A PU protective film light transmittance detection device

Abstract

The invention relates to a PU protective film light transmittance detection device in the field of film light transmittance detection devices. The PU protective film light transmittance detection device comprises a detection frame, both ends of the detection frame are equipped with rollers, a detection part is fixedly connected to the detection frame, the detection part comprises an upper detection plate and a lower detection plate, a light generating structure is installed in the upper detection plate, the light generating structure comprises a plurality of evenly distributed detection strips, the lower ends of the detection strips are damped and slidably connected with a light transmitting frame, a light generator is installed in the detection strip; both ends of the upper detection plate are equipped with auxiliary docking beams perpendicular to the detection strips, a plurality of first electromagnets matching the positions of the detection strips are arranged on the auxiliary docking beams; both ends of the light transmitting frame are equipped with permanent magnets matching the first electromagnets; a photosensitive structure matching the light generating structure is installed in the lower detection plate; the detection mode switching between multi-point small-range detection and large-range detection is convenient, so as to meet the needs of the detection range of different types of PU molds.

Description

Technical Field

[0001] The present invention relates to a PU protective film light transmittance detection device, and in particular to a PU protective film light transmittance detection device applied in the field of film light transmittance detection devices. Background Art

[0002] The PU protective film transmittance detection device is a device used to detect the light transmittance of the PU protective film. The device usually uses optical instruments such as a photometer or a spectrometer to evaluate the light transmittance of the PU protective film by measuring the light intensity or spectral distribution passing through the PU protective film.

[0003] The PU protective film light transmittance detection device is widely used in the fields of PU protective film production, quality control and research and development. During the production process, the light transmittance of the PU protective film can be monitored in real time through the device to ensure that the product quality meets the requirements. In quality control, the device can be used to conduct random inspections on finished products to ensure that their light transmittance meets the relevant standards. During the research and development process, the device can be used to test the light transmittance of PU protective films with different formulas and processes to evaluate their performance and optimize product design.

[0004] In order to solve the problem of detection efficiency of film transmittance detection devices, a certain detection device on the market adopts the design of laser sensor and has a certain market share.

[0005] Chinese invention patent CN114878523B discloses a transparent conductive film performance testing device, including a base and a detection module, a top plate is arranged on the top surface of the base, a photosensitive module is arranged in the middle of the surface of the top plate, clamping parts are arranged on both sides of the photosensitive module, a telescopic seat is arranged at one end of the base, a driving motor is arranged on the surface of the telescopic seat, a telescopic part is installed at the top of the telescopic seat, a detection module is installed on the top surface of the telescopic part, a light source column is installed at the bottom of the detection module, and a pressure ring is installed at the bottom of the light source column. The invention is provided with a corresponding clamping structure, and based on the clamping structure, the vertical height of the fixed transparent film can be adjusted to cooperate with the multi-elevation measurement and data capture of the transmittance, and has a variety of fixing methods, which can avoid the deformation of the film under the conventional fixing process in the past to affect the measured data results.

[0006] Existing film transmittance detection devices have limitations in improving efficiency and accuracy. Usually, these devices may only support detection in a single range, either a large range with limited accuracy, or a small range with slow detection speed, lacking flexibility and efficiency. At the same time, during the detection process, the film layer is easily damaged, affecting the reliability of the detection and the integrity of the film layer itself. These defects limit the performance of existing film transmittance detection devices in practical applications. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing film transmittance detection device only supports detection in a single range, and the film layer is easily damaged during the detection process.

[0008] In order to solve the above problems, the present invention provides a PU protective film transmittance detection device, including a detection frame, both ends of the detection frame are equipped with rollers, a detection unit is fixedly connected to the detection frame, the detection unit includes an upper detection plate and a lower detection plate, and a pair of lifting devices are connected between the upper detection plate and the lower detection plate;

[0009] A light generating structure is installed in the upper detection plate, and the light generating structure includes a plurality of evenly distributed detection strips, and the lower ends of the detection strips are connected to a light-transmitting frame in a damping sliding manner, and a light generator is installed in the detection strips; auxiliary docking beams perpendicular to the detection strips are installed at both ends of the upper detection plate, and a plurality of first electromagnets matching the positions of the detection strips are arranged on the auxiliary docking beams; and permanent magnets matching the first electromagnets are installed at both ends of the light-transmitting frame;

[0010] A photosensitive structure matching the light generating structure is installed in the lower detection plate; the photosensitive structure includes multiple rows of photoelectric sensors, a partition plate is provided between two adjacent photoelectric sensors, an electric push rod matching the partition plate is installed on the lower detection plate, a light-transmitting plate flush with the upper surface of the lower detection plate is provided on the upper side of the photoelectric sensor, and a groove matching the partition plate is provided on the lower surface of the light-transmitting plate.

[0011] In the above-mentioned PU protective film transmittance detection device, it is convenient to switch the detection mode between multi-point small-range detection and large-range detection, so as to meet the requirements of the detection range of different types of PU molds.

[0012] As a further improvement of the present application, the light generator includes a plurality of evenly distributed light source units, the photosensitive structure includes a plurality of photosensitive units, and the positions of the photosensitive units match the positions of the light source units.

[0013] As a further improvement of the present application, the length of the reel is smaller than the length of the detection strip, and a laser transmitter and a laser receiver are respectively mounted on the two reel brackets. The laser transmitter includes a transmitting end, and the mounting position of the transmitting end matches the cross section of the upper end of the reel.

[0014] As a further improvement of the present application, the upper end of the partition board is conical, and a reflective layer is provided on the conical inclined surface.

[0015] As another improvement of the present application, the frame body of the light-transmitting frame is made of opaque material, and a light-transmitting plate made of light-transmitting material is installed on the top of the light-transmitting frame.

[0016] As a further improvement of the present application, a pressure monitoring strip is provided at one end of the light generating structure, and a second electromagnet matching the pressure monitoring strip is provided on the auxiliary docking beam. When the first electromagnet works, the second electromagnet is turned on synchronously, and the pressure monitoring strip moves synchronously with the lower detection plate performing detection work.

[0017] As another improved supplement of the present application, it also includes a detection and control system, the detection and control system includes a processor, and the processor is connected to a detection module, a control module, a data storage module and an alarm module;

[0018] The control module is provided with an overall detection mode and a segmented detection mode corresponding to the detection part; in the overall detection mode, a plurality of detection strips are simultaneously connected with the photosensitive structure to perform an overall detection to detect the light transmittance of the film in a large area;

[0019] In the segmented detection mode, multiple detection strips are connected to the photosensitive structure one by one to perform segmented detection, so as to detect the light transmittance of multiple continuous small-area films one by one;

[0020] The detection module is used to collect and process the brightness parameters from the light generating structure during detection work and the brightness data collected by the photosensitive structure.

[0021] As another improvement and supplement to the present application, overall detection is a prerequisite step for segmented detection. When the result of the overall detection does not match the set transmittance range, the detection unit switches to the segmented detection mode.

[0022] As another improvement supplement to the present application, the plurality of detection strips are respectively provided with numbers, and in the segmented detection mode, one or more numbered detection strips are randomly selected at each set time interval to independently perform light transmittance detection, and the detection strip is reset after the detection is completed.

[0023] In summary, this solution can easily improve the efficiency and accuracy of PU film transmittance detection. By designing multiple detection strips and corresponding photoelectric sensors, a combination of large-scale rapid detection and small-scale high-precision detection is achieved, which improves the flexibility and reliability of detection, while reducing interference from external light sources and protecting the film layer from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of the detection unit of the first and second embodiments of the present application;

[0025] Figure 2 It is a side view of the detection device of the first and second embodiments of the present application;

[0026] Figure 3 This is a three-dimensional schematic diagram of the light generating structure of the first embodiment of the present application;

[0027] Figure 4This is a cross-sectional view of the detection portion of the first embodiment of the present application;

[0028] Figure 5 for Figure 4 The structural diagram at A in the middle;

[0029] Figure 6 It is a partial cross-sectional view of the test strips of the first and second embodiments of the present application when independently performing light transmittance testing;

[0030] Figure 7 This is a front cross-sectional view of the detection unit of the first embodiment of the present application;

[0031] Figure 8 for Figure 7 The structural diagram at B in the middle;

[0032] Fig. 9 This is a system block diagram of the second implementation mode of this application.

[0033] Description of the numbers in the figure:

[0034] 1 detection frame, 11 reel, 2 detection part, 21 upper detection plate, 22 lower detection plate, 23 lifting device, 24 auxiliary docking beam, 241 first electromagnet, 3 light generating structure, 31 detection strip, 32 light-transmitting frame, 33 light generator, 4 pressure monitoring strip, 5 photosensitive structure, 51 photoelectric sensor, 52 partition plate, 53 light-transmitting plate. DETAILED DESCRIPTION

[0035] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0036] The first implementation method:

[0037] Figure 1-8 A PU protective film transmittance detection device is shown, comprising a detection frame 1, both ends of the detection frame 1 are equipped with reels 11, the reels 11 are used to pull the PU film, the detection frame 1 is fixedly connected with a detection part 2, the detection part 2 comprises an upper detection plate 21 and a lower detection plate 22, and a pair of lifting devices 23 are connected between the upper detection plate 21 and the lower detection plate 22;

[0038] A light generating structure 3 is installed in the upper detection plate 21, and the light generating structure 3 includes a plurality of evenly distributed detection strips 31, and a light-transmitting frame 32 is connected to the lower end of the detection strip 31 in a damping sliding manner, and a light generator 33 is installed in the detection strip 31; the light generator 33 adopts a light-emitting device for light transmittance detection in the prior art, which includes a halogen tungsten lamp, a xenon lamp and an LED light source;

[0039] Auxiliary docking beams 24 perpendicular to the detection strip 31 are installed at both ends of the upper detection plate 21, and a plurality of first electromagnets 241 matching the positions of the detection strips 31 are arranged on the auxiliary docking beams 24; permanent magnets matching the first electromagnets 241 are installed at both ends of the light-transmitting frame 32, and a compression spring is connected between the first electromagnet 241 and the permanent magnet; when the first electromagnet 241 is turned off, the light-transmitting frame 32 is quickly reset by the compression spring, so that the detection strip 31 can be quickly and continuously detected at multiple points when it is pulled and moved by the PU film;

[0040] The frame body of the light-transmitting frame 32 is made of opaque material, and a light-transmitting plate made of light-transmitting material is installed on the top of the light-transmitting frame 32 .

[0041] A photosensitive structure 5 matching the light generating structure 3 is installed in the lower detection plate 22; the photosensitive structure 5 includes multiple rows of photoelectric sensors 51, the light generator 33 includes multiple evenly distributed light source units, the photosensitive structure 5 includes multiple photosensitive units, the photosensitive units are photoelectric sensors of the prior art, including photodiodes and charge coupled devices, and the positions of the photosensitive units match the positions of the light source units; a partition plate 52 is provided between two adjacent photoelectric sensors 51, an electric push rod matching the partition plate 52 is installed on the lower detection plate 22, a light-transmitting plate 53 flush with the upper surface of the lower detection plate 22 is provided on the upper side of the photoelectric sensor 51, and the PU film is attached to the upper surface of the light-transmitting plate 53 when being pulled;

[0042] The lower surface of the light-transmitting plate 53 is provided with a groove matching the partition plate 52 ; the upper end of the partition plate 52 is conical, and a reflective layer is provided on the conical inclined surface.

[0043] The partition plate 52 of this solution is used to isolate two adjacent rows of photoelectric sensors 51 from each other, so that the photoelectric sensors 51 corresponding to the positions of the independently working detection strips 31 can receive sufficient light, and reduce the light scattered to the gas area, which is easy to improve the accuracy of light transmittance detection;

[0044] When the detection strip 31 needs to perform light transmittance detection independently, the first electromagnet 241 at the corresponding position is controlled to make the light-transmitting frame 32 descend to fit the PU film to be detected, and then the light generator 33 therein and the photoelectric sensor 51 at the corresponding position are turned on to detect the light transmittance of the local area of ​​the PU film;

[0045] When it is necessary to detect the light transmittance in a wide range, the light transmittance frame 32 is reset to the initial position, and then the lifting device 23 works to lower the upper detection plate 21, so that multiple detection strips 31 are simultaneously close to the PU film, and then multiple light generators 33 are simultaneously turned on to perform light transmittance detection. At this time, multiple photoelectric sensors 51 are used to detect the light transmittance of a large area of ​​the film.

[0046] Optionally, an inkjet marking device is installed at the output end of the detection unit 2, and a plurality of evenly distributed nozzles are arranged on the inkjet marking device. The inkjet marking device is used for inkjet marking of areas with unqualified transmittance.

[0047] The length of the reel 11 is less than the length of the detection strip 31. A laser transmitter and a laser receiver are respectively installed on the two reel 11 brackets. The laser transmitter includes a transmitting end, and the installation position of the transmitting end matches the upper end section of the reel 11. The laser transmitter and the laser receiver are used to calibrate the positions of the upper detection plate 21 and the lower detection plate 22 and whether the PU film remains flat; when the PU film is bent, the upper detection plate 21 drops too low, or the lower detection plate 22 is fixed at a high position, the laser emitted by the laser transmitter is blocked, thereby affecting the reception of the laser receiver. At this time, it can be determined that the PU film is bent, the detection structure is invalidated and re-detected, and by detecting whether the PU film is bent, the influence of the light transmittance change caused by the deformation of the PU film on the light transmittance detection is reduced.

[0048] A pressure monitoring strip 4 is provided at one end of the light generating structure 3, and a second electromagnet matching the pressure monitoring strip 4 is provided on the auxiliary docking beam 24. When any first electromagnet 241 works, the second electromagnet is turned on synchronously, and the pressure monitoring strip 4 moves synchronously with the lower detection plate 22 performing detection work. A pressure monitoring plate matching the pressure monitoring strip 4 is installed at the end of the photosensitive structure 5, and a plurality of evenly distributed pressure sensing units are provided on the pressure monitoring plate.

[0049] When the detection strips 31 are lowered independently or as a whole to detect the light transmittance, the pressure detection strips 4 move synchronously to detect the pressure value of the detection strips 31 on the PU film, thereby avoiding excessive pressure on the PU film during the detection process to cause damage to the film layer.

[0050] In this embodiment, multiple detection strips 31 can be used to work synchronously to perform light transmittance detection in a large area, or a single detection strip 31 can be used to perform light transmittance detection in a small area;

[0051] Although the detection range of a single detection strip 31 is small, its energy consumption is also small. In comparison, the contact range between its detection end and the PU film is small, which facilitates rapid multi-point continuous detection of the PU film when the reel 11 pulls the PU film to move.

[0052] In addition, the detection strip 31 of the present solution is fitted with the PU film as much as possible during detection, so that the detected PU film area is enclosed by the detection strip 31 and the light-transmitting plate 53, thereby reducing the influence of external light sources.

[0053] By designing multiple evenly distributed detection strips 31 and corresponding photoelectric sensors 51, this embodiment can not only realize rapid detection of a large area of ​​the PU film, but also support small-range, high-precision single-point detection. This flexibility enables the device to adapt to different detection needs and improve detection efficiency. When necessary, multiple detection strips 31 can be selected to work synchronously to detect a large area; when high accuracy is required or energy saving is required, a single detection strip 31 can be selected for small-range detection.

[0054] Second implementation method:

[0055] Fig. 9 As shown, it also includes a detection and control system, which includes a processor, and the processor is connected to a detection module, a control module, a data storage module and an alarm module;

[0056] The control module is provided with an overall detection mode and a segmented detection mode corresponding to the detection unit 2; in the overall detection mode, a plurality of detection strips 31 are simultaneously connected with the photosensitive structure 5 to perform an overall detection to detect the light transmittance of the film in a large area;

[0057] In the segmented detection mode, multiple detection strips 31 are connected to the photosensitive structure 5 one by one to perform segmented detection, so as to detect the light transmittance of multiple continuous small-range area films one by one;

[0058] The detection module is used to collect and process the brightness parameters from the light generating structure 3 when performing detection work and the brightness data collected by the photosensitive structure 5.

[0059] The overall detection is a pre-step of the segmented detection. When the result of the overall detection does not match the set transmittance range, the detection unit 2 switches to the segmented detection mode.

[0060] The plurality of test strips 31 are respectively provided with numbers. In the segmented test mode, one or more test strips 31 with numbers are randomly selected at each set time interval to independently test the light transmittance. After the test is completed, the test strips 31 are reset. By randomly selecting the test strips 31 to work independently, a rapid sampling area test of the PU film to be tested is achieved, which is easy to improve the test efficiency.

[0061] The detection and control system of this embodiment realizes the automation and intelligent management of the detection process, ensuring the accuracy and efficiency of the detection process. In the overall detection mode, all detection strips 31 work synchronously, and through large-scale parallel processing, a wide range of light transmittance data of the PU film is quickly obtained, providing a comprehensive basis for subsequent quality evaluation. When the overall detection result shows that the light transmittance of the PU film does not meet the preset standard, the system automatically switches to the segmented detection mode for more detailed detection and analysis.

[0062] The segmented detection mode randomly selects the detection strips 31 to work independently, which not only realizes multi-point sampling detection of the PU film, but also effectively avoids the local wear or heat accumulation problems that may be caused by continuous detection. At the same time, the random selection strategy ensures the comprehensiveness and randomness of the detection, making the detection results more representative and reliable.

[0063] During the segmented detection process, the detection module collects and processes the brightness parameters of the light generating structure 3 and the brightness data collected by the photosensitive structure 5 in real time, and accurately determines the light transmittance of each area of ​​the PU film through comparison and analysis.

[0064] In addition, the detection and control system also integrates a data storage module to record the results and parameters of each test, providing data support for quality traceability and product improvement. When an area with unqualified transmittance is detected, the alarm module will be triggered immediately, and an audible and visual alarm or an automatic alarm message will be sent to relevant personnel to ensure that the problem is handled in a timely manner. In summary, the detection and control system of this embodiment realizes comprehensive, efficient and accurate detection of the light transmittance of the PU film by integrating multiple functional modules and adopting advanced detection strategies.

[0065] In summary, this solution can easily improve the efficiency and accuracy of PU film transmittance detection. By designing multiple detection strips and corresponding photoelectric sensors, a combination of large-scale rapid detection and small-scale high-precision detection is achieved, which improves the flexibility and reliability of detection, while reducing interference from external light sources and protecting the film layer from damage.

[0066] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A PU protective film light transmittance detection device, comprising a detection frame (1), wherein both ends of the detection frame (1) are equipped with rollers (11), characterized in that: The detection frame (1) is fixedly connected to a detection portion (2), the detection portion (2) comprising an upper detection plate (21) and a lower detection plate (22), and a pair of lifting devices (23) are connected between the upper detection plate (21) and the lower detection plate (22); A light generating structure (3) is installed in the upper detection plate (21), the light generating structure (3) comprising a plurality of evenly distributed detection strips (31), the lower ends of the detection strips (31) being connected to a light-transmitting frame (32) in a damping sliding manner, and a light generator (33) is installed in the detection strips (31); auxiliary docking beams (24) perpendicular to the detection strips (31) are installed at both ends of the upper detection plate (21), and a plurality of first electromagnets (241) matching the positions of the detection strips (31) are arranged on the auxiliary docking beams (24); and permanent magnets matching the first electromagnets (241) are installed at both ends of the light-transmitting frame (32); A photosensitive structure (5) matching the light generating structure (3) is installed in the lower detection plate (22); the photosensitive structure (5) comprises a plurality of rows of photoelectric sensors (51), a partition plate (52) is provided between two adjacent photoelectric sensors (51), an electric push rod matching the partition plate (52) is installed on the lower detection plate (22), a light-transmitting plate (53) flush with the upper surface of the lower detection plate (22) is provided on the upper side of the photoelectric sensor (51), and a groove matching the partition plate (52) is provided on the lower surface of the light-transmitting plate (53); The light generator (33) comprises a plurality of evenly distributed light source units, the photosensitive structure (5) comprises a plurality of photosensitive units, and the positions of the photosensitive units match the positions of the light source units; A pressure monitoring strip (4) is disposed at one end of the light generating structure (3), and a second electromagnet matching the pressure monitoring strip (4) is disposed on the auxiliary docking beam (24); when any of the first electromagnets (241) is in operation, the second electromagnet is turned on synchronously, and the pressure monitoring strip (4) moves synchronously with the lower detection plate (22) performing the detection work, and a pressure monitoring plate matching the pressure monitoring strip (4) is installed at the end of the photosensitive structure (5); The frame body of the light-transmitting frame (32) is made of a light-impermeable material, and a light-transmitting plate made of a light-transmitting material is installed on the top of the light-transmitting frame (32); It also includes a detection and control system, which includes a processor, and the processor is connected to a detection module, a control module, a data storage module and an alarm module; The control module is provided with an overall detection mode and a segmented detection mode corresponding to the detection unit (2); in the overall detection mode, a plurality of detection strips (31) are simultaneously connected to the photosensitive structure (5) to perform overall detection, thereby detecting the light transmittance of the film in a large area; In the segmented detection mode, multiple detection strips (31) are connected to the photosensitive structure (5) one by one to perform segmented detection, so as to detect the light transmittance of multiple continuous small-range area films one by one; The detection module is used to collect and process brightness parameters from the light generating structure (3) when performing detection work and brightness data collected by the light sensing structure (5).

2. A PU protective film light transmittance detection device according to claim 1, characterized in that: The length of the reel (11) is less than the length of the detection strip (31); a laser transmitter and a laser receiver are respectively mounted on two reel (11) brackets; the laser transmitter comprises a transmitting end; the mounting position of the transmitting end matches the upper end section of the reel (11).

3. The PU protective film light transmittance detection device according to claim 1, characterized in that: The upper end of the partition plate (52) is conical, and a reflective layer is provided on the conical inclined surface.

4. The PU protective film light transmittance detection device according to claim 1, characterized in that: The overall detection is a pre-step of the segmented detection. When the result of the overall detection does not conform to the set transmittance range, the detection unit (2) switches to the segmented detection mode.

5. The PU protective film light transmittance detection device according to claim 1, characterized in that: The plurality of detection strips (31) are respectively provided with numbers. In the segmented detection mode, one or more numbered detection strips (31) are randomly selected at set intervals to independently perform light transmittance detection. After the detection is completed, the detection strips (31) are reset.

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