System and method for monitoring tire pressure of hybrid passenger car
By integrating wheel speed signal model and sensor data in the vehicle tire pressure monitoring system, and introducing a dynamic compensation function and dual-system redundancy mechanism, a hybrid tire pressure monitoring system is designed, which solves the problems of high cost, poor reliability or insufficient accuracy in the existing system, and achieves a low-cost, high-precision and anti-interference tire pressure monitoring effect.
Patent Information
- Application Number
- CN202510428636.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-06-10
AI Technical Summary
The existing vehicle tire pressure monitoring system has problems such as high cost, poor reliability or insufficient accuracy.
By integrating the wheel speed signal model and sensor data, and introducing a dynamic compensation function and dual-system redundancy mechanism, a hybrid tire pressure monitoring system is designed. The system includes a pulse sequence acquisition module, a pressure model construction module, a compensation function acquisition module and a tire pressure monitoring module. Through the coordinated work of these modules, low-cost, high-precision and anti-interference tire pressure monitoring can be achieved.
Low-cost, high-precision and anti-interference tire pressure monitoring are achieved, avoiding the problems of high cost, poor reliability or insufficient accuracy in traditional systems, and improving vehicle safety and economy.
Smart Images
Figure CN120116664A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of monitoring systems, and specifically relates to a monitoring system and method for the tire pressure of hybrid passenger vehicles. Background Art
[0002] As the only medium for a vehicle to contact the road surface, the tire plays an important role in supporting the weight of the vehicle and buffering the road unevenness. At the same time, it also has a direct and significant impact on the performance of the vehicle such as driving, braking, steering, and handling stability. Tire pressure is an important indicator affecting tire performance. When the tire pressure deviates from the normal value, not only the economic performance and service life will be reduced to a certain extent, but also safety hazards will be brought to the driving of the vehicle. Currently, the mainstream TPMS on the market is divided into two categories: the direct tire pressure monitoring system D-TPMS and the indirect tire pressure monitoring system I-TPMS. Among them, D-TPMS directly obtains real-time air pressure by installing pressure sensors in all tires, which is a direct and relatively reliable solution. While I-TPMS indirectly infers the change of tire pressure through wheel pulse counters and vehicle driving states, and it has no additional material cost.
[0003] At the same time, these two types of TPMS also have their own defects: for D-TPMS, since it is necessary to install tire pressure sensors on each wheel, the cost of the system is inevitably increased. In addition, integrating a module including power supply, sensor, signal processing, and radio frequency transmission on the tire assembly faces challenges in battery life and reliability. And once any sensor fails, the entire system will not be able to continue working; for I-TPMS, since there is no true value reference of tire pressure during the working process, the mainstream solution can only qualitatively analyze and estimate the under-inflation situation of the tire based on the wheel speed signal to calculate the tire rolling radius and frequency domain characteristics, and there are risks of alarm time lag, false alarm, and missed alarm. Based on the development status and performance of the above two types of TPMS, it is necessary to design a TPMS solution that avoids the defects of both and integrates their advantages.
[0004] Therefore, in the prior art, there are technical problems such as high cost, poor reliability, or insufficient accuracy in the monitoring solutions for vehicle tire pressure. Summary of the Invention
[0005] This application provides a monitoring system and method for the tire pressure of hybrid passenger vehicles, which solves the technical problems of high cost, poor reliability, or insufficient accuracy in the monitoring solutions for vehicle tire pressure in the prior art. By integrating the wheel speed signal model and sensor data, and introducing a dynamic compensation function and a dual-system redundancy mechanism, a hybrid tire pressure monitoring with low cost, high accuracy, and anti-interference is realized.
[0006] In the first aspect of the present application, a hybrid passenger car tire pressure monitoring system is provided, including: a pulse sequence acquisition module, configured to intercept the wheel pulse signals of each wheel within a preset time period, and perform screening according to a preset screening mechanism to generate the target wheel pulse sequence of each wheel; a pressure model construction module, configured to calculate the preset wheel rolling parameters for each wheel based on the target wheel pulse sequence, and construct a tire pressure model for each wheel according to the preset wheel rolling parameters; a compensation function acquisition module, configured to use the tire pressure sensors arranged on each wheel to collect the true average tire pressure within the preset time period, correct the tire pressure model, and construct a compensation function between the true pressure and the model pressure; a tire pressure monitoring module, configured to construct a fusion dual system with the tire pressure model, the compensation function, and the tire pressure sensors to monitor the vehicle tire pressure.
[0007] In an implementation manner, the tire pressure monitoring module is further configured to: if the pressure sensor single system sends a fault signal, calculate the real-time tire pressure based on the tire pressure model and the compensation function; if the wheel pulse counter single system sends a fault signal, perform real-time pressure monitoring through the pressure sensor single system.
[0008] In an implementation manner, the pulse sequence acquisition module is further configured to: construct a preset screening rule, where the preset screening rule includes a steady-state driving screening condition, a steering screening condition, a speed screening condition, and a pulse mutation screening condition; construct a condition discriminator for the preset screening rule; establish the preset screening mechanism with the condition discriminator and the preset screening rule; screen the wheel pulse signals of each wheel through the preset screening mechanism to generate the target wheel pulse sequence.
[0009] In an implementation manner, the pressure model construction module is further configured to: perform differential calculation on the target wheel pulse sequence of each wheel to calculate the rotational speed of each wheel; calculate the rolling radius of each wheel based on the rotational speed of each wheel; perform a fast Fourier transform on the rotational speed of each wheel, screen the peak value and the corresponding abscissa within each tire circumferential frequency band, and combine them with the rolling radius of each wheel respectively to obtain the preset wheel rolling parameters.
[0010] In an implementation manner, the pressure model construction module is further configured to: perform vehicle speed segmentation for the preset wheel rolling parameters to generate the wheel rolling parameters corresponding to each vehicle speed segment; solve the pressure model coefficients of each vehicle speed segment based on the wheel rolling parameters corresponding to each vehicle speed segment to generate the tire pressure model of each wheel.
[0011] In an implementation manner, the compensation function acquisition module is further configured to: collect the true average tire pressure within the preset time period, calculate the model pressure through the tire pressure model, and construct multiple groups of mapping data, where any group of mapping data includes the true average tire pressure and the model pressure with a corresponding relationship; based on the multiple groups of mapping data, construct a compensation function between the true pressure and the model pressure through linear fitting.
[0012] In an implementation manner, the compensation function acquisition module is further configured to: synchronize the sampling time when obtaining a group of true average tire pressure and model pressure with a corresponding relationship.
[0013] In a second aspect of the present application, a method for monitoring the tire pressure of a hybrid passenger vehicle is provided. The method includes: intercepting the wheel pulse signals of each wheel within a preset time period, and screening them according to a preset screening mechanism to generate a target wheel pulse sequence for each wheel; calculating preset wheel rolling parameters for each wheel based on the target wheel pulse sequence, and constructing a tire pressure model for each wheel according to the preset wheel rolling parameters; using the tire pressure sensors arranged on each wheel to collect the true average tire pressure within the preset time period, correcting the tire pressure model, and constructing a compensation function between the true pressure and the model pressure; constructing a fusion dual system with the tire pressure model, the compensation function, and the tire pressure sensors to monitor the tire pressure of the vehicle.
[0014] It is intended to solve the technical problems that the existing vehicle tire pressure monitoring solutions have high costs, poor reliability, or insufficient accuracy through a monitoring system and method for the tire pressure of a hybrid passenger vehicle proposed in the present application. By fusing the wheel speed signal model and sensor data, and introducing a dynamic compensation function and a dual-system redundancy mechanism, a low-cost, high-precision, and anti-interference hybrid tire pressure monitoring is realized. The pulse sequence acquisition module is used to intercept the wheel pulse signals of each wheel within a preset time period and screen them according to a preset screening mechanism to generate a target wheel pulse sequence for each wheel; the pressure model construction module is used to calculate preset wheel rolling parameters for each wheel based on the target wheel pulse sequence and construct a tire pressure model for each wheel according to the preset wheel rolling parameters; the compensation function acquisition module is used to use the tire pressure sensors arranged on each wheel to collect the true average tire pressure within the preset time period, correct the tire pressure model, and construct a compensation function between the true pressure and the model pressure; the tire pressure monitoring module is used to construct a fusion dual system with the tire pressure model, the compensation function, and the tire pressure sensors to monitor the tire pressure of the vehicle. Description of the Drawings
[0015] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings of the embodiments of the present disclosure will be briefly introduced below. Flowcharts are used in this application to illustrate the operations performed by the systems according to the embodiments of the present application. It should be understood that the operations described above or below do not necessarily have to be executed precisely in order. Instead, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or one or more steps can be removed from these processes.
[0016] Figure 1 Schematic structural diagram of a hybrid passenger car tire pressure monitoring system provided by an embodiment of the present application;
[0017] Figure 2 Schematic flowchart of a hybrid passenger car tire pressure monitoring method provided by an embodiment of the present application;
[0018] Figure 3 Schematic flowchart of the implementation of a dual - system for a hybrid passenger car tire pressure monitoring method provided by an embodiment of the present application.
[0019] Explanation of reference numerals: Pulse sequence acquisition module 11, pressure model construction module 12, compensation function acquisition module 13, tire pressure monitoring module 14. Detailed implementation manners
[0020] The above description is only an overview of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically gives the detailed implementation manners of the present application.
[0021] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.
[0022] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments. However, it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict. The terms "first" and "second" are only used to distinguish similar objects and do not represent a specific order for the objects. The terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or devices. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application.
[0023] Embodiments of this application provide a monitoring system and method for the tire pressure of a hybrid passenger vehicle, as Figure 2 、 Figure 3 shown. The method includes:
[0024] Intercept the wheel pulse signals of each wheel within a preset time period and perform screening according to a preset screening mechanism to generate the target wheel pulse sequence for each wheel; calculate the preset wheel rolling parameters for each wheel based on the target wheel pulse sequence, and construct the tire pressure model for each wheel according to the preset wheel rolling parameters.
[0025] Intercept the wheel pulse signals of each wheel within a preset time period, that is, obtain the wheel pulse signals of all wheels within the preset time period. For example, if the preset time period is 30 seconds, the wheel pulse signals of the wheels are truncated in cycles of 30 seconds. The wheel speed sensor generates a pulse signal for each wheel rotation, and each pulse corresponds to a certain angle of wheel rotation. The wheel pulse signals of the wheels are screened through a preset screening mechanism to obtain the wheel pulse signals of each wheel that meet the conditions, and generate the target wheel pulse sequence for each wheel. Subsequently, calculate the preset wheel rolling parameters for each wheel based on the target wheel pulse sequence, obtain the rolling radius of the wheel, the wheel speed, and the peak value within the tire circumferential frequency band and the corresponding abscissa, and construct the tire pressure model for each wheel according to the preset wheel rolling parameters.
[0026] The method provided by the embodiment of the present application further includes: constructing a preset screening rule, where the preset screening rule includes a steady-state driving screening condition, a steering screening condition, a speed screening condition, and a pulse mutation screening condition; constructing a condition judge for the preset screening rule; establishing the preset screening mechanism with the condition judge and the preset screening rule; screening the wheel pulse signals of each wheel through the preset screening mechanism to generate the target wheel pulse sequence.
[0027] Construct a preset screening rule, which includes a steady-state driving screening condition, a steering screening condition, a speed screening condition, and a pulse mutation screening condition. The steady-state driving screening condition is that the vehicle is driving in a steady state without sudden acceleration, sudden deceleration, or skidding. The steering screening condition is that the vehicle is not steering at a large angle. The speed screening condition is that the driving speed is greater than a set threshold. The pulse mutation screening condition is that there is no mutation in the wheel pulse record. Construct a condition judge for the preset screening rule. The condition judge is used to screen the wheel pulse signals of the wheels according to the judgment rules corresponding to the screening conditions. The steady-state driving screening condition is judged by monitoring the inertial sensor and ESP status of the vehicle. The steering screening condition is judged by monitoring the steering wheel angle of the vehicle. The speed screening condition is judged by reading the internal signal of the ESP or the vehicle speed from the CAN. The pulse mutation screening condition is judged by setting the allowable interval value of the difference between adjacent wheel pulse time intervals. When it is within the allowable interval value, there is no mutation, otherwise there is a mutation. Establish the preset screening mechanism with the condition judge and the preset screening rule. Finally, screen the wheel pulse signals of each wheel through the preset screening mechanism to generate the target wheel pulse sequence.
[0028] The method provided by the embodiment of the present application further includes: performing differential calculation on the target wheel pulse sequences of each wheel to obtain the rotational speeds of each wheel; calculating the rolling radius of each wheel based on the rotational speeds of each wheel; performing a fast Fourier transform on the rotational speeds of each wheel, screening the peaks and corresponding abscissas in each tire circumferential frequency band, and respectively combining them with the rolling radii of each wheel to obtain the preset wheel rolling parameters.
[0029] Calculating the preset wheel rolling parameters for each wheel based on the target wheel pulse sequence includes: performing differential calculation on the target wheel pulse sequences of each wheel to obtain the rotational speeds of each wheel. The target wheel pulse sequence of the i-th (i = 1, 2, 3, 4) wheel is differentiated to obtain the rotational speed ω of each wheel. i , Subsequently, through the formula R i = v i / ω i the rolling radius R of the i-th wheel is calculated. i , where, v iis the wheel linear speed after passing through the small curve compensation. Further, the speed of each wheel is subjected to fast Fourier transform, and the peak value A in the ith tire circumferential frequency band is obtained from the obtained frequency domain signal. i The corresponding horizontal coordinate f i , and are combined with the rolling radius of each wheel to obtain the preset wheel rolling parameter R of the mathematical model for estimating the i-th tire pressure i , A i and f i .
[0030] The method provided in the embodiment of the present application also includes: segmenting the vehicle speed according to the preset wheel rolling parameters, and generating wheel rolling parameters corresponding to each speed segment; based on the wheel rolling parameters corresponding to each speed segment, solving the pressure model coefficient of each speed segment, and generating a tire pressure model of each wheel.
[0031] The tire pressure model of each wheel is constructed according to the preset wheel rolling parameters, including: segmenting the vehicle speed according to the preset wheel rolling parameters, and dividing the vehicle speed into different speed intervals. According to the vehicle speed corresponding to the preset wheel rolling parameters, the wheel rolling parameters corresponding to each speed segment are generated. Further, based on the wheel rolling parameters corresponding to each speed segment, the pressure model coefficients of each speed segment are solved to generate the tire pressure model of each wheel. The pressure model formula is as follows:
[0032]
[0033] Where v is the speed of the vehicle, R i is the rolling radius of the i-th wheel, and f i is the peak value A in the ith tire circumferential frequency band i The corresponding horizontal axis. i is the peak value in the circumferential frequency band of the i-th tire. j , b j With c j is the pressure model coefficient. Where i = 1, 2, 3, 4. j is the different speed ranges, j = 1, 2, 3.... i is the pressure of each tire obtained by calculation. ω is the preset weight parameter.
[0034] The method provided in the embodiment of the present application also includes: using tire pressure sensors arranged on each wheel to collect the actual average tire pressure within the preset time period, correcting the tire pressure model, and constructing a compensation function between the actual pressure and the model pressure; constructing a fusion dual system with the tire pressure model, the compensation function and the tire pressure sensor to monitor the tire pressure.
[0035] The tire pressure sensors arranged on each wheel are used to collect the actual average tire pressure P within the preset time period. i,True . The real average tire pressure within a preset time period is input into the tire pressure model for correction, and a compensation function between the real pressure and the model pressure is constructed. That is, the tire pressure obtained by the tire pressure model is combined with the real average tire pressure within the corresponding preset time period to construct a compensation function for the two. Finally, after determining the tire model pressure and the compensation function, a fusion dual system is constructed with the tire pressure model, the compensation function and the tire pressure sensor to monitor the tire pressure. The fusion dual system includes a single pressure sensor system and a single wheel pulse counter system. If the single pressure sensor system sends a fault signal, the real-time tire pressure is calculated based on the tire pressure model and the compensation function. If the single wheel pulse counter system sends a fault signal, the real-time pressure monitoring is performed through the single pressure sensor system. Taking the example of only one tire pressure sensor in the tire, if the tire pressure sensor fails or is abnormal, the system can calculate the real-time tire pressure through the tire pressure model and the compensation function based on the wheel speed. If the wheel speed sensor of the tire fails or is abnormal, the system can directly perform real-time pressure monitoring through the tire pressure sensor. The redundant mechanism of the integrated dual system enables the vehicle to accurately and efficiently monitor the real-time tire pressure when the tire pressure sensor fails or the pulse sensor on its upper wheel is abnormal. By introducing a single tire pressure sensor, the tire pressure value obtained by the indirect tire pressure monitoring system is corrected. Compared with the current indirect tire pressure monitoring system, the dual system can obtain the tire pressure of all tires in real time and accurately. Based on the real-time tire pressure correction model, the dual system can accurately and efficiently detect tire pressure and issue an alarm to reduce the probability of accidents. Compared with the direct tire pressure monitoring system, the dual system saves the installation and maintenance costs of 3 tire pressure sensors. Through the redundant mechanism of the dual system, when the tire pressure sensor or its upper wheel pulse counter fails, it can still work and provide real-time tire pressure, improving the reliability of the system.
[0036] The method provided in the embodiment of the present application also includes: collecting the real average tire pressure within the preset time period, and calculating the model pressure through the tire pressure model, and constructing multiple sets of mapping data, wherein any set of mapping data includes the real average tire pressure and the model pressure with a corresponding relationship; based on the multiple sets of mapping data, constructing a compensation function between the real pressure and the model pressure through linear fitting.
[0037] Using tire pressure sensors arranged on each wheel, for a vehicle, only one of the wheels needs to be equipped with a tire pressure sensor, collects the real average tire pressure within the preset time period, calibrates the tire pressure model, and constructs a compensation function between the real pressure and the model pressure, including: the tire pressure value directly measured by the TPMS sensor, by averaging multiple sampling results within the preset time period, to obtain the real average tire pressure. Subsequently, the model pressure is calculated by the tire pressure model, and the pressure model output pressure value P corresponding to the preset time period is obtained. i The actual average tire pressure P i,True , and construct multiple groups of mapping data according to the multiple groups of mapping relationships. Among them, any group of mapping data includes a real average tire pressure and a model pressure with a corresponding relationship. In addition, when obtaining a set of real average tire pressure and model pressure with a corresponding relationship, the sampling time needs to be synchronized to ensure the accuracy of the corresponding relationship. Finally, based on the multiple groups of mapping data, a compensation function between the real pressure and the model pressure is constructed by linear fitting. Specifically, due to the real pressure and the model pressure of the tire, when the pressure data is collected sufficiently, all coefficients of the compensation function can be obtained by linear fitting to obtain values allowed by the error range. Among them, when the sensor input signal is credible and the model pressure estimated by the wheel speed sensor is reduced, the real pressure obtained by the pressure sensor will inevitably decrease. Therefore, the compensation function here can be approximated as a linear function. The compensation function is g(P i )=A*P i +B j , A is the coefficient of the compensation function, and the constant term B j It is a function related to vehicle speed and corresponds to the speed range. After the compensation function coefficient is determined, the actual tire pressure P i,True With model pressure P i The relationship between i,True =g(P i ), i=2, 3, 4 to obtain the air pressure of the remaining tires.
[0038] In the above, refer to Figure 2 A method for monitoring tire pressure of a hybrid passenger vehicle according to an embodiment of the present invention is described in detail. Figure 1 A hybrid passenger vehicle tire pressure monitoring system according to an embodiment of the present invention is described.
[0039] A hybrid tire pressure monitoring system for passenger cars according to an embodiment of the present invention solves the technical problems of high cost, poor reliability, or insufficient accuracy in the existing vehicle tire pressure monitoring solutions. By integrating the wheel speed signal model and sensor data, and introducing a dynamic compensation function and a dual-system redundancy mechanism, a hybrid tire pressure monitoring with low cost, high accuracy, and anti-interference is achieved. A hybrid tire pressure monitoring system for passenger cars includes: a pulse sequence acquisition module 11, a pressure model construction module 12, a compensation function acquisition module 13, and a tire pressure monitoring module 14.
[0040] The pulse sequence acquisition module 11 is configured to intercept the wheel pulse signals of each wheel within a preset time period, and perform screening according to a preset screening mechanism to generate the target wheel pulse sequence of each wheel;
[0041] The pressure model construction module 12 is configured to calculate preset wheel rolling parameters for each wheel based on the target wheel pulse sequence, and construct a tire pressure model for each wheel according to the preset wheel rolling parameters;
[0042] The compensation function acquisition module 13 is configured to use the tire pressure sensors arranged on each wheel to collect the real average tire pressure within the preset time period, correct the tire pressure model, and construct a compensation function between the real pressure and the model pressure;
[0043] The tire pressure monitoring module 14 is configured to construct a fusion dual system with the tire pressure model, the compensation function, and the tire pressure sensors to monitor the vehicle tire pressure.
[0044] Next, the specific configuration of the tire pressure monitoring module 14 will be further described in detail. The tire pressure monitoring module 14 further includes: calculating the real-time tire pressure based on the tire pressure model and the compensation function if the single system of the pressure sensor sends a fault signal; performing real-time pressure monitoring through the single system of the pressure sensor if the single system of the wheel pulse counter sends a fault signal.
[0045] Next, the specific configuration of the pulse sequence acquisition module 11 will be described in detail. The pulse sequence acquisition module 11 may further include: constructing a preset screening rule, where the preset screening rule includes a steady-state driving screening condition, a steering screening condition, a speed screening condition, and a pulse mutation screening condition; constructing a condition judgment device for the preset screening rule; establishing the preset screening mechanism with the condition judgment device and the preset screening rule; and screening the wheel pulse signals of each wheel through the preset screening mechanism to generate the target wheel pulse sequence.
[0046] Next, the specific configuration of the pressure model construction module 12 will be described in detail. The pressure model construction module 12 may further include: calculating the rotational speeds of the respective wheels by differentiating the target wheel pulse sequences of the respective wheels; calculating the rolling radii of the respective wheels based on the rotational speeds of the respective wheels; performing a fast Fourier transform on the rotational speeds of the respective wheels, screening the peaks and corresponding abscissas within the respective tire circumferential frequency bands, and respectively combining them with the rolling radii of the respective wheels to obtain the preset wheel rolling parameters.
[0047] Next, the specific configuration of the pressure model construction module 12 will be described in detail. The pressure model construction module 12 may further include: segmenting the vehicle speed for the preset wheel rolling parameters to generate the wheel rolling parameters corresponding to the respective vehicle speed segments; solving the pressure model coefficients for the respective vehicle speed segments based on the wheel rolling parameters corresponding to the respective vehicle speed segments to generate the tire pressure models for the respective wheels.
[0048] Next, the specific configuration of the compensation function acquisition module 13 will be described in detail. The compensation function acquisition module 13 further includes: collecting the true average tire pressure within the preset time period, calculating the model pressure through the tire pressure model, and constructing multiple sets of mapping data, where any set of mapping data includes the true average tire pressure and the model pressure with a corresponding relationship; constructing a compensation function between the true pressure and the model pressure through linear fitting based on the multiple sets of mapping data.
[0049] Next, the specific configuration of the compensation function acquisition module 13 will be described in detail. The compensation function acquisition module 13 further includes: obtaining the time for synchronous sampling when obtaining a set of true average tire pressure and model pressure with a corresponding relationship.
[0050] The hybrid passenger car tire pressure monitoring system provided by the embodiments of the present invention can execute the hybrid passenger car tire pressure monitoring method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.
[0051] Although the present application makes various references to certain modules in the system according to the embodiments of the present application, however, any number of different modules can be used and run on the user terminal and / or the server. The respective units and modules included are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be achieved. In addition, the specific names of the respective functional units are only for the convenience of mutual distinction and do not limit the protection scope of the present invention.
[0052] The above specific embodiments do not constitute a limitation on the protection scope of this application. Those skilled in the art should understand that various modifications, combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of this application shall be included within the protection scope of this application.
Claims
1. A hybrid passenger car tire pressure monitoring system, characterized in that: include: A pulse sequence acquisition module is used to intercept the wheel pulse signal of each wheel within a preset time period, and screen it according to a preset screening mechanism to generate a target wheel pulse sequence for each wheel; A pressure model building module, used to calculate preset wheel rolling parameters for each wheel based on the target wheel pulse sequence, and build a tire pressure model for each wheel according to the preset wheel rolling parameters; A compensation function acquisition module, used to collect the real average tire pressure within the preset time period using the tire pressure sensors arranged on each wheel, calibrate the tire pressure model, and construct a compensation function between the real pressure and the model pressure; The tire pressure monitoring module is used to build a fusion dual system with the tire pressure model, the compensation function and the tire pressure sensor to monitor the tire pressure.
2. A hybrid passenger vehicle tire pressure monitoring system as claimed in claim 1, characterized in that: The tire pressure monitoring module is also used for: If the pressure sensor single system sends a fault signal, calculating the real-time tire pressure based on the tire pressure model and the compensation function; If the wheel pulse counter single system sends out a fault signal, real-time pressure monitoring is performed through the pressure sensor single system.
3. A hybrid passenger vehicle tire pressure monitoring system as claimed in claim 1, characterized in that: The pulse sequence acquisition module is also used for: Constructing preset screening rules, wherein the preset screening rules include steady-state driving screening conditions, turning screening conditions, speed screening conditions, and pulse mutation screening conditions; According to the preset screening rules, a condition judger is constructed; Establishing the preset screening mechanism with the condition judger and the preset screening rule; The wheel pulse signals of each wheel are screened by the preset screening mechanism to generate the target wheel pulse sequence.
4. A hybrid passenger vehicle tire pressure monitoring system as claimed in claim 1, characterized in that: The pressure model building module is also used to: Differentiating the target wheel pulse sequence of each wheel to calculate the rotation speed of each wheel; Calculating the rolling radius of each wheel based on the rotation speed of each wheel; Performing a fast Fourier transform on the rotation speeds of the wheels, selecting peak values and corresponding horizontal coordinates in the circumferential frequency bands of the tires, and combining them with the rolling radii of the wheels to obtain the preset wheel rolling parameters.
5. A hybrid passenger vehicle tire pressure monitoring system as claimed in claim 4, characterized in that: The pressure model building module is also used to: According to the preset wheel rolling parameters, the vehicle speed is segmented to generate the wheel rolling parameters corresponding to each vehicle speed segment; Based on the wheel rolling parameters corresponding to the various vehicle speed sections, the pressure model coefficients of the various vehicle speed sections are solved to generate the tire pressure models of the various wheels.
6. A hybrid passenger vehicle tire pressure monitoring system as claimed in claim 1, characterized in that: The compensation function acquisition module is also used for: Collecting the real average tire pressure within the preset time period, and calculating the model pressure through the tire pressure model, to construct multiple groups of mapping data, wherein any group of mapping data includes the real average tire pressure and the model pressure having a corresponding relationship; Based on the multiple sets of mapping data, a compensation function between the real pressure and the model pressure is constructed by linear fitting.
7. A hybrid passenger vehicle tire pressure monitoring system as claimed in claim 6, characterized in that: The compensation function acquisition module is also used for: obtaining a set of corresponding real average tire pressures and model pressures, which requires synchronous sampling time.
8. A method for monitoring tire pressure of a hybrid passenger vehicle, characterized in that: The method comprises: Intercepting the wheel pulse signal of each wheel within a preset time period, and screening it according to a preset screening mechanism to generate a target wheel pulse sequence for each wheel; Calculating preset wheel rolling parameters for each wheel based on the target wheel pulse sequence, and constructing a tire pressure model for each wheel according to the preset wheel rolling parameters; Using tire pressure sensors arranged on each wheel to collect the real average tire pressure within the preset time period, calibrate the tire pressure model, and construct a compensation function between the real pressure and the model pressure; A fusion dual system is constructed with the tire pressure model, the compensation function and the tire pressure sensor to monitor the tire pressure.