Number plate endorsement device and number plate endorsement system

Abstract

The utility model provides a number plate endorsement device and a number plate endorsement system, comprising a first endorsement device, the first endorsement device is provided with a support, the top of the support is provided with a laser emitting device used for emitting laser beams, and the middle part of the support is fixedly provided with a mobile platform; the moving platform is connected with the automatic displacement device and drives the automatic displacement device to move up and down in the vertical direction, the automatic displacement device is used for bearing a diffusion sheet and adjusting displacement of the diffusion sheet in the horizontal direction, an imaging lens is fixed below the automatic displacement device, and laser beams are converged by the imaging lens after the diffusion angle is increased through the diffusion sheet; and endorsing the first identification information on the number plate through the imaging lens. According to the utility model, the service life of the license plate endorsement device is prolonged, the maintenance difficulty is reduced, the stability of laser endorsement is improved, the endorsement efficiency, the endorsement effect and the quality of a final product are ensured, and the anti-counterfeiting safety effect of a license plate surface identifier is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to license plate signing device and license plate signing system, more particularly to a license plate signing device and license plate signing system for motor vehicle license plate sequence identification. BACKGROUND

[0002] The existing motor vehicle license plate adopts various anti-counterfeiting technologies, including two-dimensional codes, special characters, serial numbers, etc. Among them, the special character with the dynamic space image of the floating and sinking visual effect needs to use a special dynamic laser signing device to form. When the existing signing device signs the special character, the laser emitted by the laser needs to be scattered through the diffusion sheet. After the signing device works for a long time, the diffusion sheet will be damaged by heat accumulation and photon energy impact, causing a certain loss of the microstructure on the surface of the diffusion sheet, thereby affecting the signing quality, affecting the clarity and accuracy of the special character, and unable to guarantee the anti-counterfeiting effect, which is not conducive to the management department to identify and manage the motor vehicle license plate. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a license plate signing device and license plate signing system with longer service life and more stable signing efficiency.

[0004] According to one aspect of the utility model, a license plate signing device is provided, which comprises:

[0005] The first signing device has a support, a laser emitting device is installed at the top of the support for emitting a laser beam, a moving platform is fixed in the middle of the support, the moving platform is connected with an automatic displacement device and drives the automatic displacement device to move up and down along the vertical direction, the automatic displacement device is used for bearing the diffusion sheet and adjusting the displacement of the diffusion sheet in the horizontal direction, an imaging lens is fixed below the automatic displacement device, the laser beam is converged by the imaging lens after the diffusion angle is increased by the diffusion sheet, and the first identification information is signed on the license plate by the imaging lens.

[0006] In some embodiments, the automatic displacement device is electrically connected with the control system, the automatic displacement device comprises a motor installed on the moving platform, the output shaft of the motor is connected with one end of a rotating shaft, the other end of the rotating shaft is installed in a clamping seat, the clamping seat is fixed on a support plate, a sliding block is installed below the support plate, the rotating shaft rotates to drive the sliding block to slide on the guide rail, and the diffusion sheet above the support plate is displaced in the direction parallel to the guide rail when the sliding block moves.

[0007] In some embodiments, a diffusion sheet fixing frame is arranged above the support plate, and the diffusion sheet is tightly fixed inside the diffusion sheet fixing frame.

[0008] In some embodiments, a sensor is further installed outside the sliding block, and the sensor is used for monitoring the displacement distance of the automatic displacement device.

[0009] In some embodiments, the license plate signing device further comprises a detection device between the laser emitting device and the diffuser, for collecting the structure of the laser beam passing through the surface of the diffuser and uploading it to the control system.

[0010] In some embodiments, the diffuser is provided with two pieces, and the two pieces of the diffuser are arranged in high and low positions.

[0011] In some embodiments, the diffuser is an optical device with diffusing effect, selected from but not limited to any one of the following: frosted optical glass, optical grating, microlens array or cylindrical lens array.

[0012] Another aspect of the utility model provides a license plate signing system, comprising:

[0013] The workbench is used for placing and transmitting the license plate, and the first signing device and the second signing device are sequentially arranged on the workbench, the first signing device signs the first identification information on the surface of the license plate located at the first signing station, the second signing device signs the second identification information on the surface of the license plate located at the second signing station, the first identification information includes special characters, and the second identification information includes a two-dimensional code and a serial number.

[0014] The first signing device has a support, a laser emitting device is installed at the top of the support, a laser beam is emitted by the laser emitting device, a moving platform is fixed in the middle of the support, the moving platform is connected with the automatic displacement device and drives the automatic displacement device to move up and down along the vertical direction, a diffuser is carried above the automatic displacement device, the automatic displacement device is used to adjust the displacement of the diffuser in the horizontal direction, an imaging lens is fixed below the automatic displacement device, the laser beam is converged by the imaging lens after the diffusing angle is increased by the diffuser, and the first identification information is signed on the license plate by the imaging lens.

[0015] In some embodiments, the automatic displacement device is electrically connected with the control system, the automatic displacement device comprises a motor installed on the moving platform, the output shaft of the motor is connected with one end of a rotating shaft, the other end of the rotating shaft is installed in a clamping seat, the clamping seat is fixed on the support plate, a sliding block is installed below the support plate, the sliding block is slidingly connected with a guide rail, the guide rail is horizontally arranged, when the sliding block moves, the diffuser is displaced along the parallel direction of the guide rail, a diffuser fixing frame is arranged above the support plate, and the diffuser is tightly fixed in the diffuser fixing frame.

[0016] A sensor is further installed outside the sliding block, and the sensor is used to monitor the displacement distance of the automatic displacement device.

[0017] The license plate signing device further comprises a detection device between the laser emitting device and the diffuser, for collecting the structure of the laser beam passing through the surface of the diffuser and uploading it to the control system.

[0018] In some embodiments, the license plate signing system further comprises a lighting device located in front of the first signing device, the lighting device providing light for the first signing device to sign the license plate, and a CCD camera is installed inside the lighting device to capture the reflective film on the surface of the license plate and upload it to the control system, thereby determining whether the license plate located at the first signing station can be signed.

[0019] The beneficial effects are:

[0020] The license plate signing device of the utility model sets the diffusion plate on the automatic displacement device, adjusts the position of the diffusion plate accurately along with the displacement of the automatic displacement device in the horizontal direction, makes the laser beam always pass through the effective area of the diffusion plate (the effective area refers to the area on the diffusion plate where the microstructure is not damaged), greatly increases the service life of the license plate signing device, and reduces the maintenance difficulty and burden of the use unit.

[0021] The license plate signing device of the utility model increases the detection equipment, the detection equipment can detect the structure of the laser beam passing through the surface of the diffusion plate in real time, once the surface structure of the diffusion plate changes, the detection equipment can quickly identify and feedback to the control system, the control system controls the automatic displacement device to adjust and move to the position where the next diffusion plate surface structure is complete, finally signs the dynamic space image with the floating and sinking effect, the degree of automation is high, and the stability of the laser signing is improved, the signing efficiency, signing effect and quality of the final product of the license plate signing device are guaranteed, and the anti-fake security effect of the license plate surface mark is enhanced.

[0022] The license plate signing system of the utility model adopts the lighting device of the area light source, so that the light can fall more uniformly on the license plate when taking pictures, and the quality of the obtained image is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structure schematic view of a license plate signing device of an embodiment of the utility model;

[0024] Figure 2 It is a structure schematic view of an automatic displacement unit in a license plate signing device of an embodiment of the utility model;

[0025] Figure 3 It is a schematic view of diffusion plate displacement in a license plate signing system of an embodiment of the utility model;

[0026] Figure 4 It is a structure schematic view of a license plate signing system of an embodiment of the utility model;

[0027] Wherein, 1 is the first signing device, 10 is a support, 11 is a laser emitting device, 12 is a detection device, 13 is a moving platform, 14 is a diffusion sheet, 15 is an automatic displacement unit, 150 is a motor, 151 is a rotating shaft, 152 is a card seat, 153 is a sliding block, 154 is a sensor, 155 is a guide rail, 156 is a diffusion sheet fixing frame, 157 is a support plate, 16 is an imaging lens, 2 is the second signing device, 3 is an illumination device, 4 is the first signing station, 5 is a workbench. DETAILED DESCRIPTION

[0028] Figures 1-3 The license plate signing device and the license plate signing system are used for identifying and signing a motor vehicle license plate. The motor vehicle license plate comprises a license plate body and a reflective film on a side surface of the license plate body. After signing by the license plate signing system, a two-dimensional code, special characters and a serial number are formed on the surface of the motor vehicle license plate. The two-dimensional code, the special characters and the serial number are located at the upper left corner of the motor vehicle license plate. The special characters have special visual effects of floating up and sinking down, and the relative positions of the special characters will relatively move when an observer dynamically observes the surface of the license plate. For a high-speed motor vehicle license plate, the dynamic special characters have more superior identification effect and anti-counterfeiting effect than static characters.

[0029] In the embodiment, the special characters are formed by using integrated imaging technology. Integrated imaging is an automatic stereoscopic and multi-view three-dimensional imaging technology. A large numerical aperture lens is used to converge a laser beam in front of or behind a microlens array. The convergence point collects and records the laser recording material under the microlens array. The relative positions between the focusing point of the laser beam and the microlens array are changed to form patterns. Finally, a special visual effect of three-dimensional dynamic space imaging is formed.

[0030] As Figure 1As shown, the motor vehicle license plate is located below the first signing device 1, and the first signing device 1 is used to sign special characters on the surface of the motor vehicle license plate. The first signing device 1 includes a support 10, a laser emitting device 11, a detection device 12, a moving platform 13, a diffusion sheet 14, an automatic displacement device 15, and an imaging lens 16. The laser emitting device 11 is installed on the top of the support 10 and includes a laser and a galvanometer and field lens assembly (not shown) at the output end of the laser. The moving platform 13 is fixed in the middle of the support 10 and can move up and down in the vertical direction. The moving platform 13 is connected with the automatic displacement device 15 and drives the automatic displacement device 15 to move synchronously up and down, so as to adjust the height of the diffusion sheet 14 and the imaging lens 16 in the vertical direction. The automatic displacement device 15 is used to carry the diffusion sheet 14 and adjust the displacement of the diffusion sheet 14 in the horizontal direction, so as to ensure that the structure of the laser beam passing through the surface of the diffusion sheet 14 is complete and has no loss. The imaging lens 16 is installed below the automatic displacement device 15. The detection device 12 is installed between the laser emitting device 11 and the diffusion sheet 14 and is used to detect the structure of the surface of the diffusion sheet 14. The detection device 12 can be a high-resolution camera or a camera. The diffusion sheet 14 can be single or multiple pieces. In this embodiment, the diffusion sheet 14 is in a high-low arrangement. The diffusion sheet 14 can be any one of optical devices with diffusion effect, such as frosted optical glass, grating, microlens array, or cylindrical lens array. In this embodiment, the frosted optical glass is preferred.

[0031] The laser beam is emitted along the laser emitting device 11, passes through the diffusion sheet 14, and is imaged by the imaging lens 16, so as to increase the numerical aperture and further increase the field of view. Finally, a dynamic spatial image with floating and sinking effects is obtained by signing.

[0032] The main function of the diffusion sheet is to diffuse the laser beam into a uniform spot. It disperses the originally concentrated laser energy onto a larger area through special optical design, thereby achieving uniform distribution of energy. Continuous high-power laser (especially continuous wave laser) generates heat accumulation in local area, which causes the diffusion sheet material to melt, carbonize, or the microstructure to deform, resulting in thermal accumulation damage of the diffusion sheet. In addition, the photon energy of ultraviolet or short-wavelength laser (such as 355nm and 266nm) is high, which may directly damage the microstructure of the diffusion sheet. The effects of thermal accumulation damage and photon energy impact cause the microstructure of the surface of the diffusion sheet to be damaged, which cannot guarantee the effect of laser application, and further affects the signing quality.

[0033] Referring to Figure 2In the utility model, diffusion sheet 14 is located on automatic displacement device 15, and with automatic displacement device 15 displacement in horizontal direction, guarantee that the surface structure of diffusion sheet 14 that laser beam passes is complete, further improve the stability of laser signing. Specifically, automatic displacement device 15 includes motor 150, rotating shaft 151, clamping seat 152, sliding block 153, sensor 154, guide rail 155, diffusion sheet fixing frame 156, support plate 157. Motor 150 is installed on mobile platform 13, and one end of rotating shaft 151 is connected with the output shaft of motor 150, and the other end of rotating shaft 151 is installed in clamping seat 152, and clamping seat 152 is concave, and clamping seat 152 is fixed on support plate 157, and sliding block 153 is installed below support plate 157, and sliding block 153 is slidably connected with guide rail 155, and guide rail 155 is located in horizontal direction, and is vertically installed on the surface of mobile platform 13, and rotating shaft 151 rotation drives sliding block 153 to slide on guide rail 155. Diffusion sheet fixing frame 156 is arranged above support plate 157, and diffusion sheet 14 is tightly fixed in diffusion sheet fixing frame 156, and sensor 154 is installed outside sliding block 153, and is used for monitoring the displacement distance of automatic displacement device 15. When motor 150 rotates, support plate 157 can be driven to slide along the direction of guide rail 155, and then the displacement of diffusion sheet 14 in horizontal direction is accurately adjusted.

[0034] In the utility model, diffusion sheet 14 adopts roughened optical glass, and the wide side is parallel to the side of guide rail 155, and the width is 2cm. The displacement of diffusion sheet 14 along the direction parallel to guide rail caused by rotating motor 150 each time can be set according to actual conditions, and can be 0.3mm, 0.5mm, 1mm, 1.5mm, 2mm, etc. without limitation, so that the position of laser beam falling on diffusion sheet 14 changes, as shown in the drawing, and the landing point of laser beam on diffusion sheet 14 moves from A, A' to B, B'. Figure 3 In the utility model, diffusion sheet 14 adopts roughened optical glass, and the wide side is parallel to the side of guide rail 155, and the width is 2cm. The displacement of diffusion sheet 14 along the direction parallel to guide rail caused by rotating motor 150 each time can be set according to actual conditions, and can be 0.3mm, 0.5mm, 1mm, 1.5mm, 2mm, etc. without limitation, so that the position of laser beam falling on diffusion sheet 14 changes, as shown in the drawing, and the landing point of laser beam on diffusion sheet 14 moves from A, A' to B, B'.

[0035] The detection device 12 can detect the microstructure of the laser beam passing through the surface of the diffuser 14 in real time. Once the surface microstructure of the diffuser 14 changes under the action of high-energy laser for a long time, the change can be a sudden structural change, or the long-term structural loss reaches a certain degree, and the detection device 12 can quickly identify and feedback to the control system (not shown). The control system controls the motor to rotate and drive the diffuser 14 on the automatic displacement device 15 to displace, and under the monitoring of the sensor 154, it moves to the next effective area (the effective area refers to the area on the diffuser where the microstructure is not damaged), and then further signs, and finally signs the dynamic space image with good floating and sinking effect, ensuring the signing effect and product quality of the license plate signing device.

[0036] As shown in Figure 4 , it is a license plate signing system, which includes a workbench 5, and the license plate can move on the surface of the workbench. Specifically, the license plate can be continuously conveyed on the surface of the workbench through a track and pass through a first signing station 4 and a second signing station (not shown) in turn. The first signing device 1 and the second signing device 2 are arranged on the workbench 5 in turn. The first signing device 1 signs the first identification information on the surface of the license plate located at the first signing station 4, and the second signing device 2 signs the second identification information on the surface of the license plate located at the second signing station. The first identification information is a special character, and the second identification information is a two-dimensional code and a serial number. The first identification information and the second identification information are located at the upper left corner of the license plate. The lighting device 3 is located before the first signing device 1, and the lighting device 3 provides light for the first signing device 1 to sign the license plate. Specifically, the lighting device 3 includes multiple surface light sources facing different directions. The surface light source is used instead of the traditional point light source as the supplementary light source when the license plate is photographed, so that the light can fall more evenly on the license plate when it is photographed, and a high-quality image is obtained. In addition, a CCD camera is installed inside the lighting device 3, which is used to photograph the reflective film on the surface of the license plate and upload it to the control system. The identification of the reflective film of the manufacturer who needs to sign is stored in the control system. The control system determines whether the license plate located at the first signing station 4 can be signed based on the license plate information collected by photographing. If yes, the first signing device 1 and the second signing device 2 are controlled to sign. If not, the first signing device 1 and the second signing device 2 are not controlled to sign. The identification of the reflective film is the identification provided on the surface of the reflective film for identification, which is arranged at the middle or periphery of the reflective film. The identification of the reflective film can be the trademark of the reflective film manufacturer, the model, color or other characteristic identification of the reflective film. Finally, the license plate is signed by the first signing device 1 and the second signing device 2 to complete the first identification and the second identification, and is output from the workbench 5.

[0037] The above merely describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, some modifications and improvements can be made, and these all belong to the protection scope of the present application.

Claims

1. A number plate signing device, characterised in that, The utility model relates to a license plate signing device, including: First signing device, first signing device have support, support top install laser emission device for emitting laser beam, support middle part fixed have mobile platform, mobile platform with automatic displacement device connection and drive automatic displacement device along vertical direction up and down, automatic displacement device is used for carrying diffusion sheet and adjusting diffusion sheet in horizontal direction displacement, automatic displacement device below fixed have imaging lens, laser beam after diffusion sheet increases diffusion angle by imaging lens converging, through the imaging lens on license plate signs first identification information.

2. The license plate signing device of claim 1, wherein Automatic displacement device and control system electricity are connected, and automatic displacement device includes the motor of installation in mobile platform, the output shaft of motor is connected with the one end of rotating shaft, and the other end of rotating shaft is installed in the clamping seat, and the clamping seat is fixed on the support plate, and the sliding block is installed below the support plate, and rotating shaft rotates and drives the sliding block to slide on the guide rail, and when the sliding block moves, the diffusion sheet located above the support plate occurs displacement along the direction parallel to the guide rail.

3. A number plate signing device according to claim 2, characterised in that, The support plate is provided with a diffusion sheet fixing frame above, and the diffusion sheet is tightly fixed inside the diffusion sheet fixing frame.

4. The license plate signing device of claim 2, wherein The sliding block is further provided with a sensor outside, and the sensor is used for monitoring the displacement distance of the automatic displacement device.

5. The license plate signing apparatus of claim 1, wherein The license plate signing device further comprises a detection device located between the laser emission device and the diffusion sheet, which is used for collecting the structure of the laser beam passing through the surface of the diffusion sheet and uploading it to the control system.

6. The license plate signing apparatus of claim 1, wherein The diffusion sheet is provided with two pieces, and the two pieces of diffusion sheet are arranged in high and low positions.

7. The license plate signing apparatus of claim 1, wherein The diffusion sheet is an optical device with diffusion effect, which is selected from but not limited to any one of roughened optical glass, optical grating, microlens array or cylindrical lens array.

8. A number plate signing system characterised by, The utility model relates to a license plate signing device, including: Workbench for placing and transmitting license plate, workbench is provided with first signing device and second signing device in proper order, first signing device signs first identification information to the license plate surface located in first signing station, second signing device signs second identification information to the license plate surface located in second signing station, and first identification information includes special character, and second identification information includes two-dimensional code and serial number; Wherein, first signing device has support, support top install laser emission device, and laser beam is shot by laser emission device, support middle part fixed have mobile platform, mobile platform with automatic displacement device connection and drive automatic displacement device along vertical direction up and down, automatic displacement device is used for adjusting diffusion sheet in horizontal direction displacement, and automatic displacement device below fixed have imaging lens, and laser beam after diffusion sheet increases diffusion angle by imaging lens converging, through the imaging lens on license plate signs first identification information.

9. The number plate signage system of claim 8, wherein, The automatic displacement device is electrically connected with the control system, the automatic displacement device comprises a motor installed on the moving platform, an output shaft of the motor is connected with one end of a rotating shaft, the other end of the rotating shaft is installed in a clamping seat, the clamping seat is fixed on a support plate, a sliding block is installed below the support plate, the sliding block is slidably connected with a guide rail, the guide rail is horizontally arranged, when the sliding block moves, the diffusion sheet is displaced along a parallel direction of the guide rail, a diffusion sheet fixing frame is arranged above the support plate, and the diffusion sheet is tightly fixed in the diffusion sheet fixing frame; A sensor is further installed outside the sliding block, and the sensor is used for monitoring the displacement distance of the automatic displacement device; The license plate signing device further comprises a detection device located between the laser emitting device and the diffusion sheet, which is used for collecting the structure of the laser beam passing through the surface of the diffusion sheet and uploading it to the control system.

10. The license plate signing system of claim 8, wherein, The license plate signing system further comprises an illuminating device located in front of the first signing device, which provides light for the first signing device to sign the license plate, and a CCD camera is further installed in the illuminating device, which is used for shooting the reflective film on the surface of the license plate and uploading it to the control system, so as to determine whether the license plate located at the first signing station can be signed.

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