Protective film detection system and detection method

Abstract

The invention belongs to the technical field of thickness measurement, and particularly relates to a protective film detection system and method, and the system comprises a control module, two first laser ranging devices, two second laser ranging devices, and two photosensitive devices. The first laser distance measuring device and the second laser distance measuring device are matched to detect the thickness of any position on the protective film, so that the device can adapt to the protective film in the moving process, and the actual detection position on the protective film is consistent with the set detection position; meanwhile, the two first laser distance measuring devices and the two second laser distance measuring devices are matched with each other, so that the protective film can be scanned in a staggered linear manner, that is, detection positions are uniformly distributed in any area on the protective film, and the overall quality of the protective film is accurately reflected; and the light sensing device can capture the refraction drop point position of the laser penetrating through the protective film, and meanwhile, the refractive index of the protective film is detected.

Description

Technical Field

[0001] The present invention belongs to the technical field of thickness measurement, and in particular relates to a device for thickness measurement, and specifically relates to a protective film detection system and a detection method. Background Art

[0002] Traditional laser thickness gauges or ultrasonic thickness gauges test the thickness of materials at fixed points. However, during the preparation process of the protective film, the protective film needs to be rolled up or conveyed. Traditional laser thickness gauges or ultrasonic thickness gauges can only test at fixed points. On the one hand, this leads to less measurement data for the protective film. On the other hand, there is an offset between the set measurement position on the protective film and the actual measurement position.

[0003] Therefore, it is urgent to develop a new protective film detection system and detection method to solve the technical problem that traditional thickness measuring equipment cannot accurately reflect the overall quality of the protective film due to fixed-point measurement during the movement of the protective film.

[0004] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0005] The embodiments of the present disclosure at least provide a protective film detection system and a detection method.

[0006] In a first aspect, an embodiment of the present disclosure provides a protective film detection system, which includes: a control module, two first laser ranging devices, two second laser ranging devices and two photosensitive devices; wherein the two photosensitive devices are arranged in parallel and longitudinally, and the two first laser ranging devices and the two second laser ranging devices are located between the two photosensitive devices; the protective film passes between the two first laser ranging devices and the two second laser ranging devices, the control module is configured to drive the two first laser ranging devices to rotate toward or away from each other, and the control module is also configured to drive the corresponding first laser ranging device and the second laser ranging device to rotate synchronously, so that the first laser ranging device and the second laser ranging device successively emit lasers to the same point on the protective film, and then the control module is also configured to capture the common point position through the corresponding photosensitive device to obtain the thickness of the protective film, and form an interlaced linear scanning of the protective film within one rotation cycle; and when the laser is refracted through the protective film to the corresponding photosensitive device, the control module determines the refractive index of the protective film by the position of the refracted landing point.

[0007] In an optional embodiment, when the lasers emitted by the two first laser ranging devices or the two second laser ranging devices land closest to the protective film, the control module detects the thickness of the protective film through two groups of first laser ranging devices and second laser ranging devices respectively to determine the status of the two first laser ranging devices and the two second laser ranging devices.

[0008] In an optional embodiment, the protective film detection system further includes: two mounting bars; the two mounting bars are arranged in parallel and transversely, the two first laser ranging devices are respectively installed on one of the mounting bars, and the two second laser ranging devices are respectively installed on the other mounting bar.

[0009] In an optional embodiment, the first laser ranging device includes: a first rotating member and a first laser emitter; the two first laser emitters are staggered so that the lasers emitted by the two first laser emitters are staggered when they rotate towards each other; the control module is configured to drive the first rotating member to drive the first laser emitter to rotate, so that the laser emitted by the first laser emitter forms a linear scanning protective film within one rotation cycle.

[0010] In an optional embodiment, the second laser ranging device includes: a second rotating member and a second laser emitter; the two second laser emitters are staggered so that the lasers emitted by the two second laser emitters are staggered when they rotate towards each other; the control module is configured to drive the second rotating member to drive the second laser emitter to rotate, so that the laser emitted by the second laser emitter forms a linear scanning protective film within one rotation cycle.

[0011] In an optional embodiment, the photosensitive device includes: a photosensitive strip and two depth cameras; the two depth cameras are respectively located at both ends of the photosensitive strip; the control module is also configured to obtain, through the corresponding depth cameras, the distance from the first laser ranging device to the upper surface of the protective film corresponding to the common point position, the rotation angle of the first laser ranging device, the distance from the second laser ranging device to the lower surface of the protective film corresponding to the common point position, and the rotation angle of the second laser ranging device in the same group of first laser ranging devices and second laser ranging devices, and then the control module is also configured to obtain the vertical distance between the first laser ranging device and the upper surface of the protective film and the vertical distance between the second laser ranging device and the lower surface of the protective film, and finally obtain the thickness of the protective film at the common point position.

[0012] In an optional embodiment, a fluorescent layer is coated on the photosensitive strip; the control module is also configured to obtain the refraction position of the laser on the protective film and the actual refraction landing point position on the fluorescent layer through a corresponding depth camera, and then the control module is also configured to obtain the theoretical refraction landing point position of the laser on the fluorescent layer through the refraction position of the laser on the protective film and the theoretical refractive index of the protective film, so as to compare whether the actual refraction landing point position is consistent with the theoretical refraction landing point position, and judge that the refractive index of the protective film is abnormal when the two are inconsistent.

[0013] In an optional embodiment, a photoresistor array is arranged along the length direction of the photosensitive strip; the control module is also configured to obtain the refraction position of the laser on the protective film and the actual refraction landing point position on the photoresistor array through a corresponding depth camera, and then the control module is also configured to obtain the theoretical refraction landing point position of the laser on the photoresistor array through the refraction position of the laser on the protective film and the theoretical refractive index of the protective film, so as to compare whether the actual refraction landing point position is consistent with the theoretical refraction landing point position, and judge that the refractive index of the protective film is abnormal when the two are inconsistent.

[0014] In an optional embodiment, the two first laser ranging devices and the two second laser ranging devices form a group of ranging units, and the two groups of ranging units are arranged side by side so that the two groups of ranging units work alternately.

[0015] In a second aspect, the disclosed embodiment also provides a detection method, which includes: a first laser ranging device and a second laser ranging device successively emit lasers to the same point on the protective film, and then the control module is configured to capture the common point position through the corresponding photosensitive device to obtain the thickness of the protective film, and form an interlaced linear scan of the protective film within one rotation cycle; when the laser is refracted through the protective film to the corresponding photosensitive device, the control module determines the refractive index of the protective film through the position of the refracted landing point; when the lasers emitted by the two first laser ranging devices or the two second laser ranging devices land on the protective film closest to each other, the control module detects the thickness of the protective film through two groups of first laser ranging devices and second laser ranging devices respectively to determine the status of the two first laser ranging devices and the two second laser ranging devices.

[0016] The beneficial effect of the present invention is that the present invention can adapt to the protective film in motion by detecting the thickness of any position on the protective film through the cooperation of the first laser ranging device and the second laser ranging device, so as to achieve the consistency between the actual detection position on the protective film and the set detection position. At the same time, the two first laser ranging devices cooperate with each other and the two second laser ranging devices cooperate with each other, so as to achieve staggered linear scanning of the protective film, that is, evenly distribute the detection positions in any area on the protective film, so as to accurately reflect the overall quality of the protective film, and the photosensitive device can capture the refraction landing point position of the laser through the protective film, and at the same time, the refractive index of the protective film can be detected.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A structural diagram of a protective film detection system provided in an embodiment of the present disclosure; Figure 2 A principle block diagram of a protective film detection system provided by an embodiment of the present disclosure; Figure 3 A structural diagram of a first laser distance measuring device and a second laser distance measuring device provided in an embodiment of the present disclosure; Figure 4 A structural diagram of a first laser ranging device provided in an embodiment of the present disclosure; Figure 5 A schematic diagram of laser scanning on a protective film is provided for an embodiment of the present disclosure; Figure 6 A schematic diagram of detecting thickness at any position on a protective film is provided for an embodiment of the present disclosure; Figure 7 A schematic diagram of detecting the refractive index at any position on the protective film is provided for the embodiment of the present disclosure.

[0021] In the figure: 1. First laser distance measuring device; 11. First rotating member; 12. First laser transmitter; 121. First installation schematic line; 122. Second installation schematic line; 123. First scanning line; 124. Second scanning line; 125. Closest point; 2. A second laser distance measuring device; 21. A second rotating member; 22. A second laser transmitter; 3. Photosensitive device; 31. Photosensitive strip; 4. Installation strip; 5. Protective film. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0023] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0024] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0025] Research has found that traditional thickness measuring equipment tests the thickness of the material at a certain point. During the protective film production process, a device is needed that can detect the thickness of the protective film at each position and provide real-time feedback. However, traditional thickness measuring equipment detects the thickness of the protective film in a point-like manner, which obviously cannot meet the thickness measurement requirements.

[0026] Based on the above research, the embodiments of the present disclosure provide a protective film detection system and detection method, which can not only scan the protective film in an interlaced linear manner to measure the thickness under different conditions, but also detect the refractive index of the protective film in real time, and can verify its own detection status during the detection process to ensure the accuracy of the measurement results.

[0027] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure for the above problems below should be the contributions made by the inventor to the present disclosure during the disclosure process.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] like Figures 1 to 7 As shown, at least one embodiment provides a protective film detection system, which includes: a control module, two first laser distance measuring devices 1, two second laser distance measuring devices 2 and two photosensitive devices 3; wherein the two photosensitive devices 3 are arranged in parallel and longitudinally, and the two first laser distance measuring devices 1 and the two second laser distance measuring devices 2 are located between the two photosensitive devices 3; the protective film 5 passes through between the two first laser distance measuring devices 1 and the two second laser distance measuring devices 2, and the control module is configured to drive the two first laser distance measuring devices 1 to rotate toward or away from each other, and the control module is also configured In order to drive the corresponding first laser ranging device 1 and the second laser ranging device 2 to rotate synchronously, so that the first laser ranging device 1 and the second laser ranging device 2 successively emit lasers to the same point on the protective film 5, the control module is also configured to capture the common point position through the corresponding photosensitive device 3 to obtain the thickness of the protective film 5, and form an interlaced linear scanning of the protective film 5 within one rotation cycle; and when the laser is refracted through the protective film 5 to the corresponding photosensitive device 3, the control module determines whether the refractive index of the protective film 5 is normal through the position of the refracted landing point.

[0031] Specifically, the protective film 5 is an upper and lower protective film for OLED (Organic Light-Emitting Diode).

[0032] In at least one embodiment, the first laser ranging device 1 cooperates with the second laser ranging device 2 to detect the thickness at any position on the protective film 5, which can adapt to the protective film 5 in motion and achieve consistency between the actual detection position on the protective film 5 and the set detection position. At the same time, the two first laser ranging devices 1 cooperate with each other and the two second laser ranging devices 2 cooperate with each other to achieve staggered linear scanning of the protective film 5, that is, the detection positions are evenly distributed in any area on the protective film 5, so as to accurately reflect the overall quality of the protective film 5, and the photosensitive device 3 can capture the refracted landing point position of the laser through the protective film 5, and at the same time, the refractive index of the protective film 5 can be detected.

[0033] In at least one embodiment, see Figure 5 When the lasers emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 land closest to the protective film 5, the control module detects the thickness of the protective film 5 through the two groups of first laser ranging devices 1 and second laser ranging devices 2 respectively to determine whether the two first laser ranging devices 1 and the two second laser ranging devices 2 are normal.

[0034] Specifically, when the lasers emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 land closest on the protective film 5, theoretically, the thickness of the protective film 5 detected by the two groups of first laser ranging devices 1 and the second laser ranging devices 2 should be consistent. If the thickness of the protective film 5 detected by the two groups of first laser ranging devices 1 and the second laser ranging devices 2 are consistent, it is judged that the two first laser ranging devices 1 and the two second laser ranging devices 2 are working normally. If the thickness of the protective film 5 detected by the two groups of first laser ranging devices 1 and the second laser ranging devices 2 are inconsistent, it is judged that the two first laser ranging devices 1 and the two second laser ranging devices 2 are abnormal, and the two first laser ranging devices 1 and the two second laser ranging devices 2 are repaired.

[0035] Specifically, see Figure 5 The lasers emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 respectively form a first scanning line 123 and a second scanning line 124 on the protective film 5, and since the first laser ranging device 1 and the second laser ranging device 2 successively emit lasers to the same point on the protective film 5, although the first scanning line 123 and the second scanning line 124 have an intersection point, in fact, the two lasers do not intersect, but the intersection point formed by the first scanning line 123 and the second scanning line 124 is used as the closest point 125, that is, the lasers emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 are closest to the landing point on the protective film 5.

[0036] In at least one embodiment, see Figure 1 The protective film 5 detection system also includes: two mounting bars 4; the two mounting bars 4 are parallel and horizontally arranged, the two first laser ranging devices 1 are respectively installed on one of the mounting bars 4, and the two second laser ranging devices 2 are respectively installed on the other mounting bar 4.

[0037] Specifically, the mounting bar 4 plays the role of mounting and positioning, and can realize the mounting of the first laser ranging device 1 and the second laser ranging device 2 , and simultaneously position the first laser ranging device 1 and the second laser ranging device 2 .

[0038] In at least one embodiment, see Figure 3 , Figure 4 The first laser ranging device 1 includes: a first rotating member 11 and a first laser emitter 12; the two first laser emitters 12 are staggered so that the lasers emitted by the two first laser emitters 12 are staggered when they rotate towards each other; the control module is configured to drive the first rotating member 11 to drive the first laser emitter 12 to rotate, so that the laser emitted by the first laser emitter 12 forms a linear scanning protective film 5 within one rotation cycle.

[0039] Specifically, the first rotating member 11 may be a rotating motor to drive the first laser emitter 12 to rotate.

[0040] Specifically, the first rotating member 11 drives the first laser emitter 12 to rotate along the direction F1.

[0041] Specifically, the first rotating member 11 is mounted with the first laser emitter 12 via a connecting column, and the first rotating member 11 itself can collect the rotation angle of the first laser emitter 12 .

[0042] Specifically, a posture acquisition device is arranged on the first rotating member 11 to ensure accurate acquisition of the rotation angle of the first laser emitter 12 .

[0043] Specifically, see Figure 4 One first laser emitter 12 corresponds to the first installation schematic line 121, and the other first laser emitter 12 corresponds to the second installation schematic line 122, so that the two first laser emitters 12 can be staggered to avoid interference between the two first laser emitters 12 when they rotate towards each other.

[0044] In at least one embodiment, see Figure 3The second laser ranging device 2 includes: a second rotating member 21 and a second laser emitter 22; the two second laser emitters 22 are staggered so that the lasers emitted by the two second laser emitters 22 are staggered when they rotate towards each other; the control module is configured to drive the second rotating member 21 to drive the second laser emitter 22 to rotate, so that the laser emitted by the second laser emitter 22 forms a linear scanning protective film 5 within one rotation cycle.

[0045] Specifically, the second rotating member 21 may be a rotating motor to drive the second laser emitter 22 to rotate.

[0046] Specifically, the second rotating member 21 drives the first laser emitter 12 to rotate along the direction F1.

[0047] Specifically, the second rotating member 21 is mounted with the second laser emitter 22 via a connecting column, and the second rotating member 21 itself can collect the rotation angle of the second laser emitter 22 .

[0048] Specifically, a posture acquisition device is arranged on the second rotating member 21 to ensure accurate acquisition of the rotation angle of the second laser emitter 22 .

[0049] In at least one embodiment, the photosensitive device 3 includes: a photosensitive strip 31 and two depth cameras; the two depth cameras are respectively located at the two ends of the photosensitive strip 31; the control module is also configured to obtain, through the corresponding depth cameras, the distance from the first laser ranging device 1 to the upper surface of the protective film 5 corresponding to the common point position, the rotation angle of the first laser ranging device 1, the distance from the second laser ranging device 2 to the lower surface of the protective film 5 corresponding to the common point position, and the rotation angle of the second laser ranging device 2 in the same group of first laser ranging devices 1 and second laser ranging devices 2, and then the control module is also configured to obtain the vertical distance between the first laser ranging device 1 and the upper surface of the protective film 5 and the vertical distance between the second laser ranging device 2 and the lower surface of the protective film 5, and finally obtain the thickness of the protective film 5 at the common point position.

[0050] Specifically, the depth camera can obtain the three-dimensional coordinates of the target point.

[0051] Specifically, see Figure 6, the three-dimensional coordinates of the first laser ranging device 1 are known, and the laser is irradiated on the protective film 5, so that the corresponding three-dimensional coordinates can be obtained, that is, the distance S1 from the first laser ranging device 1 to the upper surface of the protective film 5 corresponding to the common point position can be obtained, and the rotation angle α of the first laser ranging device 1 is known, and the distance S2 from the second laser ranging device 2 to the lower surface of the protective film 5 corresponding to the common point position is obtained. At the same time, the rotation angle β of the second laser ranging device 2 is known, and then the vertical distance S3 between the first laser ranging device 1 and the upper surface of the protective film 5 and the vertical distance S4 between the second laser ranging device 2 and the lower surface of the protective film 5 can be calculated. At the same time, the distance between the first laser ranging device 1 and the second laser ranging device 2 is known. Finally, the distance between the first laser ranging device 1 and the second laser ranging device 2 is subtracted from S3 and S4 to obtain the thickness of the protective film 5 at the common point position.

[0052] In at least one embodiment, the photosensitive strip 31 is coated with a fluorescent layer; the control module is also configured to obtain the refraction position of the laser on the protective film 5 and the actual refraction landing point position on the fluorescent layer through a corresponding depth camera, and then the control module is also configured to obtain the theoretical refraction landing point position of the laser on the fluorescent layer through the refraction position of the laser on the protective film 5 and the theoretical refractive index of the protective film 5, so as to compare the actual refraction landing point position with the theoretical refraction landing point position to determine whether the refractive index of the protective film 5 is normal.

[0053] Specifically, see Figure 7 The depth camera can obtain the three-dimensional coordinates of the refraction position a of the laser on the protective film 5 and the three-dimensional coordinates of the actual refraction point position b on the fluorescent layer, and because the refractive index of the protective film 5 itself is known, the three-dimensional coordinates of the theoretical refraction point position c of the laser on the fluorescent layer can be calculated. By comparing the actual refraction point position b with the theoretical refraction point position c, if the two are consistent, the refractive index of the protective film 5 is normal, if the two are inconsistent, the refractive index of the protective film 5 is abnormal.

[0054] In at least one embodiment, a photoresistor array is arranged along the length direction of the photosensitive strip 31; the control module is also configured to obtain the refraction position of the laser on the protective film 5 and the actual refraction landing point position on the photoresistor array through the corresponding depth camera, and then the control module is also configured to obtain the theoretical refraction landing point position of the laser on the photoresistor array through the refraction position of the laser on the protective film 5 and the theoretical refractive index of the protective film 5, so as to compare the actual refraction landing point position with the theoretical refraction landing point position to determine whether the refractive index of the protective film 5 is normal.

[0055] Specifically, see Figure 7The depth camera can obtain the three-dimensional coordinates of the refraction position a of the laser on the protective film 5, and the photoresistor array can obtain the three-dimensional coordinates of the actual refraction landing point position b. Since the refractive index of the protective film 5 itself is known, the three-dimensional coordinates of the theoretical refraction landing point position c of the laser on the photoresistor array can be calculated. By comparing the actual refraction landing point position b with the theoretical refraction landing point position c, if the two are consistent, the refractive index of the protective film 5 is normal. If the two are inconsistent, the refractive index of the protective film 5 is abnormal.

[0056] In at least one embodiment, the two first laser ranging devices 1 and the two second laser ranging devices 2 form a group of ranging units, and the two groups of ranging units are arranged side by side so that the two groups of ranging units work alternately.

[0057] Specifically, when the two groups of distance measuring units work alternately, the resetting time of the rotating part can be omitted, thereby achieving uninterrupted detection of the protective film 5.

[0058] Based on the same technical concept, at least one embodiment also provides a detection method, which includes: a first laser ranging device 1 and a second laser ranging device 2 successively emit lasers to the same point on the protective film 5, and then the control module is configured to capture the common point position through the corresponding photosensitive device 3 to obtain the thickness of the protective film 5, and form an interlaced linear scan of the protective film 5 within one rotation cycle.

[0059] Based on the same technical concept, at least one embodiment further provides a detection method, which includes: when the laser is refracted through the protective film 5 to the corresponding photosensitive device 3, the control module determines whether the refractive index of the protective film 5 is normal according to the position of the refracted landing point.

[0060] Based on the same technical concept, at least one embodiment also provides a detection method, which includes: when the lasers emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 land on the protective film 5 closest to each other, the control module detects the thickness of the protective film 5 through two groups of first laser ranging devices 1 and second laser ranging devices 2 respectively to determine whether the two first laser ranging devices 1 and the two second laser ranging devices 2 are normal.

[0061] In summary, the present invention detects the thickness of any position on the protective film through the cooperation of the first laser ranging device and the second laser ranging device, which can adapt to the protective film in the process of movement, and realize the consistency between the actual detection position on the protective film and the set detection position. At the same time, the two first laser ranging devices cooperate with each other and the two second laser ranging devices cooperate with each other, which can realize staggered linear scanning of the protective film, that is, the various detection positions are evenly distributed in any area on the protective film, so as to accurately reflect the overall quality of the protective film, and the photosensitive device can capture the refracted landing point position of the laser through the protective film, and realize the detection of the refractive index of the protective film.

[0062] The disclosure and other solutions, examples, embodiments, modules and functional operations described in this document can be implemented in digital electronic circuits, or computer software, firmware or hardware, including the structures disclosed in this document and their structural equivalents, or a combination of one or more thereof. The disclosure and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a tangible and non-volatile computer-readable medium for execution by a data processing device or to control the operation of the data processing device. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a material composition that affects a machine-readable propagation signal, or a combination of one or more thereof. The term "data processing unit" or "data processing device" includes all devices, equipment and machines for processing data, including, for example, a programmable processor, a computer or a multiprocessor or a computer group. In addition to hardware, the device may also include code that creates an execution environment for a computer program, for example, code constituting processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more thereof. A propagated signal is an artificially generated signal, for example, a machine-generated electrical, optical or electromagnetic signal, which is generated to encode information for transmission to a suitable receiver device.

[0063] A computer program (also referred to as a program, software, software application, script, or code) may be written in any form of programming language (including compiled or interpreted languages) and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program may be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program, or in multiple coordinated files (e.g., files that store one or more modules, subroutines, or portions of code). A computer program may be deployed for execution on one or more computers that are located at one site or distributed across multiple sites and interconnected by a communications network.

[0064] The processes and logic flows described in this document may be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows may also be performed by, and the apparatus may also be implemented as, special purpose logic circuits, such as an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).

[0065] For example, processors suitable for executing computer programs include general and special purpose microprocessors, and any one or more of any type of digital computer. Typically, the processor will receive instructions and data from a read-only memory or a random access memory or both. The basic components of a computer are a processor that executes instructions and one or more storage devices that store instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or operably coupled to receive data from a mass storage device or transfer data to a mass storage device, or both. However, a computer does not necessarily have such a device. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices, such as erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and compact disk read-only memory (CD ROM) and digital versatile disk read-only memory (DVD-ROM) disks. The processor and memory can be supplemented by dedicated logic circuits, or incorporated in dedicated logic circuits.

[0066] Although this patent document contains many details, they should not be construed as limitations on the scope of any invention or the claims, but rather as descriptions of features of particular embodiments of particular inventions. Certain features described in this patent document in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various functions described in the context of a single embodiment may also be implemented separately in multiple embodiments, or in any suitable subcombination. In addition, although the above-mentioned features may be described as working in certain combinations, or even initially claimed to be so, in some cases, one or more features in the claim combination may be removed from the combination, and the claim combination may be directed to subcombinations or variations of subcombinations.

[0067] Likewise, although operations are described in a particular order in the drawings, this should not be understood as requiring that such operations be performed in the particular order or order shown, or that all illustrated operations be performed, in order to achieve the desired results. In addition, the separation of various system components in the embodiments of this patent document should not be understood as requiring such separation in all embodiments.

[0068] Only a few implementations and examples are described, and other implementations, enhancements, and variations can be made based on what is described and illustrated in this patent document.

[0069] A first component is directly coupled to a second component when there are no intermediate components other than a line, trace, or another medium between the first component and the second component. A first component is indirectly coupled to a second component when there are intermediate components other than a line, trace, or another medium between the first component and the second component. The term "coupled" and its variations include direct coupling and indirect coupling. Unless otherwise specified, the use of the term "about" is meant to include a range of 10% above and below the value.

[0070] Although several embodiments are provided in the present disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of the present disclosure. The present examples are considered to be illustrative rather than restrictive and are not limited to the details given. For example, various elements or components may be combined or integrated in another system, or certain features may be omitted or not implemented.

[0071] In several embodiments provided herein, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0072] In addition, without departing from the scope of the present disclosure, the discrete or separate techniques, systems, subsystems, and methods described and illustrated in the various embodiments may be combined or integrated with other systems, modules, techniques, or methods. Other items shown or discussed as coupled may be directly connected, or may be indirectly coupled or communicated electrically, mechanically, or otherwise through some interface, device, or intermediate component. Other examples of changes, substitutions, and alterations may be determined by those skilled in the art without departing from the spirit and scope disclosed herein.

Claims

1. A protective film detection system, characterized in that: include: A control module, two first laser distance measuring devices (1), two second laser distance measuring devices (2) and two photosensitive devices (3); wherein The two photosensitive devices (3) are arranged in parallel and longitudinally, and the two first laser distance measuring devices (1) and the two second laser distance measuring devices (2) are located between the two photosensitive devices (3); The protective film (5) passes between the two first laser distance measuring devices (1) and the two second laser distance measuring devices (2), the control module is configured to drive the two first laser distance measuring devices (1) to rotate towards or away from each other, and the control module is further configured to drive the corresponding first laser distance measuring device (1) and the second laser distance measuring device (2) to rotate synchronously, so that the first laser distance measuring device (1) and the second laser distance measuring device (2) successively emit lasers to the same point on the protective film (5), and then the control module is further configured to capture the common point position through the corresponding photosensitive device (3) to obtain the thickness of the protective film (5), and form a staggered linear scanning of the protective film (5) within one rotation cycle; and When the laser light passes through the protective film (5) and is refracted onto the corresponding photosensitive device (3), the control module determines the refractive index of the protective film (5) based on the position of the refracted landing point.

2. The protective film detection system according to claim 1, characterized in that: When the lasers emitted by the two first laser distance measuring devices (1) or the two second laser distance measuring devices (2) land closest to each other on the protective film (5), the control module detects the thickness of the protective film (5) through the two sets of first laser distance measuring devices (1) and second laser distance measuring devices (2) respectively, so as to determine the states of the two first laser distance measuring devices (1) and the two second laser distance measuring devices (2).

3. The protective film detection system according to claim 1, characterized in that: Also includes: two mounting strips (4); The two mounting bars (4) are arranged in parallel and transversely, the two first laser distance measuring devices (1) are respectively mounted on one of the mounting bars (4), and the two second laser distance measuring devices (2) are respectively mounted on the other mounting bar (4).

4. The protective film detection system according to claim 1, characterized in that: The first laser distance measuring device (1) comprises: a first rotating member (11) and a first laser emitter (12); The two first laser emitters (12) are staggered so that the lasers emitted by the two first laser emitters (12) are staggered when they rotate towards each other; The control module is configured to drive the first rotating member (11) to drive the first laser emitter (12) to rotate, so that the laser light emitted by the first laser emitter (12) forms a linear scanning protective film (5) within one rotation cycle.

5. The protective film detection system according to claim 1, characterized in that: The second laser distance measuring device (2) comprises: a second rotating member (21) and a second laser emitter (22); The two second laser emitters (22) are staggered so that the lasers emitted by the two second laser emitters (22) are staggered when they rotate towards each other; The control module is configured to drive the second rotating member (21) to drive the second laser emitter (22) to rotate, so that the laser light emitted by the second laser emitter (22) forms a linear scanning protective film (5) within one rotation cycle.

6. The protective film detection system according to claim 1, characterized in that: The photosensitive device (3) comprises: a photosensitive strip (31) and two depth cameras; The two depth cameras are respectively located at two ends of the photosensitive strip (31); The control module is further configured to obtain, through a corresponding depth camera, the distance from the first laser distance measuring device (1) to the upper surface of the protective film (5) corresponding to the common point position, the rotation angle of the first laser distance measuring device (1), the distance from the second laser distance measuring device (2) to the lower surface of the protective film (5) corresponding to the common point position, and the rotation angle of the second laser distance measuring device (2) in the same group of the first laser distance measuring device (1) and the second laser distance measuring device (2), and further the control module is further configured to obtain the vertical distance between the first laser distance measuring device (1) and the upper surface of the protective film (5) and the vertical distance between the second laser distance measuring device (2) and the lower surface of the protective film (5), and finally obtain the thickness of the protective film (5) at the common point position.

7. The protective film detection system according to claim 6, characterized in that: The photosensitive strip (31) is coated with a fluorescent layer; The control module is further configured to obtain the refraction position of the laser on the protective film (5) and the actual refraction landing point position on the fluorescent layer through a corresponding depth camera, and further the control module is further configured to obtain the theoretical refraction landing point position of the laser on the fluorescent layer through the refraction position of the laser on the protective film (5) and the theoretical refractive index of the protective film (5), so as to compare whether the actual refraction landing point position and the theoretical refraction landing point position are consistent, and to determine that the refractive index of the protective film (5) is abnormal when the two are inconsistent.

8. The protective film detection system according to claim 6, characterized in that: A photoresistor array is arranged on the photosensitive strip (31) along the length direction; The control module is further configured to obtain the refraction position of the laser on the protective film (5) and the actual refraction landing position on the photoresistor array through a corresponding depth camera, and further the control module is further configured to obtain the theoretical refraction landing position of the laser on the photoresistor array through the refraction position of the laser on the protective film (5) and the theoretical refractive index of the protective film (5), so as to compare whether the actual refraction landing position is consistent with the theoretical refraction landing position, and to determine that the refractive index of the protective film (5) is abnormal when the two are inconsistent.

9. The protective film detection system according to claim 1, characterized in that: The two first laser distance measuring devices (1) and the two second laser distance measuring devices (2) form a group of distance measuring units, and the two groups of distance measuring units are arranged side by side so that the two groups of distance measuring units work alternately.

10. A detection method using the protective film detection system according to any one of claims 1 to 9, characterized in that: include: The first laser distance measuring device (1) and the second laser distance measuring device (2) successively emit lasers to the same point on the protective film (5), and then the control module is configured to capture the common point position through the corresponding photosensitive device (3) to obtain the thickness of the protective film (5), and form a staggered linear scan of the protective film (5) within one rotation cycle; When the laser passes through the protective film (5) and is refracted onto the corresponding photosensitive device (3), the control module determines the refractive index of the protective film (5) based on the position of the refracted landing point; When the lasers emitted by the two first laser distance measuring devices (1) or the two second laser distance measuring devices (2) are closest to the landing point on the protective film (5), the control module detects the thickness of the protective film (5) through the two sets of first laser distance measuring devices (1) and the second laser distance measuring devices (2) respectively, so as to determine the states of the two first laser distance measuring devices (1) and the two second laser distance measuring devices (2).

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