Tire pressure detection method, device, equipment, medium and program product

Abstract

The invention discloses a tire pressure detection method, device and equipment, a medium and a program product, and relates to the technical field of tire detection. The method comprises the following steps: acquiring a target tire image; performing edge detection on the target tire image, and extracting a maximum deformation point of the outer side of the target tire in contact with the ground and a first reference line of the inner side of the target tire in contact with a spoke frame; detecting the reference distance between the spoke end point and the maximum deformation point, and obtaining the spoke end points on the two sides of the closest spoke end point corresponding to the minimum reference distance to obtain a first spoke reference point and a second spoke reference point; constructing a tire pressure detection reference area of the target tire according to the maximum deformation point, the first spoke reference point and the second spoke reference point; and detecting the overlapping condition of the first reference line and the tire pressure detection reference area, and determining the tire pressure state of the target tire. According to the technical scheme, the labor cost consumed by tire pressure detection is reduced, and the tire pressure detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the field of tire detection technology, and in particular to a tire pressure detection method, device, equipment, medium and program product. Background Art

[0002] As the number of vehicles continues to increase, vehicle safety issues are receiving more and more attention. Tires are one of the most important parts of vehicles, and tire pressure directly affects the driving safety, comfort, and fuel economy of the vehicle.

[0003] The traditional method of tire pressure detection is manual tire pressure detection. Manual tire pressure detection requires the driver to regularly use a tire pressure gauge to measure, which is time-consuming and labor-intensive and prone to missed detection. Summary of the invention

[0004] The present invention provides a tire pressure detection method, device, equipment, medium and program product, which reduce the manpower cost consumed by tire pressure detection and improve the efficiency and accuracy of tire pressure detection.

[0005] According to one aspect of the present invention, a tire pressure detection method is provided, the method comprising:

[0006] Acquire a target tire image of a target tire;

[0007] Performing edge detection on the target tire image to extract the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame;

[0008] Detecting the reference distance between the spoke end point and the maximum deformation point, and obtaining the spoke end points on both sides of the nearest spoke end point corresponding to the minimum value of the reference distance, to obtain a first spoke reference point and a second spoke reference point;

[0009] constructing a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point;

[0010] An overlap between the first reference line and the tire pressure detection reference area is detected to determine the tire pressure state of the target tire.

[0011] According to another aspect of the present invention, there is provided a tire pressure detection device, the device comprising:

[0012] A target tire image acquisition module, used to acquire a target tire image of a target tire;

[0013] A first reference line extraction module is used to perform edge detection on the target tire image, extract the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame;

[0014] A spoke reference point detection module, used to detect the reference distance between the spoke end point and the maximum deformation point, and obtain the spoke end points on both sides of the nearest spoke end point corresponding to the minimum value of the reference distance, to obtain a first spoke reference point and a second spoke reference point;

[0015] a tire pressure detection reference area construction module, configured to construct a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point;

[0016] The tire pressure status detection module is used to detect the overlap between the first reference line and the tire pressure detection reference area to determine the tire pressure status of the target tire.

[0017] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0018] at least one processor; and

[0019] a memory communicatively connected to the at least one processor; wherein,

[0020] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the tire pressure detection method described in any embodiment of the present invention.

[0021] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the tire pressure detection method described in any embodiment of the present invention when executed.

[0022] According to another aspect of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, the tire pressure detection method according to any embodiment of the present invention is implemented.

[0023] The technical solution of the embodiment of the present invention performs edge detection on the target tire image, extracts the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame, detects the reference distance between the spoke end point and the maximum deformation point, and obtains the spoke end points on both sides of the nearest spoke end point corresponding to the minimum value of the reference distance, obtains the first spoke reference point and the second spoke reference point, constructs a tire pressure detection reference area for the target tire according to the maximum deformation point, the first spoke reference point and the second spoke reference point, detects the overlap between the first reference line and the tire pressure detection reference area The tire pressure status of the target tire is determined by the geometric construction method, and the tire pressure detection is performed on the area of ​​the target tire with the most serious deformation. The tire deformation details of the target tire can be captured in more detail to avoid the errors that may be caused by simple point or single-line detection, thereby reducing the missed reports and false alarms of tire pressure detection, and thus improving the accuracy of tire pressure detection; and by automatically detecting the tire pressure status, the manpower cost consumed by tire pressure detection can be reduced and the detection efficiency of tire pressure status can be improved; in addition, the safety, comfort and fuel economy of vehicle driving can be improved.

[0024] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a flow chart of a tire pressure detection method provided according to Embodiment 1 of the present invention;

[0027] Figure 2 is a flow chart of a tire pressure detection method provided according to Embodiment 2 of the present invention;

[0028] Figure 3 is a flow chart of a tire pressure detection method provided according to Embodiment 2 of the present invention;

[0029] Figure 4 is a schematic diagram of tire pressure detection applicable to the second embodiment of the present invention;

[0030] Figure 5 is a structural schematic diagram of a tire pressure detection device provided according to Embodiment 3 of the present invention;

[0031] Figure 6 It is a structural schematic diagram of an electronic device for implementing the tire pressure detection method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] Embodiment 1

[0035] Figure 1 This is a flow chart of a tire pressure detection method provided in Embodiment 1 of the present invention. The embodiment of the present invention can be applied to the situation of performing tire pressure detection on different types of vehicles. The method can be performed by a tire pressure detection device, which can be implemented in the form of hardware and / or software. The tire pressure detection device can be configured in an electronic device that carries the tire pressure detection function, such as a vehicle-mounted terminal.

[0036] See also Figure 1 The tire pressure detection method shown includes:

[0037] S110, acquiring a target tire image of a target tire.

[0038] The target tire may be a tire that needs to be tested for tire pressure. Optionally, the target tire may be a car tire, a motorcycle tire, or a bicycle tire. Preferably, the target tire may be a bicycle tire. The target tire image may be a detection image of the target tire. Optionally, the target tire image may include an original image of the target tire or a preprocessed image of the target tire. For example, the original image of the target tire may be processed in a grayscale manner, and the original image of the target tire may be converted from a color image to a grayscale image to reduce the complexity of the calculation. For another example, a filtering method such as a Gaussian filter or a median filter may be used to perform image denoising on the original image of the target image to enhance edge clarity.

[0039] Specifically, an original image or a preprocessed image of the target tire may be acquired to obtain a target tire image of the target tire.

[0040] S120, performing edge detection on the target tire image, extracting the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame.

[0041] The target tire has an inner side of the target tire and an outer side of the target tire. The inner side of the target tire contacts the spoke frame; the outer side of the target tire contacts the ground. The power device of the vehicle is connected through the spoke frame, thereby realizing the starting, driving and braking of the vehicle. The maximum deformation point can be an outer edge point located on the outer side of the target tire and having the largest deformation. The maximum deformation point can be used to characterize the maximum deformation position of the outer side of the target tire. The first reference line can be a reference line where the inner side of the target tire contacts the spoke frame. The first reference line can be used to characterize the contact degree between the target tire and the spoke frame. That is, the first reference line can be used to characterize the deformation degree of the inner side of the target tire. Optionally, the first reference line may include an actual contact line between the inner side of the target tire and the spoke frame or a straight line obtained by fitting based on the actual contact line. In an optional embodiment of the present invention, the first reference line is parallel to the ground. Compared with the actual contact line between the inner side of the target tire and the spoke frame, the first reference line parallel to the ground is used, and the interference factors of the tire pressure detection state of the target tire are smaller, and the detection efficiency of the tire pressure detection is higher.

[0042] Specifically, an edge detection algorithm may be used to perform edge detection on the target tire image to obtain each outer edge point located on the outer side of the target tire and each inner edge point located on the inner side of the target tire in the target tire image. An image detection algorithm may be used to detect each outer edge point in the target tire image to extract the maximum deformation point where the outer side of the target tire contacts the ground. The same image detection algorithm may be used to detect each inner edge point in the target tire image to extract the first reference line where the inner side of the target tire contacts the spoke frame. Exemplarily, the edge detection algorithm may be the Canny Edge Detection Algorithm (Cornell Edge Detection Algorithm). The image detection algorithm may be the Hough Transform.

[0043] In an optional embodiment of the present invention, the target tire image is detected and the maximum deformation point where the outer side of the target tire contacts the ground is extracted, including: performing edge detection on the target tire image to extract a second reference line where the outer side of the target tire contacts the ground; and determining the midpoint of the second reference line as the maximum deformation point where the outer side of the target tire contacts the ground.

[0044] The second reference line may be a reference line where the outer side of the target tire contacts the ground. The second reference line may be used to characterize the degree of contact between the target tire and the ground. That is, the second reference line may be used to characterize the degree of deformation of the outer side of the target tire. Optionally, the second reference line may include an actual contact line between the outer side of the target tire and the ground or a straight line fitted based on the actual contact line. Optionally, the second reference line may also be parallel to the ground. Compared to using the actual contact line between the outer side of the target tire and the ground, using a second reference line parallel to the ground reduces interference factors for the tire pressure detection state of the target tire and increases the detection efficiency of the tire pressure detection.

[0045] Specifically, the same image detection algorithm can be used to detect each outer edge point in the target tire image to extract the second reference line where the outer side of the target tire contacts the ground. The midpoint of the second reference line can be determined as the maximum deformation point where the outer side of the target tire contacts the ground.

[0046] This solution performs edge detection on the target tire image, extracts the second reference line where the outer side of the target tire contacts the ground, and determines the midpoint of the second reference line as the maximum deformation point where the outer side of the target tire contacts the ground, thereby improving the efficiency of determining the maximum deformation point and further improving the detection efficiency of the tire pressure detection status of the target tire.

[0047] S130, detecting a reference distance between a spoke end point and a maximum deformation point, and obtaining spoke end points on both sides of a nearest spoke end point corresponding to a minimum value of the reference distance, to obtain a first spoke reference point and a second spoke reference point.

[0048] For different types of vehicles, there are spokes and spoke frames. The spoke end point can be the intersection between the spoke and the spoke frame. The reference distance can be the image distance between the spoke end point and the maximum deformation point. The nearest spoke end point can be the spoke end point that is closest to the reference distance between the maximum deformation point. The spoke end points on both sides of the nearest spoke end point can be the spoke end points that are the second closest and the third closest to the reference distance between the maximum deformation point. That is, the first spoke reference point can be the spoke end point that is the second closest to the reference distance between the maximum deformation point; the third spoke reference point can be the spoke end point that is the third closest to the reference distance between the maximum deformation point. In comparison, when the tire pressure of the target tire changes, the edge points on the target tire change relative to the center point of the target tire, but the spoke end points on the spoke frame are fixed relative to the center point of the target tire.

[0049] Specifically, a key point detection network can be used to detect the target tire image to obtain the spoke end points of each target tire. The reference distance between each spoke end point and the maximum deformation point can be calculated, and the reference distances corresponding to each spoke end point can be compared to determine the spoke end point corresponding to the minimum reference distance to obtain the nearest spoke end point. The spoke end points on both sides of the nearest spoke end point can be obtained to obtain the first spoke reference point and the second spoke reference point. Exemplarily, the key point detection network can be HRNET (deep neural network for image recognition tasks).

[0050] S140: construct a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point.

[0051] The tire pressure detection reference area of ​​the target tire may be a typical area for tire pressure detection of the target tire. The tire pressure detection reference area of ​​the target tire may include the relative state between the target tire and the ground and the spoke frame. Among them, the maximum deformation point may represent the point where the target tire is most severely deformed, that is, the point corresponding to the relative state of the target tire and the ground. The first spoke reference point and the second spoke reference point are used to characterize the spoke end point near the point where the target tire is most severely deformed. The first spoke reference point and the second spoke reference point can be used to characterize the spoke frame position of the target tire.

[0052] Specifically, the maximum deformation point, the first spoke reference point, and the second spoke reference point may be sequentially connected in a clockwise direction or a counterclockwise direction to obtain a tire pressure detection reference area, wherein the tire pressure detection reference area may be a single triangular area.

[0053] S150: Detect the overlap between the first reference line and the tire pressure detection reference area to determine the tire pressure state of the target tire.

[0054] The first reference line can be used to characterize the relative state between the target tire and the spoke frame. For the target tire, as the target tire pressure decreases, the first reference line will increase, which can be understood as the contact length between the inner side of the target tire and the spoke frame will increase; as the target tire pressure increases, the first reference line will decrease, which can be understood as the contact length between the inner side of the target tire and the spoke frame will decrease. The overlap between the first reference line and the tire pressure detection reference area can be used to characterize the deformation state of the target tire. Further, the overlap between the first reference line and the tire pressure detection reference area can also be used to characterize the tire pressure state of the target tire. Optionally, the overlap between the first reference line and the tire pressure detection reference area can include the overlap state and / or overlap degree between the first reference line and the tire pressure detection reference area. Among them, the overlap state between the first reference line and the tire pressure detection reference area can be used to characterize whether the first reference line overlaps with the tire pressure detection reference area. The overlap degree between the first reference line and the tire pressure detection reference area can be used for the deformation degree between the first reference line and the tire pressure detection reference area. Optionally, the greater the overlap between the first reference line and the tire pressure detection reference area, the more insufficient the tire pressure state of the target tire; the smaller the overlap between the first reference line and the tire pressure detection reference area, the more sufficient the tire pressure state of the target tire. The tire pressure state of the target tire can be used to characterize whether the tire pressure of the target tire is normal. That is, whether the target tire may have air leakage, etc. Exemplarily, the tire pressure state of the target tire can include that the target tire is in a normal pressure state or that the target tire is in an abnormal pressure state.

[0055] Specifically, the overlap between the first reference line and the tire pressure detection reference area may be detected, and the tire pressure state of the target tire may be determined based on the overlap between the first reference line and the tire pressure detection reference area.

[0056] Optionally, when it is determined that the target tire is in an abnormal air pressure state, an abnormal warning message is issued to prompt the driver that the tire pressure of the target tire is insufficient, so that the driver can adjust the tire pressure state of the target tire.

[0057] The technical solution of the embodiment of the present invention performs edge detection on the target tire image, extracts the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame, detects the reference distance between the spoke end point and the maximum deformation point, and obtains the spoke end points on both sides of the nearest spoke end point corresponding to the minimum value of the reference distance, obtains the first spoke reference point and the second spoke reference point, constructs a tire pressure detection reference area for the target tire according to the maximum deformation point, the first spoke reference point and the second spoke reference point, detects the overlap between the first reference line and the tire pressure detection reference area The tire pressure status of the target tire is determined by the geometric construction method, and the tire pressure detection is performed on the area of ​​the target tire with the most serious deformation. The tire deformation details of the target tire can be captured in more detail to avoid the errors that may be caused by simple point or single-line detection, thereby reducing the missed reports and false alarms of tire pressure detection, and thus improving the accuracy of tire pressure detection; and by automatically detecting the tire pressure status, the manpower cost consumed by tire pressure detection can be reduced and the detection efficiency of tire pressure status can be improved; in addition, the safety, comfort and fuel economy of vehicle driving can be improved.

[0058] Embodiment 2

[0059] Figure 2 A flow chart of a tire pressure detection method provided for the second embodiment of the present invention. Based on the above embodiments, the embodiment of the present invention concretizes "detecting the overlap between the first reference line and the tire pressure detection reference area to determine the tire pressure state of the target tire" as "detecting the overlap between the first reference line and the tire pressure detection area; when the overlap is that there is an overlap, determining that the target tire is in an abnormal pressure state; when the overlap is that there is no overlap, determining that the target tire is in a normal pressure state", which can improve the detection efficiency of the tire pressure state of the vehicle tire. It should be noted that for the parts not described in detail in the embodiments of the present invention, please refer to the description of other embodiments.

[0060] See also Figure 2 The tire pressure detection method shown includes:

[0061] S210: Acquire a target tire image of a target tire.

[0062] S220, performing edge detection on the target tire image, extracting the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame.

[0063] S230, detecting a reference distance between a spoke end point and a maximum deformation point, and obtaining spoke end points on both sides of a nearest spoke end point corresponding to a minimum value of the reference distance, to obtain a first spoke reference point and a second spoke reference point.

[0064] S240: construct a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point.

[0065] S250: Detect an overlapping state between the first reference line and the tire pressure detection area.

[0066] The overlapping state between the first reference line and the tire pressure detection reference area can be used to indicate whether the first reference line and the tire pressure detection reference area overlap. The overlapping state between the first reference line and the tire pressure detection reference area can include the presence of overlap and the absence of overlap.

[0067] Specifically, it is possible to detect whether there is overlap between the first reference line and the tire pressure detection area, and determine the overlapping state between the first reference line and the tire pressure detection area.

[0068] S260: When the overlapping state is that there is an overlap, determine that the target tire is in an abnormal air pressure state.

[0069] The overlap state is overlapped, which can be understood as the first reference line has crossed the tire pressure detection reference area, at which time it can be determined that the target tire is abnormal. The target tire being in an abnormal air pressure state can be used to indicate that the tire pressure state of the target tire is abnormal.

[0070] Specifically, when the overlapping state is that there is an overlap, it can be determined that the target tire is in an abnormal air pressure state.

[0071] S270: When the overlapping state is that there is no overlap, determine that the target tire is in a normal air pressure state.

[0072] The overlapping state is that there is no overlap, which can be understood as the first reference line does not cross the tire pressure detection reference area. At this time, it can be determined that the target tire is normal. The target tire is in a normal air pressure state, which can be used to indicate that the tire pressure state of the target tire is normal.

[0073] Specifically, when the overlapping state is that there is no overlap, it can be determined that the target tire is in a normal air pressure state.

[0074] In an optional embodiment of the present invention, a tire pressure detection reference area of ​​the target tire is constructed based on the maximum deformation point, the first spoke reference point and the second spoke reference point, including: sequentially connecting the maximum deformation point, the first spoke reference point and the second spoke reference point to construct a first tire pressure detection reference area for the target tire; accordingly, determining that the target tire is in an abnormal air pressure state includes: detecting the degree of overlap between the first reference line and the first tire pressure detection area; when the first reference line and the first tire pressure detection area overlap unilaterally, determining that the target tire is in a first abnormal air pressure state; when the first reference line and the first tire pressure detection area overlap bilaterally, determining that the target tire is in a second abnormal air pressure state.

[0075] The first tire pressure detection reference area may be a tire pressure detection reference area formed by the maximum deformation point, the first spoke reference point, and the second spoke reference point. The first tire pressure detection reference area may be used to characterize the typical detection area corresponding to the most severely deformed point of the target tire. The degree of overlap between the first reference line and the tire pressure detection reference area may be used to characterize the degree of deformation between the first reference line and the tire pressure detection reference area. Further, the degree of overlap between the first reference line and the tire pressure detection reference area may also be used to more accurately characterize the tire pressure state of the target tire. The first abnormal air pressure state may be the tire pressure state of the target tire when the first reference line and the first tire pressure detection area overlap on one side. The second abnormal air pressure state may be the tire pressure state of the target tire when the first reference line and the first tire pressure detection area overlap on both sides. The first abnormal air pressure state and the second abnormal air pressure state are both tire pressure states of the target tire; however, the degree of insufficient tire pressure corresponding to the first abnormal air pressure state is lower than the degree of insufficient tire pressure corresponding to the second abnormal air pressure state.

[0076] Specifically, the maximum deformation point, the first spoke reference point, and the second spoke reference point can be connected in sequence along the clockwise direction or the counterclockwise direction to construct the first tire pressure detection reference area of ​​the target tire. Accordingly, the degree of overlap between the first reference line and the first tire pressure detection area can be detected. When the first reference line and the first tire pressure detection area overlap on one side, it is determined that the target tire is in the first abnormal air pressure state. When the first reference line and the first tire pressure detection area overlap on both sides, it is determined that the target tire is in the second abnormal air pressure state.

[0077] Based on detecting the overlapping state between the first reference line and the first tire pressure detection reference area, this scheme further detects the overlapping degree between the first reference line and the first tire pressure detection reference area, thereby further grading the abnormal air pressure state of the target tire and improving the accuracy of tire pressure state detection.

[0078] In an optional embodiment of the present invention, while performing edge detection on the target tire image, extracting the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame, it also includes: extracting the second reference line where the outer side of the target tire contacts the ground; constructing a tire pressure detection reference area for the target tire based on the maximum deformation point, the first spoke reference point, and the second spoke reference point, and also includes: sequentially connecting the second reference line, the maximum deformation point, the first spoke reference point, and the second spoke reference point to obtain a second tire pressure detection reference area; constructing a tire pressure detection reference area for the target tire based on the first tire pressure detection reference area and the second tire pressure detection reference area; accordingly, determining that the target tire is in an abnormal air pressure state also includes: detecting the degree of overlap between the first reference line and the second tire pressure detection area; when the first reference line and the second tire pressure detection area overlap unilaterally, determining that the target tire is in a third abnormal air pressure state; when the first reference line and the second tire pressure detection area overlap bilaterally, determining that the target tire is in a fourth abnormal air pressure state.

[0079] The second tire pressure detection reference area may be a tire pressure detection reference area formed by the second reference line, the maximum deformation point, the first spoke reference point and the second spoke reference point. For the target tire, the deformation of the target tire mainly includes the deformation of the contact part between the inner side of the target tire and the spoke frame, and the deformation of the contact part between the outer side of the target tire and the ground. The second tire pressure detection reference area is an extension area of ​​the first tire pressure detection reference area. By detecting the second tire pressure detection reference area, the deformation of the contact part between the outer side of the target tire and the ground not only does not include the maximum deformation point corresponding to the point with the most serious deformation, but also includes the second reference line where the target tire contacts the ground. Compared with the first tire pressure detection reference area, the second tire pressure detection reference area contains more comprehensive information about the contact part between the target tire and the ground. The third abnormal air pressure state may be the tire air pressure state of the target tire when the first reference line and the second tire pressure detection area overlap on one side. The fourth abnormal air pressure state may be the tire air pressure state of the target tire when the first reference line and the second tire pressure detection area overlap on both sides. The third abnormal air pressure state and the fourth abnormal air pressure state are both tire pressure states of the target tire; however, the degree of insufficient tire pressure corresponding to the third abnormal air pressure state is lower than the degree of insufficient tire pressure corresponding to the fourth abnormal air pressure state; the degree of insufficient tire pressure corresponding to the third abnormal air pressure state is higher than the degree of insufficient tire pressure corresponding to the second abnormal air pressure state.

[0080] Specifically, while edge detection is performed on the target tire image to extract the maximum deformation point where the outer side of the target tire contacts the ground and the first reference line where the inner side of the target tire contacts the spoke frame, the same image detection algorithm can be used to detect each outer edge point in the target tire image to extract the second reference line where the outer side of the target tire contacts the ground. The second reference line, the maximum deformation point, the first spoke reference point and the second spoke reference point can be sequentially connected in a clockwise or counterclockwise direction to obtain a second tire pressure detection reference area. The first tire pressure detection reference area and the second tire pressure detection reference area can be combined to construct a tire pressure detection reference area for the target tire. Accordingly, the degree of overlap between the first reference line and the second tire pressure detection area can be detected. When the first reference line overlaps the second tire pressure detection area on one side, it is determined that the target tire is in the third abnormal air pressure state; when the first reference line overlaps the second tire pressure detection area on both sides, it is determined that the target tire is in the fourth abnormal air pressure state.

[0081] Based on the first tire pressure detection reference area, this scheme extends outward to obtain a second tire pressure detection reference area, which contains more comprehensive contact information between the target tire and the ground, and can improve the accuracy of the tire pressure status detection of the target tire; at the same time, based on the second abnormal air pressure state, the degree of overlap between the first reference line and the second tire pressure detection reference area is further detected, thereby achieving further classification of the abnormal air pressure state of the target tire, and further improving the accuracy of the tire pressure status detection of the target tire.

[0082] The technical solution of the embodiment of the present invention detects the overlapping state between the first reference line and the tire pressure detection area, and determines that the target tire is in an abnormal air pressure state when the overlapping state is that there is an overlap, and determines that the target tire is in a normal air pressure state when the overlapping state is that there is no overlap, thereby improving the detection efficiency of the tire pressure state of the vehicle tire.

[0083] Figure 3 FIG. 1 is a flow chart of a tire pressure detection method. Based on the above embodiment, Figure 3 This is a preferred embodiment of the present invention. Figure 3 The tire pressure detection method shown includes:

[0084] S310, acquiring an original image of a target tire, and performing image preprocessing on the original image of the target tire to obtain an image of the target tire.

[0085] Specifically, the original image of the target tire can be grayed out, and the color image can be converted into a gray image to reduce the computational complexity. Gaussian filtering or median filtering can be used to remove image noise, and the gray image can be denoised to enhance edge clarity and obtain the target tire image.

[0086] S320: Perform edge detection on the target tire image to obtain a first reference line and a second reference line.

[0087] Specifically, the Canny edge detection algorithm can be used to extract the inner edge points or outer edge points in the target tire image, highlighting the contact area between the tire and the ground, and the contact area between the tire and the spoke frame. The Hough transform can be used to detect the first reference line where the outer side of the target tire contacts the ground, i.e. Figure 4 The same method can be used to detect the second reference line where the inner side of the target tire contacts the ground, i.e. Figure 4 This is shown by the green horizontal line in the figure.

[0088] S330: Perform key point detection on the target tire image to obtain the end points of each spoke.

[0089] Specifically, the spoke end points in the real-time image (i.e., the target tire image) can be detected based on a key point detection network such as HENET, such as Figure 4 Indicated by the red dot in the middle.

[0090] S340: Construct a tire pressure detection reference area.

[0091] The tire pressure detection reference area is located on the side of the target tire, including the edge in contact with the ground, reflecting the most obvious deformation area of ​​the target tire.

[0092] Specifically, you can draw the perpendicular midline of the purple horizontal line, find the second and third closest spoke end points to the perpendicular midline, and get the first spoke reference point and the second spoke reference point. Connect the first spoke reference point, the second spoke reference point, and the purple horizontal line to construct a quadrilateral. Connect the perpendicular midpoint with the first spoke reference point and the second spoke reference point, and the quadrilateral is divided into three triangles: left, middle, and right, to get the tire pressure detection reference area.

[0093] S350: Determine the tire pressure state of the target tire according to the overlap between the first reference line and the tire pressure detection reference area.

[0094] Specifically, if the green horizontal line passes through three triangles at the same time, that is, the green horizontal line can be detected in the three triangle areas, it indicates that the bottom deformation of the target tire has exceeded the normal range, indicating that the tire pressure is insufficient.

[0095] S360: When it is detected that the target tire is in an abnormal air pressure state, an alarm is issued for the tire pressure state of the target tire.

[0096] Specifically, if it is determined that the tire pressure is insufficient, the alarm system is triggered.

[0097] The geometric construction method of this scheme can capture the details of tire deformation more carefully by partitioning the target tire and avoid the errors that may be caused by simple single-point or single-line detection; it can comprehensively analyze multiple wheel components such as the inner side of the target tire, the outer side of the target tire and the spoke frame, and combine the mid-point line, key points and multiple triangles for analysis, providing a systematic and detailed tire deformation detection method, which improves the accuracy and reliability of tire pressure status detection; in addition, by monitoring the tire pressure status in real time through the camera, tire leakage problems can be quickly discovered, thereby improving driving safety; based on the existing on-board camera and image processing technology, there is no need to install expensive TPMS (Tire Pressure Monitoring System) equipment, which can reduce the cost of tire pressure status detection; combined with image processing and machine learning algorithms, it can accurately determine the tire leakage and reduce false alarms and missed alarms; and it does not require professional installation, and driving users can also use it easily; by monitoring the tire status in real time through the on-board camera, analyzing the tire deformation, and determining whether the tire is leaking, it can overcome the shortcomings of traditional detection methods and provide a low-cost, easy-to-install and easy-to-maintain solution.

[0098] Embodiment 3

[0099] Figure 5 This is a schematic diagram of the structure of a tire pressure detection device provided in Embodiment 3 of the present invention. The embodiment of the present invention can be applied to the situation of performing tire pressure detection on different types of vehicles. The device can execute the tire pressure detection method. The device can be implemented in the form of hardware and / or software. The device can be configured in an electronic device that carries the tire pressure detection function, such as a vehicle-mounted terminal.

[0100] See also Figure 5The tire pressure detection device shown includes: a target tire image acquisition module 510, a first reference line extraction module 520, a spoke reference point detection module 530, a tire pressure detection reference area construction module 540 and a tire pressure status detection module 550. Among them, the target tire image acquisition module 510 is used to acquire the target tire image of the target tire; the first reference line extraction module 520 is used to perform edge detection on the target tire image, extract the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame; the spoke reference point detection module 530 is used to detect the reference distance between the spoke end point and the maximum deformation point, and obtain the spoke end points on both sides of the nearest spoke end point corresponding to the minimum reference distance, and obtain the first spoke reference point and the second spoke reference point; the tire pressure detection reference area construction module 540 is used to construct the tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point and the second spoke reference point; the tire pressure status detection module 550 is used to detect the overlap of the first reference line and the tire pressure detection reference area, and determine the tire pressure status of the target tire.

[0101] The technical solution of the embodiment of the present invention performs edge detection on the target tire image, extracts the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame, detects the reference distance between the spoke end point and the maximum deformation point, and obtains the spoke end points on both sides of the nearest spoke end point corresponding to the minimum value of the reference distance, obtains the first spoke reference point and the second spoke reference point, constructs a tire pressure detection reference area for the target tire according to the maximum deformation point, the first spoke reference point and the second spoke reference point, detects the overlap between the first reference line and the tire pressure detection reference area The tire pressure status of the target tire is determined by the geometric construction method, and the tire pressure detection is performed on the area of ​​the target tire with the most serious deformation. The tire deformation details of the target tire can be captured in more detail to avoid the errors that may be caused by simple point or single-line detection, thereby reducing the missed reports and false alarms of tire pressure detection, and thus improving the accuracy of tire pressure detection; and by automatically detecting the tire pressure status, the manpower cost consumed by tire pressure detection can be reduced and the detection efficiency of tire pressure status can be improved; in addition, the safety, comfort and fuel economy of vehicle driving can be improved.

[0102] In an optional embodiment of the present invention, the tire pressure status detection module 550 includes: an overlapping status detection unit, which is used to detect the overlapping status between the first reference line and the tire pressure detection area; an abnormal pressure status detection unit, which is used to determine that the target tire is in an abnormal pressure state when the overlapping status is that there is overlap; and a normal pressure status detection unit, which is used to determine that the target tire is in a normal pressure state when the overlapping status is that there is no overlap.

[0103] In an optional embodiment of the present invention, the tire pressure detection reference area construction module 540 includes: a first tire pressure detection reference area construction unit, which is used to sequentially connect the maximum deformation point, the first spoke reference point and the second spoke reference point to construct a first tire pressure detection reference area for the target tire; correspondingly, the abnormal air pressure state detection unit includes: a first overlap degree detection subunit, which is used to detect the overlap degree between the first reference line and the first tire pressure detection area; a first abnormal air pressure state detection subunit, which is used to determine that the target tire is in a first abnormal air pressure state when the first reference line and the first tire pressure detection area overlap unilaterally; a second abnormal air pressure state detection subunit, which is used to determine that the target tire is in a second abnormal air pressure state when the first reference line and the first tire pressure detection area overlap bilaterally.

[0104] In an optional embodiment of the present invention, the device further includes: a second reference line extraction module, which is used to perform edge detection on the target tire image, extract the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame, and extract the second reference line where the outer side of the target tire contacts the ground; the tire pressure detection reference area construction module 540, which also includes: a second tire pressure detection reference area construction unit, which is used to sequentially connect the second reference line, the maximum deformation point, the first spoke reference point, and the second spoke reference point to obtain a second tire pressure detection reference area; the tire pressure detection reference area construction unit, which is used to According to the first tire pressure detection reference area and the second tire pressure detection reference area, a tire pressure detection reference area of ​​the target tire is constructed; accordingly, the abnormal air pressure state detection unit also includes: a second overlap degree detection subunit, used to detect the overlap degree of the first reference line and the second tire pressure detection area; a third abnormal air pressure state detection subunit, used to determine that the target tire is in a third abnormal air pressure state when the first reference line and the second tire pressure detection area overlap on one side; a fourth abnormal air pressure state detection subunit, used to determine that the target tire is in a fourth abnormal air pressure state when the first reference line and the second tire pressure detection area overlap on both sides.

[0105] In an optional embodiment of the present invention, the first reference line extraction module 520 includes: a second reference line extraction unit, used to perform edge detection on the target tire image and extract a second reference line where the outer side of the target tire contacts the ground; and a maximum deformation point detection unit, used to determine the midpoint of the second reference line as the maximum deformation point where the outer side of the target tire contacts the ground.

[0106] In an optional embodiment of the present invention, the first reference line is parallel to the ground.

[0107] The tire pressure detection device provided in the embodiment of the present invention can execute the tire pressure detection method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0108] In the technical solution of the embodiment of the present invention, the acquisition, storage and application of the target tire image of the target tire and the spoke end points on both sides of the nearest spoke end point corresponding to the minimum reference distance value, etc., all comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0109] Embodiment 4

[0110] Figure 6 A schematic diagram of the structure of an electronic device 600 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0111] like Figure 6 As shown, the electronic device 600 includes at least one processor 601, and a memory connected to the at least one processor 601, such as a read-only memory (ROM) 602, a random access memory (RAM) 603, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 601 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 602 or the computer program loaded from the storage unit 608 to the random access memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the electronic device 600 can also be stored. The processor 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0112] Multiple components in the electronic device 600 are connected to the I / O interface 605, including: an input unit 606, such as a keyboard, a mouse, etc.; an output unit 607, such as various types of displays, speakers, etc.; a storage unit 608, such as a disk, an optical disk, etc.; and a communication unit 609, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 609 allows the electronic device 600 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0113] The processor 601 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 601 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 601 executes the various methods and processes described above, such as a tire pressure detection method.

[0114] In some embodiments, the tire pressure detection method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 608. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 600 via the ROM 602 and / or the communication unit 609. When the computer program is loaded into the RAM 603 and executed by the processor 601, one or more steps of the tire pressure detection method described above may be performed. Alternatively, in other embodiments, the processor 601 may be configured to perform the tire pressure detection method in any other appropriate manner (e.g., by means of firmware).

[0115] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0116] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0117] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0118] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0119] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0120] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS (Virtual Private Server) services.

[0121] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0122] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tire pressure detection method, It is characterized in that The method comprises: Acquire a target tire image of a target tire; Performing edge detection on the target tire image to extract the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame; Detecting the reference distance between the spoke end point and the maximum deformation point, and obtaining the spoke end points on both sides of the nearest spoke end point corresponding to the minimum value of the reference distance, to obtain a first spoke reference point and a second spoke reference point; constructing a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point; An overlap between the first reference line and the tire pressure detection reference area is detected to determine the tire pressure state of the target tire.

2. The method according to claim 1, It is characterized in that The detecting an overlap between the first reference line and the tire pressure detection reference area to determine the tire pressure state of the target tire includes: detecting an overlapping state between the first reference line and the tire pressure detection area; When the overlapping state is that there is an overlap, determining that the target tire is in an abnormal air pressure state; When the overlapping state is that there is no overlap, it is determined that the target tire is in a normal air pressure state.

3. The method according to claim 2, It is characterized in that The step of constructing a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point includes: sequentially connecting the maximum deformation point, the first spoke reference point, and the second spoke reference point to construct a first tire pressure detection reference area of ​​the target tire; Accordingly, determining that the target tire is in an abnormal air pressure state includes: detecting an overlap degree between the first reference line and the first tire pressure detection area; When the first reference line and the first tire pressure detection area overlap unilaterally, determining that the target tire is in a first abnormal air pressure state; When the first reference line and the first tire pressure detection area overlap on both sides, it is determined that the target tire is in a second abnormal air pressure state.

4. The method according to claim 3, It is characterized in that While edge detection is performed on the target tire image to extract the maximum deformation point where the outer side of the target tire contacts the ground and the first reference line where the inner side of the target tire contacts the spoke frame, the method further includes: Extracting a second reference line where the outer side of the target tire contacts the ground; The step of constructing a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point further includes: sequentially connecting the second reference line, the maximum deformation point, the first spoke reference point, and the second spoke reference point to obtain a second tire pressure detection reference area; constructing a tire pressure detection reference area of ​​the target tire according to the first tire pressure detection reference area and the second tire pressure detection reference area; Accordingly, the step of determining that the target tire is in an abnormal air pressure state further includes: detecting an overlap degree between the first reference line and the second tire pressure detection area; When the first reference line and the second tire pressure detection area overlap unilaterally, determining that the target tire is in a third abnormal air pressure state; When the first reference line and the second tire pressure detection area overlap on both sides, it is determined that the target tire is in a fourth abnormal air pressure state.

5. The method according to claim 1, It is characterized in that The detecting the target tire image and extracting the maximum deformation point where the outer side of the target tire contacts the ground comprises: Performing edge detection on the target tire image to extract a second reference line where the outer side of the target tire contacts the ground; The midpoint of the second reference line is determined as the point of maximum deformation of the outer side of the target tire in contact with the ground.

6. The method according to claim 1, It is characterized in that The first reference line is parallel to the ground.

7. A tire pressure detection device, It is characterized in that The device comprises: A target tire image acquisition module, used to acquire a target tire image of a target tire; A first reference line extraction module is used to perform edge detection on the target tire image, extract the maximum deformation point where the outer side of the target tire contacts the ground, and the first reference line where the inner side of the target tire contacts the spoke frame; A spoke reference point detection module, used to detect the reference distance between the spoke end point and the maximum deformation point, and obtain the spoke end points on both sides of the nearest spoke end point corresponding to the minimum value of the reference distance, to obtain a first spoke reference point and a second spoke reference point; a tire pressure detection reference area construction module, configured to construct a tire pressure detection reference area of ​​the target tire according to the maximum deformation point, the first spoke reference point, and the second spoke reference point; The tire pressure status detection module is used to detect the overlap between the first reference line and the tire pressure detection reference area to determine the tire pressure status of the target tire.

8. An electronic device, It is characterized in that The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the tire pressure detection method according to any one of claims 1 to 6.

9. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the tire pressure detection method according to any one of claims 1 to 6 when executed.

10. A computer program product, It is characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the computer program implements the tire pressure detection method according to any one of claims 1 to 6.

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