Tire pressure monitoring method and tire pressure monitoring system

Abstract

The present disclosure relates to a tire pressure monitoring method and system. The method comprises: a determination step, which involves determining whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system, performing a first monitoring step in the case of a direct tire pressure monitoring system and performing a second alarm monitoring step in the case of an indirect tire pressure monitoring system, a second alarm monitoring step is performed; the first alarm monitoring step, which involves, upon detecting a split road and a discrepancy in the wheel speeds of multiple wheels of the vehicle, lowering the pre-set tire pressure alarm threshold in the tire pressure monitoring system and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle is below the reduced tire pressure alarm threshold; the second alarm monitoring step, which involves, upon detecting a split road and a discrepancy in the wheel speeds of multiple wheels of the vehicle, disabling the tire pressure alarm function in the tire pressure monitoring system.

Description

[0001] Specification

[0002] Tire Pressure Monitoring Method and Tire Pressure Monitoring System

[0003] Technical Field

[0004] The present disclosure relates to the field of autonomous driving technology, and more particularly to a tire pressure monitoring method and a tire pressure monitoring system.

[0005] Background Art

[0006] A Tire Pressure Monitoring System (TPMS) is used for real-time monitoring of tire pressure, capable of alerting the driver to safety issues related to tire pressure. In the prior art, tire pressure monitoring systems generally achieve tire pressure monitoring by comparing wheel speed signals and tire pressure. When different wheel speeds or tire pressures are detected, the vehicle will issue a tire pressure alarm.

[0007] Summary of Invention

[0008] Based on the problems in the prior art mentioned above, the present disclosure aims to provide a tire pressure monitoring method and a tire pressure monitoring system that can achieve more accurate tire pressure alarms under split road conditions.

[0009] The tire pressure monitoring method according to one aspect of the present disclosure, which is applied to a tire pressure monitoring system, includes: a determination step, determining whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system; if it is determined that the tire pressure monitoring system is a direct tire pressure monitoring system, performing a first alarm monitoring step; if it is determined that the tire pressure monitoring system is an indirect tire pressure monitoring system, performing a second alarm monitoring step; the first alarm monitoring step, reducing the preset tire pressure alarm threshold in the tire pressure monitoring system when a split road is detected and the wheel speeds of multiple wheels of the vehicle are different, and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle is below the reduced tire pressure alarm threshold; the second alarm monitoring step, disabling the tire pressure alarm function of the tire pressure monitoring system when a split road is detected and the wheel speeds of multiple wheels of the vehicle are different.

[0010] The tire pressure monitoring method according to one aspect of the present disclosure, which is applied to a tire pressure monitoring system, includes: a camera module, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module, for obtaining the wheel speeds of multiple wheels of the vehicle; a determination module, for determining whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system; and an alarm monitoring module, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module and the wheel speeds of multiple wheels of the vehicle are confirmed to be the same: if the determination module determines that it is a direct tire pressure monitoring system, reducing the preset tire pressure alarm threshold in the tire pressure monitoring system and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle is below the reduced tire pressure alarm threshold when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different; or if the determination module determines that it is an indirect tire pressure monitoring system, disabling the tire pressure alarm function of the tire pressure monitoring system when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different.

[0011] The direct tire pressure monitoring method according to one aspect of the present disclosure, which is applied to a tire pressure monitoring system, includes: a camera module, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module, for obtaining the wheel speeds of multiple wheels of the vehicle; a tire pressure sensor, for obtaining the tire pressures of multiple wheels of the vehicle; and an alarm monitoring module, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are confirmed to be the same, reducing the preset tire pressure alarm threshold in the direct tire pressure monitoring system and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle obtained by tire pressure sensors is below the reduced tire pressure alarm threshold when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different.

[0012] The indirect tire pressure monitoring method according to one aspect of the present disclosure, which is applied to a tire pressure monitoring system, includes: a camera module, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module, for obtaining the wheel speeds of multiple wheels of the vehicle; and an alarm monitoring module, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are confirmed to be the same, disabling the tire pressure alarm function of the indirect tire pressure monitoring system when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different.

[0013] A computer-readable medium according to one aspect of the present disclosure, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the tire pressure monitoring method.

[0014] According to the tire pressure monitoring method and tire pressure monitoring system of the present disclosure, unnecessary tire pressure alarms can be avoided. Whether for direct tire pressure monitoring systems or indirect tire pressure monitoring systems, more accurate tire pressure alarms can be achieved. Description of Accompanying Drawings

[0015] The foregoing and other objectives and advantages of the present application will become more fully apparent from the following detailed description taken in conjunction with the accompanying drawings, in which identical or similar elements are denoted by the same reference numerals.

[0016] FIG. 1 is a schematic diagram of a tire pressure monitoring method according to an embodiment of the present disclosure.

[0017] FIG. 2 is a schematic diagram of a tire pressure monitoring system according to an embodiment of the present disclosure.

[0018] FIG. 3 is a schematic diagram of a direct tire pressure monitoring system according to an embodiment of the present disclosure.

[0019] FIG. 4 is a schematic diagram of a direct tire pressure monitoring system according to an embodiment of the present disclosure.

[0020] Specific embodiments

[0021] The following describes some of the examples of the present disclosure, aiming to provide a basic understanding of the present disclosure. It is not intended to identify key or decisive elements of the invention or to limit the scope of protection sought.

[0022] There are generally two types of tire pressure monitoring systems: Direct Tire Pressure Monitoring Systems (TPMS) and Indirect Tire Pressure Monitoring Systems (ITPMS). In a direct TPMS, tire pressure sensors are typically installed to monitor tire pressure. In contrast, an indirect TPMS generally does not use tire pressure sensors but instead monitors tire pressure by comparing the rotational speed differences between tires. Specifically, if the rotational speeds (e.g., speed, fluctuations, etc.) of the tires differ, it is determined that there is an abnormal tire pressure.

[0023] Furthermore, through the study of both direct and indirect TPMS and wheel speeds, the inventors of the present disclosure have found that there can be differences in wheel speeds on split roads. Specifically, a split road refers to a lane where the road surface is divided into two or more different surfaces. For example, half of the lane might be a normal road surface, while the other half is an abnormal road surface under construction. Due to the differing conditions between the normal and abnormal road surfaces, differences in wheel speeds among multiple wheels can occur. It is evident that in such split road conditions, the differences in wheel speeds are caused by the varying road conditions rather than by tire pressure. Therefore, this can lead to erroneous alarms in both direct and indirect TPMS.

[0024] Based on the above research, in the tire pressure monitoring method of one embodiment of the present disclosure, it is first determined whether the tire pressure monitoring system itself is a direct TPMS or an indirect TPMS. Different processing is then performed based on this determination. As a result, the tire pressure monitoring method of the present disclosure can be applied to both direct and indirect TPMS.

[0025] FIG. 1 is a schematic diagram of a tire pressure monitoring method according to an embodiment of the present disclosure.

[0026] As shown in FIG. 1 , a tire pressure monitoring method according to an embodiment of the present disclosure includes the following steps:

[0027] S1 : determining whether the tire pressure monitoring system itself is a direct tire pressure monitoring system. If the determination result is affirmative, proceed to S2; if the determination result is negative, skip to S11 . As an example of the determination method, it can be determined whether there is a tire pressure sensor. This is because, in a direct tire pressure monitoring system, tire pressure is monitored through tire pressure sensors, whereas in an indirect tire pressure monitoring system, tire pressure is monitored by comparing the rotational speed differences between tires using wheel speed sensors. Therefore, the presence or absence of tire pressure sensors can be used to make the determination.

[0028] S2: confirming that the road surface is normal, if the determination result is that the tire pressure monitoring system itself is a direct tire pressure monitoring system (indicated as “T” in FIG. 2). This includes confirming the normal road surface through road images obtained by a camera and confirming that the pressure values of multiple tires (four tires will be used as an example here) of the vehicle are at normal pressure levels through the tire pressure sensors.

[0029] S3: confirming that the wheel speeds are normal. Here, normal wheel speed means that the wheel speeds of multiple wheels of the vehicle are the same. Based on the normal wheel speeds, it can be confirmed that the tire pressure is normal. The wheel speed can be obtained through wheel speed sensors.

[0030] S4: based on the dual confirmation of S2 and S3, it is known that the road surface is normal and the tire pressure is normal.

[0031] S5: the camera detecting the presence of a split road, for example, confirming the split road through road images obtained by the camera.

[0032] S6: confirming that the wheel speeds are not the same. Here, “wheel speeds are not the same” means that the wheel speeds of multiple wheels of the vehicle are not the same. For example, in the case of four wheels, if half of the split road is normal and the other half is abnormal, the wheel speeds of the two left wheels and the two right wheels will not be the same.

[0033] S7: after the dual confirmation of S5 and S6, reducing the preset tire pressure alarm threshold in the direct tire pressure monitoring system. As an example, if the preset tire pressure alarm threshold is 1.8 bar, lower the tire pressure alarm threshold to 1.4 bar. In the present disclosure, the specific value of how much to lower the threshold is not specifically limited and can be set based on testing according to the actual conditions of the split road.

[0034] S8: determining whether the tire pressure from the tire pressure sensor is lower than the lowered tire pressure alarm threshold.

[0035] S9: issuing an alarm if the determination result is affirmative.

[0036] S10: not issuing an alarm if the determination result is negative.

[0037] S11 : The camera confirming that the road surface is normal if the determination result is that the system is an indirect tire pressure monitoring system.

[0038] S12: confirming that the wheel speeds are normal. Here, normal wheel speed means that the wheel speeds of multiple wheels of the vehicle are the same. This is because, in an indirect tire pressure monitoring system, the principle is to obtain wheel speed information through multiple wheel speed sensors, and tire pressure abnormalities can be determined through differences (e.g., speed, fluctuations) in wheel speeds. Therefore, if the wheel speeds are the same, it can be determined that the tire pressure is normal. S13: based on the dual confirmation of S11 and S12, confirming that the road surface is normal and the tire pressure is normal. S14: the camera detecting the presence of a split road. S15: confirming that the wheel speeds are not the same. Here, “wheel speeds are not the same” means that the wheel speeds of multiple wheels of the vehicle are not the same. This is because, in the case of a split road, the difference in wheel speeds is caused by the split road.

[0039] S16: disabling the tire pressure alarm function in the indirect tire pressure monitoring system.

[0040] The above describes a tire pressure monitoring method according to an embodiment of the present disclosure. Next, the tire pressure monitoring system will be described.

[0041] FIG. 2 is a schematic diagram of a tire pressure monitoring system according to an embodiment of the present disclosure.

[0042] The tire pressure monitoring system shown in FIG. 2 can be applied to both direct tire pressure monitoring systems and indirect tire pressure monitoring systems.

[0043] As shown in FIG. 2, a tire pressure monitoring system 100 according to an embodiment of the present disclosure includes: a camera module 110, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module 120, for obtaining the wheel speeds of multiple wheels of the vehicle; a determination module 130, for determining whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system; and an alarm monitoring module 140, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module 110 and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module 120 are confirmed to be the same: if the determination module 130 determines that it is a direct tire pressure monitoring system, reducing the preset tire pressure alarm threshold in the tire pressure monitoring system and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle is below the reduced tire pressure alarm threshold when the camera module 110 detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module 120 are different; or if the determination module 130 determines that it is an indirect tire pressure monitoring system, disabling the tire pressure alarm function of the tire pressure monitoring system when the camera module 110 detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module 120 are different.

[0044] Wherein, as an example, the determination module 130 can determine whether the system is a direct TPMS based on the presence of tire pressure sensors in the tire pressure monitoring system.

[0045] FIG. 3 is a schematic diagram of a direct tire pressure monitoring system according to an embodiment of the present disclosure.

[0046] As shown in FIG. 3, the direct tire pressure monitoring system 200 according to an embodiment of the present disclosure includes: a camera module 210, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module 220, for obtaining the wheel speeds of multiple wheels of the vehicle; a tire pressure sensor 230, for obtaining the tire pressures of multiple wheels of the vehicle; and an alarm monitoring module 240, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module 210 and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module 220 are confirmed to be the same, reducing the preset tire pressure alarm threshold in the direct tire pressure monitoring system and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle obtained by the tire pressure sensors 230 is below the reduced tire pressure alarm threshold when the camera module 210 detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module 220 are different.

[0047] FIG. 4 is a schematic diagram of an indirect tire pressure monitoring system according to an embodiment of the present disclosure.

[0048] As shown in FIG. 4, the indirect tire pressure monitoring system 300 according to an embodiment of the present disclosure includes: a camera module 310, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module 320, for obtaining the wheel speeds of multiple wheels of the vehicle; and an alarm monitoring module 330, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module 310 and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module 320 are confirmed to be the same, disabling the tire pressure alarm function of the indirect tire pressure monitoring system when the camera module 310 detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module 320 are different.

[0049] As described above, according to the tire pressure monitoring method and tire pressure monitoring system of the present disclosure, unnecessary tire pressure alarms can be avoided. Whether for direct tire pressure monitoring systems or indirect tire pressure monitoring systems, more accurate tire pressure alarms can be achieved.

[0050] The above is merely a specific embodiment of the present application, and the scope of protection of the present application is not limited thereto. Those skilled in the art may conceive other feasible variations or substitutions based on the technical scope disclosed in the present application, and such variations or substitutions are all encompassed within the scope of protection of the present application. Where there is no conflict, the embodiments of the present application and the features within the embodiments can also be combined with each other. The scope of protection of the present application is subject to the scope of protection of the Claims.

Claims

Claims1. A tire pressure monitoring method applied to a tire pressure monitoring system, characterized by comprising: a determination step, determining whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system; if it is determined that the tire pressure monitoring system is a direct tire pressure monitoring system, performing a first alarm monitoring step; if it is determined that the tire pressure monitoring system is an indirect tire pressure monitoring system, performing a second alarm monitoring step; the first alarm monitoring step, reducing the preset tire pressure alarm threshold in the tire pressure monitoring system when a split road is detected and the wheel speeds of multiple wheels of the vehicle are different, and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle is below the reduced tire pressure alarm threshold; the second alarm monitoring step, disabling the tire pressure alarm function of the tire pressure monitoring system when a split road is detected and the wheel speeds of multiple wheels of the vehicle are different.

2. The tire pressure monitoring method according to Claim 1 , characterized in that the first alarm monitoring step comprises the following sub-steps: confirming a normal road surface and normal tire pressure through a camera; reducing the preset tire pressure alarm threshold in the tire pressure monitoring system when a split road is detected and the wheel speeds of multiple wheels of the vehicle are different, wherein the wheel speeds are obtained through the vehicle’s wheel speed sensors; and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle is below the reduced tire pressure alarm threshold.

3. The tire pressure monitoring method according to Claim 2, characterized in that confirming normal tire pressure comprises: confirming that the pressure values of multiple tires of the vehicle are at normal pressure levels through a tire pressure sensor.

4. The tire pressure monitoring method according to Claim 1 , characterized in that the second alarm monitoring step comprises the following sub-steps: confirming a normal road surface and that the wheel speeds of multiple wheels of the vehicle are the same through a camera; and disabling the tire pressure alarm function of the tire pressure monitoring system when a split road is detected and the wheel speeds of multiple wheels of the vehicle are different, wherein the wheel speeds are obtained through the vehicle’s wheel speed sensors.

5. The tire pressure monitoring method according to Claim 1 , characterized in that: in the determination step, it is determined whether the tire pressure monitoring system is a direct tire pressure monitoring system based on whether there is a tire pressure sensor in the tire pressure monitoring system.

6. A tire pressure monitoring system, characterized by comprising: a camera module, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module, for obtaining the wheel speeds of multiple wheels of the vehicle; a determination module, for determining whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system; and an alarm monitoring module, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are confirmed to be the same: if the determination module determines that it is a direct tire pressure monitoring system, reducing the preset tire pressure alarm threshold in the tire pressure monitoring system and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle is below the reduced tire pressure alarm threshold when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different; or if the determination module determines that it is an indirect tire pressuremonitoring system, disabling the tire pressure alarm function of the tire pressure monitoring system when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different.

7. The tire pressure monitoring system according to Claim 6, characterized in that: the determination module determines whether the tire pressure monitoring system is a direct tire pressure monitoring system based on whether there is a tire pressure sensor in the tire pressure monitoring system.

8. A direct tire pressure monitoring system, characterized by comprising: a camera module, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module, for obtaining the wheel speeds of multiple wheels of the vehicle; a tire pressure sensor, for obtaining the tire pressures of multiple wheels of the vehicle; and an alarm monitoring module, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are confirmed to be the same, reducing the preset tire pressure alarm threshold in the direct tire pressure monitoring system and issuing a tire pressure alarm if the tire pressure of any one of the multiple wheels of the vehicle obtained by tire pressure sensors is below the reduced tire pressure alarm threshold when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different.

9. An indirect tire pressure monitoring system, characterized by comprising: a camera module, for obtaining road images and distinguishing whether the road is a split road or a normal road surface based on the road images; a wheel speed acquisition module, for obtaining the wheel speeds of multiple wheels of the vehicle; andan alarm monitoring module, under the premise that a normal road surface is confirmed based on the road images obtained by the camera module and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are confirmed to be the same, disabling the tire pressure alarm function of the indirect tire pressure monitoring system when the camera module detects a split road and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different.

10. A computer-readable medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the tire pressure monitoring method according to any one of Claims 1 to 5.

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