License plate recognition and verification device

Abstract

The utility model provides a license plate recognition and verification device. The license plate recognition and verification device comprises a case, a shooting platform arranged in the case, and a light supplementing device and a camera which are matched with the shooting platform, the light supplementing device comprises a light guide plate covering the shooting platform in an arc shape and a lamp strip arranged along the edge of the light guide plate, and the camera is located at the top of the light guide plate and connected with the signal receiving and processing equipment; according to the technical scheme, the light supplementing device of the license plate recognition device is mainly designed to be arranged on the shooting platform in an arc-shaped covering mode, light supplementing is conducted on the license plate to be shot, the edge of the light guide plate is provided with the lamp strip, light rays evenly and softly irradiate the surface of the license plate along the light guide plate, overexposure is avoided when a camera located at the top of the light guide plate shoots images, and the shooting quality is improved. Imaging is clear; and the shooting platform can be matched with a sliding rail, so that the license plate can be automatically sent to the position below the light supplementing device for shooting after the user places the license plate.

Description

Technical Field

[0001] The utility model relates to a license plate recognition and verification device. Background Art

[0002] At present, the time-based charging devices for parking on roads, in shopping malls, and in residential areas have been basically popularized, and the recognition devices with functions such as license plate entry, recognition, and verification have been widely used; after the existing license plates are processed in the vehicle number plate production center, they also need to be inspected, photographed, scanned, and verified by an algorithm before being entered into the number plate production system, and those that do not pass will not be entered; the existing devices for quality inspection and scanning usually include a box body with a camera inside, and a lighting device is arranged inside the box body to make the license plate clearly displayed during photographing, scanning, and entry.

[0003] The applicant of the present invention improves the design of this license plate recognition device for quality inspection and photographing, so that the imaged license plate is clear, overexposure is avoided, the algorithm verification is accurate, and the entry system is convenient. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and to provide a license plate recognition and verification device. The technical solution adopted by the utility model is as follows:

[0005] A license plate recognition and verification device includes a chassis, a shooting platform arranged inside the chassis, a supplementary lighting device cooperating with the shooting platform, and a camera; the supplementary lighting device includes a light guide plate covering the shooting platform in an arc shape and a light strip arranged along the edge of the light guide plate. The camera is located at the top of the light guide plate and is connected to a signal receiving and processing device. The signal receiving and processing device can be a computer with recognition and verification software. Regarding the recognition and verification algorithm, it can be an existing algorithm for license plate recognition and verification, or a new algorithm developed according to verification requirements.

[0006] Preferably, the light guide plate is in the shape of a C-shaped plate covering above the shooting platform, and a through hole for the camera to extend into is opened at the middle position of the top of the light guide plate.

[0007] Preferably, brackets are arranged on both side edges of the light guide plate, and the light strip is arranged between the brackets and the light guide plate.

[0008] Preferably, both ends of the bracket are connected to the chassis through positioning plates. The two ends of the bracket extend into the positioning grooves on the positioning plates and are detachably connected to the positioning grooves, so as to facilitate the installation or replacement of the supplementary lighting device.

[0009] Preferably, brackets are arranged on both side edges of the light guide plate, and the cross-section of the bracket is in the shape of a C covering the light strip and the edge of the light guide plate.

[0010] Preferably, the brackets on both sides of the light guide plate are connected and positioned with each other through a positioning cross bar.

[0011] Preferably, the shooting platform includes a positioning table and a slide rail. The slide rail is used to convey the positioning table to the placement station outside the chassis and convey the positioning table to the shooting station inside the chassis. The positioning table and the slide rail can be manually pulled out or sent into the chassis, or can be automatically extended and retracted by a mechanical driving device through a set program.

[0012] Preferably, the positioning table has a positioning groove, and the shape of the positioning groove exactly matches the standard shape of the license plate, so as to place the license plate to be quality inspected and accurately position it at the best shooting position.

[0013] Preferably, a display screen is arranged on the chassis, and the display screen is signal-connected to the signal receiving and processing device to display the image information captured by the camera.

[0014] Preferably, a ventilation and heat dissipation port is also arranged on the chassis.

[0015] The beneficial effects of the present utility model are as follows: The technical solution mainly designs the supplementary light device of the license plate recognition device, so that it is arranged in an arc shape on the shooting platform to supplement light to the license plate to be photographed, and a light strip is arranged on the edge of the light guide plate, so that the light is evenly and softly irradiated on the license plate surface along the light guide plate, so as to avoid overexposure when the camera located at the top of the light guide plate takes an image, and the image is clear, so as to accurately identify and verify the captured image by using an algorithm; Further, the shooting platform is provided with a slide rail in cooperation, which is convenient for the user to place the license plate and then automatically send the license plate to the position below the supplementary light device for shooting. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0017] Figure 1 It is a schematic external view of Embodiment 1;

[0018] Figure 2 It is a schematic structural view of the supplementary light device and the shooting platform in Embodiment 1;

[0019] Figure 3 It is an exploded structure view of Embodiment 1;

[0020] Figure 4 For Figure 3 the enlarged view at B in

[0021] Figure 5 ForFigure 2 Enlarged view at position A

[0022] In the figure, 1 is the chassis, 11 is the display screen, 12 is the telescopic port, 13 is the ventilation and heat dissipation port, 2 is the shooting platform, 21 is the positioning platform, 22 is the slide rail, 3 is the supplementary light device, 31 is the light guide plate, 32 is the light strip, 33 is the bracket, 34 is the positioning plate, 35 is the positioning cross bar, and 4 is the camera. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] It should be noted that the directional and positional terms mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "side", etc., are only with reference to the directions or positions in the accompanying drawings. Therefore, the directional and positional terms used are for explaining and understanding the present utility model, rather than limiting the protection scope of the present utility model.

[0025] Embodiment 1

[0026] As Figures 1-5 shown, a license plate recognition and verification device includes a chassis 1, a shooting platform 2 arranged inside the chassis 1, a supplementary light device 3 cooperating with the shooting platform 2, and a camera 4; the supplementary light device 3 includes a light guide plate 31 (made of acrylic material) covering the shooting platform 2 in an arc shape and a light strip 32 arranged along the edge of the light guide plate 31, and the camera 4 is located at the top of the light guide plate 31 and is connected to a signal receiving and processing device.

[0027] The light guide plate 31 is in the shape of a C-shaped plate covering above the shooting platform 2, and a through hole for the camera 4 to extend into is opened at the top of the light guide plate 31.

[0028] A bracket 33 is arranged on the edge of the light guide plate 31, and the light strip 32 is arranged between the bracket 33 and the light guide plate 31; the bracket 33 is connected to the chassis 1 through a positioning plate 34, and both ends of the bracket 33 extend into the positioning grooves on the positioning plate 34 and are detachably connected to the positioning grooves; in this embodiment, waist-shaped holes are opened on both sides of the positioning groove, screw holes are arranged at both ends of the bracket 33, and the screw holes are connected to the waist-shaped holes through bolts.

[0029] Furthermore, brackets 33 are arranged on both side edges of the light guide plate 31, the cross section of the bracket 33 is in the shape of a C covering the light strip 32 and the edge of the light guide plate 31, and the brackets 33 on both sides of the light guide plate 31 are connected and positioned with each other through a positioning cross bar 35 to make its installation stable.

[0030] Further, the photographing platform 2 includes a positioning table 21 and a slide rail 22. The slide rail 22 is used to convey the positioning table 21 to the placement station outside the chassis 1 and convey the positioning table 21 to the photographing station inside the chassis 1. In this device, the automatic expansion and contraction of the positioning table 21 is completed by setting a program and using a mechanical driving device. When in use, the operator only needs to place the license plate on the positioning table 21, press the button, and the positioning table automatically retracts from the telescopic opening 12 of the chassis 1 to under the supplementary lighting device for photographing. After the photographing is completed, the positioning table 21 automatically extends from the telescopic opening 12, facilitating the operator to take away the photographed license plate and place the next license plate to be photographed.

[0031] Further, the positioning table 21 has a positioning groove, and the shape of the positioning groove exactly matches the standard shape of the license plate, so as to place the license plate to be quality inspected and accurately position it at the best photographing position. 。

[0032] A display screen 11 is arranged on the chassis 1. The display screen 11 is signal-connected to the signal receiving and processing device to display the image information captured by the camera 4. Moreover, a ventilation and heat dissipation opening 13 is also arranged on the chassis 1.

[0033] The foregoing disclosure is only for the preferred embodiments of the present invention, and of course, it cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A license plate recognition and verification device, characterized in that: It comprises a chassis (1), a shooting platform (2) arranged inside the chassis (1), a fill light device (3) and a camera (4) matched with the shooting platform (2); The fill light device (3) comprises a light guide plate (31) arranged in an arc shape on the shooting platform (2) and a light strip (32) arranged along the edge of the light guide plate (31); the camera (4) is located on the top of the light guide plate (31) and is connected to a signal receiving and processing device.

2. A license plate recognition and verification device according to claim 1, characterized in that: The light guide plate (31) is a C-shaped plate cover arranged above the shooting platform (2), and a through hole is provided on the top of the light guide plate (31) for the camera (4) to extend into.

3. A license plate recognition and verification device according to claim 1, characterized in that: A bracket (33) is arranged at the edge of the light guide plate (31), and the light strip (32) is arranged between the bracket (33) and the light guide plate (31).

4. A license plate recognition and verification device according to claim 3, characterized in that: The bracket (33) is connected to the chassis (1) via a positioning plate (34), and both ends of the bracket (33) extend into positioning grooves on the positioning plate (34) and are detachably connected to the positioning grooves.

5. A license plate recognition and verification device according to claim 3, characterized in that: Brackets (33) are provided on both side edges of the light guide plate (31); the cross section of the bracket (33) is C-shaped and covers the light strip (32) and the edge of the light guide plate (31).

6. A license plate recognition and verification device according to claim 5, characterized in that: The brackets (33) on both sides of the light guide plate (31) are connected and positioned relative to each other via a positioning crossbar (35).

7. A license plate recognition and verification device according to claim 1, characterized in that: The shooting platform (2) comprises a positioning platform (21) and a slide rail (22), wherein the slide rail (22) is used to transport the positioning platform (21) to a placement station outside the chassis (1) and to transport the positioning platform (21) to a shooting station inside the chassis (1).

8. A license plate recognition and verification device according to claim 7, characterized in that: The positioning platform (21) is provided with a positioning groove, the shape of which is exactly matched with the standard shape of the license plate.

9. A license plate recognition and verification device according to claim 1, characterized in that: A display screen (11) is provided on the chassis (1), and the display screen (11) is connected to a signal receiving and processing device for displaying image information captured by the camera (4).

10. A license plate recognition and verification device according to claim 1, characterized in that: The chassis (1) is also provided with ventilation and heat dissipation openings (13).

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