Tire pressure monitoring and early warning method, system and device after vehicle power-off and storage medium

Abstract

The invention discloses a tire pressure monitoring and early warning method, system and device after vehicle power-off and a storage medium, and the method comprises the steps: obtaining TPMS data, determining the current tire pressure and current temperature of a target tire, and continuously recording a tire pressure change curve and a temperature change curve; when the current tire pressure is lower than the tire pressure threshold value, and / or the current temperature is lower than the temperature threshold value, the vehicle control unit is awakened, so that the vehicle control unit enters a dormancy state after sending TPMS early warning information to the user terminal; inputting the tire pressure change curve and the temperature change curve into a tire air leakage identification model to obtain an air leakage identification result of the target tire; when the target tire leaks air, the vehicle control unit is awakened again, so that the vehicle control unit sends a tire air leakage alarm to the user terminal; and when the target tire does not leak air, sending the tire pressure change curve and the temperature change curve to a user terminal through the vehicle control unit after the vehicle control unit is actively awakened by a user. The electric energy consumption of tire pressure monitoring and early warning after the vehicle is powered off is reduced, and the method can be applied to the technical field of vehicle monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle monitoring, and in particular to a method, system, device and storage medium for tire pressure monitoring and warning after a vehicle is powered off. Background Art

[0002] As an important part of an automobile, the main factor considered for tire performance is tire pressure. Too low or too high tire pressure will affect the service performance of the tire and reduce its service life, ultimately affecting driving safety. The role of TPMS (Tire Pressure Monitoring System) is to automatically monitor the tire pressure in real time during vehicle driving, and alarm for tire leakage and low pressure to ensure driving safety.

[0003] The direct TPMS tire pressure monitoring system directly replaces the original vehicle valve with a valve with a sensor, and uses the induction chip in the sensor to sense the slight changes in tire pressure and temperature in both static and moving states, converts the electrical signal into a radio frequency signal, and uses an independent channel transmitter to transmit it into the receiver, so that the vehicle owner can know the tire pressure and temperature of the vehicle body tires whether driving or in a stationary state.

[0004] However, the existing tire pressure monitoring and warning solution after the vehicle is powered off is to send a warning signal to wake up the vehicle network every time an abnormal tire pressure is detected, resulting in excessive power consumption of the vehicle and affecting the vehicle's endurance. Summary of the Invention

[0005] An object of the present invention is to solve at least to some extent one of the technical problems existing in the prior art.

[0006] To this end, an object of an embodiment of the present invention is to provide a method for tire pressure monitoring and warning after a vehicle is powered off, which reduces the power consumption of tire pressure monitoring and warning after the vehicle is powered off and improves the endurance of the vehicle.

[0007] Another object of an embodiment of the present invention is to provide a tire pressure monitoring and warning system after a vehicle is powered off.

[0008] To achieve the above technical objectives, the technical solutions adopted in the embodiments of the present invention include:

[0009] In a first aspect, an embodiment of the present invention provides a method for tire pressure monitoring and warning after a vehicle is powered off, including the following steps:

[0010] Obtain TPMS data sent by a tire pressure monitoring module, determine the current tire pressure and current temperature of a target tire according to the TPMS data, and continuously record the tire pressure change curve and temperature change curve of the target tire;

[0011] When the current tire pressure is lower than the preset tire pressure threshold, and / or the current temperature is lower than the preset temperature threshold, wake up the vehicle controller, so that after the vehicle controller sends a TPMS warning message to the user terminal, it enters the sleep state;

[0012] Input the tire pressure change curve and the temperature change curve into a pre-trained tire leakage identification model to obtain the leakage identification result of the target tire;

[0013] When the target tire leaks, wake up the vehicle controller again, so that the vehicle controller sends a tire leakage alarm to the user terminal;

[0014] When the target tire does not leak, after the vehicle controller is actively awakened by the user, the vehicle controller sends the tire pressure change curve and the temperature change curve to the user terminal.

[0015] Further, in an embodiment of the present invention, the obtaining the TPMS data sent by the tire pressure monitoring module and determining the current tire pressure and the current temperature of the target tire according to the TPMS data specifically includes:

[0016] Receive the TPMS data through a radio frequency receiving module and parse the TPMS data to obtain the device ID, the tire pressure field, and the temperature field;

[0017] Determine the corresponding target tire according to the device ID, and determine the current tire pressure and the current temperature of the target tire according to the tire pressure field and the temperature field.

[0018] Further, in an embodiment of the present invention, the when the current tire pressure is lower than the preset tire pressure threshold, and / or the current temperature is lower than the preset temperature threshold, wake up the vehicle controller, so that after the vehicle controller sends a TPMS warning message to the user terminal, it enters the sleep state, specifically includes:

[0019] When the current tire pressure is lower than the tire pressure threshold and the current temperature is not lower than the temperature threshold, generate a TPMS warning message about too low tire pressure;

[0020] When the current tire pressure is not lower than the tire pressure threshold and the current temperature is lower than the temperature threshold, generate a TPMS warning message about too low temperature;

[0021] When the current tire pressure is lower than the tire pressure threshold and the current temperature is lower than the temperature threshold, generate a TPMS warning message about too low tire pressure and temperature;

[0022] Wake up the vehicle controller, so that the vehicle controller sends the TPMS warning information to the user terminal and enters the sleep state after a first preset duration.

[0023] Further, in an embodiment of the present invention, the tire air leakage identification model is trained through the following steps:

[0024] Obtain the tire pressure change sample data and temperature change sample data of multiple test tires, and determine the corresponding tire status labels through manual annotation;

[0025] Input the tire pressure change sample data and the temperature change sample data into a pre-constructed long short-term memory network to obtain an air leakage prediction result;

[0026] Determine the loss value according to the air leakage prediction result and the tire status label;

[0027] Update the parameters of the long short-term memory network according to the loss value to obtain the tire air leakage identification model;

[0028] Among them, the tire status labels include normal, mild air leakage, moderate air leakage, and severe air leakage.

[0029] Further, in an embodiment of the present invention, when the target tire has an air leakage, wake up the vehicle controller again, so that the vehicle controller sends a tire air leakage alarm to the user terminal, which specifically includes:

[0030] When the target tire has an air leakage, determine the severity of the air leakage according to the air leakage identification result and generate a tire air leakage alarm of the corresponding level;

[0031] Wake up the vehicle controller again, and send the tire air leakage alarm, the tire pressure change curve, and the temperature change curve to the user terminal through the vehicle controller.

[0032] Further, in an embodiment of the present invention, when the target tire does not have an air leakage, after the vehicle controller is actively awakened by the user, the vehicle controller sends the tire pressure change curve and the temperature change curve to the user terminal, which specifically includes:

[0033] When the target tire does not have an air leakage, continue to record the tire pressure change curve and the temperature change curve of the target tire, and return to the step of inputting the tire pressure change curve and the temperature change curve into the pre-trained tire air leakage identification model until it is recognized that the target tire has an air leakage or the vehicle controller is actively awakened by the user;

[0034] When the vehicle controller is actively awakened by the user, the updated current tire pressure and the current temperature are obtained, and the tire pressure change curve, the temperature change curve, and the updated current tire pressure and the current temperature are sent to the user terminal through the vehicle controller.

[0035] Further, in an embodiment of the present invention, if the RF receiving module does not receive the TPMS data within a second preset time period, it enters the low power consumption mode until the TPMS data is sensed again.

[0036] In a second aspect, an embodiment of the present invention provides a tire pressure monitoring and warning system after the vehicle is powered off, including:

[0037] An RF receiving module, configured to obtain TPMS data sent by a tire pressure monitoring module, determine the current tire pressure and the current temperature of a target tire according to the TPMS data, and continuously record the tire pressure change curve and the temperature change curve of the target tire;

[0038] A TPMS warning module, configured to wake up the vehicle controller when the current tire pressure is lower than a preset tire pressure threshold and / or the current temperature is lower than a preset temperature threshold, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state;

[0039] A leak identification module, configured to input the tire pressure change curve and the temperature change curve into a pre-trained tire leak identification model to obtain a leak identification result of the target tire;

[0040] A leak alarm module, configured to wake up the vehicle controller again when the target tire has a leak, so that the vehicle controller sends a tire leak alarm to the user terminal;

[0041] A data sending module, configured to send the tire pressure change curve and the temperature change curve to the user terminal through the vehicle controller after the vehicle controller is actively awakened by the user when the target tire does not have a leak.

[0042] In a third aspect, an embodiment of the present invention provides a tire pressure monitoring and warning device after the vehicle is powered off, including:

[0043] At least one processor;

[0044] At least one memory, configured to store at least one program;

[0045] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned method for monitoring and warning tire pressure after the vehicle is powered off.

[0046] Fourthly, an embodiment of the present invention further provides a computer-readable storage medium, which stores a program executable by a processor. The program executable by the processor is used to execute the above-mentioned method for tire pressure monitoring and warning after vehicle power-off when executed by the processor.

[0047] The advantages and beneficial effects of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention:

[0048] The embodiment of the present invention obtains TPMS data sent by a tire pressure monitoring module, determines the current tire pressure and current temperature of a target tire according to the TPMS data, and continuously records the tire pressure change curve and temperature change curve of the target tire. When the current tire pressure is lower than a preset tire pressure threshold, and / or, the current temperature is lower than a preset temperature threshold, the vehicle controller is awakened, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state. After triggering the TPMS warning, the continuously recorded tire pressure change curve and temperature change curve are regularly input into a pre-trained tire leakage identification model to obtain the leakage identification result of the target tire. When the target tire leaks, the vehicle controller is awakened again, so that the vehicle controller sends a tire leakage alarm to the user terminal. When the target tire does not leak, after the vehicle controller is actively awakened by the user, the tire pressure change curve and temperature change curve are sent to the user terminal through the vehicle controller. The embodiment of the present invention determines whether to awaken the vehicle controller and trigger the TPMS warning according to the current tire pressure and current temperature of the target tire. After triggering the TPMS warning, the vehicle controller enters the sleep state, and no new TPMS warning is triggered for the target tire. And continuously identify whether the target tire leaks according to the tire pressure change curve and temperature change curve. If the target tire leaks, the vehicle controller is awakened again to send a tire leakage alarm. If the target tire has not leaked all the time, the vehicle controller is not automatically awakened, and the tire pressure data and temperature data during this period are sent to the user terminal until the user actively awakens the vehicle controller. In this way, when only the tire pressure and / or temperature of the target tire is abnormal, the vehicle controller is awakened only once and the TPMS warning is triggered only once. When the target tire leaks, the vehicle controller is awakened only twice and the TPMS warning and a tire leakage alarm are triggered only once, avoiding repeatedly awakening the vehicle controller due to abnormal tire pressure monitoring after vehicle power-off, reducing the power consumption of tire pressure monitoring and warning after vehicle power-off, and improving the endurance of the vehicle. Description of the Drawings

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following introduces the accompanying drawings required in the embodiments of the present invention. It should be understood that the accompanying drawings in the following introduction are only for conveniently and clearly presenting some embodiments of the technical solutions in the present invention. For those skilled in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0050] Figure 1 It is a step flow chart of a tire pressure monitoring and warning method after a vehicle is powered off provided by an embodiment of the present invention;

[0051] Figure 2 It is a structural block diagram of a tire pressure monitoring and warning system after a vehicle is powered off provided by an embodiment of the present invention;

[0052] Figure 3 It is a structural block diagram of a tire pressure monitoring and warning device after a vehicle is powered off provided by an embodiment of the present invention. Detailed Embodiments

[0053] The following details the embodiments of the present invention. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention. For the step numbers in the following embodiments, they are only set for the convenience of elaboration and explanation, and no limitation is imposed on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0054] In the description of the present invention, the meaning of "a plurality" is two or more. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features. In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention.

[0055] Refer to Figure 1 , an embodiment of the present invention provides a tire pressure monitoring and warning method after a vehicle is powered off, which specifically includes the following steps:

[0056] S101. Obtain the TPMS data sent by the tire pressure monitoring module, determine the current tire pressure and current temperature of the target tire according to the TPMS data, and continuously record the tire pressure change curve and temperature change curve of the target tire;

[0057] S102. When the current tire pressure is lower than the preset tire pressure threshold and / or the current temperature is lower than the preset temperature threshold, wake up the vehicle controller, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state;

[0058] S103. Input the tire pressure change curve and the temperature change curve into a pre-trained tire leak identification model to obtain the leak identification result of the target tire;

[0059] S104. When a leak occurs in the target tire, wake up the vehicle controller again, so that the vehicle controller sends a tire leak alarm to the user terminal;

[0060] S105. When no leak occurs in the target tire, after the vehicle controller is actively awakened by the user, send the tire pressure change curve and the temperature change curve to the user terminal through the vehicle controller.

[0061] Specifically, in the embodiment of the present invention, it is determined whether to wake up the vehicle controller and trigger a TPMS warning according to the current tire pressure and the current temperature of the target tire. After triggering the TPMS warning, the vehicle controller enters the sleep state, and no new TPMS warning is triggered for the target tire. And it continuously identifies whether a leak occurs in the target tire according to the tire pressure change curve and the temperature change curve. If a leak occurs in the target tire, wake up the vehicle controller again to send a tire leak alarm. If no leak has occurred in the target tire, the vehicle controller is not automatically awakened, and the tire pressure data and temperature data during this period are sent to the user terminal after the user actively wakes up the vehicle controller. In this way, when only the tire pressure and / or temperature of the target tire is abnormal, the vehicle controller is only awakened once and a TPMS warning is triggered once. When a tire leak occurs in the target tire, the vehicle controller is only awakened twice and a TPMS warning and a tire leak alarm are triggered once, avoiding repeated awakening of the vehicle controller due to abnormal tire pressure monitoring after the vehicle is powered off, reducing the power consumption of tire pressure monitoring and warning after the vehicle is powered off, and improving the endurance of the vehicle.

[0062] It should be noted that most vehicles have four tires, and tire pressure monitoring needs to be carried out separately for each tire. The method for tire pressure monitoring and warning after the vehicle is powered off in the embodiment of the present invention is that for the same abnormal situation of a single tire, the TPMS warning is not triggered repeatedly. If the TPMS warning of tire A is triggered and then tire B also has an abnormality, the TPMS warning for tire B and the subsequent tire leak identification process will still be triggered.

[0063] Further as an optional implementation manner, obtain the TPMS data sent by the tire pressure monitoring module, and determine the current tire pressure and the current temperature of the target tire according to the TPMS data. The specific steps include:

[0064] S1011. Receive TPMS data through the RF receiving module, and parse the TPMS data to obtain the device ID, tire pressure field, and temperature field.

[0065] S1012. Determine the corresponding target tire according to the device ID, and determine the current tire pressure and current temperature of the target tire according to the tire pressure field and temperature field.

[0066] Specifically, in the embodiments of the present invention, an RF chip (such as nRF905, CC1100, SX1278, etc.) that supports the TPMS working frequency band (such as 433 MHz / 315 MHz) is selected to receive the TPMS data sent by the tire pressure monitoring module, and an embedded MCU (such as the STM8L / STM32 series) is used to implement the data parsing logic. The specific process is as follows:

[0067] 1) RF module initialization

[0068] Configure RF parameters: set the center frequency (such as 433.92 MHz), modulation method (FSK), data rate (such as 10 kbps), and receive bandwidth (matching the TPMS transmitter parameters).

[0069] Enable the low-power mode: control the module to sleep and wake up through the TRX_CE / PWR pin to reduce the system power consumption.

[0070] 2) Signal capture and demodulation

[0071] The RF front end amplifies the weak signal through the LNA (low-noise amplifier) and down-converts it to the baseband through the mixer.

[0072] Use Manchester decoding or NRZ encoding to restore the digital signal and filter out the noise interference.

[0073] 3) Packet reception

[0074] Detect the preamble (such as a 12-byte 0xAA / 0x55 sequence) to achieve frame synchronization.

[0075] Receive the complete data frame (typical structure: preamble + device ID + tire pressure + temperature + CRC).

[0076] 4) Protocol parsing: Extract the fields according to the TPMS protocol (such as ISO 21750 or the manufacturer's private protocol).

[0077] 5) CRC check: Use the CRC-16 check algorithm to verify the data integrity and discard the packets with failed checks.

[0078] 6) Device ID matching

[0079] Pre-store the mapping table of the device ID and the tire position (such as left front wheel = 0x01) in the EEPROM;

[0080] Query the received device ID to determine the target tire position (e.g., ID = 0xA1B2C3D4 corresponds to the right rear wheel).

[0081] 7) Physical quantity conversion

[0082] Tire pressure: Convert the original byte value (0 - 255) proportionally to the actual kPa value (e.g., 0 corresponds to 0 kPa, 255 corresponds to 350 kPa).

[0083] Temperature: Convert through a look-up table method or a linear formula (e.g., the original value = 0x4B corresponds to 75 °C).

[0084] Furthermore, as an optional implementation, when the current tire pressure is lower than the preset tire pressure threshold, and / or, the current temperature is lower than the preset temperature threshold, wake up the vehicle controller, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state. Specifically, it includes:

[0085] S1021. When the current tire pressure is lower than the tire pressure threshold and the current temperature is not lower than the temperature threshold, generate a TPMS warning message about low tire pressure;

[0086] S1022. When the current tire pressure is not lower than the tire pressure threshold and the current temperature is lower than the temperature threshold, generate a TPMS warning message about low temperature;

[0087] S1023. When the current tire pressure is lower than the tire pressure threshold and the current temperature is lower than the temperature threshold, generate a TPMS warning message about low tire pressure and low temperature;

[0088] S1024. Wake up the vehicle controller, so that the vehicle controller sends a TPMS warning message to the user terminal and enters the sleep state after a first preset duration.

[0089] Specifically, the warning judgment logic of the embodiments of the present invention is as follows:

[0090] if the current tire pressure < the tire pressure threshold and the current temperature >= the temperature threshold:

[0091] Generate a "low tire pressure warning" (e.g., tire pressure 180 kPa, temperature 5 °C);

[0092] elif the current tire pressure >= the tire pressure threshold and the current temperature < the temperature threshold:

[0093] Generate a "low temperature warning" (e.g., tire pressure 210 kPa, temperature -15 °C);

[0094] elif the current tire pressure < the tire pressure threshold and the current temperature < the temperature threshold:

[0095] Generate "dual low warning for tire pressure & temperature" (e.g., tire pressure 190 kPa, temperature -5 °C);

[0096] else:

[0097] Maintain the sleep state.

[0098] When generating TPMS warning information, wake up the vehicle control unit VCU that is in the sleep state after the vehicle is powered off, and generate structured warning information (including timestamp, tire position, specific value) through the VCU, and then send it to the user terminal (SMS / APP notification) through the TBOX; at the same time, start a timer with a first preset duration (such as 3 minutes). If the user does not operate and no tire leakage is detected within the first preset duration, the VCU turns off non-essential peripherals and enters the sleep mode (power consumption ≤ 0.3 μA).

[0099] Further as an optional implementation manner, the tire leakage identification model is trained through the following steps:

[0100] S201. Obtain the tire pressure change sample data and temperature change sample data of multiple test tires, and determine the corresponding tire state labels through manual annotation;

[0101] S202. Input the tire pressure change sample data and temperature change sample data into a pre-constructed long short-term memory network to obtain the leakage prediction result;

[0102] S203. Determine the loss value according to the leakage prediction result and the tire state label;

[0103] S204. Update the parameters of the long short-term memory network according to the loss value to obtain the tire leakage identification model;

[0104] Among them, the tire state labels include normal, mild leakage, moderate leakage, and severe leakage.

[0105] Specifically, the training process of the tire leakage identification model in the embodiment of the present invention is as follows:

[0106] 1. Data collection and annotation

[0107] 1) Multi-dimensional data acquisition: Collect the real-time tire pressure (kPa) and temperature (°C) data of the test tires through the TPMS system, and the sampling frequency is recommended to be 1 Hz; it is necessary to cover a variety of scenarios, including high-speed / low-speed driving, cold start / hot tire state, different climate conditions, etc., to ensure data diversity.

[0108] 2) Manual annotation rules (as shown in Table 1 below)

[0109]

[0110] Table 1

[0111] 3) Data preprocessing

[0112] Temperature compensation: Based on the ideal gas law, the tire pressure data is uniformly compensated to the equivalent value at 25°C to eliminate temperature interference;

[0113] Sliding window filtering: Use 3 - 5 point sliding mean filtering to eliminate noise;

[0114] Outlier rejection: Fluctuations exceeding the threshold for 3 consecutive times are regarded as abnormal and rejected.

[0115] 2. Model construction

[0116] Construct a long short - term memory network (LSTM) and determine its forget gate, input gate, output gate, and cell state parameters; Design a loss function based on weighted cross - entropy loss.

[0117] 3. Model training and optimization

[0118] 1) Training strategy

[0119] Data partitioning: Divide the training set / validation set / test set in the ratio of 7:2:1;

[0120] Early stopping mechanism: Terminate the training if the loss of the validation set does not decrease for 10 consecutive epochs;

[0121] Optimizer: Use the Adam optimizer with an initial learning rate of 0.001.

[0122] 2) Performance improvement measures

[0123] Data augmentation: Add ±5 kPa Gaussian noise to mildly leaking air samples;

[0124] Transfer learning: Use a publicly available tire pressure dataset (such as TPMS - ADAS5) for the pre - trained model;

[0125] Attention mechanism: Add an Attention layer after the LSTM layer to focus on key time periods.

[0126] Input the tire pressure change sample data and temperature change sample data into the long short - term memory network to obtain the air leakage prediction result. Determine the loss value based on the air leakage prediction result and the tire state label, and update the parameters of the long short - term memory network according to the loss value until the preset convergence condition is reached, then the trained tire air leakage recognition model can be obtained.

[0127] In an embodiment of the present invention, after the vehicle control unit sends a TPMS warning message to the user terminal, it indicates that a tire pressure monitoring anomaly has occurred in the target tire. At this time, the judgment of the tire pressure threshold and the temperature threshold is no longer continued. Instead, the tire pressure change curve and the temperature change curve are input into a pre-trained tire air leakage identification model, so as to continuously identify the air leakage of the target tire and obtain the current air leakage identification result.

[0128] Further as an optional implementation manner, when air leakage occurs in the target tire, the vehicle control unit is woken up again, so that the vehicle control unit sends a tire air leakage alarm to the user terminal, which specifically includes:

[0129] S1041. When air leakage occurs in the target tire, determine the severity of the air leakage according to the air leakage identification result, and generate a tire air leakage alarm corresponding to the level;

[0130] S1042. Wake up the vehicle control unit again, and send the tire air leakage alarm, the tire pressure change curve and the temperature change curve to the user terminal through the vehicle control unit.

[0131] Specifically, when it is recognized that air leakage occurs in the target tire, determine the severity of the air leakage according to the label corresponding to the air leakage identification result (slight air leakage, moderate air leakage, and severe air leakage), so as to generate a tire air leakage alarm corresponding to the level (slight, ordinary, and severe); after generating the tire air leakage alarm, wake up the vehicle control unit again, and send the tire air leakage alarm, the tire pressure change curve and the temperature change curve continuously recorded during this period to the user terminal through the vehicle control unit, for the user to view remotely.

[0132] Further as an optional implementation manner, when no air leakage occurs in the target tire, after the vehicle control unit is actively woken up by the user, the tire pressure change curve and the temperature change curve are sent to the user terminal through the vehicle control unit, which specifically includes:

[0133] S1051. When no air leakage occurs in the target tire, continue to record the tire pressure change curve and the temperature change curve of the target tire, and return to the step of inputting the tire pressure change curve and the temperature change curve into the pre-trained tire air leakage identification model until it is recognized that air leakage occurs in the target tire or the vehicle control unit is actively woken up by the user;

[0134] S1052. When the vehicle control unit is actively woken up by the user, obtain the updated current tire pressure and the current temperature, and send the tire pressure change curve, the temperature change curve, and the updated current tire pressure and the current temperature to the user terminal through the vehicle control unit.

[0135] Specifically, when it is recognized that the target tire has not leaked air, continue to obtain TPMS data and continuously record the tire pressure change curve and temperature change curve of the target tire. And every time a predetermined time interval passes, input the real-time tire pressure change curve and temperature change curve into a pre-trained tire leak recognition model for tire leak recognition until it is recognized that the target tire has leaked air or the user actively wakes up the vehicle controller; if it is recognized that the target tire has leaked air, trigger a tire leak alarm according to the foregoing steps. If the user actively wakes up the vehicle controller, send the tire pressure change curve, temperature change curve, as well as the updated current tire pressure and current temperature to the user terminal through the vehicle controller.

[0136] Further as an optional implementation manner, if the RF receiving module does not receive TPMS data within the second preset duration, enter the low-power mode until TPMS data is sensed again.

[0137] Specifically, if the RF receiving module of the embodiment of the present invention does not receive the TPMS data sent by the tire pressure monitoring module within a certain period of time, it automatically enters the low-power mode to reduce power consumption until the TPMS data sent by the tire pressure monitoring module is sensed again and then re-enters the working mode.

[0138] The method steps of the embodiment of the present invention are described above. It can be understood that the embodiment of the present invention determines whether to wake up the vehicle controller and trigger a TPMS warning according to the current tire pressure and current temperature of the target tire. After triggering the TPMS warning, the vehicle controller enters the sleep state, and no new TPMS warning is triggered for the target tire. And continuously identify whether the target tire has leaked air according to the tire pressure change curve and temperature change curve. If the target tire has leaked air, wake up the vehicle controller again to issue a tire leak alarm. If the target tire has not leaked air all the time, the vehicle controller is not automatically woken up. Wait until the user actively wakes up the vehicle controller and then send the tire pressure data and temperature data during this period to the user terminal. In this way, when only the tire pressure and / or temperature of the target tire is abnormal, the vehicle controller is only woken up once and a TPMS warning is triggered once. When the target tire has a tire leak, the vehicle controller is only woken up twice and a TPMS warning and a tire leak alarm are triggered once, avoiding repeatedly waking up the vehicle controller due to abnormal tire pressure monitoring after the vehicle is powered off, reducing the power consumption of tire pressure monitoring warning after the vehicle is powered off, and improving the endurance of the vehicle.

[0139] Refer to Figure 2 , the embodiment of the present invention provides a tire pressure monitoring warning system after the vehicle is powered off, including:

[0140] The radio frequency receiving module is used to obtain the TPMS data sent by the tire pressure monitoring module, determine the current tire pressure and current temperature of the target tire according to the TPMS data, and continuously record the tire pressure change curve and temperature change curve of the target tire;

[0141] The TPMS warning module is used to wake up the vehicle controller when the current tire pressure is lower than the preset tire pressure threshold and / or the current temperature is lower than the preset temperature threshold, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state;

[0142] The air leakage identification module is used to input the tire pressure change curve and temperature change curve into the pre-trained tire air leakage identification model to obtain the air leakage identification result of the target tire;

[0143] The air leakage alarm module is used to wake up the vehicle controller again when the target tire has a leak, so that the vehicle controller sends a tire air leakage alarm to the user terminal;

[0144] The data sending module is used to send the tire pressure change curve and temperature change curve to the user terminal through the vehicle controller when the target tire does not have a leak after the vehicle controller is actively awakened by the user.

[0145] The content in the above method embodiments is applicable to the present system embodiment. The functions specifically implemented by the present system embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those of the above method embodiments.

[0146] Refer to Figure 3 , an embodiment of the present invention provides a tire pressure monitoring and warning device after vehicle power-off, including:

[0147] At least one processor;

[0148] At least one memory for storing at least one program;

[0149] When the above at least one program is executed by the above at least one processor, the above at least one processor implements the above-mentioned tire pressure monitoring and warning method after vehicle power-off.

[0150] The content in the above method embodiments is applicable to the present device embodiment. The functions specifically implemented by the present device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those of the above method embodiments.

[0151] An embodiment of the present invention also provides a computer-readable storage medium, in which a program executable by a processor is stored, and the program executable by the processor is used to execute the above-mentioned tire pressure monitoring and warning method after vehicle power-off when executed by the processor.

[0152] A computer-readable storage medium according to an embodiment of the present invention can execute a tire pressure monitoring and warning method provided by the method embodiment of the present invention, can execute any combination of implementation steps of the method embodiment, and has the corresponding functions and beneficial effects of the method.

[0153] An embodiment of the present invention also discloses a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes Figure 1 the method shown.

[0154] In some alternative embodiments, the functions / operations mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, two consecutive blocks shown can actually be executed substantially simultaneously or the above-mentioned blocks can sometimes be executed in the reverse order. In addition, the embodiments presented and described in the flowcharts of the present invention are provided by way of example for the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operations and logical flows presented herein. Alternative embodiments are contemplated, in which the order of various operations is changed and sub-operations described as part of a larger operation are executed independently.

[0155] In addition, although the present invention is described in the context of functional modules, it should be understood that unless otherwise stated to the contrary, one or more of the above functions and / or features may be integrated in a single physical device and / or software module, or one or more functions and / or features may be implemented in separate physical devices or software modules. It can also be understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present invention. Rather, considering the attributes, functions, and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the ordinary skills of an engineer. Therefore, those skilled in the art can implement the present invention set forth in the claims without undue experimentation using ordinary skills. It can also be understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, and the scope of the present invention is determined by the full scope of the appended claims and their equivalents.

[0156] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above methods in various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs, Read-Only Memories), random access memories (RAMs, Random Access Memories), magnetic disks, or optical discs.

[0157] The logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatuses, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0158] More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection part with one or more wirings (electronic device), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, a computer-readable medium can even be paper or other suitable media on which the above program can be printed, because the above program can be obtained electronically, for example, by optically scanning the paper or other media, then editing, interpreting, or processing it in other suitable ways when necessary, and then storing it in a computer memory.

[0159] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0160] In the above description of this specification, the descriptions referring to the terms "one embodiment / Example", "another embodiment / Example" or "certain embodiments / Examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0161] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

[0162] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A method for tire pressure monitoring and warning after a vehicle is powered off, characterized in that, It includes the following steps: Obtain the TPMS data sent by the tire pressure monitoring module, determine the current tire pressure and current temperature of the target tire according to the TPMS data, and continuously record the tire pressure change curve and temperature change curve of the target tire; When the current tire pressure is lower than the preset tire pressure threshold, and / or the current temperature is lower than the preset temperature threshold, wake up the vehicle controller, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state; Input the tire pressure change curve and the temperature change curve into a pre-trained tire leak identification model to obtain the leak identification result of the target tire; When a leak occurs in the target tire, wake up the vehicle controller again, so that the vehicle controller sends a tire leak alarm to the user terminal; When no leak occurs in the target tire, after the vehicle controller is actively awakened by the user, send the tire pressure change curve and the temperature change curve to the user terminal through the vehicle controller.

2. The tire pressure monitoring and warning method after vehicle power-off according to claim 1, wherein, The obtaining of the TPMS data sent by the tire pressure monitoring module and determining the current tire pressure and current temperature of the target tire according to the TPMS data specifically includes: Receive the TPMS data through a radio frequency receiving module, and parse the TPMS data to obtain the device ID, tire pressure field, and temperature field; Determine the corresponding target tire according to the device ID, and determine the current tire pressure and the current temperature of the target tire according to the tire pressure field and the temperature field.

3. The tire pressure monitoring and warning method after vehicle power-off according to claim 1, characterized in that The step of when the current tire pressure is lower than the preset tire pressure threshold, and / or the current temperature is lower than the preset temperature threshold, wake up the vehicle controller, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state specifically includes: When the current tire pressure is lower than the tire pressure threshold and the current temperature is not lower than the temperature threshold, generate a TPMS warning message about too low tire pressure; When the current tire pressure is not lower than the tire pressure threshold and the current temperature is lower than the temperature threshold, generate a TPMS warning message about too low temperature; When the current tire pressure is lower than the tire pressure threshold and the current temperature is lower than the temperature threshold, generate a TPMS warning message about too low tire pressure and temperature; Wake up the vehicle controller, so that the vehicle controller sends the TPMS warning message to the user terminal and enters the sleep state after a first preset duration.

4. A method for tire pressure monitoring and warning after vehicle power-off according to claim 1, characterized in that, The tire leak identification model is trained through the following steps: Obtain the tire pressure change sample data and temperature change sample data of multiple test tires, and determine the corresponding tire state labels through manual annotation; Input the tire pressure change sample data and the temperature change sample data into a pre-constructed long short-term memory network to obtain a leak prediction result; Determine the loss value according to the leak prediction result and the tire state label; Update the parameters of the long short-term memory network according to the loss value to obtain the tire leak identification model; Wherein, the tire state labels include normal, mild leak, moderate leak, and severe leak.

5. A method for tire pressure monitoring and warning after a vehicle is powered off, characterized in that, When the target tire has a flat tire, the vehicle controller is woken up again, so that the vehicle controller sends a tire flat alarm to the user terminal, which specifically includes: When the target tire has a flat tire, determine the severity of the flat tire according to the flat tire recognition result, and generate a tire flat alarm of the corresponding level; Wake up the vehicle controller again, and send the tire flat alarm, the tire pressure change curve, and the temperature change curve to the user terminal through the vehicle controller.

6. A method for tire pressure monitoring and warning after a vehicle is powered off, characterized in that, When the target tire does not have a flat tire, after the vehicle controller is actively woken up by the user, the tire pressure change curve and the temperature change curve are sent to the user terminal through the vehicle controller, which specifically includes: When the target tire does not have a flat tire, continue to record the tire pressure change curve and the temperature change curve of the target tire, and return to the step of inputting the tire pressure change curve and the temperature change curve into a pre-trained tire flat recognition model until it is recognized that the target tire has a flat tire or the vehicle controller is actively woken up by the user; When the vehicle controller is actively woken up by the user, obtain the updated current tire pressure and the current temperature, and send the tire pressure change curve, the temperature change curve, and the updated current tire pressure and the current temperature to the user terminal through the vehicle controller.

7. A method for tire pressure monitoring and warning after vehicle power-off according to claim 2, characterized in that: If the RF receiving module does not receive the TPMS data within the second preset duration, enter the low power consumption mode until the TPMS data is sensed again.

8. A tire pressure monitoring and warning system after the vehicle is powered off, characterized in that, Including: An RF receiving module, configured to obtain TPMS data sent by a tire pressure monitoring module, determine the current tire pressure and the current temperature of the target tire according to the TPMS data, and continuously record the tire pressure change curve and the temperature change curve of the target tire; A TPMS warning module, configured to wake up the vehicle controller when the current tire pressure is lower than a preset tire pressure threshold and / or the current temperature is lower than a preset temperature threshold, so that the vehicle controller sends a TPMS warning message to the user terminal and then enters the sleep state; A flat tire recognition module, configured to input the tire pressure change curve and the temperature change curve into a pre-trained tire flat recognition model to obtain a flat tire recognition result of the target tire; A flat tire alarm module, configured to wake up the vehicle controller again when the target tire has a flat tire, so that the vehicle controller sends a tire flat alarm to the user terminal; A data sending module, configured to send the tire pressure change curve and the temperature change curve to the user terminal through the vehicle controller after the vehicle controller is actively woken up by the user when the target tire does not have a flat tire.

9. A tire pressure monitoring and warning device after the vehicle is powered off, characterized in that, Including: At least one processor; At least one memory, configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements a method for monitoring and warning tire pressure after vehicle power-off as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a program executable by a processor, characterized in that, The program executable by the processor, when executed by the processor, is used to execute a method for monitoring and warning tire pressure after a vehicle is powered off as described in any one of claims 1 to 7.

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