Barrier gate license plate recognition device installed based on lifting rod type camera

Abstract

The utility model discloses a barrier gate license plate recognition device installed based on a lifting rod type camera, which comprises a barrier gate control device, main cameras, auxiliary cameras, a barrier gate lifting rod, a vehicle detection sensor and an audible and visual alarm, the main cameras are installed at two sides of a barrier gate entrance, the barrier gate lifting rod is located at a transverse position of a barrier gate and is horizontal to the ground, and the auxiliary cameras are installed on the barrier gate lifting rod. The main camera is installed on a barrier gate lifting rod, the auxiliary camera is installed on a barrier gate lifting rod, the audible and visual alarm is installed above the barrier gate control equipment, the main camera, the auxiliary camera and the audible and visual alarm are connected with the barrier gate control equipment, and the vehicle detection sensor is installed in front of a barrier gate entrance and detects arrival of vehicles. The device can accurately recognize license plates of vehicles entering and exiting, and the problem that an existing access control system is low in recognition rate due to environmental factors such as angles and backlighting is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to barrier gate and license plate recognition technical field, concretely relates to a barrier gate license plate recognition device based on the installation of lift bar type camera. BACKGROUND

[0002] In recent years, with the growth of the number of motor vehicles, barrier gate systems are widely used in parking lots, communities, government agencies and other types of access control places, and are used for controlling vehicle access. The traditional barrier gate camera is fixedly installed on the upper side of the stand column beside the barrier gate or the fixed position near the horizontal rod. However, this fixed installation method has many limitations, which seriously affects the accuracy and efficiency of license plate recognition.

[0003] On the one hand, the shooting angle of the fixed camera is relatively single. When facing vehicles with different body heights, parking positions, and different driving postures (such as oblique entry, vehicle head not completely aligned with the camera, etc.), the license plate image collection is incomplete, and the characters are distorted due to the perspective distortion, which is difficult to identify. On the other hand, due to the limitation of fixed height and position, in strong light direct radiation (such as low-angle sun radiation in summer afternoon), backlight (vehicle entering or leaving against or with light at early or late hours), rain and fog weather, and other bad environments, the license plate reflection, shadow, and blur phenomenon occur frequently, resulting in recognition failure or error, reducing the convenience and safety of vehicle access control, and increasing the cost of manual intervention. In view of this, the present scheme proposes a system in which the camera is installed on the barrier gate lift rod as an auxiliary, which is used to improve the license plate recognition capability when the main camera does not recognize the license plate. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a barrier gate license plate recognition device with high recognition efficiency, which can accurately recognize the license plate of the incoming and outgoing vehicles, and effectively overcome the problem of low recognition rate caused by environmental factors such as angle and backlight in the existing access control system.

[0005] The technical scheme for achieving the utility model is as follows:

[0006] A barrier gate license plate recognition device based on the installation of lift bar type camera, comprising a barrier gate control device, a main camera, an auxiliary camera, a barrier gate lift rod, a vehicle detection sensor, and an audible and visual alarm, the main camera is installed on both sides of the barrier gate entrance, the barrier gate lift rod is located at the horizontal position of the barrier gate and is horizontal to the ground, the auxiliary camera is installed on the barrier gate lift rod, the audible and visual alarm is installed above the barrier gate control device, the main camera, the auxiliary camera, the audible and visual alarm, and the barrier gate control device are connected, and the vehicle detection sensor is installed at the front position of the barrier gate entrance to detect the arrival of the vehicle.

[0007] Preferably, the barrier gate lift rod is made of aluminum alloy material, and a hollow cavity is designed inside for wiring arrangement.

[0008] Preferably, the auxiliary camera is installed in the middle of the barrier lifting rod, and the surface of the auxiliary camera lens is flush with the surface of the lifting rod.

[0009] Preferably, a strip-shaped light supplementing device is installed on the barrier lifting rod, located on both sides of the auxiliary camera, and the auxiliary camera is connected with the strip-shaped light supplementing device through a 485 interface.

[0010] Preferably, the main camera and the auxiliary camera are connected with the barrier control device through a network cable, and the audible and visual alarm is connected with the barrier control device through a 485 interface.

[0011] Preferably, the vehicle detection sensor comprises a geomagnetic sensor and an infrared sensor.

[0012] Compared with the prior art, the utility model has the following remarkable effects:

[0013] (1) Improve the license plate recognition rate: by increasing the lifting rod type auxiliary camera, the secondary recognition opportunity is provided in the case of main camera recognition failure, which greatly improves the success rate of the whole license plate recognition and reduces the vehicle retention time in front of the barrier.

[0014] (2) Strong adaptability: the auxiliary camera can better adapt to different vehicle models, vehicle postures, and complex light and weather conditions.

[0015] (3) High system integration: the system can be well integrated with the existing barrier control system and license plate recognition device, without the need for large-scale modification of the original facilities, thereby reducing the implementation cost and difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic view of the utility model.

[0017] Figure 2 It is the installation schematic view of the auxiliary camera and the strip-shaped light supplementing device of the utility model.

[0018] In the figure: 1, barrier control device, 2, main camera, 3, auxiliary camera, 4, barrier lifting rod, 5, vehicle detection sensor, 6, audible and visual alarm; 7, strip-shaped light supplementing device. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be described in detail below with reference to the drawings, but the protection scope of the utility model is not limited to the embodiments.

[0020] A barrier license plate recognition device based on lifting rod type camera installation, comprising a barrier control device 1, a main camera 2, an auxiliary camera 3, a barrier lifting rod 4, a vehicle detection sensor 5 and an audible and visual alarm 6.

[0021] The barrier control device 1 is responsible for controlling the lifting of the barrier, and interacts with the main camera and the auxiliary camera. The device has sufficient computing power to process the image data collected by the camera and make corresponding control decisions.

[0022] The main camera 2 is installed on both sides of the barrier entrance and is responsible for regular license plate recognition. The main camera has a certain resolution and image processing capability, and can accurately recognize the license plate under normal circumstances.

[0023] The auxiliary camera 3 is installed on the barrier lifting rod. The barrier lifting rod is made of lightweight high-strength aluminum alloy material and has a hollow cavity inside for wiring and placement, which reduces the overall weight and protects the circuit from external damage. A miniature camera is installed in the middle of the lifting rod front end, close to the side of the vehicle entering. The camera lens surface is flush with the lifting rod surface. The auxiliary camera is equipped with a strip-shaped light supplement device 7 on both sides, which is connected to the strip-shaped light supplement device through a 485 interface. When it is dark or the light is insufficient, the light supplement device can assist in license plate recognition. The auxiliary camera module has a flip access hole at the back for easy module installation and maintenance.

[0024] The barrier lifting rod 4 is located horizontally on the barrier and can control the vehicle to enter or exit by lifting.

[0025] The vehicle detection sensor 5 includes a geomagnetic sensor and an infrared sensor, which is used to detect the arrival of the vehicle and trigger the start of the license plate recognition program. The sensor is installed in a proper position in front of the barrier entrance to ensure accurate detection of the vehicle.

[0026] The audible and visual alarm 6 is installed above the barrier control device. When the main camera and the auxiliary camera cannot recognize the license plate, the barrier control device triggers the audible and visual alarm to remind the security personnel to perform manual operation.

[0027] The use steps of the device are as follows:

[0028] (1) The vehicle enters the barrier entrance detection area, and the vehicle detection sensor detects the arrival of the vehicle and sends a signal to the barrier control system.

[0029] (2) The main camera starts to collect vehicle images and attempts to recognize the license plate.

[0030] (3) If the main camera successfully recognizes the license plate, the system compares the recognition result with the vehicle information in the database. After successful comparison, the barrier control system controls the barrier lifting rod to rise, and the vehicle passes smoothly.

[0031] (4) If the main camera does not recognize the license plate, the system immediately starts the auxiliary camera to collect the license plate image.

[0032] (5) The image data collected by the auxiliary camera is transmitted to the control system for processing. If the auxiliary camera successfully identifies the license plate, the system verifies it. If the verification is passed, the barrier gate remains open to let the vehicle pass. If the verification is failed, the barrier control device triggers the audible and light alarm to remind the security personnel to operate manually.

[0033] (6) If the auxiliary camera also fails to identify the license plate, the system directly prompts manual operation, and the barrier gate remains closed to prevent unauthorized vehicles from passing.

[0034] The camera is installed on the barrier lifting rod as an auxiliary license plate recognition device, providing an effective solution to the problems encountered by the main camera during license plate recognition. Through reasonable hardware design and advanced software algorithms, the system can significantly improve the accuracy and reliability of license plate recognition, adapt to more complex and diverse use scenarios, and has broad application prospects and practical value. The barrier control device of the device triggers the auxiliary camera for license plate recognition when the main camera fails to identify the license plate. When the auxiliary camera also fails to identify, the audible and light alarm is triggered to remind the security personnel to operate manually. The device can be widely used in various parking lots, residential areas, commercial centers, government agencies and other places that require vehicle access control management, effectively improving vehicle passage efficiency, improving user experience, and enhancing the safety and management level of the place.

[0035] As described above, although the present application has been shown and described with reference to specific preferred embodiments, it is not to be construed as a limitation on the present application itself. Various changes can be made in form and details without departing from the spirit and scope of the present application as defined in the appended claims.

Claims

1. A barrier license plate recognition device based on a lift bar camera installation, characterized by: Including barrier control device, main camera, auxiliary camera, barrier lifting rod, vehicle detection sensor and audible and visual alarm, the main camera is installed on both sides of the barrier entrance, the barrier lifting rod is located in the horizontal position of the barrier, and the ground is horizontal, the auxiliary camera is installed on the barrier lifting rod, the audible and visual alarm is installed above the barrier control device, the main camera, auxiliary camera, audible and visual alarm and barrier control device are connected, the vehicle detection sensor is installed in front of the barrier entrance, and the arrival of vehicles is detected.

2. The barrier license plate recognition device based on the lifting rod type camera installation according to claim 1, characterized in that: The barrier lifting rod is made of aluminum alloy material, and a hollow cavity is designed in the inside for wiring arrangement.

3. The barrier license plate recognition device based on the lifting rod type camera mount of claim 1, characterized in that: The auxiliary camera is installed at the middle position of the barrier lifting rod, and the lens surface of the auxiliary camera is flush with the surface of the lifting rod.

4. The barrier license plate recognition device based on the lifting rod type camera mount of claim 3, characterized in that: The barrier lifting rod is provided with a strip-shaped light supplementing device on the both sides of the auxiliary camera, and the auxiliary camera is connected with the strip-shaped light supplementing device through a 485 interface.

5. The barrier license plate recognition device based on the lifting rod type camera mount of claim 1, wherein: The main camera, auxiliary camera are connected with the barrier control device through a network cable, and the audible and visual alarm is connected with the barrier control device through a 485 interface.

6. The barrier license plate recognition device based on a lift pole camera mount of claim 1, wherein: The vehicle detection sensor comprises a geomagnetic sensor and an infrared sensor.

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