Angle-adjustable license plate recognition device

Abstract

The utility model relates to the technical field of recognition devices, in particular to an angle-adjustable license plate recognition device. The technical problem is that when an existing license plate recognition device is used in an actual scene, a vehicle may drive into a recognition area at various angles and postures, so that a license plate may incline in an image, and the recognition accuracy is affected. According to the technical scheme, the angle-adjustable license plate recognition device comprises a lifting assembly, a rotating assembly, a recognition assembly and an illumination assembly, after a camera body is close to a vehicle license plate, a T-shaped sliding block drives a second rotating ring sleeve to be in sliding connection with a supporting column along a T-shaped sliding groove through the action of an infrared distance detector and the driving of a driver, and the angle-adjustable license plate recognition device is used for recognizing the license plate. And then through driving of the driver, the second rotating shaft drives the camera body to rotate along the second rotating ring sleeve to be parallel to the ground, so that the camera body can identify the vehicle license plate more effectively.

Description

Technical Field

[0001] The utility model relates to the technical field of recognition devices, in particular to a license plate recognition device with adjustable angle. Background Art

[0002] The license plate recognition device is a high-tech product, which is mainly used to identify the text and numbers on the vehicle license plate. This device is usually used in the fields of intelligent transportation systems, parking lot management systems, road monitoring systems, etc. Through image processing, pattern recognition and other technologies, it can realize the automatic positioning, segmentation, recognition and verification of the vehicle license plate. The core part of the license plate recognition device is a license plate recognition algorithm, which can analyze the image captured by the camera, extract the license plate area from it, and accurately recognize the characters on the license plate. In some advanced license plate recognition systems, the device can also handle complex situations such as license plate obstruction, lighting changes, and license plate damage to improve the accuracy and reliability of recognition. When the existing license plate recognition device is used in actual scenarios, since the vehicle may enter the recognition area at various angles and postures, it may cause the license plate to appear tilted in the image, thereby affecting the recognition accuracy; therefore, we propose an angle-adjustable license plate recognition device to solve the above-mentioned problems. Utility Model Content

[0003] In order to overcome the problem that when the existing license plate recognition device is used in actual scenarios, the vehicle may enter the recognition area at various angles and postures, which may cause the license plate to appear tilted in the image, thereby affecting the recognition accuracy.

[0004] The technical solution of the utility model is: an angle-adjustable license plate recognition device, comprising a lifting component, a rotating component, a recognition component and a lighting component; a lifting component is installed at one end of the rotating component for driving the rotating component to adjust the height according to the height of the vehicle, and an end of the rotating component away from the lifting component is provided with a recognition component that can slide and move laterally according to the position of the vehicle license plate; a lighting component is provided below the recognition component for providing light to avoid unclear recognition by the recognition component and the rear end of the lighting component is slidably connected to the rotating component.

[0005] Preferably, when the height adjustment is completed, the distance between the vehicle and the camera body is detected by the infrared distance detector and fed back to the background, and then driven by the first motor, the first rotating shaft drives the connecting column to rotate along the first rotating ring sleeve, and then driven by the second motor, the guide column rotates through the first rotating shaft and the connecting column, and finally driven by the third motor, the support column rotates through the second rotating shaft and the guide column, thereby bringing the camera body close to the license plate to prevent the vehicle from entering the recognition area at various angles and postures, affecting the recognition accuracy. When the camera body is close to the license plate, through the action of the infrared distance detector and the drive of the driver, the T-shaped slider drives the second rotating ring sleeve to slide and connect with the support column along the T-shaped slide groove, so that the camera body is aligned with the vehicle license plate. Then, driven by the driver, the second rotating shaft drives the camera body to rotate along the second rotating ring sleeve to be parallel to the ground, which facilitates the camera body to more effectively identify the vehicle license plate.

[0006] Preferably, the lifting assembly includes a mounting plate, a telescopic column, a telescopic sleeve, a display panel and a cylinder. The display panel is installed on one side of the telescopic sleeve, the cylinder is installed on the upper end of the telescopic sleeve, the telescopic column is arranged inside the telescopic sleeve, the mounting plate is installed on the lower end of the telescopic column, and mounting holes for bolts to pass through are opened at the corners of the mounting plate. The mounting plate is fixed to the ground by passing the bolts through the mounting holes. Then, the detected vehicle height is fed back to the background through the action of the infrared distance detector. Then, the telescopic sleeve drives the camera body to move to a suitable height along the telescopic column through the drive of the cylinder. When the camera body has recognized the vehicle license plate, all the information is displayed on the display panel.

[0007] Preferably, the rotating assembly includes a first rotating ring sleeve, a first rotating shaft, a first motor, a connecting column, a first rotating shaft, a second motor, a guide column, a second rotating shaft, a third motor and a supporting column. The first rotating shaft is passed through one end of the connecting column, and the first rotating shaft is externally sleeved on one end of the first rotating shaft with a first rotating ring sleeve fixedly connected to the telescopic sleeve. The first motor is installed on the end of the first rotating shaft away from the first rotating ring sleeve. The distance between the vehicle and the camera body is detected by an infrared distance detector and fed back to the background. Then, the first rotating shaft drives the connecting column to rotate along the first rotating ring sleeve through the drive of the first motor.

[0008] Preferably, a first rotating shaft is installed at one end of the connecting column away from the first rotating shaft, a second motor is installed on one side of the first rotating shaft, the guide column is rotatably connected to the connecting column through the first rotating shaft, a second rotating shaft is installed at one end of the guide column away from the first rotating shaft, and then the guide column is driven by the second motor to rotate through the first rotating shaft and the connecting column, and finally the support column is driven by the third motor to rotate through the second rotating shaft and the guide column.

[0009] Preferably, a third motor is installed on one side of the second rotating shaft, and the support column is rotatably connected to the guide column through the second rotating shaft. A T-shaped slide groove is provided on one side of the support column for sliding of the identification component, and a rectangular slide groove is provided on the side of the support column away from the T-shaped slide groove for sliding of the illumination component. In this way, the camera body is brought close to the license plate to prevent the vehicle from entering the identification area at various angles and postures, which affects the accuracy of the identification. When the identification is completed, the connecting column, the guide column and the support column are rotated and retracted to avoid affecting the vehicle's exit.

[0010] Preferably, the identification component includes a T-shaped slider, a second rotating ring sleeve, a second rotating axis, a camera body and an infrared distance detector. A T-shaped slider is installed on one side of the second rotating ring sleeve, and the T-shaped slider drives the second rotating ring sleeve to slide along the T-shaped groove and connect with the support column. The second rotating axis is installed inside the second rotating ring sleeve, and the camera body is installed on the side of the second rotating axis away from the second rotating ring sleeve. The infrared distance detector is installed on the end of the camera body away from the second rotating axis. A driver is installed inside the T-shaped slider and the second rotating axis. When the camera body approaches a license plate, the T-shaped slider drives the second rotating ring sleeve to slide along the T-shaped groove and connect with the support column through the action of the infrared distance detector and the drive of the driver, so that the camera body is aligned with the vehicle license plate. Then, through the drive of the driver, the second rotating axis drives the camera body to rotate along the second rotating ring sleeve to be parallel to the ground, so that the camera body can more effectively identify the vehicle license plate.

[0011] Preferably, the lighting assembly includes a rectangular slider, an L-shaped support frame, a connecting shaft and a lighting lamp body, a rectangular slider is installed at one end of the L-shaped support frame, a driver is installed inside the rectangular slider, the rectangular slider drives the L-shaped support frame to slide along the rectangular slide groove and connect with the support column, a connecting shaft is installed at one end of the L-shaped support frame away from the rectangular slider, the lighting lamp body is rotatably connected to the L-shaped support frame through the connecting shaft, and a driver is installed on one side of the connecting shaft, according to the position of the camera body, the rectangular slider drives the L-shaped support frame to slide along the rectangular slide groove and connect with the support column through the drive until the lighting lamp body moves to the bottom of the camera body, and then according to the height of the vehicle license plate, the lighting lamp body is rotated to a suitable angle through the connecting shaft and the L-shaped support frame, so as to facilitate the camera body to identify the vehicle license plate.

[0012] Beneficial effects of the utility model:

[0013] 1. According to the previous license plate recognition device used in actual scenes, since the vehicle may enter the recognition area at various angles and postures, the license plate may be tilted in the image, thereby affecting the recognition accuracy. The difference is that after the height adjustment is completed, the distance between the vehicle and the camera body is detected by the infrared distance detector and fed back to the background. Then, through the drive of the first motor, the first rotating shaft drives the connecting column to rotate along the first rotating ring sleeve, and then through the drive of the second motor, the guide column rotates through the first rotating shaft and the connecting column. Finally, through the drive of the third motor, the support column rotates through the second rotating shaft and the guide column, thereby bringing the camera body close to the license plate to prevent the vehicle from entering the recognition area at various angles and postures, affecting the recognition accuracy. When the camera body is close to the license plate, through the infrared distance detector, through the drive of the driver, the T-shaped slider drives the second rotating ring sleeve to slide and connect with the support column along the T-shaped slide groove, so that the camera body is aligned with the vehicle license plate. Then, through the drive of the driver, the second rotating shaft drives the camera body to rotate along the second rotating ring sleeve to be parallel to the ground, so that the camera body can more effectively recognize the vehicle license plate.

[0014] 2. According to the location of the camera body, the rectangular slider drives the L-shaped support frame to slide along the rectangular slide groove and connect with the support column through the driver until the lighting body moves to the bottom of the camera body. Then, according to the height of the vehicle license plate, the lighting body is connected to the L-shaped support frame through the shaft to rotate to a suitable angle, so that the camera body can identify the vehicle license plate. When the camera body has identified the vehicle license plate, all the information is displayed on the display panel. Then the connecting column, guide column and support column are rotated and retracted to avoid affecting the vehicle's exit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the lifting assembly structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the connecting column structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the guide column structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the identification component structure of the utility model;

[0020] Figure 6 It is a schematic diagram of the structure of the lighting component of the utility model.

[0021] Explanation of the accompanying drawings: 1. lifting component; 2. rotating component; 3. identification component; 4. illumination component; 101. mounting plate; 102. mounting hole; 103. telescopic column; 104. telescopic sleeve; 105. display panel; 106. cylinder; 201. first rotating ring sleeve; 202. first rotating shaft; 203. first motor; 204. connecting column; 205. first rotating shaft; 206. second motor; 207. guide column; 208. second rotating shaft; 209. third motor; 210. supporting column; 211. T-shaped slide groove; 212. rectangular slide groove; 301. T-shaped slider; 302. second rotating ring sleeve; 303. second rotating shaft; 304. camera body; 305. infrared distance detector; 401. rectangular slider; 402. L-shaped support frame; 403. connecting shaft; 404. lighting lamp body. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] See also Figure 1-2 The utility model provides an embodiment: an angle-adjustable license plate recognition device, comprising a lifting component 1, a rotating component 2, a recognition component 3 and an illumination component 4; a lifting component 1 is installed at one end of the rotating component 2 for driving the rotating component 2 to adjust its height according to the height of the vehicle, an end of the rotating component 2 away from the lifting component 1 is provided with an identification component 3 that can slide for lateral movement according to the position of the vehicle license plate, a lighting component 4 is provided below the identification component 3 for providing illumination to avoid unclear identification of the identification component 3 and the rear end is slidably connected to the rotating component 2, the lifting component 1 comprises a mounting plate 101, a telescopic column 103, a telescopic sleeve 104, a display panel 105 and a cylinder 106, a display panel 105 is installed on one side of the telescopic sleeve 104, a cylinder 106 is installed on the upper end of the telescopic sleeve 104, a telescopic column 103 is sleeved inside the telescopic sleeve 104, a mounting plate 101 is installed at the lower end of the telescopic column 103, and mounting holes 102 for bolts to pass through are opened at the corners of the mounting plate 101.

[0024] See also Figure 3-4In this embodiment, the rotating assembly 2 includes a first rotating ring sleeve 201, a first rotating shaft 202, a first motor 203, a connecting column 204, a first rotating shaft 205, a second motor 206, a guide column 207, a second rotating shaft 208, a third motor 209 and a supporting column 210. One end of the connecting column 204 is penetrated by the first rotating shaft 202, one end of the first rotating shaft 202 is externally sleeved with a first rotating ring sleeve 201 fixedly connected to the telescopic sleeve 104, one end of the first rotating shaft 202 away from the first rotating ring sleeve 201 is installed with the first motor 203, and one end of the connecting column 204 away from the first rotating shaft 202 is A first rotating shaft 205 is installed at the end, a second motor 206 is installed on one side of the first rotating shaft 205, a guide column 207 is rotatably connected to the connecting column 204 through the first rotating shaft 205, a second rotating shaft 208 is installed at the end of the guide column 207 away from the first rotating shaft 205, a third motor 209 is installed on one side of the second rotating shaft 208, a support column 210 is rotatably connected to the guide column 207 through the second rotating shaft 208, a T-shaped slide groove 211 for sliding of the identification component 3 is provided on one side of the support column 210, and a rectangular slide groove 212 for sliding of the illumination component 4 is provided on the side of the support column 210 away from the T-shaped slide groove 211.

[0025] See also Figure 5-6 In this embodiment, the identification component 3 includes a T-shaped slider 301, a second rotating ring sleeve 302, a second rotating shaft 303, a camera body 304 and an infrared distance detector 305 (the model of the infrared distance detector 305 is BX-S2000). A T-shaped slider 301 is installed on one side of the second rotating ring sleeve 302. The T-shaped slider 301 drives the second rotating ring sleeve 302 to slide along the T-shaped slide groove 211 and connect with the support column 210. A second rotating shaft 303 is installed inside the second rotating ring sleeve 302. A camera body 304 is installed on the side of the second rotating shaft 303 away from the second rotating ring sleeve 302. The infrared distance detector 305 is installed on one end of the camera body 304 away from the second rotating shaft 303. A driver is installed inside the rectangular slider 301 and the second rotating shaft 303 (the driver model is AQMD6030BLS-E3). The lighting component 4 includes a rectangular slider 401, an L-shaped support frame 402, a connecting shaft 403 and a lighting lamp body 404. The rectangular slider 401 is installed at one end of the L-shaped support frame 402, and the driver is installed inside the rectangular slider 401. The rectangular slider 401 drives the L-shaped support frame 402 to slide and connect with the support column 210 along the rectangular slide groove 212. The connecting shaft 403 is installed at one end of the L-shaped support frame 402 away from the rectangular slider 401. The lighting lamp body 404 is rotatably connected to the L-shaped support frame 402 through the connecting shaft 403, and a driver is installed on one side of the connecting shaft 403.

[0026] When working, firstly, the mounting plate 101 is fixedly connected to the ground by bolts passing through the mounting holes 102. When the vehicle enters the identification area, the infrared distance detector 305 feeds back the detected vehicle height to the backstage, and then the telescopic sleeve 104 drives the camera body 304 to move to a suitable height along the telescopic column 103 through the drive of the cylinder 106;

[0027] When the height adjustment is completed, the distance between the vehicle and the camera body 304 is detected by the infrared distance detector 305 and fed back to the background. Then, the first rotating shaft 202 drives the connecting column 204 to rotate along the first rotating ring 201 through the drive of the first motor 203. Then, the guide column 207 rotates with the connecting column 204 through the first rotating shaft 205 through the drive of the second motor 206. Finally, the support column 210 rotates with the guide column 207 through the second rotating shaft 208 through the drive of the third motor 209, thereby bringing the camera body 304 close to the license plate to prevent the vehicle from entering the recognition area at various angles and postures, which affects the recognition accuracy.

[0028] When the camera body 304 approaches a vehicle license plate, the infrared distance detector 305 drives the T-shaped slider 301 to drive the second rotating ring 302 to slide along the T-shaped slide groove 211 and connect with the support column 210, so that the camera body 304 is aligned with the vehicle license plate. Then, the second rotating shaft 303 drives the camera body 304 to rotate along the second rotating ring 302 to be parallel to the ground, so that the camera body 304 can more effectively identify the vehicle license plate.

[0029] According to the position of the camera body 304, the rectangular slider 401 drives the L-shaped support frame 402 to slide and connect with the support column 210 along the rectangular slide groove 212 through the drive, until the lighting body 404 moves to the bottom of the camera body 304, and then according to the height of the vehicle license plate, the lighting body 404 is rotated to a suitable angle through the connecting shaft 403 and the L-shaped support frame 402, so that the camera body 304 can identify the vehicle license plate. When the camera body 304 has identified the vehicle license plate, all the information is displayed on the display panel 105, and then the connecting column 204, the guide column 207 and the support column 210 are rotated and retracted to avoid affecting the vehicle's exit.

[0030] Through the above steps, when the height adjustment is completed, the distance between the vehicle and the camera body 304 is detected by the infrared distance detector 305, and the feedback is sent to the backstage. Then, the first rotating shaft 202 drives the connecting column 204 to rotate along the first rotating ring 201 through the drive of the first motor 203, and then the guide column 207 is driven by the second motor 206 to rotate with the connecting column 204 through the first rotating shaft 205. Finally, the support column 210 is driven by the third motor 209 to rotate with the second rotating shaft 208 and the guide column 207, thereby bringing the camera body 304 close to the vehicle. When the camera body 304 approaches the vehicle license plate, the infrared distance detector 305 is used to drive the second rotating ring sleeve 302 along the T-shaped slide groove 211 and the support column 210 to slide and connect, so that the camera body 304 is aligned with the vehicle license plate. Then, the second rotating shaft 303 drives the camera body 304 to rotate along the second rotating ring sleeve 302 to be parallel to the ground through the drive of the driver, so that the camera body 304 can recognize the vehicle license plate more effectively.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A license plate recognition device with adjustable angle, comprising a lifting assembly (1); characterized in that: The invention also comprises a rotating assembly (2), an identification assembly (3) and an illumination assembly (4); a lifting assembly (1) for driving the rotating assembly (2) to adjust its height according to the height of the vehicle is installed at one end of the rotating assembly (2); an identification assembly (3) which can slide and move horizontally according to the position of the vehicle license plate is provided at one end of the rotating assembly (2) away from the lifting assembly (1); and an illumination assembly (4) for providing illumination to prevent unclear identification by the identification assembly (3) and having a rear end slidably connected to the rotating assembly (2) is provided below the identification assembly (3).

2. The angle-adjustable license plate recognition device according to claim 1, characterized in that: The lifting assembly (1) comprises a mounting plate (101), a telescopic column (103), a telescopic sleeve (104), a display panel (105) and a cylinder (106); the display panel (105) is mounted on one side of the telescopic sleeve (104); the cylinder (106) is mounted on the upper end of the telescopic sleeve (104); the telescopic column (103) is mounted inside the telescopic sleeve (104); the mounting plate (101) is mounted on the lower end of the telescopic column (103); and mounting holes (102) for bolts to pass through are respectively provided at the upper corners of the mounting plate (101).

3. The angle-adjustable license plate recognition device according to claim 1, characterized in that: The rotating assembly (2) comprises a first rotating ring sleeve (201), a first rotating shaft (202), a first motor (203), a connecting column (204), a first rotating shaft (205), a second motor (206), a guiding column (207), a second rotating shaft (208), a third motor (209) and a supporting column (210); one end of the connecting column (204) is penetrated by the first rotating shaft (202); one end of the first rotating shaft (202) is externally sleeved with a first rotating ring sleeve (201) fixedly connected to the telescopic sleeve (104); and one end of the first rotating shaft (202) away from the first rotating ring sleeve (201) is mounted with the first motor (203).

4. The angle-adjustable license plate recognition device according to claim 3, characterized in that: A first rotating shaft (205) is mounted on one end of the connecting column (204) away from the first rotating shaft (202), a second motor (206) is mounted on one side of the first rotating shaft (205), the guide column (207) is rotatably connected to the connecting column (204) via the first rotating shaft (205), and a second rotating shaft (208) is mounted on one end of the guide column (207) away from the first rotating shaft (205).

5. The angle-adjustable license plate recognition device according to claim 3, characterized in that: A third motor (209) is mounted on one side of the second rotating shaft (208); the support column (210) is rotatably connected to the guide column (207) via the second rotating shaft (208); a T-shaped slide groove (211) for sliding the identification component (3) is provided on one side of the support column (210); and a rectangular slide groove (212) for sliding the illumination component (4) is provided on a side of the support column (210) away from the T-shaped slide groove (211).

6. The angle-adjustable license plate recognition device according to claim 3, characterized in that: The identification component (3) comprises a T-shaped slider (301), a second rotating ring sleeve (302), a second rotating shaft (303), a camera body (304) and an infrared distance detector (305). The T-shaped slider (301) is installed on one side of the second rotating ring sleeve (302). The T-shaped slider (301) drives the second rotating ring sleeve (302) to slide along the T-shaped slide groove (211) and connect with the support column (210). The second rotating shaft (303) is installed inside the second rotating ring sleeve (302). The camera body (304) is installed on one side of the second rotating shaft (303) away from the second rotating ring sleeve (302). The infrared distance detector (305) is installed on one end of the camera body (304) away from the second rotating shaft (303). Drivers are installed inside the T-shaped slider (301) and the second rotating shaft (303).

7. The angle-adjustable license plate recognition device according to claim 3, characterized in that: The lighting assembly (4) comprises a rectangular slider (401), an L-shaped support frame (402), a connecting shaft (403) and a lighting lamp body (404); the rectangular slider (401) is installed at one end of the L-shaped support frame (402); a driver is installed inside the rectangular slider (401); the rectangular slider (401) drives the L-shaped support frame (402) to slide along the rectangular slide groove (212) and connect with the support column (210); a connecting shaft (403) is installed at one end of the L-shaped support frame (402) away from the rectangular slider (401); the lighting lamp body (404) is rotatably connected to the L-shaped support frame (402) via the connecting shaft (403); and a driver is installed on one side of the connecting shaft (403).

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