Cap strip thickness detection equipment

Abstract

The invention discloses cap strip thickness detection equipment, and relates to the technical field of thickness detection.The cap strip thickness detection equipment comprises a transmission assembly and a detection mechanism, a plurality of linkage pieces in the transmission assembly are attached to the surface of a cap strip, so that the thickness physical changes of the upper surface and the lower surface of the cap strip are obtained in real time; the physical change is converted into a transmittable mechanical transmission action and is fed back to the detection mechanism, and the plurality of photoelectric sensors detect the intensity change of light in the plurality of detection cavities in real time, so that the lifting condition of the linkage piece is reversely deduced, namely, the local thickness condition of the cap strip is judged, and whether the thickness of the cap strip is qualified or not is detected in real time.

Description

Technical Field

[0001] This invention relates to the field of thickness detection technology, and in particular to a crown strip thickness detection device. Background Technology

[0002] Tire belt strips are a core reinforcement component of automobile tires. They are used to secure the belt layer, improve tread rigidity and high-speed stability, while also suppressing belt layer edge peeling and reducing driving noise. Consistent belt strip thickness is a crucial prerequisite for ensuring the stable performance of these functions: any deviation in thickness will lead to regional imbalances in the binding force on the belt layer; thicker areas with excessive binding can cause localized stress concentration, while thinner areas with insufficient binding cannot effectively limit belt layer deformation. Both will result in uneven circumferential force on the tire at high speeds, not only accelerating uneven tread wear and reducing tire wear resistance, but also potentially causing bulges due to localized overload, and in extreme cases, even tire blowouts, seriously threatening driving safety.

[0003] To address this issue, we designed a crown strip thickness detection device. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a crown band thickness detection device. The device can sense the thickness change of the crown band surface in real time through the transmission component and convert the thickness change into a mechanical transmission action and transmit it to the detection mechanism, thereby causing a corresponding change in the light intensity in the detection cavity. By collecting the light intensity change signal in the detection cavity, the device can realize real-time monitoring and judgment of whether the crown band thickness is qualified.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A crown strip thickness detection device includes: a transmission assembly and a detection mechanism; The transmission assembly includes multiple linkages arranged vertically opposite each other, and the multiple linkages are respectively connected in series through two rectangular shafts; one end of the linkage is slidably connected to the rectangular shaft, and the other end is rotatably fitted with the crown belt; a baffle is provided on the linkage, and filter holes are opened on the baffle. The detection mechanism includes: a sleeve, an optical fiber coupler, a laser emitter, and a laser absorber; wherein two sleeves are configured, and multiple baffles are respectively inserted into the two sleeves and extend to the outside of the sleeves; a partition is fixed inside the sleeve between the two baffles, and a through-hole is opened on the partition, and a photoelectric sensor is arranged between the partition and the baffle; both ends of the two sleeves are respectively connected to the optical fiber coupler, and the two optical fiber couplers are respectively connected to the laser emitter and the laser absorber; the light transmission area of ​​the filter holes on the multiple baffles and the through-holes on the multiple partitions is arranged in a sequentially decreasing manner; when the laser beam passes through adjacent filter holes and through-holes, the light transmission power of the filter holes is always higher than that of the through-holes, and the initial filter holes and the laser beam form a certain degree of overlap.

[0006] In one embodiment, the linkage consists of a sliding frame, a baffle, a connecting rod, and a driven roller; multiple sliding grooves are equidistantly spaced along the axial direction of the rectangular shaft, and the sliding frame is nested and assembled within the sliding grooves; two spring pieces are arranged opposite each other inside the sliding frame, with their opposite ends abutting against the wall of the rectangular shaft; the connecting rod has an "L" shape structure rotated 90 degrees, with one end fixedly connected to the sliding frame and the other end rotatably connected to the driven roller; the baffle is installed on the sliding frame.

[0007] In one embodiment, the sliding frame, baffle, and connecting rod among the plurality of linkages are made of aluminum alloy.

[0008] In one embodiment, given the wheel mounting characteristics of the driven rollers, gaps may exist if multiple driven rollers are arranged in a straight line, making it impossible to fully fit the surface of the crown strip. Therefore, an alternating arrangement of two adjacent driven rollers is adopted to achieve full fit of the crown strip surface.

[0009] In one embodiment, multiple interlocking components are arranged alternately, with the upper interlocking components detecting the upper surface of the crown band and the lower interlocking components detecting the lower surface of the crown band, so that the staff can accurately distinguish the unevenness and defects of the upper and lower surfaces of the crown band.

[0010] In one embodiment, a sealing ring is fitted at the connection between the baffle and the sleeve.

[0011] In one embodiment, the filter aperture has a trapezoidal structure, and the initial laser beam irradiates the lower end of the filter aperture, while part of the laser beam is blocked by the filter aperture.

[0012] In one embodiment, multiple photoelectric sensors in the two sleeves are all signal-connected to a computing unit, which communicates bidirectionally with a control unit. The control unit is electrically connected to a motor, an alarm, and a signal transmitting unit, respectively.

[0013] In one embodiment, during operation, multiple photoelectric sensors detect changes in light intensity within the sleeve in real time and convert the light signals into electrical signals, which are then transmitted to the computing unit. The computing unit uses a preset "light intensity-displacement" mapping model to inversely calculate the real-time lifting and lowering displacement of the corresponding linkage. If the computing unit determines that the displacement corresponding to the light intensity is lower than a preset threshold, it will send an abnormal signal to the control unit. After receiving the signal, the control unit will stop the motor, trigger the alarm to issue an audible and visual alarm, and transmit the abnormal data to the terminal through the signal transmission unit.

[0014] In one embodiment, the crown band strip constrains its transmission path through a set of rotating wheels, which are mounted across the frames. The set of rotating wheels consists of positioning wheels, limiting wheels, and a driving motor. The positioning wheels adopt a double-wheel structure with the upper and lower wheels facing each other, with the two positioning wheels clamping the two ends of the crown band strip. The output end of the motor is connected to the positioning wheels for transmission. Four limiting wheels are provided, which abut against the upper and lower surfaces of the crown band strip, constraining part of the crown band strip on the transmission path into an upward concave shape. The four limiting wheels tighten the crown band strip.

[0015] The beneficial effects of this invention are as follows: This invention uses multiple linkages in the transmission assembly to adhere to the surface of the crown band strip, thereby acquiring the physical changes in the thickness of the upper and lower surfaces of the crown band strip in real time. These physical changes are then converted into transmittable mechanical transmission actions and fed back to the detection mechanism. Multiple photoelectric sensors detect the changes in light intensity within multiple detection cavities in real time, thereby deducing the lifting and lowering of the linkages and determining the local thickness of the crown band strip. This enables real-time detection of whether the crown band strip thickness is up to standard. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of one side of the structure of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a schematic diagram of the linkage structure of the present invention; Figure 6 This is a schematic diagram of the filter pore structure of the present invention; Figure 7 This is a schematic diagram showing the arrangement of multiple linkage components in this invention; Figure 8 This is a schematic diagram of the sleeve structure of the present invention; Figure 9 This is a schematic diagram of the control unit system of the present invention; Figure 10 This is a schematic diagram of the detection of the coronal band strip according to the present invention.

[0017] In the diagram: 1. Frame; 11. Assembly plate; 2. Roller assembly; 21. Positioning wheel; 22. Limiting wheel; 20. Motor; 3. Transmission assembly; 31. Upper transmission component; 32. Lower transmission component; 33. Rectangular shaft; 30. Linking component; 301. Sliding frame; 302. Baffle; 303. Connecting rod; 304. Driven roller; 3020. Filter hole; 331. Slide groove; 3021. Baffle one; 4. Detection mechanism; 41. Sleeve; 42. Fiber optic coupler; 43. Laser emitter; 44. Laser absorber; 411. Partition; 412. Detection cavity; 413. Photoelectric sensor; 414. Sealing ring; 4111. Partition one; 100. Crown strip; 101. Detection section. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0019] Please see Figure 1-2 The present invention provides a crown strip thickness detection device, comprising: a frame 1, a roller assembly 2, a transmission component 3, and a detection mechanism 4; Please see Figure 1-2 The frame 1 serves as the mounting base for the entire device, supporting and fixing the roller assembly 2, transmission component 3, and detection mechanism 4. The roller assembly 2 primarily functions as the limiting guide and continuous transmission mechanism for the crown band 100, ensuring its stable posture during the detection process by constraining the transmission path of the crown band 100. The transmission component 3 senses the thickness changes of the crown band 100, capturing thickness fluctuations on the surface of the crown band 100 in real time and converting these physical changes into transmittable mechanical transmission actions, which are then fed back to the detection mechanism 4. The detection mechanism 4 receives the action signals transmitted by the transmission component 3, and after signal conversion and threshold judgment, converts the abnormal signal corresponding to the excessive thickness into an alarm signal, achieving real-time warning of the crown band 100's thickness compliance. Please see Figure 1-2The rotating wheel assembly 2 is straddling the frames 1. The rotating wheel assembly 2 consists of positioning wheels 21, limiting wheels 22, and a driving motor 20. The positioning wheels 21 adopt a double-wheel structure with the upper and lower wheels facing each other. The two positioning wheels 21 clamp the two ends of the crown belt strip 100. The output end of the motor 20 is connected to the positioning wheels 21 for transmission. The crown belt strip 100 is continuously transmitted by driving the positioning wheels 21 to rotate. There are four limiting wheels 22. The four limiting wheels 22 abut against the upper and lower surfaces of the crown belt strip 100, constraining part of the crown belt strip 100 on the transmission path to form an upward concave shape. This section of the crown belt strip 100 is the detection section 101. The purpose of the four limiting wheels 22 is to tighten the detection section 101. The purpose of tightening is to prevent the contact part between the transmission component 3 and the detection section 101 from deforming due to force, and to provide a reference surface for thickness detection. Please see Figure 3-4 The transmission assembly 3 includes an upper transmission component 31 and a lower transmission component 32. The upper transmission component 31 and the lower transmission component 32 have the same structure and are arranged opposite to each other. The upper transmission component 31 is used to detect the thickness change of the upper surface of the detection section 101, and the lower transmission component 32 is used to detect the thickness change of the lower surface of the detection section 101. Please see Figure 4-7 Since the structures of the upper transmission component 31 and the lower transmission component 32 are completely identical, only the structure of the upper transmission component 31 will be described below. The structure of the lower transmission component 32 can be directly understood by referring to the upper transmission component 31. The upper transmission component 31 includes a connecting component 30 and a rectangular shaft 33. The connecting component 30 is made of aluminum alloy and is lightweight. Multiple connecting components 30 are provided and are arranged sequentially along the axial direction of the rectangular shaft 33. The specific structure is as follows: The connecting component 30 consists of a sliding frame 301, a baffle 302, a connecting rod 303, and a driven roller 304. Multiple sliding grooves 331 are equidistantly provided on the rectangular shaft 33 along its axial direction. The sliding frame 301 is nested and assembled in the sliding groove 331, and the sliding groove 331 limits the sliding frame 301 to only move in the vertical direction. The interior of the sliding frame 301... Two spring clips are arranged opposite each other, with their opposite ends abutting against the wall of the rectangular shaft 33 to achieve elastic limiting of the sliding frame 301; the connecting rod 303 has an "L" shaped structure rotated 90 degrees, with one end fixedly connected to the sliding frame 301 and the other end rotatably connected to the driven roller 304, and the driven roller 304 is in contact with the upper surface of the detection section 101; given the wheel mounting characteristics of the driven roller 304, if multiple driven rollers 304 are arranged in a straight line, there will be gaps, and they cannot completely fit the upper surface of the detection section 101. Therefore, two adjacent driven rollers 304 are arranged in an alternating manner to achieve full contact with the upper surface of the detection section 101; a baffle 302 is fixedly installed on the end face of the sliding frame 301, and a trapezoidal filter hole 3020 is opened on the baffle 302; The multiple driven rollers 304 of the lower transmission member 32 are located on one side of the multiple driven rollers 304 of the upper transmission member 31, and the multiple driven rollers 304 of the lower transmission member 32 are in contact with the lower surface of the detection section 101. The purpose of this structural design is to realize the separate detection of the upper and lower surfaces of the detection section 101. If the upper and lower surfaces of the detection section 101 are detected at the same time, the multiple driven rollers 304 of the upper transmission member 31 and the lower transmission member 32 will move synchronously due to the influence of the thickness of the detection section 101, which makes it impossible for the operator to accurately distinguish the unevenness and defects of the upper and lower surfaces of the detection section 101. Please see Figure 4 , Figure 8 The detection mechanism 4 is fixedly installed on the frame 1 via the assembly plate 11. It includes a sleeve 41, an optical fiber coupler 42, a laser emitter 43, and a laser absorber 44. Two sleeves 41 are provided. Multiple baffles 302 in the upper transmission component 31 and the lower transmission component 32 are respectively inserted into the two sleeves 41 and extend to the outside of the sleeves 41. A sealing ring 414 is fitted at the connection between the baffles 302 and the sleeves 41 to achieve a sealed isolation between the inside of the sleeves 41 and the external environment. A partition 411 is fixedly installed inside each sleeve 41 between the two sets of baffles 302. A through-hole is opened on the partition 411, and the baffles 302 and the partition 411 enclose a detection cavity 412. Each detection cavity 412 is equipped with a photoelectric sensor 413. The photoelectric sensor 413 is used to detect the light intensity change in the detection cavity 412 in real time. The two ends of the two sleeves 41 are respectively connected to the fiber optic couplers 42. One fiber optic coupler 42 is connected to the laser emitter 43, and the other fiber optic coupler 42 is connected to the laser absorber 44. During operation, the laser beam emitted by the laser emitter 43 is split into two beams with equal power by the fiber optic coupler 42. The two laser beams pass through the two sleeves 41 respectively and are received by the fiber optic coupler 42 on the other side and transmitted to the laser absorber 44. In the initial state, the laser beam and the filter holes 3020 on each baffle 302 are staggered. Through the light intensity change signals in multiple detection cavities 412, multiple photoelectric sensors 413 can respectively detect the real-time lifting and lowering displacement of multiple linkages 30. Please see Figure 8 Along direction E, the light-transmitting areas of the filter holes 3020 on the multiple baffles 302 and the through holes on the multiple partitions 411 are arranged in a sequentially decreasing manner; taking baffle 3021 and partition 4111 as an example: the light-transmitting area of ​​the filter hole 3020 on baffle 3021 is 10mm². 2 The light-transmitting area of ​​the through-hole in partition 4111 is 5mm². 2The light-transmitting areas of the filter apertures 3020 of each subsequent baffle 302 and the through-holes of the corresponding partitions 411 are set according to this decreasing logic, so that when the laser beam passes through the partition 411, there is always "blocked redundant laser" in the detection cavity 412; when the baffle 3021 moves to its maximum stroke, the light-transmitting power of the laser beam through the filter aperture 3020 of the baffle 3021 is still always greater than the light-transmitting power through the through-hole of the partition 4111; that is, after the baffle 3021 moves, the intersection area of ​​the filter aperture 3020 and the laser beam increases, and the spot area of ​​the laser beam through the filter aperture 3020 decreases to 6mm. 2 At this point, after the laser beam passes through filter 3020, there is a 4mm... 2 The light spot area is blocked by the partition 4111, while the light spot area and corresponding power output from the through-hole of the partition 4111 remain constant; the photoelectric sensor 413 in the detection cavity 412 can obtain the lifting displacement of the corresponding linkage 30 by the light intensity change in the detection cavity 412, and then infer the thickness of the corresponding local part of the detection section 101. The purpose of the above structure is that if the area of ​​the laser beam after passing through the opening of the partition 411 changes with the movement of the upstream baffle 302, when the laser beam enters the downstream detection cavity 412, the change in light intensity detected by the photoelectric sensor 413 in the downstream detection cavity 412 will be affected by the upstream structure, rather than solely by the movement of the baffle 302 on the corresponding side of the detection cavity 412. Ultimately, it will be impossible to accurately obtain the lifting and lowering status of the corresponding linkage 30, thus affecting the accuracy of the local thickness detection of the detection section 101. Please see Figure 9 The two sleeves 41 are defined as the upper sleeve and the lower sleeve, respectively. Multiple photoelectric sensors 413 on the upper sleeve and the lower sleeve are connected to the computing unit. The computing unit communicates bidirectionally with the control unit. The control unit is electrically connected to the motor 20, the alarm and the signal transmitting unit, respectively, forming a complete detection-control-feedback system. During operation, multiple photoelectric sensors 413 detect changes in light intensity in the corresponding detection cavity 412 in real time and convert the light signal into an electrical signal and transmit it to the computing unit. The computing unit calculates the real-time lifting and lowering displacement of the corresponding linkage 30 based on a preset "light intensity-displacement" mapping model. When the local thickness of the crown strip 100 becomes thinner, it will drive the linkage 30 to descend and drive the baffle 302 to move synchronously, which will further increase the degree of intersection between the filter hole 3020 and the laser beam, thereby reducing the amount of laser light that passes through the filter hole 3020 and is scattered into the detection cavity 412 by the baffle 411, and the light intensity in the detection cavity 412 will weaken accordingly. If the calculation unit determines that the displacement corresponding to the light intensity is lower than the preset threshold, it will send an abnormal signal to the control unit. After receiving the signal, the control unit will simultaneously perform three operations: 1. Control the motor 20 to stop to prevent the unqualified crown strip from being continuously conveyed; 2. Trigger the alarm to issue an audible and visual alarm to remind the staff to handle the situation in time; 3. Transmit the abnormal data (including displacement and abnormal photoelectric sensor 413 number) to the terminal through the signal transmission unit. The staff can directly determine the following based on the terminal data: 1. Crown strip 100 has a local thinning defect; 2. Obtain the thinning size based on the displacement data; 3. Locate the specific area of ​​thinning of crown strip 100 based on the position of abnormal photoelectric sensor 413. Based on the above data, a basis for the local scrapping of crown strip 100 can be provided. Because the surface of the crown strip 100 is rough, and a slight vibration will be generated during the transmission of the crown strip 100, the vibration is transmitted to the linkage 30 through the detection section 101, which in turn causes the baffle 302 to move slightly. This displacement will cause the intersection area of ​​the laser beam and the filter hole 3020 to increase or decrease. The increased or decreased intersection area is still within the preset threshold range after being checked by the photoelectric sensor 413. The laser emitter 43 did not directly use laser ranging to detect the thickness of the crown strip 100. The reasons are as follows: First, laser ranging is strictly dependent on the condition of the surface being measured and is only suitable for ideal surfaces with high reflectivity and low roughness. However, the surface of the crown strip 100 often has a matte or black finish and a certain degree of roughness. Such surfaces can cause the laser signal to be absorbed, scattered, or reflected in disorder, leading to signal loss and serious deviations in measurement values. Second, the detection of the crown strip 100 is mostly carried out at the tire production site. Dust, water vapor, and other impurities in the environment can interfere with the transmission path of the laser beam. Dust particles can scatter the laser beam, and water vapor can refract the beam, making it difficult for the laser receiver to stably receive the reflected signal, thus disrupting the continuity and reliability of the measurement process. Existing technologies already employ pressure sensors to detect thickness, the core of which is to obtain the thickness data of the object being tested by converting pressure values. This invention selects a photoelectric sensor 413 to replace the pressure sensor, the core purpose of which is to solve the shortcomings of pressure sensors in terms of service life: the photoelectric sensor 413 adopts a non-contact detection principle, its core optical elements have no physical contact, there is no mechanical friction loss, and the stability is stronger; while the internal elastic elements of the pressure sensor are prone to fatigue aging under long-term stress, resulting in a decrease in detection accuracy, requiring frequent calibration or replacement, which not only affects detection efficiency but also significantly increases equipment maintenance costs.

[0020] Working principle of this invention: Please see Figure 10For example, if the upper surface of the detection section 101 becomes thinner, the linkage 30 moves downward, which in turn moves the baffle 3021 downward. At this time, the degree of intersection between the filter aperture 3020 and the laser beam further increases, resulting in a decrease in the amount of laser light passing through the filter aperture 3020 and being scattered into the detection cavity 412 by the partition 411. Consequently, the light intensity in the detection cavity 412 weakens, and the photoelectric sensor 413 transmits this abnormal signal to the computing unit. Alternatively, if the upper surface of the detection section 101 becomes thicker, the linkage 30 moves upward, which in turn moves the baffle 3021 upward. At this time, the degree of intersection between the filter aperture 3020 and the laser beam decreases, resulting in an increase in the amount of laser light passing through the filter aperture 3020 and being scattered into the detection cavity 412 by the partition 411. Consequently, the light intensity in the detection cavity 412 strengthens, and the photoelectric sensor 413 transmits this abnormal signal to the computing unit.

[0021] The calculation unit determines that the displacement corresponding to the light intensity is lower or higher than a preset threshold and sends an abnormal signal to the control unit. After receiving the signal, the control unit controls the motor 20 to stop, triggers the alarm to issue an audible and visual alarm, and transmits the abnormal data to the terminal through the signal transmission unit. The staff can directly determine the problem through the terminal data. If the data is higher than the threshold, it indicates that the crown strip 100 has a local thickening, and vice versa, it indicates that the crown strip 100 has a local thinning. Based on this data, the displacement of the linkage 30 is obtained, that is, the thickening or thinning size of the crown strip 100 is obtained. Based on the position of the abnormal photoelectric sensor 413, the specific area of ​​the defect in the crown strip 100 is located.

[0022] The above embodiments are merely one of the preferred embodiments of the present invention and should not be used to limit the scope of protection of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but solve the same technical problem as the present invention, should be included within the scope of protection of the present invention.

Claims

1. A crown band thickness detection device, comprising: Transmission assembly (3) and detection mechanism (4); characterized in that the transmission assembly (3) includes a plurality of vertically opposed linkages (30), the plurality of linkages (30) being connected in series via two rectangular shafts (33); one end of the linkage (30) is slidably connected to the rectangular shaft (33), and the other end is rotatably attached to the coronal belt; a baffle (302) is provided on the linkage (30), and a filter hole (3020) is provided on the baffle (302); The detection mechanism (4) includes: a sleeve (41), an optical fiber coupler (42), a laser emitter, and a laser absorber (44); wherein there are two sleeves (41), and multiple baffles (302) are respectively inserted into the two sleeves (41) and extend to the outside of the sleeves (41); a partition (411) is fixed inside the sleeve (41) between the two baffles (302), and a through opening is provided on the partition (411); a photoelectric sensor (413) is provided between the partition (411) and the baffles (302). The two ends of the two sleeves (41) are respectively connected to the optical fiber coupler (42), and the two optical fiber couplers (42) are respectively connected to the laser emitter and the laser absorber (44); the light transmission area of ​​the filter holes (3020) on the multiple baffles (302) and the through holes on the multiple partitions (411) is arranged in a decreasing order; when the laser beam passes through the adjacent filter holes (3020) and through holes, the light transmission power of the filter holes (3020) is always higher than the light transmission power of the through holes, and the initial filter holes (3020) and the laser beam form a certain stagger.

2. The crown strip thickness detection device according to claim 1, characterized in that: The linkage (30) consists of a sliding frame (301), a baffle (302), a connecting rod (303), and a driven roller (304); a plurality of sliding grooves (331) are equidistantly provided along the axial direction of the rectangular shaft (33), and the sliding frame (301) is nested and assembled in the sliding groove (331); two spring pieces are arranged opposite each other inside the sliding frame (301), and the opposite ends of the two spring pieces abut against the wall of the rectangular shaft (33); the connecting rod (303) has an "L" shaped structure rotated ninety degrees, one end of which is fixedly connected to the sliding frame (301), and the other end is rotatably connected to the driven roller (304); the baffle (302) is installed on the sliding frame (301).

3. The crown strip thickness detection device according to claim 2, characterized in that... The sliding frame (301), baffle (302), and connecting rod (303) of the multiple linkages (30) are made of aluminum alloy.

4. The crown strip thickness detection device according to claim 2, characterized in that: Given the wheel mounting characteristics of the driven rollers (304), if multiple driven rollers (304) are arranged in a straight line, there will be gaps, which will not be able to fully fit the surface of the crown strip (100). Therefore, the method of staggering two adjacent driven rollers (304) is adopted to achieve full fit of the surface of the crown strip (100).

5. The crown strip thickness detection device according to claim 4, characterized in that: Multiple linkages (30) are staggered, meaning that multiple linkages (30) above detect the upper surface of the crown strip (100), and multiple linkages (30) below detect the lower surface of the crown strip (100), so that the staff can accurately distinguish the concave and convex defects of the upper and lower surfaces of the crown strip (100).

6. The crown strip thickness detection device according to claim 1, characterized in that: A sealing ring (414) is fitted at the connection between the baffle (302) and the sleeve (41).

7. The crown strip thickness detection device according to claim 1, characterized in that: The filter hole (3020) has a trapezoidal structure. The initial laser beam irradiates the lower end of the filter hole (3020), and part of the laser beam is blocked by the filter hole (3020).

8. The crown strip thickness detection device according to claim 1, characterized in that: Multiple photoelectric sensors (413) in the two sleeves (41) are connected to the computing unit via signal. The computing unit communicates bidirectionally with the control unit. The control unit is electrically connected to the motor (20), the alarm and the signal transmitting unit, respectively.

9. The crown strip thickness detection device according to claim 8, characterized in that: During operation, multiple photoelectric sensors (413) detect changes in light intensity inside the sleeve (41) in real time and convert the light signal into an electrical signal and transmit it to the computing unit; the computing unit calculates the real-time lifting and lowering displacement of the corresponding linkage (30) based on the preset "light intensity-displacement" mapping model. If the calculation unit determines that the displacement corresponding to the light intensity is lower than the preset threshold, it will send an abnormal signal to the control unit. After receiving the signal, the control unit will control the motor (20) to stop, trigger the alarm to issue an audible and visual alarm, and transmit the abnormal data to the terminal through the signal transmission unit.

10. The crown strip thickness detection device according to claim 1, characterized in that: The crown strip (100) is constrained by the roller assembly (2), which is mounted across the frame (1). The roller assembly (2) consists of a positioning wheel (21), a limiting wheel (22), and a driving motor (20). The positioning wheel (21) adopts a double wheel structure with the upper and lower wheels facing each other. The two positioning wheels (21) clamp the two ends of the crown strip (100). The output end of the motor (20) is connected to the positioning wheel (21) for transmission. There are four limiting wheels (22). The four limiting wheels (22) abut against the upper and lower surfaces of the crown strip (100) to constrain the crown strip (100) on part of the transmission path into an upward concave shape. The four limiting wheels (22) tighten the crown strip (100).

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