Online thickness measuring device and use method

Abstract

The invention discloses an online thickness measuring device and a using method, and belongs to the technical field of wire harness adhesive tape production. The online thickness measuring device comprises a first thickness measuring assembly and further comprises a second thickness measuring assembly, a base material is arranged in the first thickness measuring assembly, an adhesive tape is arranged in the second thickness measuring assembly, a fixing box is arranged above the first thickness measuring assembly, and a measuring roller and a lifting roller are arranged in the first thickness measuring assembly. In order to solve the problems that during wire harness adhesive tape production, the adhesive output amount of a coating machine is difficult to quickly judge, and the quality of the produced adhesive tape is unstable, the thickness of a determined area of a base material is measured firstly, and then the thickness of the adhesive tape coated in the determined area of the base material is measured, so that two groups of corresponding thickness data are obtained; and finally, the thickness of the adhesive tape subtracts the thickness of the base material to obtain the thickness of the hot melt adhesive in a determined area, and personnel can adjust the adhesive output of the coating machine according to the thickness of the hot melt adhesive, so that the quality of the produced adhesive tape is stabilized.

Description

Technical Field

[0001] The invention relates to the technical field of wire harness tape production, and in particular to an online thickness measuring device and a use method thereof. Background Art

[0002] UV coating process is a new technology. UV glue coating process does not require drying equipment. UV glue is 100% solid, does not contain flux and is pollution-free. UV coating equipment has the advantages of fast production speed, high efficiency, low cost, low energy consumption, and small equipment footprint. It is widely used in packaging, medicine, automobiles, clothing, footwear, electronics and other industries, and has become a development trend with huge market prospects.

[0003] After the coater coats UV hot melt adhesive on the substrate, the substrate is evenly cut into multiple tapes. However, the amount of adhesive on the same batch of tapes may vary due to factors such as equipment aging, resulting in unstable tape quality. The existing method mainly relies on production personnel to take multiple samples at regular intervals, measure the samples to obtain the tape thickness, and then adjust the coater's glue output according to the data change. This method is relatively cumbersome and it is difficult to quickly and accurately judge the change in the amount of adhesive. At the same time, the sampling process also wastes a lot of products. There is a problem that the amount of adhesive output of the coater is difficult to quickly judge during the production of wiring harness tapes, and the quality of the produced tapes is unstable. Therefore, it does not meet the existing needs. In this regard, the present application proposes an online thickness measuring device and a method for using it. Summary of the invention

[0004] The purpose of the present invention is to provide an online thickness measuring device and a method of using the same. The device first measures the thickness of a determined area of ​​a substrate, and then measures the thickness of a tape after coating the determined area of ​​the substrate, thereby obtaining two sets of corresponding thickness data. Finally, the thickness of the hot melt adhesive in the determined area can be obtained by subtracting the thickness of the substrate from the thickness of the tape. Personnel can adjust the glue output of the coating machine according to the thickness of the hot melt adhesive, thereby stabilizing the quality of the produced tape and solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an online thickness measuring device, comprising a first thickness measuring component and a second thickness measuring component, wherein a substrate is arranged inside the first thickness measuring component, a tape is arranged inside the second thickness measuring component, the substrate is connected to the tape, a fixing box is arranged above the first thickness measuring component, a measuring roller and a lifting roller are arranged inside the first thickness measuring component, a laser rangefinder probe is arranged inside the fixing box, a roller is arranged below the fixing box, laser thickness gauge probes are arranged above and below the tape, a laser emitting end of the laser thickness gauge probe faces the surface of the tape, and a cooling chamber is arranged on one side of the second thickness measuring component.

[0006] Preferably, a first guide roller is provided inside the first thickness measuring assembly, the first guide roller is located below the lifting roller, the measuring roller is located between the two lifting rollers, and the substrate passes through the first guide roller, the lifting roller and the measuring roller in sequence along the moving direction of the substrate.

[0007] Preferably, a first mounting plate is provided at both ends of the measuring roller, a U-shaped seat is provided below the lifting roller, a first slider is provided on the side of the U-shaped seat, a first slide is provided on one side of the U-shaped seat, a first telescopic rod is provided below the U-shaped seat, the first slide is installed on the first mounting plate, and the first slider is located inside the first slide.

[0008] Preferably, a motor is provided at one end of the measuring roller, a cleaning roller is provided below the measuring roller, a cleaning brush is provided on the side of the cleaning roller, the cleaning brush contacts the side of the measuring roller, and the substrate passes between the measuring roller and the roller.

[0009] Preferably, a cross bar is provided on one side of the fixing box, and second telescopic rods are provided at both ends of the cross bar, a limiting block is provided on one side of the second telescopic rod, the two ends of the second telescopic rod are respectively connected to the cross bar and the first mounting plate, the lower end of the limiting block is connected to the first mounting plate, and the cross bar is connected to the fixing box screws.

[0010] Preferably, the fixed box is a rectangular structure with an open lower end, a guide column is provided inside the fixed box, a movable plate is provided above the roller, the movable plate and the roller are connected through a column, the roller is connected to the lower end axis of the column, the upper end of the guide column is connected to the inner top surface of the fixed box, the lower end of the guide column extends through the movable plate to the open end of the fixed box, and a stopper is provided at the lower end of the guide column.

[0011] Preferably, an exhaust pump is provided above the cooling chamber, a cold air chamber is provided below the cooling chamber, a second guide roller is provided inside the cooling chamber, a third guide roller is provided inside the second thickness measuring assembly, second mounting plates are provided at both ends of the third guide roller, and a first support column and a second support column are respectively provided inside the two second mounting plates.

[0012] Preferably, a second slide is arranged between the first support column and the second support column, a third slide is arranged inside the first support column, a positioning groove is arranged inside the second support column, one end of the second slide is located inside the third slide, the other end of the second slide passes through the positioning groove, a second slider is arranged inside the second slide, and the laser thickness gauge probe is installed on the second slider.

[0013] Preferably, a screw rod is provided on one side of the second support column, the screw rod is connected to the second support column shaft, a turntable is provided on the upper end of the screw rod, at least two second slides are provided, the two second slides are threadedly connected to the screw rod, along the moving direction of the tape, the tape passes through the cooling chamber, the second guide roller, the third guide roller and between the two second slides in sequence, a fan is provided inside the cold air chamber, a grille is provided on the top of the cold air chamber, a filter chamber and a cold air duct are provided on the side of the cold air chamber, and the grille is located inside the cooling chamber.

[0014] An online thickness measurement method is implemented based on an online thickness measurement device, comprising the following steps:

[0015] Step 1: Install at least five control boxes on the crossbar, with the distance between each control box being equal, and fix at least five laser thickness gauge probes inside the upper and lower second slideways, respectively, with the distance between each laser thickness gauge probe being equal, and the control boxes and the laser thickness gauge probes corresponding to each other;

[0016] Step 2: First, use the first telescopic rod to adjust the height of the lifting roller until the measuring roller is slightly higher than the lifting rollers on both sides, and then use the second telescopic rod to adjust the height of the fixed box until the roller contacts the lifting roller;

[0017] Step 3: The substrate first passes through the first thickness measuring component, then passes through the coating machine, and finally passes through the cooling chamber and the second thickness measuring component in sequence. When the substrate passes through the roller and the lifting roller, the movable plate rises along the guide column, and the laser rangefinder probe collects the displacement data of the movable plate rising and transmits it to the computer. After the substrate is coated by the coating machine, it becomes a tape. When the tape passes between the upper and lower sets of laser thickness gauge probes, the thickness data of the tape is obtained, and the thickness data is also transmitted to the computer.

[0018] Step 4: The computer subtracts the corresponding displacement data from the thickness data to obtain the thickness of the hot melt adhesive after coating the substrate. The personnel can adjust the glue output of the coating machine according to the change in the thickness of the hot melt adhesive.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention first measures the thickness of a determined area of ​​the substrate using at least five laser rangefinder probes to obtain five thickness data from the left end to the right end of the substrate, and then measures the thickness of the tape after coating the determined area of ​​the substrate using at least five laser thickness gauge probes to obtain five thickness data from the left end to the right end of the tape, thereby obtaining two sets of different thickness data. Finally, the five hot melt adhesive thicknesses from left to right in the determined area can be obtained by subtracting the corresponding substrate thickness from the tape thickness. Personnel can adjust the glue output of the coating machine according to the five hot melt adhesive thicknesses. For example, if the hot melt adhesive thickness at the left end is too large, personnel can reduce the glue output of the coating machine at the left end, thereby stabilizing the quality of the produced tape and improving the production efficiency of the wiring harness tape.

[0021] 2. The present invention measures the thickness of the substrate by setting a first thickness measuring component and measures the thickness of the tape after the substrate is coated by setting a second thickness measuring component, wherein the thickness of the substrate is mainly determined by the displacement of the roller when the substrate passes between the measuring roller and the roller. As the substrate continuously passes between the measuring roller and the roller, the roller continuously rises or falls along the guide column, and the laser rangefinder probe continuously obtains the displacement of the rise or fall, thereby obtaining the thickness of the substrate; the thickness of the tape is determined by the tape passing through the upper and lower groups of laser thickness gauge probes. Compared with the traditional method in which personnel take multiple tape samples at regular intervals and measure the samples to obtain the thickness of the tape, the labor cost is greatly reduced, the waste of tape products is reduced, the purpose of online simultaneous measurement of the thickness of the substrate and the tape is achieved, timeliness is improved, and production efficiency is improved.

[0022] 3. The present invention sets a cooling chamber on one side of the second thickness measuring component. The substrate first passes through the first thickness measuring component, then passes through the coater, and finally passes through the cooling chamber and the second thickness measuring component in sequence. After the substrate is coated, a tape is obtained. The tape is then guided to the inside of the cooling chamber by the second guide roller. At this time, the adhesive side of the tape faces upward, and the adhesive-free side of the tape faces downward. A cold air chamber is set below the tape. The cold air in the cold air duct enters the inside of the cold air chamber after filtering impurities in the filter chamber. Then the cold air is guided to the inside of the cooling chamber by the fan. Since the adhesive-free side of the tape faces downward, the influence of the cold air on the adhesive side of the tape is avoided. At the same time, the cold air is filtered and then contacts the tape, which also avoids the adsorption of impurities such as dust in the cold air on the tape, thereby improving the production quality of the tape and helping to improve the accuracy of the subsequent second thickness measuring component in measuring the thickness of the tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the partial structure of the first thickness measuring assembly of the present invention;

[0024] Figure 2 It is a schematic diagram of the local structure of the measuring roller of the present invention;

[0025] Figure 3 It is a schematic diagram of the local structure of the fixing box of the present invention;

[0026] Figure 4 It is a schematic diagram of the local structure of the cold air chamber of the present invention;

[0027] Figure 5 It is a schematic diagram of the local structure of the cooling chamber of the present invention;

[0028] Figure 6 It is a partial structural schematic diagram of the second thickness measuring assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the local structure of the laser thickness gauge probe of the present invention;

[0030] Figure 8 It is a schematic diagram of the position of the adhesive tape of the present invention.

[0031] In the figure: 1. first thickness measuring assembly; 101. first mounting plate; 102. first guide roller; 103. lifting roller; 104. first slideway; 105. U-shaped seat; 106. first slide block; 107. first telescopic rod; 2. fixing box; 201. cross bar; 202. second telescopic rod; 203. stopper; 204. roller; 205. moving plate; 206. guide column; 2061. stopper; 207. laser rangefinder probe; 3. substrate; 4. measuring roller; 401. motor; 402. Cleaning roller; 5. Cooling chamber; 501. Vacuum pump; 502. Second guide roller; 6. Second thickness measuring assembly; 601. Second mounting plate; 602. Third guide roller; 7. Cold air chamber; 701. Filter chamber; 702. Cold air duct; 703. Fan; 704. Grille; 8. Adhesive tape; 9. Laser thickness gauge probe; 901. Second slider; 902. Second slideway; 903. First support column; 904. Third slideway; 905. Second support column; 906. Positioning groove; 907. Screw. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to solve the problem that the glue output of the coating machine is difficult to quickly determine during the production of wire harness tape, and the quality of the produced tape is unstable, please refer to Figure 1-8 , this embodiment provides the following technical solutions:

[0034] An online thickness measuring device includes a first thickness measuring component 1 and a second thickness measuring component 6. A substrate 3 is arranged inside the first thickness measuring component 1, and an adhesive tape 8 is arranged inside the second thickness measuring component 6. The substrate 3 is connected to the adhesive tape 8. A fixed box 2 is arranged above the first thickness measuring component 1. A measuring roller 4 and a lifting roller 103 are arranged inside the first thickness measuring component 1. A laser rangefinder probe 207 is arranged inside the fixed box 2. A roller 204 is arranged below the fixed box 2. Laser thickness gauge probes 9 are arranged above and below the adhesive tape 8. The laser emitting end of the laser thickness gauge probe 9 faces the surface of the adhesive tape 8. A cooling chamber 5 is arranged on one side of the second thickness measuring component 6.

[0035] A first guide roller 102 is arranged inside a thickness measuring assembly 1, and the first guide roller 102 is located below the lifting roller 103. The measuring roller 4 is located between the two lifting rollers 103. The substrate 3 passes through the first guide roller 102, the lifting roller 103 and the measuring roller 4 in sequence along the moving direction of the substrate 3. Both ends of the measuring roller 4 are provided with a first mounting plate 101. A U-shaped seat 105 is arranged below the lifting roller 103. A first slider 106 is arranged on the side of the U-shaped seat 105. One side of the U-shaped seat 105 is provided with The first slide 104 and the first telescopic rod 107 are arranged below the U-shaped seat 105. The first slide 104 is installed on the first mounting plate 101. The first slider 106 is located inside the first slide 104. A motor 401 is arranged at one end of the measuring roller 4. A cleaning roller 402 is arranged below the measuring roller 4. A cleaning brush is arranged on the side of the cleaning roller 402. The cleaning brush contacts the side of the measuring roller 4. The motor 401 drives the cleaning roller 402 to rotate. The cleaning brush ensures the cleanliness of the surface of the cleaning roller 402.

[0036] A cross bar 201 is provided on one side of the fixed box 2, and second telescopic rods 202 are provided at both ends of the cross bar 201. A limiting block 203 is provided on one side of the second telescopic rod 202. The two ends of the second telescopic rod 202 are respectively connected to the cross bar 201 and the first mounting plate 101, and the lower end of the limiting block 203 is connected to the first mounting plate 101. The cross bar 201 is screwed to the fixed box 2. The fixed box 2 is a rectangular structure with an open lower end. A guide column 206 is provided inside the fixed box 2, and a movable plate 205 is provided above the roller 204. The movable plate 205 is connected to the roller 204 through a column, and the roller 204 is connected to the lower end shaft of the column. The upper end of the guide column 206 is connected to the inner top surface of the fixed box 2, and the lower end of the guide column 206 extends to the open end of the fixed box 2 through the movable plate 205, and the lower end of the guide column 206 is provided with a stopper 2061.

[0037] Specifically, the substrate 3 passes between the measuring roller 4 and the roller 204, and at least five fixed boxes 2 are arranged from left to right, and the distance between two fixed boxes 2 is equal. As the substrate 3 continuously passes between the measuring roller 4 and the roller 204, the roller 204 continuously rises or falls along the guide column 206, and the movable plate 205 moves along with the roller 204, and the laser rangefinder probe 207 continuously obtains the displacement of the movable plate 205 rising or falling, thereby obtaining the thickness of the substrate 3. At the same time, the fixed box 2 and the movable plate 205 form a closed structure, and the laser rangefinder probe 207 detects inside the fixed box 2, which can reduce the influence of the external environment on the detection result, and further improves the accuracy of the thickness measurement of the substrate 3.

[0038] An air pump 501 is arranged above the cooling chamber 5, a cold air chamber 7 is arranged below the cooling chamber 5, a second guide roller 502 is arranged inside the cooling chamber 5, a third guide roller 602 is arranged inside the second thickness measuring assembly 6, second mounting plates 601 are arranged at both ends of the third guide roller 602, first support columns 903 and second support columns 905 are arranged inside the two second mounting plates 601, a second slideway 902 is arranged between the first support column 903 and the second support column 905, a third slideway 904 is arranged inside the first support column 903, and a second slideway 906 is arranged inside the second support column 907. A positioning groove 906 is provided inside the support column 905, one end of the second slide 902 is located inside the third slide 904, the other end of the second slide 902 passes through the positioning groove 906, a second slider 901 is provided inside the second slide 902, the laser thickness gauge probe 9 is installed on the second slider 901, a screw rod 907 is provided on one side of the second support column 905, the screw rod 907 is connected to the shaft of the second support column 905, a turntable is provided on the upper end of the screw rod 907, at least two second slides 902 are provided, and the two second slides 902 are both threadedly connected to the screw rod 907.

[0039] Specifically, at least five laser rangefinder probes 207 are used to measure the thickness of a determined area of ​​the substrate 3 to obtain five thickness data from the left end to the right end of the substrate 3. Then, the thickness of the tape 8 coated with the determined area of ​​the substrate 3 is measured using at least two groups of upper and lower laser thickness gauge probes 9, each group of five, to obtain five thickness data from the left end to the right end of the tape 8, thereby obtaining two different sets of thickness data. Finally, the thickness of the tape 8 minus the corresponding thickness of the substrate 3 can obtain the five hot melt adhesive thicknesses from left to right in the determined area. The personnel can adjust the glue output of the coating machine according to the five hot melt adhesive thicknesses. For example, if the hot melt adhesive thickness at the left end is too large and exceeds the set value, the personnel can reduce the glue output of the coating machine at the left end, thereby stabilizing the quality of the produced tape 8. Compared with the traditional method in which personnel take multiple tape 8 samples at regular intervals and measure the samples to obtain the thickness of the tape 8, the labor cost is greatly reduced, the waste of tape 8 products is reduced, the purpose of online simultaneous measurement of the thickness of the substrate 3 and the tape 8 is achieved, timeliness is improved, and production efficiency is further improved.

[0040] An exhaust pump 501 is arranged on the top of the cooling chamber 5, and a cold air chamber 7 is arranged on the bottom of the cooling chamber 5. Along the moving direction of the tape 8, the tape 8 passes through the cooling chamber 5, the second guide roller 502, the third guide roller 602 and the two second slideways 902 in sequence. A fan 703 is arranged inside the cold air chamber 7. A grille 704 is arranged on the top of the cold air chamber 7. A filter chamber 701 and a cold air duct 702 are arranged on the side of the cold air chamber 7. The grille 704 is located inside the cooling chamber 5.

[0041] Specifically, after the substrate 3 is coated, the tape 8 is obtained, and the tape 8 is guided by the second guide roller 502 to the interior of the cooling chamber 5. At this time, the cold air in the cold air duct 702 enters the interior of the cold air chamber 7 after filtering impurities through the filter chamber 701, and then the cold air is guided to the interior of the cooling chamber 5 by the fan 703. Since the adhesive surface of the tape 8 faces upward and the adhesive-free surface of the tape 8 faces downward, the influence of the cold air on the adhesive surface of the tape 8 is avoided. At the same time, the cold air is filtered and then contacts the tape 8, which also avoids the dust and other impurities in the cold air from being adsorbed on the tape 8, thereby improving the production quality of the tape 8 and helping to improve the accuracy of the subsequent second thickness measuring component 6 in measuring the thickness of the tape 8.

[0042] An online thickness measurement method is implemented based on an online thickness measurement device, and is characterized by comprising the following steps:

[0043] Step 1: Install at least five control boxes 2 on the crossbar 201 from left to right, with the distance between each control box 2 being equal, and fix at least five laser thickness gauge probes 9 inside the upper and lower second slideways 902 from left to right, respectively, with the distance between each laser thickness gauge probe 9 being equal, and the laser rangefinder probe 207 in the control box 2 corresponds to the laser thickness gauge probe 9 from left to right in sequence;

[0044] Step 2: first adjust the height of the lifting roller 103 by the first telescopic rod 107 until the measuring roller 4 is slightly higher than the lifting rollers 103 on both sides, and then adjust the height of the fixing box 2 by the second telescopic rod 202 until the roller 204 is in contact with the lifting roller 103, and adjust the upper and lower corresponding laser thickness gauge probes 9 in turn to make the upper five laser thickness gauge probes 9 and the lower five laser thickness gauge probes 9 stable and aligned;

[0045] Step 3, the substrate 3 first passes through the first thickness measuring component 1, then passes through the coating machine, and finally passes through the cooling chamber 5 and the second thickness measuring component 6 in sequence, wherein when the substrate 3 passes through the roller 204 and the lifting roller 103, the movable plate 205 rises along the guide column 206, and the laser rangefinder probe 207 collects the displacement data of the movable plate 205 rising and transmits it to the computer, and the substrate 3 is coated by the coating machine to become the adhesive tape 8, and when the adhesive tape 8 passes between the upper and lower sets of laser thickness gauge probes 9, the thickness data of the adhesive tape 8 is obtained, and the thickness data is also transmitted to the computer;

[0046] Step 4, five laser rangefinder probes 207 obtain five substrate 3 thickness data from left to right in the determined area, and five laser thickness gauge probes 9 obtain five tape 8 thickness data from left to right in the determined area. The computer subtracts the corresponding five substrate 3 thickness data from the five tape 8 thickness data in turn to obtain five hot melt adhesive thicknesses after coating in the determined area of ​​the substrate 3. The hot melt adhesive thicknesses after coating in multiple different determined areas can obtain hot melt adhesive amount change data, and personnel can adjust the adhesive output of the coating machine according to the hot melt adhesive thickness change data.

[0047] Working principle: first measure five thickness data from left to right of a determined area of ​​substrate 3, and then measure five thickness data from left to right of tape 8 after coating the determined area of ​​substrate 3. The computer subtracts the corresponding five thickness data of substrate 3 from the five thickness data of tape 8 in turn to obtain the five hot melt adhesive thicknesses from left to right after coating the determined area of ​​substrate 3. The hot melt adhesive thicknesses after coating of multiple different determined areas can obtain the hot melt adhesive amount change data. Personnel can adjust the adhesive output of the coater according to the hot melt adhesive thickness change data. For example, if the hot melt adhesive thickness on the left is higher and exceeds the set value, personnel can reduce the adhesive output on the left side of the coater, thereby achieving stable production of tape 8 and improving the production efficiency of tape 8.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online thickness measuring device, comprising a first thickness measuring component (1), characterized in that: The invention also comprises a second thickness measuring component (6), wherein a substrate (3) is arranged inside the first thickness measuring component (1), an adhesive tape (8) is arranged inside the second thickness measuring component (6), the substrate (3) is connected to the adhesive tape (8), a fixing box (2) is arranged above the first thickness measuring component (1), a measuring roller (4) and a lifting roller (103) are arranged inside the first thickness measuring component (1), a laser rangefinder probe (207) is arranged inside the fixing box (2), a roller (204) is arranged below the fixing box (2), laser thickness gauge probes (9) are arranged above and below the adhesive tape (8), a laser emitting end of the laser thickness gauge probe (9) faces the surface of the adhesive tape (8), and a cooling chamber (5) is arranged on one side of the second thickness measuring component (6).

2. An online thickness measuring device according to claim 1, characterized in that: A first guide roller (102) is arranged inside the first thickness measuring component (1), the first guide roller (102) is located below the lifting roller (103), the measuring roller (4) is located between the two lifting rollers (103), and the substrate (3) passes through the first guide roller (102), the lifting roller (103) and the measuring roller (4) in sequence along the moving direction of the substrate (3).

3. The online thickness measuring device according to claim 1, characterized in that: Both ends of the measuring roller (4) are provided with a first mounting plate (101); a U-shaped seat (105) is provided below the lifting roller (103); a first sliding block (106) is provided on the side of the U-shaped seat (105); a first slideway (104) is provided on one side of the U-shaped seat (105); a first telescopic rod (107) is provided below the U-shaped seat (105); the first slideway (104) is installed on the first mounting plate (101); and the first sliding block (106) is located inside the first slideway (104).

4. The online thickness measuring device according to claim 1, characterized in that: A motor (401) is provided at one end of the measuring roller (4), a cleaning roller (402) is provided below the measuring roller (4), a cleaning brush is provided on the side of the cleaning roller (402), the cleaning brush contacts the side of the measuring roller (4), and the substrate (3) passes between the measuring roller (4) and the roller (204).

5. The online thickness measuring device according to claim 1, characterized in that: A cross bar (201) is provided on one side of the fixing box (2), and second telescopic rods (202) are provided at both ends of the cross bar (201). A limiting block (203) is provided on one side of the second telescopic rod (202), and both ends of the second telescopic rod (202) are respectively connected to the cross bar (201) and the first mounting plate (101), the lower end of the limiting block (203) is connected to the first mounting plate (101), and the cross bar (201) is screw-connected to the fixing box (2).

6. The online thickness measuring device according to claim 1, characterized in that: The fixed box (2) is a rectangular parallelepiped structure with an open lower end. A guide column (206) is arranged inside the fixed box (2). A movable plate (205) is arranged above the roller (204). The movable plate (205) is connected to the roller (204) via a column. The roller (204) is axially connected to the lower end of the column. The upper end of the guide column (206) is connected to the inner top surface of the fixed box (2). The lower end of the guide column (206) passes through the movable plate (205) and extends to the open end of the fixed box (2). A stopper (2061) is arranged at the lower end of the guide column (206).

7. The online thickness measuring device according to claim 1, characterized in that: An air pump (501) is arranged above the cooling chamber (5), a cold air chamber (7) is arranged below the cooling chamber (5), a second guide roller (502) is arranged inside the cooling chamber (5), a third guide roller (602) is arranged inside the second thickness measuring assembly (6), second mounting plates (601) are arranged at both ends of the third guide roller (602), and a first support column (903) and a second support column (905) are arranged inside the two second mounting plates (601), respectively.

8. An online thickness measuring device according to claim 7, characterized in that: A second slideway (902) is arranged between the first support column (903) and the second support column (905); a third slideway (904) is arranged inside the first support column (903); a positioning groove (906) is arranged inside the second support column (905); one end of the second slideway (902) is located inside the third slideway (904); the other end of the second slideway (902) passes through the positioning groove (906); a second slider (901) is arranged inside the second slideway (902); and the laser thickness gauge probe (9) is installed on the second slider (901).

9. An online thickness measuring device according to claim 8, characterized in that: A screw rod (907) is provided on one side of the second support column (905), and the screw rod (907) is connected to the shaft of the second support column (905). A turntable is provided at the upper end of the screw rod (907). At least two second slideways (902) are provided, and the two second slideways (902) are both threadedly connected to the screw rod (907). Along the moving direction of the adhesive tape (8), the adhesive tape (8) passes through the cooling chamber (5), the second guide roller (502), the third guide roller (602) and the two second slideways (902) in sequence. A fan (703) is provided inside the cold air chamber (7), and a grille (704) is provided on the top of the cold air chamber (7). A filter chamber (701) and a cold air duct (702) are provided on the side of the cold air chamber (7), and the grille (704) is located inside the cooling chamber (5).

10. An online thickness measurement method, implemented based on an online thickness measurement device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: at least five control boxes (2) are installed on the crossbar (201), the distance between each control box (2) is equal, at least five laser thickness gauge probes (9) are fixed inside the upper and lower second slideways (902), the distance between each laser thickness gauge probe (9) is equal, and the control boxes (2) and the laser thickness gauge probes (9) correspond to each other; Step 2: firstly, the height of the lifting roller (103) is adjusted by the first telescopic rod (107) until the measuring roller (4) is slightly higher than the lifting rollers (103) on both sides, and then the height of the fixing box (2) is adjusted by the second telescopic rod (202) until the roller (204) is in contact with the lifting roller (103); Step 3: The substrate (3) first passes through the first thickness measuring component (1), then passes through the coating machine, and finally passes through the cooling chamber (5) and the second thickness measuring component (6) in sequence, wherein when the substrate (3) passes through the roller (204) and the lifting roller (103), the movable plate (205) rises along the guide column (206), and the laser rangefinder probe (207) collects the displacement data of the movable plate (205) and transmits it to the computer. After the substrate (3) is coated by the coating machine, it becomes an adhesive tape (8). When the adhesive tape (8) passes between the upper and lower sets of laser thickness gauge probes (9), the thickness data of the adhesive tape (8) is obtained, and the thickness data is also transmitted to the computer; Step 4: The computer uses the thickness data to subtract the corresponding displacement data to obtain the thickness of the hot melt adhesive after coating the substrate (3). The personnel adjust the glue output of the coating machine according to the change in the thickness of the hot melt adhesive.

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