Indirect tire pressure monitoring methods, devices, electronic equipment and storage media

Abstract

This invention provides an indirect tire pressure detection method, comprising the following steps: acquiring first detection information from a first sensor group, the first detection information including multiple stationary target speeds; acquiring second detection information from a second sensor group, the second detection information including wheel speed of each tire, slip ratio of each tire, and reference vehicle speed; filtering the multiple stationary target speeds, calculating an average speed based on the filtered multiple stationary target speeds; and determining whether a warning operation is required based on the wheel speed, slip ratio, and the calculated average speed from the second detection information.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to indirect tire pressure monitoring methods, devices, electronic equipment, and storage media. Background Technology

[0002] During vehicle operation, tire pressure is a crucial factor affecting driving safety. Abnormal tire pressure is a major concern for drivers and the most difficult problem to prevent, as well as a significant cause of sudden traffic accidents. Therefore, tire pressure monitoring has become an indispensable safety safeguard for both vehicles and drivers.

[0003] Currently, there are two main types of tire pressure monitoring systems on the market: direct tire pressure monitoring and indirect tire pressure monitoring. Direct tire pressure monitoring typically requires installing a tire pressure sensor on each wheel, along with a tire pressure signal receiving and processing system to monitor tire pressure. This method is prohibitively expensive. Indirect tire pressure monitoring uses wheel speed sensors to estimate vehicle and wheel speeds, and calculates tire pressure through self-learning. However, this method suffers from calculation lag, and the system cannot monitor tire pressure during the learning process. Complex road conditions also affect the accuracy of the calculations. Furthermore, it cannot detect tire pressure issues on multiple vehicles simultaneously. Summary of the Invention

[0004] The present invention was made to solve the above-mentioned problems, and its purpose is to provide an indirect tire pressure detection method, device, electronic device and storage medium that can accurately and cost-effectively detect tire pressure.

[0005] According to one aspect of the present invention, an indirect tire pressure detection method is provided, comprising the following steps: acquiring first detection information from a first sensor group, the first detection information including multiple stationary target speeds; acquiring second detection information from a second sensor group, the second detection information including wheel speeds of each tire, slip ratios of each tire, and reference vehicle speed values; filtering the multiple stationary target speeds, calculating an average speed based on the filtered multiple stationary target speeds; and determining whether a warning operation is required based on the wheel speeds, slip ratios, and the calculated average speed from the second detection information.

[0006] Preferably, filtering multiple stationary target speeds and calculating the average speed based on the filtered multiple stationary target speeds includes: comparing the multiple stationary target speeds in the first detection information with the reference vehicle speed value of the second detection information respectively; removing stationary target speeds whose deviation from the reference vehicle speed value is greater than a preset deviation threshold, thereby obtaining multiple remaining stationary target speeds; calculating the variance of the multiple remaining stationary target speeds; selecting the remaining stationary target speeds that fall within two variance intervals (positive and negative) as the selected stationary target speeds; and calculating the average value of the selected stationary target speeds as the average speed.

[0007] Preferably, the determination of whether a warning operation is needed based on the wheel speed, the slip ratio, and the calculated average speed value of the second detection information includes: determining whether the slip ratio of each tire is less than a preset slip threshold; if the slip ratio of a certain tire is less than the preset slip threshold, determining whether the difference between the wheel speed of that tire and the average speed value is within a first range; if the slip ratio of a certain tire is greater than or equal to the preset slip threshold, determining whether the difference between the wheel speed of that tire and the average speed value is within a second range; and if the difference value is not within the first range or the difference value is not within the second range, then a warning operation is performed.

[0008] Preferably, the difference value is calculated using the following formula:

[0009] (Tire wheel speed - average speed) / average speed.

[0010] Preferably, the first range is smaller than the second range and is included by the second range.

[0011] Preferably, the first sensor group includes at least one of a millimeter-wave radar, a camera, and a lidar.

[0012] Preferably, the second sensor group includes a wheel speed sensor.

[0013] According to another aspect of the present invention, an indirect tire pressure monitoring device is provided, comprising: a first acquisition module for acquiring first detection information from a first sensor group, the first detection information including multiple stationary target speeds; a second acquisition module for acquiring second detection information from a second sensor group, the second detection information including wheel speeds of each tire, slip ratios of each tire, and reference vehicle speed values; a calculation module for filtering the multiple stationary target speeds and calculating an average speed based on the filtered multiple stationary target speeds; and a judgment module for judging whether a warning operation is required based on the wheel speeds, slip ratios, and the calculated average speed from the second detection information.

[0014] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising a processor and a memory, the memory storing at least one instruction or at least one program, the at least one instruction or the at least one program being loaded by the processor and executing the method described in one aspect above.

[0015] According to another aspect of the present invention, a computer storage medium is provided, wherein at least one instruction or at least one program is stored therein, wherein the at least one instruction or the at least one program is loaded by a processor and executes the method described in one aspect above. Attached Figure Description

[0016] Figure 1 This is a schematic flowchart of the indirect tire pressure detection method provided in this embodiment of the invention.

[0017] Figure 2 This is a schematic diagram of the process of filtering multiple stationary target speeds and calculating the average speed in the indirect tire pressure detection method provided in this embodiment of the invention.

[0018] Figure 3 This is a schematic diagram of the process for determining whether a warning operation is required in the indirect tire pressure monitoring method provided in this embodiment of the invention.

[0019] Figure 4 This is a structural block diagram of the indirect tire pressure monitoring device provided in an embodiment of the present invention.

[0020] Figure 5 This is a structural block diagram of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0022] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the said feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded.

[0023] The embodiments described herein can be described with reference to plan views and / or cross-sectional views using the ideal schematic diagrams of this disclosure. Therefore, the example illustrations can be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to those shown in the drawings, but include modifications to configurations formed based on manufacturing processes. Therefore, the areas illustrated in the drawings are schematic in nature, and the shapes of the areas shown in the figures illustrate specific shapes of areas of an element, but are not intended to be limiting.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined herein.

[0025] The present invention provides an indirect tire pressure detection method and device based on the same concept. Since the methods and devices solve problems in a similar way, the implementation of the devices and methods can refer to each other, and repeated parts will not be described again.

[0026] Figure 1 This is a flowchart illustrating the indirect tire pressure monitoring method provided in this embodiment of the invention. This specification provides the method operation steps as shown in the embodiments or flowcharts, but based on conventional or non-inventive labor, more or fewer operation steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many steps and does not represent the only possible execution order. In actual system or server product execution, the method can be executed in the order shown in the embodiments or drawings, or in parallel (e.g., in a parallel processor or multi-threaded processing environment).

[0027] like Figure 1 As shown, the indirect tire pressure detection method provided in this embodiment includes the following steps.

[0028] S101: Obtain the first detection information of the first sensor group.

[0029] The first detection information includes the velocities of multiple stationary targets. The first sensor group may include at least one of a millimeter-wave radar, a camera, and a lidar. The millimeter-wave radar, camera, and lidar provide point cloud target attributes of the road surface. The point cloud target attributes include the velocities of multiple stationary targets; in this embodiment, 40 stationary target velocities Vi are obtained, where i is an integer and 1 ≤ i ≤ 40. Of course, the invention is not limited to this; other numbers of stationary target velocities can also be obtained.

[0030] S102: Obtain the second detection information of the second sensor group.

[0031] The second detection information includes the wheel speed of each tire, the slip ratio of each tire, and a reference vehicle speed value. Specifically, the second detection information includes the left front wheel speed (Wheelspeed_FL), the right front wheel speed (Wheelspeed_FR), the left rear wheel speed (Wheelspeed_RL), the right rear wheel speed (Wheelspeed_RR), the reference vehicle speed value (Vehiclespeed_WSS) calculated by the wheel speed sensors, the left front wheel slip ratio (Split_FL), the right front wheel slip ratio (Split_FR), the left rear wheel slip ratio (Split_RL), and the right rear wheel slip ratio (Split_RR). This second sensor group includes wheel speed sensors.

[0032] S103: Filter the velocities of multiple stationary targets and calculate the average velocity based on the filtered velocities of the multiple stationary targets.

[0033] Figure 2 This is a schematic diagram illustrating the process of filtering multiple stationary target speeds and calculating the average speed in the indirect tire pressure detection method provided in this embodiment of the invention. Based on Figure 2 Step S103 will be explained below.

[0034] Specifically, step S103 has the following sub-steps:

[0035] S1031: Compare the speeds of multiple stationary targets in the first detection information with the reference vehicle speed value in the second detection information, and remove the stationary target speeds that deviate from the reference vehicle speed value by more than a preset deviation threshold, thereby obtaining multiple remaining stationary target speeds.

[0036] In other words, in this embodiment, the 40 stationary target speeds Vi obtained in step S101 are compared with the reference vehicle speed value Vehiclespeed_WSS obtained in step S102. It is determined whether the deviation between the stationary target speed Vi and the reference vehicle speed value Vehiclespeed_WSS is greater than a preset deviation value. If it is greater than the preset deviation value, the stationary target speed is removed. If it is less than or equal to the preset deviation value, it is retained as the remaining stationary target speed, thereby obtaining multiple remaining stationary target speeds.

[0037] Here, the preset deviation value can be set as a percentage. Generally, the preset deviation value is set to a value less than or equal to 10%.

[0038] S1032: Calculate the variance of the velocities of multiple remaining stationary targets.

[0039] For the velocities of the multiple remaining stationary targets retained in step S1031, calculate their variance σ.

[0040] S1033: Select the remaining stationary target velocities from multiple remaining stationary target velocities that fall within the positive and negative variance intervals, and use them as the selected stationary target velocities.

[0041] Here, the remaining stationary target velocities falling within the variance range of -σ to σ are further selected as the filtered stationary target velocities.

[0042] S1034: Calculate the average velocity of stationary targets after screening, and use it as the average velocity Va.

[0043] Therefore, the process in step S103 is complete.

[0044] S104: Based on the wheel speed, the slip ratio, and the calculated average speed obtained from the second detection information, determine whether a warning operation is required.

[0045] Figure 3 This is a flowchart illustrating the process of determining whether a warning operation is needed in the indirect tire pressure monitoring method provided in this embodiment of the invention. Based on Figure 3 Step S104 will be explained.

[0046] Specifically, step S104 has the following sub-steps:

[0047] S1041: Determine whether the slip ratio of each tire is less than the preset slip threshold.

[0048] That is, determine whether the slip ratios of the left front wheel (Split_FL), the right front wheel (Split_FR), the left rear wheel (Split_RL), and the right rear wheel (Split_RR) are less than a preset slip threshold. If they are less than the preset slip threshold, proceed to step S1042. If they are greater than or equal to the preset slip threshold, proceed to step S1043.

[0049] S1042: Determine whether the difference between the tire's wheel speed and the average speed Va is within the first range.

[0050] For example, if step S1041 determines that the left front wheel slip ratio Split_FL is less than a preset slip threshold, then in step S1042, it is determined whether the difference between the left front wheel speed Wheelspeed_FL and the average speed Va is within a first range. If the difference between the tire speed and the average speed Va is within the first range, the process proceeds to step S1045 and ends. If the difference between the tire speed and the average speed Va is not within the first range, the process proceeds to step S1044, i.e., a warning operation is performed. Here, the first range includes the endpoints of the range.

[0051] The difference here is calculated using the following formula:

[0052] (Wheel speed - average speed Va) / average speed Va. For example, the difference between the left front wheel speed Wheelspeed_FL and the average speed Va is (Wheelspeed_FL - Va) Va.

[0053] S1043: Determine whether the difference between the tire's wheel speed and the average speed Va is within the second range.

[0054] For example, if in step S1041 it is determined that the right front wheel slip ratio Split_FR is greater than or equal to a preset slip threshold, then in step S1043, it is determined whether the difference between the right front wheel speed Wheelspeed_FR and the average speed Va is within a second range. If the difference between the tire speed and the average speed Va is within the second range, the process proceeds to step S1046 and ends. If the difference between the tire speed and the average speed Va is not within the second range, the process proceeds to step S1044, i.e., a warning operation is performed.

[0055] Preferably, the first range is smaller than the second range and is contained within the second range. For example, the first range can be set to 0.9-1.1, and the second range can be set to 0.8-1.2. Of course, this is just an example, and the first and second ranges are not limited to this.

[0056] In addition, the warning operation in step S104 can be performed, for example, by emitting a warning sound through a buzzer or by using text reminders through various display devices (such as head-up displays, HUDs).

[0057] Figure 4 This is a structural block diagram of the indirect tire pressure monitoring device provided in an embodiment of the present invention.

[0058] like Figure 4 As shown, the indirect tire pressure monitoring device 200 includes: a first acquisition module 201, a second acquisition module 202, a calculation module 203, and a judgment module 204.

[0059] The system comprises the following modules: a first acquisition module 201 uses first detection information from a first sensor group, which includes the speeds of multiple stationary targets. A second acquisition module 202 acquires second detection information from a second sensor group, which includes the wheel speed of each tire, the slip ratio of each tire, and a reference vehicle speed. A calculation module 203 filters the multiple stationary target speeds and calculates an average speed based on the filtered speeds. A judgment module 204 determines whether a warning operation is required based on the wheel speed, slip ratio, and calculated average speed from the second detection information.

[0060] Figure 5 This is a structural block diagram of the electronic device provided in an embodiment of the present invention. Figure 5 As shown, the present invention also provides an electronic device 300, which includes a processor and a memory. The memory stores at least one instruction or at least one program, which is loaded by the processor and executes the methods described in the above embodiments.

[0061] The present invention also provides a computer storage medium storing at least one instruction or at least one program, wherein the at least one instruction or at least one program is loaded and executed by a processor to implement the methods described in the above embodiments.

[0062] Optionally, in this embodiment, the storage medium may be located at at least one of the multiple network servers in a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0063] Those skilled in the art will recognize that the modules, units, and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of electronic hardware and software, the components and steps of the examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can implement the described functions using different methods for each specific application, but such implementations should not be considered beyond the scope of the invention.

[0064] Although the present invention has been described with reference to specific embodiments, those skilled in the art should recognize that the scope of the invention is not limited to the specific combinations of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the present invention.

Claims

1. An indirect tire pressure detection method, characterized in that, Includes the following steps: Acquire first detection information from the first sensor group, the first detection information including the velocities of multiple stationary targets; Acquire second detection information from the second sensor group, the second detection information including wheel speed of each tire, slip ratio of each tire and reference vehicle speed value; The speeds of multiple stationary targets are filtered, and the average speed is calculated based on the filtered speeds of the multiple stationary targets. as well as Based on the wheel speed, slip ratio, and calculated average speed obtained from the second detection information, it is determined whether a warning operation is required. The process of determining whether a warning operation is needed based on the wheel speed, the slip ratio, and the calculated average speed obtained from the second detection information includes: Determine whether the slip ratio of each tire is less than the preset slip threshold; If the slip ratio of a tire is less than a preset slip threshold, then it is determined whether the difference between the tire's wheel speed and the average speed is within a first range; if the slip ratio of a tire is greater than or equal to the preset slip threshold, then it is determined whether the difference between the tire's wheel speed and the average speed is within a second range; and If the difference value is not within the first range or the difference value is not within the second range, a warning operation will be performed.

2. The indirect tire pressure detection method as described in claim 1, characterized in that, The velocities of multiple stationary targets are filtered, and the average velocity is calculated based on the filtered velocities of these stationary targets, including: The speeds of multiple stationary targets in the first detection information are compared with the reference vehicle speed value of the second detection information. The stationary target speeds that deviate from the reference vehicle speed value by more than a preset deviation threshold are removed, thereby obtaining multiple remaining stationary target speeds. Calculate the variance of the velocities of the remaining stationary targets; The remaining stationary target velocities that fall within both positive and negative variance intervals from among the multiple remaining stationary target velocities are selected as the filtered stationary target velocities; and Calculate the average speed of the stationary targets after screening, and use it as the average speed.

3. The indirect tire pressure detection method as described in claim 1, characterized in that, The difference value is calculated using the following formula: (Tire wheel speed - average speed) / average speed.

4. The indirect tire pressure detection method as described in claim 1, characterized in that, The first range is smaller than the second range and is contained within the second range.

5. The indirect tire pressure detection method as described in claim 1 or 2, characterized in that, The first sensor group includes at least one millimeter-wave radar, a camera, and a lidar.

6. The indirect tire pressure detection method as described in claim 1 or 2, characterized in that, The second sensor group includes a wheel speed sensor.

7. An indirect tire pressure monitoring device, characterized in that, include: The first acquisition module is used to acquire first detection information of the first sensor group, the first detection information including the velocities of multiple stationary targets; The second acquisition module is used to acquire the second detection information of the second sensor group, the second detection information including the wheel speed of each tire, the slip ratio of each tire and the reference vehicle speed value; The calculation module is used to filter the velocities of multiple stationary targets and calculate the average velocity based on the filtered velocities of the multiple stationary targets. as well as The judgment module is used to determine whether a warning operation is required based on the wheel speed, the slip ratio, and the calculated average speed obtained from the second detection information. The process of determining whether a warning operation is needed based on the wheel speed, the slip ratio, and the calculated average speed obtained from the second detection information includes: Determine whether the slip ratio of each tire is less than the preset slip threshold; If the slip ratio of a tire is less than a preset slip threshold, then it is determined whether the difference between the tire's wheel speed and the average speed is within a first range; if the slip ratio of a tire is greater than or equal to the preset slip threshold, then it is determined whether the difference between the tire's wheel speed and the average speed is within a second range; and If the difference value is not within the first range or the difference value is not within the second range, a warning operation will be performed.

8. An electronic device, characterized in that, The electronic device includes a processor and a memory, the memory storing at least one instruction or at least one program, the at least one instruction or the at least one program being loaded by the processor and executed as described in any one of claims 1 to 6.

9. A computer storage medium, characterized in that, The storage medium stores at least one instruction or at least one program, which is loaded by a processor and executed according to any one of claims 1 to 6.

Images