Tire pressure detection system, tire pressure detection method and device, storage medium and vehicle

Abstract

The invention discloses a tire pressure detection system, a tire pressure detection method, a tire pressure detection device, a storage medium and a vehicle. A known and accurate tire pressure measured value is detected through a first wheel of a tire pressure sensor, and the relationship between the tire pressure of the wheel and a working parameter group is determined according to the tire pressure measured value and the working parameter group of the first wheel; the tire pressure calculation value of the second wheel can be obtained without installing a tire pressure sensor on the second wheel, so that the tire pressure sensor and related hardware components are saved, the use cost and the maintenance cost are reduced, and the balance between the cost and the tire pressure data precision is realized; moreover, the measured tire pressure value is processed according to the working parameter groups of the first wheel and the second wheel to obtain the calculated tire pressure value, so that the internal relationship between the measured tire pressure value and the attributes of the tire can be more comprehensively excavated, and the calculated tire pressure value closer to the actual tire pressure of the second wheel can be obtained. The invention is widely applied to the technical field of automobiles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, and in particular to a tire pressure detection system, a tire pressure detection method, a device, a storage medium and a vehicle. BACKGROUND

[0002] Most automobiles use pneumatic tires, and the air pressure in the tires, i.e., the tire pressure, needs to be maintained within a proper range. If the tire pressure is too high, it can cause the friction between the tire and the road surface to decrease, the tire to wear unevenly, and the rate of tire blowouts to be high, among other adverse consequences. If the tire pressure is too low, it can cause the road resistance to be high, the energy consumption to be high, the tire structure to be damaged, and the suspension system to be damaged due to imbalance, among other adverse consequences. Therefore, during the daily use of an automobile, the tire pressure needs to be detected regularly.

[0003] Previously, a tire pressure measuring tool provided by a repair shop or a tire pressure measuring tool provided by the user of the automobile needed to be used to detect the tire pressure. However, both the tire pressure measuring tool provided by the repair shop and the tire pressure measuring tool provided by the user of the automobile have the inconvenience of needing to stop the automobile for detection, which affects the frequency of tire pressure measurement and causes the automobile to be at high risk of abnormal tire pressure for a long time.

[0004] With the development of automobile technology, more and more automobiles use a tire pressure detection system installed on the automobile, so that the tire pressure of the automobile can be detected without using an external device, which improves the convenience and real-time performance of tire pressure detection, and is beneficial for the user of the automobile to pay attention to the tire pressure of the automobile, to properly maintain the automobile, and to maintain the tire pressure within a proper range, thereby ensuring the safety of the automobile.

[0005] However, the tire pressure detection system installed on the automobile needs to install a tire pressure sensor on the wheel to detect the tire pressure data of the wheel, and a domain controller for data processing is generally installed at a location far from the wheel, such as the engine compartment. In order to realize communication between the tire pressure sensor and the domain controller, a wireless communication method is generally used, i.e., a wireless transmitter is installed at the wheel and connected to the tire pressure sensor, the tire pressure data detected by the tire pressure sensor is transmitted through a wireless signal by the wireless transmitter, a wireless receiver is installed at the engine compartment and connected to the domain controller, the wireless signal emitted by the wireless transmitter is received by the wireless receiver, and the data format is converted into a format that can be processed by the domain controller and sent to the domain controller. In order to ensure the operation of the tire pressure sensor and the wireless transmitter installed at the wheel, a power supply module also needs to be provided at the wheel. The power supply module generally uses a battery for power supply, and the battery needs to be removed when it is replaced.

[0006] Therefore, the tire pressure detection system installed on the automobile needs hardware structure support, which often requires relatively high hardware costs and maintenance costs. In particular, the automobile has multiple wheels, and corresponding hardware structures need to be provided on each wheel, resulting in several times the cost. SUMMARY

[0007] In view of the high hardware cost and complex maintenance of the current tire pressure detection system, the present application aims to provide a tire pressure detection system, a tire pressure detection method, a device, a storage medium and a vehicle.

[0008] In one aspect, the present application includes a tire pressure detection system, which comprises: a tire pressure sensor, configured to detect the tire pressure of a first wheel in a vehicle and obtain a tire pressure measured value; a plurality of sensor groups, each of which comprises a plurality of parameter sensors and is configured to detect a corresponding wheel in the vehicle and obtain a working parameter group, wherein the working parameter group comprises working parameters detected by each parameter sensor in the sensor group; a domain controller, configured to, in a first detection mode, determine a tire pressure calculated value of a second wheel in the vehicle according to the tire pressure measured value, the working parameter group corresponding to the first wheel and the working parameter group corresponding to the second wheel, wherein the second wheel is different from the first wheel in the same vehicle.

[0009] Further, the domain controller is configured to, in a second detection mode, obtain a plurality of tire pressure measured values or a plurality of tire pressure calculated values of any wheel in the vehicle, and perform historical data compensation processing on the plurality of tire pressure values or the plurality of tire pressure calculated values to obtain a tire pressure predicted value of the wheel. The domain controller is configured to, in the second detection mode, obtain a tire pressure difference between the tire pressure predicted value and the tire pressure measured value of the first wheel, and execute an alarm when the tire pressure difference is greater than a threshold value.

[0010] Further, the domain controller is configured to detect the working effectiveness of the tire pressure sensor, trigger the execution of the first detection mode when the tire pressure sensor is detected to be effective, and trigger the execution of the second detection mode when the tire pressure sensor is detected to be ineffective.

[0011] Further, the tire pressure sensor is configured to detect at a plurality of sampling time points to obtain the tire pressure measured value in the form of a time sequence. The sensor group is configured to detect at the same sampling time points to obtain the working parameter group in the form of a time sequence.

[0012] Further, the determination of the tire pressure calculated value of the second wheel according to the tire pressure measured value, the working parameter group corresponding to the first wheel and the working parameter group corresponding to the second wheel comprises: dividing all the working parameters into first type parameters or second type parameters; clustering the part of the working parameter set belonging to the first type parameter to obtain at least one cluster center, and determining a corresponding working condition type according to each cluster center; For any tire pressure measured value, according to the working condition type corresponding to the working parameter set of the first wheel detected at the same sampling time, and the working parameter belonging to the second type parameter in the working parameter set of the first wheel, the tire pressure measured value is marked; For any second wheel, according to the working condition type corresponding to the working parameter set of the second wheel, the tire pressure measured value marked with the same working condition type is screened out, and the screened tire pressure measured value and the marked working parameter are fitted to obtain a tire pressure-second type parameter fitting relationship. According to the tire pressure-second type parameter fitting relationship and the working parameter belonging to the second type parameter of the second wheel, the tire pressure calculation value of the second wheel is determined.

[0013] Further, the division of all the working parameters into first type parameters or second type parameters includes: traversing all parameter types; For any parameter type, the working parameters belonging to the parameter type detected by the same sensor set form a same set. When the intersection of all sets is empty, all the working parameters belonging to the parameter type are divided into the first type parameters, otherwise, when the intersection of all sets is not empty, all the working parameters belonging to the parameter type are divided into the second type parameters.

[0014] On the other hand, an embodiment of the present application includes a tire pressure detection method, which includes: detecting the tire pressure of a first wheel in a vehicle to obtain a tire pressure measured value; detecting each wheel in the vehicle respectively to obtain a corresponding working parameter set for each wheel; the working parameter set includes a plurality of working parameters; In the first detection mode, according to the tire pressure measured value, the working parameter set corresponding to the first wheel and the working parameter set corresponding to the second wheel, the tire pressure calculation value of the second wheel is determined; the second wheel is a wheel other than the first wheel in the same vehicle.

[0015] On the other hand, an embodiment of the present application includes a computer device, which includes a memory and a processor, the memory is used to store at least one program, and the processor is used to load the at least one program to execute the tire pressure detection method in the embodiment.

[0016] In another aspect, an embodiment of the present application includes a computer readable storage medium having stored thereon a processor-executable program which, when executed by a processor, is adapted to perform the tire pressure detection method in the embodiment.

[0017] In another aspect, an embodiment of the present application includes a vehicle comprising the tire pressure detection system in the embodiment.

[0018] The beneficial effects of the present application are: the tire pressure detection system in the embodiment detects a known accurate tire pressure measured value through the first wheel of the tire pressure sensor, and determines the relationship between the tire pressure and the working parameter group of the wheel according to the tire pressure measured value and the working parameter group of the first wheel, and determines a tire pressure calculation value for any second wheel according to the working parameter group of the second wheel, so as to obtain an accurate estimation of the tire pressure of the second wheel, and to achieve the tire pressure calculation value of the second wheel without installing a tire pressure sensor on the second wheel, to save the tire pressure sensor and related hardware components, to reduce the use and maintenance costs, to improve the usability of the automobile tire pressure monitoring system, and to achieve a balance between the cost and the tire pressure data accuracy; and moreover, the tire pressure calculation value is obtained by processing the tire pressure measured value according to the working parameter groups of the first wheel and the second wheel, which can more comprehensively explore the internal relationship between the tire pressure measured value and the properties of the tire itself, so as to be conducive to obtaining a tire pressure calculation value closer to the actual tire pressure of the second wheel. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 a schematic diagram of the related technology in the embodiment; Figure 2 a schematic diagram of the vehicle to which the tire pressure detection system in the embodiment can be applied; Figure 3 a structural schematic diagram of the tire pressure detection system in the embodiment; Figure 4 a schematic diagram of the first detection mode and the second detection mode in the embodiment; Figure 5 a schematic diagram of the steps of the tire pressure detection method in the embodiment; Figure 6 a schematic diagram of the principle of determining whether the working parameter belongs to the first type parameter in the embodiment; Figure 7 a schematic diagram of the principle of determining whether the working parameter belongs to the second type parameter in the embodiment; Figure 8 a schematic diagram of the principle of clustering the first type parameter in the embodiment; Figure 9 a schematic diagram of the principle of marking the tire pressure measured value with the working condition type and the second type parameter in the embodiment; Figure 10A schematic diagram of a principle for obtaining a tire pressure value-second type parameter fitting relationship of a second wheel in an embodiment; Figure 11 A schematic diagram of a principle for obtaining a tire pressure calculation value of a second wheel in an embodiment; Figure 12 A schematic diagram of a connection relationship between a domain controller and a central speed controller in an embodiment. DETAILED DESCRIPTION

[0020] Term explanation: Direct tire pressure detection: As shown in FIG. 1, a tire pressure sensor is installed at a position in a tire of a wheel, real-time air pressure data is collected, and the data is transmitted to a processor via radio frequency wireless transmission. Direct tire pressure detection is a method of detecting tire pressure of a wheel using a physical hardware component. The obtained tire pressure data is a measured value. The advantage of direct tire pressure detection is that a high detection accuracy is obtained through hardware measurement. The disadvantage is that a corresponding hardware component needs to be provided for each wheel, resulting in high hardware cost and maintenance cost. Figure 1 Indirect tire pressure detection: Since tire pressure of a wheel affects shape parameters such as flat ratio and diameter of the wheel, and ultimately affects working parameters such as rotation speed of the wheel, there is a certain correlation between rotation speed of the wheel and tire pressure. Tire pressure can be calculated by detecting the rotation speed of the wheel, thereby achieving detection of tire pressure. Indirect tire pressure detection is a method of calculating tire pressure by using data measured by a hardware component for other purposes (for example, detecting rotation speed), instead of using a physical hardware component for detecting air pressure. The advantage of indirect tire pressure detection is that a hardware component for detecting tire pressure does not need to be provided at the wheel, which is beneficial for reducing hardware cost and maintenance cost (the hardware component for detecting rotation speed and other purposes is originally provided in a vehicle, and its cost is not included in the tire pressure detection function). The disadvantage is that tire pressure data is not measured but calculated, and its accuracy is limited by rough calculation relationship and other factors.

[0021] Considering the advantages and disadvantages of complete direct tire pressure detection and complete indirect tire pressure detection, in the present embodiment, a tire pressure detection system is provided.

[0022] In the present embodiment, the tire pressure detection system can be applied to a vehicle as shown in FIG. 2. Referring to FIG. 2, the vehicle includes four wheels, i.e., a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel.

[0023] Figure 2 Figure 2

[0024] Figure 3 ​​​​The tire pressure detection system comprises a domain controller, a tire pressure sensor, and sensor groups 0, 1, 2, and 3, wherein the domain controller and the tire pressure sensor are physical hardware components, and each sensor group can be a physical hardware component or a software functional module.

[0025] In this embodiment, one of the wheels is selected as the first wheel, i.e., the wheel on which the tire pressure sensor is installed, and the other wheels are the second wheels, i.e., the wheels on which the tire pressure sensor is not installed. For example, referring to Figure 2 and Figure 3 , the left front wheel is the first wheel, and the right front wheel, the left rear wheel, and the right rear wheel are the second wheels.

[0026] Referring to Figure 3 , the tire pressure sensor installed on the first wheel (the left front wheel) can detect the tire pressure of the first wheel and obtain a tire pressure measured value. The tire pressure measured value is the data obtained by the tire pressure sensor measuring the tire pressure of the first wheel. Since the accuracy of the tire pressure sensor can be very high, the error of the tire pressure measured value can be ignored.

[0027] Referring to Figure 3 , the sensor group comprises a plurality of parameter sensors. For example, taking sensor group 0 as an example, the rotational speed sensor therein detects the first wheel (the left front wheel) to obtain a rotational speed type working parameter (indicating the rotational speed of the first wheel (the left front wheel)), the acceleration sensor detects the first wheel (the left front wheel) to obtain an acceleration type working parameter (indicating the rotational acceleration of the first wheel (the left front wheel)), and the turning radius sensor detects the first wheel (the left front wheel) to obtain a turning radius type working parameter (indicating the turning radius of the first wheel (the left front wheel)).

[0028] The various types of working parameters such as the rotational speed type, the acceleration type, and the turning radius type detected by sensor group 0 form a working parameter group of the first wheel (the left front wheel).

[0029] Similarly, sensor group 1 also detects various types of working parameters such as the rotational speed type, the acceleration type, and the turning radius type of the second wheel 1 (the right front wheel) to form a working parameter group of the second wheel 1 (the right front wheel); sensor group 2 also detects various types of working parameters such as the rotational speed type, the acceleration type, and the turning radius type of the second wheel 2 (the left rear wheel) to form a working parameter group of the second wheel 2 (the left rear wheel); and sensor group 3 also detects various types of working parameters such as the rotational speed type, the acceleration type, and the turning radius type of the second wheel 3 (the right rear wheel) to form a working parameter group of the second wheel 3 (the right rear wheel).

[0030] In this embodiment, referring to Figure 3The tire pressure sensor and the domain controller can be connected through a wireless communication protocol, and the sensor group and the domain controller can be connected through a wired communication protocol such as CAN. Since the communication protocol such as CAN can supply power to the sensor group, it is not necessary to replace the battery of the sensor group for maintenance.

[0031] In the embodiment, different sensors in the same sensor group can be multiplexed. For example, for the sensor group 0, the rotation speed data detected by the rotation speed sensor therein can be differentiated with respect to time to obtain acceleration data, thereby realizing the function of the acceleration sensor, i.e., the acceleration sensor in the sensor group 0 can not need to be provided with a corresponding physical hardware component. Different sensor groups can also be multiplexed. For example, the domain controller can call the positioning data of the vehicle to calculate the driving trajectory of the vehicle, and calculate the turning radius of each wheel according to the driving trajectory, thereby realizing the function of the turning radius sensor in all sensor groups, i.e., the turning radius sensor in each sensor group can not need to be provided with a corresponding physical hardware component. Therefore, Figure 3 Each sensor group in the sensor group set and the sensors therein can be used as a representation of the corresponding functional module of the vehicle, and it is not necessary to provide a corresponding physical hardware component.

[0032] In the embodiment, the working mode of the domain controller is as shown in Figure 4 Referring to Figure 4 , the domain controller can detect the working effectiveness of the tire pressure sensor installed on the first wheel (the front left wheel). If it is detected that the tire pressure sensor is effective, e.g., the tire pressure sensor can work normally without failure, the domain controller executes the first detection mode. When it is detected that the tire pressure sensor is ineffective, e.g., the tire pressure sensor fails and reports an error, the domain controller executes the second detection mode.

[0033] In the embodiment, the tire pressure detection method executed by the domain controller in the first detection mode is as shown in Figure 5 , and includes the following steps: S1. detecting the tire pressure of the first wheel in the vehicle to obtain a tire pressure measured value; S2. detecting each wheel in the vehicle respectively to obtain a working parameter group corresponding to each wheel; S3. in the first detection mode, determining a tire pressure calculation value of the second wheel according to the tire pressure measured value, the working parameter group corresponding to the first wheel, and the working parameter group corresponding to the second wheel.

[0034] In step S1, the tire pressure of the first wheel can be detected by the tire pressure sensor at sampling moments t1, t2, t3, …, t n , to obtain tire pressure measured value 1, tire pressure measured value 2, tire pressure measured value 3, …, tire pressure measured value nThe tire pressure sensor sends the detected tire pressure measured value to the domain controller in real time.

[0035] In step S2, the tire pressure measured value in the form of time series can be detected by each sensor group at t1, t2, t3, …, t n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time.

[0036] For example, sensor group 0 detects at t1, t2, t3, …, t n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n Sensor group 1 detects the second wheel 1 (right front wheel) at t1, t2, t3, …, t n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n Sensor group 2 detects the second wheel 2 (left rear wheel) at t1, t2, t3, …, t n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n Sensor group 3 detects the second wheel 3 (right rear wheel) at t1, t2, t3, …, t n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n The working parameters of the corresponding wheels are detected at the same sampling time, and the working parameter groups in the form of time series are obtained, and the detected working parameter groups are sent to the domain controller in real time. n ​​​​

[0037] In step S3, since the tire pressure sensor can operate normally in the first detection mode, the actual tire pressure value detected by the tire pressure sensor is accurate and represents the actual tire pressure of the first wheel (left front wheel). For any other second wheel, taking the second wheel 1 (right front wheel) as an example, the domain controller can map the actual tire pressure value to the calculated tire pressure value of the second wheel 1 (right front wheel) based on the relationship between the working parameter group corresponding to the first wheel and the working parameter group corresponding to the second wheel 1 (right front wheel).

[0038] In this embodiment, the principle of executing steps S1-S3 is that the air filled in the wheel is part of the wheel, so the tire pressure of the wheel belongs to the property of the wheel itself, which affects the working parameter group generated when the wheel is working, and the wheels installed on the same car usually belong to the same manufacturer, the same model, etc., so it can be considered that the relationship between the tire pressure and the working parameter group is the same; for the first wheel installed with a tire pressure sensor, its tire pressure is a known and accurate tire pressure measured value, so the relationship between the tire pressure of this wheel and the working parameter group can be determined based on the tire pressure measured value and the working parameter group of the first wheel. This relationship is also valid for any second wheel, so for any second wheel, a tire pressure calculation value can be determined based on its working parameter group. The tire pressure calculation value represents an accurate estimate of the tire pressure of the second wheel obtained based on the physical law connection between the tire pressure and the working parameter group, thereby achieving the goal of obtaining the tire pressure calculation value of the second wheel without installing a tire pressure sensor on the second wheel, thereby saving tire pressure sensors; for example, Figure 3 As shown, a tire pressure sensor only needs to be installed on one of the four wheels, namely the first wheel. Compared with installing tire pressure sensors on all wheels, 75% fewer tire pressure sensors and corresponding hardware such as wireless transmitters and power supply modules are installed, which correspondingly reduces maintenance costs such as battery replacement in the later stage, improves the usability of the automobile tire pressure monitoring system, and achieves a balance between cost and tire pressure data accuracy; moreover, by processing the actual tire pressure measured value according to the working parameter group of the first wheel and the second wheel (including multiple working parameters, rather than a single working parameter) to obtain the calculated tire pressure value, it is possible to more comprehensively explore the intrinsic relationship between the actual tire pressure measured value and the properties of the tire itself, thereby facilitating the acquisition of a calculated tire pressure value that is closer to the actual tire pressure of the second wheel.

[0039] In this embodiment, when the domain controller executes step S3, that is, the step of determining the calculated tire pressure value of the second wheel based on the measured tire pressure value, the operating parameter group corresponding to the first wheel, and the operating parameter group corresponding to the second wheel, the following steps may be specifically performed: S301. Divide all working parameters into first type parameters or second type parameters; S302. Clustering the part of the working parameter set belonging to the first type parameter to obtain at least one cluster center, and determining a corresponding working condition type according to each cluster center; S303. For any tire pressure measurement value, according to the working condition type corresponding to the working parameter set of the first wheel detected at the same sampling time, and the working parameter belonging to the second type parameter in the working parameter set of the first wheel, marking the tire pressure measurement value; S304. For any second wheel, according to the working condition type corresponding to the working parameter set of the second wheel, filtering out the tire pressure measurement value marked with the same working condition type, fitting the filtered tire pressure measurement value and the marked working parameter to obtain a tire pressure-second type parameter fitting relationship, and determining a tire pressure calculation value of the second wheel according to the tire pressure-second type parameter fitting relationship and the working parameter belonging to the second type parameter of the second wheel.

[0040] In this embodiment, each sensor group in step S2 obtains multiple types of working parameters such as speed type, acceleration type, and turning radius type. When performing step S301, whether the working parameters of these types belong to the first type parameter or the second type parameter can be investigated respectively.

[0041] For example, as shown in Figure 6 , step S301 is performed on the working parameters of the turning radius type to determine whether the working parameters of the turning radius type belong to the first type parameter or the second type parameter. Referring to Figure 6 , the turning radius 01, the turning radius 02, the turning radius 03, …, and the turning radius 0 n detected by the sensor group 0 form a set and occupy a certain value range, and the turning radii respectively detected by the sensor group 1, the sensor group 2, and the sensor group 3 form a set and occupy a certain value range. The intersection formed between the four sets (value ranges) is an empty set, so the working parameters of the turning radius type are determined as the first type parameter.

[0042] That is, the first type parameter is a parameter that “the working conditions of each wheel in this type are greatly different, resulting in no intersection of working parameters in this type”. For example, as shown in Figure 6 , since the turning radii of the wheels at different positions on the vehicle are greatly different (for example, the front wheels as the steering wheels can produce a larger turning radius, while the rear wheels can only produce a smaller turning radius), the working parameters of the turning radius type belong to the first type parameter.

[0043] For example, as shown in Figure 7 , step S301 is performed on the working parameters of the speed type to determine whether the working parameters of the speed type belong to the first type parameter or the second type parameter. Referring to Figure 7, the rotating speed 01, the rotating speed 02, the rotating speed 03, …, the rotating speed 0 detected by the sensor group 0 n The rotating speed detected by the sensor group 1, the rotating speed detected by the sensor group 2 and the rotating speed detected by the sensor group 3 respectively form a set and occupy a certain value range. The intersection formed between the four sets (value ranges) is a non-empty set, and then the rotating speed type working parameter is determined as the second type parameter.

[0044] That is, the second type parameter is a parameter that “the working conditions of each wheel in this type may have deviations but the differences are small, or even no deviation, resulting in the intersection of working parameters in this type”. For example, as shown in Figure 7 , since the rotating speeds of the wheels at different positions on the automobile have small differences (the existing errors may be caused by the inequality of the ground where each wheel is located), the turning radius type working parameter belongs to the second type parameter.

[0045] In this embodiment, it is assumed that the measured acceleration type working parameter is the same as the turning radius type working parameter, and also belongs to the first type parameter.

[0046] In step S302, as shown in Figure 8 , for the working parameter groups of (the rotating speed 01, the acceleration 01, the turning radius 01), (the rotating speed 02, the acceleration 02, the turning radius 02), (the rotating speed 03, the acceleration 03, the turning radius 03), …, (the rotating speed 0 n , the acceleration 0 n , the turning radius 0 n ) detected by the sensor group 0, the parts belonging to the first type parameter are taken, that is, the acceleration type and the turning radius type, that is, (the acceleration 01, the turning radius 01), (the acceleration 02, the turning radius 02), (the acceleration 03, the turning radius 03), …, (the acceleration 0 n , the turning radius 0 n ), and the parts belonging to the first type parameter are taken for the working parameter groups detected by other sensor groups. The taken parts can be expressed in the form of coordinates, so that the clustering algorithm can be performed to obtain at least one clustering center. In this embodiment, referring to Figure 8 , three clustering centers are obtained, each of which determines a working condition type, so that the working condition type 1, the working condition type 2 and the working condition type 3 are obtained.

[0047] In step S303, as shown in Figure 9 , for the tire pressure actually measured value 1 detected by the tire pressure sensor, the first type parameter (the acceleration 01, the turning radius 01) of the first wheel detected at the same time t1 can be obtained, and according to Figure 8The clustering result shown determines the corresponding operating condition type (specifically operating condition type 1), obtains the second type parameter speed 01 of the first wheel detected at the same time, i.e., t1, and represents the tire pressure measured value 1 as the position on the vertical axis and the speed 01 as the position on the horizontal axis, thereby determining a point and marking this point with the corresponding operating condition type (operating condition type 1), thereby marking the tire pressure measured value 1. Similarly, for the tire pressure measured values ​​2, 3, ... detected by the tire pressure sensor, n etc. are also marked accordingly to obtain Figure 9 The marked results are shown.

[0048] In step S304, taking the second wheel 2 (left rear wheel) as an example, according to the working parameters of the second wheel 2 (left rear wheel) (acceleration 21, turning radius 21), (acceleration 22, turning radius 22), (acceleration 23, turning radius 23) ... (acceleration 2 n , turning radius 2 n ),exist Figure 8 The clustering results shown determine all the working condition types corresponding to the second wheel 2 (left rear wheel). In this embodiment, it is assumed that the working parameters of the second wheel 2 (left rear wheel) belong to working condition type 1 and working condition type 3 respectively, and there is no working parameter belonging to working condition type 2. Figure 10 As shown, in Figure 9 Based on the marking results shown, the measured tire pressure values ​​marked with the same operating condition type as the second wheel 2 (left rear wheel), that is, operating condition type 1 and operating condition type 3, are screened out, that is, the measured tire pressure values ​​corresponding to operating condition type 2 are deleted, and a fitting algorithm (such as the least squares method) is executed on the screened measured tire pressure values ​​and the corresponding working parameters to obtain a tire pressure value-second type parameter fitting relationship. The tire pressure value-second type parameter fitting relationship represents the functional relationship between the second type parameter and the tire pressure value.

[0049] In step S304, refer to Figure 11 After measuring an operating parameter (rotation speed) belonging to the second type of parameter for the second wheel 2 (left rear wheel) through the sensor group 2, the tire pressure calculated value of the second wheel 2 (left rear wheel) can be calculated based on the rotation speed, the second type of parameter and the tire pressure value.

[0050] In this embodiment, the principle of performing steps S301-S304 is that, by classifying the working parameters detected from all the wheels, the first type parameters obtained represent working parameters of different wheels that are more different and more discrete in distribution, and the second type parameters represent working parameters of different wheels that are less different and more concentrated in distribution. For any second wheel, according to the working condition type of the first type parameters of the second wheel, the tire pressure measured values of the same working condition type are selected to be fitted with the corresponding second type parameters, and in fact, the tire pressure measured values of different working condition types are deleted (not participating in fitting), and the obtained tire pressure value-second type parameter fitting relationship is more consistent with the working condition of the second wheel, thereby facilitating obtaining more accurate tire pressure calculation values.

[0051] Therefore, by performing steps S301-S304, the characteristics of different working conditions of different wheels on the vehicle are considered (for example, the front wheels generally have a larger turning radius than the rear wheels, and the drive wheels generally have a larger acceleration than the non-drive wheels), and for any second wheel, those tire pressure measured values of the same working condition type as the working condition type that can appear are selected for fitting. Since the working condition types that can appear for different second wheels are generally not the same, different fitting methods are realized for different wheels, different tire pressure value-second type parameter fitting relationships are obtained, and the tire pressure value-second type parameter fitting relationship of each second wheel is obtained according to its own characteristics, thereby facilitating fine processing of the determination of the tire pressure calculation values of different second wheels and obtaining more detailed tire pressure monitoring effects.

[0052] In this embodiment, if the tire pressure sensor fails, causing the domain controller to work in the second detection mode, the domain controller cannot call the tire pressure sensor to obtain new tire pressure measured values. Then, the domain controller can perform historical data compensation processing according to the multiple tire pressure measured values (if the wheel is a first wheel) or multiple tire pressure calculation values (if the wheel is a second wheel) determined by the domain controller before in the first detection mode, to obtain the tire pressure prediction value of the wheel.

[0053] For example, taking the first wheel as an example, the domain controller in the second detection mode can perform a moving average filtering on the time series form of tire pressure measured values detected before for the first wheel, thereby obtaining the tire pressure prediction value of the first wheel, thereby maintaining the air pressure detection of the wheel after the tire pressure sensor fails, and realizing the failure redundancy mechanism.

[0054] In this embodiment, the domain controller in the second detection mode can also calculate the tire pressure difference (the difference value is taken as an absolute value) between the tire pressure prediction value of the first wheel and any tire pressure measured value detected before, and compare the relationship between the tire pressure difference and the threshold value. If the tire pressure difference is greater than the threshold value, the domain controller can perform an alarm. Specifically, refer to Figure 12The domain controller is connected to the central speed controller CSC via Ethernet. When executing an alarm, the domain controller can send a fault code to the central speed controller CSC, so that the central speed controller CSC can limit the car's speed and reduce the safety risks caused by abnormal air pressure, thereby realizing multi-level safety verification.

[0055] In this embodiment, a tire pressure detection method is provided, referring to Figure 5 , the tire pressure detection method includes the following steps: S1. Detecting the tire pressure of the first wheel of the vehicle to obtain the measured tire pressure value; S2 are detected for each wheel of the vehicle, to obtain the corresponding working parameter group for each wheel; the working parameter group includes multiple working parameters; S3. In the first detection mode, determine the calculated tire pressure of the second wheel based on the measured tire pressure, the operating parameter group corresponding to the first wheel, and the operating parameter group corresponding to the second wheel; the second wheel is a wheel other than the first wheel in the same vehicle.

[0056] The tire pressure detection method can be executed by a domain controller.

[0057] In this embodiment, the domain controller used can be a chassis domain controller (PDC), so that resources such as high-performance computing units and CAN FD high-speed communication interfaces can be reused to achieve real-time sharing of sensor data with modules such as the braking system and ESC. It can be powered by a unified power management module, reducing system power consumption and improving electromagnetic compatibility.

[0058] In this embodiment, the execution Figure 5 The computer program of the tire pressure detection method shown is stored in a computer device or a computer-readable storage medium, so that the tire pressure detection method can be executed by the computer device.

[0059] In this embodiment, the tire pressure detection system can be installed in a vehicle so that the tire pressure detection system forms an integral whole with other components of the vehicle. The vehicle has a tire pressure detection system that saves hardware costs and achieves the effect of multi-vehicle tire pressure detection.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0061] It should be noted that, as used in this disclosure and unless otherwise specified, an "and / or," where used, refers to a combination of that which is specified and / or one or more additional options. Only those components that have been specifically identified are essential to the realization of the implementation. Descriptions of a process flow, architecture, methodology, procedure, steps, or the like that have been introduced for purposes of clarity and / or ensuring that those components which are essential to the realization of the implementation are adequately described are optional, meaning that implementations can be realized with or without any or all of those specifically identified components that have been described in the context set forth herein.

[0062] It should be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited to these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. For example, a first element, component, region, layer or section could be termed a second element, component, region, layer or section without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language (e.g., "such as", "for instance", "like", etc.), provided herein, is intended merely to better illuminate the present disclosure and does not pose a limitation on the scope of the present disclosure unless otherwise claimed.

[0063] It should be appreciated that embodiments of the present application can be realized by a computer hardware, a combination of hardware and software, or by computer instructions stored on a non-transitory computer readable storage medium. The methods can be implemented using standard programming techniques - including the configuration of a non-transitory computer readable storage medium with computer program instructions configured to cause a computer to operate in a specific and predefined manner according to the methods described in the detailed embodiments and the drawings. Each program can be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the programs can be implemented in assembly or machine language, if desired. In any case, the language can be a compiled or interpreted language. Furthermore, the programs can be able to run on a programmed special purpose integrated circuit.

[0064] Further, the operations of the processes described in this embodiment can be performed in any suitable order, unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and / or combinations thereof) can be implemented under the control of one or more computer systems configured with executable instructions (e.g., computer programs, one or more computer programs, or one or more applications) to perform the functionality described herein, and can be implemented completely or partially using hardware, or a combination thereof. Computer programs include machine instructions that can be executed by one or more processors.

[0065] Further, the methods can be implemented in any suitable type of computing platform operatively coupled to any suitable type of computing platform, including but not limited to a personal computer, a mini-computer, a mainframe, a workstation, a network or distributed computing environment, a stand-alone or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the present application can be implemented in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated to the computing platform, such as a hard disk, an optical read and / or write storage medium, RAM, ROM, and the like, such that it can be read by a programmable computer to configure and operate the computer to perform the processes described herein when the storage medium or device is read by the computer. Further, the machine-readable code, or portions thereof, can be transmitted over wired or wireless networks. The present application encompasses these and other different types of non-transitory computer-readable storage media when the instructions or programs implementing the above steps are included in conjunction with a microprocessor or other data processor. The present application also encompasses the computer itself when programmed in accordance with the methods and techniques of the present application.

[0066] The computer programs are capable of applying to input data to perform the functions of the present embodiment, thereby transforming the input data to generate output data that is stored to non-volatile memory. The output information can also be applied to one or more output devices, such as a display. In preferred embodiments of the present application, the transformed data represents a physical and tangible object, including a particular visual depiction of the physical and tangible object produced on a display.

[0067] The above merely preferred embodiments of the present application and are not intended to limit the present application thereto. The present application is not limited to the embodiments described above, but any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included in the scope of the present application. The technical solutions and / or embodiments of the present application can have various modifications and changes within the scope of the present application.

Claims

1. A tire pressure monitoring system, characterized in that: The tire pressure detection system includes: Tire pressure sensor; the tire pressure sensor is used to detect the tire pressure of the first wheel in the vehicle and obtain a measured tire pressure value; Multiple sensor groups; the sensor groups include multiple parameter sensors, each of the sensor groups is used to detect a corresponding wheel in the vehicle to obtain an operating parameter group; the operating parameter group includes the operating parameters detected by each of the parameter sensors in the sensor group; Domain controller; the domain controller is used to determine the calculated tire pressure value of the second wheel based on the actual tire pressure value, the working parameter group corresponding to the first wheel and the working parameter group corresponding to the second wheel in the first detection mode; the second wheel is a wheel other than the first wheel in the same vehicle.

2. The tire pressure monitoring system according to claim 1, wherein: The domain controller is configured to, in a second detection mode, obtain, for any wheel of the vehicle, a plurality of determined measured tire pressure values ​​or a plurality of calculated tire pressure values ​​of the wheel, perform historical data compensation processing on the plurality of tire pressure values ​​or the plurality of calculated tire pressure values, and obtain a predicted tire pressure value of the wheel; The domain controller is used to obtain the tire pressure difference between the predicted tire pressure value and the measured tire pressure value of the first wheel in the second detection mode, and to issue an alarm when the tire pressure difference is greater than a threshold.

3. The tire pressure monitoring system according to claim 2, wherein: The domain controller is used to detect the working effectiveness of the tire pressure sensor. When it is detected that the tire pressure sensor is valid, the first detection mode is triggered to be executed. When it is detected that the tire pressure sensor is invalid, the second detection mode is triggered to be executed.

4. The tire pressure monitoring system according to any one of claims 1 to 3, characterized in that: The tire pressure sensor is used to perform detection at multiple sampling moments to obtain the tire pressure measured value in the form of a time series; The sensor group is used to perform detection at the same sampling moment to obtain the working parameter group in the form of a time series.

5. The tire pressure monitoring system according to claim 4, characterized in that: The determining the calculated tire pressure value of the second wheel according to the measured tire pressure value, the operating parameter group corresponding to the first wheel, and the operating parameter group corresponding to the second wheel includes: Classifying all the operating parameters into first type parameters or second type parameters; Clustering is performed using the portion of the first type of parameters in each of the operating parameter groups as a unit to obtain at least one cluster center, and determining a corresponding operating condition type according to each cluster center; For any of the measured tire pressure values, marking the measured tire pressure value according to the operating condition type corresponding to the operating parameter group of the first wheel detected at the same sampling moment and the operating parameter belonging to the second type in the operating parameter group of the first wheel; For any second wheel, based on the working condition type corresponding to the working parameter group of the second wheel, the measured tire pressure values ​​marked with the same working condition type are filtered out, and the filtered measured tire pressure values ​​and the marked working parameters are fitted to obtain a tire pressure value-second type parameter fitting relationship. Based on the tire pressure value-second type parameter fitting relationship and the working parameters of the second wheel belonging to the second type parameters, the calculated tire pressure value of the second wheel is determined.

6. The tire pressure monitoring system according to claim 5, characterized in that: The dividing all the working parameters into first type parameters or second type parameters includes: Traverse all parameter types; For any of the parameter types, the working parameters belonging to the parameter type detected by the same sensor group form the same set. When the intersection of all the sets is empty, all the working parameters belonging to the parameter type are classified as the first type parameters. Conversely, when the intersection of all the sets is not empty, all the working parameters belonging to the parameter type are classified as the second type parameters.

7. A tire pressure detection method, characterized in that: The tire pressure detection method comprises: detecting a tire pressure of a first wheel in the vehicle to obtain a measured tire pressure value; Detecting each wheel of the vehicle separately to obtain a working parameter group corresponding to each wheel; the working parameter group includes a plurality of working parameters; In the first detection mode, the calculated tire pressure value of the second wheel is determined based on the actual tire pressure value, the working parameter group corresponding to the first wheel, and the working parameter group corresponding to the second wheel; the second wheel is a wheel other than the first wheel in the same vehicle.

8. A computer device, characterized in that: The device comprises a memory and a processor, wherein the memory is used to store at least one program, and the processor is used to load at least one program to execute the tire pressure detection method according to claim 7.

9. A computer-readable storage medium storing a program executable by a processor, characterized in that: The program executable by the processor is used to perform the tire pressure detection method according to claim 7 when executed by the processor.

10. A vehicle, characterized in that: The vehicle includes the tire pressure monitoring system according to any one of claims 1 to 6.

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