Tire tread measurement system and measurement method

Abstract

The present application discloses a tire tread measurement system and measurement method. The tire tread measurement system comprises: a handheld housing; a measurement housing, connected to the handheld housing, the length direction of the measurement housing being spaced apart relative to the length direction of the handheld housing; a positioning assembly, comprising a fixing plate, the fixing plate being connected to the end portion of the measurement housing, and the length direction of the fixing plate being perpendicular to the length direction of the measurement housing; and a measuring unit, arranged at the end of the measurement housing distant from the fixing plate, wherein the measuring unit comprises a laser emitter and an image collector; the laser emitter is used for emitting laser rays perpendicular to the length direction of the measurement housing; and the image collector is used for capturing laser ray images formed by the laser rays on multiple tire treads. The present application achieves simultaneous measurement of depths of multiple tire tread grooves, greatly improving the measurement efficiency.

Description

Tire tread detection system and detection method

[0001] This application is based on the Chinese patent application with application number 202311599274.2 and application date November 28, 2023, and claims its priority. The entire content of the application is hereby introduced as a whole into this application. Technical Field

[0002] The present application relates to the technical field of tire tread detection, and more specifically to a tire tread detection system and method. Background Art

[0003] The tire tread detection system is a system used to detect the wear of the tire surface tread. The system can help users detect tire wear in a timely manner, prevent potential safety hazards, and provide relevant maintenance suggestions.

[0004] The existing tire tread detection system can only measure the depth of one tire tread groove at a time, resulting in low detection efficiency. Application Contents

[0005] The purpose of this application is to overcome the shortcomings of the existing technology and provide a tire tread detection system and detection method, aiming to achieve the ability to measure the depth of multiple tire tread grooves in a single time to improve detection efficiency.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In one aspect, the present application provides a tire tread detection system, comprising:

[0008] Handheld housing;

[0009] A detection housing is connected to the handheld housing, and the length direction of the detection housing is spaced relative to the length direction of the handheld housing;

[0010] A positioning assembly, comprising a fixing plate, wherein the fixing plate is connected to an end of the detection housing and a length direction of the fixing plate is perpendicular to a length direction of the detection housing;

[0011] A measuring unit is provided at an end of the detection housing away from the fixing plate;

[0012] The measuring unit includes a laser emitter and an image collector. The laser emitter is used to emit a laser line perpendicular to the length direction of the detection shell, and the image collector is used to capture the laser line image formed by the laser line on multiple treads of the tire.

[0013] A further technical solution is that the length direction of the laser line is parallel to the length direction of the fixing plate.

[0014] Its further technical solution is: the detection shell includes a straight shell portion, and a side shell portion extending laterally along one end of the straight shell portion away from the fixed plate, the extension direction of the side shell portion is perpendicular to the length direction of the fixed plate, and the laser emitter and the image collector are installed on the side shell portion.

[0015] A further technical solution is: the laser emitter and the image collector are arranged side by side along the extension direction of the side shell portion, the image collector is arranged close to the side of the straight shell portion, and the laser emitter is arranged away from the side of the straight shell portion.

[0016] A further technical solution is as follows: the handheld housing includes a handheld portion, and a transition portion arranged at an angle to the handheld portion, and the detection housing is connected to the transition portion at an angle.

[0017] A further technical solution is as follows: the adapter portion is provided with a sleeve, and an end of the detection housing close to the fixing plate is provided with a connecting column, and the connecting column is clamped in the sleeve.

[0018] Its further technical solution is: the fixing plate includes a first abutting portion, the first abutting portion abuts against one side of the outside of the tread groove to be tested, a second abutting portion, the second abutting portion abuts against the other side of the outside of the tread groove to be tested, and a connecting portion that fixes the first abutting portion and the second abutting portion, and the connecting portion corresponds to the position of the tread groove to be tested.

[0019] A further technical solution is: the first abutting portion and / or the second abutting portion is provided with a receiving groove, and a magnetic element is provided in the receiving groove.

[0020] A further technical solution is as follows: the positioning assembly further includes a connecting rod, one end of the connecting rod is connected to the fixing plate, and the other end of the connecting rod is connected to the detection housing.

[0021] On the other hand, the present application also provides a detection method of the above-mentioned tire tread detection system, comprising:

[0022] Place the fixing plate against the tread surface of the tire to be tested;

[0023] Use a laser transmitter to emit a laser line perpendicular to the length direction of the detection shell toward the tread surface of the tire to be tested;

[0024] Using an image collector to capture laser line images formed by the laser line on multiple tread patterns of the tire;

[0025] The tread groove depth of the tire to be tested is analyzed based on the captured laser line image.

[0026] Compared with the prior art, the present application has the following advantages: a tire tread detection system comprises: a handheld housing; a detection housing connected to the handheld housing, the detection housing being spaced apart from the handheld housing in its longitudinal direction; a positioning assembly comprising a fixing plate connected to an end of the detection housing, the fixing plate being perpendicular to the longitudinal direction of the detection housing; and a measuring unit disposed at an end of the detection housing away from the fixing plate; wherein the measuring unit comprises a laser emitter and an image collector, the laser emitter being configured to emit a laser line perpendicular to the longitudinal direction of the detection housing, and the image collector being configured to capture a laser line image formed by the laser line on multiple tire treads. By arranging the laser emitter and the image collector at the end away from the fixing plate, with the laser line emitted by the laser emitter perpendicular to the longitudinal direction of the detection housing, the laser line can always cover multiple tire treads, and the laser line image can be captured by the image collector, thereby achieving simultaneous measurement of the groove depths of multiple tire treads, greatly improving detection efficiency.

[0027] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] FIG1 is a schematic structural diagram of a tire tread detection system provided in a specific embodiment of the present application;

[0030] FIG2 is an exploded view of a tire tread detection system provided in a specific embodiment of the present application;

[0031] FIG3 is a schematic structural diagram of a handheld housing and a detection housing in a tire tread detection system provided by a specific embodiment of the present application;

[0032] FIG4 is an exploded view of a handheld housing and a detection housing in a tire tread detection system provided in a specific embodiment of the present application;

[0033] FIG5 is a schematic structural diagram of a detection housing in a tire tread detection system according to a specific embodiment of the present application;

[0034] FIG6 is a schematic structural diagram of a positioning component in a tire tread detection system according to a specific embodiment of the present application;

[0035] FIG7 is an exploded view of a positioning component in a tire tread detection system provided in a specific embodiment of the present application;

[0036] FIG8 is a schematic structural diagram of a fixed plate in a tire tread detection system according to a specific embodiment of the present application;

[0037] FIG9 is a structural diagram of a fixed plate in a tire tread detection system according to a specific embodiment of the present application from another perspective;

[0038] FIG10 is a schematic diagram of the optical path structure of a tire tread detection system according to a specific embodiment of the present application;

[0039] FIG11 is a second schematic diagram of the optical path structure of the tire tread detection system provided in a specific embodiment of the present application. Reference numerals

[0040] 1. Handheld housing; 11. Handheld portion; 12. Adapter portion; 121. Sleeve; 1211. Clamping protrusion; 2. Detection housing; 21. Straight housing portion; 211. Hole; 2111. Clamping block; 22. Side housing portion; 3. Positioning assembly; 31. Fixing plate; 311. First abutting portion; 3111. First abutting surface; 312. Second abutting portion; 3121. Second abutting surface; 313. Connecting portion; 3131. Fixing groove; 31311. First threaded hole; 31312. Positioning protrusion; 314. Accommodating groove; 32. Connecting rod; 321. First positioning hole; 322. Annular flange; 33. Magnetic element; 34. Cover plate; 35. Rotating ring; 351. Annular limiting portion; 352, anti-slip stripes; 4, measuring unit; 41, laser emitter; 42, image collector; 43, laser emitter lens; 44, image collector lens; 5, connecting column; 51, first embedded section; 511, concave surface of the first embedded section; 512, convex surface of the first embedded section; 513, window; 514, slot; 52, second embedded section; 521, incision; 53, limiting step; 54, pass-through portion; 541, second positioning hole; 6, battery; 7, control board; 8, display screen; 9, power switch; 100, laser line; 200, left endpoint of the laser line; 300, right endpoint of the laser line; 400, shooting angle range of the image collector. DETAILED DESCRIPTION

[0041] The following will be combined with the specific embodiments of this application to clearly and completely describe the technical solutions of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] It should be understood that when used in this specification and claims, the terms "include" and "comprising" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0043] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0044] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0045] As shown in Figures 1 and 2, an embodiment of the present application provides a tire tread detection system, comprising a handheld housing 1, a detection housing 2, a positioning assembly 3, and a measuring unit 4. The detection housing 2 is connected to the handheld housing 1, and the length direction of the detection housing 2 is spaced relative to the length direction of the handheld housing 1. The positioning assembly 3 includes a fixing plate 31, which is connected to the end of the detection housing 2 and the length direction of the fixing plate 31 is perpendicular to the length direction of the detection housing 2. The measuring unit 4 is disposed at the end of the detection housing 2 away from the fixing plate 31; the measuring unit 4 includes a laser emitter 41 and an image collector 42. The laser emitter 41 is used to emit a laser line 100 perpendicular to the length direction of the detection housing 2, and the image collector 42 is used to capture the laser line image formed by the laser line 100 on multiple treads of the tire. The image collector 42 is a camera.

[0046] By arranging the laser emitter 41 and the image collector 42 at one end away from the fixed plate 31, and the laser line 100 emitted by the laser emitter 41 is perpendicular to the length direction of the detection shell 2, the laser line 100 can always cover multiple treads of the tire, and the laser line image can be captured by the image collector 42, thereby realizing the simultaneous measurement of the depths of multiple tread grooves, greatly improving the detection efficiency.

[0047] In order to more clearly understand why the present application can simultaneously measure the depth of multiple tread grooves, as shown in Figure 10, in actual use, the fixing plate 31 abuts against the tire tread surface, and the laser emitter 41 emits a laser line 100 in a direction perpendicular to the length of the detection shell 2. The length of the laser line 100 tends to gradually increase from near to far. When the laser line 100 reaches the tire tread surface, the laser line between the left endpoint 200 of the laser line and the right endpoint 300 of the laser line is parallel to the width direction of the tire, so that the laser line 100 can always cover multiple tire treads. As shown in FIG11 , the image acquisition device's shooting angle range 400 illustrated in FIG11 indicates that the image acquisition device 42 is fully capable of capturing laser line images formed on multiple tire treads. The tire tread groove depth can then be analyzed based on the laser line images. Specifically, the analysis method may include first preprocessing the laser line images, such as by denoising and contrast enhancement, to improve the accuracy of subsequent image analysis. Image processing techniques are then used to segment and extract the laser line 100 from the tire tread, forming a binary image of the tread. The tread groove depth can then be calculated by analyzing the morphological information of the tread in the binary image. Common methods include contour analysis, edge detection, and morphological operations. It should be noted that once the image acquisition device 42 captures the laser line images formed on multiple tire treads, the tire tread groove depth can be determined using common analysis methods in the prior art. This application does not limit the analysis methods.

[0048] As shown in Figure 10, the length direction of the laser line 100 is parallel to the length direction of the fixing plate 31. This design allows the laser line 100 emitted by the laser emitter 41 to avoid the fixing plate 31, preventing the fixing plate 31 from blocking the laser line 100.

[0049] As shown in Figures 1 to 4, the detection shell 2 includes a straight shell portion 21 and a side shell portion 22 extending laterally along one end of the straight shell portion 21 away from the fixed plate 31. The extension direction of the side shell portion 22 is perpendicular to the length direction of the fixed plate 31, and the laser emitter 41 and the image collector 42 are installed on the side shell portion 22.

[0050] Specifically, an installation cavity is formed inside the side shell portion 22, and a bracket is fixed in the installation cavity. The laser emitter 41 and the image collector 42 are fixedly installed on the side shell portion 22 by using the bracket. Since the side shell portion 22 is arranged on the side of the straight shell portion 21, it is possible to avoid interference with the laser line 100 emitted by the laser emitter 41 due to obstruction by the straight shell portion 21, and to avoid interference with the image collector 42 in normally capturing the laser line image due to obstruction by the straight shell portion 21.

[0051] As shown in Figure 2, in one embodiment, a laser emitter lens 43 corresponding to the laser emitter 41 and an image collector lens 44 corresponding to the image collector 42 are provided on the side shell portion 22. The laser emitter lens 43 is used to adjust the emission direction of the laser line 100, and the image collector lens 44 is used to adjust the image acquisition range of the image collector 42.

[0052] As shown in Figure 4 , the laser emitter 41 and the image collector 42 are arranged side by side along the extension direction of the side shell portion 22, with the image collector 42 positioned closer to the straight shell portion 21 and the laser emitter 41 positioned further away from the straight shell portion 21. This design facilitates the emission of the laser line 100 by the laser emitter 41 and the capture of the laser line image by the image collector 42. Of course, in other embodiments, the laser emitter 41 may be positioned closer to the straight shell portion 21 and the image collector 42 further away from the straight shell portion 21.

[0053] As shown in FIG2 , in one embodiment, the measurement unit 4 further includes a control board 7 electrically connected to the laser emitter 41 and the image collector 42. The control board 7 is disposed within the handheld housing 1 and is used to control the laser emitter 41 and analyze the laser line image captured by the image collector 42. The control board 7 is electrically connected to the laser emitter 41 and the image collector 42 via wires. This reduces the number of electronic components in the detection housing 2 and reduces the size of the detection housing 2, thereby making the detection housing 2 even smaller.

[0054] As shown in FIG2 , in one embodiment, the measurement unit 4 further includes a display screen 8 and a battery 6 electrically connected to the control board 7. The display screen 8 is disposed on the surface of the handheld housing 1, and the battery 6 is housed within the handheld housing 1. The display screen 8 is used to display detection information. Preferably, the display screen 8 is disposed on the surface of the handheld housing 1 facing away from the detection housing 2, thereby making it easier for the tester to view the detection information. Preferably, housing the battery 6 within the handheld housing 1 further reduces the size of the detection housing 2.

[0055] As shown in Figure 2, in one embodiment, the measurement unit 4 further includes a power switch 9 electrically connected to the control panel 7. The power switch 9 is located on the surface of the handheld housing 1 facing away from the detection housing 2, i.e., on the same surface as the display screen 8, to facilitate operation by the inspector. When the power switch 9 is turned on, the laser emitter 41 and the image collector 42 enter an operational state. The laser emitter 41 emits a laser line 100, which strikes the tire surface to form a laser line image, and the image collector 42 captures the laser line image.

[0056] As shown in Figure 4, the handheld housing 1 includes a handheld portion 11 and an adapter portion 12 arranged at an angle to the handheld portion 11, and the detection housing 2 is connected at an angle to the adapter portion 12. Since the handheld portion 11 and the adapter portion 12 of the handheld housing 1 are arranged at an angle, and the adapter portion 12 is connected at an angle to the detection housing 2, in this embodiment, the angle between the handheld portion 11 and the adapter portion 12 is 90°, and the angle between the adapter portion 12 and the detection housing 2 is also 90°. This is equivalent to the handheld housing 1 and the detection housing 2 being connected. The overall structure is a two-stage structure. The length of the detection housing 2 is relatively short. The tire tread detection system can extend into the gap between the vehicle bumper and the ground at a small angle to the ground to complete the detection of the tread groove depth. Therefore, it can be used in application scenarios with a low vehicle chassis, thereby improving the applicability of the tire tread detection system.

[0057] The handheld shell 1 and the detection shell 2 are connected to form a roughly U-shaped structure. When in use, the measurement personnel holds the handheld part 11, and the detection shell 2 is located on the side of the measurement personnel's hand. It can be extended into the gap between the vehicle bumper and the ground at a small angle to the ground, and it is convenient for the detection personnel to apply force to the detection shell 2, thereby improving the stability of the fixing plate 31 against the tire tread surface and avoiding the problem of tilting of the fixing plate 31.

[0058] Preferably, the handle portion 11 and the adapter portion 12 are an integrally formed structure, which is convenient for manufacturing and processing.

[0059] Preferably, the length direction of the handheld portion 11 is parallel to the length direction of the detection shell 2. This design allows, when the inspector holds the handheld portion 11 and applies a force to the handheld portion 11 parallel to the length direction of the handheld portion 11, the force is transmitted from the handheld portion 11 to the detection shell 2 and then to the fixed plate 31. This not only makes it easier for the inspector to determine the direction of his or her own force, reduces the possibility of the fixed plate 31 tilting during tire tread testing, and improves the accuracy of the test, but also is applicable to vehicles with a smaller gap between the vehicle bumper and the ground, that is, vehicles with a lower vehicle chassis. It should be noted that the length direction of the handheld portion 11 and the length direction of the detection shell 2 can be arranged at a certain angle, for example, the angle between the length direction of the handheld portion 11 and the length direction of the detection shell 2 is 15 degrees, 25 degrees, etc.

[0060] As shown in Figures 3 and 4, the adapter 12 is provided with a sleeve 121, and the end of the detection housing 2 near the fixing plate 31 is provided with a connecting post 5, which is snap-fitted into the sleeve 121. The snap-fitting method prevents relative movement between the detection housing 2 and the handheld housing 1, ensuring the stability of the connection.

[0061] As shown in Figures 2 to 5, the connecting column 5 includes a first embedded section 51 and a second embedded section 52. A limiting step 53 is formed between the first embedded section 51 and the second embedded section 52. The first embedded section 51 is clamped in the sleeve 121, and the rear end face of the sleeve 121 and the limiting step 53 constitute a limit for the installation direction of the connecting column 5. The second embedded section 52 is clamped in the sleeve hole 211 provided in the straight shell part 21, and the front end face of the sleeve hole 211 and the limiting step 53 constitute a limit for the installation direction of the detection shell 2.

[0062] During installation, the front end of the first embedded section 51 of the connecting column 5 is first inserted from the rear end of the sleeve 121. When the limiting step 53 of the connecting column 5 is inserted and abuts against the rear end face of the sleeve 121, the installation direction limit between the connecting column 5 and the handheld shell 1 is formed. Then the rear end of the second embedded section 52 of the connecting column 5 is inserted from the front end of the sleeve hole 211. When the limiting step 53 of the connecting column 5 is inserted and abuts against the front end face of the sleeve hole 211, the installation direction limit between the connecting column 5 and the detection shell 2 is formed. At the same time, the first embedded section 51 and the sleeve 121, as well as the second embedded section 52 and the sleeve hole 211 are connected by snapping, which prevents the handheld shell 1 and the detection shell 2 from rotating in the circumferential direction relative to the connecting column 5, thereby avoiding the problem of relative movement between the handheld shell 1 and the detection shell 2 during use.

[0063] As shown in FIG4 , at least a portion of the inner wall of the sleeve 121 is concave and at least a portion is convex. At least a portion of the outer surface of the first embedded section 51 is concave and at least a portion is convex. When the first embedded section 51 is installed in the sleeve 121, the concave surface 511 of the first embedded section corresponds to the convex surface of the sleeve 121, and the convex surface 512 of the first embedded section corresponds to the concave surface of the tube. Such a design can prevent circumferential rotation between the handheld shell 1 and the connecting column 5. It should be noted that the number of concave and convex surfaces designed for the sleeve 121 and the first embedded section 51 can be determined according to actual needs. In this embodiment, the inner wall of the sleeve 121 has two convex surfaces, which are arranged opposite to each other, and the rest are concave surfaces. The outer surface of the first embedded section 51 has two concave surfaces, which are arranged opposite to each other.

[0064] As shown in Figure 4, the outer surface of the first embedded section 51 is provided with at least one engaging groove 514, and the sleeve 121 is provided with a snap-fitting protrusion 1211 that engages with the engaging groove 514. This design further prevents circumferential rotation between the handheld housing 1 and the connecting column 5. Furthermore, the interference fit between the snap-fitting protrusion 1211 and the engaging groove 514 enhances the stability of the connection and prevents loosening. In this embodiment, the outer surface of the first embedded section 51 is provided with two opposing engaging grooves 514, and the sleeve 121 is provided with two opposing engaging protrusions 1211 that engage with the two engaging grooves 514. Of course, in other embodiments, the number of snap-fitting protrusions 1211 and engaging grooves 514 can be adjusted adaptively.

[0065] As shown in Figure 4, the opening direction of the slot 514 is the same as the installation direction of the first embedded section 51. This design allows the engaging protrusion 1211 to be directly inserted into the slot 514 along the installation direction of the first embedded section 51 of the connecting column 5 during installation, making installation more convenient.

[0066] As shown in Figure 4 , the outer surface of the second embedded section 52 is provided with at least one notch 521, and the sleeve hole 211 is provided with a latch 2111 at a position corresponding to the notch 521. When the second embedded section 52 is installed in the sleeve hole 211, the latch 2111 abuts between the notch 521 and the inner wall of the sleeve hole 211. This design not only prevents relative circumferential rotation between the connecting column 5 and the detection housing 2, but also provides a certain preload force between the two. Furthermore, after the second embedded section 52 is installed in the sleeve hole 211, it is locked in the sleeve hole 211 using fasteners such as screws.

[0067] In some embodiments, the block 2111 may be configured to be inclined to facilitate insertion and form a pre-tightening force after installation.

[0068] In this embodiment, the cutout 521 is arranged at one end of the second embedded section 52 away from the first embedded section 51 . The second embedded section 52 is relatively provided with two cutouts 521 , which can improve the stability after connection.

[0069] As shown in Figure 4 , in one embodiment, the first embedded section 51 and the second embedded section 52 are each provided with a central through-hole (not shown) that communicates with each other. A window 513 is provided on one side of the first embedded section 51, and a via is provided on the sleeve 121 corresponding to the position of the window 513. The via, the window 513, and the central through-holes of the first and second embedded sections 51 and 52 form a wiring channel. This design rationally utilizes space and achieves concealed wiring between the handheld housing 1 and the detection housing 2.

[0070] As shown in FIG. 2 and FIG. 6 - FIG. 7 , the positioning assembly 3 further includes a connecting rod 32 , one end of the connecting rod 32 is connected to the fixing plate 31 , and the other end of the connecting rod 32 is connected to the detection housing 2 .

[0071] Specifically, the end surface of the other end of the connecting rod 32 is provided with at least two first positioning holes 321. The first embedded section 51 extends away from the end of the second embedded section 52 to form a protrusion 54. The end surface of the protrusion 54 is provided with at least two second positioning holes 541. Positioning pins are inserted into the corresponding first positioning holes 321 and second positioning holes 541. The first positioning holes 321 and the second positioning holes 541 can be circular or square in shape. Correspondingly, the shape of the positioning pins should be compatible with the shapes of the first positioning holes 321 and the second positioning holes 541. It should be understood that the sum of the depths of the first positioning holes 321 and the second positioning holes 541 should be less than or equal to the length of the positioning pin. In this embodiment, the first positioning holes 321 and the second positioning holes 541 are circular, and the sum of their depths is equal to the length of the positioning pin.

[0072] By providing at least two first positioning holes 321 in the connecting rod 32 and at least two second positioning holes 541 in the through-hole 54, and using positioning pins to engage with the first positioning holes 321 and the second positioning holes 541, the stability of the connection between the connecting rod 32 and the detection housing 2 can be ensured, and loosening of the connection can be avoided.

[0073] As shown in FIG4 , in this embodiment, the connecting rod 32 is provided with two first positioning holes 321, and the through-hole 54 is also provided with two positioning holes. Two positioning pins are inserted into the two first positioning holes 321 and the two second positioning holes 541 arranged opposite to each other, and the two first positioning holes 321 are arranged symmetrically relative to the center of the connecting rod 32, and the two second positioning holes 541 are arranged symmetrically relative to the center of the connecting column 5. The advantage of this design is that it can ensure the positioning and matching of the connecting rod 32 and the through-hole 54 while minimizing the use of positioning pins, and at the same time, it can prevent the connecting rod 32 from rotating in the circumferential direction relative to the detection housing 2. Of course, in other embodiments, three or more first positioning holes 321 and a corresponding number of second positioning holes 541 can be provided, and a corresponding number of positioning pins can be used for positioning and matching.

[0074] In one embodiment, a rotating ring 35 is movably mounted on the connecting rod 32. The inner wall of the rotating ring 35 is provided with an internal thread (not shown). The outer surface of the protruding portion 54 is provided with an external thread (not shown) that mates with the internal thread. This threaded connection facilitates assembly and disassembly of the connecting rod 32 and the detection housing 2, while also enhancing the stability of the connection and preventing loosening.

[0075] As shown in Figures 6 and 7, an annular flange portion 322 is radially extended outward from the outer surface of the end of the connecting rod 32 away from the fixed plate 31. An annular stop portion 351 is extended toward the center of the inner annular wall of the rotating ring 35 and abuts against the annular flange portion 322. The annular flange portion 322 and the annular stop portion 351 prevent the rotating ring 35 from detaching from the end of the connecting rod 32 away from the fixed plate 31, thus providing a mutual restraining effect.

[0076] As shown in FIG7 , the outer wall surface of the rotating ring 35 is provided with anti-slip stripes 352 to increase the friction during rotation, thereby making it easier to rotate the rotating ring 35 and more convenient for users to operate.

[0077] As shown in Figures 6-9, the fixing plate 31 includes a first abutting portion 311, which abuts against one side of the outside of the tread groove to be measured, a second abutting portion 312, which abuts against the other side of the outside of the tread groove to be measured, and a connecting portion 313 that fixes the first abutting portion 311 and the second abutting portion 312. The first abutting portion 311, the second abutting portion 312, and the connecting portion 313 can be an integrated structure or a separate structure. The connecting portion 313 corresponds to the position of the tread groove to be measured, that is, when in the measurement state, the fixing plate 31 spans the tread groove to be measured.

[0078] Furthermore, the first abutting portion 311 and / or the second abutting portion 312 are provided with a receiving groove 314, in which a magnetic element 33 is disposed. The magnetic element 33 may be a magnet, etc. As shown in FIG9 , in this embodiment, circular receiving grooves 314 are provided on the upper surfaces of both the first abutting portion 311 and the second abutting portion 312, each containing a circular magnetic element 33. This design enhances the magnetic properties of the fixing plate 31 within a limited space, thereby improving contact stability during measurement or calibration. It is understood that in other embodiments, the receiving grooves 314 may be provided on the lower surfaces of the first abutting portion 311 and the second abutting portion 312 (i.e., the surfaces that abut the tire to be measured), or on the side surfaces of the first abutting portion 311 and the second abutting portion 312.

[0079] By arranging a magnetic element 33 on the fixing plate 31, during measurement, after the fixing plate 31 contacts the tire, due to the metal parts inside the tire, the fixing plate 31 and the tire play a pre-fixing role, thereby ensuring the stability of the fixing plate 31 during measurement. In addition, during calibration, since the calibration device is provided with a magnetic suction part, the magnetic attraction force of the magnetic element 33 makes the fixing plate 31 and the calibration device stably connected, and no human deviation will occur during the calibration process, and the operation is more labor-saving.

[0080] In order to prevent the magnetic element 33 from easily falling off from the receiving groove 314 , preferably, the magnetic element 33 is bonded and fixed in the receiving groove 314 using an adhesive such as glue.

[0081] In one embodiment, as shown in Figures 2 and 9 , a cover plate 34 is further provided in the receiving groove 314, covering the top of the magnetic element 33. The cover plate 34 conforms to the shape of the receiving groove 314 and can be made of either a flexible or rigid material, such as rubber or acrylic. To prevent it from falling off, the cover plate 34 is fixed to the receiving groove 314 using glue or other adhesive. For aesthetic reasons, once the cover plate 34 is installed, its upper surface is flush with the upper surface of the fixing plate 31.

[0082] As shown in Figures 7-9, the surface of the first abutting portion 311 that abuts one side of the exterior of the tread groove to be tested is a first abutting surface 3111, and the surface of the second abutting portion 312 that abuts the other side of the exterior of the tread groove to be tested is a second abutting surface 3121. Both the first abutting surface 3111 and the second abutting surface 3121 are flat surfaces. The surface of the connecting portion 313 that is on the same side as the first abutting surface 3111 and the second abutting surface 3121 is a concave surface that is concave inwardly facing away from the tread groove to be tested. During measurement, the inner concave surface can avoid the concave and convex parts of the tire tread surface. At the same time, the first abutting surface 3111 and the second abutting surface 3121 can tightly abut the surfaces on both sides of the tread groove to be measured in the tire. This design can increase the contact area with the tire tread surface, reduce the influence of the concave and convex parts of the tire tread surface on the fixing plate 31, and ensure that the fixing plate 31 is in close contact with the tire tread surface, reduce the possibility of the fixing plate 31 tilting, and improve the contact stability during measurement.

[0083] As shown in Figures 7-9, a fixing groove 3131 is provided on the side of the connecting portion 313 facing away from the tread groove to be tested. The end of the connecting rod 32 closest to the fixing plate 31 is embedded in and fixed to the fixing groove 3131. A first threaded hole 31311 is defined within the fixing groove 3131, and a second threaded hole is defined on the end surface of the connecting rod 32 closest to the fixing plate 31. The connecting rod 32 and the fixing plate 31 are secured together by a fastener connected to the first threaded hole 31311 and the second threaded hole (not shown). The fastener has at least a threaded portion and can be a conventional screw or bolt. This design facilitates assembly and disassembly and provides excellent stability after connection.

[0084] In order to prevent the tightening end of the fastener from protruding from the inner concave surface after tightening, thereby affecting the normal use of the fixing plate 31, a step portion is provided in the first threaded hole 31311, which divides the first threaded hole 31311 into an inner hole portion and an outer hole portion. After the fastener is tightened, the tightening end of the fastener will be located in the outer hole portion.

[0085] As shown in Figures 7-9 , the fixing groove 3131 is further provided with at least two positioning protrusions 31312. The end surface of the connecting rod 32 near the fixing plate 31 is also provided with a positioning hole (not shown) that mates with the positioning protrusions 31312. This design prevents relative circumferential movement between the fixing plate 31 and the connecting rod 32 after connection, thereby further enhancing the stability of the connection. It is understood that the number of positioning protrusions 31312 can be selected based on practical needs, for example, three or four can be provided. Of course, the number of positioning holes should match the number of positioning protrusions 31312.

[0086] The present application also provides a tire tread detection method based on the above tire tread detection system, the method comprising the following steps:

[0087] S10: placing the fixing plate against the tread surface of the tire to be tested.

[0088] S20, using a laser transmitter to emit a laser line perpendicular to the length direction of the detection housing toward the tread surface of the tire to be tested.

[0089] S30: Using an image collector to capture laser line images formed by the laser lines on the plurality of tread patterns of the tire.

[0090] S40: Analyze the tread groove depth of the tire to be measured according to the captured laser line image.

[0091] This detection method allows for simultaneous groove depth testing of multiple tire treads, significantly improving detection efficiency. Furthermore, because the handheld housing and detection housing are connected as a two-stage structure, the detection housing is relatively short. This allows the tire tread detection system to be inserted into the gap between the vehicle's bumper and the ground at a slight angle to complete the tread groove depth test. This makes it suitable for applications with low vehicle chassis, enhancing the applicability of the tire tread detection system.

[0092] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A tire tread detection system, characterized in that: include: Handheld housing; A detection housing connected to the handheld housing, wherein the length direction of the detection housing is spaced apart from the length direction of the handheld housing; A positioning assembly, comprising a fixing plate, wherein the fixing plate is connected to an end of the detection housing and a length direction of the fixing plate is perpendicular to a length direction of the detection housing; A measuring unit, disposed at one end of the detection housing away from the fixing plate; The measuring unit includes a laser emitter and an image collector, wherein the laser emitter is used to emit a laser line perpendicular to the length direction of the detection shell, and the image collector is used to capture a laser line image formed by the laser line on multiple treads of the tire.

2. The tire tread detection system according to claim 1, characterized in that: The length direction of the laser line is parallel to the length direction of the fixing plate.

3. The tire tread detection system according to claim 1, characterized in that: The detection shell includes a straight shell portion and a side shell portion extending laterally along one end of the straight shell portion away from the fixed plate, the extension direction of the side shell portion is perpendicular to the length direction of the fixed plate, and the laser emitter and the image collector are installed on the side shell portion.

4. The tire tread detection system according to claim 3, characterized in that: The laser emitter and the image collector are arranged side by side along the extension direction of the side shell portion, the image collector is arranged close to one side of the straight shell portion, and the laser emitter is arranged away from one side of the straight shell portion.

5. The tire tread detection system according to claim 1, characterized in that: The handheld housing comprises a handheld portion and a transition portion arranged at an angle to the handheld portion, and the detection housing is connected to the transition portion at an angle.

6. The tire tread detection system according to claim 5, characterized in that: The adapter portion is provided with a sleeve, and one end of the detection housing close to the fixing plate is provided with a connecting column, and the connecting column is clamped in the sleeve.

7. The tire tread detection system according to claim 1, characterized in that: The fixing plate includes a first abutting portion, the first abutting portion abuts against one side of the outside of the tread groove to be measured, a second abutting portion, the second abutting portion abuts against the other side of the outside of the tread groove to be measured, and a connecting portion fixing the first abutting portion and the second abutting portion, the connecting portion corresponding to the position of the tread groove to be measured.

8. The tire tread detection system according to claim 7, characterized in that: The first abutting portion and / or the second abutting portion is provided with a receiving groove, and a magnetic element is provided in the receiving groove.

9. The tire tread detection system according to claim 1, characterized in that: The positioning assembly further comprises a connecting rod, one end of which is connected to the fixing plate, and the other end of which is connected to the detection housing.

10. A detection method, applied to the tire tread detection system according to any one of claims 1 to 9, characterized in that: The detection method comprises: Place the fixing plate against the tread surface of the tire to be tested; Using a laser transmitter to emit a laser line perpendicular to the length direction of the detection shell to the tread surface of the tire to be tested; Using an image collector to capture laser line images formed by laser lines on multiple tread patterns of the tire; The tread groove depth of the tire to be tested is analyzed based on the captured laser line image.

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