License plate verification device

Abstract

The utility model discloses a license plate verification device, which comprises a box body, a CPU (Central Processing Unit) host positioned in the box body, a display screen arranged on the front surface of the box body, a start button and an emergency stop button, and is characterized in that a translation type verification table is arranged below the display screen, a verification chamber is arranged in the box body, the verification table is fixed on a translation mechanism positioned at the bottom of the verification chamber, and the CPU host is connected with the CPU host. The bottom of the verification chamber is provided with a view finding outer frame located over the verification table, and the top of the verification chamber is provided with a camera recognition assembly connected with the CPU host. The device is simple in structure, small in size, small in occupied space, stable in vibration prevention, reliable in operation, rapid in license plate input and output, convenient to operate, independent in verification room, capable of avoiding external interference, high in lighting effect, small in natural glare of lamplight, accurate and efficient in reading, low in error rate and long in service life.

Description

Technical Field

[0001] The utility model relates to a motor vehicle license plate inspection technology, in particular to a verification device used in the production process of license plates, factory inspection, and before license plates are issued. Background Art

[0002] Motor vehicle license plates are the legal identification for vehicles on the road. Before use, their style and information must be inspected. To prevent counterfeiting, each vehicle has a unique license plate, serving as its own identification card. Only after passing verification can they be issued. Public security agencies can also scan license plates using special equipment to obtain information about the vehicle's owner.

[0003] Currently, the license plate verification devices disclosed in the art mainly include the following forms. For example, patent publication number CN116663583A discloses a license plate verification device and method, which includes a verification chamber in the middle of a frame, a rotating verification table on the lower surface of the verification chamber, a camera recognition component on the top, and a display screen on the rear side wall of the verification chamber; the frame is also provided with a card output bin below the rotating verification table. Another example is patent announcement number CN 219378057U, which includes a frame workbench, which is arranged on the frame for conveying and detecting license plates thereon, a license plate information collection device for collecting license plate images, an information transmission and comparison device for transmitting images and comparing them with the Ministry of Public Security database, a conveying device arranged on the workbench for conveying license plates, and a rejection device arranged on the side of the conveying device for removing unqualified license plates.

[0004] Among the above-mentioned public technologies, the former is designed with a rotating verification table, and there may be a large deviation in the photo-taking point during use, resulting in deviation in the obtained information; while the latter device is designed with a belt drive, which also has the uncertainty of the photo-taking point and a large deviation in information collection. In addition, it uses a suction cup to extract unqualified license plates, which lacks stability and increases the amount of repeated checks. Summary of the Invention

[0005] The purpose of this utility model is to solve the above problems and provide a license plate verification device, which has the characteristics of accurate reading, high efficiency, low error rate, simple structure and reliable operation, independent verification room, no external interference, image denoising, easy operation, low labor intensity, and compact size.

[0006] The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions: a license plate verification device, comprising a box body, a CPU host located in the box body, a display screen and a start button and an emergency stop button on the front of the box body, and is characterized in that a translational verification table is provided below the display screen, a verification room is provided in the box body, the verification table is connected to a translation mechanism located at the bottom of the verification room, a framing frame is provided at the bottom of the verification room and is located directly above the verification table, and a camera recognition component connected to the CPU host is provided at the top of the verification room.

[0007] In the aforementioned license plate verification device, preferably, the translation mechanism includes a supporting plate for supporting the verification table, a nut is provided at the bottom of the supporting plate, the nut cooperates with a screw fixed to the bottom of the box, and a motor is provided at the end of the screw.

[0008] In the aforementioned license plate verification device, preferably, the verification table is provided with upwardly bent edges on both sides of the verification chamber and on the inside of the verification chamber, and the height of the folded edges is adapted to the thickness of the license plate.

[0009] In the aforementioned license plate verification device, preferably, the viewfinder outer frame has a rectangular opening that is greater than or equal to the length and width of the license plate.

[0010] In the aforementioned license plate verification device, preferably, the verification room is composed of panels arranged on the left, right and rear, and a top cover assembly to form an independent photo room space, and the camera recognition assembly is fixed at the center of the top cover assembly.

[0011] In the aforementioned license plate verification device, preferably, the CPU host is arranged at the back of the verification room, and a network cable connector, a USB connector and a power cable connector are provided on the back of the box.

[0012] In the aforementioned license plate verification device, preferably, a front light source is provided at the front end of the viewfinder outer frame.

[0013] In the aforementioned license plate verification device, preferably, a warning light is provided on the top of the box.

[0014] In the aforementioned license plate verification device, preferably, the inner surface of the verification chamber is coated with a nanometer high diffuse reflection paint layer.

[0015] In the aforementioned license plate verification device, preferably, heat dissipation holes are provided on both sides and the back of the box; and rubber pads are provided on the bottom of the box.

[0016] This technical solution centralizes the entire license plate verification process within a compact enclosure, equipped with a separate verification chamber. License plates are input and output via a translation mechanism at the bottom of the verification chamber. The CPU and camera recognition components within the chamber automatically verify the license plate's eligibility and display the information to the operator on a display screen. Since verification time is measured in seconds, the single-door entry and exit of the translation mechanism does not affect operational efficiency. Instead, it significantly simplifies the complex internal structure of the assembly line and reduces the risk of mechanical failure. The independent verification chamber eliminates external interference and facilitates image denoising.

[0017] The device's start button, emergency stop button, and panning calibration table, among other operating points, are all located near the touchscreen display, ergonomically designed for ease of operation. A framing frame is located at the bottom of the calibration chamber, providing a black background for the camera recognition components, magnifying the workbench (calibration table) on the panning mechanism, and providing a reference for calibration and framing the capture range.

[0018] This solution features a screw-nut-driven translation mechanism that operates smoothly, delivering both input and output in one step. This structure offers a long service life and minimal wear, while also ensuring the accuracy of the license plate capture points remains unchanged over time. Maintenance is also minimal. The verification table also features positioning hems, customizable to the size of the license plate, making it easy for operators to position and align the license plate being verified.

[0019] In addition, the device is also equipped with a front light source at the front end of the viewfinder frame to supplement and adjust the brightness of the shooting area; a warning light is provided on the box to prompt whether the verification is completed; and shock-proof rubber pads are provided at the bottom of the box.

[0020] Therefore, compared with the existing technology, the beneficial effects of the present invention are: simple structure, compact size, small space occupation, shockproof and stable, reliable operation, fast license plate input and output, easy operation, independent verification room, avoidance of external interference, image denoising, high light efficiency, less natural glare from light, accurate and efficient reading, low error rate, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the appearance structure of the utility model.

[0022] Figure 2 yes Figure 1 Another angle view of .

[0023] Figure 3 It is a main view of the present utility model.

[0024] Figure 4 yes Figure 3 Right view of .

[0025] Figure 5This is a schematic diagram of the main structure of a translation mechanism of the present utility model.

[0026] Figure 6 yes Figure 5 Top view of .

[0027] Figure 7 yes Figure 5 Right view of .

[0028] In the figure: 1-box, 2-calibration table, 3-display screen, 4-warning light, 5-license plate, 6-start button, 7-emergency stop button, 8-translation mechanism, 801-support plate, 802-motor, 803-screw, 804-nut, 9-front light source, 10-top cover assembly, 11-enclosure, 12-viewfinder frame, 13-network cable connector, 14-USB connector, 15-cable connector. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be further specifically described below with reference to embodiments and in conjunction with the accompanying drawings.

[0030] This embodiment provides a license plate verification device, such as Figure 1 、 Figure 2 、 Figure 3 As shown, a box 1 is provided, a 15-inch touch screen 3 is arranged in the center of the front of the box 1, a start button 6 and an emergency stop button 7 are arranged side by side at the lower right side of the screen 3, a warning light 4 is provided on the top edge of the box 1, the warning light 4 is red and always on with sound, DC24V; heat dissipation holes are provided on both sides and the back of the box 1; four rubber pads are provided on the bottom of the box 1.

[0031] An independent verification room is provided in the box 1. The verification room is composed of the enclosures 11 arranged on the left, right, front and back, and the top cover assembly 10 to form an independent photo room space. All surfaces in the verification room are coated with a nanometer high diffuse reflective coating layer to improve the lighting efficiency of the lamps, reduce glare, and save energy. The camera recognition component 16 connected to the CPU host is fixed in the center of the top cover assembly 10. The camera recognition component 16 includes a CE120-10UC camera. The CPU host is arranged at the back of the verification room in the box 1 and is fixed by positioning angle codes. The back of the box 1 is also arranged with a network cable connector 13, a USB connector 14 and a cable connector 15, such as Figure 4 shown.

[0032] A translational calibration table 2 is provided below the display screen 3. The calibration table 2 is fixed on a translation mechanism 8 located at the bottom of the calibration room. A framing frame 12 is provided at the bottom of the calibration room just above the calibration table. Figures 5 to 7 The framing frame 12 has a rectangular opening that is greater than or equal to the length and width of the license plate 5, and an LED front light source 9 is provided at the front end of the framing frame 12.

[0033] The translation mechanism 8 includes a support plate 801 that supports and fixes the calibration table 2. A nut 804 is provided at the bottom of the support plate 801. The nut 804 cooperates with a screw 803 fixed at the bottom of the box 1. A motor 802 is provided at the end of the screw 803. The head and tail (one end of the motor) of the screw 803 are both provided with support bearing seats.

[0034] The verification table 2 is provided with upwardly bent edges on both sides of the verification room and on three sides of the inner side of the verification room, and the height of the folded edges is adapted to the thickness of the license plate 5.

[0035] During operation, the translation mechanism 8 is activated, allowing the verification platform 2 to extend from the housing 1. The license plate 5 to be verified is placed on the verification platform 2, with the font side facing up. The translation mechanism 8 is then activated again, and the verification platform 2 carrying the license plate 5 is transported into the verification chamber. The start button 6 is then activated to begin verification. If the license plate passes, the platform automatically exits. If the license plate fails, the warning light 4 illuminates. After verification, the translation mechanism 8 pushes the verification platform 2 out, and the license plate 5 is removed, completing the verification process.

[0036] The above-mentioned action can be repeated for further re-inspection to holding an uncertain license plate 5. If a fault occurs, the emergency stop button 7 can be pressed to pause.

[0037] The software system in this embodiment is based on image processing and pattern recognition technologies. When a license plate 5 is photographed, the system preprocesses the image, including grayscale conversion and binarization, to better identify the text within. The processed image is then segmented, distinguishing between text and non-text areas, and identifying the position and shape of each character. Feature extraction and pattern matching are then performed on each character, and the best matching character information is found by comparing it against a library of known character templates.

[0038] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Without departing from the principles of the present technical solution, any equivalent changes or modifications made in accordance with the technical ideas proposed in the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A license plate verification device, comprising a housing (1), a CPU host located in the housing, a display screen (3), a start button (6), and an emergency stop button (7) on the front of the housing, wherein the device is characterized in that A translational check table (2) is provided below the display screen, a check room is provided in the box, the check table is connected to a translation mechanism (8) located at the bottom of the check room, a viewfinder outer frame (12) is provided at the bottom of the check room and is located directly above the check table, and a camera recognition component (16) connected to a CPU host is provided at the top of the check room.

2. A license plate verification device according to claim 1, characterized in that: The translation mechanism (8) includes a supporting plate (801) supporting the calibration table (2), a nut (804) is provided at the bottom of the supporting plate, the nut cooperates with a screw (803) fixed at the bottom of the box (1), and a motor (802) is provided at the end of the screw.

3. A license plate verification device according to claim 2, characterized in that: The verification table (2) is provided with upwardly bent edges on both sides of the verification room and on the inner side of the verification room, and the height of the folded edges is adapted to the thickness of the license plate (5).

4. A license plate verification device according to claim 1, characterized in that: The framing outer frame (12) has a rectangular opening that is greater than or equal to the length and width of the license plate (5).

5. A license plate verification device according to claim 1, characterized in that: The verification room is composed of enclosures (11) arranged on the left, right and rear, and a top cover assembly (10) on the top to form an independent photo room space, and the camera recognition assembly (16) is fixed at the center of the top cover assembly.

6. A license plate verification device according to claim 1 or 5, characterized in that: The CPU host is arranged at the back of the verification room, and a network cable connector (13), a USB connector (14) and a cable connector (15) are arranged at the back of the box (1).

7. A license plate verification device according to claim 1 or 4, characterized in that: A front light source (9) is provided at the front end of the viewfinder outer frame (12).

8. A license plate verification device according to claim 1, 2, 3, 4 or 5, characterized in that: A warning light (4) is provided on the top of the box (1).

9. A license plate verification device according to claim 1, 2, 3, 4 or 5, characterized in that: The inner surface of the calibration chamber is coated with a nanometer high diffuse reflection paint layer.

10. A license plate verification device according to claim 1, 2, 3, 4 or 5, characterized in that: The box body (1) is provided with heat dissipation holes on both sides and the back thereof; and rubber pads are provided on the bottom of the box body.

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