire pressure data from each sensor sequentially. In this mode, the receiving unit must process communication requests from each sensor in a time-sharing manner, handling only one set of tire pressure data at a time. This results in long data transmission times and low communication efficiency, especially after the vehicle is started, as it requires waiting for all sensor data to be transmitted before the complete tire pressure status can be displayed, negatively impacting the user experience.

[0003] Meanwhile, the communication distance of existing tire pressure sensors is affected by factors such as vehicle type (multiple tires, extended body), making it difficult for tire sensors far from the receiving unit to establish stable communication directly. To address this issue, existing technologies typically require additional repeater equipment to forward sensor data and extend the communication distance. However, this not only increases system hardware costs and installation complexity but also carries the risk of data transmission interruptions or delays due to repeater failures or signal interference, further reducing communication reliability. Furthermore, the combination of point-to-point reception and repeater forwarding makes the data transmission process cumbersome, hindering overall communication efficiency and failing to meet the vehicle's demand for real-time and efficient tire pressure data transmission. Summary of the Invention

[0004] The embodiments of the present invention provide a tire pressure data transmission method based on Bluetooth communication, which aims to solve the problems of existing technology where the receiving unit can only receive sensor data point-to-point and process only one tire pressure data at a time; and the short communication distance, reliance on repeaters for data transmission, and low communication efficiency.

[0005] To achieve the above objectives, the present invention provides a tire pressure data transmission method based on Bluetooth communication, comprising the following steps: The vehicle's motion state is detected by a pre-set axial acceleration sensor. When the vehicle is detected to be moving, the tire pressure sensors of each tire are activated to collect tire pressure data in real time. Each tire pressure sensor has the function of sending and receiving tire pressure data. Each tire pressure sensor transmits its own and the received tire pressure data via Bluetooth according to a predetermined data transmission order, and merges them to generate a sequence of data containing each tire's tire pressure data and ID information. The sequence data is transmitted to the vehicle receiving unit via Bluetooth, and the position information of each tire and its corresponding tire pressure data are identified based on the ID information.

[0006] Furthermore, the receiving unit transmits the position information of each tire and its corresponding tire pressure data to the display unit for display via wired bus communication.

[0007] Furthermore, the ID information is obtained by pre-reading the ID values ​​of the tire pressure sensors in each tire using a handheld wireless device, recording the wheel position information corresponding to each ID value, and storing it in the receiving unit.

[0008] Furthermore, the predetermined data transmission order is determined in the following way: each tire pressure sensor automatically broadcasts its own ID information after being powered on, and the data is transmitted and merged in sequence according to the priority order based on the tire position corresponding to the ID information.

[0009] Furthermore, in the priority order, the tire pressure sensor closest to the receiving unit is ranked last.

[0010] Furthermore, when the vehicle is detected to be stationary for a period of time exceeding a preset threshold, each tire pressure sensor automatically switches to a low-power sleep mode. The sleep mode wakes up every a seconds to collect tire pressure data and temporarily stores it. When the axial acceleration sensor detects that the vehicle is restarting, it immediately wakes up and executes the sequence data merging and transmission step.

[0011] Furthermore, after receiving the sequence data, if the receiving unit detects that the tire pressure data of a certain tire exceeds the preset normal range, it will issue a pop-up notification on the vehicle's central control screen and simultaneously send the abnormal tire pressure data and the corresponding tire position information to the user's mobile phone via Bluetooth for notification.

[0012] Furthermore, the tire pressure sensor also integrates a temperature detection module, which collects internal tire temperature data and transmits it along with the tire pressure data; when the temperature data and tire pressure data reach predetermined high temperature and high pressure conditions, a first-level alarm is immediately triggered and the maximum driving speed of the vehicle is limited.

[0013] Furthermore, the receiving unit also integrates a tire pressure prediction algorithm. The tire pressure prediction algorithm inputs tire pressure data within a predetermined time period into a pre-trained LSTM model to obtain the tire pressure change trend, and combines the current tire pressure data, tire internal temperature data and / or ambient temperature data to predict tire pressure data changes in the future.

[0014] The above technical solution has the following technical effects: The vehicle's motion is detected by a pre-set axial acceleration sensor. When vehicle movement is detected, the tire pressure sensors of each tire are activated to collect tire pressure data in real time. Each tire pressure sensor has the function of sending and receiving tire pressure data. Each tire pressure sensor transmits its own and the received tire pressure data via Bluetooth according to a predetermined data transmission order, and merges them to generate a sequence of data containing the tire pressure data and ID information of each tire. The sequence of data is transmitted to the vehicle receiving unit via Bluetooth, and the position information of each tire and its corresponding tire pressure data are identified according to the ID information. This invention solves the problems of existing technologies where the receiving unit can only receive sensor data point-to-point and process only one tire pressure data at a time; and the short communication distance, reliance on repeaters for data transmission, and low communication efficiency.

[0015] In summary, this invention endows all tire pressure sensors with bidirectional communication capabilities, replacing the traditional point-to-point, one-by-one receiving mode of receiving units. Through a data relay merging mechanism, each sensor transmits its own data and the data received from other sensors in a predetermined order, integrating scattered individual tire pressure data into a sequence of data containing all tire pressure data and corresponding ID information. This enables centralized transmission and one-time processing of multiple sets of data, solving the problem of only being able to process one data point at a time. Furthermore, by utilizing Bluetooth relay transmission between sensors, the communication coverage can be extended without additional repeaters, solving the problem of limited communication distance in traditional solutions; at the same time, the integration of sequence data reduces the frequency of transmission interactions, systematically improving the efficiency of tire pressure data transmission. Attached Figure Description

[0016] Figure 1 This is a schematic flowchart of a tire pressure data transmission method based on Bluetooth communication according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the installation position of a tire pressure sensor according to an embodiment of the present invention. Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figures 1-2 As shown, an embodiment of the tire pressure data transmission method based on Bluetooth communication according to the present invention includes the following steps: The vehicle's motion is detected by a pre-installed axial acceleration sensor. When vehicle movement is detected, the tire pressure sensors of each tire are activated to collect tire pressure data in real time. Each tire pressure sensor has the function of sending and receiving tire pressure data. Since each tire pressure sensor can simultaneously receive and send data, when a single tire pressure sensor receives other Bluetooth information, it will also include its own information (ID and tire pressure) in the information queue that the sensor is about to send. In this relay-like manner, unlimited transmission distance and an unlimited number of tire pressure sensors can be achieved without the need for repeaters; it is applicable to vehicles with all numbers of wheels.

[0020] In one specific implementation, when the vehicle is detected to be stationary for a period of time exceeding a preset threshold, each tire pressure sensor automatically switches to a low-power sleep mode. The sleep mode is woken up every a second, such as 30 to 60 seconds, to collect tire pressure data and temporarily store it. When the axial acceleration sensor detects that the vehicle is restarting, it is immediately woken up and the sequence data merging and transmission step is executed.

[0021] Each tire pressure sensor transmits its own and the received tire pressure data via Bluetooth protocol BLE 5.1 ​​or higher according to a predetermined data transmission order, and merges them to generate a sequence of data containing each tire's tire pressure data and ID information. In one specific implementation, the information sent by a certain tire is expressed as: Tire information (Tire ID / Tire pressure) + Tire A information (Tire A ID / Tire pressure) + Tire B information (Tire B ID / Tire pressure) + ... + Tire N information (Tire N ID / Tire pressure).

[0022] The sequence data is transmitted to the vehicle receiving unit via Bluetooth, and the position information of each tire and its corresponding tire pressure data are identified based on the ID information.

[0023] In one specific implementation, the receiving unit transmits the position information of each tire and its corresponding tire pressure data to the display unit for display via wired bus communication.

[0024] In one specific implementation, the ID information is pre-read by a handheld wireless device using the ID values ​​of the tire pressure sensors in each tire, and the wheel position information corresponding to each ID value, such as left front, right front, left center, right center, left rear, right rear, etc., is recorded and stored in the receiving unit.

[0025] In one specific implementation, the predetermined data transmission order is determined as follows: each tire pressure sensor automatically broadcasts its own ID information after being powered on, and the data is transmitted and merged in sequence according to the priority order based on the tire position corresponding to the ID information.

[0026] In this embodiment, determining the predetermined data transmission order provides orderly support for the relay merging of multi-sensor data, ensuring efficient generation of sequence data. Each tire pressure sensor is pre-programmed with unique ID information at the factory, and the ID is bound to the preset tire position through a fixed coding rule, forming a one-to-one mapping relationship, laying the foundation for subsequent position identification and sorting. When the sensor is powered on, it automatically enters Bluetooth broadcast mode, periodically sending broadcast data packets containing its own unique ID and position identifier fields at a fixed frequency, while simultaneously receiving broadcast information from other surrounding sensors in real time, completing the self-organizing network topology construction. After the broadcast is completed, the system parses the tire position corresponding to each sensor based on the ID information, and then divides the priority according to preset rules to determine the order of data transmission. After sorting, the sensor with the highest priority initiates data transmission first, passing its collected tire pressure data to the next priority sensor; subsequent sensors receive the preceding data, merge it with their own collected data, and then pass it down according to priority until all sensor data is integrated, finally generating sequence data containing all tire pressure data and corresponding ID information. This design enables sensor self-identification and self-organizing networking through ID broadcasting, avoiding the inefficiency of manual pairing or one-by-one scheduling of receiving units. At the same time, it ensures the orderly transmission of data by using location-associated priority sorting, preventing data transmission conflicts between multiple sensors.

[0027] In one specific implementation, the tire pressure sensor that is closest to the receiving unit is ranked last in terms of priority.

[0028] Specifically, the system obtains the relative distance between each tire pressure sensor and the vehicle's receiving unit through signal interaction between sensors or reference signal detection by the receiving unit, and establishes a distance mapping table. Based on this mapping table, the tire pressure sensor closest to the receiving unit is set as the last in priority ranking, and the remaining sensors are ranked according to signal stability or tire function importance, forming a transmission order in which far-distance sensors prioritize transmission and near-distance sensors complete the final integration. During the data transmission phase, the higher-priority far-distance sensors first transmit their collected tire pressure data to the next higher-priority sensor. Subsequent sensors receive the preceding data in sequence and merge it with their own data. Finally, the sensor closest to the receiving unit completes the full data integration and transmits it directly to the receiving unit. This near-distance final integration priority strategy solves the signal attenuation and delay problems that occur when far-distance sensors transmit directly, shortening the final data transmission path.

[0029] In one specific implementation, after receiving the sequence data, if the receiving unit detects that the tire pressure data of a certain tire exceeds the preset normal range, it will display a pop-up notification on the vehicle's central control screen and simultaneously send the abnormal tire pressure data and the corresponding tire position information to the user's mobile phone via Bluetooth for notification.

[0030] In one specific implementation, the tire pressure sensor also integrates a temperature detection module, which collects internal tire temperature data and transmits it along with the tire pressure data; when the temperature data and tire pressure data reach predetermined high temperature and high pressure conditions, a first-level alarm is immediately triggered and the maximum driving speed of the vehicle is limited.

[0031] In this embodiment, the tire pressure sensor integrates a temperature detection module to achieve synchronous acquisition and collaborative analysis of tire pressure and tire internal temperature data, enhancing driving safety. The temperature detection module captures changes in tire internal temperature in real time, associating and binding the collected temperature data with the tire pressure data collected by the tire pressure sensor. Both are encapsulated in a unified data format and transmitted via Bluetooth to the vehicle receiving unit along with the sequence data. The system has preset, clearly defined high-temperature and high-pressure judgment thresholds, such as temperature ≥75℃ and tire pressure ≥2.8 bar, which can be adjusted according to vehicle model. After receiving the data, the receiving unit synchronously verifies whether the temperature and tire pressure parameters simultaneously meet the threshold conditions. Once the preset conditions are triggered, the system immediately activates a dual safety mechanism: on the one hand, it initiates a level one alarm through the vehicle's central control screen, instrument panel pop-up window, and audible and visual signals, intuitively alerting the user that the tire is in a high-risk state; on the other hand, the receiving unit sends a speed limit command to the vehicle control system, limiting the vehicle's maximum speed according to preset rules, such as reducing it to below 60 km / h, forcibly reducing tire load and avoiding the risk of tire blowout caused by high temperature and high pressure.

[0032] In one specific implementation, the receiving unit also integrates a tire pressure prediction algorithm. The tire pressure prediction algorithm inputs tire pressure data within a predetermined time period into a pre-trained LSTM model to obtain the tire pressure change trend, and combines the current tire pressure data, tire internal temperature data and / or ambient temperature data to predict tire pressure data changes in the future.

[0033] In this embodiment, the receiving unit integrates a tire pressure prediction algorithm. The core of the algorithm relies on a pre-trained LSTM (Long Short-Term Memory) model, which has been trained and optimized using a large amount of historical tire pressure data under various operating conditions and environments, enabling it to capture the temporal variation patterns of tire pressure. The receiving unit first extracts continuous tire pressure data (including corresponding collection timestamps and tire internal temperature data) within a predetermined time period, such as the past 72 hours. In some scenarios, ambient temperature data is also included as a supplementary feature. This multi-dimensional data is then processed according to a preset format and input into the LSTM model. By learning the correlation between tire pressure, temperature, and time, the model outputs a tire pressure change trend curve. Simultaneously, it combines the current real-time tire pressure value and real-time temperature sensing data to predict the dynamic changes in tire pressure at a specific time in the future, such as within the next 12 hours, including key information such as the predicted value range and rate of change. Through time-series data modeling and multi-dimensional feature fusion, the system can predict situations such as gradual tire pressure leakage and abnormal tire pressure caused by ambient temperature, allowing users sufficient time for adjustment or maintenance, further enhancing the practicality and safety warning value of the tire pressure monitoring system.

[0034] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A method for transmitting tire pressure data based on Bluetooth communication, characterized in that, Includes the following steps: The vehicle's motion state is detected by a pre-set axial acceleration sensor. When the vehicle is detected to be moving, the tire pressure sensors of each tire are activated to collect tire pressure data in real time. Each tire pressure sensor has the function of sending and receiving tire pressure data. Each tire pressure sensor transmits its own and the received tire pressure data via Bluetooth according to a predetermined data transmission order, and merges them to generate a sequence of data containing each tire's tire pressure data and ID information. The sequence data is transmitted to the vehicle receiving unit via Bluetooth, and the position information of each tire and its corresponding tire pressure data are identified based on the ID information.

2. The tire pressure data transmission method based on Bluetooth communication according to claim 1, characterized in that, The receiving unit transmits the position information of each tire and its corresponding tire pressure data to the display unit for display via wired bus communication.

3. The tire pressure data transmission method based on Bluetooth communication according to claim 1, characterized in that, The ID information is obtained by pre-reading the ID values ​​of the tire pressure sensors in each tire using a handheld wireless device, recording the wheel position information corresponding to each ID value, and storing it in the receiving unit.

4. The tire pressure data transmission method based on Bluetooth communication according to claim 1, characterized in that, The predetermined data transmission order is determined as follows: each tire pressure sensor automatically broadcasts its own ID information after being powered on, and the data is transmitted and merged in sequence according to the priority order based on the tire position corresponding to the ID information.

5. The tire pressure data transmission method based on Bluetooth communication according to claim 4, characterized in that, The priority order is such that the tire pressure sensor closest to the receiving unit is ranked last.

6. The tire pressure data transmission method based on Bluetooth communication according to claim 1, characterized in that, When the vehicle is detected to be stationary for a period of time exceeding a preset threshold, each tire pressure sensor automatically switches to a low-power sleep mode. The sleep mode wakes up every a seconds to collect tire pressure data and temporarily stores it. When the axial acceleration sensor detects that the vehicle is restarting, it immediately wakes up and executes the sequence data merging and transmission step.

7. The tire pressure data transmission method based on Bluetooth communication according to claim 1, characterized in that, After receiving the sequence data, if the receiving unit detects that the tire pressure data of a certain tire exceeds the preset normal range, it will issue a pop-up notification on the vehicle's central control screen and simultaneously send the abnormal tire pressure data and the corresponding tire position information to the user's mobile phone via Bluetooth.

8. The tire pressure data transmission method based on Bluetooth communication according to claim 1, characterized in that, The tire pressure sensor also integrates a temperature detection module, which collects internal tire temperature data and transmits it along with the tire pressure data. When the temperature data and tire pressure data reach the predetermined high temperature and high pressure conditions, a first-level alarm is immediately triggered and the maximum driving speed of the vehicle is limited.

9. The tire pressure data transmission method based on Bluetooth communication according to claim 8, characterized in that, The receiving unit also integrates a tire pressure prediction algorithm. The tire pressure prediction algorithm inputs tire pressure data within a predetermined time period into a pre-trained LSTM model to obtain the tire pressure change trend, and combines the current tire pressure data, tire internal temperature data and / or ambient temperature data to predict tire pressure data changes in the future.

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