Drive-through tread measurement device

Abstract

A drive-through tread measurement device, comprising a left wheel measurement apparatus (1) and a right wheel measurement apparatus (2). The left wheel measurement apparatus (1) comprises a main housing (10), a front slope plate (11) and a rear slope plate (12); the front slope plate (11) and the rear slope plate (12) are respectively fixed at the front end and the rear end of the main housing (10); a pressing trigger mechanism (13) is provided at the junction of the front slope plate (11) and the main housing (10); a tread measurement unit (14) for measuring tread groove depths and a control board (15) are provided in main housing (10); the pressing trigger mechanism (13) is electrically connected to the control board (15); the pressing trigger mechanism (13) is used for sending a starting signal to the control board (15) when the pressing trigger mechanism (13) is pressed by a tire; and the control board (15) is used for controlling, on the basis of the starting signal, the tread measurement unit (14) to measure the tread groove depths of the tire.

Description

A pass-through tire tread detection device Technical Field

[0001] The present invention relates to tire detection equipment, in particular to a through-type tire tread detection equipment. Background Art

[0002] Tire inspection targets include tread groove depth detection. Existing detection methods generally use optical or other detection units to measure tread groove depth. To automatically activate the detection unit, some detection devices are also equipped with an automatic trigger mechanism. For related equipment, please refer to the Chinese patent publication number CN219121328U, entitled "A Vehicle-Triggered Tire Tread Groove Depth Detection Device," which describes:

[0003] "The non-contact trigger assembly 3 includes a light trigger 31 and a housing 32. Two non-contact trigger assemblies 3 are provided on a detection road 1. The two non-contact trigger assemblies 3 are located on both sides of the measurement port 11. When the vehicle 5 approaches the measurement port 11, the trigger light 3111 is blocked by the tire 51. The tread scanner 2 starts to detect the tread groove depth of the tire 51 during the process of the trigger light 3111 being blocked by the tire 51. Otherwise, the tread scanner 2 is in a standby state." and "The mechanical trigger assembly 4 includes a mechanical button 41 and a and proximity trigger 42. A mechanical button 41 is disposed within the inspection road 1, which has a slot 16 for mounting the mechanical button 41. The mechanical button 41 is located on the side of the measuring port 11 near the entrance 13. As the vehicle 5 to be inspected continues to move toward the exit 14, the tire 51 passes over the first mechanical button 412, pressing against the second mechanical button 411. This causes the proximity triggers 42 on either side of the second mechanical button 411 to transmit signals to the tread scanner 2, instructing the scanner 2 to initiate inspection.

[0004] This type of device uses a photosensitive, non-contact trigger component and a mechanical button to detect the wheel's entry status. However, the optical transmitting and receiving surfaces of the photosensitive, non-contact trigger component are easily obstructed by dust and debris, resulting in insensitive triggering. Mechanical buttons require the wheel to press the button simultaneously for detection, placing high demands on the system's detection response speed. If the button is triggered but detection is not initiated promptly, detection will fail, affecting both efficiency and accuracy. Technical issues

[0005] The technical problem to be solved by the present invention is to provide a through-type tire tread detection device with a reasonable structural layout, which can realize reliable triggering and improve detection accuracy and detection efficiency, in response to the shortcomings of the existing technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0007] A pass-through tread detection device includes a left wheel detection device and a right wheel detection device. The left wheel detection device includes a main shell, a front ramp plate and a rear ramp plate. The front ramp plate and the rear ramp plate are respectively fixed to the front and rear ends of the main shell. A press trigger mechanism is provided at the junction of the front ramp plate and the main shell. A tread detection unit and a control board for measuring the tread groove depth are provided in the main shell. The press trigger mechanism is electrically connected to the control board. The press trigger mechanism is used to send a start signal to the control board when it is squeezed by the tire. The control board is used to control the tread detection unit to measure the tire tread groove depth according to the start signal.

[0008] Preferably, a top plate is fixed on the top of the main shell, and a first window and a second window are provided on the top plate in sequence from back to front. The tread detection unit includes a laser emitting unit and a camera unit. The laser beam emitted by the laser emitting unit passes through the first window and is emitted toward the tire, and the camera unit captures the laser line image of the tire surface through the second window.

[0009] Preferably, the laser emitting unit includes a laser emitting device and a laser reflecting mirror, and the laser beam emitted by the laser emitting device is reflected by the laser reflecting mirror and then passes through the first window.

[0010] Preferably, the camera unit includes a camera and a camera reflector, the camera reflector is aligned with the second window, and the laser line image of the tire surface is reflected to the camera through the camera reflector.

[0011] Preferably, the camera unit includes two cameras and two camera reflectors, the two camera reflectors are respectively arranged on the left and right sides of the laser emitting device, and the cameras correspond to the camera reflectors one to one.

[0012] Preferably, the tire tread detection unit includes a base plate and an inner shell, the laser emitting device, the laser reflector, the camera, the camera reflector and the control panel are all arranged on the base plate, the inner shell is fixedly connected to the base plate, and the inner shell cover is arranged above the laser emitting device, the camera, the camera reflector and the control panel.

[0013] Preferably, three through holes are opened on the bottom plate, and three support columns distributed in a "pin" shape are fixed to the bottom of the main shell. The support columns correspond to the through holes one by one, and the support columns abut against the inner wall of the top plate after passing through the through holes.

[0014] Preferably, a mounting groove is fixed on the front end of the main shell, and the press trigger mechanism is fixed in the mounting groove.

[0015] Preferably, the push trigger mechanism includes a fixing plate, the fixing plate includes a plurality of recessed portions, a push switch is fixed in each recessed portion, a push contact is sleeved on the push rod at the upper end of the push switch, a transition plate is formed at the rear end of the front ramp plate, the transition plate is flush with the top plate, and the transition plate is fixedly connected to the front end of the main shell by screws, a plurality of through holes are provided on the transition plate, the push contacts correspond to the through holes one by one, the push contacts pass through the through holes, and the push contacts can move up and down relative to the through holes.

[0016] Preferably, a bent plate is fixed to the rear end of the main shell, the bent plate is located at the upper edge of the main shell, the front end of the rear ramp plate is sleeved on the top of the bent plate, and the rear ramp plate and the bent plate are fixedly connected by screws.

[0017] In the pass-through tread detection device disclosed herein, the left and right wheel detection devices are respectively for the left and right tires to pass through. When the tires travel along the front ramp toward the top of the main housing, the push-trigger mechanism is triggered at the junction of the front ramp and the main housing. The push-trigger mechanism promptly sends a start signal to the control panel, which then controls the tread detection unit to begin detection based on the start signal. When the tires travel to the detection area of ​​the tread detection unit, the tread groove depth is automatically measured during the tire's passage. Compared to the optical triggering method used in the prior art, the present invention is not affected by factors such as dust and debris. Compared to the existing mechanical button triggering method, the present invention triggers the push-trigger mechanism and activates the tread detection unit sequentially, eliminating the need to continuously press the mechanical button during the detection process, thereby avoiding false detections and missed detections. Based on these features, the pass-through tread detection device of the present invention not only has a reasonable structural layout but also achieves reliable triggering, which helps improve the accuracy and efficiency of tread groove depth detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a perspective view of a through-type tire tread detection device according to the present invention;

[0019] Figure 2 is an exploded view of the left wheel detection device;

[0020] FIG3 is an exploded view of the tire tread detection unit;

[0021] FIG4 is a perspective view of the left wheel detection device;

[0022] Figure 5 is a structural diagram of the junction of the front ramp plate and the main shell;

[0023] Figure 6 is a structural diagram of the inner mounting plate;

[0024] FIG7 is a top view of the left wheel detection device;

[0025] FIG8 is a cross-sectional view along line AA in FIG7;

[0026] FIG9 is a cross-sectional view along line BB in FIG7 ;

[0027] FIG10 is a top view of the optical path of the tire tread detection unit;

[0028] FIG11 is a side view of the optical path of the tread pattern detection unit. DETAILED DESCRIPTION

[0029] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0030] The present invention discloses a through-type tread detection device, as shown in Figures 1 to 11, which includes a left wheel detection device 1 and a right wheel detection device 2. The left wheel detection device 1 includes a main shell 10, a front ramp plate 11 and a rear ramp plate 12. The front ramp plate 11 and the rear ramp plate 12 are respectively fixed to the front and rear ends of the main shell 10. A press trigger mechanism 13 is provided at the junction of the front ramp plate 11 and the main shell 10. A tread detection unit 14 for measuring the tread groove depth and a control board 15 are provided in the main shell 10. The press trigger mechanism 13 is electrically connected to the control board 15. The press trigger mechanism 13 is used to send a start signal to the control board 15 when it is squeezed by the tire. The control board 15 is used to control the tread detection unit 14 to measure the tread groove depth of the tire according to the start signal. The structure of the right wheel detection device 2 is the same as that of the left wheel detection device 1.

[0031] In the above structure, the left wheel detection device 1 and the right wheel detection device 2 are respectively provided for the left and right tires to pass through. When the tire travels along the front ramp plate 11 toward the top of the main shell 10, the press trigger mechanism 13 will be triggered at the junction of the front ramp plate 11 and the main shell 10. The press trigger mechanism 13 promptly sends a start signal to the control board 15. The control board 15 then controls the tread detection unit 14 to start detection according to the start signal. When the tire travels to the detection area of ​​the tread detection unit 14, the tread groove depth measurement can be automatically completed during the tire passing. Compared with the optical triggering method used in the prior art, the present invention is not affected by factors such as dust and debris. Compared with the existing mechanical button triggering method, the present invention triggers the press trigger mechanism 13 and starts the tread detection unit 14 in sequence. There is no need to continuously press the mechanical button during the detection process, which can avoid false detection, missed detection, etc. Based on the above characteristics, it can be seen that the pass-through tread detection equipment of the present invention not only has a reasonable structural layout, but also can achieve reliable triggering, which helps to improve the accuracy of tread groove depth detection and detection efficiency.

[0032] 2 , 3 and 6 , in order to achieve reliable support and ensure effective light transmission, in this embodiment, a top plate 100 is fixed to the top of the main shell 10, and a first window 101 and a second window 102 are provided on the top plate 100 in sequence from back to front. The tread detection unit 14 includes a laser emitting unit 140 and a camera unit 141. The laser beam emitted by the laser emitting unit 140 passes through the first window 101 and is emitted toward the tire. The camera unit 141 captures the laser line image of the tire surface through the second window 102.

[0033] Based on the first window 101 and the second window 102 described above, in this embodiment, the laser emitting unit 140 includes a laser emitting device 142 and a laser reflector 143. The laser beam emitted by the laser emitting device 142 is reflected by the laser reflector 143 and then passes through the first window 101. Correspondingly, the camera unit 141 includes a camera 144 and a camera reflector 145. The camera reflector 145 is aligned with the second window 102, and the laser line image of the tire surface is reflected by the camera reflector 145 to the camera 144.

[0034] The optical path of the pass-through tread inspection device in this embodiment is shown in Figures 10 and 11 . The laser beam emitted by the laser emitting device 142 is first reflected by the laser reflector 143 before exiting through the first window 101 and radiating toward the tire, forming a laser line pattern on the tire. Simultaneously, the laser line image on the tire surface is reflected back to the camera 144 by the camera reflector 145. After the camera 144 captures the laser line image, the system built into the control panel 15 or another computer system calculates the tread groove depth based on the captured image, thereby achieving the pass-through inspection function. It should be emphasized that in the above structure, the first window 101 and the second window 102 are arranged sequentially from back to front, with the two windows used for laser emission and laser line image reflection, respectively. Compared to the prior art, the present invention avoids light and shadow interference caused by light entering and exiting the same window, thereby improving inspection accuracy. Furthermore, it also avoids the impact on the load-bearing capacity of the top plate 100 caused by a single window opening being too large.

[0035] Preferably, the camera unit 141 includes two cameras 144 and two camera mirrors 145, located on either side of the laser emitting device 142. Each camera 144 corresponds to each camera mirror 145. The two cameras 144 and the two camera mirrors 145 can each be used to measure the depth of multiple tread grooves on a single tire. In practice, a larger number of cameras and camera mirrors can be installed depending on the number of tread grooves. At the transmitting end, the laser beam emitted by the laser emitting device 142 can simultaneously cover more than three tread grooves.

[0036] In order to facilitate the layout and fixation of various optical components and protect the optical components at the same time, in this embodiment, in combination with Figures 2 and 3, the tire tread detection unit 14 includes a base plate 146 and an inner shell 147, the laser emitting device 142, the laser reflector 143, the camera 144, the camera reflector 145 and the control board 15 are all arranged on the base plate 146, the inner shell 147 is fixedly connected to the base plate 146, and the inner shell 147 is covered above the laser emitting device 142, the camera 144, the camera reflector 145 and the control board 15.

[0037] Furthermore, three through-holes 148 are formed in the bottom plate 146. Three support posts 106 arranged in a "pin" pattern are fixed to the bottom of the main housing 10. Each support post 106 corresponds to each through-hole 148. After passing through the through-holes 148, the support posts 106 abut against the inner wall of the top plate 100. The support provided by the support posts 106 significantly increases the load-bearing capacity of the top plate 100, thereby ensuring the structural stability and reliability of the device.

[0038] In order to better install and fix the push trigger mechanism 13 , in this embodiment, a mounting groove 16 is fixed to the front end of the main housing 10 , and the push trigger mechanism 13 is fixed in the mounting groove 16 .

[0039] 2 and 5 , regarding the preferred structure of the push trigger mechanism 13, in this embodiment, the push trigger mechanism 13 includes a fixed plate 130, the fixed plate 130 includes a plurality of recessed portions 131, a push switch 132 is fixed in each recessed portion 131, a push rod at the upper end of the push switch 132 is sleeved with a push contact 133, a transition plate 110 is formed at the rear end of the front ramp plate 11, the transition plate 110 is flush with the top plate 100, and the transition plate 110 is fixedly connected to the front end of the main shell 10 by screws, a plurality of through-holes 111 are provided on the transition plate 110, the push contacts 133 correspond one to one with the through-holes 111, the push contacts 133 pass through the through-holes 111, and the push contacts 133 can move up and down relative to the through-holes 111. Among them, the fixing plate 130 is bent multiple times to form multiple recessed portions 131, and multiple push switches 132 are respectively fixed in the multiple recessed portions 131. This not only can achieve reliable fixation of the push switches 132, but also can reasonably utilize the internal space of the mounting groove 16, while ensuring that the push contacts 133 are well matched with the perforations 111, which helps to improve the automatic triggering accuracy when the tire passes.

[0040] In order to better install and fix the rear ramp plate 12, in this embodiment, please refer to Figure 2, a bent plate 17 is fixed to the rear end of the main shell 10, and the bent plate 17 is located at the upper edge of the main shell 10. The front end of the rear ramp plate 12 is sleeved on the top of the bent plate 17, and the rear ramp plate 12 and the bent plate 17 are fixedly connected by screws.

[0041] As a preferred embodiment, referring to Figure 6 , an inner mounting plate 104 is attached to the inner side of the top plate 100 and the two are fixedly connected. A first light-transmitting plate 105 and a second light-transmitting plate 106 are fixed to the inner mounting plate 104. The first light-transmitting plate 105 and the second light-transmitting plate 106 are aligned with the first window 101 and the second window 102, respectively. The inner mounting plate 104 can mechanically reinforce the top plate 100, helping to increase the stress-bearing strength of the top plate 100. Furthermore, a plurality of reinforcing ribs are fixed to the bottom of the inner mounting plate 104, and the edges of the inner mounting plate 104 are fixedly connected to the main housing 10 via screws.

[0042] On this basis, the first window 101 is located near the rear end of the main housing 10, and the second window 102 is located near the center of the main housing 10. The laser beam emitted by the laser emitting device 142, after being reflected by the laser reflector 143, sequentially passes through the first light-transmitting plate 105 and the first window 101 to illuminate the tire surface, forming a laser line image on the tire surface. The camera 144 captures the laser line image reflected by the camera reflector 145, allowing the control board to perform subsequent tread groove depth measurement. In this embodiment, the laser emission window and image reflection window are separated to avoid light and shadow interference caused by emission and acquisition through the same window, thereby improving detection accuracy. Furthermore, the first and second windows are positioned as close to the rear end of the main housing 10 as possible, ensuring an appropriate distance between the optical detection position and the press trigger mechanism 13. This provides the control board 15 with sufficient response time during the slow movement of the wheel after triggering the press trigger mechanism 13, thus preventing trigger failures or erroneous acquisitions.

[0043] As a preferred embodiment, multiple U-shaped reinforcements 18 are fixed to the bottom of the front ramp 11 and the bottom of the rear ramp 12. These U-shaped reinforcements 18 increase the load-bearing strength of the bottom of the front ramp 11 and the rear ramp 12, thereby ensuring stable wheel passage. The provision of U-shaped reinforcements 18 in this embodiment reliably supports the front ramp 11 and the rear ramp 12, preventing deformation when wheels pass through.

[0044] In order to facilitate data transmission and power supply, in this embodiment, a wiring groove 19 is provided between the left wheel detection device 1 and the right wheel detection device 2. The cables between the left wheel detection device 1 and the right wheel detection device 2 can be laid through the wiring groove 19. The cables include data cables and power cables. Accordingly, the side of the main shell 10 is also provided with a power strip, an aviation socket, etc. to facilitate the construction and installation of the line layout.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A through-type tire tread detection device, characterized in that: The invention comprises a left wheel detection device and a right wheel detection device, wherein the left wheel detection device comprises a main shell, a front ramp plate and a rear ramp plate, wherein the front ramp plate and the rear ramp plate are respectively fixed to the front and rear ends of the main shell, and a pressing trigger mechanism is arranged at the junction of the front ramp plate and the main shell, and a tread detection unit and a control board for measuring the tread groove depth are arranged in the main shell, wherein the pressing trigger mechanism is electrically connected to the control board, and the pressing trigger mechanism is used to send a starting signal to the control board when it is squeezed by the tire, and the control board is used to control the tread detection unit to measure the tread groove depth of the tire according to the starting signal.

2. The pass-through tire tread detection device according to claim 1, characterized in that: A top plate is fixed on the top of the main shell, and a first window and a second window are provided on the top plate in sequence from back to front. The tread detection unit includes a laser emitting unit and a camera unit. The laser beam emitted by the laser emitting unit passes through the first window and then is emitted to the tire, and the camera unit captures a laser line image of the tire surface through the second window.

3. The pass-through tire tread detection device according to claim 2, characterized in that: The laser emitting unit comprises a laser emitting device and a laser reflecting mirror. The laser beam emitted by the laser emitting device is reflected by the laser reflecting mirror and then passes through the first window.

4. The through-type tire tread detection device according to claim 3, characterized in that: The camera unit includes a camera and a camera reflector. The camera reflector is aligned with the second window, and the laser line image of the tire surface is reflected to the camera through the camera reflector.

5. The through-type tire tread detection device according to claim 4, characterized in that: The camera unit includes two cameras and two camera reflectors. The two camera reflectors are respectively arranged on the left and right sides of the laser emitting device. The cameras correspond to the camera reflectors one by one.

6. The through-type tire tread detection device according to claim 4, characterized in that: The tire tread detection unit includes a base plate and an inner shell. The laser emitting device, the laser reflector, the camera, the camera reflector and the control board are all arranged on the base plate. The inner shell is fixedly connected to the base plate, and the inner shell cover is arranged above the laser emitting device, the camera, the camera reflector and the control board.

7. The through-type tire tread detection device according to claim 6, characterized in that: The bottom plate is provided with three through holes, and the bottom of the main shell is fixed with three support columns distributed in a "pin" shape, the support columns correspond to the through holes one by one, and the support columns abut against the inner wall of the top plate after passing through the through holes.

8. The through-type tire tread detection device according to claim 2, characterized in that: A mounting groove is fixed on the front end of the main shell, and the press trigger mechanism is fixed in the mounting groove.

9. The through-type tire tread detection device according to claim 8, characterized in that: The push trigger mechanism includes a fixing plate, the fixing plate includes a plurality of recessed portions, a push switch is fixed in each recessed portion, a push contact is sleeved on the push rod at the upper end of the push switch, a transition plate is formed at the rear end of the front ramp plate, the transition plate is flush with the top plate, and the transition plate is fixedly connected to the front end of the main shell by screws, a plurality of through holes are formed on the transition plate, the push contacts correspond to the through holes one by one, the push contacts pass through the through holes, and the push contacts can move up and down relative to the through holes.

10. The through-type tire tread detection device according to claim 1, characterized in that: A bent plate is fixed to the rear end of the main shell, the bent plate is located at the upper edge of the main shell, the front end of the rear ramp plate is sleeved on the top of the bent plate, and the rear ramp plate is fixedly connected to the bent plate by screws.

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