Protective Film Detection System and Detection Method

Abstract

The present invention belongs to the technical field of thickness measurement, and particularly relates to a protective film detection system and a detection method. The protective film detection system of the present invention includes: a control module, two first laser ranging devices, two second laser ranging devices, and two photosensitive devices; by cooperating the first laser ranging device and the second laser ranging device to detect the thickness at any position on the protective film, the present invention can adapt to the protective film during movement, realize that the actual detection position on the protective film is consistent with 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 line scanning of the protective film, that is, the detection positions are evenly distributed in any area of the protective film, accurately reflecting the overall quality of the protective film. And through the photosensitive device, the refraction landing point position of the laser passing through the protective film can be captured, and at the same time, the refractive index of the protective film can be 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 measure the thickness of materials at fixed points. However, during the preparation process of the protective film, the protective film is wound and unwound or conveyed. Traditional laser thickness gauges or ultrasonic thickness gauges can only perform fixed-point measurements. On the one hand, this results in fewer measurement data for the protective film. On the other hand, there is an offset between the set measurement position and the actual measurement position on the protective film.

[0003] Therefore, it is urgent to develop a new protective film detection system and detection method to solve the technical problem that traditional thickness measurement 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 art section is only used to understand the background art of the concept of this application. Therefore, the above description is not considered to constitute prior art information. 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, the embodiments of the present disclosure provide 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 through 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 towards or away from each other, and the control module is further 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 sequentially emit laser light to the same point on the protective film, and further the control module is configured to capture the co-point position through the corresponding photosensitive device to obtain the thickness of the protective film, and form an interleaved line scan of the protective film within one rotation period; and when the laser refracts through the protective film to the corresponding photosensitive device, the control module determines the refractive index situation of the protective film through the refraction landing point position.

[0007] In an alternative embodiment, when the laser spots emitted by the two first laser ranging devices or the two second laser ranging devices are closest on the protective film, the control module detects the thickness of the protective film through the two groups of first laser ranging devices and second laser ranging devices respectively to determine the states of the two first laser ranging devices and the two second laser ranging devices.

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

[0009] In an alternative embodiment, the first laser ranging device includes: a first rotating member and a first laser emitter; the two first laser emitters are arranged in a staggered manner so that the lasers emitted by the two first laser emitters are staggered when rotating 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 line scan of the protective film within one rotation period.

[0010] In an alternative embodiment, the second laser ranging device includes: a second rotating member and a second laser emitter; the two second laser emitters are arranged in a staggered manner so that the lasers emitted by the two second laser emitters are staggered when rotating 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 line scan of the protective film within one rotation period.

[0011] In an alternative embodiment, the light sensing device includes: a light sensing strip and two depth cameras; the two depth cameras are respectively located at both ends of the light sensing strip; the control module is further configured to obtain, through the corresponding depth camera, the distance from the first laser ranging device in the same group of first laser ranging devices and second laser ranging devices to the upper surface of the protective film at the co-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 at the co-point position, and the rotation angle of the second laser ranging device. Furthermore, the control module is further 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 co-point position.

[0012] In an alternative embodiment, a fluorescent layer is coated on the photosensitive strip; the control module is further configured to obtain the refraction position of the laser on the protective film and the actual refraction landing position on the fluorescent layer through the corresponding depth camera. Furthermore, the control module is further configured to obtain the theoretical refraction landing 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 position is consistent with the theoretical refraction landing position, and determine that the refractive index of the protective film is abnormal when the two are inconsistent.

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

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

[0015] In a second aspect, an embodiment of the present disclosure further provides a detection method, which includes: the first laser ranging device and the second laser ranging device successively emit lasers to the same point on the protective film. Furthermore, the control module is configured to capture the co-point position through the corresponding photosensitive device to obtain the thickness of the protective film, and form an interleaved line scan of the protective film within one rotation period; when the laser passes through the protective film and refracts to the corresponding photosensitive device, the control module determines the refractive index of the protective film through the refraction landing position; when the laser spots emitted by the two first laser ranging devices or the two second laser ranging devices on the protective film are the closest, the control module respectively detects the thickness of the protective film through the two sets of first laser ranging devices and second laser ranging devices to determine the states of the two first laser ranging devices and the two second laser ranging devices.

[0016] The beneficial effects of the present invention are as follows. By cooperating the first laser ranging device and the second laser ranging device to detect the thickness at any position on the protective film, it can adapt to the protective film during movement, achieving that the actual detection position on the protective film is consistent with 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, enabling staggered line scanning of the protective film, that is, evenly distributing the detection positions in any area of the protective film, accurately reflecting the overall quality of the protective film, and being able to capture the refraction landing point position of the laser passing through the protective film through the photosensitive device, while also detecting the refractive index of the protective film.

[0017] Other features and advantages of the present invention will be described in the following specification, and part of them will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0018] To make the above objectives, features, and advantages of the present invention more obvious and understandable, the following specifically provides preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Structural diagram of a protective film detection system provided by an embodiment of the present disclosure;

[0021] Figure 2 Principle block diagram of a protective film detection system provided by an embodiment of the present disclosure;

[0022] Figure 3 Structural diagram of a first laser ranging device and a second laser ranging device provided by an embodiment of the present disclosure;

[0023] Figure 4 Structural diagram of a first laser ranging device provided by an embodiment of the present disclosure;

[0024] Figure 5 Schematic diagram of laser scanning on the protective film provided by an embodiment of the present disclosure;

[0025] Figure 6 Schematic diagram of detecting the thickness at any position on the protective film provided by an embodiment of the present disclosure;

[0026] Figure 7Schematic diagram for detecting the refractive index at any position on the protective film provided by an embodiment of the present disclosure.

[0027] In the figure:

[0028] 1. First laser ranging device; 11. First rotating member; 12. First laser emitter; 121. First installation indication line; 122. Second installation indication line; 123. First scanning line; 124. Second scanning line; 125. Nearest point

[0029] 2. Second laser ranging device; 21. Second rotating member; 22. Second laser emitter

[0030] 3. Photosensitive device; 31. Photosensitive strip

[0031] 4. Installation strip

[0032] 5. Protective film Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] The terms used herein are only for describing specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an" and "the" may also be intended to include the plural forms, unless clearly stated otherwise herein. The terms "comprising", "including" and "having" are inclusive and thus specify the presence of the specified features, steps, operations, elements and / or components, but do not preclude 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 construed as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an order of execution. Additional or alternative steps may be employed.

[0035] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific feature, structure, or characteristic after the phrase can be included in at least one embodiment of the present disclosure. Thus, a specific feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, terms such as "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of terms such as "example", "exemplary", etc. is intended to present concepts in a concrete manner.

[0036] It has been found through research that traditional thickness measurement devices all measure the thickness of materials at a certain point. During the production process of the protective film, a device that can detect the thickness of each position of the protective film and can provide real-time feedback is required. However, traditional thickness measurement devices detect the thickness of the protective film in a point-like manner, which obviously cannot meet the thickness measurement requirements.

[0037] Based on the above research, embodiments of the present disclosure provide a protective film detection system and a detection method, which can scan the protective film in an interleaved line pattern for thickness measurement in different states, can simultaneously detect the refractive index of the protective film in real time, and can verify its own detection state during the detection process to ensure the accuracy of the measurement results.

[0038] All the defects existing in the above solutions are the results obtained by the inventors after practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed by the present disclosure in the following text for the above problems should be the contributions made by the inventors to the present disclosure during the process of the present disclosure.

[0039] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0041] As Figures 1 to 7As shown, at least one embodiment provides a protective film detection system, which includes: a control module, two first laser ranging devices 1, two second laser ranging devices 2, and two photosensitive devices 3; wherein the two photosensitive devices 3 are arranged in parallel and longitudinally, and the two first laser ranging devices 1 and the two second laser ranging devices 2 are located between the two photosensitive devices 3; the protective film 5 passes through between the two first laser ranging devices 1 and the two second laser ranging devices 2, and the control module is configured to drive the two first laser ranging devices 1 to rotate towards or away from each other, and the control module is further configured 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 laser to the same point on the protective film 5. Furthermore, the control module is further configured to capture the co-point position through the corresponding photosensitive device 3 to obtain the thickness of the protective film 5, and form an interleaved line scan of the protective film 5 within one rotation period; and when the laser refracts 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 refraction landing point position.

[0042] Specifically, the protective film 5 is an upper and lower protective film for OLED (Organic Light-Emitting Diode).

[0043] In at least one embodiment, by cooperating the first laser ranging device 1 and the second laser ranging device 2 to detect the thickness of any position on the protective film 5, it can adapt to the protective film 5 during movement, and achieve that the actual detection position on the protective film 5 is consistent with 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, which can realize an interleaved line scan 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 through the photosensitive device 3, the refraction landing point position of the laser passing through the protective film 5 can be captured, and at the same time, the detection of the refractive index of the protective film 5 can be realized.

[0044] In at least one embodiment, please refer to Figure 5 , when the laser spots emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 on the protective film 5 are the closest, the control module respectively detects the thickness of the protective film 5 through the two groups of first laser ranging devices 1 and second laser ranging devices 2 to determine whether the two first laser ranging devices 1 and the two second laser ranging devices 2 are normal.

[0045] Specifically, when the lasers emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 have the closest landing points on the protective film 5, theoretically, the thicknesses of the protective film 5 detected by the two groups of first laser ranging devices 1 and second laser ranging devices 2 should be the same. If the thicknesses of the protective film 5 detected by the two groups of first laser ranging devices 1 and second laser ranging devices 2 are the same, it is determined that the two first laser ranging devices 1 and the two second laser ranging devices 2 are working properly. If the thicknesses of the protective film 5 detected by the two groups of first laser ranging devices 1 and second laser ranging devices 2 are different, it is determined 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.

[0046] Specifically, please refer to 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 emit lasers to the same point on the protective film 5 successively, although there is an intersection point between the first scanning line 123 and the second scanning line 124, in fact, the two lasers will 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 landing points of the lasers emitted by the two first laser ranging devices 1 or the two second laser ranging devices 2 on the protective film 5 are the closest.

[0047] In at least one embodiment, please refer to Figure 1 , the protective film 5 detection system further includes: two mounting bars 4; the two mounting bars 4 are parallel and horizontally arranged, and the two first laser ranging devices 1 are respectively mounted on one of the mounting bars 4, and the two second laser ranging devices 2 are respectively mounted on the other mounting bar 4.

[0048] Specifically, the mounting bar 4 functions to mount and position, and can realize the mounting of the first laser ranging device 1 and the second laser ranging device 2, and at the same time position the first laser ranging device 1 and the second laser ranging device 2.

[0049] In at least one embodiment, please refer to 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 arranged in a staggered manner so that the lasers emitted when the two first laser emitters 12 rotate towards each other are staggered; 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 scan of the protective film 5 within a rotation period.

[0050] Specifically, the first rotating member 11 may be a rotating motor to drive the first laser emitter 12 to rotate.

[0051] Specifically, the first rotating member 11 drives the first laser emitter 12 to rotate along the direction F1.

[0052] 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 .

[0053] 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 .

[0054] 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.

[0055] In at least one embodiment, see Figure 3 The 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.

[0056] Specifically, the second rotating member 21 may be a rotating motor to drive the second laser emitter 22 to rotate.

[0057] Specifically, the second rotating member 21 drives the first laser emitter 12 to rotate along the direction F1.

[0058] 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 .

[0059] 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 .

[0060] 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 both ends of the photosensitive strip 31; the control module is further configured to obtain, through the corresponding depth cameras, the distance from the first laser ranging device 1 in the same group of the first laser ranging device 1 and the second laser ranging device 2 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. Furthermore, the control module is further 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.

[0061] Specifically, the depth camera can obtain the three-dimensional coordinates of the target point.

[0062] Specifically, please refer to Figure 6 , the three-dimensional coordinates of the first laser ranging device 1 are known, the laser irradiates on the protective film 5, and thus 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. At the same time, the rotation angle α of the first laser ranging device 1 is known, 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, and the rotation angle β of the second laser ranging device 2 is known. Furthermore, 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 minus S3 and S4 gives the thickness of the protective film 5 at the common point position.

[0063] In at least one embodiment, a fluorescent layer is coated on the photosensitive strip 31; the control module is further configured to obtain, through the corresponding depth cameras, the refraction position of the laser on the protective film 5 and the actual refraction landing position on the fluorescent layer. Furthermore, the control module is further configured to obtain the theoretical refraction landing 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 position and the theoretical refraction landing position to determine whether the refractive index of the protective film 5 is normal.

[0064] Specifically, please refer to 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 landing position b on the fluorescent layer. And since the refractive index of the protective film 5 itself is known, the three-dimensional coordinates of the theoretical refraction landing position c of the laser on the fluorescent layer can be calculated. By comparing the actual refraction landing position b and the theoretical refraction landing 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.

[0065] In at least one embodiment, a photosensitive resistor array is arranged along the length direction on the photosensitive strip 31; 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 photosensitive resistor array through the corresponding depth camera. Furthermore, the control module is further configured to obtain the theoretical refraction landing position of the laser on the photosensitive resistor 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 position and the theoretical refraction landing position to determine whether the refractive index of the protective film 5 is normal.

[0066] Specifically, please refer to Figure 7 , the depth camera can obtain the three-dimensional coordinates of the refraction position a of the laser on the protective film 5, the photosensitive resistor array can obtain the three-dimensional coordinates of the actual refraction landing position b, and since the refractive index of the protective film 5 itself is known, the three-dimensional coordinates of the theoretical refraction landing position c of the laser on the photosensitive resistor array can be calculated. By comparing the actual refraction landing position b and the theoretical refraction landing 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.

[0067] In at least one embodiment, the two first laser ranging devices 1 and the two second laser ranging devices 2 form a set of ranging units, and two sets of the ranging units are arranged side by side so that the two sets of the ranging units work alternately.

[0068] Specifically, when the two sets of ranging units work alternately, the reset time of the rotating part can be saved, and the detection of the protective film 5 can be realized continuously without interruption.

[0069] Based on the same technical concept, at least one embodiment further provides a detection method, which includes: 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. Furthermore, the control module is configured to capture the co-point position through the corresponding photosensitive device 3 to obtain the thickness of the protective film 5, and form an interleaved line scan of the protective film 5 within one rotation period.

[0070] Based on the same inventive concept, at least one embodiment further provides a detection method, which includes: when the laser passes through the protective film 5 and refracts onto 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 refraction landing point.

[0071] Based on the same inventive concept, at least one embodiment further 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 at the closest positions, the control module respectively detects the thickness of the protective film 5 through the two groups of first laser ranging devices 1 and second laser ranging devices 2 to determine whether the two first laser ranging devices 1 and the two second laser ranging devices 2 are normal.

[0072] In summary, the present invention cooperates the first laser ranging device and the second laser ranging device to detect the thickness of any position on the protective film, can adapt to the protective film during movement, and realizes that the actual detection position on the protective film is consistent with 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 detection positions are evenly distributed in any area of the protective film, accurately reflecting the overall quality of the protective film. And through the photosensitive device, the refraction landing point position of the laser passing through the protective film can be captured, and at the same time, the refractive index of the protective film can be detected.

[0073] The disclosures and other solutions, examples, embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or a combination of one or more of them. The disclosed content and other embodiments can be implemented as one or more computer program products, that is, modules of one or more computer program instructions encoded on a tangible and non-transitory computer-readable medium for execution by a data processing apparatus or to control the operation of a data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a substance composition affecting a machine-readable propagated signal, or a combination of one or more of them. The term "data processing unit" or "data processing apparatus" includes all apparatuses, devices, and machines for processing data, including, for example, programmable processors, computers, or multi-processors or computer groups. In addition to the hardware, the apparatus may further include code for creating an execution environment for the computer program, for example, code constituting the processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. The 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.

[0074] A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and can 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. The program can be stored in a part 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 can be deployed on one or more computers that are located at one site or distributed across multiple sites and interconnected by a communication network.

[0075] The processes and logical flows described in this document can be performed by one or more programmable processors that execute one or more computer programs to perform functions by operating on input data and generating output. The processes and logical flows can also be performed by special-purpose logic circuitry, and the apparatus can also be implemented as special-purpose logic circuitry, e.g., an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).

[0076] For example, processors suitable for executing a computer program include general and special-purpose microprocessors, and any one or more of any type of digital computer. Generally, a 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. Generally, a computer will also include one or more mass storage devices for storing data, e.g., magnetic disks, magneto-optical disks, or optical disks, or operatively coupled to receive data from or transfer data to a mass storage device, or both. However, a computer does not necessarily have such devices. 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 disc read-only memory (CD ROM) and digital versatile disc read-only memory (DVD-ROM) discs. The processor and the memory can be supplemented by, or incorporated in, special-purpose logic circuitry.

[0077] Although this patent document contains many details, it should not be construed as limiting any invention or the scope of any claims, but rather as a description of the features of particular embodiments of a particular invention. Certain features described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, the various functions described in the context of a single embodiment may also be implemented separately in multiple embodiments, or in any suitable sub-combination. Additionally, although the above features may be described as acting in certain combinations, and even initially claimed as such, in some cases, one or more features from a claimed combination may be removed from the combination, and the claimed combination may be directed to a sub-combination or a variant of a sub-combination.

[0078] Likewise, although the operations are described in a particular order in the drawings, this should not be construed to mean that such operations must be performed in the particular order shown or in sequential order to achieve the desired result, or that all of the illustrated operations must be performed. Additionally, the separation of various system components in the embodiments of this patent document should not be construed to mean that such separation is required in all embodiments.

[0079] Only some 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.

[0080] A first component is directly coupled to a second component when there is no intermediate component other than a line, trace, or another medium between the first and second components. A first component is indirectly coupled to a second component when there is an intermediate component other than a line, trace, or another medium between the first and second components. The term "coupled" and its variants include both direct coupling and indirect coupling. Unless otherwise stated, the use of the term "about" means including a range of plus or minus 10% of the numerical value.

[0081] Although several embodiments are provided in this 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 disclosure. The current examples are considered 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.

[0082] In several embodiments provided in this document, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of devices, methods, and computer program products according to multiple embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0083] In addition, without departing from the scope of the present disclosure, the discrete or separate technologies, systems, subsystems, and methods described and illustrated in various embodiments can be combined or integrated with other systems, modules, technologies, or methods. Other items shown or discussed as being coupled can be directly connected, or can be indirectly coupled or communicate electrically, mechanically, or otherwise through some interface, device, or intermediate component. Those skilled in the art can determine other examples of changes, substitutions, and alterations 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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