Tire tread abnormality detection method, device, vehicle and storage medium

Abstract

The present application relates to a tire tread abnormality detection method, device, vehicle and storage medium, including: generating the real-time position and rotation cycle of each tire based on the collected gear ring signal of at least one tire; when the current vehicle is identified to have an abnormal tire based on the collected sound signal of at least one tire, determining the sector position of at least one abnormal tire based on the sound wave cycle obtained from the sound signal and the real-time position of the corresponding tire; when the current vehicle is in a curve, determining at least one final abnormal tire and the abnormal position of each final abnormal tire based on the sector position of at least one target wheel and at least one abnormal tire determined by the sound wave cycle and the rotation cycle of at least one tire. Thus, by identifying the abnormal position of the tire through sound, maintenance personnel are assisted in accurately eliminating the abnormality, solving the problem of users needing to use other tools to find the location of foreign objects, or being unable to detect non-metallic objects and being too costly, thereby improving vehicle safety.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a tire tread abnormality detection method, device, vehicle, and storage medium. Background Art

[0002] When a vehicle is driving, the tire will inevitably run over foreign objects, causing the foreign objects to adhere to the tread, get stuck in the tread, or even pierce the tire. Therefore, it is very important to detect and remove foreign objects as early as possible.

[0003] In the related art, there are generally the following ways to detect foreign objects: (1) alerting the user through tire pressure monitoring feedback after a tire leaks; (2) the user subjectively feels that the vehicle is running off the road during driving; (3) by installing a metal detection device on each tire and combining it with the on-board computer to identify foreign objects.

[0004] However, methods (1) and (2) still require users to use other tools to find the location of foreign objects. Although method (3) can detect foreign objects, it cannot detect non-metallic objects and is costly, which needs to be solved urgently. Summary of the Invention

[0005] The present application provides a tire tread abnormality detection method, device, vehicle and storage medium to solve the problems in related technologies that require users to use other tools to find the location of foreign objects, or are unable to detect non-metallic objects and are costly. The abnormal location of the tire can be identified by sound, thereby assisting the driver or maintenance personnel to accurately eliminate the abnormality at a low cost, greatly improving the safety of the vehicle.

[0006] To achieve the above objectives, a first embodiment of the present application provides a method for detecting tire tread abnormalities, comprising the following steps:

[0007] collecting a ring gear signal of at least one tire, and generating a real-time position of the at least one tire and a rotation period of the at least one tire according to the ring gear signal of the at least one tire;

[0008] collecting a sound signal of at least one tire, and if at least one abnormal tire is identified on the current vehicle based on the sound signal of the at least one tire, determining a sector position of the at least one abnormal tire based on a sound wave period obtained from the sound signal and a real-time position of the at least one tire; and

[0009] When it is identified that the current vehicle is in a curve, at least one target wheel is determined based on the sound wave period and the rotation period of the at least one tire, and at least one final abnormal tire and the abnormal position of each final abnormal tire are determined based on the at least one target wheel and the sector position of the at least one abnormal tire.

[0010] According to one embodiment of the present application, after determining the at least one final abnormal tire and the abnormal position of each final abnormal tire according to the sector position of the at least one target wheel and the at least one abnormal tire, the method further includes:

[0011] controlling the vehicle to display the at least one final abnormal tire and the abnormal position of each final abnormal tire;

[0012] And / or, sending the at least one final abnormal tire and the abnormal location of each final abnormal tire to a preset mobile terminal.

[0013] According to one embodiment of the present application, generating the real-time position of the at least one tire and the rotation period of the at least one tire according to the ring gear signal of the at least one tire includes:

[0014] decoding the ring gear signal of the at least one tire to obtain a decoded ring gear signal of the at least one tire;

[0015] Based on the correspondence between the sectors and the ring gear, the real-time position of the at least one tire and the rotation period of the at least one tire are calculated according to the decoded ring gear signal of the at least one tire.

[0016] According to one embodiment of the present application, before calculating the real-time position of the at least one tire and the rotation period of the at least one tire according to the decoded ring gear signal of the at least one tire based on the correspondence between the sectors and the ring gear, the method further includes:

[0017] Acquire a signal tooth position of the at least one tire and a sector division of the at least one tire;

[0018] The signal tooth position of the at least one tire and the sector division of the at least one tire are calibrated to obtain a corresponding relationship between the sector and the ring gear.

[0019] According to one embodiment of the present application, identifying that the current vehicle has at least one abnormal tire based on the sound signal of the at least one tire includes:

[0020] decoding the sound signal of the at least one tire to obtain a digitized square wave signal of the at least one tire;

[0021] determining whether there is a digitized square wave signal satisfying a preset abnormal condition among the digitized square wave signals of the at least one tire;

[0022] If the digitized square wave signal of the at least one tire includes the digitized square wave signal that meets the preset abnormal condition, it is determined that the current vehicle has the at least one abnormal tire.

[0023] According to one embodiment of the present application, determining the sector position of the at least one abnormal tire based on the sound wave period obtained from the sound signal and the real-time position of the at least one tire includes:

[0024] Generating the sound wave cycle according to the digitized square wave signal that meets the preset abnormal condition;

[0025] The sound wave cycle and the time axis of the sound signal of the at least one tire are aligned, and the sector position of the at least one abnormal tire is obtained according to the real-time position of the at least one tire corresponding to the maximum volume point in the sound wave cycle.

[0026] According to one embodiment of the present application, when the current vehicle is identified as being in a curve, determining at least one target wheel based on the sound wave period and the rotation period of the at least one tire includes:

[0027] Obtaining a curve rotation period of at least one tire when the current vehicle is in a curve;

[0028] The at least one target wheel is determined based on the at least one wheel having the same cornering rotation period and sound wave period as the at least one tire.

[0029] According to the tire tread abnormality detection method proposed in the embodiment of the present application, the real-time position and rotation cycle of each tire are generated based on the collected gear ring signal of at least one tire. When the current vehicle is identified to have an abnormal tire based on the sound signal collected from at least one tire, the sector position of at least one abnormal tire is determined based on the sound wave cycle obtained from the sound signal and the real-time position of the corresponding tire. When the current vehicle is in a curve, at least one final abnormal tire and the abnormal position of each final abnormal tire are determined based on the sector position of at least one target wheel and at least one abnormal tire determined by the sound wave cycle and the rotation cycle of at least one tire. Thus, the abnormal position of the tire is identified by sound, which assists maintenance personnel in accurately eliminating the abnormality, solving the problem of requiring users to use other tools to find the location of foreign objects, or the inability to detect non-metallic objects and the high cost. While reducing costs, it greatly improves vehicle safety.

[0030] To achieve the above-mentioned objectives, a second embodiment of the present application provides a tire tread abnormality detection device, comprising: a generation module, configured to collect a ring gear signal of at least one tire, and generate a real-time position of the at least one tire and a rotation period of the at least one tire based on the ring gear signal of the at least one tire;

[0031] a processing module configured to collect a sound signal from at least one tire, and if at least one abnormal tire is identified on the current vehicle based on the sound signal from the at least one tire, determine a sector position of the at least one abnormal tire based on a sound wave period obtained from the sound signal and a real-time position of the at least one tire; and

[0032] a determination module for, upon recognizing that the current vehicle is in a curve, determining at least one target wheel based on the sound wave period and the rotation period of the at least one tire, and determining at least one final abnormal tire and an abnormal position of each final abnormal tire based on the at least one target wheel and the sector position of the at least one abnormal tire.

[0033] According to one embodiment of the present application, after determining the at least one final abnormal tire and the abnormal position of each final abnormal tire based on the sector position of the at least one target wheel and the at least one abnormal tire, the determining module is further configured to:

[0034] controlling the vehicle to display the at least one final abnormal tire and the abnormal position of each final abnormal tire;

[0035] And / or, sending the at least one final abnormal tire and the abnormal location of each final abnormal tire to a preset mobile terminal.

[0036] According to one embodiment of the present application, the generating module is specifically configured to:

[0037] decoding the ring gear signal of the at least one tire to obtain a decoded ring gear signal of the at least one tire;

[0038] Based on the correspondence between the sectors and the ring gear, the real-time position of the at least one tire and the rotation period of the at least one tire are calculated according to the decoded ring gear signal of the at least one tire.

[0039] According to one embodiment of the present application, before calculating the real-time position of the at least one tire and the rotation period of the at least one tire according to the decoded ring gear signal of the at least one tire based on the correspondence between the sectors and the ring gear, the generation module is further configured to:

[0040] Acquire a signal tooth position of the at least one tire and a sector division of the at least one tire;

[0041] The signal tooth position of the at least one tire and the sector division of the at least one tire are calibrated to obtain a corresponding relationship between the sector and the ring gear.

[0042] According to one embodiment of the present application, the processing module is specifically configured to:

[0043] decoding the sound signal of the at least one tire to obtain a digitized square wave signal of the at least one tire;

[0044] determining whether there is a digitized square wave signal satisfying a preset abnormal condition among the digitized square wave signals of the at least one tire;

[0045] If the digitized square wave signal of the at least one tire includes the digitized square wave signal that meets the preset abnormal condition, it is determined that the current vehicle has the at least one abnormal tire.

[0046] According to one embodiment of the present application, the processing module is specifically configured to:

[0047] Generating the sound wave cycle according to the digitized square wave signal that meets the preset abnormal condition;

[0048] The sound wave cycle and the time axis of the sound signal of the at least one tire are aligned, and the sector position of the at least one abnormal tire is obtained according to the real-time position of the at least one tire corresponding to the maximum volume point in the sound wave cycle.

[0049] According to one embodiment of the present application, the determining module is specifically configured to:

[0050] Obtaining a curve rotation period of at least one tire when the current vehicle is in a curve;

[0051] The at least one target wheel is determined based on the at least one wheel having the same cornering rotation period and sound wave period as the at least one tire.

[0052] According to the tire tread abnormality detection device proposed in the embodiment of the present application, the real-time position and rotation cycle of each tire are generated based on the collected gear ring signal of at least one tire. When the current vehicle is identified to have an abnormal tire based on the sound signal collected from at least one tire, the sector position of at least one abnormal tire is determined based on the sound wave cycle obtained from the sound signal and the real-time position of the corresponding tire. When the current vehicle is in a curve, at least one final abnormal tire and the abnormal position of each final abnormal tire are determined based on the sector position of at least one target wheel and at least one abnormal tire determined by the sound wave cycle and the rotation cycle of at least one tire. Thus, the abnormal position of the tire is identified by sound, which assists maintenance personnel in accurately eliminating the abnormality, solving the problem of requiring users to use other tools to find the location of foreign objects, or the problem of being unable to detect non-metallic objects and high costs. While reducing costs, it greatly improves vehicle safety.

[0053] To achieve the above-mentioned objectives, the third aspect of the present application proposes a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the tire tread abnormality detection method as described in the above-mentioned embodiment.

[0054] To achieve the above-mentioned objectives, the fourth embodiment of the present application proposes a computer storage medium on which a computer program is stored. The program is executed by a processor to implement the tire tread abnormality detection method as described in the above-mentioned embodiment.

[0055] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0057] Figure 1 This is a flow chart of a tire tread abnormality detection method provided according to an embodiment of the present application;

[0058] Figure 2 1 is a schematic structural diagram of a tire tread abnormality detection system according to an embodiment of the present application;

[0059] Figure 3 is a schematic diagram of a signal ring gear according to an embodiment of the present application;

[0060] Figure 4 Schematic diagram of the correspondence between multi-cycle tire sectors and gear rings according to one embodiment of the present application;

[0061] Figure 5 Schematic diagram of tire sector division according to one embodiment of the present application;

[0062] Figure 6 Schematic diagram of the correspondence between tire sectors and gear rings according to one embodiment of the present application;

[0063] Figure 7 A schematic diagram illustrating a correspondence between a sound wave cycle and a time axis of a corresponding relationship between at least one tire sector and a ring gear according to an embodiment of the present application;

[0064] Figure 8 is a schematic diagram comparing a sound wave period with a cornering rotation period of at least one tire according to one embodiment of the present application;

[0065] Figure 9is a flowchart of a method for detecting tire tread abnormality according to one embodiment of the present application;

[0066] Figure 10 1 is a block diagram of a tire tread abnormality detection device according to one embodiment of the present application;

[0067] Figure 11 Schematic diagram of the structure of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0068] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0069] The following describes the tire tread abnormality detection method, device, vehicle and storage medium proposed in accordance with the embodiments of the present application with reference to the accompanying drawings. First, the tire tread abnormality detection method proposed in accordance with the embodiments of the present application will be described with reference to the accompanying drawings.

[0070] Figure 1 This is a flowchart of a method for detecting tire tread abnormality according to an embodiment of the present application.

[0071] Before introducing the tire tread abnormality detection method proposed in the embodiment of the present application, the detection principle involved in the tire tread abnormality detection method and the tire tread abnormality detection system involved in the tire tread abnormality detection method are briefly introduced.

[0072] Specifically, when a vehicle is driving normally on the road, if a hard object that is not easy to fall off is attached to a tire, the foreign object will collide with the road surface every time the tire rotates one circle. This collision will produce a sound that is clearly different from the sound of a normal tire rolling over the road (referred to as abnormal sound). This abnormal sound is generated periodically, and its period is equal to the time it takes for the corresponding tire to rotate one circle. Therefore, the following key elements are required to identify the foreign object and its location:

[0073] (1) Collect periodic abnormal noises that are different from normal driving noises;

[0074] (2) The period of the abnormal sound must be the same as the time it takes for the corresponding tire to rotate one circle, so the real-time rotation speed of the tire is required;

[0075] (3) The corresponding relationship between the phase of the abnormal noise during the generation cycle and the tire rotation angle, as well as the rotational position of the tire when the abnormal noise occurs, so the real-time angle of each tire is required;

[0076] (4) To determine which tire is making the abnormal noise, the characteristics of the abnormal noise must be compared with the characteristics of each tire. There are two strategies: one is to rely on the speed difference between the tires when the vehicle is turning. When there is a speed difference between the tires, the rotation speed and cycle will be different. The cycle of the abnormal noise is the same as the rotation cycle of the tire where the foreign object is attached, and the abnormal tire can be determined. Although it may not be possible to determine which tire is abnormal when the vehicle is driving in a straight line, it can be promptly notified that there is a foreign object attached to the tire and several locations for investigation can be provided; the other is to use multiple microphones to identify the source direction of the abnormal noise in stereo form, determine which tire makes the sound, and determine the precise location earlier.

[0077] Further, Figure 2 This is a structural diagram of a tire tread abnormality detection system according to an embodiment of the present application. Figure 2 As shown, the system includes: a position sensor 1, a signal ring gear 2, a microphone 3, a decoder or modem 4, a computer 5 and an information display screen 6.

[0078] Among them, position sensor 1: through the four-wheel independent wheel speed sensors equipped with ABS (Antilock Brake System) or EPB (Electric Parking Brake), and the simple modification of the signal ring gear 2, it can share the signal information collected by the wheel speed sensor, and then obtain the real-time position of the tire (that is, the real-time rotation angle); the structure of the signal ring gear 2 is the same as that of the engine crankshaft signal ring gear, that is, the ring gear lacks one tooth, and the angle of the tire is determined by counting the position sensor. Conventional wheel speed sensor ring gear (such as Figure 3 (a)) and the position sensor ring gear (as shown Figure 3 (b) The difference lies in whether this tooth is missing. The missing tooth can be used to determine the tire angle position, but this will increase the error in calculating the speed. In this case, it can be compensated by increasing the total number of teeth, or one of the teeth can be made to have a different height from the other teeth to form a sensor ring gear that is compatible with wheel speed and position (such as Figure 3(c) shows), the signal collected by it can identify the tire angle position by a high point or a low point, and will not affect the speed accuracy; the microphone 3 is used to collect sound signals, and its number is not specifically limited, and can be single or multiple, depending on whether it is necessary to determine the abnormal tire by the direction of the sound source; the decoder or modem 4 is used to convert the sound signal into a digital square wave signal, and this function can be integrated by other computers, such as ECU (Electronic Control Unit); the computer 5 can be integrated by the vehicle-mounted processing unit software such as ECU, BCM (Body Control Module), VCU (Vehicle Control Unit), HCU (Hydraulic Control Unit) or configured separately; the information display screen 6 can be a vehicle-mounted multimedia or a separately set display screen, used to display abnormal tires and their abnormal positions.

[0079] In summary, the tire tread abnormality detection method proposed in the embodiment of the present application can adopt the hardware facilities in the existing vehicle system, reduce unnecessary cost investment, and have a higher degree of integration; it can identify abnormalities through sound and is not restricted by the material of foreign objects; it can provide early warning of tread abnormalities and better prevent problems such as tire leakage; it can provide the location of the abnormality to assist the driver or maintenance personnel to accurately eliminate the abnormality and perform timely maintenance.

[0080] like Figure 1 As shown, the tire tread abnormality detection method includes the following steps:

[0081] In step S101 , a ring gear signal of at least one tire is collected, and a real-time position of at least one tire and a rotation period of at least one tire are generated according to the ring gear signal of at least one tire.

[0082] It is understood that embodiments of the present application can collect ring gear signals from at least one tire using sensors (including wheel speed sensors and position sensors). Each of the four wheels is equipped with four independently controlled ring gears, which function as both wheel speed sensors and position sensors. The wheel speed sensors can collect tire rotational speeds, thereby obtaining the tire's rotational cycle, while the position sensors can collect the tire's real-time position. After collecting the ring gear signals from at least one tire, embodiments of the present application can use a variety of methods to obtain the real-time position of at least one tire and the rotational cycle of at least one tire.

[0083] As a possible implementation method, in some embodiments, the real-time position of at least one tire and the rotation period of at least one tire are generated based on the ring gear signal of at least one tire, including: decoding the ring gear signal of at least one tire to obtain the decoded ring gear signal of at least one tire; based on the correspondence between the sector and the ring gear, calculating the real-time position of at least one tire and the rotation period of at least one tire based on the decoded ring gear signal of at least one tire.

[0084] Specifically, during vehicle driving, the gear ring signal of at least one tire collected by at least one signal gear ring is decoded to obtain the decoded gear ring signal of at least one tire. Based on the corresponding relationship between the sector and the gear ring, a real-time tire rotation angle data curve is generated, such as Figure 4 As shown (from top to bottom, left front tire, right front tire, left rear tire, right rear tire), the curve is a periodic curve, and the period of the curve is the benchmark period for subsequent judgment of abnormal noise.

[0085] It should be noted that, in some embodiments, before calculating the real-time position of at least one tire and the rotation period of at least one tire according to the decoded ring gear signal of at least one tire based on the correspondence between the sector and the ring gear, it also includes: obtaining the signal tooth position of at least one tire and the sector partition of at least one tire; calibrating the signal tooth position of at least one tire and the sector partition of at least one tire to obtain the correspondence between the sector and the ring gear.

[0086] Specifically, if Figure 5 As shown, the direction corresponding to the signal tooth position is recorded as the first sector of the tire. The tire can be divided into corresponding sectors according to the number of teeth. For example, in the embodiment of the present application, the tire can be divided into 32 sectors. By calibrating the signal tooth position of at least one tire and the sector of at least one tire, the corresponding relationship between the sector and the gear ring can be obtained, as shown in FIG. Figure 6 shown.

[0087] In step S102, a sound signal of at least one tire is collected. If at least one abnormal tire is identified on the current vehicle based on the sound signal of at least one tire, the sector position of the at least one abnormal tire is determined based on the sound wave period obtained from the sound signal and the real-time position of the at least one tire.

[0088] It can be understood that the embodiment of the present application can collect the sound signal of at least one tire through at least one microphone. After collecting the sound signal of at least one tire, the embodiment of the present application can use multiple methods to identify whether there is at least one abnormal tire on the current vehicle.

[0089] As a possible implementation method, in some embodiments, identifying that the current vehicle has at least one abnormal tire based on the sound signal of at least one tire includes: decoding the sound signal of the at least one tire to obtain a digitized square wave signal of the at least one tire; determining whether there is a digitized square wave signal that meets a preset abnormality condition in the digitized square wave signal of the at least one tire; if there is a digitized square wave signal that meets the preset abnormality condition in the digitized square wave signal of the at least one tire, determining that the current vehicle has at least one abnormal tire.

[0090] Specifically, the sound signal of at least one tire collected by the microphone is digitized through a decoder or modem, and the signal is compressed to obtain a digitized square wave signal of the at least one tire, which is input into a computer. If the computer recognizes that the digitized square wave signal of at least one tire contains a digitized square wave signal that meets a preset abnormality condition, it indicates that the current vehicle has at least one abnormal tire.

[0091] Furthermore, in some embodiments, determining the sector position of at least one abnormal tire based on a sound wave period obtained from a sound signal and the real-time position of at least one tire includes: generating a sound wave period based on a digitized square wave signal that meets a preset abnormality condition; aligning the sound wave period with the time axis of the sound signal of at least one tire, and obtaining the sector position of at least one abnormal tire based on the real-time position of at least one tire corresponding to a maximum volume point in the sound wave period.

[0092] Specifically, when an abnormal tire exists, a sound wave cycle (i.e., abnormal sound cycle) is generated based on the digitized square wave signal that meets the preset abnormality conditions. The sound wave cycle is aligned with the time axis of the sound signal of at least one tire, and the current sector coordinates can be read through the maximum volume point in the sound wave cycle, such as Figure 7 As shown, Figure 7 (a) is the curve of the sound signal, Figure 7 (b) Figure 7 (a) The simplified curve, Figure 7 (c) is the real-time rotation angle data curve of the left rear tire, Figure 7 (d) is the real-time rotation angle data curve of the right rear tire, Figure 7 (a) and (b) show that the maximum volume point corresponds to time point 12, and time point 12 corresponds to Figure 7 (c) Sector 1 of the left rear tire corresponds to Figure 7 (d) Sector 7 of the right rear tire, from which the sector position of the foreign object in the tire can be obtained.

[0093] In step S103, when it is recognized that the current vehicle is in a curve, at least one target wheel is determined based on the sound wave period and the rotation period of at least one tire, and at least one final abnormal tire and the abnormal position of each final abnormal tire are determined based on the sector position of the at least one target wheel and the at least one abnormal tire.

[0094] Further, in some embodiments, when it is identified that the current vehicle is in a curve, at least one target wheel is determined based on the sound wave period and the rotation period of at least one tire, including: obtaining the curve rotation period of at least one tire when the current vehicle is in a curve; determining at least one target wheel based on the wheel having the same curve rotation period and sound wave period as at least one tire.

[0095] Specifically, when the vehicle is traveling on a curve, the speeds of the four wheels are different, which will cause the rotation periods of the four wheels to change accordingly. Figure 8 As shown, the cornering rotation period and the sound wave period of at least one tire can be compared, wherein the wheel with the same cornering rotation period and the sound wave period is the target wheel (at least one abnormal tire). Combined with the sector position, at least one final abnormal tire and the abnormal position of each final abnormal tire can be determined.

[0096] Furthermore, in some embodiments, after determining at least one final abnormal tire and the abnormal position of each final abnormal tire based on the sector position of at least one target wheel and at least one abnormal tire, it also includes: controlling the vehicle to display the at least one final abnormal tire and the abnormal position of each final abnormal tire; and / or, sending the at least one final abnormal tire and the abnormal position of each final abnormal tire to a preset mobile terminal.

[0097] It is understandable that this embodiment can also notify the driver of the final foreign object location information, that is, at least one final abnormal tire and the abnormal location of each final abnormal tire, through the vehicle display screen, or send the final foreign object location information to a preset mobile terminal (such as a mobile phone), or control the vehicle display to display the final foreign object location information while also sending the information to the preset mobile terminal to remind the driver to repair it as soon as possible.

[0098] In order to facilitate those skilled in the art to further understand the tire tread abnormality detection method proposed in the embodiment of the present application, the following is combined with Figure 9 Provide further explanation.

[0099] like Figure 9 As shown, when there is an abnormality in the vehicle tire, the method includes the following steps:

[0100] Step S901: collecting a gear ring signal of at least one tire through a sensor.

[0101] Step S902: The decoder decodes the ring gear signal.

[0102] Step S903: calibrate the signal tooth position of at least one tire and the sector area of ​​at least one tire according to the number of signal teeth.

[0103] Step S904: Obtain the correspondence between the sectors and the ring gear.

[0104] Step S905: Based on the corresponding relationship and the decoded gear ring signal of at least one tire, the computer can calculate the real-time rotation angle of the tire and identify the cycle.

[0105] Step S906: Obtain a periodic curve of the relationship between the tire sector and time. Execute step S912.

[0106] Step S907: collecting sound signals of at least one tire using a microphone.

[0107] Step S908: compress and decode the sound signal into a square wave (ie, a digitized square wave signal) through a decoder.

[0108] Step S909: Generate a sound wave cycle according to the digitized square wave signal.

[0109] Step S910 , identifying the time point (ie, real-time position) of at least one tire corresponding to the maximum volume point in the sound wave cycle and recording the cycle.

[0110] Step S911: Obtain the time point and period corresponding to the abnormal noise generation, that is, the sector position and period of at least one abnormal tire.

[0111] In step S912, the computer aligns and compares the acoustic wave period and the periodic curve of the tire sector and time relationship.

[0112] Step S913: Determine whether the sound wave period is the same as the rotation period of a tire. If so, execute step S914; otherwise, execute step S912.

[0113] Step S914: determine at least one target wheel based on at least one wheel having the same turning cycle and sound wave cycle as the tire, and then feed back at least one final abnormal tire and the abnormal position of each final abnormal tire based on the relationship between the wheel and the sector.

[0114] Step S915: Display at least one final abnormal tire and the abnormal position of each final abnormal tire on a display screen to remind the driver to perform maintenance.

[0115] According to the tire tread abnormality detection method proposed in the embodiment of the present application, the real-time position and rotation cycle of each tire are generated based on the collected gear ring signal of at least one tire. When the current vehicle is identified as having an abnormal tire based on the sound signal collected from at least one tire, the sector position of at least one abnormal tire is determined based on the sound wave cycle obtained from the sound signal and the real-time position of the corresponding tire. When the current vehicle is in a curve, at least one final abnormal tire and the abnormal position of each final abnormal tire are determined based on the sector position of at least one target wheel and at least one abnormal tire determined by the sound wave cycle and the rotation cycle of at least one tire. In this way, the abnormal position of the tire is identified through sound, which assists maintenance personnel in accurately eliminating the abnormality, solving the problem of requiring users to use other tools to find the location of foreign objects, or the inability to detect non-metallic objects and the high cost. While reducing costs, it greatly improves vehicle safety.

[0116] Next, the tire tread abnormality detection device proposed in accordance with an embodiment of the present application will be described with reference to the accompanying drawings.

[0117] Figure 10 It is a block diagram of a tire tread abnormality detection device according to an embodiment of the present application.

[0118] like Figure 10 As shown, the tire tread abnormality detection device 10 includes: a generation module 100, a processing module 200 and a determination module 300.

[0119] The generating module 100 is configured to collect a ring gear signal of at least one tire and generate a real-time position of at least one tire and a rotation period of at least one tire based on the ring gear signal of at least one tire;

[0120] a processing module 200 configured to collect a sound signal from at least one tire, and if at least one abnormal tire is identified on the current vehicle based on the sound signal from at least one tire, determine a sector position of the at least one abnormal tire based on a sound wave period obtained from the sound signal and a real-time position of the at least one tire; and

[0121] The determination module 300 is used to determine at least one target wheel based on the sound wave period and the rotation period of at least one tire when it is recognized that the current vehicle is in a curve, and to determine at least one final abnormal tire and the abnormal position of each final abnormal tire based on the sector position of the at least one target wheel and the at least one abnormal tire.

[0122] Furthermore, in some embodiments, after determining at least one final abnormal tire and the abnormal position of each final abnormal tire based on the sector position of at least one target wheel and at least one abnormal tire, the determination module 300 is further configured to:

[0123] controlling the vehicle to display at least one final abnormal tire and an abnormal position of each final abnormal tire;

[0124] And / or, sending at least one final abnormal tire and the abnormal location of each final abnormal tire to a preset mobile terminal.

[0125] Furthermore, in some embodiments, the generating module 100 is specifically configured to:

[0126] decoding a ring gear signal of at least one tire to obtain a decoded ring gear signal of at least one tire;

[0127] Based on the correspondence between the sectors and the ring gear, the real-time position of the at least one tire and the rotation period of the at least one tire are calculated according to the decoded ring gear signal of the at least one tire.

[0128] Furthermore, in some embodiments, before calculating the real-time position of at least one tire and the rotation period of at least one tire according to the decoded ring gear signal of at least one tire based on the correspondence between the sectors and the ring gear, the generating module 100 is further configured to:

[0129] Obtaining a signal tooth position of at least one tire and a sector division of at least one tire;

[0130] The signal tooth position of at least one tire and the sector division of at least one tire are calibrated to obtain the corresponding relationship between the sector and the ring gear.

[0131] Furthermore, in some embodiments, the processing module 200 is specifically configured to:

[0132] decoding a sound signal of at least one tire to obtain a digitized square wave signal of at least one tire;

[0133] determining whether there is a digitized square wave signal meeting a preset abnormal condition among the digitized square wave signals of at least one tire;

[0134] If there is a digitized square wave signal that meets a preset abnormal condition among the digitized square wave signals of at least one tire, it is determined that the current vehicle has at least one abnormal tire.

[0135] Furthermore, in some embodiments, the processing module 200 is specifically configured to:

[0136] generating an acoustic wave cycle according to a digitized square wave signal that meets a preset abnormality condition;

[0137] The sound wave cycle and the time axis of the sound signal of at least one tire are aligned, and the sector position of at least one abnormal tire is obtained according to the real-time position of the at least one tire corresponding to the maximum volume point in the sound wave cycle.

[0138] Furthermore, in some embodiments, the determination module 300 is specifically configured to:

[0139] Obtaining a curve rotation period of at least one tire when the vehicle is currently in a curve;

[0140] At least one target wheel is determined based on at least one wheel having a same cornering rotation period and a same sound wave period as its tire.

[0141] It should be noted that the above explanation of the embodiment of the tire tread abnormality detection method is also applicable to the tire tread abnormality detection device of this embodiment, and will not be repeated here.

[0142] According to the tire tread abnormality detection device proposed in the embodiment of the present application, the real-time position and rotation cycle of each tire are generated based on the collected gear ring signal of at least one tire. When the current vehicle is identified to have an abnormal tire based on the sound signal collected from at least one tire, the sector position of at least one abnormal tire is determined based on the sound wave cycle obtained from the sound signal and the real-time position of the corresponding tire. When the current vehicle is in a curve, at least one final abnormal tire and the abnormal position of each final abnormal tire are determined based on the sector position of at least one target wheel and at least one abnormal tire determined by the sound wave cycle and the rotation cycle of at least one tire. Thus, the abnormal position of the tire is identified by sound, which assists maintenance personnel in accurately eliminating the abnormality, solving the problem of requiring users to use other tools to find the location of foreign objects, or the problem of being unable to detect non-metallic objects and high costs. While reducing costs, it greatly improves vehicle safety.

[0143] Figure 11 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0144] A memory 1101 , a processor 1102 , and a computer program stored in the memory 1101 and executable on the processor 1102 .

[0145] When the processor 1102 executes the program, the tire tread abnormality detection method provided in the above embodiment is implemented.

[0146] Furthermore, the vehicle further comprises:

[0147] The communication interface 1103 is used for communication between the memory 1101 and the processor 1102 .

[0148] The memory 1101 is used to store computer programs that can be run on the processor 1102 .

[0149] The memory 1101 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0150] If the memory 1101, the processor 1102, and the communication interface 1103 are implemented independently, the communication interface 1103, the memory 1101, and the processor 1102 can be connected to each other via a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0151] Optionally, in a specific implementation, if the memory 1101, the processor 1102 and the communication interface 1103 are integrated on a chip, the memory 1101, the processor 1102 and the communication interface 1103 can communicate with each other through an internal interface.

[0152] The processor 1102 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0153] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above tire tread abnormality detection method.

[0154] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0155] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0156] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for detecting tire tread abnormality, characterized in that: The following steps are involved: collecting a ring gear signal of at least one tire, and generating a real-time position of the at least one tire and a rotation period of the at least one tire according to the ring gear signal of the at least one tire; collecting a sound signal of at least one tire, and if at least one abnormal tire is identified on the current vehicle based on the sound signal of the at least one tire, determining a sector position of the at least one abnormal tire based on a sound wave period obtained from the sound signal and a real-time position of the at least one tire; as well as When it is recognized that the current vehicle is in a curve, determining at least one target wheel according to the sound wave period and the rotation period of the at least one tire, and determining at least one final abnormal tire and the abnormal position of each final abnormal tire according to the at least one target wheel and the sector position of the at least one abnormal tire; The identifying that the current vehicle has at least one abnormal tire based on the sound signal of the at least one tire includes: decoding the sound signal of the at least one tire to obtain a digitized square wave signal of the at least one tire, determining whether a digitized square wave signal that satisfies a preset abnormality condition exists in the digitized square wave signal of the at least one tire, and determining that the current vehicle has the at least one abnormal tire if the digitized square wave signal that satisfies the preset abnormality condition exists in the digitized square wave signal of the at least one tire; The determining of the sector position of the at least one abnormal tire based on the sound wave period obtained from the sound signal and the real-time position of the at least one tire includes: generating the sound wave period based on the digitized square wave signal that meets the preset abnormality condition, aligning the sound wave period with the time axis of the sound signal of the at least one tire, and obtaining the sector position of the at least one abnormal tire based on the real-time position of the at least one tire corresponding to the maximum volume point in the sound wave period.

2. The method according to claim 1, characterized in that After determining the abnormal position of the at least one final abnormal tire and each of the final abnormal tires according to the sector position of the at least one target wheel and the at least one abnormal tire, the method further includes: controlling the vehicle to display the at least one final abnormal tire and the abnormal position of each final abnormal tire; And / or, sending the at least one final abnormal tire and the abnormal location of each final abnormal tire to a preset mobile terminal.

3. The method according to claim 1, characterized in that Generating the real-time position of the at least one tire and the rotation period of the at least one tire according to the ring gear signal of the at least one tire comprises: decoding the ring gear signal of the at least one tire to obtain a decoded ring gear signal of the at least one tire; Based on the correspondence between the sectors and the ring gear, the real-time position of the at least one tire and the rotation period of the at least one tire are calculated according to the decoded ring gear signal of the at least one tire.

4. The method according to claim 3, characterized in that Before calculating the real-time position of the at least one tire and the rotation period of the at least one tire according to the decoded ring gear signal of the at least one tire based on the correspondence between the sectors and the ring gear, the method further includes: Acquire a signal tooth position of the at least one tire and a sector division of the at least one tire; The signal tooth position of the at least one tire and the sector division of the at least one tire are calibrated to obtain a corresponding relationship between the sector and the ring gear.

5. The method according to claim 1, wherein The method of identifying that the current vehicle is in a curve and determining at least one target wheel according to the sound wave period and the rotation period of the at least one tire includes: Obtaining a curve rotation period of at least one tire when the current vehicle is in a curve; The at least one target wheel is determined based on the at least one wheel having the same cornering rotation period and sound wave period as the at least one tire.

6. A tire tread abnormality detection device, characterized in that: include: a generating module, configured to collect a ring gear signal of at least one tire, and generate a real-time position of the at least one tire and a rotation period of the at least one tire according to the ring gear signal of the at least one tire; a processing module configured to collect a sound signal of at least one tire, and if at least one abnormal tire is identified on the current vehicle based on the sound signal of the at least one tire, determine a sector position of the at least one abnormal tire based on a sound wave period obtained from the sound signal and a real-time position of the at least one tire; as well as a determination module, configured to, when recognizing that the current vehicle is in a curve, determine at least one target wheel based on the sound wave period and the rotation period of the at least one tire, and determine at least one final abnormal tire and an abnormal position of each final abnormal tire based on the at least one target wheel and the sector position of the at least one abnormal tire; The processing module is specifically configured to: decode the sound signal of the at least one tire to obtain a digitized square wave signal of the at least one tire, determine whether a digitized square wave signal that satisfies a preset abnormality condition exists in the digitized square wave signal of the at least one tire, and determine that the current vehicle has the at least one abnormal tire if the digitized square wave signal that satisfies the preset abnormality condition exists in the digitized square wave signal of the at least one tire; The sound wave cycle is generated based on the digitized square wave signal that meets the preset abnormality condition, the time axis of the sound wave cycle and the sound signal of the at least one tire are aligned, and the sector position of the at least one abnormal tire is obtained based on the real-time position of the at least one tire corresponding to the maximum volume point in the sound wave cycle.

7. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the tire tread abnormality detection method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the tire tread abnormality detection method according to any one of claims 1 to 5.

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