Vehicle tire pressure monitoring method, vehicle-mounted controller, system and vehicle

Abstract

The invention discloses a vehicle tire pressure monitoring method, a vehicle-mounted controller, a system and a vehicle. The method comprises the following steps: acquiring actually measured tire pressure data corresponding to a first wheel and actually measured wheel data corresponding to four wheels; determining a target tire pressure conversion relation according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the four wheels; processing the actually measured tire pressure data corresponding to the first wheel or the actually measured wheel data corresponding to the second wheel by adopting the target tire pressure conversion relation, and determining target tire pressure data corresponding to the second wheel; the second wheel is a wheel except the first wheel. According to the method, the tire pressure data of each wheel does not need to be monitored in real time through hardware equipment, the hardware cost is saved, the actually measured tire pressure data corresponding to the first wheel is adopted as the reference datum, the target tire pressure conversion relation is determined, the target tire pressure data corresponding to the second wheel is obtained, the target tire pressure data can be more accurate, and the tire pressure detection efficiency is improved. And the safety performance of the tire pressure is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a tire pressure monitoring method, a vehicle-mounted controller, a system and a vehicle. Background Art

[0002] In order to monitor the tire pressure of the vehicle, the following two solutions are generally adopted: the first is direct tire pressure monitoring, that is, an independent tire pressure sensor is installed on each wheel to monitor the tire pressure data corresponding to each wheel. This method requires four separate tire pressure sensors. An independent tire pressure sensor is installed on each wheel, which has high requirements for hardware equipment and requires high tire pressure monitoring costs. The second is indirect tire pressure monitoring, that is, the wheel speed sensor of the existing ESP (Electronic Stability Program) system of the vehicle is used to collect the wheel speed signal in real time, and the wheel speed difference is calculated through the controller. The tire pressure condition is estimated based on the principle that the rolling radius is small when the tire pressure is low, so the tire speed becomes high. When the wheel speed difference of one of the four wheels is greater than a certain set threshold, it is considered that the tire pressure is too low, and the controller transmits the alarm signal to the car instrument to alarm. This method does not have the measured tire pressure data as a reference benchmark, and there is no accurate reference benchmark. It only compares and estimates the tire pressure of the four wheels, which has low accuracy. Even in some working conditions, such as the working condition where the tire pressure of all four wheels is too low, there is a problem of underreporting, which poses a safety hazard.

[0003] Therefore, how to monitor the tire pressure more accurately and at a lower cost is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present invention provide a tire pressure monitoring method, a vehicle-mounted controller, a system and a vehicle to solve the problem of how to monitor the tire pressure more accurately and at a lower cost.

[0005] A tire pressure monitoring method, comprising:

[0006] Obtaining measured tire pressure data corresponding to the first wheel and measured wheel data corresponding to the four wheels;

[0007] Determining a target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels;

[0008] The target tire pressure conversion relationship is used to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel; the second wheel is a wheel other than the first wheel.

[0009] Preferably, determining the target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels includes:

[0010] determining a first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel;

[0011] Preferably, the adopting the target tire pressure conversion relationship to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel includes:

[0012] The target tire pressure data corresponding to the second wheel is determined according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship.

[0013] Preferably, determining the first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel includes:

[0014] determining first estimated tire pressure data corresponding to the first wheel according to the measured wheel data corresponding to the first wheel;

[0015] A first tire pressure conversion relationship is determined according to the measured tire pressure data corresponding to the first wheel and the first estimated tire pressure data corresponding to the first wheel.

[0016] Preferably, determining the target tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship includes:

[0017] determining second estimated tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel;

[0018] The target tire pressure data corresponding to the second wheel is determined according to the second estimated tire pressure data corresponding to the second wheel and the first tire pressure conversion relationship.

[0019] Preferably, the measured wheel data includes a first measured wheel speed and a first measured angular velocity corresponding to the first wheel;

[0020] Preferably, determining the first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel includes:

[0021] determining a first tire radius of the first wheel according to a first measured wheel speed and a first measured angular velocity corresponding to the first wheel;

[0022] A first tire pressure conversion relationship is determined according to the actually measured tire pressure data corresponding to the first wheel and a first tire radius of the first wheel.

[0023] Preferably, the measured wheel data further includes a second measured wheel speed and a second measured angular velocity corresponding to the second wheel;

[0024] Preferably, determining the target tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship includes:

[0025] determining a second tire radius corresponding to the second wheel according to a second measured wheel speed and a second measured angular velocity corresponding to the second wheel;

[0026] The target tire pressure data corresponding to the second wheel is determined according to a conversion relationship between a second tire radius corresponding to the second wheel and the first tire pressure.

[0027] Preferably, determining the target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels includes:

[0028] determining a second tire pressure conversion relationship according to the actually measured wheel data corresponding to the first wheel and the actually measured wheel data corresponding to the second wheel;

[0029] Preferably, the adopting the target tire pressure conversion relationship to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel includes:

[0030] The target tire pressure data corresponding to the second wheel is determined according to the measured tire pressure data corresponding to the first wheel and the second tire pressure conversion relationship.

[0031] A vehicle-mounted controller comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned vehicle tire pressure monitoring method is implemented.

[0032] A tire pressure monitoring system includes the above-mentioned vehicle-mounted controller, a tire pressure sensor, and a data monitoring sensor. The tire pressure sensor is arranged on a first wheel to obtain the actual tire pressure data of the first wheel; the data monitoring sensors are respectively arranged on four wheels to obtain the actual wheel data corresponding to the four wheels; the vehicle-mounted controller is respectively connected to the tire pressure sensor and the data monitoring sensor to implement the above-mentioned vehicle tire pressure monitoring method.

[0033] A car comprises the above tire pressure monitoring system.

[0034] The above-mentioned tire pressure monitoring method, vehicle-mounted controller, system and automobile determine the target tire pressure conversion relationship based on the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels, and use the measured tire pressure data corresponding to the first wheel as a reference benchmark to obtain a more accurate target tire pressure conversion relationship. The target tire pressure conversion relationship is used to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel. There is no need to monitor the tire pressure data of each wheel in real time through hardware equipment, which saves hardware costs. In addition, the measured tire pressure data corresponding to the first wheel is used as a reference benchmark to determine the target tire pressure conversion relationship and obtain the target tire pressure data corresponding to the second wheel, which can make the obtained target tire pressure data corresponding to the second wheel more accurate and improve the safety performance of the tire pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0036] Figure 1 is a flow chart of a tire pressure monitoring method according to an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 A flowchart of an embodiment of the present invention;

[0038] Figure 3 yes Figure 2 A flowchart of an embodiment of step S202;

[0039] Figure 4 yes Figure 2 A flowchart of an embodiment of step S203;

[0040] Figure 5 yes Figure 2 A flowchart of another embodiment of step S202;

[0041] Figure 6 yes Figure 2 A flowchart of another embodiment of step S203;

[0042] Figure 7 yes Figure 1 A flowchart of another embodiment of the present invention;

[0043] Figure 8 yes Figure 7 A flowchart of an embodiment of step S703;

[0044] Fig. 9 yes Figure 1 A flowchart of an embodiment after step S103;

[0045] Fig.10 Schematic diagram of a vehicle-mounted controller according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] An embodiment of the present invention provides a tire pressure monitoring method. Specifically, the tire pressure monitoring method is used to solve the problem of how to monitor the tire pressure more accurately and at a lower cost.

[0048] In one embodiment, if Figure 1 As shown, a tire pressure monitoring method is provided, and the method is applied in Fig.10 The vehicle controller in the example is used to illustrate the process, including the following steps:

[0049] S101: Acquire measured tire pressure data corresponding to the first wheel and measured wheel data corresponding to the four wheels;

[0050] S102: determining a target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels;

[0051] S103: using the target tire pressure conversion relationship, processing the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel;

[0052] The second wheel is a wheel other than the first wheel.

[0053] The measured tire pressure data refers to the tire pressure data of the wheels actually monitored, specifically the tire pressure data of the wheels actually monitored by the tire pressure sensor. The measured wheel data refers to the data of each wheel actually monitored during driving, specifically at least one wheel data actually monitored by the data monitoring sensor, such as wheel angular velocity and wheel speed. The first wheel refers to the only wheel among the four wheels that can directly monitor the measured tire pressure data; accordingly, the wheels other than the first wheel among the four wheels are determined as the second wheels.

[0054] As an example, in step S101, the vehicle-mounted controller can receive the measured wheel data actually monitored during the driving process of the four wheels sent by the data monitoring sensor, and obtain the measured tire pressure data corresponding to the first wheel sent by the tire pressure sensor. The measured wheel data here include the measured wheel data corresponding to the first wheel and the measured wheel data corresponding to the second wheel, which is convenient for subsequently determining the target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels.

[0055] The target tire pressure conversion relationship is a conversion relationship required for determining the target tire pressure data corresponding to the second wheel according to the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel. The target tire pressure data is the tire pressure data of the second wheel calculated according to the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel.

[0056] As an example, in step S102, after obtaining the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels, the onboard controller determines the target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels. In one embodiment, the onboard controller can determine the target tire pressure conversion relationship between the measured tire pressure data corresponding to the first wheel and the target tire pressure data corresponding to the second wheel according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels; it can also determine the target tire pressure conversion relationship between the measured wheel data corresponding to the second wheel and the target tire pressure data corresponding to the second wheel according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels. In this example, the target tire pressure conversion relationship is determined according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels, and the measured tire pressure data corresponding to the first wheel is used as a reference benchmark, so that a more accurate target tire pressure conversion relationship can be obtained.

[0057] As an example, in step S103, when the onboard controller determines that the target tire pressure conversion relationship is a conversion relationship for determining the target tire pressure data corresponding to the second wheel based on the measured tire pressure data corresponding to the first wheel, the onboard controller uses the target tire pressure conversion relationship to process the measured tire pressure data corresponding to the first wheel to obtain the target tire pressure data corresponding to the second wheel. Alternatively, when the onboard controller determines that the target tire pressure conversion relationship is a conversion relationship for determining the target tire pressure data corresponding to the second wheel based on the measured wheel data corresponding to the second wheel, the onboard controller uses the target tire pressure conversion relationship to process the measured wheel data corresponding to the second wheel to obtain the target tire pressure data corresponding to the second wheel. In this example, after obtaining the target tire pressure conversion relationship, the on-board controller uses the target tire pressure conversion relationship to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel, and determines the target tire pressure data corresponding to the second wheel. There is no need to monitor the tire pressure data of all wheels in real time through hardware equipment, thus saving hardware costs. In addition, the measured tire pressure data corresponding to the first wheel is used as a reference benchmark to determine the target tire pressure conversion relationship and obtain the target tire pressure data corresponding to the second wheel, thereby ensuring the accuracy of the target tire pressure data corresponding to the second wheel and improving the safety performance of the tire pressure of the vehicle.

[0058] In this embodiment, the target tire pressure conversion relationship is determined based on the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels, and the measured tire pressure data corresponding to the first wheel is used as a reference benchmark to obtain a more accurate target tire pressure conversion relationship. The target tire pressure conversion relationship is used to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel. There is no need to monitor the tire pressure data of all wheels in real time through hardware equipment, which saves hardware costs. In addition, the measured tire pressure data corresponding to the first wheel is used as a reference benchmark to determine the target tire pressure conversion relationship and obtain the target tire pressure data corresponding to the second wheel, which can make the obtained target tire pressure data corresponding to the second wheel more accurate and improve the safety performance of the tire pressure.

[0059] In one embodiment, if Figure 2 As shown, a tire pressure monitoring method is provided, which is described by taking the application of the method in a vehicle controller as an example, and includes the following steps:

[0060] S201: Acquire measured tire pressure data corresponding to the first wheel and measured wheel pressure data corresponding to the four wheels;

[0061] S202: determining a first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel;

[0062] S203: Determine the target tire pressure data corresponding to the second wheel according to the actually measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship.

[0063] Among them, step S201 is the same as step S101 and will not be repeated; step S202 is a specific implementation of step S102, and step S203 is a specific implementation of step S103.

[0064] Among them, the first tire pressure conversion relationship refers to determining the conversion relationship between the measured tire pressure data and the measured wheel data corresponding to the same wheel, which is a type of target tire pressure conversion relationship.

[0065] As an example, in step S202, the onboard controller calibrates the measured tire pressure data corresponding to the first wheel according to the measured wheel data corresponding to the first wheel, obtains a calibration relationship, and determines the calibration relationship as the first tire pressure conversion relationship. In this example, the first tire pressure conversion relationship is determined according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the first wheel, and the measured tire pressure data is used as a reference for determining the first tire pressure conversion relationship, so that the determined first tire pressure conversion relationship can be more accurate.

[0066] As an example, in step S203, since the first tire pressure conversion relationship is a conversion relationship between the measured tire pressure data and the measured wheel data of the same wheel, after obtaining the measured wheel data of the second wheel, the onboard controller uses the first tire pressure conversion relationship to convert the measured wheel data corresponding to the second wheel to obtain the target tire pressure data corresponding to the second wheel. In this example, after obtaining a relatively accurate first tire pressure conversion relationship, more accurate target tire pressure data corresponding to the second wheel can be obtained based on the first tire pressure conversion relationship and the measured wheel data corresponding to the second wheel.

[0067] In this embodiment, the measured tire pressure data of the first wheel is used as a reference basis for determining the first tire pressure conversion relationship, so as to obtain a more accurate first tire pressure conversion relationship. Based on the more accurate first tire pressure conversion relationship and the measured wheel data corresponding to the second wheel, more accurate target tire pressure data corresponding to the second wheel can be obtained. In addition, this method does not require tire pressure monitoring of the second wheel through hardware equipment, which can save hardware costs.

[0068] In one embodiment, if Figure 3 As shown, step S202, i.e., determining a first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel, includes:

[0069] S301: determining first estimated tire pressure data corresponding to the first wheel according to measured wheel data corresponding to the first wheel;

[0070] S302: Determine a first tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the first estimated tire pressure data corresponding to the first wheel.

[0071] The first estimated tire pressure data refers to the tire pressure data of the first wheel estimated based on the actually measured wheel data corresponding to the first wheel.

[0072] As an example, in step S301, the vehicle controller estimates the tire pressure of the first wheel according to the measured wheel data corresponding to the first wheel, and obtains the first estimated tire pressure data corresponding to the first wheel. For example, an existing tire pressure estimation algorithm can be used to process the input parameter of the measured wheel data corresponding to the first wheel to determine the first estimated tire pressure data corresponding to the first wheel. In this example, the first estimated tire pressure data corresponding to the first wheel is obtained to facilitate the subsequent determination of the first tire pressure conversion relationship according to the first estimated tire pressure data.

[0073] As an example, in step S302, the on-board controller compares and calculates the measured tire pressure data corresponding to the first wheel and the first estimated tire pressure data corresponding to the first wheel to determine the first tire pressure conversion relationship. In this example, the on-board controller compares the first estimated tire pressure data of the first wheel with the measured tire pressure data of the first wheel to determine the conversion relationship between the measured tire pressure data of the first wheel and the first estimated tire pressure data, and determines the conversion relationship as the first tire pressure conversion relationship. The first tire pressure conversion relationship here is the conversion relationship between the measured tire pressure data of the same wheel and the estimated tire pressure data corresponding to the measured wheel data, which can be understood as the conversion relationship between the two tire pressure data. In this embodiment, the measured tire pressure data corresponding to the first wheel is used as a reference benchmark to determine a more accurate first tire pressure conversion relationship.

[0074] In this embodiment, the first tire pressure conversion relationship is determined based on the measured tire pressure data corresponding to the first wheel and the first estimated tire pressure data corresponding to the first wheel. The measured tire pressure data corresponding to the first wheel is used as a reference benchmark to determine a more accurate first tire pressure conversion relationship.

[0075] In one embodiment, if Figure 4 As shown, step S203, i.e., determining the target tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship, includes:

[0076] S401: determining second estimated tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel;

[0077] S402: Determine target tire pressure data corresponding to the second wheel according to the second estimated tire pressure data corresponding to the second wheel and the first tire pressure conversion relationship.

[0078] The second estimated tire pressure data refers to the tire pressure data of the second wheel estimated based on the actually measured wheel data corresponding to the second wheel.

[0079] As an example, in step S401, the vehicle controller estimates the tire pressure of the second wheel according to the measured wheel data corresponding to the second wheel, and obtains the second estimated tire pressure data corresponding to the second wheel. For example, an existing tire pressure estimation algorithm (the same as the algorithm in step S301) can be used to process the input parameter of the measured wheel data corresponding to the second wheel to determine the second estimated tire pressure data corresponding to the second wheel. In this example, the second estimated tire pressure data corresponding to the second wheel is obtained to facilitate the subsequent determination of the second tire pressure conversion relationship based on the second estimated tire pressure data.

[0080] As an example, in step S402, since the first tire pressure conversion relationship is the conversion relationship between the measured tire pressure data of the same wheel and the estimated tire pressure data corresponding to the measured wheel data, it can be understood as the conversion relationship between the two tire pressure data. After obtaining the second estimated tire pressure data corresponding to the second wheel, the on-board controller uses the first tire pressure conversion relationship to correct the second estimated tire pressure data and determine the target tire pressure data corresponding to the second wheel. In this example, by processing the second estimated tire pressure data corresponding to the second wheel through the first tire pressure conversion relationship, more accurate target tire pressure data can be obtained.

[0081] In this embodiment, the tire pressure data corresponding to the second wheel is estimated based on the measured wheel data corresponding to the second wheel to obtain second estimated tire pressure data. The second estimated tire pressure data corresponding to the second wheel is further corrected through the first tire pressure conversion relationship to obtain more accurate target tire pressure data.

[0082] In one embodiment, the measured wheel data includes a first measured wheel speed and a first measured angular velocity corresponding to the first wheel. Figure 5 As shown, step S202, i.e., determining a first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel, includes:

[0083] S501: determining a first tire radius of the first wheel according to a first measured wheel speed and a first measured angular velocity corresponding to the first wheel;

[0084] S502: Determine a first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and a first tire radius of the first wheel.

[0085] The first measured wheel speed refers to the wheel speed of the first wheel actually monitored. The first measured angular velocity refers to the angular velocity of the first wheel actually monitored. The first tire radius refers to the tire radius corresponding to the first wheel corresponding to the monitored first measured wheel speed and the first measured angular velocity.

[0086] As an example, in step S501, the vehicle controller determines the first tire radius corresponding to the first wheel according to the data relationship between the first measured wheel speed and the first measured angular velocity corresponding to the first wheel. Among them, r 1 Refers to the radius of the first tire corresponding to the first wheel, v 1 refers to the first measured wheel speed corresponding to the first wheel, w 1 Refers to the first measured angular velocity corresponding to the first wheel. In this example, the first tire radius of the first wheel is determined according to the first measured wheel speed and the first measured angular velocity corresponding to the first wheel, so that it is feasible to subsequently determine the first tire pressure conversion relationship according to the first tire radius of the first wheel.

[0087] As an example, in step S502, the onboard controller calculates the calibration relationship between the first tire radius of the first wheel and the measured tire pressure data corresponding to the first wheel, and determines the calibration relationship as the first tire pressure conversion relationship. For example, the calibration relationship between the first tire radius of the first wheel and the measured tire pressure data corresponding to the first wheel can be determined according to the radius calibration algorithm, thereby obtaining the first tire pressure conversion relationship. In this example, the measured tire pressure data of the first wheel is used as the calibration reference, so that the calculated first tire pressure conversion relationship can be more accurate.

[0088] In this embodiment, the first tire radius of the first wheel is determined based on the first measured wheel speed and the first measured angular velocity, and the first tire pressure conversion relationship is determined based on the first tire radius and the measured tire pressure data of the first wheel. The measured tire pressure data of the first wheel is used as a calibration reference to obtain a more accurate first tire pressure conversion relationship.

[0089] In one embodiment, the measured wheel data further includes a second measured wheel speed and a second measured angular velocity corresponding to the second wheel.

[0090] In one embodiment, if Figure 6 As shown, step S203, i.e., determining the target tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship, includes:

[0091] S601: determining a second tire radius corresponding to the second wheel according to a second measured wheel speed and a second measured angular velocity corresponding to the second wheel;

[0092] S602: Determine target tire pressure data corresponding to the second wheel according to a second tire radius corresponding to the second wheel and a first tire pressure conversion relationship.

[0093] The second measured wheel speed refers to the wheel speed of the second wheel actually monitored. The second measured angular velocity refers to the angular velocity of the second wheel actually monitored. The second tire radius refers to the tire radius of the second wheel corresponding to the monitored second measured wheel speed and the second measured angular velocity.

[0094] As an example, in step S601, the vehicle controller determines the second tire radius corresponding to the second wheel according to the data relationship between the second measured wheel speed and the second measured angular velocity corresponding to the second wheel. Among them, r 2 Refers to the radius of the second tire corresponding to the second wheel, v 2 refers to the second measured wheel speed corresponding to the second wheel, w 2 Refers to the second measured angular velocity corresponding to the second wheel. In this example, the second measured wheel speed and the second measured angular velocity corresponding to the second wheel determine the second tire radius of the second wheel, making it feasible to subsequently determine the tire pressure conversion relationship between the second wheel and the first wheel based on the second tire radius of the second wheel.

[0095] As an example, in step S602, the vehicle controller uses the first tire pressure conversion relationship obtained according to the measured tire pressure data corresponding to the first wheel and the first tire radius of the first wheel to calibrate the second tire radius corresponding to the second wheel, and obtain the target tire pressure data corresponding to the second wheel. It can be understood that in this example, the first tire pressure conversion relationship is obtained by calibrating the first tire radius and the measured wheel data corresponding to the first wheel, and can be used to calibrate the second tire radius corresponding to the second wheel to obtain the target tire pressure data corresponding to the second wheel. In this example, the first tire pressure conversion relationship is used to calibrate the second tire radius corresponding to the second wheel to obtain the target tire pressure data corresponding to the second wheel. It is more convenient and quick to obtain more accurate target tire pressure data without complicated data processing.

[0096] In this embodiment, the target tire pressure data corresponding to the second wheel is obtained based on the first tire pressure conversion relationship and the second tire radius corresponding to the second wheel. Without complicated data processing, more accurate target tire pressure data can be obtained, which is more convenient and quick.

[0097] In one embodiment, if Figure 7 As shown, a tire pressure monitoring method is provided, which is described by taking the application of the method in a vehicle controller as an example, and includes the following steps:

[0098] S701: Acquire measured tire pressure data corresponding to the first wheel and measured wheel data corresponding to the four wheels;

[0099] S702: determining a second tire pressure conversion relationship according to the actually measured wheel data corresponding to the first wheel and the actually measured wheel data corresponding to the second wheel;

[0100] S703: Determine the target tire pressure data corresponding to the second wheel according to the measured tire pressure data corresponding to the first wheel and the second tire pressure conversion relationship.

[0101] Among them, step S201 is the same as step S101 and will not be repeated; step S702 is a specific implementation of step S102, and step S703 is a specific implementation of step S103.

[0102] Among them, the second tire pressure conversion relationship refers to determining the conversion relationship between tire pressure data corresponding to different wheels based on the actually measured wheel data corresponding to different wheels, which is a type of target tire pressure conversion relationship.

[0103] As an example, in step S702, the vehicle controller processes the measured wheel data corresponding to the first wheel and the measured wheel data corresponding to the second wheel, and directly determines them as the second tire pressure conversion relationship, so as to facilitate the subsequent conversion of the measured wheel data corresponding to the first wheel to obtain the target tire pressure conversion relationship corresponding to the second wheel. It can be understood that since the first tire pressure conversion relationship refers to determining the conversion relationship between the measured tire pressure data and the measured wheel data based on the measured tire pressure data and the measured wheel data corresponding to the same wheel. For the first tire pressure conversion relationship k 1 , if the measured tire pressure data of the first wheel is P 1 , the measured wheel data of the first wheel is l 1 , the measured tire pressure data of the second wheel is P 2 , the measured wheel data of the second wheel is l 2 , then k 1 =P 1 / l 1 =P 2 / l 2 Since there is a linear relationship between tire pressure data and wheel data, the second tire pressure conversion relationship determined according to the measured wheel data of different wheels also has a corresponding second tire pressure conversion relationship l for the tire pressure data of different wheels. 2 = l 1 / l 2 =P 1 / P 2 Therefore, the second tire pressure conversion relationship can be used to determine the tire pressure conversion relationship between different wheels, that is, the data relationship between the measured wheel data corresponding to the first wheel and the measured wheel data corresponding to the second wheel can be directly determined as the second tire pressure conversion relationship required for tire pressure conversion between different wheels.

[0104] As an example, in step S703, since the second tire pressure conversion relationship is determined by the conversion relationship between the measured wheel data of different wheels, the tire pressure data of different wheels also have corresponding second tire pressure conversion relationships. After obtaining the measured tire pressure data corresponding to the first wheel, the on-board controller uses the second tire pressure conversion relationship to perform tire pressure conversion processing on the measured tire pressure data corresponding to the first wheel to obtain the target tire pressure data corresponding to the second wheel. In this example, the measured tire pressure data corresponding to the first wheel is used as the conversion basis for tire pressure conversion, and the second tire pressure conversion relationship is used to convert the measured tire pressure data corresponding to the first wheel, so that more accurate target tire pressure data can be obtained.

[0105] In this embodiment, the measured tire pressure data corresponding to the first wheel is used as the conversion basis for tire pressure conversion, and the measured tire pressure data corresponding to the first wheel is converted using the second tire pressure conversion relationship, so that more accurate target tire pressure data can be obtained. In addition, this method does not require the use of hardware equipment to monitor the tire pressure of each wheel, saving hardware costs.

[0106] In another embodiment, if Figure 8 As shown, step S703, i.e., determining the target tire pressure data corresponding to the second wheel according to the measured tire pressure data corresponding to the first wheel and the second tire pressure conversion relationship, also includes:

[0107] S801: Obtaining initial tire pressure data corresponding to the second wheel according to the measured tire pressure data corresponding to the first wheel and the second tire pressure conversion relationship;

[0108] S802: Acquire a positional relationship between the second wheel and the first wheel;

[0109] S803: If the second wheel is in the axial direction of the first wheel, the initial tire pressure data is corrected using the first coefficient to obtain target tire pressure data corresponding to the second wheel;

[0110] S804: If the second wheel is in the radial direction of the first wheel, correct the initial tire pressure data using the second coefficient to obtain target tire pressure data corresponding to the second wheel;

[0111] S805: If the second wheel is in the diagonal direction of the first wheel, the initial tire pressure data is corrected using the third coefficient to obtain the target tire pressure data corresponding to the second wheel.

[0112] The initial tire pressure data refers to the tire pressure data obtained by directly converting the actually measured tire pressure data using the second tire pressure conversion relationship.

[0113] As an example, in step S801, the vehicle controller directly uses the second tire pressure conversion relationship to convert the measured tire pressure data to obtain initial tire pressure data. In this example, the vehicle controller directly uses the second tire pressure conversion relationship to convert the measured tire pressure data corresponding to the first wheel to obtain initial tire pressure data corresponding to the second wheel. In this example, the second tire pressure conversion relationship is used to convert the measured tire pressure data corresponding to the first wheel to obtain relatively accurate initial tire pressure data.

[0114] Among them, the positional relationship refers to the orientation relationship between two different wheels. It can be understood that for any two wheels, the two wheels on the same side are in a radial positional relationship with each other, and accordingly, one wheel is in the radial direction of the other wheel. The two wheels on the axis are in an axial positional relationship with each other, and accordingly, one wheel is in the axial direction of the other wheel. The two wheels on the diagonal line are in a diagonal positional relationship with each other, and accordingly, one wheel is in the diagonal direction of the other wheel.

[0115] As an example, in step S802, the on-board controller obtains the positional relationship between the second wheel and the first wheel, and determines the axial direction, radial direction or diagonal direction of the second wheel in the first wheel, so as to facilitate the subsequent further correction of the initial tire pressure data according to the positional relationship to obtain more accurate target tire pressure data. It is understandable that for the four wheels on the vehicle, when the measured tire pressure data corresponding to the first wheel is used to convert the tire pressure of the remaining three wheels and determine the target tire pressure data, the distance between the wheels will also affect the accuracy of the target tire pressure data. The second wheel with a different positional relationship with the first wheel also has a different distance from the first wheel. Therefore, it is necessary to determine different correction coefficients for the initial tire pressure data according to the positional relationship between the second wheel and the first wheel to ensure that the corrected target tire pressure data has a higher accuracy.

[0116] The first coefficient, the second coefficient and the third coefficient are used to correct the initial tire pressure data.

[0117] As an example, in step S803, when the vehicle-mounted controller determines that the second wheel is in the axial direction of the first wheel, the vehicle-mounted controller uses the first coefficient to correct the initial tire pressure data to obtain the target tire pressure data corresponding to the second wheel. In this example, the distance between the second wheel and the first wheel in the axial direction is small, and the distance has little effect on the target tire pressure data. Therefore, the initial tire pressure data can be corrected using a smaller first coefficient to facilitate obtaining the target tire pressure data with higher accuracy.

[0118] As an example, in step S804, when the vehicle-mounted controller determines that the second wheel is in the radial direction of the first wheel, the vehicle-mounted controller uses the second coefficient to correct the initial tire pressure data to obtain the target tire pressure data corresponding to the second wheel. In this example, the distance between the second wheel and the first wheel in the radial direction is relatively far, and the distance has a greater impact on the target tire pressure data. Therefore, a larger second coefficient can be used to correct the initial tire pressure data to facilitate obtaining the target tire pressure data with higher accuracy.

[0119] As an example, in step S805, when the onboard controller determines the diagonal direction of the second wheel in the first wheel, the initial tire pressure data is corrected by the third coefficient to obtain the target tire pressure data corresponding to the second wheel. In this example, the distance between the second wheel and the first wheel in the axial direction is the largest, and the influence of the distance on the target tire pressure data is greater than that in the axial direction and the radial direction. Therefore, the initial tire pressure data can be corrected by the third coefficient that is larger than the first coefficient and the second coefficient, so as to obtain the target tire pressure data with higher accuracy.

[0120] In this embodiment, the second tire pressure conversion relationship is used to convert the measured tire pressure data corresponding to the first wheel, so that relatively accurate initial tire pressure data can be obtained. According to the positional relationship between the first wheel and the second wheel, different coefficients are used to further correct the initial tire pressure data, so that the target tire pressure data can be guaranteed to have higher accuracy.

[0121] In one embodiment, if Fig. 9 As shown, after step S103, that is, after determining the target tire pressure data corresponding to the second wheel, the tire pressure monitoring method further includes:

[0122] S901: If the measured tire pressure data corresponding to the first wheel and the target tire pressure data corresponding to the three second wheels are all within the normal tire pressure range, then it is determined that the tire pressure of the vehicle is normal;

[0123] S902: If at least one of the measured tire pressure data corresponding to the first wheel and the target tire pressure data corresponding to the three second wheels is not within the normal tire pressure range, it is determined that the tire pressure is abnormal, and an abnormal tire pressure warning operation is performed.

[0124] Among them, the normal tire pressure range is used to determine whether the tire pressure of the wheel is normal.

[0125] As an example, in step S901, the vehicle controller determines the measured tire pressure data corresponding to the first wheel, and uses the target tire pressure conversion relationship to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel. When the obtained target tire pressure data corresponding to the three second wheels are all within the normal tire pressure range, it is directly determined that the tire pressure of the vehicle is normal. In this example, monitoring whether the tire pressure of the four wheels is within the normal tire pressure range can achieve the purpose of real-time monitoring of the tire pressure of each wheel in the vehicle, thereby improving the safety performance of the vehicle.

[0126] As an example, in step S902, when the on-board controller determines that at least one of the measured tire pressure data corresponding to the first wheel and the target tire pressure data corresponding to the three second wheels is not within the normal tire pressure range, it directly determines that the tire pressure of the entire vehicle is abnormal, and performs abnormal tire pressure alarm operations to prompt driving and perform maintenance to avoid accidents.

[0127] In this embodiment, the tire pressure of the four wheels is monitored to see if it is within the normal tire pressure range, which can achieve the purpose of real-time monitoring of the tire pressure of each wheel in the vehicle and improve the vehicle safety performance. When it is determined that the tire pressure data corresponding to a wheel is not within the normal tire pressure range, it is directly determined that the tire pressure of the vehicle is abnormal, and the tire pressure abnormality alarm operation is performed to prompt the driver and perform maintenance to avoid accidents.

[0128] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0129] In one embodiment, a vehicle-mounted controller is provided. The vehicle-mounted controller may be a server, and its internal structure diagram may be as follows: Fig.10 As shown. The on-board controller includes a processor, a memory, a network interface and a database connected through a system bus. Among them, the processor of the on-board controller is used to provide computing and control capabilities. The memory of the on-board controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the on-board controller is used to store data used or generated during the execution of the tire pressure monitoring method. The network interface of the on-board controller is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a tire pressure monitoring method is implemented.

[0130] In one embodiment, a vehicle-mounted controller is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the tire pressure monitoring method in the above embodiment is implemented, for example Figure 1 S101-S103 as shown, or Figures 2 to 9 To avoid repetition, it will not be described here.

[0131] In one embodiment, a tire pressure monitoring system is provided, including a vehicle-mounted controller, a tire pressure sensor, and a data monitoring sensor. The tire pressure sensor is arranged on a first wheel, and is used to obtain the actual tire pressure data of the first wheel; the data monitoring sensors are respectively arranged on four wheels, and are used to obtain the actual wheel data corresponding to the four wheels; the vehicle-mounted controller is respectively connected to the tire pressure sensor and the data monitoring sensor, and is used to implement the vehicle tire pressure monitoring method in the above embodiment.

[0132] As an example, a tire pressure monitoring system includes a vehicle-mounted controller, a tire pressure sensor, and a data monitoring sensor. Among them, the data monitoring sensor includes a wheel speed sensor and an angular velocity sensor. The tire pressure sensor is arranged on the first wheel, and is used to obtain the measured tire pressure data of the first wheel; the wheel speed sensor and the angular velocity sensor are respectively arranged on the four wheels, and are used to obtain the measured wheel speeds and measured angular velocities corresponding to the four wheels respectively; for example, for the first wheel, the wheel speed sensor is used to collect the first measured wheel speed corresponding to the first wheel, and the angular velocity sensor is used to collect the first measured angular velocity corresponding to the first wheel. For the second wheel other than the first wheel, the wheel speed sensor is used to collect the second measured wheel speed corresponding to the second wheel, and the angular velocity sensor is used to collect the second measured angular velocity corresponding to the second wheel. The vehicle-mounted controller is respectively connected to the tire pressure sensor, the wheel speed sensor, and the angular velocity sensor, and is used to determine the target tire pressure data corresponding to the second wheel other than the first wheel, so as to implement the tire pressure monitoring method in the above embodiment.

[0133] In this embodiment, it is not necessary to install a tire pressure sensor on each wheel to obtain more accurate target tire pressure data corresponding to the second wheel, which not only saves hardware copies but also enables monitoring of tire pressure and improves wheel safety performance.

[0134] In one embodiment, a vehicle is provided, comprising the tire pressure monitoring system in the above embodiment.

[0135] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A tire pressure monitoring method, It is characterized in that include: Obtaining measured tire pressure data corresponding to the first wheel and measured wheel data corresponding to the four wheels; Determining a target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels; The target tire pressure conversion relationship is used to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel; the second wheel is a wheel other than the first wheel.

2. The tire pressure monitoring method according to claim 1, It is characterized in that The determining the target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels includes: determining a first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel; The adopting the target tire pressure conversion relationship to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel includes: The target tire pressure data corresponding to the second wheel is determined according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship.

3. The tire pressure monitoring method according to claim 2, It is characterized in that The determining the first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel includes: determining first estimated tire pressure data corresponding to the first wheel according to the measured wheel data corresponding to the first wheel; A first tire pressure conversion relationship is determined according to the measured tire pressure data corresponding to the first wheel and the first estimated tire pressure data corresponding to the first wheel.

4. The tire pressure monitoring method according to claim 2, It is characterized in that The determining the target tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship includes: determining second estimated tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel; The target tire pressure data corresponding to the second wheel is determined according to the second estimated tire pressure data corresponding to the second wheel and the first tire pressure conversion relationship.

5. The tire pressure monitoring method according to claim 2, It is characterized in that The measured wheel data includes a first measured wheel speed and a first measured angular velocity corresponding to the first wheel; The determining a first tire pressure conversion relationship according to the actually measured tire pressure data corresponding to the first wheel and the actually measured wheel data corresponding to the first wheel includes: determining a first tire radius of the first wheel according to a first measured wheel speed and a first measured angular velocity corresponding to the first wheel; A first tire pressure conversion relationship is determined according to the actually measured tire pressure data corresponding to the first wheel and a first tire radius of the first wheel.

6. The tire pressure monitoring method according to claim 5, It is characterized in that The measured wheel data also includes a second measured wheel speed and a second measured angular velocity corresponding to the second wheel; The determining the target tire pressure data corresponding to the second wheel according to the measured wheel data corresponding to the second wheel and the first tire pressure conversion relationship includes: determining a second tire radius corresponding to the second wheel according to a second measured wheel speed and a second measured angular velocity corresponding to the second wheel; The target tire pressure data corresponding to the second wheel is determined according to a conversion relationship between a second tire radius corresponding to the second wheel and the first tire pressure.

7. The tire pressure monitoring method according to claim 1, It is characterized in that The determining the target tire pressure conversion relationship according to the measured tire pressure data corresponding to the first wheel and the measured wheel data corresponding to the four wheels includes: determining a second tire pressure conversion relationship according to the actually measured wheel data corresponding to the first wheel and the actually measured wheel data corresponding to the second wheel; The adopting the target tire pressure conversion relationship to process the measured tire pressure data corresponding to the first wheel or the measured wheel data corresponding to the second wheel to determine the target tire pressure data corresponding to the second wheel includes: The target tire pressure data corresponding to the second wheel is determined according to the measured tire pressure data corresponding to the first wheel and the second tire pressure conversion relationship.

8. A vehicle-mounted controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the computer program, the tire pressure monitoring method according to any one of claims 1 to 7 is implemented.

9. A tire pressure monitoring system, It is characterized in that It includes the vehicle-mounted controller, tire pressure sensor, and data monitoring sensor as described in claim 8, wherein the tire pressure sensor is arranged on the first wheel, and is used to obtain the measured tire pressure data of the first wheel; the data monitoring sensors are respectively arranged on four wheels, and are used to obtain the measured wheel data corresponding to the four wheels; the vehicle-mounted controller is respectively connected to the tire pressure sensor and the data monitoring sensor, and is used to implement the vehicle tire pressure monitoring method as described in any one of claims 1 to 7.

10. A car, It is characterized in that Including the tire pressure monitoring system as described in claim 9.

Images