Tire pressure monitoring method and device and storage medium

Abstract

The invention discloses a tire pressure monitoring method and device and a storage medium, and belongs to the technical field of vehicle control. The method comprises the following steps: reading the load, the temperature and the pressure of a tire of a vehicle; correcting the pressure of the tire based on the load of the tire to obtain the corrected pressure; calculating a tire pressure early warning threshold value based on the temperature of the tire, wherein the tire pressure early warning threshold value comprises a high-pressure early warning threshold value and a low-pressure early warning threshold value; determining a tire pressure risk condition according to the corrected pressure and a tire pressure early warning threshold value, wherein the tire pressure risk condition comprises a safety condition, an early warning condition, an alarm condition or an emergency condition; and responding to the condition that the tire pressure risk condition of at least one tire is an early warning condition, an alarm condition or an emergency condition, and triggering a treatment prompt for the tire. Triggering judgment of early warning of the abnormal tire pressure is adjusted along with the environment and the load, and the accuracy of early warning of the abnormal tire pressure is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle control technology, and in particular to a tire pressure monitoring method, device, and storage medium. Background Art

[0002] During vehicle driving, tire monitoring is crucial to vehicle safety. Providing an early warning to the driver when tire pressure is abnormal can prevent serious danger to the vehicle. Related technologies use fixed thresholds and the pressure collected by the sensor to determine whether to trigger an abnormal tire pressure warning. This is not accurate enough in diverse environments and loads. Furthermore, repeated warnings cannot be issued for each tire in advance, forcing the driver to repeatedly deflate the tires. Therefore, adapting the triggering of abnormal tire pressure warnings to the environment and load, as well as linking warnings for multiple tires, is crucial to simplifying driver operations and improving the accuracy of abnormal tire pressure warnings. Summary of the Invention

[0003] The embodiments of the present application provide a tire pressure monitoring method, device, and storage medium, which can improve the accuracy of abnormal tire pressure warning. The technical solution is as follows:

[0004] In one aspect, an embodiment of the present application provides a tire pressure monitoring method, the method comprising:

[0005] Read the vehicle's tire load, tire temperature and tire pressure;

[0006] Correcting the tire pressure based on the tire load to obtain a corrected tire pressure;

[0007] Calculating a tire pressure warning threshold based on the temperature of the tire, the tire pressure warning threshold including a high pressure warning threshold and a low pressure warning threshold;

[0008] determining a tire pressure risk situation based on the corrected pressure and the tire pressure warning threshold, the tire pressure risk situation including a safety situation, a warning situation, an alarm situation, or an emergency situation;

[0009] In response to the tire pressure risk condition of at least one tire being the warning condition, the alarm condition, or the emergency condition, a processing prompt for the tire is triggered.

[0010] In another aspect, a tire pressure monitoring device is provided, the device comprising:

[0011] The first reading module is used to read the load, temperature and pressure of the tire of the vehicle;

[0012] A correction module, configured to correct the tire pressure based on the tire load to obtain a corrected pressure;

[0013] a first calculation module, configured to calculate a tire pressure warning threshold based on the temperature of the tire, the tire pressure warning threshold including a high pressure warning threshold and a low pressure warning threshold;

[0014] a first determining module, configured to determine a tire pressure risk situation according to the corrected tire pressure and the tire pressure warning threshold, wherein the tire pressure risk situation includes a safety situation, a warning situation, an alarm situation, or an emergency situation;

[0015] The second triggering module is configured to trigger a processing prompt for at least one tire in response to the tire pressure risk condition of at least one tire being the warning condition, the alarm condition, or the emergency condition.

[0016] On the other hand, a non-temporary computer-readable storage medium is also provided, characterized in that a computer program is stored in the computer-readable storage medium, and the computer program is loaded and executed by a processor to implement any of the tire pressure monitoring methods described above.

[0017] On the other hand, a computer program product is also provided, which includes computer instructions, and when the computer instructions are executed by a processor, the steps of any of the above-mentioned tire pressure monitoring methods are implemented.

[0018] The technical solution provided by this application brings at least the following beneficial effects:

[0019] This application corrects the tire pressure based on the tire load, calculates the tire pressure warning threshold according to the tire temperature, and then determines the tire pressure risk situation based on the corrected pressure and the tire pressure warning threshold. If the tire pressure risk situation of at least one tire is a warning situation, an alarm situation or an emergency situation, a processing prompt for the tire is triggered, and the trigger judgment of the tire pressure abnormality warning is adjusted according to the environment and load, thereby improving the accuracy of the tire pressure abnormality warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a schematic diagram of an implementation environment provided by an embodiment of the present application;

[0022] Figure 2 This is a flow chart of a tire pressure monitoring method provided in an embodiment of the present application;

[0023] Figure 3 This is a flow chart for determining systemic risk provided by an embodiment of the present application;

[0024] Figure 4 It is a structural schematic diagram of a tire pressure monitoring device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0026] This application embodiment provides a tire pressure monitoring method, please refer to Figure 1 , which shows a schematic diagram of an implementation environment for the method provided in an embodiment of the present application. This implementation environment may include: an ECU (Electronic Control Unit) 11, a tire pressure sensor 12, a wheel speed sensor 13, a first temperature sensor 14, a second temperature sensor 15, a center console display 16, and a vehicle audio system 17.

[0027] In one possible implementation, a tire pressure sensor 12 is installed on each tire to read the load and pressure of each tire and determine whether the tire is being deflated or inflated. A wheel speed sensor 13 is installed on each wheel to collect the vehicle's wheel speed, which is used to calculate the vehicle's driving speed. A first temperature sensor 14 is integrated into the module containing the tire pressure sensor 12 and is used to read the temperature of each tire. A second temperature sensor 15 is installed on the exterior of the vehicle to collect the ambient temperature of the vehicle's surroundings.

[0028] For example, the center console display 16 is used to display information about the tire that triggered the alert and its tire pressure risk; display information about the tires that triggered the batch alert and prompt the user to collectively check the operating status of the inflation valves and any leaks in the tires that triggered the batch alert; display systemic risk alert information and information about the tires that experienced the systemic risk. The vehicle's audio system 17 is used to announce the tire information and tire pressure risk; announce the content of the batch alert; and announce systemic risk alert information and information about the tires that experienced the systemic risk.

[0029] The ECU 11 , the tire pressure sensor 12 , the wheel speed sensor 13 , the first temperature sensor 14 , the second temperature sensor 15 , the display screen 16 of the center console and the vehicle audio system 17 establish communication connections via a wired or wireless network.

[0030] Based on the above Figure 1 In the implementation environment shown, the present application embodiment provides a tire pressure monitoring method such as Figure 2As shown, taking the method applied to ECU as an example, the method includes steps 201 to 205.

[0031] In step 201 , the ECU reads the load, temperature, and pressure of the tires of the vehicle.

[0032] In one possible implementation, the ECU reads the load, temperature, and pressure of the vehicle's tires, including: the ECU reads the load and pressure of each tire through a tire pressure sensor, wherein the tire pressure sensor is installed on each tire; and reads the temperature of each tire through a first temperature sensor, wherein the first temperature sensor is integrated in the module where the tire pressure sensor is located.

[0033] In step 202 , the ECU corrects the tire pressure based on the tire load to obtain a corrected tire pressure.

[0034] For example, after obtaining the tire load and tire pressure, the ECU corrects the tire pressure based on the tire load to obtain the corrected pressure, including: calculating the difference between the tire load and the calibrated load; and calculating the corrected pressure based on the difference and the tire pressure. The formula for calculating the corrected pressure is as follows:

[0035] P target =P target_old +k×ΔW

[0036] P target is the corrected pressure, P target_old is the tire pressure read from the tire pressure sensor, ΔW is the difference between the tire load and the rated tire load, and k is the tire stiffness coefficient. The rated tire load can be pre-determined based on experience, and the tire stiffness coefficient can also be pre-determined based on the tire material.

[0037] In step 203 , the ECU calculates a tire pressure warning threshold based on the tire temperature. The tire pressure warning threshold includes a high pressure warning threshold and a low pressure warning threshold.

[0038] In one possible implementation, after obtaining the tire temperature, the ECU calculates the tire pressure warning threshold based on the tire temperature, where the tire pressure warning threshold includes a high pressure warning threshold and a low pressure warning threshold. For example, calculating the tire pressure warning threshold based on the tire temperature includes: calculating the ratio of the tire temperature to the calibration temperature; calculating the low pressure warning threshold based on the ratio and a basic low pressure threshold; and calculating the high pressure warning threshold based on the ratio and a basic high pressure threshold. Optionally, the formula for calculating the tire pressure warning threshold is as follows:

[0039]

[0040] Pthreshold is the tire pressure warning threshold, P base is the basic warning threshold, T current is the tire temperature, T base is the rated temperature of the tire.

[0041] For example, the basic warning threshold can be a basic low pressure threshold or a basic high pressure threshold. When the P value obtained at the basic low pressure threshold is threshold is the low pressure warning threshold; when it is the basic high pressure threshold, the P threshold The high pressure warning threshold can be set in advance based on experience. The tire calibration temperature can be set in advance based on the tire's condition at the calibration temperature.

[0042] In step 204 , the ECU determines a tire pressure risk situation based on the corrected tire pressure and the tire pressure warning threshold. The tire pressure risk situation includes a safety situation, a warning situation, an alarm situation, or an emergency situation.

[0043] In one possible implementation, after completing the calculation of the corrected pressure size and the tire pressure warning threshold, the tire pressure risk situation is determined based on the corrected pressure size and the tire pressure warning threshold, including: in response to the corrected pressure size being greater than or equal to the low pressure warning threshold minus a buffer value and less than or equal to the high pressure warning threshold plus the buffer value, determining that the tire pressure risk situation is a safe situation; in response to the corrected pressure size being greater than or equal to the low pressure warning threshold minus two times the buffer value and less than the low pressure warning threshold minus the buffer value, or the corrected pressure size being greater than the high pressure warning threshold plus the buffer value and less than or equal to the high pressure warning threshold plus two times the buffer value, determining that the tire pressure risk situation is a warning situation; in response to the corrected pressure size being less than the low pressure warning threshold minus two times the buffer value or greater than the high pressure warning threshold plus two times the buffer value, calculating the tire pressure change rate based on the corrected pressure size; in response to the tire pressure change rate being less than or equal to the change rate threshold, determining that the tire pressure risk situation is an alarm situation; in response to the tire pressure change rate being greater than the change rate threshold, determining that the tire pressure risk situation is an emergency situation.

[0044] For example, after obtaining the corrected tire pressure, the low-pressure warning threshold, and the high-pressure warning threshold, the corrected tire pressure is compared with the low-pressure warning threshold and the high-pressure warning threshold. If the corrected tire pressure is greater than or equal to the low-pressure warning threshold minus the buffer value and less than or equal to the high-pressure warning threshold plus the buffer value, the ECU determines that the tire pressure risk condition is a safe condition. If the corrected tire pressure is greater than or equal to the low-pressure warning threshold minus twice the buffer value and less than the low-pressure warning threshold minus the buffer value, or if the corrected tire pressure is greater than the high-pressure warning threshold plus the buffer value and less than or equal to the high-pressure warning threshold plus twice the buffer value, the ECU determines that the tire pressure risk condition is a warning condition.

[0045] Optionally, if the corrected pressure is less than the low-pressure warning threshold minus two times the buffer value, or greater than the high-pressure warning threshold plus two times the buffer value, the ECU calculates the tire pressure change rate based on the corrected pressure, including calculating the change in the corrected pressure over a specified period of time and dividing it by the specified period, and using the result as the tire pressure change rate. The ECU then compares the tire pressure change rate with a change rate threshold. If the tire pressure change rate is less than or equal to the change rate threshold, the ECU determines the tire pressure risk situation as a warning; if the tire pressure change rate is greater than the change rate threshold, the ECU determines the tire pressure risk situation as an emergency.

[0046] Exemplarily, the buffer value and the change rate threshold value may be set based on experience. For example, the buffer value may be set to 5 kPa (kilopascals), and the change rate threshold value may be set to 1 kPa / minute.

[0047] In step 205 , in response to the tire pressure risk condition of at least one tire being a warning condition, an alarm condition, or an emergency condition, the ECU triggers a tire processing prompt.

[0048] In one possible implementation, if the tire pressure risk condition of at least one tire is a warning, alarm, or emergency condition, the ECU triggers a tire handling prompt. Optionally, the ECU triggers the tire handling prompt in a manner that includes, but is not limited to: if the tire pressure risk condition of any tire is a warning, the ECU controls the center console display to display information about the tire that triggered the prompt and the tire pressure risk condition of the tire, controls the vehicle audio system to broadcast the tire information and tire pressure risk condition, and controls the interior vehicle lights to flash at a preset frequency and color.

[0049] For example, the preset frequency and preset color can be set based on experience. For example, the preset frequency corresponding to the warning situation, the alarm situation, or the emergency situation gradually increases; the preset color corresponding to the warning situation is green; the preset color corresponding to the alarm situation is yellow; and the preset color corresponding to the emergency situation is red.

[0050] Optionally, the tire pressure risk conditions of each tire are continuously monitored, and in response to at least one tire switching to a warning condition, an alarm condition or an emergency condition due to reduced tire pressure, the leakage rate of the tire with reduced tire pressure is obtained; a collaborative warning threshold is calculated based on the leakage rate; and in response to the pressure of any remaining tire except the tire with reduced tire pressure being greater than or equal to the collaborative warning threshold minus the tolerance interval, and less than or equal to the collaborative warning threshold plus the tolerance interval, processing prompts for the remaining tires are triggered.

[0051] In one possible implementation, if at least one tire's tire pressure risk condition switches to a warning condition, an alarm condition, or an emergency condition due to reduced tire pressure, the ECU calculates the tire's air leakage rate based on the tire pressure change rate of the reduced tire. The ECU then calculates a coordinated warning threshold based on the tire's air leakage rate to determine whether other tires besides the reduced tire have air leakage. The formula for calculating the coordinated warning threshold is as follows:

[0052]

[0053] is the collaborative warning threshold, P j (0) is the current pressure of other tires, α A is the air leakage rate of the tire with reduced tire pressure, t is the time duration, and δ is the tolerance interval, where the tolerance interval can be set based on experience, for example, set to 10 kPa.

[0054] Exemplarily, after completing the calculation of the collaborative warning threshold, the tire pressures of all tires except the tire with reduced tire pressure are compared with the collaborative warning threshold. If the tire pressures of any tires except the tire with reduced tire pressure are greater than or equal to the collaborative warning threshold minus the tolerance interval, and less than or equal to the collaborative warning threshold plus the tolerance interval, the ECU triggers a batch processing prompt for the remaining tires.

[0055] In one possible implementation, the ECU triggers batch processing prompts for the remaining tires, including but not limited to: the ECU controls the display screen of the center console to display information about the tires that triggered the batch prompts and prompts the user to uniformly check the working conditions of the inflation valves and the air leakage conditions of the tires that triggered the batch prompts, and controls the vehicle's audio to broadcast the content of the batch prompts.

[0056] Optionally, the vehicle's driving speed and the ambient temperature of the vehicle's environment can also be obtained; the tire pressure at the current moment is predicted based on the tire pressure at the previous moment and the driving speed and ambient temperature at the current moment to obtain the predicted pressure at the current moment; the actual pressure at the current moment is calculated based on the predicted pressure at the current moment and the tire pressure at the current moment read; a covariance matrix of the pressures between each tire is constructed based on the actual pressures of each tire at the current moment; the detection result of systemic risk is obtained based on the covariance matrix, and the detection result of systemic risk is used to indicate whether the vehicle has systemic risk; in response to obtaining the detection result that the vehicle has systemic risk, a prompt for processing the systemic risk is triggered.

[0057] For example, the ECU acquires the vehicle's speed and the ambient temperature of the vehicle's environment. The ECU may acquire the vehicle's speed using a wheel speed sensor and calculate the vehicle's speed based on the wheel speed; and acquire the ambient temperature of the vehicle's environment using a second temperature sensor. The wheel speed sensor is mounted on the wheel, and the second temperature sensor is mounted outside the vehicle.

[0058] In one possible implementation, after the vehicle's driving speed and the ambient temperature of the vehicle's environment are collected, the tire pressure at the current moment is predicted based on the tire pressure at the previous moment and the driving speed and ambient temperature at the current moment to obtain the predicted pressure at the current moment. The formula for calculating the predicted pressure at the current moment is as follows:

[0059] X k =Ax k-1 +Bu k +W k

[0060] X k Ax is the predicted tire pressure at the current moment. k-1 is the tire pressure at the previous moment, u k is the current vehicle speed and the ambient temperature of the vehicle’s environment, W k is the process noise, A and B are preset coefficients. k The process noise can be measured in advance through experiments, and A and B can be set in advance based on experience.

[0061] Optionally, after the calculation of the predicted pressure at the current moment is completed, the actual pressure at the current moment is calculated based on the predicted pressure at the current moment and the tire pressure at the current moment. The formula for calculating the actual pressure at the current moment is as follows:

[0062] Y k =X k +K k (Z k -HX k )

[0063] Y k is the actual pressure at the current moment; Z k is the tire pressure at the current moment read from the tire pressure sensor; H is the observation matrix used to establish X k With Z k The linear relationship between k is the Kalman gain, used to balance X k With Z k The degree of trust between them.

[0064] For example, after the calculation of the actual pressure at the current moment is completed, the covariance of the pressures between the tires is calculated based on the actual pressures of the tires at the current moment, and then the covariance matrix of the pressures between the tires is constructed. The covariance matrix is as follows:

[0065]

[0066] σ ij represents the covariance of pressure changes between tires i and j.

[0067] In one possible implementation, the detection result of systemic risk is obtained based on the covariance matrix, including: if the non-diagonal elements in the covariance matrix exceed the covariance threshold, the detection result that the vehicle has systemic risk is obtained; if all the non-diagonal elements in the covariance matrix do not exceed the covariance threshold, the detection result that the vehicle does not have systemic risk is obtained.

[0068] Optionally, after obtaining the detection result that the vehicle has a systemic risk, the ECU triggers a prompt for handling the systemic risk, including: the ECU controls the display screen of the center console to display a prompt message of the systemic risk and information about the tires that have the systemic risk, and controls the vehicle's audio to broadcast a prompt message of the systemic risk and information about the tires that have the systemic risk.

[0069] For example, when any tire of the vehicle is deflated or inflated, the pressure of the remaining tires within a certain period of time in the future is predicted to obtain the predicted pressure of the remaining tires; based on the predicted pressure of the remaining tires, the tire pressure risk situation of the remaining tires within a certain period of time in the future is determined; in response to the tire pressure risk situation of the remaining tires within a certain period of time in the future including a warning situation, an alarm situation or an emergency situation, a processing prompt for the remaining tires is triggered.

[0070] In one possible implementation, when the ECU detects through the tire pressure sensor that any tire of the vehicle is being deflated or inflated, it uses a Kalman filter to predict the pressure of the remaining tires within a certain period of time in the future, obtaining the predicted pressures for the remaining tires. The predicted pressures for the remaining tires are then compared with the tire pressure warning threshold to determine the tire pressure risk for the remaining tires within a certain period of time. If the tire pressure risk for the remaining tires within a certain period of time includes a warning, alarm, or emergency situation, the ECU triggers a prompt to handle the remaining tires.

[0071] Optionally, the pressure of each tire is continuously monitored, and in response to the pressure of any tire increasing to a first release pressure threshold, the processing prompt for the tire is stopped; in response to at least stopping the processing prompt for one tire, and when the pressure of the remaining tires being processed increases to a second release pressure threshold, the processing prompt for the remaining tires is stopped, the second release pressure threshold is less than the first release pressure threshold and the difference between the second release pressure threshold and the first release pressure threshold is less than the pressure threshold; in response to the pressure of all tires of the vehicle being greater than or equal to the low pressure warning threshold plus the buffer value and less than or equal to the high pressure warning threshold minus the buffer value, and the tire pressure change rate is less than or equal to the change rate threshold, the processing prompt for all tires of the vehicle is stopped.

[0072] For example, if the pressure of any tire increases to a first pressure release threshold, the ECU stops providing prompts for that tire. After the prompts for at least one tire have been stopped, and the pressures of the remaining tires receiving prompts increase to a second pressure release threshold, the ECU stops providing prompts for the remaining tires. The second pressure release threshold is lower than the first pressure release threshold, and the difference between the second pressure release threshold and the first pressure release threshold is lower than the pressure threshold.

[0073] In one possible implementation, the first release pressure threshold can be set based on the vehicle's recommended cold tire pressure. For example, the first interval threshold can be subtracted from the vehicle's recommended cold tire pressure. For example, if the recommended cold tire pressure is 220 kPa and the first interval threshold is 7 kPa, the first release pressure threshold is 213 kPa. The second release pressure threshold can be set based on experience, for example, 10 kPa, minus the second interval threshold.

[0074] Optionally, if the pressure of all tires of the vehicle is greater than or equal to the low pressure warning threshold plus the buffer value and less than or equal to the high pressure warning threshold minus the buffer value, and the tire pressure change rate is less than or equal to the change rate threshold, the ECU stops processing prompts for all tires of the vehicle.

[0075] In summary, Figure 3 The following flowchart illustrates a systemic risk assessment process. Step 301 calculates the current predicted pressure using Kalman filter data fusion. Step 302 calculates the current actual pressure. Step 303 constructs a covariance matrix. Step 304 determines whether any off-diagonal elements in the covariance matrix exceed the covariance threshold. Step 305 triggers a prompt for systemic risk management.

[0076] The embodiment of the present application corrects the tire pressure based on the tire load, calculates the tire pressure warning threshold according to the tire temperature, and then determines the tire pressure risk situation based on the corrected pressure and the tire pressure warning threshold. If the tire pressure risk situation of at least one tire is a warning situation, an alarm situation or an emergency situation, a processing prompt for the tire is triggered, so that the trigger judgment of the abnormal tire pressure warning is adjusted according to the environment and load, thereby improving the accuracy of the abnormal tire pressure warning.

[0077] See also Figure 4 , an embodiment of the present application provides a tire pressure monitoring device, the device comprising:

[0078] The first reading module 401 is used to read the load, temperature and pressure of the tires of the vehicle;

[0079] Correction module 402, configured to correct the tire pressure based on the tire load to obtain a corrected pressure;

[0080] A first calculation module 403 is configured to calculate a tire pressure warning threshold based on the tire temperature, where the tire pressure warning threshold includes a high pressure warning threshold and a low pressure warning threshold;

[0081] A first determining module 404 is configured to determine a tire pressure risk condition based on the corrected tire pressure and the tire pressure warning threshold, where the tire pressure risk condition includes a safety condition, a warning condition, an alarm condition, or an emergency condition;

[0082] The second triggering module 405 is configured to trigger a tire processing prompt in response to the tire pressure risk condition of at least one tire being a warning condition, an alarm condition, or an emergency condition.

[0083] In a possible implementation, the correction module 402 is configured to calculate a difference between the tire load and the calibrated load; and calculate a corrected tire pressure based on the difference and the tire pressure.

[0084] In one possible implementation, the first calculation module 403 is configured to calculate a ratio of the tire temperature to the calibration temperature; calculate a low pressure warning threshold based on the ratio and a basic low pressure threshold; and calculate a high pressure warning threshold based on the ratio and a basic high pressure threshold.

[0085] In one possible implementation, the first determination module 404 is used to determine that the tire pressure risk situation is a safe situation in response to the corrected pressure being greater than or equal to the low pressure warning threshold minus a buffer value and less than or equal to the high pressure warning threshold plus a buffer value; determine that the tire pressure risk situation is a warning situation in response to the corrected pressure being greater than or equal to the low pressure warning threshold minus twice the buffer value and less than the low pressure warning threshold minus the buffer value, or the corrected pressure being greater than the high pressure warning threshold plus the buffer value and less than or equal to the high pressure warning threshold plus twice the buffer value; calculate the tire pressure change rate based on the corrected pressure in response to the corrected pressure being less than the low pressure warning threshold minus twice the buffer value or greater than the high pressure warning threshold plus twice the buffer value; determine that the tire pressure risk situation is an alarm situation in response to the tire pressure change rate being less than or equal to the change rate threshold; determine that the tire pressure risk situation is an emergency situation in response to the tire pressure change rate being greater than the change rate threshold.

[0086] In one possible implementation, the device also includes: a first acquisition module, used to obtain the leakage rate of the tire with reduced tire pressure in response to the tire pressure risk situation of at least one tire switching to a warning situation, an alarm situation or an emergency situation due to reduced tire pressure; a second calculation module, used to calculate the collaborative warning threshold based on the leakage rate; a second trigger module, used to trigger processing prompts for the remaining tires in response to the tire pressure of any remaining tires except the tire with reduced tire pressure being greater than or equal to the collaborative warning threshold minus the tolerance interval, and less than or equal to the collaborative warning threshold plus the tolerance interval.

[0087] In one possible implementation, the device also includes: a second acquisition module, used to obtain the vehicle's driving speed and the ambient temperature of the vehicle's environment; a first prediction module, used to predict the tire pressure at the current moment based on the tire pressure at the previous moment and the driving speed and ambient temperature at the current moment, to obtain the predicted pressure at the current moment; a second reading module, used to calculate the actual pressure at the current moment based on the predicted pressure at the current moment and the read tire pressure at the current moment; a construction module, used to construct a covariance matrix of the pressures between each tire based on the actual pressures of each tire at the current moment; a third acquisition module, used to obtain a detection result of systemic risk based on the covariance matrix, and the detection result of systemic risk is used to indicate whether the vehicle has systemic risk; a third trigger module, used to trigger a prompt for processing the systemic risk in response to obtaining a detection result that the vehicle has systemic risk.

[0088] In one possible implementation, the device also includes: a second prediction module, which is used to predict the pressure of the remaining tires within a certain period of time in the future when any tire of the vehicle is deflated or inflated, so as to obtain the predicted pressure of the remaining tires; a second determination module, which is used to determine the tire pressure risk situation of the remaining tires within a certain period of time in the future based on the predicted pressure of the remaining tires; and a fourth triggering module, which is used to trigger a processing prompt for the remaining tires in response to the tire pressure risk situation of the remaining tires within a certain period of time in the future, including a warning situation, an alarm situation or an emergency situation.

[0089] In one possible implementation, the device also includes: a first stop module, used to stop the processing prompt for the tire in response to the pressure of any tire increasing to a first release pressure threshold; a second stop module, used to stop the processing prompt for the remaining tires in response to at least stopping the processing prompt for one tire, and when the pressure of the remaining tires for processing prompts increases to a second release pressure threshold, the second release pressure threshold is less than the first release pressure threshold and the difference between the second release pressure threshold and the first release pressure threshold is less than the pressure threshold; a third stop module, used to stop the processing prompt for all tires of the vehicle in response to the pressure of all tires of the vehicle being greater than or equal to the low pressure warning threshold plus the buffer value and less than or equal to the high pressure warning threshold minus the buffer value, and the tire pressure change rate is less than or equal to the change rate threshold.

[0090] This device corrects the tire pressure based on the tire load, calculates the tire pressure warning threshold according to the tire temperature, and then determines the tire pressure risk situation based on the corrected pressure and the tire pressure warning threshold. If the tire pressure risk situation of at least one tire is a warning situation, an alarm situation or an emergency situation, a processing prompt for the tire is triggered, so that the trigger judgment of the tire pressure abnormality warning is adjusted according to the environment and load, thereby improving the accuracy of the tire pressure abnormality warning.

[0091] It should be noted that the apparatus provided in the above embodiments is merely illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0092] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one computer program is stored. The at least one computer program is loaded and executed by a processor of a computer device to enable the computer to implement any of the above tire pressure monitoring methods.

[0093] In one possible implementation, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

[0094] In an exemplary embodiment, a computer program product or computer program is also provided. The computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform any of the above-described tire pressure monitoring methods.

[0095] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the vehicle tire load, tire temperature, tire pressure, and tire pressure risk involved in this application are all obtained with full authorization.

[0096] It should be understood that the term "plurality" used herein refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0097] It should be noted that the terms "first," "second," etc. (if any) in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the numbers used in this way are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the application as detailed in the appended claims.

[0098] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A tire pressure monitoring method, characterized in that: The method comprises: Read the vehicle's tire load, tire temperature and tire pressure; Correcting the tire pressure based on the tire load to obtain a corrected tire pressure; Calculating a tire pressure warning threshold based on the temperature of the tire, the tire pressure warning threshold including a high pressure warning threshold and a low pressure warning threshold; determining a tire pressure risk situation based on the corrected pressure and the tire pressure warning threshold, the tire pressure risk situation including a safety situation, a warning situation, an alarm situation, or an emergency situation; In response to the tire pressure risk condition of at least one tire being the warning condition, the alarm condition, or the emergency condition, a processing prompt for the tire is triggered.

2. The method according to claim 1, characterized in that Correcting the tire pressure based on the tire load to obtain the corrected pressure includes: Calculating the difference between the load of the tire and the calibrated load; The corrected pressure is calculated based on the difference and the tire pressure.

3. The method according to claim 1, characterized in that The calculating the tire pressure warning threshold based on the temperature of the tire includes: Calculating a ratio of the tire temperature to a calibration temperature; Calculating the low pressure warning threshold based on the ratio and the basic low pressure threshold; The high pressure warning threshold is calculated based on the ratio and a basic high pressure threshold.

4. The method according to claim 1, wherein The determining of the tire pressure risk according to the corrected tire pressure and the tire pressure warning threshold includes: In response to the corrected pressure being greater than or equal to a low pressure warning threshold value minus a buffer value and less than or equal to a high pressure warning threshold value plus a buffer value, determining that the tire pressure risk condition is the safe condition; In response to the corrected pressure being greater than or equal to a low pressure warning threshold minus two times a buffer value and less than the low pressure warning threshold minus the buffer value, or the corrected pressure being greater than a high pressure warning threshold plus the buffer value and less than or equal to the high pressure warning threshold plus two times the buffer value, determining the tire pressure risk condition to be the warning condition; In response to the corrected pressure being less than a low pressure warning threshold value minus two times a buffer value or greater than a high pressure warning threshold value plus two times a buffer value, calculating a tire pressure change rate based on the corrected pressure; In response to the tire pressure change rate being less than or equal to a change rate threshold, determining the tire pressure risk condition as the warning condition; In response to the tire pressure change rate being greater than a change rate threshold, the tire pressure risk situation is determined to be the emergency situation.

5. The method according to claim 1, wherein The method further comprises: In response to at least one tire switching from a tire pressure risk condition to the warning condition, the alarm condition, or the emergency condition due to reduced tire pressure, obtaining a leakage rate of the tire with reduced tire pressure; Calculating a collaborative warning threshold based on the air leakage rate; In response to the pressure of any tire other than the tire with reduced tire pressure being greater than or equal to the collaborative warning threshold minus the tolerance interval, and less than or equal to the collaborative warning threshold plus the tolerance interval, a processing prompt for the remaining tires is triggered.

6. The method according to claim 1, characterized in that The method further comprises: Obtaining the driving speed of the vehicle and the ambient temperature of the environment in which the vehicle is located; Predicting the tire pressure at the current moment based on the tire pressure at the previous moment and the driving speed and ambient temperature at the current moment to obtain the predicted pressure at the current moment; Calculating the actual pressure at the current moment based on the predicted pressure at the current moment and the read tire pressure at the current moment; Constructing a covariance matrix of the pressures of the tires based on the actual pressures of the tires at the current moment; Obtaining a detection result of systemic risk based on the covariance matrix, wherein the detection result of systemic risk is used to indicate whether the vehicle has systemic risk; In response to obtaining a detection result indicating that the vehicle has the systemic risk, a prompt for processing the systemic risk is triggered.

7. The method according to claim 6, characterized in that The method further comprises: When any tire of the vehicle is deflated or inflated, the pressures of the remaining tires within a certain period of time in the future are predicted to obtain the predicted pressures of the remaining tires; Determining tire pressure risk conditions of the remaining tires within the certain future time period based on the predicted pressures of the remaining tires; In response to the tire pressure risk situations of the remaining tires within a certain period of time in the future including the warning situation, the alarm situation or the emergency situation, a processing prompt for the remaining tires is triggered.

8. The method according to any one of claims 1, 6 or 7, characterized in that: The method further comprises: In response to the pressure of any tire increasing to a first release pressure threshold, stopping the processing prompt for the tire; In response to at least one tire being stopped from being prompted, and when the pressure of the remaining tires being prompted increases to a second release pressure threshold, stopping the prompting of the remaining tires, the second release pressure threshold being less than the first release pressure threshold and the difference between the second release pressure threshold and the first release pressure threshold being less than a pressure threshold; In response to the pressure of all tires of the vehicle being greater than or equal to the low pressure warning threshold plus the buffer value and less than or equal to the high pressure warning threshold minus the buffer value, and the tire pressure change rate being less than or equal to the change rate threshold, stop processing prompts for all tires of the vehicle.

9. A tire pressure monitoring device, characterized in that: The device comprises: The first reading module is used to read the load, temperature and pressure of the tire of the vehicle; A correction module, configured to correct the tire pressure based on the tire load to obtain a corrected pressure; a first calculation module, configured to calculate a tire pressure warning threshold based on the temperature of the tire, the tire pressure warning threshold including a high pressure warning threshold and a low pressure warning threshold; a first determining module, configured to determine a tire pressure risk situation according to the corrected tire pressure and the tire pressure warning threshold, wherein the tire pressure risk situation includes a safety situation, a warning situation, an alarm situation, or an emergency situation; The second triggering module is configured to trigger a processing prompt for at least one tire in response to the tire pressure risk condition of at least one tire being the warning condition, the alarm condition, or the emergency condition.

10. A non-transitory computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which is loaded and executed by a processor to implement the tire pressure monitoring method according to any one of claims 1 to 8.

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