License plate recognition and acquisition device

Abstract

The invention discloses a license plate recognition and acquisition device, and relates to the technical field of license plate recognition and acquisition, the license plate recognition and acquisition device comprises a case, a gate wall, a probe and a ground sensing system, a lifting assembly matched with the gate wall is installed in the case, and the lifting assembly realizes lifting control of the gate wall according to induction of the ground sensing system to a vehicle; and a top plate is slidably mounted at the top of the case. The device has the advantages that the probe can be stored when no vehicle approaches, physical damage caused by long-time exposure of the probe can be avoided, information recorded by the probe can be protected in a hidden mode, in addition, when the vehicle approaches, the angle of the probe can be automatically changed according to the lifting condition of the gate wall, and the safety of the vehicle is improved. Therefore, the license plate information before and after the vehicle can be recorded at the same time, the departure direction of the vehicle can be recorded, the accuracy of license plate recognition can be ensured, and the requirements of fine management and safe tracing can be met.

Description

Technical Field

[0001] This invention relates to the field of license plate recognition and acquisition technology, and in particular to a license plate recognition and acquisition device. Background Technology

[0002] License plate recognition and data acquisition devices are an important component of modern intelligent traffic management systems. They are often used in conjunction with barrier gate systems to achieve automated management of vehicles entering and exiting. As a control device for vehicle passage, the barrier gate, by integrating a license plate recognition and data acquisition device, can automatically identify vehicle license plate information and perform operations such as allowing, recording, or blocking vehicles accordingly. It is widely used in access management in parking lots, residential areas, parks, and other places, significantly improving traffic efficiency, reducing labor costs, and enhancing security and the level of intelligent management.

[0003] However, existing license plate recognition and acquisition devices typically expose their recognition probes (such as cameras) directly to the outdoor environment, subjecting them to long-term exposure to sunlight, rain, dust, and extreme temperatures, resulting in rapid physical wear and tear and impacting their stability and lifespan. Secondly, traditional devices primarily focus on instantaneous recognition at entrances and exits and gate control, lacking the ability to continuously track vehicles after they enter. They generally only record the time of vehicle entry and exit, failing to track the vehicle's route and destination within the area, thus failing to meet the needs of refined management and security traceability. Therefore, it is necessary to design a new license plate recognition and acquisition device. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a license plate recognition and acquisition device that solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A license plate recognition and acquisition device includes a chassis, a gate wall, a probe, and a ground sensing system. The chassis houses a lifting assembly that works with the gate wall. The lifting assembly controls the lifting of the gate wall based on the ground sensing system's detection of vehicles. A top plate is slidably mounted on the top of the chassis, and a bottom plate is fixedly mounted on the bottom of the top plate via a side plate. A fixing plate is rotatably mounted on the bottom plate via a rotating rod. The probe is fixedly mounted on the fixing plate. An electric telescopic rod is fixedly mounted inside the chassis, and the output end of the electric telescopic rod is fixedly connected to the bottom plate. The electric telescopic rod adjusts the position of the top plate based on the ground sensing system's detection of vehicles. The base plate is equipped with a deflection assembly that cooperates with the rotating rod and the lifting assembly. The deflection assembly is used to adjust the angle of the probe according to the lifting of the gate wall. The bottom of the top plate is fixedly equipped with a dust cover that cooperates with the probe. A rotating ring is rotatably mounted on the fixed plate, and a sealing ring that is rotatably connected to the dust cover is fixedly mounted on the rotating ring. A dust removal rod that cooperates with the dust cover is mounted on the sealing ring. The base plate is equipped with a synchronization assembly that cooperates with the rotating rod and the rotating ring. The synchronization assembly is used to drive the dust removal rod to clean the dust cover when the angle of the probe changes.

[0006] Furthermore, the lifting assembly consists of a motor, a differential mechanism, and a drive shaft. The motor is fixedly installed inside the chassis, the drive shaft is rotatably connected to the chassis, and one end of the drive shaft is fixedly connected to the gate wall. The differential mechanism is installed between the output end of the motor and the drive shaft.

[0007] Furthermore, the differential mechanism consists of a rotating shaft, a pinion, a large gear, and a chain drive structure. The rotating shaft is rotatably mounted inside the housing and is horizontally positioned with the drive shaft. The pinion is fixedly mounted on the output end of the motor, and the large gear is fixedly mounted on the rotating shaft, with the large gear meshing with the pinion. The chain drive structure is installed between the rotating shaft and the drive shaft.

[0008] Furthermore, the deflection assembly consists of a connecting rod, a driving gear ring, a fixed gear ring, a driven bevel gear, and a driving bevel gear. The connecting rod is rotatably mounted on the base plate, the driving gear ring is fixedly mounted on the connecting rod, the fixed gear ring is fixedly mounted on the rotating rod and meshes with the driving gear ring, the driven bevel gear is fixedly mounted on the bottom of the connecting rod, and the driving bevel gear is fixedly mounted on the drive shaft and meshes with the driven bevel gear.

[0009] Furthermore, the tooth pitch of the driving gear ring is equal to the tooth pitch of the fixed gear ring, and the number of teeth and the circumference of the driving gear ring are both twice that of the fixed gear ring.

[0010] Furthermore, the synchronization assembly consists of a drive shaft, a mating gear ring, a fixed sleeve, a connecting gear ring, and multiple support rods. The drive shaft is rotatably mounted on the base plate, the mating gear ring is fixedly mounted on the drive shaft, the fixed sleeve is fixedly mounted inside the rotating ring via multiple support rods, and the fixed sleeve is rotatably connected to the rotating rod. The connecting gear ring is fixedly mounted on the fixed sleeve, and the connecting gear ring meshes with the mating gear ring, and the mating gear ring meshes with the fixed gear ring.

[0011] Furthermore, the tooth pitch, number of teeth, and circumference of the mating tooth ring are equal to those of the fixed tooth ring, the tooth pitch of the mating tooth ring is equal to that of the connecting tooth ring, and the number of teeth and circumference of the mating tooth ring are twice that of the connecting tooth ring.

[0012] Furthermore, the tooth pitch, number of teeth, and circumference of the mating tooth ring are equal to those of the fixed tooth ring, the tooth pitch of the mating tooth ring is equal to that of the connecting tooth ring, and the number of teeth and circumference of the mating tooth ring are twice that of the connecting tooth ring.

[0013] Compared with existing technologies, the advantages of this invention are: 1. By using the top plate, bottom plate and fixing plate together, the probe can be stored when no vehicle is near. This can not only avoid physical damage caused by prolonged exposure of the probe, but also effectively protect the information recorded by the probe by hiding it, preventing human damage or theft.

[0014] 2: By combining the fixing plate and the deflection component, the probe angle can be changed during the gate wall lifting process. After the gate wall is lifted, the probe turns to face away from the vehicle entrance. At this time, the probe can record the license plate of the vehicle at the rear and the direction of the vehicle's departure, ensuring the accuracy of license plate recognition and meeting the needs of refined management and safety traceability.

[0015] 3: Through the cooperation of the dust cover, dust removal rod and synchronization component, the cleanliness of the probe can be effectively ensured, and the dust removal rod can automatically clean the dust cover as the probe angle changes, ensuring the hygiene of the dust cover for long-term use and ensuring the clarity of the image recorded by the probe.

[0016] In summary, this invention can retract the probe when no vehicle is approaching, which avoids physical damage caused by prolonged exposure of the probe and protects the information recorded by the probe through concealment. In addition, when a vehicle approaches, the probe can automatically change its angle according to the lifting of the gate, so that the license plate information of the front and rear of the vehicle can be recorded simultaneously, and the departure direction of the vehicle can also be recorded. This ensures the accuracy of license plate recognition and meets the needs of refined management and security traceability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a license plate recognition and acquisition device proposed in this invention; Figure 2 for Figure 1 A schematic diagram of the structure after the top plate has been moved up a certain distance; Figure 3 for Figure 2 A schematic diagram of the structure after removing the chassis; Figure 4 for Figure 3 A structural diagram from another perspective; Figure 5 for Figure 2 An enlarged view of the structure at the top center slab from another perspective; Figure 6 for Figure 5The front view; Figure 7 for Figure 6 Schematic diagram of the structure of the C-plane; Figure 8 for Figure 7 Enlarged structural diagram of section A; Figure 9 for Figure 7 Enlarged structural diagram of section B; Figure 10 for Figure 5 Enlarged schematic diagram of the bottom structure of the middle sealing ring; Figure 11 for Figure 11 A schematic diagram of the structure from another perspective after removing the sealing ring.

[0018] In the diagram: 1. Chassis, 2. Gate wall, 3. Motor, 4. Rotating shaft, 5. Small gear, 6. Large gear, 7. Drive shaft, 8. Chain drive structure, 9. Top plate, 10. Side plate, 11. Bottom plate, 12. Probe, 13. Electric telescopic rod, 14. Dust cover, 15. Rotating rod, 16. Fixing plate, 17. Connecting rod, 18. Drive gear ring, 19. Fixing gear ring, 20. Driven bevel gear, 21. Driven bevel gear, 22. Rotating ring, 23. Sealing ring, 24. Fixing rod, 25. Dust removal rod, 26. Drive shaft, 27. Connecting gear ring, 28. Support rod, 29. Fixing sleeve, 30. Connecting gear ring, 31. Fixing gear, 32. Internal gear ring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Reference Figures 1-11A license plate recognition and acquisition device includes a housing 1, a gate wall 2, a probe 12, and a ground sensing system. The ground sensing system is an inductive loop detection system used in existing barrier gates. It is buried under the surface of the lane and works by sensing the disturbance of electromagnetic field by the metal body of the vehicle. The specific structure and working principle are not described here. When a vehicle passes by, the ground sensing system senses the vehicle and sends an electrical signal to the controller. The controller is installed in the housing 1 and is used to control the operation of the electrical components in the entire housing 1. The controller adopts an existing PLC controller, and its working principle and specific structure are not described here.

[0022] The housing 1 houses a lifting assembly that works in conjunction with the gate wall 2. The lifting assembly controls the lifting of the gate wall 2 based on the vehicle sensing system. The lifting assembly consists of a motor 3, a differential mechanism, and a drive shaft 7. The motor 3 is fixedly installed inside the housing 1, and the drive shaft 7 is rotatably connected to the housing 1, with one end of the drive shaft 7 fixedly connected to the gate wall 2. The differential mechanism is installed between the output end of the motor 3 and the drive shaft 7. When the local sensor system senses a vehicle, it sends an electrical signal to the controller, which then causes the motor 3 to operate. The differential mechanism then drives the drive shaft 7 to move, controlling the lifting and lowering of the gate wall 2. The motor 3 can specifically be an ACM6004M2H servo motor.

[0023] The differential mechanism consists of a rotating shaft 4, a small gear 5, a large gear 6, and a chain drive structure 8. The rotating shaft 4 is rotatably mounted inside the housing 1, and the rotating shaft 4 and the drive shaft 7 are horizontally arranged. The small gear 5 is fixedly mounted on the output end of the motor 3, and the large gear 6 is fixedly mounted on the rotating shaft 4, and the large gear 6 meshes with the small gear 5. The chain drive structure 8 is installed between the rotating shaft 4 and the drive shaft 7. When the motor 3 is working, the meshing effect of the small gear 5 and the large gear 6 causes the rotating shaft 4 to rotate slowly. Then, through the design of the chain drive structure 8, the drive shaft 7 runs simultaneously, controlling the rotation of the gate wall 2. The design of the differential mechanism makes the raising and lowering of the gate wall 2 smoother. The chain drive structure 8 consists of a chain and two sprockets. The two sprockets are fixedly mounted on the rotating shaft 4 and the drive shaft 7 respectively, and the chain is installed between the two sprockets. The two sprockets have the same diameter.

[0024] A top plate 9 is slidably mounted on the top of the chassis 1, and a bottom plate 11 is fixedly mounted on the bottom of the top plate 9 via a side plate 10. A fixing plate 16 is rotatably mounted on the bottom plate 11 via a rotating rod 15. A probe 12 is fixedly mounted on the fixing plate 16. An electric telescopic rod 13 is fixedly mounted inside the chassis 1, and the output end of the electric telescopic rod 13 is fixedly connected to the bottom plate 11. The electric telescopic rod 13 adjusts the position of the top plate 9 based on the vehicle sensing system. Specifically, the electric telescopic rod 13 can be a YMD-608 model electric telescopic rod. When a vehicle approaches, the controller activates the electric telescopic rod. When the telescopic rod 13 moves, it moves the top plate 9 upward. After the top plate 9 moves into place, the probe 12 moves out of the housing 1. At this time, the probe 12 can collect the vehicle's license plate information. After the probe 12 moves out, the controller sends a signal to make the motor 3 run and the gate 2 start to move. When the vehicle moves away from the device, the ground sensor system detects that the vehicle has left. At this time, the controller first resets the gate 2, and then controls the electric telescopic rod 13 to move the top plate 9 down to reset, storing the probe 12 in the housing 1. This avoids the problem of the probe 12 being exposed to the outside for a long time, which would reduce its service life.

[0025] A deflection assembly is installed on the base plate 11, which cooperates with the rotating rod 15 and the lifting assembly. The deflection assembly is used to adjust the viewing angle of the probe 12 according to the lifting of the gate wall 2. The deflection assembly consists of a connecting rod 17, a drive gear ring 18, a fixed gear ring 19, a driven bevel gear 20, and a driving bevel gear 21. The connecting rod 17 is rotatably mounted on the base plate 11, the drive gear ring 18 is fixedly mounted on the connecting rod 17, the fixed gear ring 19 is fixedly mounted on the rotating rod 15, and the fixed gear ring 19 meshes with the drive gear ring 18. The driven bevel gear 20 is fixedly mounted on the bottom of the connecting rod 17, and the driving bevel gear 21 is fixedly mounted on the bottom of the connecting rod 17. Mounted on the drive shaft 7, with the driving bevel gear 21 meshing with the driven bevel gear 20, when the top plate 9 moves upward and the probe 12 moves out, the movement of the top plate 9 simultaneously causes the bottom plate 11 to move upward, so that the driven bevel gear 20 and the driving bevel gear 21 are in a meshing state. Subsequently, when the gate wall 2 is raised, the rotation of the drive shaft 7 will cause the connecting rod 17 to rotate simultaneously through the meshing effect of the driving bevel gear 21 and the driven bevel gear 20. At this time, under the meshing effect of the drive gear ring 18 and the fixed gear ring 19, the rotating rod 15 drives the fixed plate 16 to rotate on the bottom plate 11, so that the viewing angle of the probe 12 changes simultaneously.

[0026] The tooth pitch of the drive gear ring 18 is equal to the tooth pitch of the fixed gear ring 19, and the number of teeth and circumference of the drive gear ring 18 are twice that of the fixed gear ring 19. Since the lifting angle of the gate wall 2 is 90°, the number of teeth and circumference of the drive gear ring 18 and the fixed gear ring 19 are specially designed to change the transmission ratio between the connecting rod 17 and the rotating rod 15. When the gate wall 2 rotates 90°, the fixed plate 16 can drive the probe 12 to rotate 180°, so that the viewing angle of the probe 12 changes from facing the vehicle entrance before the gate wall 2 is lifted to facing away from the vehicle entrance after the gate wall 2 is lifted. At this time, the probe 12 can record secondary information of the vehicles passing through the gate wall 2, which is convenient for recording the driving direction of the vehicles after passing through the device. It is also convenient for uniformly recording the license plates of the front and rear of the vehicles to ensure the accuracy of license plate recognition and meet the needs of refined management and safety traceability.

[0027] A dust cover 14 that works with the probe 12 is fixedly installed at the bottom of the top plate 9. The dust cover 14 is designed to isolate the probe 12 from the external environment after the probe 12 is removed from the housing 1, ensuring the cleanliness of the probe 12 and the clarity of its recorded image. At the same time, the dust cover 14 is made of transparent material to avoid obstructing the probe 12.

[0028] A rotating ring 22 is rotatably mounted on the fixed plate 16, and a sealing ring 23 is fixedly mounted on the rotating ring 22 to be rotatably connected to the dust cover 14. A dust removal rod 25 that cooperates with the dust cover 14 is mounted on the sealing ring 23. When the rotating ring 22 rotates, the dust removal rod 25 can be rotated through the sealing ring 23 to clean the dust cover 14 and ensure the cleanliness of the dust cover 14.

[0029] A synchronization assembly is installed on the base plate 11 to cooperate with the rotating rod 15 and the rotating ring 22. The synchronization assembly is used to drive the dust removal rod 25 to clean the dust cover 14 when the viewing angle of the probe 12 changes. The synchronization assembly consists of a drive shaft 26, a docking gear ring 27, a fixing sleeve 29, a connecting gear ring 30, and multiple support rods 28. The drive shaft 26 is rotatably mounted on the base plate 11, the docking gear ring 27 is fixedly mounted on the drive shaft 26, and the fixing sleeve 29 is fixedly mounted inside the rotating ring 22 through multiple support rods 28. The fixing sleeve 29 is rotatably connected to the rotating rod 15, and the connecting gear ring... 30 is fixedly installed on the fixed sleeve 29, and the connecting gear ring 30 meshes with the docking gear ring 27. The docking gear ring 27 meshes with the fixed gear ring 19. When the rotating rod 15 rotates, the engagement of the fixed gear ring 19 and the docking gear ring 27 drives the transmission shaft 26 to rotate simultaneously. Subsequently, the docking gear ring 27 on the transmission shaft 26 drives the fixed sleeve 29 to rotate through the connecting gear ring 30, causing the rotating ring 22 to rotate simultaneously. This enables the dust removal rod 25 to automatically complete the surface cleaning action of the dust cover 14 during the process of the probe 12 changing its viewing angle.

[0030] The tooth pitch, number of teeth, and circumference of the mating tooth ring 27 are equal to those of the fixed tooth ring 19. The tooth pitch of the mating tooth ring 27 is equal to that of the connecting tooth ring 30. The number of teeth and circumference of the mating tooth ring 27 are twice that of the connecting tooth ring 30. The advantage of this size design is that when the rotating rod 15 rotates 180°, the rotating ring 22 can rotate 360°, so that the dust removal rod 25 can complete the overall cleaning of the surface of the dust cover 14, avoiding the existence of cleaning dead corners. There is a 90° angle between the initial position of the dust removal rod 25 and the initial position of the probe 12, and the dust removal rod 25 is located at the end closer to the gate wall 2. This angle design can prevent the dust removal rod 25 from obstructing the viewing angle of the probe 12.

[0031] A fixing rod 24 is rotatably mounted on the sealing ring 23, and the fixing rod 24 is fixedly connected to the dust removal rod 25. A fixing gear 31 is fixedly mounted on the top of the fixing rod 24, and an internal gear ring 32 is fixedly mounted on the bottom of the top plate 9. The internal gear ring 32 meshes with the fixing gear 31. Through the meshing effect of the fixing gear 31 and the internal gear ring 32, when the dust removal rod 25 completes the cleaning of the dust cover 14 with the rotating ring 22, the dust removal rod 25 can also rotate during the cleaning process, thereby changing the contact area between the dust removal rod 25 and the dust cover 14, and further ensuring the cleaning effect of the dust removal rod 25 on the dust cover 14.

[0032] The working principle of a license plate recognition and acquisition device in this invention is as follows: Vehicle front license plate recording: When a vehicle approaches the device, the ground sensor system senses the vehicle information and sends a signal to the controller. The controller causes the electric telescopic rod 13 to move the top plate 9 upward, allowing the probe 12 to move out of the housing 1. At this time, the probe 12 records the vehicle front license plate. Subsequently, the controller causes the motor 3 to rotate forward, causing the gate wall 2 to rise. The angle of probe 12 changes automatically: During the lifting process of gate wall 2, through the operation of the deflection component, the fixed plate 16 drives probe 12 to rotate 180° in the horizontal direction, so that it turns from the end facing the vehicle entrance to the end away from the vehicle entrance. Recording of vehicle license plate and departure direction: After the gate 2 is fully raised, the vehicle passes through the device. At this time, the probe 12 records the vehicle's license plate and departure direction, which can ensure the accuracy of license plate recognition and meet the needs of refined management and safety traceability. Reset action: After the ground sensor system senses that the vehicle has left, the controller causes the motor 3 to reverse. At this time, the brake wall 2 falls down, and the probe 12 resets its angle. Then the controller causes the electric telescopic rod 13 to retract, and the probe 12 is hidden inside the housing 1. This avoids physical damage caused by the probe 12 being exposed to the outside for a long time. It can also effectively protect the information recorded by the probe 12 by hiding it, preventing human damage or theft. Self-cleaning of dust cover 14: During the angle change and reset of probe 12, the operation of the synchronization component will cause the rotating ring 22 located outside it to rotate simultaneously during the rotation of fixed plate 16, so that dust removal rod 25 can effectively clean the entire surface of dust cover 14, preventing dust from adhering to it and causing obstruction of probe 12.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A license plate recognition and acquisition device, comprising a chassis (1), a gate (2), a probe (12), and a ground sensing system, characterized in that, The housing (1) is equipped with a lifting assembly that works in conjunction with the gate wall (2). The lifting assembly controls the lifting of the gate wall (2) based on the ground sensing system's sensing of the vehicle. A top plate (9) is slidably installed on the top of the housing (1), and a bottom plate (11) is fixedly installed on the bottom of the top plate (9) via a side plate (10). A fixed plate (16) is rotatably installed on the bottom plate (11) via a rotating rod (15). The probe (12) is fixedly installed on the fixed plate (16). An electric telescopic rod (13) is fixedly installed inside the housing (1), and the output end of the electric telescopic rod (13) is fixedly connected to the bottom plate (11). The electric telescopic rod (13) adjusts the position of the top plate (9) based on the ground sensing system's sensing of the vehicle. The base plate (11) is equipped with a deflection assembly that cooperates with the rotating rod (15) and the lifting assembly. The deflection assembly is used to adjust the viewing angle of the probe (12) according to the lifting of the gate wall (2). The bottom of the top plate (9) is fixedly equipped with a dust cover (14) that cooperates with the probe (12). The fixed plate (16) is rotatably equipped with a rotating ring (22), and a sealing ring (23) that is rotatably connected to the dust cover (14) is fixedly equipped on the rotating ring (22). A dust removal rod (25) that cooperates with the dust cover (14) is installed on the sealing ring (23). The base plate (11) is equipped with a synchronization assembly that cooperates with the rotating rod (15) and the rotating ring (22). The synchronization assembly is used to drive the dust removal rod (25) to clean the dust cover (14) when the viewing angle of the probe (12) changes.

2. The license plate recognition and acquisition device according to claim 1, characterized in that, The lifting assembly consists of a motor (3), a differential mechanism and a drive shaft (7). The motor (3) is fixedly installed inside the housing (1). The drive shaft (7) is rotatably connected to the housing (1), and one end of the drive shaft (7) is fixedly connected to the gate wall (2). The differential mechanism is installed between the output end of the motor (3) and the drive shaft (7).

3. The license plate recognition and acquisition device according to claim 2, characterized in that, The differential mechanism consists of a rotating shaft (4), a small gear (5), a large gear (6), and a chain drive structure (8). The rotating shaft (4) is rotatably installed inside the housing (1), and the rotating shaft (4) and the drive shaft (7) are horizontally arranged. The small gear (5) is fixedly installed on the output end of the motor (3). The large gear (6) is fixedly installed on the rotating shaft (4), and the large gear (6) meshes with the small gear (5). The chain drive structure (8) is installed between the rotating shaft (4) and the drive shaft (7).

4. The license plate recognition and acquisition device according to claim 2, characterized in that, The deflection assembly consists of a connecting rod (17), a drive gear ring (18), a fixed gear ring (19), a driven bevel gear (20), and a driving bevel gear (21). The connecting rod (17) is rotatably mounted on the base plate (11). The drive gear ring (18) is fixedly mounted on the connecting rod (17). The fixed gear ring (19) is fixedly mounted on the rotating rod (15), and the fixed gear ring (19) meshes with the drive gear ring (18). The driven bevel gear (20) is fixedly mounted on the bottom of the connecting rod (17). The driving bevel gear (21) is fixedly mounted on the drive shaft (7), and the driving bevel gear (21) meshes with the driven bevel gear (20).

5. A license plate recognition and acquisition device according to claim 4, characterized in that, The tooth pitch of the driving gear ring (18) is equal to the tooth pitch of the fixed gear ring (19), and the number of teeth and the circumference of the driving gear ring (18) are twice that of the fixed gear ring (19).

6. The license plate recognition and acquisition device according to claim 4, characterized in that, The synchronization assembly consists of a drive shaft (26), a docking gear ring (27), a fixed sleeve (29), a connecting gear ring (30), and multiple support rods (28). The drive shaft (26) is rotatably mounted on the base plate (11). The docking gear ring (27) is fixedly mounted on the drive shaft (26). The fixed sleeve (29) is fixedly mounted inside the rotating ring (22) through multiple support rods (28), and the fixed sleeve (29) is rotatably connected to the rotating rod (15). The connecting gear ring (30) is fixedly mounted on the fixed sleeve (29), and the connecting gear ring (30) meshes with the docking gear ring (27). The docking gear ring (27) meshes with the fixed gear ring (19).

7. A license plate recognition and acquisition device according to claim 6, characterized in that, The tooth pitch, number of teeth and circumference of the mating tooth ring (27) are equal to those of the fixed tooth ring (19), the tooth pitch of the mating tooth ring (27) is equal to that of the connecting tooth ring (30), and the number of teeth and circumference of the mating tooth ring (27) are twice that of the connecting tooth ring (30).

8. The license plate recognition and acquisition device according to claim 1, characterized in that, A fixing rod (24) is rotatably mounted on the sealing ring (23), and the fixing rod (24) is fixedly connected to the dust removal rod (25). A fixing gear (31) is fixedly mounted on the top of the fixing rod (24), and an internal gear ring (32) is fixedly mounted on the bottom of the top plate (9), and the internal gear ring (32) meshes with the fixing gear (31).

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