CN117984703A

CN117984703A - Tire pressure early warning method, tire pressure early warning device, vehicle and storage medium

Info

Publication number: CN117984703A
Application number: CN202410185264.2A
Authority: CN
Inventors: 赵俊杰; 孙硕; 李哲; 刘博�; 郭赛赛
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2024-02-19
Filing date: 2024-02-19
Publication date: 2024-05-07

Abstract

The application provides a tire pressure early warning method, a tire pressure early warning device, a vehicle and a storage medium, and relates to the technical field of automobiles. The method comprises the following steps: acquiring a target ambient temperature of the vehicle, an internal temperature of the tire and an actual pressure value of the tire; obtaining a standard pressure value of the tire based on the target ambient temperature and the internal temperature; obtaining an early warning pressure value of the tire based on the standard pressure value; and determining whether to output the early warning information based on the early warning pressure value and the actual pressure value. The application can improve the accuracy of the tire pressure early warning.

Description

Tire pressure early warning method, tire pressure early warning device, vehicle and storage medium

Technical Field

The present application relates to the field of automotive technology, and more particularly, to a method of tire pressure warning in the field of automotive technology, a device of tire pressure warning, a vehicle, and a storage medium.

Background

The running stability of the vehicle has close relation with the tire pressure, and too low tire pressure can cause the heating and tire burst of the tire when the vehicle runs at a high speed, so that great potential safety hazard is caused. And the excessive tire pressure can cause the increase of the load applied to the vehicle in the running process, so that the loss of the vehicle in the running process is increased.

Currently, most vehicles on the market are equipped with tire pressure monitoring systems that are capable of monitoring the pressure of the tire after the vehicle is started. The tire pressure monitoring system can compare the tire pressure with the pressure threshold value when monitoring the tire pressure, and can remind the user when the tire pressure is abnormal (namely too high or too low).

However, since the pressure threshold is generally a fixed value set when the vehicle is off-line, it may be caused that deviation occurs when judging whether the tire pressure is abnormal, and thus false alarm is performed to the user.

Therefore, how to improve the accuracy of the tire pressure warning is a problem to be solved currently.

Disclosure of Invention

The application provides a tire pressure early warning method, a tire pressure early warning device, a vehicle and a storage medium.

In a first aspect, a method for early warning of tire pressure is provided, applied to a vehicle, the vehicle including a tire therein, the method comprising:

Acquiring a target ambient temperature of the vehicle, an internal temperature of the tire and an actual pressure value of the tire; obtaining a standard pressure value of the tire based on the target ambient temperature and the internal temperature; obtaining an early warning pressure value of the tire based on the standard pressure value; and determining whether to output the early warning information based on the early warning pressure value and the actual pressure value.

In the embodiment of the application, because the tire pressure of the tire in the vehicle may be affected by the running state of the vehicle and/or the weather temperature, if the tire pressure of the tire is pre-warned by using a fixed pre-warning pressure value, the deviation may occur when judging whether the tire pressure is abnormal or not, and further false alarm is carried out to a user. Therefore, the application introduces the environment temperature of the vehicle (namely the target environment temperature) and the internal environment temperature of the tire in the process of calculating the early warning pressure value of the tire, so that the early warning pressure value can be adjusted on the basis of the running state of the vehicle or the change of the weather temperature, thereby leading the early warning pressure value to be more in line with the current running state and the environment of the vehicle, reducing the possibility of false alarm to the user and improving the accuracy of the early warning of the tire pressure.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes:

If the signal transmission network of the vehicle is detected to enter a dormant state, acquiring a first environment temperature acquired from an awake state to the dormant state; the first ambient temperature is the effective ambient temperature of the last frame acquired from the awakening state to the dormant state; storing a first ambient temperature; the acquiring the target environmental temperature of the vehicle includes: if the signal transmission network is detected to enter a dormant state or a preset time length after the signal transmission network enters an awake state, taking the stored first environment temperature as a target environment temperature; the preset time length is obtained according to the time length required by the vehicle to collect the ambient temperature.

In the embodiment of the application, the signal transmission network of the vehicle cannot transmit the target environment temperature after entering the dormant state, so that the early warning function of the tire pressure is in a failure state. Therefore, in order to avoid that the signal transmission network of the vehicle cannot transmit the target environmental temperature after entering the sleep state, the effective environmental temperature (i.e., the first environmental temperature) of the last frame acquired from the wake-up state to the sleep state by the signal transmission network can be acquired and stored; when the signal transmission network enters a dormant state or the target environment temperature cannot be acquired within a preset time period after the signal transmission network enters an awake state, the first environment temperature is used as the target environment temperature, so that the early warning function of tire pressure can be normally performed, and the real-time performance of tire pressure early warning is ensured.

With reference to the first aspect and the foregoing implementation manner, in some implementation manners of the first aspect, the method further includes:

Acquiring a target duration of a signal transmission network in a dormant state; if the signal transmission network is detected to enter the sleep state, taking the stored first ambient temperature as the target ambient temperature, including: if the signal transmission network is detected to enter a dormant state and the target duration is smaller than a preset threshold, taking the stored first environment temperature as the target environment temperature.

In the embodiment of the application, the target duration of the transmission network in the dormant state is judged with the preset threshold value, and when the target duration is smaller than the preset threshold value, the stored first environment temperature is used as the target environment temperature, so that the situation that the signal transmission network is continuously in the dormant state for too long, the difference between the stored first environment temperature and the current weather temperature corresponding to the time when the signal transmission network reenters the awakening state is large, and if the stored first environment temperature is still used for early warning the tire pressure of the tire, false alarm can be caused. Therefore, the accuracy of the tire pressure early warning is improved through judging the target duration of the transmission network in the dormant state and the preset threshold value.

If the signal transmission network of the vehicle is detected to enter a dormant state, acquiring at least one frame of ambient temperature acquired from an awake state to the dormant state; carrying out average value processing on at least one frame of ambient temperature to obtain a second ambient temperature; storing a second ambient temperature; the acquiring the target environmental temperature of the vehicle includes: if the signal transmission network is detected to enter a dormant state or a preset time length after the signal transmission network enters an awake state, taking the stored second environment temperature as a target environment temperature; the preset time length is obtained according to the time length required by the vehicle to collect the ambient temperature.

In the embodiment of the application, the signal transmission network of the vehicle cannot transmit the target environment temperature after entering the dormant state, so that the early warning function of the tire pressure is in a failure state. Therefore, in order to avoid that the signal transmission network of the vehicle cannot transmit the target environment temperature after entering the dormant state, the multi-frame environment temperature acquired from the awakening state to the dormant state by the signal transmission network can be acquired, and the average value of the multi-frame environment temperature is processed to obtain the second environment temperature, so that the situation that the acquisition of one frame of environment temperature is too high or too low can be avoided, the accuracy of the target environment temperature is improved, and the accuracy of tire pressure early warning is improved.

After the second ambient temperature is obtained, the second ambient temperature is stored; the second environment temperature is used as the target environment temperature when the signal transmission network enters the dormant state or the target environment temperature cannot be acquired within the preset time after the signal transmission network enters the wake-up state, so that the early warning function of the tire pressure can be normally performed, and the real-time performance of the early warning of the tire pressure is ensured.

Acquiring a target duration of a signal transmission network in a dormant state; if the signal transmission network is detected to enter the sleep state, taking the stored second ambient temperature as the target ambient temperature, including: and if the signal transmission network is detected to enter a dormant state and the target duration is smaller than a preset threshold, taking the stored second environment temperature as the target environment temperature.

In the embodiment of the application, the target time length of the transmission network in the dormant state is judged with the preset threshold value, when the target time length is smaller than the preset threshold value, the stored second environment temperature is used as the target environment temperature, so that the situation that the signal transmission network is continuously in the dormant state for too long, the stored second environment temperature is larger than the current weather temperature corresponding to the time when the signal transmission network reenters the wake-up state, if the stored second environment temperature is still used for early warning the tire pressure of the tire, false alarm can be caused. Therefore, the accuracy of the tire pressure early warning is improved through judging the target duration of the transmission network in the dormant state and the preset threshold value.

If the target time length is greater than or equal to a preset threshold value, sending information for requesting to collect the current environmental temperature of the vehicle to an air conditioning module in the vehicle; if the current environmental temperature is acquired through the air conditioning module, updating the environmental temperature stored in the vehicle to the current environmental temperature; if the current ambient temperature is not acquired through the air conditioning module, the actual pressure value is not displayed.

In the embodiment of the application, if the target time is longer than or equal to the preset threshold value, it can be stated that the signal transmission network is continuously in the dormant state for too long, in order to avoid false alarm caused by detecting the tire pressure of the tire still using the first environmental temperature, the air conditioning module in the vehicle sends a request to collect the information of the current environmental temperature of the vehicle, so that the air conditioning module re-collects the environmental temperature (i.e. the current environmental temperature) of the vehicle, updates the environmental temperature (e.g. the first environmental temperature or the second environmental temperature) stored in the vehicle into the collected current environmental temperature, and uses the current environmental temperature to obtain the early warning pressure value, thereby ensuring the accuracy of the tire pressure early warning.

And if the air conditioning module cannot collect the current ambient temperature according to the request, indicating that the temperature collection process fails, in order to avoid displaying the wrong tire pressure to the user, the actual pressure value of the tire can not be displayed to the user, so that the user experience is improved.

With reference to the first aspect and the foregoing implementation manner, in some implementation manners of the first aspect, the obtaining, based on the target ambient temperature and the internal temperature, a standard pressure value of the tire includes:

Multiplying the internal temperature by a first preset pressure value to obtain a first numerical value; dividing the first value by the target ambient temperature to obtain a second value; subtracting a second preset pressure value from the second numerical value to obtain a standard pressure value; the first preset pressure value is obtained through the second preset pressure value and preset tire parameters, and the preset tire parameters are related to the attributes of the tire.

In the embodiment of the application, the early warning pressure value is obtained through the standard pressure value, but the standard pressure value in the vehicle may be influenced by the running state of the vehicle and/or the weather temperature, if the fixed standard pressure value is used for calculating the early warning pressure value, the early warning pressure value may be fixed and cannot be adjusted according to the running state of the vehicle or the weather temperature change, so that the early warning pressure value deviates from the current running state of the vehicle and the environment where the vehicle is located, and therefore, the deviation occurs when judging whether the tire pressure is abnormal or not, and the false alarm is further carried out to a user. Therefore, the application introduces the environment temperature of the vehicle and the internal environment temperature of the tire in the process of calculating the standard pressure value of the tire, so that the standard pressure value can be adjusted on the basis of the running state of the vehicle or the change of the weather temperature, and further the early warning pressure value can also be adjusted on the basis of the running state of the vehicle or the change of the weather temperature, thereby leading the early warning pressure value to be more in line with the current running state of the vehicle and the environment, reducing the possibility of false alarm to the user and improving the accuracy of the tire pressure early warning.

With reference to the first aspect and the foregoing implementation manner, in some implementation manners of the first aspect, the determining whether to output the early warning information based on the early warning pressure value and the actual pressure value includes:

And if the actual pressure value is smaller than or equal to the early warning pressure value, outputting early warning information.

In the embodiment of the application, when the actual pressure value of the tire is smaller than or equal to the early warning pressure value, the fact that the current tire pressure of the tire is too low possibly causes that the tire is heated and blasted when the vehicle runs at a high speed, so that a large potential safety hazard is caused.

In a second aspect, there is provided a tire pressure warning device for a vehicle, the vehicle including a tire, the device comprising:

An acquisition module for acquiring a target ambient temperature of the vehicle, an internal temperature of the tire, and an actual pressure value of the tire; the first processing module is used for obtaining a standard pressure value of the tire based on the target ambient temperature and the internal temperature; the second processing module is used for obtaining an early warning pressure value of the tire based on the standard pressure value; and the determining module is used for determining whether to output the early warning information or not based on the early warning pressure value and the actual pressure value.

In a third aspect, a vehicle is provided that includes a memory and a processor. The memory is for storing executable program code and the processor is for calling and running the executable program code from the memory such that the vehicle performs the method of the first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.

In a fifth aspect, a computer readable storage medium is provided, the computer readable storage medium storing computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.

Drawings

Fig. 1 is a schematic diagram of a tire pressure early warning scenario provided by an embodiment of the present application.

Fig. 2 is a flowchart of a method for early warning of tire pressure according to an embodiment of the present application.

Fig. 3 is a flowchart of another method for tire pressure warning according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a device for tire pressure warning according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Detailed Description

The technical scheme of the application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B: the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and furthermore, in the description of the embodiments of the present application, "plural" means two or more than two.

The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

Illustratively, as shown in FIG. 1, vehicle 110 is included in FIG. 1, and at least one tire 111 is included in vehicle 110.

The tire pressure of the tire 111 can determine the running stability of the vehicle 110, and too low tire pressure can cause the vehicle 110 to generate heat and burst when running at a high speed, so that a great potential safety hazard is caused. And excessive tire pressure may cause an increase in load applied to the vehicle 110 during operation, increasing loss of the vehicle 110 during operation. In order to avoid the occurrence of a situation in which the tire pressure is too high or too low, most of the vehicles on the market are equipped with a tire pressure monitoring system for monitoring the tire pressure of the tire 111.

For example, the tire pressure monitoring system may compare the tire pressure with a pressure threshold when monitoring the tire pressure, and alert the user when the tire pressure is abnormal (i.e., too high or too low) so that the user may repair the tire in time.

The setting of the Low Pressure (PL) alarm threshold value of the tire Pressure is set by referring to the requirements of the national regulation GB 26149: PL alarm threshold value is less than or equal to 75 percent x Pre-7 KPa. Wherein the nominal air pressure (Pressure Conventional, pre) is a fixed value written into the tire pressure controller by the host factory through the off-line equipment when the vehicle is produced. However, the fixed value cannot be changed according to the running state of the vehicle and/or the weather temperature, which may cause deviation in judging whether the tire pressure is abnormal or not, and thus misinformation is given to the user.

It should be noted that, the Prec written in the tire pressure controller may be set according to factors such as a tire model and a load bearing of a vehicle, which is not limited in the embodiment of the present application.

In order to solve the problem that false alarm is likely to be caused to a user when the tire pressure is monitored, the application provides a tire pressure early warning method, a tire pressure early warning device, a vehicle and a storage medium.

The method for tire pressure warning according to the embodiment of the present application is described in detail below with reference to fig. 2 to 3.

Fig. 2 is a flowchart of a method for early warning of tire pressure according to an embodiment of the present application. The method is applied to a vehicle and the vehicle includes a tire therein; the method may be performed by the vehicle 100 in fig. 1, or the tire pressure controller in the vehicle 110.

Illustratively, as shown in FIG. 2, the method 200 includes the following implementation:

s210, acquiring a target ambient temperature of the vehicle, an internal temperature of the tire, and an actual pressure value of the tire.

Wherein the target ambient temperature is used to represent an exterior surface temperature (i.e., weather temperature) of the tire, which may be detected by an air conditioning module in the vehicle; and, the vehicle may be provided with a temperature sensor and a pressure sensor in the inside of the tire, the inside temperature of the tire (i.e., the inside surface temperature of the tire) being detected by the temperature sensor, and the pressure value in the tire being detected by the pressure sensor; and then transmits the detected target ambient temperature, internal temperature of the tire, and actual pressure value to the tire pressure controller.

For example, the temperature of the outer surface of the tire detected by the air conditioning module, the temperature of the interior of the tire detected by the temperature sensor, and the actual pressure value of the tire detected by the pressure sensor may be obtained.

In one possible implementation manner, if the signal transmission network of the vehicle is detected to enter a dormant state, acquiring a first ambient temperature acquired from a wake-up state to the dormant state of the signal transmission network; the first ambient temperature is the effective ambient temperature of the last frame acquired from the awakening state to the dormant state; storing a first ambient temperature; the acquiring the target environmental temperature of the vehicle includes: if the signal transmission network is detected to enter a dormant state or a preset time length after the signal transmission network enters an awake state, taking the stored first environment temperature as a target environment temperature; the preset time length is obtained according to the time length required by the vehicle to collect the ambient temperature.

Alternatively, the signal transmission network may be a controller area network bus (Controller Area Network, CAN) in the vehicle, abbreviated as CAN network, having a function of data transmission between the respective controllers in the vehicle. When the CAN network is in a dormant state, namely the CAN network cannot work normally and cannot transmit data among the controllers; and when the CAN network is in an awake state, namely the CAN network works normally, data transmission is carried out among the controllers.

For example, when the vehicle is in a parking state (i.e. the vehicle speed is 0), the current states of the air conditioning module and the CAN network may be monitored in real time, and when the CAN network is detected to enter the sleep state from the wake state, in order to avoid the problem that the tire pressure controller cannot obtain the outer surface temperature of the tire when the CAN network is in the sleep state, and thus cannot monitor the tire pressure of the tire, an effective ambient temperature (may be referred to as a "first ambient temperature") of a last frame collected from the wake state to the sleep state by the CAN network may be obtained, and the first ambient temperature is stored in a storage module of the vehicle.

Optionally, when the CAN network is detected to enter the sleep state from the wake state, a plurality of frame environmental temperatures collected from the wake state to the sleep state of the CAN network may be obtained, and the plurality of frame environmental temperatures are arranged from front to back according to a time sequence order, so as to obtain the ordered plurality of frame environmental temperatures, for example, an environmental temperature 1, an environmental temperature 2 and an environmental temperature 3 represent 3 frame environmental temperatures from front to back according to the time sequence order.

Further, performing difference processing on the environmental temperature (namely the environmental temperature 3) of the last frame and a preset temperature threshold value to obtain a first temperature difference value; whether the first temperature difference is less than or equal to a preset temperature difference is determined, and if the first temperature difference is less than or equal to the preset temperature difference, the ambient temperature 3 may be determined as an effective ambient temperature of the last frame, and the ambient temperature 3 (e.g., 23 ℃) may be stored.

Optionally, the preset temperature threshold may be obtained from the network by an intelligent terminal in the vehicle to obtain the real-time weather temperature. And, since the CAN network CAN complete the sleep state from the wake state in a very short time (e.g., 1 second), and the weather temperature does not change greatly in 1 second, even the weather temperature may be said to change slightly in 1 second, the preset temperature difference may be set smaller, e.g., 1 ℃ or 0.5 ℃, which is not limited in the embodiment of the present application.

If the first temperature difference is greater than the preset temperature difference, it may be that the acquired ambient temperature 3 deviates, that is, the ambient temperature 3 is an invalid ambient temperature; in order to obtain an effective ambient temperature, difference processing can be performed on an ambient temperature 2 corresponding to a previous frame of the ambient temperature 3 and a preset temperature threshold value to obtain a second temperature difference value; and determining whether the second temperature difference is less than or equal to the preset temperature difference, if the second temperature difference is less than or equal to the preset temperature difference, the ambient temperature 2 may be determined as the effective ambient temperature of the last frame, and the ambient temperature 2 (e.g., 23.6 ℃) may be stored.

If the second temperature difference is greater than the preset temperature difference, the acquired ambient temperature 2 may deviate, that is, the ambient temperature 2 is also an invalid ambient temperature, and the temperature difference between the ambient temperature 1 corresponding to the previous frame of the ambient temperature 2 and the preset temperature threshold may be calculated continuously, and so on until the valid ambient temperature of the last frame is obtained. In other words, the effective ambient temperature of the last frame needs to satisfy the ambient temperature of the frame with the latest acquisition time on the basis that the temperature difference between the acquired ambient temperature and the preset temperature threshold is smaller than or equal to the preset temperature difference.

Optionally, if the number of the collected ineffective ambient temperatures is greater than or equal to a preset number threshold (for example, 5), it is indicated that the function of the air conditioning module in the vehicle for collecting the ambient temperatures is faulty, and/or the function of the CAN network data transmission is faulty, a reminding message of failure in collecting the ambient temperatures CAN be fed back to the user, so that the user CAN repair the vehicle in time.

It should be noted that, when the vehicle is in the driving stage, the air conditioning module may collect the outer surface temperature of the tire in real time or periodically.

Further, when the CAN network is detected to enter the sleep state from the wake state, the stored first ambient temperature may be used as the target ambient temperature.

Or when the CAN network is detected to reenter the wake-up state from the sleep state, the CAN network CAN acquire the target ambient temperature acquired by the air conditioning module, and the acquisition time (which CAN be called as 'preset time') exists, and the CAN network CAN not acquire the target ambient temperature within the acquisition time (for example, 2 seconds), so that the pressure of the tire CAN not be monitored. Therefore, in order to avoid the problem that the CAN network cannot obtain the target environmental temperature within the acquisition duration, the stored first environmental temperature may be used as the target environmental temperature.

Optionally, the preset duration is a required duration for acquiring an ambient temperature according to an air conditioning module in the vehicle and transmitting the acquired ambient temperature to the CAN network. And the preset duration is related to the acquisition speed and the data transmission speed of the air conditioning module in the vehicle, and the vehicle is required to be calibrated in real vehicle, which is not limited by the embodiment of the application.

Optionally, acquiring a target duration of the signal transmission network in a dormant state; if the signal transmission network is detected to enter the sleep state, taking the stored first ambient temperature as the target ambient temperature, including: if the signal transmission network is detected to enter a dormant state and the target duration is smaller than a preset threshold, taking the stored first environment temperature as the target environment temperature.

For example, when the CAN network is detected to enter the sleep state from the wake state, a time counting module (for example, a parking time counting module) in the vehicle may detect a duration (may be referred to as a "target duration") of the CAN network after entering the sleep state, compare the target duration with a preset threshold, and if the target duration is less than the preset threshold, may use the stored first ambient temperature as the target ambient temperature.

However, if the vehicle is in a parking state for a long time, that is, if the CAN network is in a sleep state for too long, the stored first ambient temperature may have a large difference from the current weather temperature corresponding to the time when the CAN network reenters the wake state, if the tire pressure of the tire is still detected by using the first ambient temperature, a false alarm may be caused. Thus, a preset threshold (e.g., 3 days or 7 days) may be set against the target time period, ensuring that the stored first ambient temperature is used as the target ambient temperature when the target time period is less than the preset threshold.

It should be noted that the target duration is related to the use condition of the vehicle by the user, which is not limited in the embodiment of the present application.

In one possible implementation, if the target time length is greater than or equal to a preset threshold value, sending information requesting to collect the current environmental temperature of the vehicle to an air conditioning module in the vehicle; if the current environmental temperature is acquired through the air conditioning module, updating the environmental temperature stored in the vehicle to the current environmental temperature; if the current ambient temperature is not acquired through the air conditioning module, the actual pressure value is not displayed.

For example, if the target time period is greater than or equal to the preset threshold value, it is indicated that the CAN network is continuously in the dormant state for too long, so as to avoid false alarm caused by detecting the tire pressure of the tire by still using the first ambient temperature, the information of requesting to collect the current ambient temperature of the vehicle may be sent to the air conditioning module in the vehicle, so that the air conditioning module may re-collect the current ambient temperature of the environment in which the vehicle is located (i.e. the outer surface temperature of the tire) when receiving the information. If the current ambient temperature CAN be acquired by the air conditioning module, the first ambient temperature stored in the storage module may be updated with the current ambient temperature, i.e., the first ambient temperature (e.g., 23 ℃) stored in the storage module is replaced with the current ambient temperature (e.g., 27 ℃), the storage module currently stores 27 ℃, and the stored 27 ℃ may be transmitted to the CAN network.

For example, if the current ambient temperature cannot be collected by the air conditioning module, it may be indicated that the temperature collection process fails, and in order to avoid displaying the wrong tire pressure to the user, the actual pressure value of the tire may not be displayed to the user; and continuously collecting the current environment temperature through the air conditioning module until the current environment temperature can be collected. However, if the temperature acquisition process fails for multiple times (for example, 5 times), it indicates that the function of the air conditioning module for acquiring the ambient temperature may fail, and the reminding information of the failure of acquiring the ambient temperature may be fed back to the user, so that the user can repair the vehicle in time.

In one possible implementation manner, if the signal transmission network of the vehicle is detected to enter a dormant state, acquiring at least one frame of ambient temperature acquired from an awake state to the dormant state; carrying out average value processing on at least one frame of ambient temperature to obtain a second ambient temperature; storing a second ambient temperature; the acquiring the target environmental temperature of the vehicle includes: if the signal transmission network is detected to enter a dormant state or a preset time length after the signal transmission network enters an awake state, taking the stored second environment temperature as a target environment temperature; the preset time length is obtained according to the time length required by the vehicle to collect the ambient temperature.

For example, when the vehicle is in a parking state, the current states of the air conditioning module and the CAN network CAN be monitored in real time, and when the CAN network is detected to enter a dormant state from a wake-up state, in order to avoid the problem that the tire pressure controller cannot obtain the outer surface temperature of the tire when the CAN network is in the dormant state, and thus cannot monitor the tire pressure of the tire, all the ambient temperatures (which may be referred to as at least one frame of ambient temperature) collected from the wake-up state to the dormant state of the CAN network CAN be obtained, for example, the ambient temperature 4 and the ambient temperature 5; further, the ambient temperature 4 (e.g., 26 ℃) and the ambient temperature 5 (e.g., 26.4 ℃) are subjected to mean processing, a temperature value 26.2 ℃ (which may be referred to as "second ambient temperature") after mean processing is obtained, and the second ambient temperature is stored in a memory module of the vehicle.

Alternatively, the first ambient temperature and the second ambient temperature may be the same or different, and may need to be calculated according to actual situations, which is not limited in the embodiment of the present application.

Further, when the CAN network is detected to enter the sleep state from the wake state, the stored second ambient temperature may be used as the target ambient temperature.

Or when the CAN network is detected to reenter the wake-up state from the sleep state, the target environment temperature cannot be obtained within the preset time (for example, 2 seconds) for acquiring the target environment temperature by the air conditioning module, so that the tire pressure of the tire cannot be monitored. Therefore, in order to avoid the problem that the CAN network cannot obtain the target environmental temperature within the acquisition duration, the stored second environmental temperature may be used as the target environmental temperature.

Optionally, acquiring a target duration of the signal transmission network in a dormant state; if the signal transmission network is detected to enter the sleep state, taking the stored second ambient temperature as the target ambient temperature, including: and if the signal transmission network is detected to enter a dormant state and the target duration is smaller than a preset threshold, taking the stored second environment temperature as the target environment temperature.

When the CAN network is detected to enter the sleep state from the wake state, a parking timing module in the vehicle CAN detect the target time length of the CAN network after entering the sleep state, compare the target time length with a preset threshold value, and if the target time length is smaller than the preset threshold value, take the stored second environmental temperature as the target environmental temperature.

For example, if the target time period is greater than or equal to the preset threshold value, it is indicated that the CAN network is continuously in the sleep state for too long, and in order to avoid false alarm caused by detecting the tire pressure of the tire by still using the second ambient temperature, the information of requesting to collect the current ambient temperature of the vehicle may be sent to the air conditioning module in the vehicle, so that the air conditioning module may re-collect the current ambient temperature when receiving the information. If the current ambient temperature CAN be acquired by the air conditioning module, the second ambient temperature stored in the storage module may be updated with the current ambient temperature, i.e., the second ambient temperature (e.g., 26.2 ℃) stored in the storage module is replaced with the current ambient temperature (e.g., 27 ℃), the storage module currently stores 27 ℃, and the stored 27 ℃ may be transmitted to the CAN network.

S220, obtaining a standard pressure value of the tire based on the target ambient temperature and the internal temperature.

For example, since the vehicle may affect the internal temperature of the tire while in a driving state, and also the target ambient temperature of the vehicle may be obtained when the weather temperature varies, the internal temperature of the tire and the target ambient temperature of the vehicle may affect the PL alarm threshold of the tire pressure. Therefore, in order to avoid the influence of the target environmental temperature of the vehicle and the internal temperature of the tire on the PL alarm threshold value in the tire pressure monitoring process, the current reference pressure value (Pressure Baseline, pbs) of the weather temperature according to the running state of the vehicle may be calculated by the target environmental temperature of the vehicle and the internal temperature of the tire first, and may be referred to as a "standard pressure value". In other words, the standard pressure value is temperature compensated.

In a possible implementation manner, the obtaining the standard pressure value of the tire based on the target ambient temperature and the internal temperature includes: multiplying the internal temperature by a first preset pressure value to obtain a first numerical value; dividing the first value by the target ambient temperature to obtain a second value; and subtracting the second preset pressure value from the second numerical value to obtain a standard pressure value.

Wherein the first preset pressure value is obtained by a second preset pressure value (e.g., standard atmospheric pressure) and a preset tire parameter, the preset tire parameter being associated with an attribute of the tire.

Alternatively, the first preset pressure value is obtained by combining the Prec and the standard atmospheric pressure, for example, the first preset pressure value=prec+the standard atmospheric pressure. And, the standard atmospheric pressure is related to a location area where the vehicle is located, for example, altitude, atmospheric temperature, and atmospheric density, etc., which are not limited by the embodiment of the present application.

For example, the internal temperature of the tire may be multiplied by a first preset pressure value to obtain a first value; dividing the first value by the target environmental temperature of the vehicle to obtain a second value; and finally, subtracting a second preset pressure value from the second value to obtain a standard pressure value. The calculation process for calculating Pbs is converted into a formula to obtain the following steps:

Pbs= (prec+normal atmospheric pressure) ×internal temperature/target ambient temperature-normal atmospheric pressure.

S230, obtaining an early warning pressure value of the tire based on the standard pressure value.

Illustratively, pbs calculated in S220 may be taken into the formula: the PL alarm threshold value is less than or equal to a preset coefficient XPbs-preset parameter, so that the PL alarm threshold value is calculated.

For example, referring to the representation of PL alarm pressure values (which may be referred to as "pre-alarm pressure values") of national regulation GB 26149: the PL alarm threshold value is less than or equal to 75 percent multiplied by Prec-7Kpa, the preset coefficient can be set to 75 percent, and the preset parameter is set to 7Kpa, so that the calculation formula of the PL alarm threshold value is obtained: PL alarm threshold value is less than or equal to 75 percent of XPbs-7 Kpa.

Alternatively, the preset coefficients and preset parameters may also be used for real-vehicle calibration according to different tire pressure early warning requirements, road environments, vehicle types, and the like, which is not limited by the embodiment of the present application.

It should be noted that, because national regulations prescribe that the warning is only carried out when the tire pressure is too low, the application only sets the PL early warning threshold value; however, in practice, a High Pressure (PH) early warning threshold may be calculated by the standard Pressure value, for example, the PH alarm threshold is less than or equal to a preset coefficient×pbs+a preset parameter; and when the preset coefficient is set to 75%, and the preset parameter is set to 7Kpa, the PH alarm threshold value is less than or equal to 75% multiplied by Pbs+7Kpa, so that the situation that the vehicle tire pressure is too high to increase the load born by the vehicle in the running process is avoided, and the loss of the vehicle in the running process is reduced.

S240, determining whether to output the early warning information based on the early warning pressure value and the actual pressure and the force value.

For example, in the process of monitoring the tire pressure, whether to output the early warning information to the user may be determined according to the magnitude relation between the early warning pressure value and the actual pressure value of the tire.

Optionally, the mode of outputting the early warning information includes, but is not limited to, one or more of voice early warning, short message early warning, vehicle whistling early warning and flashing light early warning.

In the method 200 shown in fig. 2, since the tire pressure of the tire in the vehicle may be affected by the running state of the vehicle and/or the weather temperature, if the tire pressure of the tire is pre-warned by using a fixed pre-warning pressure value, a deviation may occur when determining whether the tire pressure is abnormal, so as to miswarn the user. Therefore, the application introduces the environment temperature of the vehicle (namely the target environment temperature) and the internal environment temperature of the tire in the process of calculating the early warning pressure value of the tire, so that the early warning pressure value can be adjusted on the basis of the running state of the vehicle or the change of the weather temperature, thereby leading the early warning pressure value to be more in line with the current running state and the environment of the vehicle, reducing the possibility of false alarm to the user and improving the accuracy of the early warning of the tire pressure.

Optionally, the determining whether to output the early warning information based on the early warning pressure value and the actual pressure value includes: and if the actual pressure value is smaller than or equal to the early warning pressure value, outputting early warning information.

For example, if the magnitude relation between the early warning pressure value and the actual pressure value of the tire is compared, the actual pressure value is smaller than or equal to the early warning pressure value, which indicates that the current tire pressure of the tire is too low, and the tire may heat and burst when the vehicle runs at a high speed, so that a larger potential safety hazard is caused, and in order to ensure the safety of the use of the vehicle, early warning information of "low tire pressure" can be output to the user in a voice early warning mode, so that the user can stop the vehicle in time or maintain the vehicle.

Optionally, when the actual pressure value is detected to be less than or equal to the early warning pressure value, a prompt message specific to which tire is too low in tire pressure can be sent to the user. For example, if the tire pressure of the left front tire of the vehicle is too low, a prompt message of "the tire pressure of the left front tire is too low" can be output to the user in a voice early warning manner.

Alternatively, the pressure of the tire may be continuously monitored when the actual pressure value is detected to be greater than the warning pressure value.

Illustratively, as shown in FIG. 3, the method 300 includes the following implementation:

S301, judging whether a signal transmission network of the vehicle enters a dormant state. If yes, executing S302 or S304; if not, execution continues with S301.

For example, when the vehicle is in a parking state (i.e., the vehicle speed is 0), the current states of the air conditioning module and the CAN network may be monitored in real time, to determine whether the CAN network enters a sleep state from an awake state.

S302, acquiring a first ambient temperature acquired by the signal transmission network from an awake state to a sleep state.

For example, if the judgment in S301 indicates that the CAN network enters the sleep state from the awake state, the first ambient temperature collected by the CAN network from the awake state to the sleep state may be obtained.

For example, if it is determined in S301 that the CAN network is continuously in the awake state and does not enter the sleep state, S301 may be continuously executed to continuously determine whether the signal transmission network of the vehicle enters the sleep state.

S303, storing the first ambient temperature.

Illustratively, the first ambient temperature collected at S302 is stored.

S304, acquiring at least one frame of ambient temperature acquired by the signal transmission network from the awakening state to the dormant state.

For example, if it is determined in S301 that the CAN network enters the sleep state from the awake state, all the ambient temperatures, for example, ambient temperature 4 and ambient temperature 5, collected by the CAN network from the awake state to the sleep state may be obtained.

It should be noted that, S302 and S304 are parallel schemes, and in the embodiment of the present application, S302 or S304 may be selected to be executed.

S305, carrying out mean value processing on at least one frame of ambient temperature to obtain a second ambient temperature.

Illustratively, ambient temperature 4 (e.g., 26 ℃) and ambient temperature 5 (e.g., 26.4 ℃) are averaged to provide an averaged temperature value of 26.2 ℃.

S306, storing the second ambient temperature.

Illustratively, the second ambient temperature calculated at S305 is stored at 26.2 ℃.

S307, judging whether the target duration of the signal transmission network in the dormant state is smaller than a preset threshold. If yes, executing S308 or S309; if not, then S315 is performed.

When the CAN network is detected to enter the dormant state from the wake-up state, the parking timing module in the vehicle CAN detect the target time length of the CAN network after entering the dormant state, and judge whether the target time length is smaller than a preset threshold value or not.

And S308, taking the stored first ambient temperature as a target ambient temperature.

For example, if the target duration is less than the preset threshold value through S307, the stored first ambient temperature may be used as the target ambient temperature.

S309, taking the stored second ambient temperature as the target ambient temperature.

For example, if the target duration is less than the preset threshold value, the stored second ambient temperature may be used as the target ambient temperature in S307.

It should be noted that S308 and S309 are parallel schemes, and in the embodiment of the present application, S308 or S309 may be selected and executed, and S308 corresponds to S303 and S309 corresponds to S306.

S310, acquiring the internal temperature and the actual pressure value of the tire.

For example, the internal temperature of the tire may be detected by a temperature sensor, and the actual pressure value of the tire may be detected by a pressure sensor.

Alternatively, S310 may be executed in any of the processes from S301 to S309, or may be executed before S301, that is, before S311 is executed, the target ambient temperature of the vehicle, the internal temperature of the tire, and the actual pressure value of the tire may be obtained, and the execution sequence of S310 is not limited in the present application.

S311, obtaining a standard pressure value of the tire based on the target ambient temperature and the internal temperature.

For example, pbs, which is a weather temperature conforming to the running state of the vehicle, may be calculated first from the target ambient temperature of the vehicle and the internal temperature of the tire, for example, pbs= (prec+standard atmospheric pressure) ×internal temperature/target ambient temperature-standard atmospheric pressure.

S312, obtaining an early warning pressure value of the tire based on the standard pressure value.

By way of example, referring to the representation of the PL alarm pressure value of national regulation GB 26149, the PL alarm pressure value of the tire can be calculated according to the Pbs calculated in S311, namely the PL alarm threshold value is less than or equal to 75% of x Pbs-7Kpa.

S313, judging whether the actual pressure value is smaller than or equal to the early warning pressure value. If yes, executing S314; if not, S301 is performed.

For example, in the process of monitoring the tire pressure, it may be determined whether the actual pressure value of the tire is smaller than the warning pressure value.

S314, outputting early warning information.

For example, if the actual pressure value of the tire obtained in S313 is less than or equal to the pre-warning pressure value, the pre-warning information of "too low tire pressure" may be output to the user by means of voice pre-warning.

Alternatively, the tire pressure of the tire may be continuously monitored when the actual pressure value of the tire is detected to be greater than the warning pressure value and less than the PH warning pressure value.

For example, if it is determined in S313 that the actual pressure value of the tire is greater than the pre-warning pressure value, S301 may be continuously performed to continuously determine whether the signal transmission network of the vehicle enters the sleep state.

S315, information requesting to collect the current ambient temperature of the vehicle is sent to an air conditioning module in the vehicle.

For example, if the target time period obtained in S307 is greater than or equal to the preset threshold, which indicates that the CAN network is continuously in the sleep state for too long, in order to avoid false alarm caused by detecting the tire pressure of the tire by still using the first ambient temperature, the information of requesting to collect the current ambient temperature of the vehicle may be sent to the air conditioning module in the vehicle, so that the air conditioning module may re-collect the current ambient temperature of the environment in which the vehicle is located when receiving the information.

S316, judging whether the air conditioning module collects the current environment temperature. If yes, executing S317; if not, S318 is performed.

Illustratively, when the air conditioning module collects a current ambient temperature of the environment in which the vehicle is located. It may be determined whether the air conditioning mode is capable of capturing the current ambient temperature.

S317, updating the environment temperature stored in the vehicle to the current environment temperature, and taking the current environment temperature as the target environment temperature.

For example, if the current environmental temperature of the environment in which the vehicle is located can be collected by the air conditioning module through S316, the first environmental temperature stored in the storage module may be updated using the current environmental temperature.

Further, after updating the first ambient temperature stored in the storage module with the current ambient temperature, S310 may be continuously performed with the current ambient temperature stored in the storage module as the target ambient temperature, to obtain the internal temperature of the tire of the vehicle and the actual pressure value of the tire.

S318, the actual pressure value is not displayed.

For example, if the current ambient temperature cannot be collected by the air conditioning module as obtained in S316, it may be explained that the temperature collection process fails, and the actual pressure value of the tire may not be displayed to the user in order to avoid displaying the wrong tire pressure to the user.

It should be noted that, all the steps in fig. 3 are described in detail in the corresponding embodiment of fig. 2, and are not described herein.

It should be understood that the above description is intended to aid those skilled in the art in understanding the embodiments of the present application, and is not intended to limit the embodiments of the present application to the specific values or particular scenarios illustrated. It will be apparent to those skilled in the art from the foregoing description that various equivalent modifications or variations can be made, and such modifications or variations are intended to be within the scope of the embodiments of the present application.

The method for early warning the tire pressure provided by the embodiment of the application is described in detail above with reference to fig. 1 to 3; an embodiment of the device of the present application will be described in detail with reference to fig. 4 and 5. It should be understood that the apparatus in the embodiments of the present application may perform the methods of the foregoing embodiments of the present application, that is, specific working procedures of the following various products may refer to corresponding procedures in the foregoing method embodiments.

Illustratively, as shown in FIG. 4, the apparatus 400 is configured in a vehicle, the vehicle including a tire therein, the apparatus 400 comprising:

the acquisition module 410: for acquiring a target ambient temperature of the vehicle, an internal temperature of the tire, and an actual pressure value of the tire;

The first processing module 420: the method comprises the steps of obtaining a standard pressure value of a tire based on a target ambient temperature and an internal temperature;

The second processing module 430 is configured to obtain an early warning pressure value of the tire based on the standard pressure value;

Determination module 450: and the early warning device is used for determining whether to output early warning information based on the early warning pressure value and the actual pressure value.

In a possible implementation manner, the obtaining module 410 is further configured to: if the signal transmission network of the vehicle is detected to enter a dormant state, acquiring a first environment temperature acquired from an awake state to the dormant state; the first ambient temperature is the effective ambient temperature of the last frame acquired from the awakening state to the dormant state; storing a first ambient temperature; the obtaining module 410 is specifically configured to: if the signal transmission network is detected to enter a dormant state or a preset time length after the signal transmission network enters an awake state, taking the stored first environment temperature as a target environment temperature; the preset time length is obtained according to the time length required by the vehicle to collect the ambient temperature.

In a possible implementation manner, the obtaining module 410 is further configured to: acquiring a target duration of a signal transmission network in a dormant state; the obtaining module 410 is specifically configured to: if the signal transmission network is detected to enter a dormant state and the target duration is smaller than a preset threshold, taking the stored first environment temperature as the target environment temperature.

In a possible implementation manner, the obtaining module 410 is further configured to: if the signal transmission network of the vehicle is detected to enter a dormant state, acquiring at least one frame of ambient temperature acquired from an awake state to the dormant state; carrying out average value processing on at least one frame of ambient temperature to obtain a second ambient temperature; storing a second ambient temperature; the obtaining module 410 is specifically configured to: if the signal transmission network is detected to enter a dormant state or a preset time length after the signal transmission network enters an awake state, taking the stored second environment temperature as a target environment temperature; the preset time length is obtained according to the time length required by the vehicle to collect the ambient temperature.

In a possible implementation manner, the obtaining module 410 is further configured to: acquiring a target duration of a signal transmission network in a dormant state; the obtaining module 410 is specifically configured to: and if the signal transmission network is detected to enter a dormant state and the target duration is smaller than a preset threshold, taking the stored second environment temperature as the target environment temperature.

In a possible implementation manner, the obtaining module 410 is further configured to: if the target time length is greater than or equal to a preset threshold value, sending information for requesting to collect the current environmental temperature of the vehicle to an air conditioning module in the vehicle; if the current environmental temperature is acquired through the air conditioning module, updating the environmental temperature stored in the vehicle to the current environmental temperature; if the current ambient temperature is not acquired through the air conditioning module, the actual pressure value is not displayed.

In one possible implementation, the first processing module 420 is specifically configured to: multiplying the internal temperature by a first preset pressure value to obtain a first numerical value; dividing the first value by the target ambient temperature to obtain a second value; subtracting a second preset pressure value from the second numerical value to obtain a standard pressure value; the first preset pressure value is obtained through the second preset pressure value and preset tire parameters, and the preset tire parameters are related to the attributes of the tire.

In one possible implementation, the determining module 450 is specifically configured to: and if the actual pressure value is smaller than or equal to the early warning pressure value, outputting early warning information.

It should be noted that the above-mentioned apparatus 400 is embodied in the form of a functional module. The term "module" herein may be implemented in software and/or hardware, and is not specifically limited thereto.

For example, a "module" may be a software program, a hardware circuit, or a combination of both that implements the functionality described above. The hardware circuitry may comprise Application Specific Integrated Circuits (ASICs), electronic circuits, processors (e.g., shared, proprietary, or group processors, etc.) and memory for executing one or more software or firmware programs, merged logic circuits, and/or other suitable components that support the described functions.

Thus, the modules of the examples described in the embodiments of the present application can be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

For example, as shown in fig. 5, the vehicle 500 includes: the tire pressure warning device comprises a memory 510 and a processor 520, wherein executable program codes 5101 are stored in the memory 510, and the processor 520 is used for calling and executing the executable program codes 5101 to execute a tire pressure warning method.

The present application may divide the functional modules of the vehicle according to the above method example, for example, each functional module may be corresponding to the vehicle, or two or more functions may be integrated into one processing module, where the integrated modules may be implemented in a hardware form. It should be noted that, in this embodiment, the division of the modules is schematic, only one logic function is divided, and another division manner may be implemented in actual implementation.

In the case of dividing each function module with corresponding each function, the vehicle may include: the device comprises an acquisition module, a first processing module, a second processing module, a determination module and the like. It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

The vehicle provided by the application is used for executing the method for early warning the tire pressure, so that the same effect as that of the implementation method can be achieved.

In case an integrated unit is employed, the vehicle may comprise a processing module, a memory module. The processing module can be used for controlling and managing the actions of the vehicle. The memory module may be used to support the vehicle in executing, inter alia, program code and data.

Wherein a processing module may be a processor or controller that may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the present disclosure. A processor may also be a combination of computing functions, including for example one or more microprocessors, digital Signal Processing (DSP) and microprocessor combinations, etc., and a memory module may be a memory.

The application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the method of any of the previous embodiments. The computer readable storage medium may include, among other things, any type of disk including floppy disks, optical disks, DVDs (Digital Video Disc, digital versatile disks), CD-ROMs (Compact Disc Read-Only Memory), microdrives, and magneto-optical disks, ROMs (Read-Only Memory), RAMs (Random Access Memory, random access memories), EPROMs (Erasable Programmable Read-Only Memory), EEPROMs (ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY, electrically erasable programmable Read-Only Memory), DRAMs (Dynamic Random Access Memory ), VRAMs (Video Random Access Memory, video random access Memory), flash Memory devices, magnetic or optical cards, nanosystems (including molecular Memory ICs), or any type of media or device suitable for storing instructions and/or data.

The present application also provides a computer program product, which when run on a computer, causes the computer to perform the above-mentioned related steps to implement a method for tire pressure warning in the above-mentioned embodiments.

In addition, the vehicle provided by the embodiment of the application can be a chip, a component or a module, and the vehicle can comprise a processor and a memory which are connected; the memory is used for storing instructions, and the processor can call and execute the instructions when the vehicle runs, so that the chip executes the method for warning the tire pressure in the embodiment.

The vehicle, the computer readable storage medium, the computer program product or the chip provided by the present application are used for executing the corresponding method provided above, and therefore, the advantages achieved by the present application may refer to the advantages in the corresponding method provided above, and will not be described herein.

It will be appreciated by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A method of tire pressure warning for a vehicle including a tire therein, the method comprising:

acquiring a target ambient temperature of the vehicle, an internal temperature of the tire, and an actual pressure value of the tire;

obtaining a standard pressure value of the tire based on the target ambient temperature and the internal temperature;

based on the standard pressure value, obtaining an early warning pressure value of the tire;

and determining whether to output early warning information or not based on the early warning pressure value and the actual pressure value.

2. The method according to claim 1, wherein the method further comprises:

if the signal transmission network of the vehicle is detected to enter a dormant state, acquiring a first environment temperature acquired from an awake state to the dormant state of the signal transmission network; wherein the first ambient temperature is an effective ambient temperature of a last frame acquired from the awake state to the sleep state;

Storing the first ambient temperature;

The acquiring the target environmental temperature of the vehicle includes:

if the signal transmission network is detected to enter the dormant state or a preset time length after the signal transmission network enters the awakening state, taking the stored first environment temperature as the target environment temperature;

the preset time length is obtained according to the time length required by the vehicle to collect the ambient temperature.

3. The method according to claim 2, wherein the method further comprises:

acquiring a target duration of the signal transmission network in the dormant state;

and if the signal transmission network is detected to enter the dormant state, taking the stored first environment temperature as the target environment temperature, including:

And if the signal transmission network is detected to enter the dormant state and the target duration is smaller than a preset threshold, taking the stored first environment temperature as the target environment temperature.

4. The method according to claim 1, wherein the method further comprises:

If the signal transmission network of the vehicle is detected to enter a dormant state, acquiring at least one frame of ambient temperature acquired from an awake state to the dormant state of the signal transmission network;

Performing average value processing on the at least one frame of ambient temperature to obtain a second ambient temperature;

Storing the second ambient temperature;

The acquiring the target environmental temperature of the vehicle includes:

if the signal transmission network is detected to enter the dormant state or a preset time length after the signal transmission network enters the awakening state, taking the stored second environment temperature as the target environment temperature;

5. The method according to claim 4, wherein the method further comprises:

and if the signal transmission network is detected to enter the dormant state, taking the stored second environment temperature as the target environment temperature, including:

And if the signal transmission network is detected to enter the dormant state and the target duration is smaller than a preset threshold, taking the stored second environment temperature as the target environment temperature.

6. The method according to claim 3 or 5, characterized in that the method further comprises:

If the target time length is greater than or equal to the preset threshold value, sending a request to acquire information of the current environment temperature of the vehicle to an air conditioning module in the vehicle;

if the current environmental temperature is acquired through the air conditioning module, updating the environmental temperature stored in the vehicle to the current environmental temperature;

and if the current ambient temperature is not acquired through the air conditioning module, not displaying the actual pressure value.

7. The method according to any one of claims 1 to 5, wherein said deriving a standard pressure value for said tyre based on said target ambient temperature and said internal temperature comprises:

Multiplying the internal temperature by a first preset pressure value to obtain a first numerical value;

Obtaining a second value by dividing the first value by the target ambient temperature;

subtracting a second preset pressure value from the second value to obtain the standard pressure value;

the first preset pressure value is obtained through the second preset pressure value and a preset tire parameter, and the preset tire parameter is associated with the attribute of the tire.

8. The method according to any one of claims 1 to 5, wherein the determining whether to output the warning information based on the warning pressure value and the actual pressure value includes:

And if the actual pressure value is smaller than or equal to the early warning pressure value, outputting the early warning information.

9. A tire pressure warning device configured in a vehicle including a tire therein, the device comprising:

an acquisition module for acquiring a target ambient temperature of the vehicle, an internal temperature of the tire, and an actual pressure value of the tire;

a first processing module for obtaining a standard pressure value of the tire based on the target ambient temperature and the internal temperature;

the second processing module is used for obtaining an early warning pressure value of the tire based on the standard pressure value;

and the determining module is used for determining whether to output the early warning information or not based on the early warning pressure value and the actual pressure value.

10. A vehicle, characterized in that the vehicle comprises:

a memory for storing executable program code;

A processor for calling and running the executable program code from the memory, causing the vehicle to perform the method of any one of claims 1 to 8.