Tire pressure monitoring method and tire pressure monitoring system

Abstract

The invention relates to a tire pressure monitoring method and system. The method comprises the following steps: a judgment step: judging whether a tire pressure monitoring system is a direct type tire pressure monitoring system or an indirect type tire pressure monitoring system, carrying out a first alarm monitoring step under the condition of the direct type tire pressure monitoring system, and carrying out a second alarm monitoring step under the condition of the indirect type tire pressure monitoring system; a first alarm monitoring step: reducing a tire pressure alarm threshold value set in a tire pressure monitoring system under the condition that the separation road surface is monitored and the wheel speeds of a plurality of wheels of the vehicle are different, and performing first alarm monitoring on the tire pressure alarm threshold value; under the condition that the tire pressure of any one of the multiple wheels of the vehicle is lower than the reduced tire pressure warning threshold value, a tire pressure warning is given out; and a second alarm monitoring step of forbidding the tire pressure alarm function in the tire pressure monitoring system under the condition that the separation road surface is monitored and the wheel speeds of the plurality of wheels of the vehicle are different.

Description

Technical Field

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

[0002] The tire pressure monitoring system (TPMS) is used to monitor tires in real time and can remind the driver to pay attention to safety issues related to tire pressure. The tire pressure monitoring system in the prior art generally monitors tire pressure by comparing wheel speed signals, tire pressure, etc., and when different wheel speeds or tire pressures are detected, the vehicle will issue a tire pressure warning. Summary of the invention

[0003] Based on the above problems in the prior art, the present invention aims to provide a tire pressure monitoring method and a tire pressure monitoring system which can realize more accurate tire pressure warning in the case of separated roads.

[0004] A tire pressure monitoring method according to one aspect of the present invention is applied to a tire pressure monitoring system, comprising:

[0005] A judging step, judging whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system, and performing a first warning monitoring step if the tire pressure monitoring system is judged to be a direct tire pressure monitoring system, and performing a second warning monitoring step if the tire pressure monitoring system is judged to be an indirect tire pressure monitoring system;

[0006] A first warning monitoring step, when a separated road surface is detected and the wheel speeds of the multiple wheels of the vehicle are different, lowering the tire pressure warning threshold already set in the tire pressure monitoring system, and when the tire pressure of any one of the multiple wheels of the vehicle is lower than the lowered tire pressure warning threshold, issuing a tire pressure warning;

[0007] The second warning monitoring step is to disable the tire pressure warning function in the tire pressure monitoring system when it is detected that a separated road surface occurs and the wheel speeds of the plurality of wheels of the vehicle are different.

[0008] A tire pressure monitoring system according to one aspect of the present invention comprises:

[0009] A camera module, used for acquiring a road image and distinguishing whether the road is a separated road or a normal road according to the road image;

[0010] A wheel speed acquisition module, used to acquire the wheel speeds of multiple wheels of the vehicle;

[0011] a determination module, configured to determine whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system; and

[0012] The alarm monitoring module, under the premise that it is confirmed that the road image obtained by the camera module is a normal road surface and the wheel speeds of multiple wheels of the vehicle are the same: when the judgment module determines that it is a direct tire pressure monitoring system, it is used to reduce the tire pressure alarm threshold already set in the tire pressure monitoring system and issue a tire pressure alarm when the tire pressure of any one of the multiple wheels of the vehicle is lower than the lowered tire pressure alarm threshold when the camera module detects the presence of a separated road surface and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different; or, when the judgment module determines that it is an indirect tire pressure monitoring system, it is used to disable the tire pressure alarm function in the tire pressure monitoring system when the camera module detects the presence of a separated road surface and the wheel speeds of multiple wheels of the vehicle obtained by the wheel speed acquisition module are different.

[0013] A direct tire pressure monitoring system according to one aspect of the present invention comprises:

[0014] A camera module, used for acquiring a road image and distinguishing whether the road is a separated road or a normal road according to the road image;

[0015] A wheel speed acquisition module, used to acquire the wheel speeds of multiple wheels of the vehicle;

[0016] A tire pressure sensor for obtaining tire pressure of a plurality of wheels of a vehicle; and

[0017] The alarm monitoring module, under the premise that the road image obtained by the camera module is confirmed to be a normal road surface and the wheel speeds of the multiple wheels obtained by the wheel speed obtaining module are the same, reduces the tire pressure alarm threshold already set in the direct tire pressure monitoring system when the camera module monitors the presence of a separated road surface and the wheel speeds of the multiple wheels obtained by the wheel speed obtaining module are different, and issues a tire pressure alarm when the tire pressure of any one of the multiple wheels obtained by the tire pressure sensor is lower than the reduced tire pressure alarm threshold.

[0018] An indirect tire pressure monitoring system according to one aspect of the present invention comprises:

[0019] A camera module, used for acquiring a road image and distinguishing whether the road is a separated road or a normal road according to the road image;

[0020] A wheel speed acquisition module, used to acquire the wheel speeds of multiple wheels of the vehicle; and

[0021] The alarm monitoring module disables the tire pressure alarm function in the indirect tire pressure monitoring system when the camera module detects the presence of a separated road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed obtaining module are different, on the premise that the road image obtained by the camera module is confirmed to be a normal road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed obtaining module are the same.

[0022] A computer readable medium according to one aspect of the present invention stores a computer program, which implements the tire pressure monitoring method when executed by a processor.

[0023] The tire pressure monitoring method and tire pressure monitoring system according to the present invention can avoid unnecessary tire pressure warnings, and can achieve more accurate tire pressure warnings for both direct tire pressure monitoring systems and indirect tire pressure monitoring systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects and advantages of the present application will become more fully apparent from the following detailed description in conjunction with the accompanying drawings, in which the same or similar elements are represented by the same reference numerals.

[0025] Figure 1 Schematic diagram of a tire pressure monitoring method according to an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of a tire pressure monitoring system according to an embodiment of the present invention.

[0027] Figure 3 Schematic diagram of a direct tire pressure monitoring system according to an embodiment of the present invention.

[0028] Figure 4 Schematic diagram of a direct tire pressure monitoring system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Some of the various embodiments of the present invention are described below, which are intended to provide a basic understanding of the present invention, but are not intended to identify the key or decisive elements of the present invention or to limit the scope of protection.

[0030] There are generally two types of tire pressure monitoring systems: direct tire pressure monitoring systems and indirect tire pressure monitoring systems. In direct tire pressure monitoring systems, tire pressure sensors are generally installed to monitor tire pressure. In indirect tire pressure monitoring systems, tire pressure is generally monitored by comparing the speed differences between tires. That is, if the wheel speeds (such as speed, fluctuations, etc.) between tires are different, it will be judged that the tire pressure is abnormal.

[0031] Furthermore, through research on direct tire pressure monitoring systems and indirect tire pressure monitoring systems and wheel speeds, the inventors of the present invention discovered that in the case of a split road, there will be wheel speed differences. Specifically, the so-called split road means that the road surface of the lane is divided into two or more different road surfaces. As an example, for example, half of the lane is a normal road surface, and the other half is an abnormal road surface that is under construction. Since the road conditions of the normal road surface and the abnormal road surface are different, there will be wheel speed differences between multiple wheels. It can be seen that in the case of such a split road, the wheel speed difference is caused by the difference in road conditions of the lane rather than the tire pressure. Therefore, this will cause false alarms in the direct tire pressure monitoring system or the indirect tire pressure monitoring system.

[0032] Based on the above research, in a tire pressure monitoring method of one embodiment of the present invention, it is first determined whether the tire pressure monitoring system itself is a direct tire pressure monitoring system or an indirect tire pressure monitoring system, and then different processing is performed on this basis, thereby making the tire pressure monitoring method of the present invention applicable to both direct tire pressure monitoring systems and indirect tire pressure monitoring systems.

[0033] Figure 1 Schematic diagram of a tire pressure monitoring method according to an embodiment of the present invention.

[0034] like Figure 1 As shown, a tire pressure monitoring method according to an embodiment of the present invention comprises the following steps:

[0035] S1: Determine whether the tire pressure monitoring system itself is a direct tire pressure monitoring system. If the determination result is yes, proceed to S2. If the determination result is no, proceed to S11. As an example of a determination method, for example, whether it is a direct tire pressure monitoring system can be determined by determining whether there is a tire pressure sensor. This is because in a direct tire pressure monitoring system, tire pressure is monitored by a tire pressure sensor, while in an indirect tire pressure monitoring system, a wheel speed sensor is used to compare the speed difference between tires to monitor tire pressure. Therefore, the determination can be made by determining whether there is a tire pressure sensor.

[0036] S2: If the tire pressure monitoring system is a direct tire pressure monitoring system ( Figure 2 In the case of a vehicle with a vehicle on the road surface (hereinafter referred to as “T”), the vehicle is on a normal road surface by confirming that the road surface is normal, including confirming that the road surface is normal through a road surface image obtained by a camera and confirming that the pressure values ​​of multiple tires of the vehicle (hereinafter referred to as four tires as an example) are at normal pressure levels through tire pressure sensors;

[0037] S3: confirming that the wheel speed is normal. Here, the normal wheel speed means that the wheel speeds of multiple wheels of the vehicle are the same. According to the normal wheel speed, it can be confirmed that the tire pressure is normal. The wheel speed can be obtained by a wheel speed sensor;

[0038] S4: According to the double confirmation of S2 and S3, it is known that the road is normal and the tire pressure is normal;

[0039] S5: The camera detects that a split road surface has appeared, for example, the split road surface is confirmed by obtaining a road surface image from the camera;

[0040] S6: confirming that the wheel speeds are different. Here, “wheel speeds are different” means that the wheel speeds of multiple wheels of the vehicle are different. For example, in the case of four wheels, assuming that half of the split road surface is a normal road surface and the other half is an abnormal road surface, then the wheel speeds of the two left wheels and the wheel speeds of the two right wheels are different;

[0041] S7: after the double confirmation of S5 and S6, the tire pressure warning threshold set in the direct tire pressure monitoring system is reduced. As an example, assuming that the set tire pressure warning threshold is 1.8 bar, the tire pressure warning threshold is reduced to 1.4 bar. In the present invention, there is no specific limitation on the specific value of the reduction, and it can be set according to the actual situation of the separated road surface.

[0042] S8: determining whether the tire pressure from the tire pressure sensor is lower than the reduced tire pressure warning threshold;

[0043] S9: If the judgment result is yes, an alarm is issued;

[0044] S10: If the judgment result is no, no alarm is issued.

[0045] S11: If the result of the determination is that the indirect tire pressure monitoring system is used, the camera confirms that the road surface is normal;

[0046] S12: confirming that the wheel speed is normal. Here, normal wheel speed means that the wheel speeds of multiple wheels of the vehicle are the same. This is because in the indirect tire pressure monitoring system, the principle is to obtain wheel speed information through wheel speed sensors of multiple wheels, and the tire pressure abnormality can be determined by the difference between the wheel speeds (such as speed, fluctuation, etc.). Therefore, if the wheel speeds are the same, it can be determined that the tire pressure is normal;

[0047] S13: According to the double confirmation of S11 and S12, it is confirmed that the road surface is normal and the tire pressure is normal;

[0048] S14: the camera detects the presence of a split road surface; S15: confirming that the wheel speeds are different, wherein the different wheel speeds here refer to different wheel speeds of multiple wheels of the vehicle, because, in the case of a split road surface, the different wheel speeds are caused by the split road surface;

[0049] S16: Disabling the tire pressure warning function in the indirect tire pressure monitoring system.

[0050] The tire pressure monitoring method according to one embodiment of the present invention has been described above, and the tire pressure monitoring system will be described next.

[0051] Figure 2 Schematic diagram of a tire pressure monitoring system according to an embodiment of the present invention.

[0052] Figure 2 The tire pressure monitoring system shown can be applicable to a direct tire pressure monitoring system and an indirect tire pressure monitoring system.

[0053] like Figure 2 As shown, a tire pressure monitoring system 100 according to an embodiment of the present invention includes:

[0054] The camera module 110 is used to obtain a road image and distinguish whether the road is a separated road or a normal road according to the road image;

[0055] The wheel speed acquisition module 120 is used to acquire the wheel speeds of multiple wheels of the vehicle;

[0056] A determination module 130, configured to determine whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system;

[0057] The alarm monitoring module 140, under the premise that the road image obtained by the camera module 110 is confirmed to be a normal road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module 120 are the same: when the judgment module 130 determines that it is a direct tire pressure monitoring system, it is used to reduce the tire pressure alarm threshold already set in the tire pressure monitoring system and issue a tire pressure alarm when the tire pressure of any one of the multiple wheels of the vehicle is lower than the lowered tire pressure alarm threshold when the camera module 110 detects that the road surface is separated and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module 120 are different; or, when the judgment module 130 determines that it is an indirect tire pressure monitoring system, it is used to disable the tire pressure alarm function in the tire pressure monitoring system when the camera module 110 detects that the road surface is separated and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module 120 are different.

[0058] As an example, the determination module 130 may determine 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.

[0059] Figure 3 Schematic diagram of a direct tire pressure monitoring system according to an embodiment of the present invention.

[0060] like Figure 3 As shown, a direct tire pressure monitoring system 200 according to an embodiment of the present invention includes:

[0061] The camera module 210 is used to obtain a road image and distinguish whether the road is a separated road or a normal road according to the road image;

[0062] The wheel speed acquisition module 220 is used to acquire the wheel speeds of multiple wheels of the vehicle;

[0063] A tire pressure sensor 230 for acquiring tire pressures of a plurality of wheels of the vehicle; and

[0064] The alarm monitoring module 240, on the premise that the road image obtained by the camera module 210 is confirmed to be a normal road surface and the wheel speeds of the multiple wheels obtained by the wheel speed obtaining module 220 are the same, reduces the tire pressure alarm threshold already set in the direct tire pressure monitoring system when the camera module 210 detects the presence of a separated road surface and the wheel speeds of the multiple wheels obtained by the wheel speed obtaining module 220 are different, and issues a tire pressure alarm when the tire pressure of any one of the multiple wheels obtained by the tire pressure sensor 230 is lower than the lowered tire pressure alarm threshold.

[0065] Figure 4Schematic diagram of an indirect tire pressure monitoring system according to an embodiment of the present invention.

[0066] like Figure 4 As shown, an indirect tire pressure monitoring system 300 according to an embodiment of the present invention includes:

[0067] The camera module 310 is used to obtain a road image and distinguish whether the road is a separated road or a normal road according to the road image;

[0068] The wheel speed acquisition module 320 is used to acquire the wheel speeds of multiple wheels of the vehicle; and

[0069] The alarm monitoring module 330, under the premise that the road image obtained by the camera module 310 is confirmed to be a normal road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module 320 are the same, when the camera module 310 detects the presence of a separated road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module 320 are different, disables the tire pressure alarm function in the indirect tire pressure monitoring system.

[0070] As described above, the tire pressure monitoring method and tire pressure monitoring system according to the present invention can avoid unnecessary tire pressure warnings, and can achieve more accurate tire pressure warnings for both direct tire pressure monitoring systems and indirect tire pressure monitoring systems.

[0071] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art can think of other feasible changes or substitutions based on the technical scope disclosed in the present application, and such changes or substitutions are all included in the protection scope of the present application. In the absence of conflict, the implementation modes of the present application and the features in the implementation modes can also be combined with each other. The protection scope of the present application shall be subject to the description of the claims.

Claims

1. A tire pressure monitoring method, the method being applied to a tire pressure monitoring system, characterized in that: include: A judging step, judging whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system, and performing a first warning monitoring step if the tire pressure monitoring system is judged to be a direct tire pressure monitoring system, and performing a second warning monitoring step if the tire pressure monitoring system is judged to be an indirect tire pressure monitoring system; A first warning monitoring step, when a separated road surface is detected and the wheel speeds of the multiple wheels of the vehicle are different, lowering the tire pressure warning threshold already set in the tire pressure monitoring system, and when the tire pressure of any one of the multiple wheels of the vehicle is lower than the lowered tire pressure warning threshold, issuing a tire pressure warning; The second warning monitoring step is to disable the tire pressure warning function in the tire pressure monitoring system when it is detected that a separated road surface occurs and the wheel speeds of the plurality of wheels of the vehicle are different.

2. The tire pressure monitoring method according to claim 1, characterized in that: The first alarm monitoring step includes the following sub-steps: Use the camera to confirm that the road is normal and the tire pressure is normal; When the camera detects the presence of a separated road surface and confirms that the wheel speeds of multiple wheels of the vehicle are different, lowering the tire pressure warning threshold already set in the tire pressure monitoring system, wherein the wheel speed is obtained by a wheel speed sensor of the vehicle; and When the tire pressure of any one of the plurality of wheels of the vehicle is lower than the reduced tire pressure warning threshold, a tire pressure warning is issued.

3. The tire pressure monitoring method according to claim 2, characterized in that: The confirming that the tire pressure is normal includes: confirming, through a tire pressure sensor, that the pressure values ​​of multiple tires of the vehicle are at a normal pressure level.

4. The tire pressure monitoring method according to claim 1, characterized in that: The second alarm monitoring step includes the following sub-steps: Confirming through the camera that the road is normal and that the wheel speeds of the vehicle's multiple wheels are the same; and When the camera detects the presence of a separated road surface and confirms that the wheel speeds of the multiple wheels of the vehicle are different, the tire pressure warning function in the tire pressure monitoring system is disabled, The wheel speed is obtained by a wheel speed sensor of the vehicle.

5. The tire pressure monitoring method according to claim 1, characterized in that: In the determining step, whether the tire pressure monitoring system is a direct tire pressure monitoring system is determined based on whether a tire pressure sensor exists in the tire pressure monitoring system.

6. A tire pressure monitoring system, characterized in that: include: A camera module, used for acquiring a road image and distinguishing whether the road is a separated road or a normal road according to the road image; A wheel speed acquisition module, used to acquire the wheel speeds of multiple wheels of the vehicle; A determination module, used for determining whether the tire pressure monitoring system is a direct tire pressure monitoring system or an indirect tire pressure monitoring system; as well as An alarm monitoring module, under the premise that the road image obtained by the camera module is confirmed to be a normal road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module are the same: when the judgment module determines that it is a direct tire pressure monitoring system, when the camera module detects the presence of a separated road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module are different, the tire pressure alarm threshold already set in the tire pressure monitoring system is lowered and a tire pressure alarm is issued when the tire pressure of any one of the multiple wheels of the vehicle is lower than the lowered tire pressure alarm threshold; or, when the judgment module determines that it is an indirect tire pressure monitoring system, when the camera module detects the presence of a separated road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed acquisition module are different, the tire pressure alarm function in the tire pressure monitoring system is disabled.

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 a tire pressure sensor exists in the tire pressure monitoring system.

8. A direct tire pressure monitoring system, characterized in that: include: A camera module, used for acquiring a road image and distinguishing whether the road is a separated road or a normal road according to the road image; A wheel speed acquisition module, used to acquire the wheel speeds of multiple wheels of the vehicle; A tire pressure sensor, used to obtain tire pressures of multiple wheels of a vehicle; as well as The alarm monitoring module, under the premise that the road image obtained by the camera module is confirmed to be a normal road surface and the wheel speeds of the multiple wheels obtained by the wheel speed obtaining module are the same, reduces the tire pressure alarm threshold set in the direct tire pressure monitoring system when the camera module monitors the presence of a separated road surface and the wheel speeds of the multiple wheels obtained by the wheel speed obtaining module are different, and issues a tire pressure alarm when the tire pressure of any one of the multiple wheels obtained by the tire pressure sensor is lower than the reduced tire pressure alarm threshold.

9. An indirect tire pressure monitoring system, characterized in that: include: A camera module, used for acquiring a road image and distinguishing whether the road is a separated road or a normal road according to the road image; A wheel speed acquisition module, used to acquire the wheel speeds of multiple wheels of the vehicle; as well as The alarm monitoring module disables the tire pressure alarm function in the indirect tire pressure monitoring system when the camera module detects the presence of a separated road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed obtaining module are different, on the premise that the road image obtained by the camera module is confirmed to be a normal road surface and the wheel speeds of the multiple wheels of the vehicle obtained by the wheel speed obtaining module are the same.

10. A computer readable medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the tire pressure monitoring method according to any one of claims 1 to 5 is implemented.

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